Weather in Guam in March 2026
Average weather
Average temperature in Guam in March
The temperature in March is +30°C on average, with a range between a maximum of +31°C during the day and a minimum of +23°C at night.
The average maximum temperature goes up 38% by the end of the month, compared with the beginning of the month, from +28°C to +31°C.
Is Guam warm or cold in March?
Guam is typically warm in March.
Maximum temperatures go up compared to the previous month from +28°C to +28°C. The minimum temperature also goes up from +25°C to +25°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
March is one of the coolest months in Guam, here is the comparison with other months:
Climate in Guam in March
| February | March | April | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +28°C | +28°C | +29°C | ||||
| Min. temperature | ||||||
| +22°C | +21°C | +23°C | ||||
| Max. temperature | ||||||
| +31°C | +32°C | +34°C | ||||
| Rainfall | ||||||
| 91 mm | 70 mm | 101 mm | ||||
| Wind | ||||||
| 5 m/s | 5 m/s | 5 m/s | ||||
| Humidity | ||||||
| 78% | 78% | 79% | ||||
| Air pressure | ||||||
| 1011 HPa | 1011 HPa | 1010 HPa | ||||
| Sunny days | ||||||
| 2 | 2 | 2 | ||||
| Cloudy days | ||||||
| 5 | 5 | 3 | ||||
| Rainy days | ||||||
| 22 | 24 | 24 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
March weather is still as ok as in February. The temperature levels stay the same in the area of +28°C for average maximum temperature during the day. As March arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 91 mm to 70 mm. Humidity levels don’t change as the month goes on, averaging around 78%. The average wind speed doesn’t change much during March, staying around 5 m/s. The amount of sunny days stay about the same, averaging 2 sunny days during the month.
April brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 8 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Guam is gradually decreasing during March, going from 8 m/s to 4 m/s over the course of the month.
Rain
How was the weather last March in Guam?
Climate Change over Years
The climate in Guam in March has not changed much over the last 43 years.
The average temperature was the lowest in 1983 (+27°C) and the highest in 2018 (+31°C). The driest year was 1983 with only 1154 mm of rainfall, and the wettest year was 2023 with 4623 mm.
FAQ
Is March a good time to visit Guam?
Can you sunbathe in Guam in March?
Is Guam rainy in March?
Is it sunny in Guam in March?
Monthly weather in Guam
Source of the data
For this page, we’ve looked at the typical weather in Guam, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
