Average annual temperature is 13.4 °C
Absolute maximum temperature: 34.1 °C
Absolute minimum temperature: -15.4 °C
Number of sunny days: 159 days
Number of rainy days: 189 days
Number of snow days: 17 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) | 15.0 | 13.0 | 22.9 | 25.1 | 30.0 | 33.3 | 32.2 | 34.1 | 30.5 | 22.2 | 24.0 | 17.7 |
| Average daytime temperature (°C) | 3.9 | 7.2 | 15.4 | 17.8 | 22.7 | 27.1 | 28.6 | 29.9 | 26.3 | 19.4 | 11.5 | 6.2 |
| Average temperature (°C) | -0.6 | 1.8 | 8.8 | 12.5 | 17.7 | 21.8 | 25.0 | 25.9 | 22.3 | 14.9 | 7.3 | 2.9 |
| Average night temperature (°C) | -4.6 | -1.9 | 4.0 | 8.1 | 13.6 | 18.1 | 22.6 | 22.8 | 19.4 | 10.9 | 3.3 | -0.3 |
| Absolute minimum temperature (°C) | -15.4 | -6.8 | -2.6 | 1.9 | 7.1 | 13.9 | 19.5 | 18.4 | 14.8 | 6.0 | -6.0 | -11.5 |
| 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 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 |
| Daylight mean duration (h) | 10.1 | 10.9 | 12.0 | 13.1 | 14.0 | 14.5 | 14.3 | 13.5 | 12.4 | 11.3 | 10.3 | 9.8 |
| Daylight minimum duration (h) | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 13.0 | 12.0 | 11.0 | 10.0 | 9.0 | 9.0 |
| Sunshine mean duration (h) | 7.1 | 7.2 | 8.8 | 7.6 | 7.9 | 9.2 | 6.7 | 9.8 | 7.8 | 8.7 | 7.1 | 5.6 |
| Precipitation (mm) | 44 | 14 | 50 | 89 | 162 | 176 | 530 | 367 | 182 | 13 | 104 | 108 |
| Sunny days | 17 | 20 | 23 | 14 | 11 | 14 | 1 | 3 | 9 | 20 | 15 | 12 |
| Rainy days | 7 | 7 | 8 | 16 | 20 | 16 | 30 | 28 | 21 | 11 | 14 | 11 |
| Snow days | 7 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 8 |
The best time to visit Guam during the most sunny months:
The largest precipitation sum in Guam is at