September weather forecastAlpine, AZ
September
Weather in September
Temperatures in September start to reduce, setting the stage for the incoming autumn. With diminishing rain and a manageable 70.2°F (21.2°C) high temperature, September offers the last touch of summer warmth. The generous daylight hours continue to brighten Alpine, allowing ample opportunity for outdoor exploration. As summer bids adieu, Alpine prepares to welcome the rich hues of autumn, painting a picturesque setting.Temperature
In September, Alpine experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 74.8°F (23.8°C) in August to an agreeable 70.2°F (21.2°C). In Alpine, September nights witness a steady temperature drop to a chilly 49.8°F (9.9°C).Humidity
In Alpine, Arizona, the average relative humidity in September is 54%.Rainfall
In September, in Alpine, Arizona, the rain falls for 15.3 days. Throughout September, 2.72" (69mm) of precipitation is accumulated. Throughout the year, there are 105.2 rainfall days, and 20.71" (526mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Alpine, Arizona.Daylight
In Alpine, the average length of the day in September is 12h and 22min.On the first day of September in Alpine, sunrise is at 5:50 am and sunset at 6:41 pm. On the last day of the month, sunrise is at 6:10 am and sunset at 6:01 pm MST.
Sunshine
In Alpine, the average sunshine in September is 10.5h.UV index
In Alpine, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: An average maximum UV index of 4 in September leads to these recommendations:
Undertake precautions - It is suggested to shield oneself from sunburn. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Alpine, AZ
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is June (78.1°F).
The month with the lowest average high temperature is January (40.6°F).
- Average low temperature in September: 49.8°F
The month with the highest average low temperature is July (55.9°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).
Average pressure in September
Alpine, AZ
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Alpine, AZ
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Alpine, AZ
- Average humidity in September: 54%
The month with the highest relative humidity is January (67%).
The month with the lowest relative humidity is June (29%).
Average rainfall in September
Alpine, AZ
- Average rainfall in September: 2.72"
The wettest month (with the highest rainfall) is July (5.43").
The driest month (with the least rainfall) is April (0.59").
Average rainfall days in September
Alpine, AZ
- Average rainfall days in September: 15.3 days
The month with the highest number of rainy days is July (25.3 days).
The month with the least rainy days is November (2.5 days).
Average snowfall in September
Alpine, AZ
- Average snowfall in September: 0"
The month with the highest snowfall is January (7.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Alpine, AZ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (8.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Alpine, AZ
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 10h and 30min
The month with the most sunshine is June (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in September
Alpine, AZ
- Average sunshine days in September: 11.4 days
The month with the most sunshine days is November (24.4 days).
The month with the least sunshine days is July (4 days).
Average UV index in September
Alpine, AZ
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Alpine, AZ
- Average cloud cover in September: 17
The month with the most cloud cover is July (Cloud cover 27).
The month with the least cloud cover is June (Cloud cover 12).
Average visibility in September
Alpine, 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).
