Average annual temperature is 26.5 °C
Absolute maximum temperature: 36.6 °C
Absolute minimum temperature: 21.3 °C
Number of sunny days: 28 days
Number of rainy days: 337 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) | 32.5 | 31.9 | 31.7 | 31.9 | 31.9 | 31.9 | 33.0 | 34.0 | 36.6 | 35.9 | 35.4 | 33.7 |
| Average daytime temperature (°C) | 30.1 | 29.6 | 29.1 | 30.3 | 30.6 | 30.8 | 31.7 | 33.0 | 33.8 | 34.6 | 34.0 | 32.2 |
| Average temperature (°C) | 25.2 | 24.9 | 24.8 | 25.2 | 25.7 | 25.9 | 26.5 | 27.4 | 27.9 | 28.5 | 28.3 | 27.1 |
| Average night temperature (°C) | 22.3 | 22.5 | 22.4 | 22.5 | 23.0 | 22.6 | 22.8 | 23.0 | 23.4 | 23.8 | 24.1 | 23.8 |
| Absolute minimum temperature (°C) | 21.4 | 21.5 | 21.5 | 21.8 | 21.7 | 21.6 | 21.3 | 22.4 | 22.0 | 22.7 | 22.8 | 21.9 |
| 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 | 12.1 | 12.0 | 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) | 8.1 | 6.4 | 6.4 | 8.2 | 8.8 | 10.5 | 10.9 | 11.3 | 11.3 | 10.9 | 10.3 | 9.6 |
| Precipitation (mm) | 344 | 410 | 520 | 409 | 268 | 146 | 70 | 16 | 24 | 37 | 60 | 123 |
| Sunny days | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 6 | 7 | 8 | 4 | 0 |
| Rainy days | 30 | 28 | 31 | 30 | 31 | 30 | 29 | 25 | 23 | 23 | 26 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Castanhal is at