Average annual temperature is 27.2 °C
Absolute maximum temperature: 32.7 °C
Absolute minimum temperature: 21.8 °C
Number of sunny days: 18 days
Number of rainy days: 347 days
Look at detailed online map of Blenheim
* Weather data for Blenheim Guyana is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 28.7 | 28.9 | 29.6 | 30.4 | 31.2 | 31.5 | 30.9 | 31.7 | 32.6 | 32.7 | 31.5 | 30.6 |
| Average daytime temperature (°C) | 27.5 | 28.0 | 28.7 | 29.2 | 29.2 | 29.7 | 30.1 | 31.0 | 31.6 | 31.8 | 30.5 | 29.7 |
| Average temperature (°C) | 25.2 | 25.8 | 26.5 | 26.7 | 26.7 | 26.8 | 27.2 | 27.9 | 28.8 | 29.0 | 28.1 | 27.2 |
| Average night temperature (°C) | 23.1 | 23.8 | 24.9 | 24.9 | 24.5 | 24.2 | 24.4 | 25.4 | 26.8 | 27.1 | 26.3 | 25.1 |
| Absolute minimum temperature (°C) | 21.9 | 21.8 | 22.7 | 23.1 | 23.3 | 22.6 | 23.0 | 23.0 | 23.8 | 24.7 | 23.1 | 22.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.8 | 11.9 | 12.1 | 12.3 | 12.4 | 12.5 | 12.5 | 12.3 | 12.2 | 12.0 | 11.8 | 11.7 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 9.0 | 9.3 | 10.7 | 10.0 | 8.9 | 10.2 | 11.0 | 11.0 | 11.2 | 10.9 | 10.5 | 10.4 |
| Precipitation (mm) | 271 | 214 | 69 | 142 | 314 | 400 | 202 | 138 | 47 | 44 | 102 | 133 |
| Sunny days | 1 | 2 | 3 | 2 | 0 | 0 | 0 | 3 | 5 | 1 | 0 | 1 |
| Rainy days | 30 | 26 | 28 | 28 | 31 | 30 | 31 | 28 | 25 | 30 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Blenheim is at