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📅 March
A month celebrating Guam’s CHamoru culture and traditions, with a good chance to experience local cultural events.
Check official source →🇬🇺 Guam, U.S.
Guam Weather in August
Wet season · Typhoon riskIn Guam, August averages about 30°C (85°F) during the day and 25°C (77°F) at night, so afternoons generally feel hot while evenings are mild to warm. Rain is a major part of trip planning, with about 30 days reaching at least 1 mm of precipitation and roughly 498 mm for the month.
Avg high85.4°F 29.6°CAvg low76.7°F 24.8°CRainy days~29.9 daysMonthly rain498.1 mm
🧳 Packing guide
What to wear in Guam in August
A practical August packing list for Guam starts here: light, breathable clothes work best, with sun protection for long outdoor days. A compact rain shell is useful, and the latest typhoon and transport updates matter more than long-range averages close to departure.
Travel takeaway: This can still be a rewarding time to visit, but keep outdoor plans flexible and recheck the short-range forecast before travel.
🗓️ Travel timing at a glance
Guam: 12-month travel weather
Guam is generally drier from January to May and wetter from July to November. Tropical storms and typhoons are an important late-summer and autumn consideration.
JanDry seasonFebDry seasonMarDry seasonAprDry seasonMayDry seasonJunTransition seasonJulWet seasonAugWet season · Typhoon riskSepWet season · Typhoon riskOctWet season · Typhoon riskNovWet season · Typhoon riskDecTransition season
Monthly labels summarize typical climate patterns for trip planning. Always check the latest forecast and tropical-storm alerts before departure.
🎉 Trip planning check
Guam 2026 events & busy periods
Check major events, holidays and periods that may affect crowds, transport or opening hours.
⚠️ Busy / closure period
Liberation Day events
📅 Around Jul 21
Crowds and traffic controls can affect Hagåtña and parade routes, so allow extra time when driving.
Check official source →Event dates, holiday schedules and opening hours can change. Recheck the linked official tourism or government source before departure.
Guam in August · recent 3 years
Compare the most recent complete year with the two years before it. Daily high / low temperatures are shown in °F.
CalendarNo measurable rain🌧️ Rain⛈️ Thunderstorm❄️ SnowHigh / Low · °F
⭐ August 2025 · latest complete year☔ 28 days · 293.8 mm
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1
29.7°C/24.6°C
🌧️ 17.8 mm
2
31.9°C/25.2°C
🌧️ 24.7 mm
3
31.2°C/24.8°C
🌧️ 9.4 mm
4
31.4°C/25.7°C
🌧️ 2.5 mm
5
30.1°C/23.1°C
🌧️ 10.6 mm
6
32.9°C/25.2°C
🌧️ 7.5 mm
7
30.6°C/24.5°C
🌧️ 18.7 mm
8
32.5°C/25°C
🌧️ 5.8 mm
9
31.4°C/25.8°C
🌧️ 1.4 mm
10
29.6°C/24°C
🌧️ 12 mm
11
30.9°C/24.6°C
No rain
12
32.3°C/26.8°C
No rain
13
31.9°C/24.8°C
🌧️ 4.2 mm
14
31.9°C/23.9°C
🌧️ 9.2 mm
15
31.7°C/24.2°C
🌧️ 29.4 mm
16
30.6°C/25.6°C
🌧️ 1.7 mm
17
32°C/26.7°C
🌧️ 2.2 mm
18
32.3°C/25.7°C
🌧️ 3.1 mm
19
33.1°C/26.6°C
🌧️ 9.3 mm
20
33.1°C/26.7°C
🌧️ 2.1 mm
21
30°C/24.1°C
🌧️ 23.3 mm
22
30.7°C/24.8°C
🌧️ 19.7 mm
23
29.6°C/24.7°C
🌧️ 11.5 mm
24
31.9°C/25.1°C
🌧️ 24.3 mm
25
32.9°C/24.8°C
🌧️ 5.5 mm
26
32.3°C/25.5°C
🌧️ 4.2 mm
27
32.2°C/26.2°C
No rain
28
32.3°C/25.2°C
🌧️ 3.3 mm
29
32.7°C/25.9°C
🌧️ 7.8 mm
30
30.2°C/24.7°C
🌧️ 14.1 mm
31
31.3°C/26.3°C
🌧️ 5.9 mm
August 2024☔ 28 days · 302.6 mm
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1
30.4°C/25.2°C
🌧️ 15.2 mm
2
28.7°C/24.3°C
🌧️ 26.7 mm
3
29.8°C/24.4°C
🌧️ 11.9 mm
4
30°C/24.8°C
🌧️ 2.6 mm
5
30.7°C/24.8°C
🌧️ 2.2 mm
6
31°C/25.3°C
🌧️ 6 mm
7
31.4°C/25.1°C
No rain
8
30.5°C/24.1°C
🌧️ 11.9 mm
9
31.8°C/24.5°C
🌧️ 6.8 mm
10
30.1°C/24°C
🌧️ 6.7 mm
11
30.7°C/24.4°C
🌧️ 7.6 mm
12
32°C/25.9°C
🌧️ 3.3 mm
13
31.4°C/26°C
🌧️ 2.2 mm
14
29.9°C/25.4°C
🌧️ 6.3 mm
15
31.1°C/24.4°C
🌧️ 2.8 mm
16
30.9°C/25.3°C
🌧️ 18 mm
17
27.3°C/24.3°C
🌧️ 21 mm
18
30.8°C/23.9°C
🌧️ 10.6 mm
19
30.9°C/25.6°C
🌧️ 3.2 mm
20
30.7°C/24.4°C
🌧️ 16.6 mm
21
26.9°C/24.1°C
🌧️ 25.3 mm
22
30.6°C/24°C
🌧️ 4.7 mm
23
30.9°C/26.4°C
No rain
24
32.4°C/25.9°C
No rain
25
30.1°C/24.5°C
🌧️ 31.1 mm
26
30.3°C/24°C
🌧️ 12.7 mm
27
31.4°C/24.8°C
🌧️ 4.5 mm
28
31°C/24.2°C
🌧️ 5.3 mm
29
31.4°C/26.2°C
🌧️ 5.6 mm
30
29.3°C/25.3°C
🌧️ 29.2 mm
31
30.7°C/25.9°C
🌧️ 1.1 mm
August 2023☔ 31 days · 587.7 mm
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1
30.2°C/23.7°C
🌧️ 12.3 mm
2
30.5°C/24°C
🌧️ 9.9 mm
3
30.3°C/25.4°C
🌧️ 6.8 mm
4
32.1°C/23.9°C
🌧️ 3.4 mm
5
30.8°C/25.7°C
🌧️ 7.5 mm
6
30.7°C/24.6°C
🌧️ 11.5 mm
7
30.7°C/23.9°C
🌧️ 22 mm
8
29.7°C/24.2°C
🌧️ 23.6 mm
9
27.3°C/24.5°C
🌧️ 38.2 mm
10
26.7°C/24°C
🌧️ 28.7 mm
11
26.6°C/24.3°C
🌧️ 34.6 mm
12
27.5°C/24.5°C
🌧️ 36.8 mm
13
28.1°C/24°C
🌧️ 35.7 mm
14
29.2°C/24.8°C
🌧️ 18.4 mm
15
30.4°C/24°C
🌧️ 21.7 mm
16
30.5°C/24.4°C
🌧️ 3.1 mm
17
31°C/25°C
🌧️ 2.9 mm
18
30.6°C/24.1°C
🌧️ 6.8 mm
19
31.1°C/24.9°C
🌧️ 9.7 mm
20
30.5°C/24.4°C
🌧️ 5.4 mm
21
29.5°C/24.6°C
🌧️ 11.6 mm
22
30.7°C/24.9°C
🌧️ 6.1 mm
23
29°C/25.1°C
🌧️ 17.6 mm
24
28.7°C/24.3°C
🌧️ 5.1 mm
25
30.5°C/25.7°C
🌧️ 5.7 mm
26
29.6°C/24.6°C
🌧️ 31 mm
27
29.5°C/25.3°C
🌧️ 29.2 mm
28
30.6°C/24.5°C
🌧️ 11.2 mm
29
27.1°C/24°C
🌧️ 56.2 mm
30
29.2°C/24.2°C
🌧️ 18.7 mm
31
26.3°C/24.1°C
🌧️ 56.3 mm
Historical calendars use Open-Meteo reanalysis data. A rainy day is counted when daily precipitation is at least 1 mm. Conditions at a specific hotel, beach or station can differ.
✈️ Traveling soon?
Current Guam weather and 7-day forecast
When departure is close, the latest forecast matters more than long-term averages.
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Forecast data: MET Norway · CC BY 4.0 · cached by Travel Weather Fairy
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Guam weather in other months
Switch months to compare the seasonal pattern.