October weather forecast
Umatac, GU

Weather in October

October, the same as September, is a moderately hot autumn month in Umatac, Guam, with an average temperature varying between 82.6°F (28.1°C) and 84.4°F (29.1°C).

Temperature

In October, the average high-temperature remains equal as in September - a still moderately hot 84.4°F (29.1°C). The average low-temperature, in Umatac, Guam, is 82.6°F (28.1°C).

Heat index

The average heat index in October is calculated to be a torrid 95°F (35°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'apparent temperature', or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, pregnancy, metabolic differences). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

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

Rainfall

In Umatac, during October, the rain falls for 28.7 days and regularly aggregates up to 8.46" (215mm) of precipitation. Throughout the year, there are 288.5 rainfall days, and 60.08" (1526mm) of precipitation is accumulated.

Daylight

The average length of the day in October is 11h and 50min.
On the first day of October, sunrise is at 6:10 am and sunset at 6:11 pm. On the last day of the month, sunrise is at 6:14 am and sunset at 5:54 pm ChST.

Sunshine

In Umatac, Guam, the average sunshine in October is 6.9h.

UV index

January through August, October through December, with an average maximum UV index of 7, are months with the highest UV index in Umatac. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 7 in October interpret into the following advice:
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.
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FAQ

What is the temperature in October in Umatac?

In October, in Umatac, the average high-temperature is 84.4°F (29.1°C), and the average low-temperature is 82.6°F (28.1°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, in October is calculated to be 95°F (35°C).

What is the most humid month in Umatac?

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

What is the average humidity in October in Umatac?

In October, the average relative humidity in Umatac is 78%.

How much does it rain in Umatac in October?

In Umatac, in October, during 28.7 rainfall days, 8.46" (215mm) of precipitation is typically accumulated.

How many hours of daylight does Umatac have in October?

In October, the average day length is 11h and 50min.

What time are sunrise and sunset in October in Umatac?

On the first day of October in Umatac, Guam, sunrise is at 6:10 am and sunset at 6:11 pm. On the last day of the month, sunrise is at 6:14 am and sunset at 5:54 pm ChST.

How long on average sun shines in October in Umatac?

In October, the average sunshine duration is 6.9h.

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

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

How high is the UV index in October in Umatac?

The average daily maximum UV index in October in Umatac, Guam, is 7. A UV Index estimate of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.

Average temperature in October
Umatac, GU

Average temperature in October - Umatac, GU
  • Average high temperature in October: 84.4°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 October: 82.6°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 October
Umatac, GU

Average pressure in October - Umatac, GU
  • Average pressure in October: 29.79"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 October
Umatac, GU

Average wind speed in October - Umatac, GU
  • Average wind speed in October: 11.2mph

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 October
Umatac, GU

Average humidity in October - Umatac, GU
  • Average humidity in October: 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 October
Umatac, GU

Average rainfall in October - Umatac, GU
  • Average rainfall in October: 8.46"

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 October
Umatac, GU

Average rainfall days in October - Umatac, GU
  • Average rainfall days in October: 28.7 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 daylight in October /
Average sunshine in October
Umatac, GU

Average daylight in October / Average sunshine in October - Umatac, GU
  • Average daylight in October: 11h and 50min

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).

  • Average sunshine in October: 6h and 54min

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 October
Umatac, GU

Average sunshine days in October - Umatac, GU
  • Average sunshine days in October: 1.4 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 October
Umatac, GU

Average UV index in October - Umatac, GU
  • Average UV index in October: 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 October
Umatac, GU

Average cloud cover in October - Umatac, GU
  • Average cloud cover in October: 46

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 October
Umatac, GU

Average visibility in October - Umatac, GU
  • Average visibility in October: 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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