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September

Cayo Guillermo Weather in September with Sea Temperature

September weather in Cayo Guillermo includes average daytime air +32°C, nighttime +24°C, average sea temperature +30°C. Daily water temperatures usually range from +29°C to +30°C, which is comfortable for swimming and beach planning. The tables below also show air temperature, wind, rain and humidity; for near-term water data, open the current 30-day water temperature forecast.

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Averaged values across several years

Daily air temperature for the month

Day Night

Daily sea water temperature for the month

Water

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September	Day	Night	Sea t°	Wind	Precip	Humidity
1Mon	+33°C	+24°C	+30°C	2 m/s	0.6 mm	75%
2Tue	+32°C	+24°C	+30°C	3 m/s	1 mm	79%
3Wed	+32°C	+25°C	+30°C	3 m/s	0.1 mm	78%
4Thu	+32°C	+25°C	+30°C	3 m/s	0.5 mm	78%
5Fri	+33°C	+25°C	+30°C	2 m/s	0.2 mm	77%
6Sat	+33°C	+24°C	+30°C	2 m/s	0.1 mm	78%
7Sun	+33°C	+24°C	+30°C	2 m/s	0.7 mm	78%
8Mon	+33°C	+25°C	+30°C	2 m/s	0.2 mm	78%
9Tue	+33°C	+24°C	+29°C	2 m/s	0.2 mm	77%
10Wed	+33°C	+24°C	+30°C	2 m/s	1.9 mm	77%
11Thu	+33°C	+24°C	+30°C	3 m/s	0.7 mm	79%
12Fri	+33°C	+24°C	+30°C	3 m/s	0.1 mm	79%
13Sat	+32°C	+24°C	+30°C	2 m/s	0.5 mm	78%
14Sun	+32°C	+24°C	+29°C	2 m/s	0.1 mm	79%
15Mon	+33°C	+25°C	+29°C	2 m/s	0.8 mm	78%
16Tue	+33°C	+24°C	+30°C	2 m/s	0.6 mm	78%
17Wed	+34°C	+24°C	+30°C	2 m/s	0.7 mm	78%
18Thu	+33°C	+24°C	+30°C	2 m/s	3.7 mm	80%
19Fri	+33°C	+24°C	+30°C	2 m/s	0.2 mm	80%
20Sat	+33°C	+24°C	+30°C	2 m/s	0.2 mm	80%
21Sun	+33°C	+24°C	+30°C	2 m/s	0.1 mm	80%
22Mon	+32°C	+24°C	+30°C	2 m/s	1.3 mm	82%
23Tue	+32°C	+24°C	+30°C	2 m/s	0.7 mm	81%
24Wed	+32°C	+24°C	+30°C	3 m/s	0.3 mm	82%
25Thu	+32°C	+24°C	+30°C	3 m/s	1.1 mm	81%
26Fri	+31°C	+25°C	+30°C	3 m/s	1.5 mm	82%
27Sat	+32°C	+25°C	+30°C	3 m/s	0.7 mm	82%
28Sun	+32°C	+25°C	+30°C	3 m/s	0.3 mm	82%
29Mon	+32°C	+25°C	+30°C	3 m/s	2.5 mm	83%
30Tue	+32°C	+24°C	+30°C	3 m/s	7.6 mm	82%

Sea water temperature by months

Water +30°C

Day and night air temperature

Day +33°C Night +24°C

Weather highs and lows in Cayo Guillermo for september

Warmest day: 17 september, +34°C
Coldest night: 23 september, +24°C
Max precipitation: 30 september, 7.6 mm
Warmest sea water: 1 september, +30°C
Coldest sea water: 9 september, +29°C

Climate in Cayo Guillermo in september

Average daytime temperature: +32°C
Average nighttime temperature: +24°C
Sea water temperature: —
Precipitation (monthly average): 29.2 mm
Days with precipitation: 6.3
Humidity: 79%
Wind: 2 m/s
Data: 7 years / coverage 100%

Daily air temperature for the month

Day Night

Daily sea water temperature for the month

Water

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September	Day	Night	Sea t°	Wind	Precip	Humidity
1Mon	+35°C	+24°C	+30°C	1-2 m/s, SW	1.7 mm	82%
2Tue	+33°C	+25°C	+30°C	2-3 m/s, SSW	0 mm	80%
3Wed	+33°C	+27°C	+30°C	2-3 m/s, WSW	0 mm	80%
4Thu	+32°C	+26°C	+30°C	3-4 m/s, SSW	0 mm	78%
5Fri	+33°C	+26°C	+30°C	2-3 m/s, S	0 mm	79%
6Sat	+34°C	+24°C	+30°C	1-2 m/s, SW	0 mm	83%
7Sun	+33°C	+23°C	+30°C	1-2 m/s, S	1.2 mm	81%
8Mon	+34°C	+24°C	+30°C	2-3 m/s, SSW	0 mm	82%
9Tue	+33°C	+25°C	+29°C	2-3 m/s, SSW	0 mm	79%
10Wed	+35°C	+24°C	+30°C	1-2 m/s, SE	0 mm	78%
11Thu	+34°C	+24°C	+30°C	2-3 m/s, E	2.2 mm	78%
12Fri	+35°C	+24°C	+30°C	2-3 m/s, WSW	0 mm	80%
13Sat	+31°C	+23°C	+30°C	1-3 m/s, W	2.8 mm	86%
14Sun	+32°C	+23°C	+29°C	2 m/s, SSW	0 mm	82%
15Mon	+34°C	+24°C	+29°C	1-2 m/s, SSE	2.2 mm	80%
16Tue	+33°C	+23°C	+30°C	3-4 m/s, ENE	3.6 mm	84%
17Wed	+34°C	+25°C	+30°C	3-4 m/s, ENE	3.6 mm	84%
18Thu	+32°C	+24°C	+30°C	2-4 m/s, ENE	25.9 mm	88%
19Fri	+34°C	+23°C	+30°C	2-3 m/s, SW	0 mm	80%
20Sat	+35°C	+24°C	+30°C	2-3 m/s, NE	0 mm	79%
21Sun	+32°C	+24°C	+30°C	2-3 m/s, SE	0 mm	85%
22Mon	+32°C	+24°C	+30°C	2-3 m/s, S	0 mm	85%
23Tue	+36°C	+23°C	+30°C	2-3 m/s, S	0 mm	76%
24Wed	+34°C	+25°C	+30°C	2-3 m/s, ESE	0 mm	82%
25Thu	+34°C	+25°C	+30°C	2-3 m/s, ESE	2.6 mm	81%
26Fri	+32°C	+25°C	+30°C	2-3 m/s, E	0 mm	85%
27Sat	+35°C	+25°C	+30°C	3-4 m/s, NNE	0 mm	80%
28Sun	+34°C	+24°C	+30°C	2 m/s, NNW	0 mm	84%
29Mon	+32°C	+25°C	+30°C	2-4 m/s, SW	0 mm	82%
30Tue	+33°C	+25°C	+30°C	2-4 m/s, WSW	0 mm	80%

Weather highs and lows in Cayo Guillermo for september

Warmest day: 23 september, +36°C
Coldest night: 7 september, +23°C
Max precipitation: 18 september, 25.9 mm
Warmest water: 1 september, +30°C
Coldest water: 9 september, +29°C

Climate in Cayo Guillermo in september

Year: 2025
Average daytime temperature: +33°C
Average nighttime temperature: +24°C
Water temperature: +30°C
Precipitation (month): 45.8 mm
Days with precipitation: 9
Humidity: 81%
Wind: 2 m/s

Daily air temperature for the month

Day Night

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September	Day	Night	Sea t°	Wind	Precip	Humidity
1Sun	+32°C	+24°C	—	2 m/s, SE	1.1 mm	77%
2Mon	+31°C	+24°C	—	2 m/s, SSE	0.5 mm	80%
3Tue	+32°C	+25°C	—	1-2 m/s, SE	0 mm	79%
4Wed	+32°C	+25°C	—	3-4 m/s, E	0 mm	83%
5Thu	+32°C	+25°C	—	3-4 m/s, ESE	0.4 mm	80%
6Fri	+32°C	+24°C	—	2-3 m/s, SE	0.2 mm	80%
7Sat	+31°C	+24°C	—	2-3 m/s, SE	0 mm	81%
8Sun	+33°C	+25°C	—	2-3 m/s, SSE	0.2 mm	76%
9Mon	+33°C	+25°C	—	2 m/s, ESE	0 mm	78%
10Tue	+32°C	+25°C	—	2-3 m/s, ESE	12.6 mm	80%
11Wed	+32°C	+25°C	—	2-3 m/s, SSE	0 mm	80%
12Thu	+32°C	+25°C	—	2 m/s, S	0 mm	80%
13Fri	+33°C	+25°C	—	2-3 m/s, SW	0 mm	77%
14Sat	+32°C	+25°C	—	1-2 m/s, SW	0.1 mm	80%
15Sun	+32°C	+25°C	—	2-3 m/s, SSW	1.5 mm	80%
16Mon	+32°C	+25°C	—	2-3 m/s, SSW	0 mm	78%
17Tue	+35°C	+25°C	—	2-3 m/s, SE	0.1 mm	83%
18Wed	+34°C	+25°C	—	2-3 m/s, SE	0 mm	82%
19Thu	+33°C	+25°C	—	2-3 m/s, W	0.9 mm	82%
20Fri	+31°C	+23°C	—	2 m/s, SSW	0.1 mm	85%
21Sat	+34°C	+24°C	—	1-2 m/s, S	0 mm	82%
22Sun	+32°C	+24°C	—	1 m/s, NE	0.4 mm	86%
23Mon	+34°C	+23°C	—	3-4 m/s, E	1.8 mm	83%
24Tue	+31°C	+24°C	—	4 m/s, ESE	1.1 mm	87%
25Wed	+27°C	+25°C	—	6-9 m/s, SSE	1.7 mm	88%
26Thu	+29°C	+26°C	—	7-9 m/s, S	2.8 mm	88%
27Fri	+31°C	+27°C	—	4-5 m/s, S	1.4 mm	84%
28Sat	+33°C	+26°C	—	2-3 m/s, SSE	0 mm	84%
29Sun	+32°C	+25°C	—	3 m/s, ESE	14.7 mm	89%
30Mon	+33°C	+24°C	—	2 m/s, SE	43.1 mm	89%

Weather highs and lows in Cayo Guillermo for september

Warmest day: 17 september, +35°C
Coldest night: 20 september, +23°C
Max precipitation: 30 september, 43.1 mm
Warmest water: —
Coldest water: —

Climate in Cayo Guillermo in september

Year: 2024
Average daytime temperature: +32°C
Average nighttime temperature: +25°C
Water temperature: —
Precipitation (month): 84.7 mm
Days with precipitation: 10
Humidity: 82%
Wind: 2 m/s

Daily air temperature for the month

Day Night

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September	Day	Night	Sea t°	Wind	Precip	Humidity
1Fri	+37°C	+25°C	—	3-5 m/s, E	0 mm	68%
2Sat	+32°C	+24°C	—	4-5 m/s, ENE	1.3 mm	78%
3Sun	+32°C	+23°C	—	4-5 m/s, ENE	0 mm	74%
4Mon	+34°C	+24°C	—	3-4 m/s, SSE	0.1 mm	73%
5Tue	+34°C	+24°C	—	2-3 m/s, S	1.3 mm	72%
6Wed	+36°C	+24°C	—	2-3 m/s, WNW	0.1 mm	78%
7Thu	+34°C	+23°C	—	2-3 m/s, SE	0 mm	77%
8Fri	+32°C	+24°C	—	2-3 m/s, S	0 mm	77%
9Sat	+34°C	+23°C	—	2-3 m/s, SSW	0 mm	74%
10Sun	+34°C	+22°C	—	1-2 m/s, SSE	0 mm	72%
11Mon	+35°C	+24°C	—	3-4 m/s, E	0 mm	75%
12Tue	+35°C	+22°C	—	3-4 m/s, E	0 mm	71%
13Wed	+35°C	+23°C	—	3-4 m/s, NE	0 mm	72%
14Thu	+37°C	+24°C	—	2-3 m/s, E	0 mm	74%
15Fri	+36°C	+23°C	—	2-3 m/s, SSE	0.7 mm	77%
16Sat	+35°C	+24°C	—	1-3 m/s, SSE	0 mm	75%
17Sun	+37°C	+22°C	—	2-3 m/s, SW	0.1 mm	71%
18Mon	+36°C	+23°C	—	1-2 m/s, SW	0 mm	76%
19Tue	+37°C	+24°C	—	2-3 m/s, SSE	0 mm	78%
20Wed	+35°C	+23°C	—	2-3 m/s, SSW	0.1 mm	75%
21Thu	+36°C	+23°C	—	2-4 m/s, W	0 mm	78%
22Fri	+33°C	+24°C	—	2-3 m/s, WSW	0.1 mm	77%
23Sat	+32°C	+23°C	—	1-3 m/s, SSW	0 mm	77%
24Sun	+32°C	+24°C	—	3-4 m/s, S	0.4 mm	76%
25Mon	+33°C	+23°C	—	2-3 m/s, SE	0.1 mm	78%
26Tue	+33°C	+24°C	—	2-3 m/s, E	2.5 mm	80%
27Wed	+33°C	+23°C	—	2-3 m/s, ESE	0.5 mm	79%
28Thu	+33°C	+24°C	—	3-4 m/s, S	0 mm	77%
29Fri	+34°C	+24°C	—	2-3 m/s, SSE	0 mm	80%
30Sat	+34°C	+25°C	—	2 m/s, S	5.1 mm	79%

Weather highs and lows in Cayo Guillermo for september

Warmest day: 1 september, +37°C
Coldest night: 10 september, +22°C
Max precipitation: 30 september, 5.1 mm
Warmest water: —
Coldest water: —

Climate in Cayo Guillermo in september

Year: 2023
Average daytime temperature: +34°C
Average nighttime temperature: +24°C
Water temperature: —
Precipitation (month): 12.4 mm
Days with precipitation: 4
Humidity: 76%
Wind: 2 m/s

Daily air temperature for the month

Day Night

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September	Day	Night	Sea t°	Wind	Precip	Humidity
1Thu	+33°C	+24°C	—	3 m/s, NE	0 mm	71%
2Fri	+33°C	+24°C	—	3-4 m/s, E	0 mm	75%
3Sat	+33°C	+24°C	—	3-4 m/s, ESE	0 mm	72%
4Sun	+33°C	+24°C	—	3 m/s, SE	0.7 mm	76%
5Mon	+34°C	+23°C	—	2-3 m/s, S	0 mm	73%
6Tue	+34°C	+25°C	—	2 m/s, SE	0 mm	75%
7Wed	+34°C	+24°C	—	2-3 m/s, ESE	2.7 mm	75%
8Thu	+32°C	+24°C	—	3-4 m/s, SSW	0 mm	77%
9Fri	+33°C	+24°C	—	3-5 m/s, S	0 mm	72%
10Sat	+33°C	+24°C	—	2-3 m/s, SSE	0.1 mm	72%
11Sun	+34°C	+24°C	—	2-3 m/s, SE	0 mm	77%
12Mon	+34°C	+25°C	—	2-3 m/s, ESE	0 mm	78%
13Tue	+33°C	+24°C	—	2-3 m/s, SE	0 mm	76%
14Wed	+32°C	+24°C	—	3-4 m/s, SSW	0.1 mm	78%
15Thu	+33°C	+24°C	—	2 m/s, SSE	0 mm	75%
16Fri	+35°C	+24°C	—	3 m/s, E	0.5 mm	76%
17Sat	+33°C	+24°C	—	3 m/s, E	0 mm	77%
18Sun	+33°C	+24°C	—	3 m/s, E	0 mm	77%
19Mon	+33°C	+24°C	—	2-3 m/s, ESE	0 mm	77%
20Tue	+33°C	+24°C	—	2-3 m/s, SE	0 mm	77%
21Wed	+33°C	+23°C	—	1-2 m/s, N	0.1 mm	76%
22Thu	+33°C	+23°C	—	2-3 m/s, WSW	0 mm	76%
23Fri	+33°C	+24°C	—	1-2 m/s, WSW	0.1 mm	77%
24Sat	+33°C	+24°C	—	3 m/s, ENE	0 mm	78%
25Sun	+32°C	+24°C	—	3-4 m/s, SSE	1 mm	79%
26Mon	+29°C	+24°C	—	4-5 m/s, SE	1.4 mm	81%
27Tue	+28°C	+24°C	—	7-8 m/s, SE	1.7 mm	88%
28Wed	+29°C	+25°C	—	6-7 m/s, S	1.8 mm	84%
29Thu	+31°C	+25°C	—	3-4 m/s, SW	2.7 mm	83%
30Fri	+30°C	+24°C	—	2-3 m/s, W	0.6 mm	83%

Weather highs and lows in Cayo Guillermo for september

Warmest day: 16 september, +35°C
Coldest night: 5 september, +23°C
Max precipitation: 7 september, 2.7 mm
Warmest water: —
Coldest water: —

Climate in Cayo Guillermo in september

Year: 2022
Average daytime temperature: +33°C
Average nighttime temperature: +24°C
Water temperature: —
Precipitation (month): 13.5 mm
Days with precipitation: 6
Humidity: 77%
Wind: 3 m/s

Daily air temperature for the month

Day Night

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September	Day	Night	Sea t°	Wind	Precip	Humidity
1Wed	+34°C	+23°C	—	1-2 m/s, SW	1 mm	73%
2Thu	+33°C	+23°C	—	2-3 m/s, S	0 mm	74%
3Fri	+34°C	+23°C	—	1-2 m/s, SSE	0 mm	77%
4Sat	+33°C	+23°C	—	1-2 m/s, WNW	2.8 mm	79%
5Sun	+32°C	+23°C	—	2 m/s, SSW	0 mm	76%
6Mon	+33°C	+23°C	—	1-2 m/s, WSW	0.2 mm	76%
7Tue	+33°C	+24°C	—	2 m/s, SE	0.5 mm	74%
8Wed	+34°C	+24°C	—	2-3 m/s, ESE	0 mm	76%
9Thu	+35°C	+23°C	—	2-3 m/s, SSE	0 mm	76%
10Fri	+34°C	+24°C	—	2 m/s, ESE	0.2 mm	75%
11Sat	+34°C	+23°C	—	3-4 m/s, ESE	0 mm	75%
12Sun	+33°C	+24°C	—	3 m/s, E	0 mm	77%
13Mon	+33°C	+24°C	—	3-4 m/s, ESE	0.1 mm	75%
14Tue	+33°C	+24°C	—	2-3 m/s, ESE	0.1 mm	77%
15Wed	+32°C	+24°C	—	2-3 m/s, SE	0.7 mm	78%
16Thu	+33°C	+23°C	—	2-3 m/s, S	0.1 mm	75%
17Fri	+34°C	+24°C	—	2-3 m/s, ESE	0 mm	71%
18Sat	+34°C	+24°C	—	3-4 m/s, E	0 mm	77%
19Sun	+33°C	+24°C	—	3 m/s, ENE	0.1 mm	78%
20Mon	+34°C	+24°C	—	3-4 m/s, E	0.8 mm	77%
21Tue	+34°C	+24°C	—	3-4 m/s, ESE	0 mm	74%
22Wed	+33°C	+23°C	—	2-3 m/s, SE	2.5 mm	79%
23Thu	+31°C	+24°C	—	2-3 m/s, SSE	0.3 mm	81%
24Fri	+33°C	+24°C	—	2-3 m/s, SSW	0 mm	78%
25Sat	+33°C	+24°C	—	2 m/s, SE	0.2 mm	78%
26Sun	+33°C	+24°C	—	1-2 m/s, NNE	0.1 mm	77%
27Mon	+32°C	+24°C	—	3 m/s, ENE	0.5 mm	81%
28Tue	+32°C	+24°C	—	2-3 m/s, SE	0.1 mm	80%
29Wed	+31°C	+23°C	—	2-3 m/s, ENE	0.1 mm	83%
30Thu	+31°C	+23°C	—	3 m/s, ENE	1.3 mm	83%

Weather highs and lows in Cayo Guillermo for september

Warmest day: 9 september, +35°C
Coldest night: 1 september, +23°C
Max precipitation: 4 september, 2.8 mm
Warmest water: —
Coldest water: —

Climate in Cayo Guillermo in september

Year: 2021
Average daytime temperature: +33°C
Average nighttime temperature: +24°C
Water temperature: —
Precipitation (month): 11.7 mm
Days with precipitation: 4
Humidity: 77%
Wind: 2 m/s

Daily air temperature for the month

Day Night

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September	Day	Night	Sea t°	Wind	Precip	Humidity
1Tue	+33°C	+25°C	—	4-5 m/s, E	0 mm	79%
2Wed	+32°C	+25°C	—	4-5 m/s, ENE	5.3 mm	81%
3Thu	+33°C	+25°C	—	4-5 m/s, ESE	0 mm	78%
4Fri	+32°C	+25°C	—	3-4 m/s, ENE	0.1 mm	80%
5Sat	+32°C	+25°C	—	3-4 m/s, E	0 mm	81%
6Sun	+30°C	+24°C	—	2-3 m/s, ENE	0.1 mm	77%
7Mon	+31°C	+25°C	—	2 m/s, SSW	0.1 mm	77%
8Tue	+31°C	+25°C	—	1-2 m/s, SSW	1.5 mm	76%
9Wed	+32°C	+25°C	—	1 m/s, E	1.2 mm	78%
10Thu	+31°C	+25°C	—	2-3 m/s, SE	0.1 mm	82%
11Fri	+31°C	+25°C	—	2-3 m/s, S	2.5 mm	84%
12Sat	+30°C	+26°C	—	3-5 m/s, SSW	0.6 mm	82%
13Sun	+31°C	+25°C	—	2-3 m/s, S	0.1 mm	80%
14Mon	+30°C	+25°C	—	2-3 m/s, S	0.2 mm	84%
15Tue	+30°C	+25°C	—	2 m/s, ESE	0.4 mm	84%
16Wed	+31°C	+25°C	—	2-3 m/s, SE	0.2 mm	83%
17Thu	+31°C	+25°C	—	2-3 m/s, SSE	0.3 mm	82%
18Fri	+31°C	+25°C	—	2-3 m/s, S	0 mm	81%
19Sat	+30°C	+25°C	—	1-2 m/s, ESE	0.7 mm	82%
20Sun	+31°C	+25°C	—	2-3 m/s, SSE	0.3 mm	82%
21Mon	+31°C	+25°C	—	2-3 m/s, NE	0.1 mm	83%
22Tue	+30°C	+24°C	—	3-5 m/s, ENE	2 mm	87%
23Wed	+29°C	+24°C	—	3-5 m/s, E	0.6 mm	84%
24Thu	+30°C	+24°C	—	3-4 m/s, S	0.2 mm	84%
25Fri	+31°C	+26°C	—	3-4 m/s, S	1.9 mm	81%
26Sat	+31°C	+25°C	—	2 m/s, S	3.5 mm	81%
27Sun	+31°C	+25°C	—	2 m/s, E	0.7 mm	82%
28Mon	+30°C	+24°C	—	3 m/s, ESE	0 mm	83%
29Tue	+32°C	+25°C	—	2-3 m/s, SSE	0 mm	79%
30Wed	+31°C	+25°C	—	2-3 m/s, SSE	3.2 mm	78%

Weather highs and lows in Cayo Guillermo for september

Warmest day: 1 september, +33°C
Coldest night: 6 september, +24°C
Max precipitation: 2 september, 5.3 mm
Warmest water: —
Coldest water: —

Climate in Cayo Guillermo in september

Year: 2020
Average daytime temperature: +31°C
Average nighttime temperature: +25°C
Water temperature: —
Precipitation (month): 25.9 mm
Days with precipitation: 8
Humidity: 81%
Wind: 2 m/s

Daily air temperature for the month

Day Night

Tap a date to open detailed weather for that day

September	Day	Night	Sea t°	Wind	Precip	Humidity
1Sun	+30°C	+26°C	—	3-4 m/s, SSW	0.2 mm	78%
2Mon	+29°C	+26°C	—	4-5 m/s, SW	0.1 mm	83%
3Tue	+30°C	+26°C	—	4-6 m/s, SW	0.4 mm	83%
4Wed	+30°C	+26°C	—	3-4 m/s, SSW	0 mm	79%
5Thu	+32°C	+26°C	—	1 m/s, SE	0 mm	77%
6Fri	+32°C	+26°C	—	1-2 m/s, E	0 mm	80%
7Sat	+33°C	+26°C	—	2-3 m/s, E	0.1 mm	79%
8Sun	+32°C	+26°C	—	3-4 m/s, E	0 mm	80%
9Mon	+31°C	+26°C	—	3-4 m/s, ESE	0.2 mm	81%
10Tue	+31°C	+26°C	—	4-6 m/s, ENE	0 mm	81%
11Wed	+30°C	+25°C	—	4-5 m/s, ENE	0 mm	82%
12Thu	+31°C	+25°C	—	3-6 m/s, NE	0.3 mm	83%
13Fri	+31°C	+25°C	—	2-3 m/s, SW	0.5 mm	82%
14Sat	+31°C	+26°C	—	3-4 m/s, S	0 mm	76%
15Sun	+32°C	+27°C	—	1-2 m/s, NE	0 mm	75%
16Mon	+34°C	+26°C	—	1-2 m/s, NE	0 mm	78%
17Tue	+32°C	+26°C	—	2-3 m/s, NW	1 mm	79%
18Wed	+31°C	+25°C	—	3-5 m/s, NNE	0 mm	80%
19Thu	+30°C	+24°C	—	5-6 m/s, NE	0 mm	80%
20Fri	+30°C	+24°C	—	4 m/s, ENE	0 mm	83%
21Sat	+30°C	+25°C	—	4-6 m/s, ENE	0.8 mm	85%
22Sun	+30°C	+25°C	—	2-4 m/s, ENE	4.1 mm	84%
23Mon	+30°C	+25°C	—	2-3 m/s, SSE	1.8 mm	86%
24Tue	+29°C	+24°C	—	4 m/s, ENE	0.2 mm	87%
25Wed	+31°C	+24°C	—	3-4 m/s, NE	0 mm	84%
26Thu	+31°C	+24°C	—	3 m/s, E	0.1 mm	82%
27Fri	+31°C	+25°C	—	3 m/s, ESE	0 mm	80%
28Sat	+31°C	+25°C	—	2-3 m/s, SE	0.5 mm	83%
29Sun	+30°C	+25°C	—	4-5 m/s, NE	0 mm	85%
30Mon	+30°C	+24°C	—	5-7 m/s, NE	0.2 mm	84%

Weather highs and lows in Cayo Guillermo for september

Warmest day: 16 september, +34°C
Coldest night: 19 september, +24°C
Max precipitation: 22 september, 4.1 mm
Warmest water: —
Coldest water: —

Climate in Cayo Guillermo in september

Year: 2019
Average daytime temperature: +31°C
Average nighttime temperature: +25°C
Water temperature: —
Precipitation (month): 10.5 mm
Days with precipitation: 3
Humidity: 81%
Wind: 3 m/s

Weather in Cayo Guillermo in september by year

Year	Day	Night	Precipitation	Days with precipitation	Water
2025	+33°C	+24°C	45.8 mm	9	+30°C
2024	+32°C	+25°C	84.7 mm	10	—
2023	+34°C	+24°C	12.4 mm	4	—
2022	+33°C	+24°C	13.5 mm	6	—
2021	+33°C	+24°C	11.7 mm	4	—
2020	+31°C	+25°C	25.9 mm	8	—
2019	+31°C	+25°C	10.5 mm	3	—

Comparison september in Cayo Guillermo with other months

Month	Day	Night	Days with precipitation	Sunny days
January	+28°C	+19°C	0	14
February	+30°C	+20°C	1	15
March	+31°C	+21°C	1	19
April	+32°C	+22°C	2	17
May	+32°C	+24°C	7	9
June	+32°C	+24°C	6	5
July	+33°C	+24°C	6	7
August	+33°C	+25°C	8	5
September	+33°C	+24°C	6	5
October	+31°C	+23°C	5	6
November	+30°C	+21°C	2	9
December	+28°C	+20°C	2	13