Average annual temperature is 26.4 °C
Absolute maximum temperature: 36.7 °C
Absolute minimum temperature: 21.4 °C
Number of sunny days: 7 days
Number of rainy days: 358 days
Look at detailed online map of Castanhal
* Weather data for Castanhal Brazil is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 32.2 | 31.6 | 31.5 | 32.0 | 32.0 | 32.3 | 33.4 | 34.4 | 36.2 | 36.7 | 35.0 | 33.9 |
| Average daytime temperature (°C) | 29.3 | 29.0 | 28.6 | 29.7 | 30.3 | 30.8 | 32.0 | 32.9 | 33.6 | 34.4 | 33.4 | 31.8 |
| Average temperature (°C) | 25.1 | 24.9 | 25.0 | 25.4 | 25.9 | 26.1 | 26.5 | 27.2 | 27.7 | 28.3 | 27.9 | 27.1 |
| Average night temperature (°C) | 22.6 | 22.8 | 22.9 | 23.1 | 23.5 | 23.2 | 22.8 | 23.0 | 23.4 | 23.8 | 24.0 | 23.8 |
| Absolute minimum temperature (°C) | 21.4 | 21.4 | 21.7 | 22.4 | 22.2 | 22.3 | 21.8 | 22.3 | 21.9 | 22.5 | 23.0 | 22.3 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.2 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 8.6 | 7.4 | 7.1 | 8.8 | 9.4 | 10.8 | 11.0 | 11.2 | 11.4 | 11.3 | 10.4 | 10.0 |
| Precipitation (mm) | 310 | 468 | 535 | 385 | 270 | 156 | 86 | 55 | 60 | 91 | 108 | 165 |
| Sunny days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 3 | 1 | 0 | 0 |
| Rainy days | 31 | 28 | 31 | 30 | 31 | 30 | 31 | 28 | 27 | 30 | 30 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Castanhal is at