Climate and monthly weather forecast
Agat, GU

Weather in January

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

Weather in February

The last month of the winter, February, is another warm month in Agat, Guam, with an average temperature ranging between min 79.7°F (26.5°C) and max 81.7°F (27.6°C). The coldest month is February, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 79.7°F (26.5°C). In February, the average heat index is calculated to be a tropical 87.3°F (30.7°C). Weather in February »

Weather in March

The first month of the spring, March, is also a moderately hot month in Agat, Guam, with temperature in the range of an average high of 82°F (27.8°C) and an average low of 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 Agat, Guam, with temperature in the range of an average high of 82.9°F (28.3°C) and an average low of 81.1°F (27.3°C). In April, the average high-temperature is almost the same as in March - a still moderately hot 82.9°F (28.3°C). Weather in April »

Weather in May

The last month of the spring, May, is also a moderately hot month in Agat, Guam, with an average temperature varying between 82.2°F (27.9°C) and 84.2°F (29°C). In May, the average high-temperature is practically the same as in April - a still warm 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 Agat, Guam, with temperature in the range of an average low of 83.3°F (28.5°C) and an average high of 84.6°F (29.2°C). In Agat, the average high-temperature in June is almost the same as in May - a still warm 84.6°F (29.2°C). Weather in June »

Weather in July

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

Weather in August

The last month of the summer, August, is also a moderately hot month in Agat, Guam, with an average temperature varying between 82.4°F (28°C) and 84.7°F (29.3°C). July and August, with an average high-temperature of 84.7°F (29.3°C), are the warmest months. In August, the average heat index is calculated to be a hot 94.5°F (34.7°C). Weather in August »

Weather in September

September, the first month of the autumn in Agat, is still a warm month, with an average temperature fluctuating between 82.8°F (28.2°C) and 84.4°F (29.1°C). In Agat, the average high-temperature in September 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 Agat, Guam, is another warm autumn month, with temperature in the range of an average low of 82.6°F (28.1°C) and an average high of 84.4°F (29.1°C). In October, the average high-temperature remains equal as in September - a still warm 84.4°F (29.1°C). Weather in October »

Weather in November

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

Weather in December

The first month of the winter, December, is also a moderately hot month in Agat, Guam, with temperature in the range of an average high of 83.5°F (28.6°C) and an average low of 82°F (27.8°C). In December, the average high-temperature is relatively the same as in November - a still moderately hot 83.5°F (28.6°C). Weather in December »
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FAQ

What is the most humid month in Agat?

The months with the highest humidity in Agat, Guam, are January, March through May, October through December, with an average relative humidity of 78%.

How much does it rain in Agat?

Throughout the year, there are 288.5 rainfall days, and 60.08" (1526mm) of precipitation is accumulated.

What are the months with the highest UV index in Agat?

The months with the highest UV index in Agat, Guam, are January through August, October through December, with an average maximum UV index of 7.

What is the coldest month in Agat?

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

What is the driest month in Agat?

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

When are the longest days in Agat?

With an average of 12h and 54min of daylight, June has the longest days of the year in Agat.

What month has the most sunshine in Agat?

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

What are the warmest months in Agat?

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

What is the least humid month in Agat?

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

What is the rainiest month in Agat?

September is the month with the most rainfall. Rain falls for 28.1 days and accumulates 10.28" (261mm) of precipitation.

When is the lowest UV index in Agat?

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

What is the month with the least sunshine in Agat?

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

What is the month with the shortest days in Agat?

With an average of 11h and 22min of daylight, December has the shortest days of the year.

Is there Daylight Saving Time (DST) in Agat?

Agat, Guam, does not observe Daylight Saving Time (DST). ChST timezone is used over the entire year.

Average temperature
Agat, GU

Average temperature - Agat, 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
Agat, GU

Average pressure - Agat, GU

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

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Average wind speed
Agat, GU

Average wind speed - Agat, 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
Agat, GU

Average humidity - Agat, GU

The 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
Agat, GU

Average rainfall - Agat, 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
Agat, GU

Average rainfall days - Agat, GU

The 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 daylight / Average sunshine
Agat, GU

Average daylight / Average sunshine - Agat, GU

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 22min).

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is November (Average sunshine: 6h and 18min).

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Average sunshine days
Agat, GU

Average sunshine days - Agat, 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
Agat, GU

Average UV index - Agat, GU

The 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
Agat, GU

Average visibility - Agat, GU

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

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