Climate averages 1991–2020
São Luís weather
in July.
A hot, wet month: the 6th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in São Luís: daytime highs average 29.3°C and nights cool to about 24.7°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 103 mm of rain on roughly 20 days, which makes July a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 59 min on an average July day.
The nearest other city in this atlas is São José de Ribamar (27 km away). In July its highs average 29.1°C, about as warm as São Luís, with 94 mm of rain.
Among the 448 cities listed in Brazil, São Luís ranks joint 73rd of 448 for the warmest July highs and joint 378th of 448 for the driest July (rainfall, lowest first). The mean July high of those 448 cities is 24.7°C; São Luís is 4.6°C warmer than that mean.
From July to August, average highs rise by 1.2°C to 30.6°C, and monthly rainfall falls from 103 mm to 28 mm.
The annual picture
July 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 Luís climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.0°C24.7°C | 24.7°C | 221 | 25.4 | 12.212 h |
| February | 28.3°C24.4°C | 24.4°C | 305 | 26.3 | 12.212 h |
| March | 28.1°C24.2°C | 24.2°C | 440 | 30.3 | 12.112 h |
| April | 28.3°C24.3°C | 24.3°C | 414 | 28.8 | 12.112 h |
| May | 28.8°C24.6°C | 24.6°C | 286 | 26.9 | 12.012 h |
| June | 29.1°C24.7°C | 24.7°C | 153 | 23.0 | 12.012 h |
| July, selected | 29.3°C24.7°C | 24.7°C | 103 | 20.0 | 12.012 h |
| August | 30.6°C25.3°C | 25.3°C | 28 | 9.0 | 12.012 h |
| September | 31.2°C25.5°C | 25.5°C | 11 | 3.2 | 12.112 h |
| October | 31.2°C25.7°C | 25.7°C | 13 | 3.6 | 12.212 h |
| November | 30.9°C25.7°C | 25.7°C | 27 | 6.8 | 12.212 h |
| December | 30.4°C25.5°C | 25.5°C | 73 | 15.2 | 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
July in nearby cities
- São José de Ribamar in JulyBrazil · 27 kmHigh 29.1°C · Low 25.2°C · 94 mm rain
- Pinheiro in JulyBrazil · 87 kmHigh 29.7°C · Low 23.1°C · 76 mm rain
- Chapadinha in JulyBrazil · 171 kmHigh 31.8°C · Low 23.0°C · 23 mm rain
- Santa Inês in JulyBrazil · 174 kmHigh 31.2°C · Low 23.1°C · 32 mm rain
- Bacabal in JulyBrazil · 197 kmHigh 32.2°C · Low 23.4°C · 15 mm rain
- Codó in JulyBrazil · 219 kmHigh 32.5°C · Low 23.1°C · 10 mm rain
- Caxias in JulyBrazil · 279 kmHigh 33.3°C · Low 23.1°C · 10 mm rain
- Parnaíba in JulyBrazil · 284 kmHigh 32.2°C · Low 24.8°C · 16 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 Luís) is explained once on the São Luís year overview and on the Sources, method and limits page.