Guam weather, climate and best time to visit

Best time to visit Guam

The best time to visit in Guam is from January until June and November and December, when you will have a warm temperature and limited till mediocre rainfall. The highest average temperature in in Guam is 29°C in May and the lowest is 28°C in January.

If you want to know what the average temperature is in in Guam or when most precipitation (rain or snow) falls, you can find a quick overview below. This way, you are well prepared. Our average monthly climate data is based on data from the past 30 years.

Average weather Guam by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Temperature (°C) 28 28 28 28 29 29 29 29 29 29 29 29
Precipitation (mm) 67 51 44 59 69 94 179 192 213 212 101 77
Climate data from city: Hagåtña

Travel and stay Guam

If you are planning on visiting Guam, check out these well-known travel agencies. They have been rated as the best by travelers and offer great prices for any budget.

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14 day weather forecast Guam

The weather for in Guam will be 31° till 30° degrees in the next 14 days with every day chance of light rain showers till heavy rain.

The weather forecast for Guam is based on the weather conditions in the city of Hagåtña.

Weather forecast this week

Tuesday 21 Sep Water Precip Chance Wind UV
31°
27°
31° 8.6 mm 75% 4 m/s 8
Wednesday 22 Sep Water Precip Chance Wind UV
30°
27°
31° 4.1 mm 60% 5 m/s 6
Thursday 23 Sep Water Precip Chance Wind UV
29°
27°
31° 30.6 mm 90% 6 m/s 3
Friday 24 Sep Water Precip Chance Wind UV
29°
26°
31° 10.9 mm 80% 3 m/s 3
Saturday 25 Sep Water Precip Chance Wind UV
29°
27°
31° 10.4 mm 80% 7 m/s 3
Sunday 26 Sep Water Precip Chance Wind UV
29°
27°
31° 39.8 mm 95% 6 m/s 3
Monday 27 Sep Water Precip Chance Wind UV
28°
25°
31° 26.3 mm 90% 5 m/s 3

Weather forecast next week

Tuesday 28 Sep Water Precip Chance Wind UV
29°
25°
31° 29.8 mm 90% 5 m/s 3
Wednesday 29 Sep Water Precip Chance Wind UV
30°
26°
31° 1.4 mm 30% 3 m/s 5
Thursday 30 Sep Water Precip Chance Wind UV
30°
27°
31° 0.7 mm 20% 3 m/s 8
Friday 1 Oct Water Precip Chance Wind UV
30°
27°
31° 1.6 mm 35% 4 m/s 1
Saturday 2 Oct Water Precip Chance Wind UV
30°
27°
31° 7.0 mm 70% 4 m/s 1
Sunday 3 Oct Water Precip Chance Wind UV
29°
27°
31° 3.8 mm 55% 3 m/s 1
Monday 4 Oct Water Precip Chance Wind UV
30°
28°
31° 4.1 mm 60% 3 m/s 1

Climate Guam

The average annual temperature for Guam is 29° degrees and there is about 1358 mm of rain in a year. It is dry for 49 days a year with an average humidity of 77% and an UV-index of 7.

Climate table of Guam

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Day temp. (°C) 28 28 28 28 29 29 29 29 29 29 29 29
Night temp. (°C) 27 27 27 28 28 29 29 29 29 28 28 28
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Precipitation (mm) 67 51 44 59 69 94 179 192 213 212 101 77
Days with rain 20 16 19 17 22 25 29 29 28 29 24 22
Dry days 11 12 12 13 9 5 2 2 2 2 6 9
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Sun hours per day 8 8 8 9 11 11 9 8 8 7 6 7
Wind force (Bft) 4 4 4 4 3 3 3 3 3 3 4 4
UV-index 7 7 7 7 7 7 7 7 7 7 7 7
Climate data from city: Hagåtña

Guam weather by month

What is the average weather like in a given month for Guam? Let's find out! Click on a month to check all the monthly averages for sunshine, temperature highs and lows, percentage chance of rain per day, snowfall accumulation and number of rainy days.

Weather experiences Guam

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Frequently asked questions

Where is Guam?

Guam lies in a straight line about 12,789 km from United States (New York → Hagåtña).

How long is the flight to Guam?

The flight time from Los Angeles International Airport (LAX) to Guam is approximately 13 h. 10 min.

How many inhabitants are there in Guam?

Guam has approximately 184,200 inhabitants.

How big is Guam?

The area of Guam is around 184,200 km². It is slightly smaller than United States.

What is the capital of Guam?

The capital of Guam is Hagåtña.

What is the currency of Guam?

In Guam the US dollar (USD) is used to pay.

What is the area code of Guam?

The area code to call Guam is +671.