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

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14 day weather forecast Guam

The weather for in Guam will be around 30° degrees in the next 14 days with every day chance of light rain showers or even quite a bit of rain.

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

Weather forecast this week

Thursday 16 Sep Water Precip Chance Wind UV
30°
26°
30° 3.9 mm 55% 3 m/s 6
Friday 17 Sep Water Precip Chance Wind UV
29°
27°
30° 5.0 mm 60% 2 m/s 5
Saturday 18 Sep Water Precip Chance Wind UV
29°
27°
30° 7.0 mm 70% 1 m/s 3
Sunday 19 Sep Water Precip Chance Wind UV
30°
26°
30° 0.3 mm 10% 2 m/s 4
Monday 20 Sep Water Precip Chance Wind UV
30°
27°
30° 0.2 mm 20% 3 m/s 4
Tuesday 21 Sep Water Precip Chance Wind UV
30°
27°
30° 1.9 mm 40% 5 m/s 7
Wednesday 22 Sep Water Precip Chance Wind UV
29°
27°
30° 9.3 mm 75% 4 m/s 3

Weather forecast next week

Thursday 23 Sep Water Precip Chance Wind UV
30°
27°
30° 4.6 mm 60% 4 m/s 5
Friday 24 Sep Water Precip Chance Wind UV
29°
26°
30° 7.3 mm 70% 2 m/s 3
Saturday 25 Sep Water Precip Chance Wind UV
30°
26°
30° 4.0 mm 55% 3 m/s 3
Sunday 26 Sep Water Precip Chance Wind UV
30°
27°
30° 3.3 mm 50% 3 m/s 1
Monday 27 Sep Water Precip Chance Wind UV
30°
27°
30° 5.7 mm 65% 2 m/s 3
Tuesday 28 Sep Water Precip Chance Wind UV
29°
26°
30° 9.6 mm 75% 4 m/s 1
Wednesday 29 Sep Water Precip Chance Wind UV
30°
26°
30° 3.3 mm 50% 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 14,173 km from New Zealand (Cape Town → Hagåtña).

How long is the flight to Guam?

The flight time from Cape Town International Airport to Guam is approximately 17 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 7x smaller than New Zealand.

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.

Exchange rates on 16 September 2021

  • 1 US dollar = 0.065 South African rand
  • 1 South African rand = 15.42 US dollar
  • 10 US dollar = 0.648 South African rand
  • 10 South African rand = 154.23 US dollar
  • 100 US dollar = 6.48 South African rand
  • 100 South African rand = 1,542.31 US dollar

What is the area code of Guam?

The area code to call Guam is +671.