Weather in Guam: January
 |
Average day temperature: | 83.9°F |
| Average night temperature: | 80.7°F | |
 |
Sea water temperature: | 82.8°F |
 |
Number of sunny days: | 3 days |
| Day length: | 11.3 - 11.5 hours | |
 |
Number of rainy days: | 5 days |
| Precipitation totals: | 2.7 in. | |
| more information | ||
forecast
| Guam |
temperature
| Guam |
Air temperature in January, °F
| Day temperature | Night temperature |
The highest day temperature during January of 2025 was 84°F. At the same time the lowest night temperature was 78°F. Daily and nightly averages during January were 82.5°F and 80.3°F.
Sea water temperature in Guam in January, °F
The average sea water temperature in January of 2025 was 83.4°F. The highest and lowest sea temperatures during the month were 83.8°F and 82.9°F.
| Sunny days | |
| Partly cloudy days | |
| Cloudy days |
Mostly all days in January are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in January, in.
Precipitation total value in Guam in January is 2.5 in. Other months of the year show relatively similar values.
The average wind speed value in January is 16.4 mph It makes January one of the most windy months of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in January is: 4.8.
Best time for vacation in Guam
Guam on a weather map
19 mph
17 mph
17 mph
18 mph
17 mph
14 mph
15 mph
15 mph
