Average annual temperature is 12.0 °C
Absolute maximum temperature: 33.1 °C
Absolute minimum temperature: -18.7 °C
Number of sunny days: 191 days
Number of rainy days: 158 days
Number of snow days: 16 days
Look at detailed online map of Guam
* Weather data for Guam South Korea is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 10.8 | 12.1 | 21.5 | 22.5 | 30.0 | 32.0 | 31.5 | 33.1 | 28.7 | 20.2 | 23.3 | 14.7 |
| Average daytime temperature (°C) | 1.3 | 6.0 | 14.4 | 16.8 | 21.9 | 26.2 | 27.6 | 28.6 | 24.7 | 17.7 | 9.4 | 3.2 |
| Average temperature (°C) | -2.7 | 0.9 | 8.3 | 11.2 | 17.0 | 21.3 | 23.9 | 24.7 | 20.7 | 13.0 | 4.8 | -0.2 |
| Average night temperature (°C) | -6.4 | -2.5 | 3.3 | 6.3 | 12.3 | 17.1 | 21.1 | 21.5 | 17.4 | 9.2 | 0.7 | -3.3 |
| Absolute minimum temperature (°C) | -18.7 | -7.6 | -5.3 | -0.1 | 5.4 | 13.4 | 16.8 | 16.6 | 11.8 | 2.4 | -9.8 | -15.7 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 14.0 | 14.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.0 | 10.8 | 12.0 | 13.1 | 14.1 | 14.6 | 14.4 | 13.5 | 12.4 | 11.3 | 10.2 | 9.7 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 14.0 | 13.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.3 | 7.9 | 9.2 | 8.4 | 8.7 | 10.0 | 7.6 | 8.9 | 7.7 | 8.7 | 7.5 | 6.1 |
| Precipitation (mm) | 36 | 10 | 32 | 90 | 129 | 211 | 556 | 344 | 256 | 24 | 58 | 89 |
| Sunny days | 19 | 22 | 21 | 15 | 18 | 11 | 3 | 9 | 12 | 25 | 17 | 19 |
| Rainy days | 4 | 5 | 10 | 15 | 13 | 19 | 28 | 22 | 18 | 6 | 11 | 7 |
| Snow days | 8 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 5 |
The largest precipitation sum in Guam is at