Weather in Guam in July 2026
Average weather
Average temperature in Guam in July
The temperature in July 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 down 12% by the end of the month, compared with the beginning of the month, from +32°C to +31°C.
Is Guam warm or cold in July?
Guam is typically warm in July.
Maximum temperatures go down compared to the previous month from +30°C to +29°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.
Take a look at how July is compared to other months in Guam:
Climate in Guam in July
| June | July | August | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +30°C | +29°C | +29°C | ||||
| Min. temperature | ||||||
| +23°C | +23°C | +23°C | ||||
| Max. temperature | ||||||
| +33°C | +33°C | +33°C | ||||
| Rainfall | ||||||
| 209 mm | 351 mm | 457 mm | ||||
| Wind | ||||||
| 4 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 80% | 82% | 84% | ||||
| Air pressure | ||||||
| 1010 HPa | 1009 HPa | 1008 HPa | ||||
| Sunny days | ||||||
| 1 | 0 | 0 | ||||
| Cloudy days | ||||||
| 1 | 0 | 0 | ||||
| Rainy days | ||||||
| 27 | 29 | 29 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
July weather is still as ok as in June. It’s getting colder in July. From +30°C in the day, the average maximum temperature lowers to +29°C. Prepare for more rain. Average rainfall goes from 209 mm to 351 mm. Humidity rises from 80% to 82%. Winds are calmer in comparison to June, going down from 4 m/s to 3 m/s on average. The days becoming less sunny, going from 1 sunny days in June to 0 in July.
August 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 increasing during July, going from 4 m/s to 4 m/s over the course of the month.
Rain
How was the weather last July in Guam?
Climate Change over Years
The climate in Guam in July 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 July a good time to visit Guam?
Can you sunbathe in Guam in July?
Is Guam rainy in July?
Is it sunny in Guam in July?
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.
