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 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 beginning of September brings a slight decrease in the average high-temperature, transitioning from a sweltering 98.2°F (36.8°C) in August to a hot 92.5°F (33.6°C). Fountain Hills experiences an average low-temperature of 74.7°F (23.7°C) in the month of September.Humidity
The average relative humidity in September is 32%.Rainfall
In Fountain Hills, Arizona, during September, the rain falls for 8.2 days and regularly aggregates up to 1.06" (27mm) of precipitation. In Fountain Hills, during the entire year, the rain falls for 67.9 days and collects up to 10" (254mm) of precipitation.Daylight
In Fountain Hills, the average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:01 am and sunset at 6:51 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 6:12 pm MST.
Sunshine
The average sunshine in September is 9.6h.UV index
In September, the average daily maximum UV index in Fountain Hills is 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.Note: The UV index of 7 during September leads to these advisories:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in Fountain Hills in September?
What is the average humidity in September in Fountain Hills?
How many days does it rain in September in Fountain Hills?
What is the average length of the day in September in Fountain Hills?
When is the sunrise / sunset in September in Fountain Hills?
How many hours of sunshine does Fountain Hills have in September?
How high is the UV index in September in Fountain Hills?
Average temperature in September
Fountain Hills, AZ
- Average high temperature in September: 92.5°F
The warmest month (with the highest average high temperature) is July (99.1°F).
The month with the lowest average high temperature is December (60.3°F).
- Average low temperature in September: 74.7°F
The month with the highest average low temperature is August (80.4°F).
The coldest month (with the lowest average low temperature) is December (44.2°F).
Average pressure in September
Fountain Hills, AZ
- Average pressure in September: 29.89"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Fountain Hills, AZ
- Average wind speed in September: 5.3mph
The windiest months (with the highest average wind speed) are April and May (6.5mph).
The calmest month (with the lowest average wind speed) is December (4.8mph).
Average humidity in September
Fountain Hills, AZ
- Average humidity in September: 32%
The month with the highest relative humidity is December (46%).
The month with the lowest relative humidity is June (17%).
Average rainfall in September
Fountain Hills, AZ
- Average rainfall in September: 1.06"
The wettest month (with the highest rainfall) is July (1.54").
The driest months (with the least rainfall) are May and June (0.12").
Average rainfall days in September
Fountain Hills, AZ
- Average rainfall days in September: 8.2 days
The month with the highest number of rainy days is July (12.2 days).
The month with the least rainy days is June (1.6 days).
Average daylight in September /
Average sunshine in September
Fountain Hills, AZ
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in September
Fountain Hills, AZ
- Average sunshine days in September: 18.8 days
The month with the most sunshine days is May (28 days).
The month with the least sunshine days is July (14 days).
Average UV index in September
Fountain Hills, AZ
- Average UV index in September: 7
The months with the highest UV index are June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Fountain Hills, AZ
- Average cloud cover in September: 11
The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 6).
Average visibility in September
Fountain Hills, AZ
- 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).
Fountain Hills, Arizona, USA
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