May weather forecast
Hagåtña, GU

Weather in May

The last month of the spring, May, is also a moderately hot month in Hagåtña, Guam, with temperature in the range of an average low of 82.2°F (27.9°C) and an average high of 84.2°F (29°C).

Temperature

In May, the average high-temperature is essentially the same as in April - a still moderately hot 84.2°F (29°C). The average low-temperature, is 82.2°F (27.9°C).

Heat index

The average heat index in May is estimated at a hot 93.7°F (34.3°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, clothing, pregnancy), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

January, March through May, October through December, with an average relative humidity of 78%, are the most humid months.

Rainfall

In Hagåtña, during May, the rain falls for 23.1 days and regularly aggregates up to 3.31" (84mm) of precipitation. In Hagåtña, Guam, during the entire year, the rain falls for 288.5 days and collects up to 60.08" (1526mm) of precipitation.

Ocean temperature

In Hagåtña, Guam, the average water temperature is 84°F (28.9°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In Hagåtña, the average length of the day in May is 12h and 45min.
On the first day of May in Hagåtña, sunrise is at 5:59 am and sunset at 6:36 pm. On the last day of the month, sunrise is at 5:52 am and sunset at 6:44 pm ChST.

Sunshine

In Hagåtña, the average sunshine in May is 10.5h.

UV index

January through August, October through December, with an average maximum UV index of 7, are months with the highest UV index in Hagåtña. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 7 in May transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in May in Hagåtña?

In May, in Hagåtña, Guam, the average high-temperature is 84.2°F (29°C), and the average low-temperature is 82.2°F (27.9°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in May is estimated at 93.7°F (34.3°C).

What are the most humid months in Hagåtña?

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

What is the average humidity in May in Hagåtña?

In May, the average relative humidity in Hagåtña, Guam, is 78%.

How many days does it rain in May in Hagåtña?

In Hagåtña, Guam, in May, during 23.1 rainfall days, 3.31" (84mm) of precipitation is typically accumulated.

What is the water temperature in May in Hagåtña?

In Hagåtña, the average seawater temperature in May is 84°F (28.9°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Hagåtña have in May?

In May, the average day length is 12h and 45min.

When is the sunrise / sunset in May in Hagåtña?

In May, on the first day of the month, sunrise is at 5:59 am and sunset at 6:36 pm. On the last day of the month, in Hagåtña, Guam, sunrise is at 5:52 am and sunset at 6:44 pm ChST.

How long on average sun shines in May in Hagåtña?

In May, the average sunshine duration in Hagåtña is 10.5h.

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

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

What is the UV index intensity in May in Hagåtña?

The average daily maximum UV index in May is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to UV radiation.

Average temperature in May
Hagåtña, GU

Average temperature in May - Hagåtña, GU
  • Average high temperature in May: 84.2°F

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).

  • Average low temperature in May: 82.2°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 in May
Hagåtña, GU

Average pressure in May - Hagåtña, GU
  • Average pressure in May: 29.85"Hg

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 in May
Hagåtña, GU

Average wind speed in May - Hagåtña, GU
  • Average wind speed in May: 11.7mph

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 in May
Hagåtña, GU

Average humidity in May - Hagåtña, GU
  • Average humidity in May: 78%

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 in May
Hagåtña, GU

Average rainfall in May - Hagåtña, GU
  • Average rainfall in May: 3.31"

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 in May
Hagåtña, GU

Average rainfall days in May - Hagåtña, GU
  • Average rainfall days in May: 23.1 days

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 sea temperature in May
Hagåtña, GU

Average sea temperature in May - Hagåtña, GU
  • Average sea temperature in May: 84°F

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 in May /
Average sunshine in May
Hagåtña, GU

Average daylight in May / Average sunshine in May - Hagåtña, GU
  • Average daylight in May: 12h and 45min

The month with the longest days is June (Average daylight: 12h and 55min).
The month with the shortest days is December (Average daylight: 11h and 21min).

  • Average sunshine in May: 10h and 30min

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 in May
Hagåtña, GU

Average sunshine days in May - Hagåtña, GU
  • Average sunshine days in May: 4.3 days

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 in May
Hagåtña, GU

Average UV index in May - Hagåtña, GU
  • Average UV index in May: 7

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 cloud cover in May
Hagåtña, GU

Average cloud cover in May - Hagåtña, GU
  • Average cloud cover in May: 39

The months with the most cloud cover are January, August and October (Cloud cover 46).
The months with the least cloud cover are May and June (Cloud cover 39).

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Average visibility in May
Hagåtña, GU

Average visibility in May - Hagåtña, GU
  • Average visibility in May: 6mi

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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