Climate averages 1991–2020
São José de Ribamar weather
in May.
A hot, very wet month: the 8th 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 São José de Ribamar: daytime highs average 28.6°C and nights cool to about 25.0°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 292 mm of rain on roughly 27 days, which makes May a very wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 00 min on an average May day.
The nearest other city in this atlas is São Luís (27 km away). In May its highs average 28.8°C, about as warm as São José de Ribamar, with 286 mm of rain.
Among the 448 cities listed in Brazil, São José de Ribamar ranks joint 91st of 448 for the warmest May highs and joint 435th of 448 for the driest May (rainfall, lowest first). The mean May high of those 448 cities is 25.3°C; São José de Ribamar is 3.3°C warmer than that mean.
From May to June, average highs rise by 0.3°C to 28.9°C, and monthly rainfall falls from 292 mm to 146 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
São José de Ribamar climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.4°C25.0°C | 25.0°C | 229 | 25.4 | 12.212 h |
| February | 28.0°C24.7°C | 24.7°C | 319 | 26.2 | 12.212 h |
| March | 27.9°C24.6°C | 24.6°C | 452 | 30.2 | 12.112 h |
| April | 28.1°C24.6°C | 24.6°C | 437 | 28.7 | 12.112 h |
| May, selected | 28.6°C25.0°C | 25.0°C | 292 | 26.5 | 12.012 h |
| June | 28.9°C25.1°C | 25.1°C | 146 | 21.8 | 12.012 h |
| July | 29.1°C25.2°C | 25.2°C | 94 | 18.4 | 12.012 h |
| August | 29.8°C25.6°C | 25.6°C | 25 | 7.5 | 12.012 h |
| September | 30.1°C25.8°C | 25.8°C | 11 | 2.8 | 12.112 h |
| October | 30.0°C25.9°C | 25.9°C | 15 | 3.7 | 12.212 h |
| November | 29.7°C26.0°C | 26.0°C | 28 | 6.3 | 12.212 h |
| December | 29.3°C25.8°C | 25.8°C | 75 | 15.0 | 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
- São Luís in MayBrazil · 27 kmHigh 28.8°C · Low 24.6°C · 286 mm rain
- Pinheiro in MayBrazil · 114 kmHigh 29.5°C · Low 23.5°C · 248 mm rain
- Chapadinha in MayBrazil · 153 kmHigh 29.9°C · Low 23.0°C · 175 mm rain
- Santa Inês in MayBrazil · 192 kmHigh 29.8°C · Low 23.5°C · 163 mm rain
- Bacabal in MayBrazil · 203 kmHigh 30.0°C · Low 23.5°C · 130 mm rain
- Codó in MayBrazil · 212 kmHigh 30.0°C · Low 23.1°C · 121 mm rain
- Parnaíba in MayBrazil · 257 kmHigh 30.0°C · Low 24.9°C · 148 mm rain
- Caxias in MayBrazil · 268 kmHigh 30.5°C · Low 23.0°C · 128 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 São José de Ribamar) is explained once on the São José de Ribamar year overview and on the Sources, method and limits page.