Average annual temperature is 27.4 °C
Absolute maximum temperature: 36.1 °C
Absolute minimum temperature: 21.9 °C
Number of sunny days: 63 days
Number of rainy days: 302 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) | 31.1 | 31.5 | 32.4 | 32.0 | 31.9 | 32.2 | 33.7 | 34.5 | 35.5 | 35.9 | 36.1 | 33.6 |
| Average daytime temperature (°C) | 28.5 | 29.0 | 29.9 | 29.9 | 30.3 | 30.7 | 31.7 | 32.7 | 33.6 | 34.5 | 33.7 | 31.2 |
| Average temperature (°C) | 25.2 | 25.7 | 26.2 | 26.3 | 26.6 | 26.8 | 27.5 | 28.5 | 29.1 | 29.7 | 29.2 | 27.6 |
| Average night temperature (°C) | 22.8 | 23.2 | 23.6 | 23.8 | 24.1 | 23.9 | 24.4 | 25.0 | 25.6 | 26.1 | 25.7 | 24.8 |
| Absolute minimum temperature (°C) | 22.0 | 22.2 | 22.6 | 22.7 | 23.2 | 21.9 | 23.1 | 22.2 | 23.7 | 24.1 | 23.3 | 23.8 |
| 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 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 |
| Daylight mean duration (h) | 12.3 | 12.2 | 12.1 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.2 | 12.2 | 12.3 |
| Daylight minimum 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 |
| Sunshine mean duration (h) | 7.4 | 7.6 | 8.2 | 8.5 | 9.5 | 10.5 | 11.0 | 11.2 | 10.7 | 10.6 | 9.9 | 8.7 |
| Precipitation (mm) | 415 | 361 | 239 | 257 | 237 | 80 | 72 | 61 | 31 | 49 | 83 | 201 |
| Sunny days | 0 | 0 | 1 | 0 | 0 | 1 | 3 | 9 | 18 | 17 | 14 | 0 |
| Rainy days | 31 | 28 | 30 | 30 | 31 | 29 | 28 | 22 | 12 | 14 | 16 | 31 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Castanhal is at