Weather in San Tome on 18 August 2026
Preliminary outlook for 18 August 2026
A preliminary estimate based on the 2019–2025 archive: daytime around +32°C and nighttime around +23°C, average precipitation 0.2 mm, wind around 2 m/s, humidity around 81%.
This is a climate-based estimate, not a precise long-range forecast. It is replaced by hourly data when the date enters the forecast window.
+27°C
Weather archive — latest year: 2025
Cloudy
Weather archive — latest year: 2025
Nighttime: +22°C
Precipitation: 0 mm
Wind: 1 — 1 m/s
Humidity: 76%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +35°C | Sun hours | 8 h |
| UV index | 7 | Cloud cover (avg.) | 55% |
| Pressure (avg.) | 759 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 8 km | Sea temperature | — |
| Feels like (avg.) | +30°C | Dew point (avg.) | +22°C |
| Heat index (avg.) | +30°C | Wind chill (avg.) | +27°C |
| Wind gusts (max.) | 3 m/s | Wind direction (avg.) | 154° → (ESE) |
Sunrise
06:03
Duration
12 h 22 min
Sunset
18:25
Moonrise
01:30
Moonset
14:37
Moon phase
Last Quarter
Illumination
29%
+27°C
Weather archive — for 2024 year
Partly Cloudy
Weather archive — for 2024 year
Nighttime: +22°C
Precipitation: 0 mm
Wind: 2 — 2 m/s
Humidity: 77%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +36°C | Sun hours | 11 h |
| UV index | 7 | Cloud cover (avg.) | 35% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 8 km | Sea temperature | — |
| Feels like (avg.) | +30°C | Dew point (avg.) | +23°C |
| Heat index (avg.) | +30°C | Wind chill (avg.) | +27°C |
| Wind gusts (max.) | 4 m/s | Wind direction (avg.) | 99° ↗ (NE) |
Sunrise
06:03
Duration
12 h 22 min
Sunset
18:25
Moonrise
17:46
Moonset
04:48
Moon phase
Waxing Gibbous
Illumination
93%
+26°C
Weather archive — for 2023 year
Cloudy
Weather archive — for 2023 year
Nighttime: +23°C
Precipitation: 0 mm
Wind: 2 — 3 m/s
Humidity: 90%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +32°C | Sun hours | 6 h |
| UV index | 7 | Cloud cover (avg.) | 69% |
| Pressure (avg.) | 757 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 5 km | Sea temperature | — |
| Feels like (avg.) | +31°C | Dew point (avg.) | +25°C |
| Heat index (avg.) | +31°C | Wind chill (avg.) | +26°C |
| Wind gusts (max.) | 4 m/s | Wind direction (avg.) | 66° ↗ (ENE) |
Sunrise
06:03
Duration
12 h 22 min
Sunset
18:25
Moonrise
07:41
Moonset
20:07
Moon phase
Waxing Crescent
Illumination
9%
+27°C
Weather archive — for 2022 year
Patchy rain nearby
Weather archive — for 2022 year
Nighttime: +23°C
Precipitation: 0.1 mm
Wind: 2 — 2 m/s
Humidity: 75%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +32°C | Sun hours | 6 h |
| UV index | 7 | Cloud cover (avg.) | 40% |
| Pressure (avg.) | 758 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +30°C | Dew point (avg.) | +22°C |
| Heat index (avg.) | +30°C | Wind chill (avg.) | +27°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 62° ↗ (NE) |
Sunrise
06:03
Duration
12 h 22 min
Sunset
18:25
Moonrise
23:42
Moonset
11:41
Moon phase
Waning Gibbous
Illumination
54%
+25°C
Weather archive — for 2021 year
Patchy rain nearby
Weather archive — for 2021 year
Nighttime: +22°C
Precipitation: 0.6 mm
Wind: 2 — 3 m/s
Humidity: 85%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +30°C | Sun hours | 5 h |
| UV index | 6 | Cloud cover (avg.) | 85% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 5 km | Sea temperature | — |
| Feels like (avg.) | +28°C | Dew point (avg.) | +23°C |
| Heat index (avg.) | +28°C | Wind chill (avg.) | +26°C |
| Wind gusts (max.) | 7 m/s | Wind direction (avg.) | 63° ↗ (ENE) |
Sunrise
06:03
Duration
12 h 22 min
Sunset
18:25
Moonrise
15:13
Moonset
02:07
Moon phase
Waxing Gibbous
Illumination
69%
+27°C
Weather archive — for 2020 year
Cloudy
Weather archive — for 2020 year
Nighttime: +24°C
Precipitation: 0.8 mm
Wind: 2 — 2 m/s
Humidity: 82%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +31°C | Sun hours | 12 h |
| UV index | 6 | Cloud cover (avg.) | 68% |
| Pressure (avg.) | 757 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 8 km | Sea temperature | — |
| Feels like (avg.) | +30°C | Dew point (avg.) | +24°C |
| Heat index (avg.) | +30°C | Wind chill (avg.) | +27°C |
| Wind gusts (max.) | 5 m/s | Wind direction (avg.) | 151° ↘ (SSE) |
Sunrise
06:03
Duration
12 h 22 min
Sunset
18:25
Moonrise
05:30
Moonset
18:20
Moon phase
New Moon
Illumination
0%
+26°C
Weather archive — for 2019 year
Overcast
Weather archive — for 2019 year
Nighttime: +22°C
Precipitation: 0 mm
Wind: 1 — 2 m/s
Humidity: 83%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +31°C | Sun hours | 6 h |
| UV index | 6 | Cloud cover (avg.) | 81% |
| Pressure (avg.) | 761 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 9 km | Sea temperature | — |
| Feels like (avg.) | +30°C | Dew point (avg.) | +24°C |
| Heat index (avg.) | +30°C | Wind chill (avg.) | +27°C |
| Wind gusts (max.) | 4 m/s | Wind direction (avg.) | 93° ↓ (S) |
Sunrise
06:03
Duration
12 h 22 min
Sunset
18:25
Moonrise
20:47
Moonset
08:20
Moon phase
Waning Gibbous
Illumination
78%
Weather in San Tome on 18 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+35°C
|
+22°C
|
+27°C | 8 h | 7 | 76% | 1 — 1 m/s |
| 2024 |
+36°C
|
+22°C
|
+27°C | 11 h | 7 | 77% | 2 — 2 m/s |
| 2023 |
+32°C
|
+23°C
|
+26°C | 6 h | 7 | 90% | 2 — 3 m/s |
| 2022 |
+32°C
|
+23°C
|
+27°C | 6 h | 7 | 75% | 2 — 2 m/s |
| 2021 |
+30°C
|
+22°C
|
+25°C | 5 h | 6 | 85% | 2 — 3 m/s |
| 2020 |
+31°C
|
+24°C
|
+27°C | 12 h | 6 | 82% | 2 — 2 m/s |
| 2019 |
+31°C
|
+22°C
|
+26°C | 6 h | 6 | 83% | 1 — 2 m/s |