Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average sea temperature in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The unfolding of September shows an average high-temperature of a still warm 84.4°F (29.1°C), indicating a slight variance from August's 84.7°F (29.3°C). In September, Merizo experiences a marginal drop in temperature, with averages of 82.8°F (28.2°C) at night.Heat index
The heat index value during September is evaluated at a tropical 93.2°F (34°C). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.When referencing the heat index, its values are suitable for shady environments and light breezes. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
In September, the average relative humidity in Merizo, Guam, is 77%.Rainfall
The month with the most rainfall in Merizo, Guam, is September, when the rain falls for 28.1 days and typically aggregates up to 10.28" (261mm) of precipitation.Ocean temperature
In September, the average ocean temperature is 85.1°F (29.5°C).Note: For water activities like swimming, diving, and more, temperatures ranging between 77°F (25°C) and 84.2°F (29°C) offer superior comfort and enjoyment for lengthy durations.
Daylight
The average length of the day in September is 12h and 13min.On the first day of the month, sunrise is at 6:09 am and sunset at 6:32 pm. On the last day of September, in Merizo, sunrise is at 6:10 am and sunset at 6:11 pm ChST.
Sunshine
The average sunshine in September in Merizo is 7.9h.UV index
With an average maximum UV index of 6, September is the month with the lowest UV index in Merizo. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: A maximum high daily UV index of 6 during September translates into the following directions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
Frequently asked questions
How hot is September in Merizo?
What is the average humidity in September in Merizo?
What is the rainiest month in Merizo?
How many days does it rain in September in Merizo?
What is the water temperature in September in Merizo?
How many hours of daylight does Merizo have in September?
What time are sunrise and sunset in September in Merizo?
How many hours of sunshine does Merizo have in September?
What is the month with the lowest UV index in Merizo?
What is the UV index intensity in September in Merizo?
Average temperature in September
Merizo, GU
- Average high temperature in September: 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 September: 82.8°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 September
Merizo, GU
- Average pressure in September: 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 September
Merizo, GU
- Average wind speed in September: 9.9mph
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 September
Merizo, GU
- Average humidity in September: 77%
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 September
Merizo, GU
- Average rainfall in September: 10.28"
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 September
Merizo, GU
- Average rainfall days in September: 28.1 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 sea temperature in September
Merizo, GU
- Average sea temperature in September: 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 September /
Average sunshine in September
Merizo, GU
- Average daylight in September: 12h and 1min
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 September: 7h 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 September
Merizo, GU
- Average sunshine days in September: 1.1 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 September
Merizo, GU
- Average UV index in September: 6
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 September
Merizo, GU
- Average cloud cover in September: 45
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 September
Merizo, GU
- Average visibility in September: 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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