October weather forecast
Merizo, GU

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Weather in October

October marks a decline in rainfall volume from the high figures witnessed the previous month. The reduced precipitation, coupled with a gradual drop in temperature, gives an indication of the forthcoming dry season. The transitional weather gets nurtured further by cyclical changes in daylight hours and sunshine duration. Although at the tail end of the monsoons, outdoor conditions remain pleasant with the decrease in rainfall intensity. The relatively calm wind adds to the inviting weather conditions.

Temperature

October in Merizo presents an average high-temperature of a still moderately hot 84.4°F (29.1°C), mirroring September. Merizo's October nights witness minimal differential from the daytime temperatures, with averages of 82.6°F (28.1°C).

Heat index

Throughout October, the heat index is evaluated at a very hot 95°F (35°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', offers an insight into how hot it feels when we factor in moisture content. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

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

Rainfall

In Merizo, in October, it is raining for 28.7 days, with typically 8.46" (215mm) of accumulated precipitation. Throughout the year, there are 288.5 rainfall days, and 60.08" (1526mm) of precipitation is accumulated.

Ocean temperature

In October, the average ocean temperature is 85.1°F (29.5°C).
Note: For activities such as swimming and diving, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as particularly pleasant and satisfying for prolonged periods without feeling uneasy.

Daylight

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

Sunshine

In October, the average sunshine is 6.9h.

UV index

The months with the highest UV index are January through August, October through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.
Note: A daily high UV index of 7 in October leads to these guidelines:
Guard oneself from overexposure. Defence against sun injury is vital. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Stay cautious! Sand and water reflections increase UV radiation potency.

Frequently asked questions

How hot is October?

Merizo in October has an average high-temperature of 84.4°F (29.1°C) and an average low-temperature of 82.6°F (28.1°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, in October is evaluated at 95°F (35°C).

What is the most humid month?

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

What is the average humidity in October?

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

How much does it rain in October?

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

How warm is the water in October?

In Merizo, in October, the average water temperature is 85.1°F (29.5°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.

What is the average length of the day in October?

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

When is the sunrise / sunset in October?

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.

How many hours of sunshine does Merizo have in October?

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

When is the highest UV index?

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

How high is the UV index in October?

The average daily maximum UV index in October is 7. A UV Index value of 6 to 7 symbolizes a high health threat from exposure to the Sun's UV radiation.

Average temperature in October
Merizo, GU

Average temperature in October - Merizo, 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).

Average pressure in October
Merizo, GU

Average pressure in October - Merizo, 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).

Average wind speed in October
Merizo, GU

Average wind speed in October - Merizo, 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).

Average humidity in October
Merizo, GU

Average humidity in October - Merizo, 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%).

Average rainfall in October
Merizo, GU

Average rainfall in October - Merizo, 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").

Average rainfall days in October
Merizo, GU

Average rainfall days in October - Merizo, 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).

Average sea temperature in October
Merizo, GU

Average sea temperature in October - Merizo, GU
  • Average sea temperature in October: 85°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).

Average daylight in October /
Average sunshine in October
Merizo, GU

Average daylight in October / Average sunshine in October - Merizo, GU
  • Average daylight in October: 11h 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 24min).

  • Average sunshine in October: 6h and 5min

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 October
Merizo, GU

Average sunshine days in October - Merizo, 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).

Average UV index in October
Merizo, GU

Average UV index in October - Merizo, 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).

Average cloud cover in October
Merizo, GU

Average cloud cover in October - Merizo, 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).

Average visibility in October
Merizo, GU

Average visibility in October - Merizo, 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).

Merizo, Guam, USA

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