October weather forecast
Umatac, GU

Weather in October

October, like September, in Umatac, 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).

Temperature

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

Heat index

The average heat index in October is calculated to be a sweltering 95°F (35°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', 'real feel', 'feels like', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like wind, clothing, pregnancy, and activity influence one's weather impression. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

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

Rainfall

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

Daylight

In Umatac, 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 5:55 pm ChST.

Sunshine

In Umatac, 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. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The average daily UV index of 7 in October transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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 Umatac, Guam, in October, 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 takes the relative humidity and factors it into the air temperature reading, in October is calculated to be 95°F (35°C).

What are the most humid months in Umatac?

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

What is the average humidity in October in Umatac?

The average relative humidity in October is 78%.

How many days does it rain in October in Umatac?

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

What is the average length of the day in October in Umatac?

The average day length in October in Umatac, Guam, is 11h and 50min.

What time are sunrise and sunset in October in Umatac?

On the first day of October in Umatac, 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 5:55 pm ChST.

How long on average sun shines in October in Umatac?

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

What are the months 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.

What is the UV index reading in October in Umatac?

In Umatac, Guam, the average daily maximum UV index in October is 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation.

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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