Travel Weather Fairy🎊 Featured event
Guam Liberation Day
📅 Jul 21 each year
An important Guam commemoration with parades, ceremonies and fireworks. Related events are often held throughout July.
Check official source →🇬🇺 Guam, U.S.
Guam Weather in May
Dry seasonWeather in Guam during May is typically hot in the daytime and warm after sunset, based on 2016–2025 averages of 30°C (87°F) / 26°C (78°F). The 10-year average shows around 23 rainy days and about 146 mm of monthly precipitation, so rain is a major part of trip planning.
Avg high86.7°F 30.4°CAvg low77.9°F 25.5°CRainy days~22.7 daysMonthly rain146.5 mm
🧳 Packing guide
What to wear in Guam in May
For what to wear in Guam in May, light, breathable clothes work best, with sun protection for long outdoor days. Add a compact umbrella or light rain jacket because wet weather is common enough to affect sightseeing.
Travel takeaway: The month can work well for a trip if you are comfortable building indoor alternatives around wetter periods.
🗓️ 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 May · 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
⭐ May 2025 · latest complete year☔ 23 days · 84 mm
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1
32.4°C/26.3°C
🌧️ 1.5 mm
2
32.3°C/26.4°C
🌧️ 2.3 mm
3
30.8°C/23.8°C
🌧️ 3.6 mm
4
32°C/26.5°C
🌧️ 1 mm
5
32.4°C/25.7°C
No rain
6
31.9°C/26.4°C
🌧️ 2.3 mm
7
32.8°C/26.4°C
No rain
8
32.4°C/26.5°C
🌧️ 1.2 mm
9
32.6°C/26.1°C
🌧️ 1.2 mm
10
32°C/26.8°C
🌧️ 1.9 mm
11
31.5°C/25.5°C
🌧️ 1.1 mm
12
32.7°C/26.4°C
No rain
13
32.7°C/26.5°C
🌧️ 1.1 mm
14
31.6°C/25.6°C
🌧️ 3.6 mm
15
32.7°C/27.2°C
No rain
16
32.6°C/26.9°C
No rain
17
32.4°C/24.5°C
🌧️ 3 mm
18
32.6°C/24.7°C
🌧️ 2.1 mm
19
32.6°C/24.6°C
No rain
20
32.7°C/25.1°C
No rain
21
32.1°C/27.1°C
No rain
22
31.8°C/26.5°C
🌧️ 3.7 mm
23
32.1°C/25.6°C
🌧️ 2.5 mm
24
31.9°C/26.5°C
🌧️ 6.8 mm
25
32.5°C/25.9°C
🌧️ 1.9 mm
26
32.1°C/25.7°C
🌧️ 2.2 mm
27
32.1°C/25.8°C
🌧️ 1 mm
28
32.2°C/25.1°C
🌧️ 21.6 mm
29
32.9°C/25.5°C
🌧️ 9.2 mm
30
33°C/27°C
🌧️ 3.6 mm
31
32.4°C/26.3°C
🌧️ 1.2 mm
May 2024☔ 25 days · 85.8 mm
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1
30.6°C/25.1°C
🌧️ 3.2 mm
2
31.2°C/25.7°C
🌧️ 2.1 mm
3
30.6°C/25.1°C
🌧️ 2.5 mm
4
30.8°C/25.2°C
🌧️ 5.2 mm
5
30.6°C/25.8°C
🌧️ 4.1 mm
6
30.2°C/25.5°C
🌧️ 5.1 mm
7
31.3°C/24.9°C
🌧️ 2.3 mm
8
30.9°C/25.3°C
🌧️ 1.4 mm
9
31.6°C/25.1°C
🌧️ 5.9 mm
10
31.9°C/26.7°C
No rain
11
31.7°C/26.4°C
🌧️ 1.1 mm
12
31.5°C/26.5°C
🌧️ 1.7 mm
13
31.8°C/25.9°C
🌧️ 1.6 mm
14
31.1°C/26.2°C
🌧️ 3.3 mm
15
31.9°C/26.6°C
🌧️ 1.9 mm
16
31.2°C/26.5°C
🌧️ 2.1 mm
17
30.9°C/26°C
🌧️ 1.8 mm
18
31.7°C/26.5°C
No rain
19
30.5°C/25.8°C
🌧️ 2.3 mm
20
30.9°C/26.6°C
🌧️ 4.2 mm
21
30.9°C/26.4°C
🌧️ 1.1 mm
22
31.5°C/25.6°C
🌧️ 2.6 mm
23
31.9°C/26.9°C
No rain
24
30.1°C/24°C
🌧️ 10.9 mm
25
31.8°C/25.2°C
No rain
26
32.2°C/25.7°C
No rain
27
31.6°C/26.1°C
🌧️ 2.3 mm
28
31.8°C/24.3°C
🌧️ 2.3 mm
29
32.4°C/25.9°C
No rain
30
31.5°C/26.3°C
🌧️ 3.8 mm
31
32.3°C/23.9°C
🌧️ 9.4 mm
May 2023☔ 24 days · 605.8 mm
Sun
Mon
Tue
Wed
Thu
Fri
Sat
1
30°C/25°C
No rain
2
30°C/25.6°C
🌧️ 1.1 mm
3
29.8°C/25.6°C
🌧️ 1 mm
4
30.7°C/25.5°C
No rain
5
30.1°C/25.1°C
🌧️ 2.9 mm
6
30°C/25.4°C
🌧️ 2.1 mm
7
28.8°C/24.6°C
🌧️ 2.1 mm
8
29.9°C/24.7°C
No rain
9
31.1°C/25.6°C
🌧️ 1.7 mm
10
30.7°C/25.1°C
🌧️ 2.7 mm
11
30.4°C/25°C
🌧️ 1.6 mm
12
31.4°C/24.5°C
🌧️ 3 mm
13
30.4°C/25.7°C
No rain
14
31.5°C/25.1°C
🌧️ 1 mm
15
30.6°C/26.6°C
🌧️ 2 mm
16
32°C/26.2°C
No rain
17
31.7°C/26.5°C
No rain
18
30.6°C/26.4°C
🌧️ 1.1 mm
19
31.8°C/26.1°C
🌧️ 2.1 mm
20
31.4°C/26.5°C
🌧️ 1.7 mm
21
30.8°C/26.1°C
No rain
22
29.6°C/26.3°C
🌧️ 1.8 mm
23
27.8°C/24.2°C
🌧️ 51.1 mm
24
27.1°C/24.3°C
🌧️ 264.4 mm
25
26.2°C/24°C
🌧️ 171.3 mm
26
30.2°C/25.2°C
🌧️ 2.9 mm
27
29.4°C/24.8°C
🌧️ 9.8 mm
28
29.4°C/25.5°C
🌧️ 1.7 mm
29
29.9°C/24.7°C
🌧️ 4.9 mm
30
26.3°C/23.2°C
🌧️ 39.5 mm
31
25.5°C/23.1°C
🌧️ 29.2 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.
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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.