Climate averages 1991–2020
Hagåtña weather
in May.
A hot, moderately wet month: the joint 2nd warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Hagåtña: daytime highs average 28.4°C and nights cool to about 26.4°C. By daytime temperature it is the joint 2nd warmest of the 12 months.
Expect about 81 mm of rain on roughly 15 days, which makes May a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 45 min on an average May day.
The nearest other city in this atlas is Saipan (221 km away). In May its highs average 27.7°C, 0.7°C cooler than Hagåtña, with 64 mm of rain.
From May to June, average highs rise by 0.2°C to 28.6°C, and monthly rainfall rises from 81 mm to 140 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Hagåtña climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.3°C25.8°C | 25.8°C | 71 | 14.7 | 11.411 h |
| February | 27.1°C25.6°C | 25.6°C | 52 | 11.5 | 11.712 h |
| March | 27.4°C25.7°C | 25.7°C | 45 | 10.2 | 12.012 h |
| April | 27.9°C26.1°C | 26.1°C | 67 | 11.1 | 12.412 h |
| May, selected | 28.4°C26.4°C | 26.4°C | 81 | 15.0 | 12.713 h |
| June | 28.6°C26.5°C | 26.5°C | 140 | 20.4 | 12.913 h |
| July | 28.4°C26.2°C | 26.2°C | 272 | 28.4 | 12.813 h |
| August | 28.3°C26.1°C | 26.1°C | 350 | 29.2 | 12.613 h |
| September | 28.3°C26.1°C | 26.1°C | 314 | 27.2 | 12.212 h |
| October | 28.3°C26.1°C | 26.1°C | 279 | 27.5 | 11.812 h |
| November | 28.3°C26.5°C | 26.5°C | 175 | 21.5 | 11.512 h |
| December | 27.9°C26.3°C | 26.3°C | 93 | 16.8 | 11.311 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Hagåtña) is explained once on the Hagåtña year overview and on the Sources, method and limits page.