Guam weather in May
May is one of the best months to visit Guam: highs of 29°C (84°F) and about 62 mm (2.4 in) of rain on average. Nights average 28°C (82°F) and cloud cover 52% (NASA POWER, 2001–2025 averages). It is the 4th driest month of the year and the 4th warmest. Compared with April, it is about as warm and wetter; June brings highs of 29°C (84°F) and 97 mm (3.8 in) of rain.
Is May a good time to visit Guam?
best month Weather score 79/100.
Yes. May is one of the best months for weather in Guam.
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Does it rain a lot in Guam in May?
Some rain is normal: about 62 mm (2.4 in) falls in an average May. It is the 4th driest month of the year.
How warm is Guam in May?
Days average 29°C (84°F) and nights 28°C (82°F).
Guam weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 28°C (82°F) | 27°C (81°F) | 82 mm | 64% | best |
| February | 28°C (82°F) | 27°C (80°F) | 51 mm | 61% | best |
| March | 28°C (82°F) | 27°C (80°F) | 42 mm | 57% | best |
| April | 28°C (83°F) | 27°C (81°F) | 47 mm | 49% | best |
| May | 29°C (84°F) | 28°C (82°F) | 62 mm | 52% | best |
| June | 29°C (84°F) | 28°C (83°F) | 97 mm | 56% | best |
| July | 29°C (84°F) | 28°C (83°F) | 197 mm | 77% | fair |
| August | 29°C (84°F) | 28°C (82°F) | 315 mm | 86% | least pleasant |
| September | 29°C (84°F) | 28°C (82°F) | 278 mm | 85% | least pleasant |
| October | 29°C (84°F) | 28°C (83°F) | 231 mm | 73% | least pleasant |
| November | 29°C (84°F) | 28°C (83°F) | 136 mm | 55% | fair |
| December | 29°C (83°F) | 28°C (82°F) | 69 mm | 55% | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
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