Climate averages 1991–2020
Parnaíba weather
in March.
A hot, very wet month: the coolest and the 11th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
March is a hot month in Parnaíba: daytime highs average 29.1°C and nights cool to about 24.6°C. By daytime temperature it is the coolest month of the year.
Expect about 265 mm of rain on roughly 28 days, which makes March a very wet month (the 11th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 08 min on an average March day.
The nearest other city in this atlas is Tianguá (127 km away). In March its highs average 26.7°C, 2.4°C cooler than Parnaíba, with 239 mm of rain.
Among the 448 cities listed in Brazil, Parnaíba ranks joint 127th of 448 for the warmest March highs and 396th of 448 for the driest March (rainfall, lowest first). The mean March high of those 448 cities is 27.9°C; Parnaíba is 1.2°C warmer than that mean.
From March to April, average highs rise by 0.1°C to 29.2°C, and monthly rainfall rises from 265 mm to 268 mm.
The annual picture
March 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, selected | 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 | 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
March in nearby cities
- Tianguá in MarchBrazil · 127 kmHigh 26.7°C · Low 19.9°C · 239 mm rain
- Sobral in MarchBrazil · 181 kmHigh 30.6°C · Low 23.5°C · 177 mm rain
- Chapadinha in MarchBrazil · 199 kmHigh 29.7°C · Low 22.9°C · 300 mm rain
- Itapipoca in MarchBrazil · 253 kmHigh 30.0°C · Low 23.7°C · 228 mm rain
- São José de Ribamar in MarchBrazil · 257 kmHigh 27.9°C · Low 24.6°C · 452 mm rain
- Teresina in MarchBrazil · 268 kmHigh 29.9°C · Low 22.9°C · 328 mm rain
- Caxias in MarchBrazil · 279 kmHigh 29.6°C · Low 22.8°C · 345 mm rain
- Crateús in MarchBrazil · 281 kmHigh 30.8°C · Low 22.3°C · 134 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.