Climate averages 1991–2020
Santarém weather
in October.
A hot, wet month: the warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a hot month in Santarém: daytime highs average 31.4°C and nights cool to about 26.5°C. By daytime temperature it is the warmest month of the year.
Expect about 107 mm of rain on roughly 12 days, which makes October a wet month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 10 min on an average October day.
The nearest other city in this atlas is Oriximiná (149 km away). In October its highs average 32.0°C, 0.6°C warmer than Santarém, with 100 mm of rain.
Among the 448 cities listed in Brazil, Santarém ranks joint 89th of 448 for the warmest October highs and joint 204th of 448 for the driest October (rainfall, lowest first). The mean October high of those 448 cities is 28.3°C; Santarém is 3.1°C warmer than that mean.
From October to November, average highs fall by 0.7°C to 30.7°C, and monthly rainfall rises from 107 mm to 149 mm.
The annual picture
October 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 | 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, selected | 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
October in nearby cities
- Oriximiná in OctoberBrazil · 149 kmHigh 32.0°C · Low 25.8°C · 100 mm rain
- Parintins in OctoberBrazil · 226 kmHigh 31.8°C · Low 25.1°C · 121 mm rain
- Itaituba in OctoberBrazil · 248 kmHigh 32.5°C · Low 24.3°C · 116 mm rain
- Altamira in OctoberBrazil · 290 kmHigh 33.0°C · Low 24.5°C · 60 mm rain
- Itacoatiara in OctoberBrazil · 422 kmHigh 31.2°C · Low 25.4°C · 140 mm rain
- Santana in OctoberBrazil · 475 kmHigh 32.3°C · Low 24.9°C · 18 mm rain
- Breves in OctoberBrazil · 477 kmHigh 33.8°C · Low 24.7°C · 33 mm rain
- Macapá in OctoberBrazil · 490 kmHigh 31.8°C · Low 25.0°C · 17 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.