Monthly weather forecast and climate
Hagåtña, GU

Weather in January

January, like December, in Hagåtña, Guam, is a moderately hot winter month, with temperature in the range of an average low of 80.6°F (27°C) and an average high of 82°F (27.8°C). In Hagåtña, the average high-temperature in January is essentially the same as in December - a still moderately hot 82°F (27.8°C). Weather in January »

Weather in February

The last month of the winter, February, is also a moderately hot month in Hagåtña, Guam, with average temperature varying between 79.7°F (26.5°C) and 81.7°F (27.6°C). February is the coldest month, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 79.7°F (26.5°C). The average heat index in February is estimated at a tropical 87.3°F (30.7°C). Weather in February »

Weather in March

March, the first month of the spring, in Hagåtña, is also a moderately hot month, with average temperature ranging between max 82°F (27.8°C) and min 80.1°F (26.7°C). In March, the average high-temperature is practically the same as in February - a still warm 82°F (27.8°C). Weather in March »

Weather in April

April, the same as March, is another warm spring month in Hagåtña, Guam, with average temperature ranging between min 81.1°F (27.3°C) and max 82.9°F (28.3°C). In Hagåtña, the average high-temperature is practically the same as in March - a still moderately hot 82.9°F (28.3°C). Weather in April »

Weather in May

May, the last month of the spring, in Hagåtña, is another warm month, with average temperature ranging between max 84.2°F (29°C) and min 82.2°F (27.9°C). In Hagåtña, the average high-temperature is practically the same as in April - a still moderately hot 84.2°F (29°C). Weather in May »

Weather in June

The first month of the summer, June, is also a moderately hot month in Hagåtña, Guam, with temperature in the range of an average high of 84.6°F (29.2°C) and an average low of 83.3°F (28.5°C). In June, the average high-temperature is essentially the same as in May - a still warm 84.6°F (29.2°C). Weather in June »

Weather in July

July, like June, in Hagåtña, Guam, is another warm summer month, with average temperature varying between 84.7°F (29.3°C) and 82.9°F (28.3°C). The warmest months are July and August, with an average high-temperature of 84.7°F (29.3°C). In July, the average heat index is estimated at a hot 94.8°F (34.9°C). Weather in July »

Weather in August

August, the last month of the summer, in Hagåtña, is another warm month, with average temperature varying between 84.7°F (29.3°C) and 82.4°F (28°C). July and August, with an average high-temperature of 84.7°F (29.3°C), are the warmest months. The average heat index is appraised at a hot 94.5°F (34.7°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Hagåtña, Guam, with average temperature varying between 84.4°F (29.1°C) and 82.8°F (28.2°C). In September, the average high-temperature is essentially the same as in August - a still warm 84.4°F (29.1°C). Weather in September »

Weather in October

October, like September, in Hagåtña, Guam, is another warm autumn month, with average temperature ranging between min 82.6°F (28.1°C) and max 84.4°F (29.1°C). In October, the average high-temperature remains the same as in September - a still warm 84.4°F (29.1°C). Weather in October »

Weather in November

The last month of the autumn, November, is another warm month in Hagåtña, Guam, with average temperature varying between 84.2°F (29°C) and 82.8°F (28.2°C). In November, the average high-temperature is almost the same as in October - a still moderately hot 84.2°F (29°C). Weather in November »

Weather in December

December, the first month of the winter, in Hagåtña, is also a moderately hot month, with average temperature varying between 82°F (27.8°C) and 83.5°F (28.6°C). In Hagåtña, the average high-temperature is almost the same as in November - a still warm 83.5°F (28.6°C). Weather in December »
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FAQ

What are the most humid months in Hagåtña?

Months with the highest humidity are January, March through May, October through December, with an average relative humidity of 78%.

How many days does it rain in Hagåtña?

In Hagåtña, Guam, during the entire year, the rain falls for 288.5 days and collects up to 60.08" (1526mm) of precipitation.

What is the month with the highest UV index in Hagåtña?

Months with the highest UV index are January through August, October through December, with an average maximum UV index of 7.

What is the coldest month in Hagåtña?

February is the coldest month, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 79.7°F (26.5°C).

What month is the ocean coldest in Hagåtña?

The month with the coldest seawater in Hagåtña, Guam, is February, with an average ocean temperature of 82°F (27.8°C).

What is the driest month in Hagåtña?

March is the month with the least rainfall in Hagåtña. Rain falls for 20.2 days and accumulates 1.81" (46mm) of precipitation.

When are the longest days in Hagåtña?

June has the longest days of the year, with an average of 12.9h of daylight.

What month has the most sunshine in Hagåtña?

June has the most sunshine of the year, with an average of 10.6h of sunshine.

What are the warmest months in Hagåtña?

Warmest months are July and August, with an average high-temperature of 84.7°F (29.3°C).

What is the least humid month in Hagåtña?

With an average relative humidity of 76%, August is the least humid month in Hagåtña.

What is the month with the warmest ocean in Hagåtña?

The month with the warmest seawater in Hagåtña, Guam, is August, with an average ocean temperature of 85.5°F (29.7°C).

What is the rainiest month in Hagåtña?

The month with the most rainfall is September when the rain falls for 28.1 days and typically aggregates up to 10.28" (261mm) of precipitation.

When is the lowest UV index in Hagåtña?

With an average maximum UV index of 6, September is the month with the lowest UV index in Hagåtña, Guam.

What is the month with the least sunshine in Hagåtña?

The month with the least sunshine in Hagåtña, Guam, is November, with an average of 6.3h of sunshine.

What is the month with the shortest days in Hagåtña?

December has the shortest days of the year, with an average of 11.3h of daylight.

Average temperature
Hagåtña, GU

Average temperature - Hagåtña, GU

The warmest months (with the highest average high temperature) are July and August (84.7°F).
The month with the lowest average high temperature is February (81.7°F).

The month with the highest average low temperature is June (83.3°F).
The coldest month (with the lowest average low temperature) is February (79.7°F).

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Average pressure
Hagåtña, GU

Average pressure - Hagåtña, GU

The month with the highest atmospheric pressure is February (29.88").
Months with the lowest atmospheric pressure are August, September and October (29.79").

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Average wind speed
Hagåtña, GU

Average wind speed - Hagåtña, GU

The windiest month (with the highest average wind speed) is February (16.3mph).
The calmest month (with the lowest average wind speed) is August (9.6mph).

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Average humidity
Hagåtña, GU

Average humidity - Hagåtña, GU

Months with the highest relative humidity are January, March, April, May, October, November and December (78%).
The month with the lowest relative humidity is August (76%).

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Average rainfall
Hagåtña, GU

Average rainfall - Hagåtña, GU

The wettest month (with the highest rainfall) is September (10.28").
The driest month (with the least rainfall) is March (1.81").

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Average rainfall days
Hagåtña, GU

Average rainfall days - Hagåtña, GU

Months with the highest number of rainy days are July and August (28.9 days).
The month with the least rainy days is February (17.5 days).

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Average sea temperature
Hagåtña, GU

Average sea temperature - Hagåtña, GU

The best month for swimming (with the highest average sea temperature) is August (85.4°F).
The coldest month (with the lowest average sea temperature) is February (82°F).

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Average daylight / Average sunshine
Hagåtña, GU

Average daylight / Average sunshine - Hagåtña, GU

The month with the longest days is June (Average daylight: 12.9h).
The month with the shortest days is December (Average daylight: 11.3h).

The month with the most sunshine is June (Average sunshine: 10.6h).
The month with the least sunshine is November (Average sunshine: 6.3h).

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Average sunshine days
Hagåtña, GU

Average sunshine days - Hagåtña, GU

The month with the most sunshine days is March (6.6 days).
The month with the least sunshine days is September (1.1 days).

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Average UV index
Hagåtña, GU

Average UV index - Hagåtña, GU

Months with the highest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 7).
The month with the lowest UV index is September (UV index 6).

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Average visibility
Hagåtña, GU

Average visibility - Hagåtña, GU

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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