What’s the climate like in Guam?
The current climate of Guam features average monthly temperatures ranging from highs of 32°C during the day to lows of 30°C. The average yearly temperature is around 31°C. At night, temperatures in the colder months average around 24°C and in the warmer months around 26°C.
The highest temperature recorded in Guam in recent years was 37°C in August 2021. The lowest daytime temperature recorded was 25°C in March 2017.
On average, Guam receives 4209 mm of precipitation each year. For comparison, UK gets 701 mm of precipitation annually.
Best time to visit Guam?
The best time to visit Guam for pleasant to warm weather is February through April. There might be some rain during this period, but the temperatures are just right for exploring Guam.
Climate Table of Guam
The climate table of Guam shows the average temperatures, precipitation, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp. max (°C) | 30 | 30 | 31 | 31 | 32 | 32 | 31 | 31 | 31 | 31 | 31 | 31 |
| Temp. min (°C) | 25 | 25 | 25 | 26 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 |
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| Precipitation (mm) | 252 | 164 | 72 | 135 | 256 | 223 | 563 | 683 | 643 | 637 | 346 | 235 |
| UV Index | 5 | 6 | 6 | 7 | 6 | 6 | 5 | 5 | 5 | 5 | 4 | 5 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
- Average yearly temperature: 31°C
- Highest temperature: 32°C in May and June
- Lowest temperature: 30°C in January and February
- Precipitation: 4209 mm per year, averaging 351 mm per month
- Driest months: 72 mm in March, 135 mm in April and 164 mm in February
- Wettest months: 683 mm in August, 643 mm in September and 637 mm in October
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Weather experiences in Guam
Good
The sky was clear and there were beautiful sunsets.... more
Good
All in all, a great experience.... more
Table of Contents
Average Temperature per Month in Guam
This graph shows the average maximum temperatures per month in Guam. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Guam
This graph shows how much precipitation Guam gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average UV Index per Month in Guam
This graph shows the average UV index per month in Guam. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Yearly Temperature in Guam
This graph shows the average yearly temperature in Guam. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Guam
This chart shows the total yearly precipitation in Guam over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
Weather experiences in Guam
The weather in Guam is rated an average of 4 out of 5 stars by 11 visitors. Have you been to Guam? Share your weather experience to help other visitors.
Write your own review
The sky was clear and there were beautiful sunsets.— This text is automatically translated to English
All in all, a great experience.— This text is automatically translated to English
The heat was intense, but the many hours of sunshine made up for this. It rained a few days, which cooled it down a bit. In short: beautiful weather!— This text is automatically translated to English
For an unashamed sun worshipper, the brilliant sun was heavenly and it remained surprisingly warm in the evening. The sun shone constantly, but occasional thunderstorms played against us.— This text is automatically translated to English
Regular rainfall caused some inconvenience, but fortunately this was short-lived.— This text is automatically translated to English
The evenings cooled off pleasantly and ensured a good night's sleep. There were occasional tropical showers, but they were brief and refreshing.— This text is automatically translated to English
It was tropically warm, perfect for the beach and outdoor activities. In the evening, it was pleasantly cool.— This text is automatically translated to English
It was hot, averaging 30 degrees, but not too hot. The light rain was pleasant and refreshing. The perfect escape from the winter cold!— This text is automatically translated to English
Tropical temperatures that may even rise and occasional showers. In short, great weather!— This text is automatically translated to English
Not too hot, not too chilly. There will be isolated, brief showers. Ideal for anyone who likes a mild, humid climate.— This text is automatically translated to English
A lovely combination of sunshine and some rain with temperatures around 28 degrees Celsius. Ideal for anyone who loves a warm Christmas. One small downside, it gets dark quite early.— This text is automatically translated to English
Have you been to Guam?
Share your weather experiences in Guam.
Average Weather in Guam by Month
Click on a month below to see detailed weather info for Guam. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
