Climate averages 1991–2020
Parnaíba weather
in December.
A hot, fairly dry month: the 6th 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 Parnaíba: daytime highs average 32.1°C and nights cool to about 25.5°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 35 mm of rain on roughly 7 days, which makes December a fairly dry month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 17 min on an average December day.
The nearest other city in this atlas is Tianguá (127 km away). In December its highs average 30.0°C, 2.1°C cooler than Parnaíba, with 32 mm of rain.
Among the 448 cities listed in Brazil, Parnaíba ranks joint 28th of 448 for the warmest December highs and 48th of 448 for the driest December (rainfall, lowest first). The mean December high of those 448 cities is 28.5°C; Parnaíba is 3.6°C warmer than that mean.
From December to January, average highs fall by 1.9°C to 30.1°C, and monthly rainfall rises from 35 mm to 129 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
Parnaíba climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.1°C24.9°C | 24.9°C | 129 | 20.0 | 12.312 h |
| February | 29.4°C24.7°C | 24.7°C | 172 | 23.3 | 12.212 h |
| March | 29.1°C24.6°C | 24.6°C | 265 | 27.7 | 12.112 h |
| April | 29.2°C24.7°C | 24.7°C | 268 | 25.9 | 12.012 h |
| May | 30.0°C24.9°C | 24.9°C | 148 | 17.9 | 12.012 h |
| June | 31.0°C24.9°C | 24.9°C | 31 | 7.0 | 12.012 h |
| July | 32.2°C24.8°C | 24.8°C | 16 | 2.7 | 12.012 h |
| August | 33.4°C24.8°C | 24.8°C | 2.6 | 0.5 | 12.012 h |
| September | 33.8°C25.0°C | 25.0°C | 1.1 | 0.2 | 12.112 h |
| October | 33.6°C25.2°C | 25.2°C | 5.6 | 0.7 | 12.212 h |
| November | 33.1°C25.5°C | 25.5°C | 7.4 | 1.6 | 12.212 h |
| December, selected | 32.1°C25.5°C | 25.5°C | 35 | 7.1 | 12.312 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
- Tianguá in DecemberBrazil · 127 kmHigh 30.0°C · Low 20.4°C · 32 mm rain
- Sobral in DecemberBrazil · 181 kmHigh 34.5°C · Low 24.5°C · 22 mm rain
- Chapadinha in DecemberBrazil · 199 kmHigh 33.8°C · Low 24.7°C · 63 mm rain
- Itapipoca in DecemberBrazil · 253 kmHigh 32.8°C · Low 24.6°C · 30 mm rain
- São José de Ribamar in DecemberBrazil · 257 kmHigh 29.3°C · Low 25.8°C · 75 mm rain
- Teresina in DecemberBrazil · 268 kmHigh 33.8°C · Low 24.2°C · 93 mm rain
- Caxias in DecemberBrazil · 279 kmHigh 33.1°C · Low 24.1°C · 103 mm rain
- Crateús in DecemberBrazil · 281 kmHigh 34.3°C · Low 23.6°C · 20 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 Parnaíba) is explained once on the Parnaíba year overview and on the Sources, method and limits page.