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
September ushers in a minor alteration in Mesa's climate, with the average high-temperature moving from August's very hot 100.9°F (38.3°C) to a still fiery hot 95.4°F (35.2°C). Mesa observes an average nighttime temperature of 77.4°F (25.2°C) during September.Humidity
In Mesa, the average relative humidity in September is 31%.Rainfall
In September, the rain falls for 7.4 days. Throughout September, 0.79" (20mm) of precipitation is accumulated. Throughout the year, there are 60.2 rainfall days, and 7.91" (201mm) of precipitation is accumulated.Daylight
In September, the average length of the day in Mesa is 12h and 22min.On the first day of the month, sunrise is at 6:02 am and sunset at 6:52 pm. On the last day of September, sunrise is at 6:21 am and sunset at 6:12 pm MST.
Sunshine
In September, the average sunshine in Mesa is 9.7h.UV index
In Mesa, the average daily maximum UV index in September is 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Mesa in September?
What is the average humidity in September in Mesa?
How many days does it rain in September in Mesa?
What is the average length of the day in September in Mesa?
When are sunrise and sunset in September in Mesa?
How long on average sun shines in September in Mesa?
What is the UV index reading in September in Mesa?
Average temperature in September
Mesa, AZ
- Average high temperature in September: 95.4°F
The warmest month (with the highest average high temperature) is July (101.8°F).
The month with the lowest average high temperature is December (62.4°F).
- Average low temperature in September: 77.4°F
The month with the highest average low temperature is August (83.8°F).
The coldest month (with the lowest average low temperature) is January (46.4°F).
Average pressure in September
Mesa, AZ
- Average pressure in September: 29.88"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.82"Hg).
Average wind speed in September
Mesa, AZ
- Average wind speed in September: 5.2mph
The windiest months (with the highest average wind speed) are April and May (6.4mph).
The calmest month (with the lowest average wind speed) is December (4.5mph).
Average humidity in September
Mesa, AZ
- Average humidity in September: 31%
The month with the highest relative humidity is December (44%).
The month with the lowest relative humidity is June (17%).
Average rainfall in September
Mesa, AZ
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is July (1.1").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Mesa, AZ
- Average rainfall days in September: 7.4 days
The month with the highest number of rainy days is July (10.6 days).
The month with the least rainy days is June (1.2 days).
Average daylight in September /
Average sunshine in September
Mesa, 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
Mesa, AZ
- Average sunshine days in September: 20 days
The month with the most sunshine days is May (28.4 days).
The month with the least sunshine days is July (17.6 days).
Average UV index in September
Mesa, 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
Mesa, AZ
- Average cloud cover in September: 10
The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in September
Mesa, 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).
Mesa, Arizona, USA
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