Climate averages 1991–2020
Parnaíba weather
in May.
A hot, wet month: the 9th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Parnaíba: daytime highs average 30.0°C and nights cool to about 24.9°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 148 mm of rain on roughly 18 days, which makes May a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 59 min on an average May day.
The nearest other city in this atlas is Tianguá (127 km away). In May its highs average 26.8°C, 3.2°C cooler than Parnaíba, with 96 mm of rain.
Among the 448 cities listed in Brazil, Parnaíba ranks joint 29th of 448 for the warmest May highs and joint 394th of 448 for the driest May (rainfall, lowest first). The mean May high of those 448 cities is 25.3°C; Parnaíba is 4.7°C warmer than that mean.
From May to June, average highs rise by 1.1°C to 31.0°C, and monthly rainfall falls from 148 mm to 31 mm.
The annual picture
May 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, selected | 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
May in nearby cities
- Tianguá in MayBrazil · 127 kmHigh 26.8°C · Low 19.7°C · 96 mm rain
- Sobral in MayBrazil · 181 kmHigh 31.0°C · Low 23.2°C · 82 mm rain
- Chapadinha in MayBrazil · 199 kmHigh 29.9°C · Low 23.0°C · 175 mm rain
- Itapipoca in MayBrazil · 253 kmHigh 30.2°C · Low 23.6°C · 109 mm rain
- São José de Ribamar in MayBrazil · 257 kmHigh 28.6°C · Low 25.0°C · 292 mm rain
- Teresina in MayBrazil · 268 kmHigh 30.9°C · Low 23.1°C · 124 mm rain
- Caxias in MayBrazil · 279 kmHigh 30.5°C · Low 23.0°C · 128 mm rain
- Crateús in MayBrazil · 281 kmHigh 30.5°C · Low 21.8°C · 44 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.