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 snowfall in September
- Average snowfall 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 onset of September brings a small shift in high-temperatures, falling from a moderately hot 78.6°F (25.9°C) in August to a pleasant 71.2°F (21.8°C). Despite drastic daytime highs, Mesa logs an average low-temperature reading of 46.9°F (8.3°C) throughout September.Humidity
In September, the average relative humidity is 47%.Rainfall
In Mesa, in September, during 11.4 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. Throughout the year, in Mesa, Colorado, there are 122.7 rainfall days, and 17.91" (455mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September in Mesa is 12h and 26min.On the first day of September, sunrise is at 6:41 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:56 pm MDT.
Sunshine
In Mesa, the average sunshine in September is 11h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Undertake precautions - Guarding against sun damage is counselled. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Frequently asked questions
What are September temperatures in Mesa?
What is the average humidity in September in Mesa?
How much does it rain in Mesa in September?
When it does not snow in Mesa?
Does it snow in Mesa in September?
How many hours of daylight does Mesa have in September?
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, CO
- Average high temperature in September: 71.2°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in September: 46.9°F
The month with the highest average low temperature is July (54.3°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in September
Mesa, CO
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is May (29.91"Hg).
Average wind speed in September
Mesa, CO
- Average wind speed in September: 5.9mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is January (4.2mph).
Average humidity in September
Mesa, CO
- Average humidity in September: 47%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is June (37%).
Average rainfall in September
Mesa, CO
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is March (2.09").
The driest month (with the least rainfall) is August (0.83").
Average rainfall days in September
Mesa, CO
- Average rainfall days in September: 11.4 days
The month with the highest number of rainy days is April (15.5 days).
The month with the least rainy days is November (6.2 days).
Average snowfall in September
Mesa, CO
- Average snowfall in September: 0"
The month with the highest snowfall is January (12.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Mesa, CO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Mesa, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 11h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 48min).
Average sunshine days in September
Mesa, CO
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is August (20.8 days).
The month with the least sunshine days is February (10.7 days).
Average UV index in September
Mesa, CO
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).
Average cloud cover in September
Mesa, CO
- Average cloud cover in September: 14
The month with the most cloud cover is February (Cloud cover 40).
The months with the least cloud cover are June and September (Cloud cover 14).
Average visibility in September
Mesa, CO
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Mesa, Colorado, USA
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