Average annual temperature is 26.4 °C
Absolute maximum temperature: 36.9 °C
Absolute minimum temperature: 20.7 °C
Number of sunny days: 46 days
Number of rainy days: 319 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) | 33.3 | 32.3 | 32.5 | 32.8 | 32.4 | 32.8 | 33.9 | 34.4 | 36.9 | 36.6 | 35.9 | 34.0 |
| Average daytime temperature (°C) | 30.5 | 29.9 | 29.2 | 30.3 | 30.6 | 31.1 | 32.4 | 33.4 | 34.4 | 34.8 | 34.2 | 32.6 |
| Average temperature (°C) | 25.1 | 24.7 | 24.6 | 25.0 | 25.6 | 25.9 | 26.8 | 27.6 | 28.0 | 28.4 | 28.0 | 26.9 |
| Average night temperature (°C) | 22.1 | 22.3 | 22.3 | 22.4 | 22.9 | 22.6 | 22.5 | 22.7 | 23.1 | 23.4 | 23.6 | 23.6 |
| Absolute minimum temperature (°C) | 21.3 | 21.6 | 20.7 | 21.8 | 22.2 | 21.3 | 21.1 | 21.5 | 22.1 | 22.2 | 23.0 | 22.2 |
| 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 | 12.2 | 12.1 | 12.1 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.2 | 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 | 6.9 | 6.5 | 7.8 | 8.9 | 10.7 | 11.1 | 11.2 | 11.2 | 11.1 | 10.5 | 9.5 |
| Precipitation (mm) | 366 | 444 | 568 | 502 | 260 | 113 | 68 | 14 | 16 | 28 | 56 | 147 |
| Sunny days | 1 | 0 | 0 | 0 | 0 | 1 | 6 | 9 | 12 | 11 | 5 | 1 |
| Rainy days | 30 | 28 | 31 | 30 | 31 | 29 | 25 | 22 | 18 | 20 | 25 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Castanhal is at