Tamuning, Guam — Weather in May 2027

Climate Overview

Tamuning, Guam in May has hot conditions, with highs reaching 28.6°C (83°F) and afternoons the warmest part of the day. Rain falls on about 15 days this month, totalling around 95 mm. Winds are noticeable. Sea temperature reaches 29.1°C (84°F).

This month falls at the end of Spring.

Temperatures remain fairly steady throughout May, with daily highs around 29°C (84°F).

Rainfall is heaviest during the last third of the month, while the first third tends to be drier.

Wind speeds ease off through the month, from 30 km/h (19 mph) to 26 km/h (16 mph).

The warmest days tend to fall around the 23th, averaging 28.8°C (84°F).

Compared to April, this month is about 1°C warmer with 2 more rainy days.

Monthly May Averages

Temperature

29°C / 27°C

Feels Like

33°C / 29°C

Rain

15 days · 95 mm

Sunshine

11.5h / day

Humidity

81% — Very Muggy

Wind

28 km/h

Wind Direction

E (86°)

Gusts

38 km/h

Daylight

12.8 h

Cloud Cover

54%

Clear Sky Days

3.5

UV Index

8.4 — Very High

Sea Temperature

29°C

Dew Point

24°C — Oppressive

Moon Phase

Waxing Gibbous · 66%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 05:56

Daylight 12.7h

Sunset 18:41

What to Expect

Daytime temperatures around 29°C (83°F) are ideal for full-day outdoor exploration. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Rain most often builds later in the day, so mornings are typically the driest window and afternoon showers are more likely.

Recent yearly records for May have stayed close to the long-run average.

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January best	28°C / 26°C	29°C / 27°C	15days (70 mm) Wet	10.4h Excellent	78% Humid	7 High	Good	View Details
February best	27°C / 26°C	29°C / 26°C	12days (60 mm) Wet	10.6h Excellent	78% Humid	8.1 Very High	Good	View Details
March best	28°C / 26°C	31°C / 27°C	12days (44 mm) Wet	10.9h Excellent	79% Humid	9 Very High	Good	View Details
April best	28°C / 26°C	32°C / 28°C	13days (83 mm) Wet	11.1h Excellent	80% Humid	9.2 Very High	Good	View Details
May	29°C / 27°C	33°C / 29°C	15days (95 mm) Wet	11.5h Excellent	81% Humid	8.4 Very High	Fair	View Details
June	29°C / 27°C	33°C / 30°C	20days (155 mm) Wet	11h Excellent	82% Humid	8.4 Very High	Wet	View Details
July	29°C / 27°C	33°C / 30°C	29days (273 mm) Wet	9.8h Good	83% Humid	7.9 Very High	Wet	View Details
August	29°C / 26°C	34°C / 30°C	29days (361 mm) Wet	8.7h Good	84% Humid	8.2 Very High	Wet	View Details
September	29°C / 26°C	34°C / 30°C	28days (369 mm) Wet	8.7h Good	83% Humid	8.1 Very High	Wet	View Details
October	29°C / 26°C	33°C / 29°C	28days (359 mm) Wet	8.7h Good	84% Humid	7.8 Very High	Wet	View Details
November	29°C / 27°C	32°C / 29°C	24days (183 mm) Wet	9.7h Good	82% Humid	7.2 Very High	Wet	View Details
December	28°C / 27°C	31°C / 28°C	19days (101 mm) Wet	10.3h Excellent	80% Humid	6.9 High	Wet	View Details

What to Wear

Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

UmbrellaWaterproof jacketWaterproof shoesBreathable clothingSunscreen (SPF 30+)Sun hatSunglasses

Frequently Asked Questions

Expand all

Is May a good time to visit Tamuning?

May is typically fair for visiting Tamuning, with average highs of 29°C (83°F) and around 15 rainy days. Tamuning, Guam in May has hot conditions, with highs reaching 28.6°C (83°F) and afternoons the warmest part of the day.

Does it rain a lot in Tamuning in May?

Tamuning typically sees around 15 rainy days in May with 95 mm (3.7 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Tamuning in May?

Nights stay pleasantly warm in Tamuning during May, around 27°C (80°F). Light evening wear is sufficient.

What should I pack for Tamuning in May?

With highs of 29°C (83°F) and lows of 27°C (80°F) in May, we recommend: Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). Comfortable walking shoes are essential.

Is May among the best months weather-wise in Tamuning?

May is not the most favourable month weather-wise in Tamuning. Consider visiting during months with milder temperatures or less rainfall for a better experience.

What is the UV index in Tamuning in May?

The average UV index in Tamuning during May is 8 (very high). Strong sun protection is essential — SPF 50+, protective clothing, and avoid prolonged outdoor exposure during peak hours.

How many hours of daylight are there in Tamuning in May?

Tamuning gets approximately 13 hours of daylight per day in May, with around 12 hours of sunshine.

Does it snow in Tamuning in May?

Snow is uncommon in Tamuning during May based on 10-year climate averages.

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