Climate averages 1991–2020
Teresina weather
in December.
A hot, wet month: the 5th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a hot month in Teresina: daytime highs average 33.8°C and nights cool to about 24.2°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 93 mm of rain on roughly 11 days, which makes December a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 25 min on an average December day.
The nearest other city in this atlas is Caxias (67 km away). In December its highs average 33.1°C, 0.7°C cooler than Teresina, with 103 mm of rain.
Among the 448 cities listed in Brazil, Teresina ranks joint 12th of 448 for the warmest December highs and 84th of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Teresina is 5.3°C warmer than that mean.
From December to January, average highs fall by 2.8°C to 31.0°C, and monthly rainfall rises from 93 mm to 235 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Teresina climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 31.0°C23.2°C | 23.2°C | 235 | 22.5 | 12.412 h |
| February | 30.2°C22.9°C | 22.9°C | 283 | 22.8 | 12.312 h |
| March | 29.9°C22.9°C | 22.9°C | 328 | 26.9 | 12.112 h |
| April | 29.9°C23.0°C | 23.0°C | 264 | 23.3 | 12.012 h |
| May | 30.9°C23.1°C | 23.1°C | 124 | 12.7 | 11.912 h |
| June | 32.6°C23.2°C | 23.2°C | 16 | 2.9 | 11.812 h |
| July | 33.5°C23.2°C | 23.2°C | 8.7 | 1.5 | 11.912 h |
| August | 35.0°C23.5°C | 23.5°C | 2.1 | 0.5 | 11.912 h |
| September | 36.5°C24.1°C | 24.1°C | 3.3 | 0.9 | 12.112 h |
| October | 36.9°C24.5°C | 24.5°C | 15 | 2.0 | 12.212 h |
| November | 35.6°C24.6°C | 24.6°C | 41 | 5.8 | 12.312 h |
| December, selected | 33.8°C24.2°C | 24.2°C | 93 | 11.4 | 12.412 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Caxias in DecemberBrazil · 67 kmHigh 33.1°C · Low 24.1°C · 103 mm rain
- Codó in DecemberBrazil · 139 kmHigh 32.9°C · Low 24.3°C · 112 mm rain
- Chapadinha in DecemberBrazil · 162 kmHigh 33.8°C · Low 24.7°C · 63 mm rain
- Crateús in DecemberBrazil · 236 kmHigh 34.3°C · Low 23.6°C · 20 mm rain
- Bacabal in DecemberBrazil · 239 kmHigh 32.6°C · Low 24.5°C · 131 mm rain
- Tianguá in DecemberBrazil · 251 kmHigh 30.0°C · Low 20.4°C · 32 mm rain
- Picos in DecemberBrazil · 266 kmHigh 34.5°C · Low 25.7°C · 58 mm rain
- Parnaíba in DecemberBrazil · 268 kmHigh 32.1°C · Low 25.5°C · 35 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Teresina) is explained once on the Teresina year overview and on the Sources, method and limits page.