Guam Weather in July
In Guam, July brings high daytime temperatures around 30°C (86°F), with nights cooling to 26°C (79°F). This month falls within the rainy season, so expect frequent rainfall.
Rainfall in Guam in July
Guam is in the rainy season in July, with rain on around 19 days and an average of 288 mm (11 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.
Temperature in Guam in July
July in Guam brings typical temperatures with highs around 30°C (86°F) and lows of 26°C (79°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. With lows of 26°C (79°F), it stays warm throughout the night. A cold shower before going to sleep is one of the easiest ways to cool down before bed.
Sunshine in Guam in July
The month brings about 155 hours of sunlight, offering a comfortable mix of sun and rainy moments.If you're looking for dry conditions and comfortable temperatures, July may not be the ideal month to visit Guam. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Micronesia, check out our Guam's climate page.
Guam Temperature in July
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Chance of Rain
63%
Precipitation
288 mm (11 in)
Rainy days
19 days
Sunshine
155 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Guam typically stay consistent throughout July, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in July
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in July
Historical weather for Guam in July
Browse day-by-day weather records for Guam spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Guam historical weather extremes in July
According to our 49 years of weather records for Guam, the following extremes were recorded between 1976 and 2025.
- Guam recorded its highest July temperature of 34°C (93°F) on July 25, 1984.
- The lowest daytime temperature in July was 26°C (79°F), recorded on July 30, 1981.
- Guam registered its coldest July night on July 12, 2018, with temperatures dropping to 20°C (68°F).
Best Places in Micronesia in July
Find out more about the weather in Micronesia and which places have the best travel conditions in this month. See all of Micronesia in July →
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What to Wear in Guam in July
Warm temperatures in July make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Guam in July
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Micronesia, check out our Guam's climate page.
See the full Guam climate overview or explore weather in Micronesia.
