September weather forecastValle, AZ
September
Weather in September
The first month of the autumn, September, is still a warm month in Valle, Arizona, with an average temperature varying between 57°F (13.9°C) and 77.9°F (25.5°C).Temperature
The arrival of September is marked by a minor reduction in average high-temperature, sliding from a warm 84.2°F (29°C) in August to a still moderately hot 77.9°F (25.5°C). September is noted for a mean low-temperature of 57°F (13.9°C).Humidity
The average relative humidity in September in Valle is 37%.Rainfall
In September, the rain falls for 3.4 days. Throughout September, 0.2" (5mm) of precipitation is accumulated. In Valle, during the entire year, the rain falls for 46.8 days and collects up to 4.29" (109mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 23min.On the first day of the month, sunrise is at 6:01 am and sunset at 6:55 pm. On the last day of September, in Valle, sunrise is at 6:23 am and sunset at 6:13 pm MST.
Sunshine
In September, the average sunshine is 9.8h.UV index
In Valle, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 5 during September translates into these guidelines:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Valle, AZ
- Average high temperature in September: 77.9°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is December (43°F).
- Average low temperature in September: 57°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is December (26.2°F).
Average pressure in September
Valle, AZ
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Valle, AZ
- Average wind speed in September: 6.9mph
The windiest month (with the highest average wind speed) is April (9.7mph).
The calmest month (with the lowest average wind speed) is January (6.6mph).
Average humidity in September
Valle, AZ
- Average humidity in September: 37%
The month with the highest relative humidity is January (64%).
The month with the lowest relative humidity is June (21%).
Average rainfall in September
Valle, AZ
- Average rainfall in September: 0.2"
The wettest month (with the highest rainfall) is March (0.51").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Valle, AZ
- Average rainfall days in September: 3.4 days
The month with the highest number of rainy days is July (6 days).
The month with the least rainy days is June (1.9 days).
Average snowfall in September
Valle, AZ
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.11").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Valle, AZ
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are February and December (5.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Valle, AZ
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 48min
The month with the most sunshine is August (Average sunshine: 12h and 12min).
The month with the least sunshine is January (Average sunshine: 6h and 48min).
Average sunshine days in September
Valle, AZ
- Average sunshine days in September: 25.1 days
The month with the most sunshine days is June (27.3 days).
The month with the least sunshine days is February (21.4 days).
Average UV index in September
Valle, AZ
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Valle, AZ
- Average cloud cover in September: 9
The month with the most cloud cover is December (Cloud cover 24).
The month with the least cloud cover is June (Cloud cover 7).
Average visibility in September
Valle, 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).
