Average annual temperature is 26.7 °C
Absolute maximum temperature: 38.1 °C
Absolute minimum temperature: 21.6 °C
Number of sunny days: 34 days
Number of rainy days: 331 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) | 32.9 | 31.5 | 31.8 | 32.4 | 32.5 | 33.0 | 34.2 | 34.9 | 38.1 | 36.6 | 36.4 | 33.8 |
| Average daytime temperature (°C) | 30.3 | 29.7 | 29.3 | 30.2 | 30.6 | 30.9 | 32.5 | 33.7 | 34.6 | 35.2 | 34.4 | 32.6 |
| Average temperature (°C) | 25.4 | 25.0 | 24.9 | 25.4 | 26.0 | 26.2 | 27.1 | 28.0 | 28.4 | 28.7 | 28.3 | 27.2 |
| Average night temperature (°C) | 22.5 | 22.7 | 22.6 | 22.8 | 23.3 | 23.0 | 23.0 | 23.3 | 23.6 | 23.9 | 24.1 | 23.9 |
| Absolute minimum temperature (°C) | 21.6 | 21.8 | 21.6 | 21.9 | 22.2 | 22.4 | 21.9 | 22.2 | 22.9 | 22.8 | 22.4 | 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 | 12.1 | 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) | 8.7 | 6.5 | 6.3 | 7.5 | 8.9 | 10.5 | 10.9 | 11.2 | 11.2 | 11.0 | 10.3 | 9.5 |
| Precipitation (mm) | 298 | 427 | 542 | 464 | 301 | 145 | 75 | 20 | 27 | 37 | 58 | 156 |
| Sunny days | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 12 | 8 | 7 | 5 | 0 |
| Rainy days | 31 | 28 | 31 | 30 | 31 | 30 | 29 | 19 | 22 | 24 | 25 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Castanhal is at