Climate averages 1991–2020
Santarém weather
in May.
A hot, very wet month: the joint 9th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Santarém: daytime highs average 28.3°C and nights cool to about 24.6°C. By daytime temperature it is the joint 9th warmest of the 12 months.
Expect about 365 mm of rain on roughly 30 days, which makes May a very wet month (the 8th 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 Oriximiná (149 km away). In May its highs average 28.7°C, about as warm as Santarém, with 272 mm of rain.
Among the 448 cities listed in Brazil, Santarém ranks joint 103rd of 448 for the warmest May highs and 447th of 448 for the driest May (rainfall, lowest first). The mean May high of those 448 cities is 25.3°C; Santarém is 3.0°C warmer than that mean.
From May to June, average highs rise by 0.2°C to 28.5°C, and monthly rainfall falls from 365 mm to 187 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
Santarém climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.6°C24.7°C | 24.7°C | 409 | 28.2 | 12.212 h |
| February | 28.3°C24.5°C | 24.5°C | 391 | 26.1 | 12.212 h |
| March | 28.3°C24.5°C | 24.5°C | 488 | 29.3 | 12.112 h |
| April | 28.2°C24.5°C | 24.5°C | 450 | 29.2 | 12.112 h |
| May, selected | 28.3°C24.6°C | 24.6°C | 365 | 29.6 | 12.012 h |
| June | 28.5°C24.8°C | 24.8°C | 187 | 24.8 | 12.012 h |
| July | 28.9°C25.0°C | 25.0°C | 114 | 19.2 | 12.012 h |
| August | 30.2°C25.7°C | 25.7°C | 74 | 13.0 | 12.012 h |
| September | 31.2°C26.2°C | 26.2°C | 68 | 10.5 | 12.112 h |
| October | 31.4°C26.5°C | 26.5°C | 107 | 11.9 | 12.212 h |
| November | 30.7°C26.2°C | 26.2°C | 149 | 16.6 | 12.212 h |
| December | 29.9°C25.7°C | 25.7°C | 233 | 21.7 | 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
- Oriximiná in MayBrazil · 149 kmHigh 28.7°C · Low 24.0°C · 272 mm rain
- Parintins in MayBrazil · 226 kmHigh 29.0°C · Low 23.7°C · 292 mm rain
- Itaituba in MayBrazil · 248 kmHigh 29.1°C · Low 23.4°C · 203 mm rain
- Altamira in MayBrazil · 290 kmHigh 28.8°C · Low 23.1°C · 190 mm rain
- Itacoatiara in MayBrazil · 422 kmHigh 28.7°C · Low 24.3°C · 277 mm rain
- Santana in MayBrazil · 475 kmHigh 28.6°C · Low 23.6°C · 324 mm rain
- Breves in MayBrazil · 477 kmHigh 29.2°C · Low 23.6°C · 286 mm rain
- Macapá in MayBrazil · 490 kmHigh 28.4°C · Low 23.6°C · 357 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 Santarém) is explained once on the Santarém year overview and on the Sources, method and limits page.