Weather in Teresina on 18 August 2026
Preliminary outlook for 18 August 2026
A preliminary estimate based on the 2019–2025 archive: daytime around +37°C and nighttime around +21°C, average precipitation 0 mm, wind around 2 m/s, humidity around 45%.
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.
+29°C
Weather archive — latest year: 2025
Clear/Sunny
Weather archive — latest year: 2025
Nighttime: +21°C
Precipitation: 0 mm
Wind: 2 — 3 m/s
Humidity: 50%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +38°C | Sun hours | 12 h |
| UV index | 7 | Cloud cover (avg.) | 28% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +28°C | Dew point (avg.) | +14°C |
| Heat index (avg.) | +28°C | Wind chill (avg.) | +29°C |
| Wind gusts (max.) | 3 m/s | Wind direction (avg.) | 177° ↘ (SE) |
Sunrise
05:56
Duration
11 h 58 min
Sunset
17:54
Moonrise
01:37
Moonset
13:44
Moon phase
Last Quarter
Illumination
29%
+28°C
Weather archive — for 2024 year
Clear/Sunny
Weather archive — for 2024 year
Nighttime: +18°C
Precipitation: 0 mm
Wind: 2 — 3 m/s
Humidity: 48%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +38°C | Sun hours | 12 h |
| UV index | 7 | Cloud cover (avg.) | 14% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +28°C | Dew point (avg.) | +13°C |
| Heat index (avg.) | +28°C | Wind chill (avg.) | +28°C |
| Wind gusts (max.) | 6 m/s | Wind direction (avg.) | 88° → (ESE) |
Sunrise
05:56
Duration
11 h 58 min
Sunset
17:54
Moonrise
17:02
Moonset
04:49
Moon phase
Waxing Gibbous
Illumination
93%
+29°C
Weather archive — for 2023 year
Clear/Sunny
Weather archive — for 2023 year
Nighttime: +21°C
Precipitation: 0 mm
Wind: 2 — 3 m/s
Humidity: 43%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +37°C | Sun hours | 12 h |
| UV index | 7 | Cloud cover (avg.) | 18% |
| Pressure (avg.) | 758 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +29°C | Dew point (avg.) | +14°C |
| Heat index (avg.) | +29°C | Wind chill (avg.) | +29°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 157° → (ESE) |
Sunrise
05:57
Duration
11 h 57 min
Sunset
17:54
Moonrise
07:27
Moonset
19:41
Moon phase
Waxing Crescent
Illumination
9%
+29°C
Weather archive — for 2022 year
Clear/Sunny
Weather archive — for 2022 year
Nighttime: +21°C
Precipitation: 0 mm
Wind: 2 — 3 m/s
Humidity: 42%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +36°C | Sun hours | 12 h |
| UV index | 7 | Cloud cover (avg.) | 27% |
| Pressure (avg.) | 759 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +30°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +30°C | Wind chill (avg.) | +29°C |
| Wind gusts (max.) | 8 m/s | Wind direction (avg.) | 95° → (ESE) |
Sunrise
05:57
Duration
11 h 57 min
Sunset
17:54
Moonrise
23:40
Moonset
11:02
Moon phase
Waning Gibbous
Illumination
54%
+30°C
Weather archive — for 2021 year
Clear/Sunny
Weather archive — for 2021 year
Nighttime: +21°C
Precipitation: 0 mm
Wind: 2 — 3 m/s
Humidity: 44%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +37°C | Sun hours | 8 h |
| UV index | 7 | Cloud cover (avg.) | 31% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +29°C | Dew point (avg.) | +15°C |
| Heat index (avg.) | +30°C | Wind chill (avg.) | +29°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 201° ↘ (SE) |
Sunrise
05:56
Duration
11 h 58 min
Sunset
17:54
Moonrise
14:23
Moonset
02:11
Moon phase
Waxing Gibbous
Illumination
69%
+29°C
Weather archive — for 2020 year
Clear/Sunny
Weather archive — for 2020 year
Nighttime: +23°C
Precipitation: 0 mm
Wind: 2 — 3 m/s
Humidity: 38%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +38°C | Sun hours | 12 h |
| UV index | 7 | Cloud cover (avg.) | 13% |
| Pressure (avg.) | 757 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +30°C | Dew point (avg.) | +12°C |
| Heat index (avg.) | +30°C | Wind chill (avg.) | +30°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 125° → (ESE) |
Sunrise
05:56
Duration
11 h 58 min
Sunset
17:54
Moonrise
05:28
Moonset
17:41
Moon phase
New Moon
Illumination
0%
+29°C
Weather archive — for 2019 year
Clear/Sunny
Weather archive — for 2019 year
Nighttime: +22°C
Precipitation: 0 mm
Wind: 2 — 4 m/s
Humidity: 50%
| Metric | Value | Metric | Value |
|---|---|---|---|
| Day temperature (max.) | +36°C | Sun hours | 12 h |
| UV index | 7 | Cloud cover (avg.) | 19% |
| Pressure (avg.) | 760 mmHg | Snow (total for the day) | 0 cm |
| Visibility (avg.) | 10 km | Sea temperature | — |
| Feels like (avg.) | +30°C | Dew point (avg.) | +16°C |
| Heat index (avg.) | +30°C | Wind chill (avg.) | +29°C |
| Wind gusts (max.) | 9 m/s | Wind direction (avg.) | 136° ↘ (SE) |
Sunrise
05:57
Duration
11 h 57 min
Sunset
17:54
Moonrise
20:23
Moonset
08:04
Moon phase
Waning Gibbous
Illumination
78%
Weather in Teresina on 18 August in previous years
| Year | Day | Nighttime | Average | Sun | UV | Humidity | Wind |
|---|---|---|---|---|---|---|---|
| 2025 |
+38°C
|
+21°C
|
+29°C | 12 h | 7 | 50% | 2 — 3 m/s |
| 2024 |
+38°C
|
+18°C
|
+28°C | 12 h | 7 | 48% | 2 — 3 m/s |
| 2023 |
+37°C
|
+21°C
|
+29°C | 12 h | 7 | 43% | 2 — 3 m/s |
| 2022 |
+36°C
|
+21°C
|
+29°C | 12 h | 7 | 42% | 2 — 3 m/s |
| 2021 |
+37°C
|
+21°C
|
+30°C | 8 h | 7 | 44% | 2 — 3 m/s |
| 2020 |
+38°C
|
+23°C
|
+29°C | 12 h | 7 | 38% | 2 — 3 m/s |
| 2019 |
+36°C
|
+22°C
|
+29°C | 12 h | 7 | 50% | 2 — 4 m/s |