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
As August shifts into September in Phoenix, a minor alteration in temperatures is observed, with average highs reducing from 102.6°F (39.2°C) to a still sweltering 96.3°F (35.7°C). An average minimum temperature of 78.8°F (26°C) marks the month of September in Phoenix, Arizona.Humidity
The average relative humidity in September is 30%.Rainfall
In Phoenix, in September, it is raining for 4.7 days, with typically 0.67" (17mm) of accumulated precipitation. In Phoenix, during the entire year, the rain falls for 44.6 days and collects up to 5.04" (128mm) of precipitation.Snowfall
September is the only month when snow falls. September is the month with the most snowfall in Phoenix. Snow falls for 0.1 days and accumulates 0.04" (1mm) of snow.Daylight
In September, the average length of the day in Phoenix, Arizona, is 12h and 22min.On the first day of September in Phoenix, sunrise is at 6:02 am and sunset at 6:53 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 6:13 pm MST.
Sunshine
In September, the average sunshine in Phoenix is 9.7h.UV index
In Phoenix, the average daily maximum UV index in September is 7. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Frequently asked questions
How hot is it in Phoenix in September?
What is the average humidity in September in Phoenix?
How much does it rain in Phoenix in September?
When does it snow the most in Phoenix?
When does it start snowing in Phoenix?
How many hours of daylight does Phoenix have in September?
When is the sunrise / sunset in September in Phoenix?
How many hours of sunshine does Phoenix have in September?
How high is the UV index in September in Phoenix?
Average temperature in September
Phoenix, AZ
- Average high temperature in September: 96.3°F
The warmest month (with the highest average high temperature) is July (103.6°F).
The month with the lowest average high temperature is December (63°F).
- Average low temperature in September: 78.8°F
The month with the highest average low temperature is August (84.7°F).
The coldest month (with the lowest average low temperature) is January (47.5°F).
Average pressure in September
Phoenix, AZ
- Average pressure in September: 29.87"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).
Average wind speed in September
Phoenix, AZ
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is December (4.3mph).
Average humidity in September
Phoenix, AZ
- Average humidity in September: 30%
The month with the highest relative humidity is December (43%).
The month with the lowest relative humidity is June (16%).
Average rainfall in September
Phoenix, AZ
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is July (0.75").
The driest months (with the least rainfall) are May and June (0.08").
Average rainfall days in September
Phoenix, AZ
- Average rainfall days in September: 4.7 days
The month with the highest number of rainy days is July (7.8 days).
The month with the least rainy days is June (0.8 days).
Average snowfall in September
Phoenix, AZ
- Average snowfall in September: 0.04"
The month with the highest snowfall is September (0.04").
The months with the least snowfall are January, February, March, April, May, June, July, August, October, November and December (0").
Average snowfall days in September
Phoenix, AZ
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Phoenix, 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 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in September
Phoenix, AZ
- Average sunshine days in September: 23.7 days
The month with the most sunshine days is May (29.2 days).
The month with the least sunshine days is July (21.1 days).
Average UV index in September
Phoenix, AZ
- Average UV index in September: 7
The months with the highest UV index are May, June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Phoenix, 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
Phoenix, 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).
Phoenix, Arizona, USA
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