Average annual temperature is 27.8 °C
Absolute maximum temperature: 37.9 °C
Absolute minimum temperature: 20.9 °C
Number of sunny days: 135 days
Number of rainy days: 230 days
Look at detailed online map of Lethem
* Weather data for Lethem 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) | 33.1 | 34.1 | 36.2 | 36.4 | 33.4 | 32.2 | 31.7 | 34.8 | 37.9 | 37.7 | 37.3 | 36.6 |
| Average daytime temperature (°C) | 30.8 | 31.6 | 34.0 | 32.6 | 30.7 | 29.7 | 29.6 | 32.4 | 35.2 | 35.8 | 35.9 | 34.8 |
| Average temperature (°C) | 25.9 | 26.6 | 28.3 | 27.5 | 26.4 | 25.7 | 25.7 | 27.6 | 29.7 | 30.1 | 30.5 | 29.5 |
| Average night temperature (°C) | 22.2 | 22.8 | 23.4 | 23.4 | 23.4 | 22.8 | 22.8 | 23.6 | 25.0 | 25.4 | 25.5 | 24.9 |
| Absolute minimum temperature (°C) | 20.9 | 22.0 | 22.1 | 21.8 | 22.4 | 21.6 | 21.8 | 22.1 | 22.6 | 23.2 | 23.9 | 23.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.9 | 12.0 | 12.1 | 12.2 | 12.3 | 12.3 | 12.3 | 12.2 | 12.1 | 12.0 | 12.0 | 11.9 |
| Daylight minimum 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 |
| Sunshine mean duration (h) | 10.1 | 9.9 | 10.6 | 9.2 | 9.0 | 10.0 | 10.1 | 11.0 | 11.2 | 11.0 | 10.9 | 10.7 |
| Precipitation (mm) | 99 | 82 | 15 | 164 | 212 | 261 | 244 | 57 | 36 | 22 | 5 | 14 |
| Sunny days | 9 | 6 | 20 | 13 | 3 | 1 | 0 | 12 | 21 | 18 | 18 | 14 |
| Rainy days | 22 | 22 | 11 | 17 | 28 | 29 | 31 | 19 | 9 | 13 | 12 | 17 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Lethem is at