Average annual temperature is 26.8 °C
Absolute maximum temperature: 36.9 °C
Absolute minimum temperature: 18.5 °C
Number of sunny days: 74 days
Number of rainy days: 291 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) | 31.7 | 32.7 | 32.9 | 32.3 | 32.7 | 33.1 | 35.0 | 34.8 | 36.9 | 36.8 | 36.7 | 34.5 |
| Average daytime temperature (°C) | 28.8 | 29.6 | 29.8 | 30.1 | 30.2 | 30.4 | 33.2 | 32.7 | 34.2 | 34.8 | 33.5 | 32.1 |
| Average temperature (°C) | 25.1 | 25.5 | 25.6 | 25.9 | 26.3 | 26.0 | 27.3 | 27.5 | 28.4 | 28.8 | 28.2 | 27.1 |
| Average night temperature (°C) | 22.9 | 23.2 | 23.3 | 23.5 | 24.1 | 23.0 | 23.0 | 24.0 | 24.5 | 25.1 | 24.8 | 24.3 |
| Absolute minimum temperature (°C) | 22.2 | 22.0 | 22.4 | 22.6 | 23.2 | 18.5 | 21.7 | 22.5 | 22.8 | 23.1 | 23.5 | 23.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.5 | 12.3 | 12.1 | 12.0 | 11.8 | 11.7 | 11.8 | 11.9 | 12.1 | 12.3 | 12.4 | 12.5 |
| Daylight minimum duration (h) | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 |
| Sunshine mean duration (h) | 7.1 | 8.2 | 7.8 | 8.1 | 9.0 | 9.7 | 10.8 | 10.4 | 10.4 | 10.6 | 10.2 | 9.6 |
| Precipitation (mm) | 359 | 358 | 436 | 298 | 256 | 74 | 13 | 68 | 44 | 56 | 59 | 187 |
| Sunny days | 0 | 0 | 0 | 0 | 1 | 5 | 23 | 15 | 15 | 7 | 5 | 3 |
| Rainy days | 31 | 28 | 31 | 30 | 30 | 25 | 8 | 16 | 15 | 24 | 25 | 28 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Castanhal is at