Weather in Guam in June 2026
- June is usually the hottest month of the year in Guam;
Average weather
Average temperature in Guam in June
The temperature in June is +31°C on average, with a range between a maximum of +32°C during the day and a minimum of +24°C at night.
The average maximum temperature goes up 13% by the end of the month, compared with the beginning of the month, from +30°C to +31°C.
Is Guam warm or cold in June?
Guam is typically warm in June.
Maximum temperatures go up compared to the previous month from +29°C to +30°C. The minimum temperature also goes up from +26°C to +26°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
June is the hottest month in Guam, here is the comparison with other months:
Climate in Guam in June
| May | June | July | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +29°C | +30°C | +29°C | ||||
| Min. temperature | ||||||
| +23°C | +23°C | +23°C | ||||
| Max. temperature | ||||||
| +34°C | +33°C | +33°C | ||||
| Rainfall | ||||||
| 132 mm | 209 mm | 351 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 3 m/s | ||||
| Humidity | ||||||
| 79% | 80% | 82% | ||||
| Air pressure | ||||||
| 1010 HPa | 1010 HPa | 1009 HPa | ||||
| Sunny days | ||||||
| 2 | 1 | 0 | ||||
| Cloudy days | ||||||
| 3 | 1 | 0 | ||||
| Rainy days | ||||||
| 26 | 27 | 29 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
June weather is still as ok as in May. It’s getting warmer as June arrives. The average maximum temperature goes up from +29°C to +30°C during the day. Prepare for more rain. Average rainfall goes from 132 mm to 209 mm. Humidity rises from 79% to 80%. The average wind speed doesn’t change much during June, staying around 4 m/s. The days becoming less sunny, going from 2 sunny days in May to 1 in June.
July brings much the same weather, it remains ok.
Wind
The average wind speed is 4 m/s getting up to 6 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 June, going from 5 m/s to 4 m/s over the course of the month.
Rain
How was the weather last June in Guam?
Climate Change over Years
The climate in Guam in June 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 June a good time to visit Guam?
Can you sunbathe in Guam in June?
Is Guam rainy in June?
Is it sunny in Guam in June?
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.
