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When to go · Climate guide
Guamwhen to go
Guam's national averages run from 27 °C in February to 29 °C in November, with rainfall between 54 mm in March and 376 mm in September and 5.3–8.9 hours of sun a day. Against the default preferences (under 2.7 mm of rain a day, at least 6 hours of sun), the strongest months are January, February and March. Its 1 regions span 28–28 °C in annual mean temperature, so the national figure hides a good deal.
- Region
- Oceania
- Area
- 480 km²
Best months to visit
When Guam shines
Climate at a glance · 10-year ERA5
A decade of weather, in one page
— daytime high— overnight low▬ typical range
View data table
| Month | Average daytime high (°C) | Average overnight low (°C) | Typical low | Typical high |
|---|---|---|---|---|
| January | 27.4 | 26.3 | 25.4 | 28.3 |
| February | 27.2 | 26.1 | 25.1 | 27.8 |
| March | 27.3 | 26.2 | 25.3 | 27.9 |
| April | 27.7 | 26.5 | 25.7 | 28.4 |
| May | 28.2 | 26.8 | 25.9 | 28.8 |
| June | 28.5 | 26.8 | 25.9 | 29.0 |
| July | 28.5 | 26.6 | 25.9 | 29.1 |
| August | 28.5 | 26.6 | 25.8 | 29.3 |
| September | 28.4 | 26.5 | 25.8 | 29.2 |
| October | 28.4 | 26.6 | 25.9 | 29.1 |
| November | 28.5 | 27.0 | 26.2 | 29.0 |
| December | 28.2 | 26.8 | 26.1 | 28.7 |
View data table
| Month | Rainfall (mm) |
|---|---|
| January | 79 |
| February | 68 |
| March | 54 |
| April | 92 |
| May | 109 |
| June | 166 |
| July | 282 |
| August | 367 |
| September | 376 |
| October | 369 |
| November | 194 |
| December | 112 |
View data table
| Month | Sunshine hours (hr / day) |
|---|---|
| January | 7.9 |
| February | 8.3 |
| March | 8.9 |
| April | 8.7 |
| May | 8.6 |
| June | 7.7 |
| July | 6.1 |
| August | 5.3 |
| September | 5.5 |
| October | 5.7 |
| November | 7.3 |
| December | 7.8 |
— average▬ typical range
View data table
| Month | Average wind speed (km/h) | Typical low | Typical high |
|---|---|---|---|
| January | 30.0 | 17.7 | 40.9 |
| February | 31.8 | 22.0 | 40.8 |
| March | 26.6 | 14.3 | 36.4 |
| April | 26.0 | 14.7 | 34.8 |
| May | 23.5 | 11.9 | 32.4 |
| June | 21.1 | 11.5 | 29.5 |
| July | 19.6 | 9.3 | 29.3 |
| August | 17.9 | 6.0 | 36.4 |
| September | 17.6 | 7.4 | 30.8 |
| October | 20.6 | 8.9 | 31.8 |
| November | 26.9 | 15.7 | 36.2 |
| December | 30.3 | 20.2 | 40.2 |
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1 regions
Guam, taken apart
Safety · 1 government
What one government says about Guam
Combined advisory · most-cautious-wins
Exercise normal precautions
Highest level across 1 government · Advisory last changed
See breakdown by countryHide breakdown
Month by month
A year in Guam, in order
- JanJanuary27.4°C · 79 mm · 7.9 hr/day
Around 27 °C with 78 mm of rain and 7.9 hours of sun a day.
Around 27 °C with 78 mm of rain and 7.9 hours of sun a day.
- FebFebruary27.2°C · 68 mm · 8.3 hr/day
Around 27 °C with 68 mm of rain and 8.3 hours of sun a day.
Around 27 °C with 68 mm of rain and 8.3 hours of sun a day.
- MarMarch27.3°C · 54 mm · 8.9 hr/day
Around 27 °C with 54 mm of rain and 8.9 hours of sun a day.
Around 27 °C with 54 mm of rain and 8.9 hours of sun a day.
- AprApril27.7°C · 92 mm · 8.7 hr/day
Around 28 °C with 92 mm of rain and 8.7 hours of sun a day.
Around 28 °C with 92 mm of rain and 8.7 hours of sun a day.
- MayMay28.2°C · 109 mm · 8.6 hr/day
Around 28 °C with 109 mm of rain and 8.6 hours of sun a day.
Around 28 °C with 109 mm of rain and 8.6 hours of sun a day.
- JunJune28.5°C · 166 mm · 7.7 hr/day
Around 28 °C with 166 mm of rain and 7.7 hours of sun a day.
Around 28 °C with 166 mm of rain and 7.7 hours of sun a day.
- JulJuly28.5°C · 282 mm · 6.1 hr/day
Around 28 °C with 282 mm of rain and 6.1 hours of sun a day.
Around 28 °C with 282 mm of rain and 6.1 hours of sun a day.
- AugAugust28.5°C · 367 mm · 5.3 hr/day
Around 28 °C with 367 mm of rain and 5.3 hours of sun a day.
Around 28 °C with 367 mm of rain and 5.3 hours of sun a day.
- SepSeptember28.4°C · 376 mm · 5.5 hr/day
Around 28 °C with 376 mm of rain and 5.5 hours of sun a day.
Around 28 °C with 376 mm of rain and 5.5 hours of sun a day.
- OctOctober28.4°C · 369 mm · 5.7 hr/day
Around 28 °C with 369 mm of rain and 5.7 hours of sun a day.
Around 28 °C with 369 mm of rain and 5.7 hours of sun a day.
- NovNovember28.5°C · 194 mm · 7.3 hr/day
Around 29 °C with 194 mm of rain and 7.3 hours of sun a day.
Around 29 °C with 194 mm of rain and 7.3 hours of sun a day.
- DecDecember28.2°C · 112 mm · 7.8 hr/day
Around 28 °C with 112 mm of rain and 7.8 hours of sun a day.
Around 28 °C with 112 mm of rain and 7.8 hours of sun a day.
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