May weather forecast
Dededo, GU

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Weather in May

May stands as beginning of the warmest period in the town where mercury levels slightly rise from 82.9°F (28.3°C) to 84.2°F (29°C). As the month progresses, residents notice a significant increase in rainfall that reaches an average of 3.31" (84mm). With sunshine available for a significant part of the day, Dededo turns into a lively and vibrant town. The relaxed beach culture of the island dwells in sync with May's weather patterns, enticing tourists with favorable conditions for water sports and sunbathing. The weather allows the terrain's natural hues to shine, complementing the island's tropical climate.

Temperature

May's weather records an average high-temperature of a still moderately hot 84.2°F (29°C), showing little deviation from April. Dededo sustains an average of approximately a still warm 82.2°F (27.9°C) during May nights, with little variation from daytime highs.

Heat index

The average heat index in May is evaluated at a hot 93.2°F (34°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.

Humidity

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

Rainfall

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

Daylight

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

Sunshine

In Dededo, 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. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In May, the average maximum UV index of 7 translates into the following recommendations:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.

Frequently asked questions

Is it hot during May?

The high-temperature, in May, in Dededo, is 84.2°F (29°C), while the low-temperature averages to 82.2°F (27.9°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, in May is evaluated at 93.2°F (34°C).

What are the most humid months?

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

What is the average humidity in May?

The average relative humidity in May is 78%.

How much does it rain in May?

In Dededo, during May, the rain falls for 23.1 days and regularly aggregates up to 3.31" (84mm) of precipitation.

How many hours of daylight does Dededo have in May?

The average day length in May is 12h and 45min.

When are sunrise and sunset in May?

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, sunrise is at 5:52 am and sunset at 6:44 pm ChST.

How long on average sun shines in May?

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

What is the month with the highest UV index?

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

What is the UV index reading in May?

In Dededo, the average daily maximum UV index in May is 7. A UV Index value of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Dededo, GU

Average temperature in May - Dededo, 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).

Average pressure in May
Dededo, GU

Average pressure in May - Dededo, 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).

Average wind speed in May
Dededo, GU

Average wind speed in May - Dededo, 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).

Average humidity in May
Dededo, GU

Average humidity in May - Dededo, 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%).

Average rainfall in May
Dededo, GU

Average rainfall in May - Dededo, 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").

Average rainfall days in May
Dededo, GU

Average rainfall days in May - Dededo, 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).

Average daylight in May /
Average sunshine in May
Dededo, GU

Average daylight in May / Average sunshine in May - Dededo, GU
  • Average daylight in May: 12h and 5min

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 18min).

  • Average sunshine in May: 10h and 3min

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).

Average sunshine days in May
Dededo, GU

Average sunshine days in May - Dededo, 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).

Average UV index in May
Dededo, GU

Average UV index in May - Dededo, 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).

Average cloud cover in May
Dededo, GU

Average cloud cover in May - Dededo, 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).

Average visibility in May
Dededo, GU

Average visibility in May - Dededo, 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).

Dededo, Guam, USA

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