Weather in September
Temperature
Mount Lemmon, Arizona, starts September with an average high-temperature of a pleasant 70.3°F (21.3°C), a minor shift from August's 73.6°F (23.1°C). A stark contrast in day to night temperatures can be seen in September, with an average low-temperature of 45.1°F (7.3°C).Rainfall
In Mount Lemmon, during September, the rain falls for 5 days and regularly aggregates up to 3.39" (86mm) of precipitation. Throughout the year, there are 59 rainfall days, and 29.57" (751mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Mount Lemmon, the average length of the day in September is 12h and 21min.On the first day of September, sunrise is at 5:58 am and sunset at 6:47 pm. On the last day of the month, sunrise is at 6:17 am and sunset at 6:08 pm MST.
Sunshine
In Mount Lemmon, the average sunshine in September is 10.5h.Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
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Average temperature in September
Mount Lemmon, AZ
- Average high temperature in September: 70.4°F
The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is February (48.3°F).
- Average low temperature in September: 45.1°F
The months with the highest average low temperature are July and August (49.8°F).
The coldest month (with the lowest average low temperature) is February (21.8°F).
Average rainfall in September
Mount Lemmon, AZ
- Average rainfall in September: 3.4"
The wettest month (with the highest rainfall) is August (7").
The driest month (with the least rainfall) is May (0.3").
Average rainfall days in September
Mount Lemmon, AZ
- Average rainfall days in September: 5 days
The month with the highest number of rainy days is August (11 days).
The months with the least rainy days are May and June (2 days).
Average snowfall in September
Mount Lemmon, AZ
- Average snowfall in September: 0"
The month with the highest snowfall is February (20.4").
The months with the least snowfall are May, June, July, August and September (0").
Average daylight in September /
Average sunshine in September
Mount Lemmon, AZ
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 10h and 3min
The month with the most sunshine is June (Average sunshine: 12h and 24min).
The months with the least sunshine are January and December (Average sunshine: 7h and 48min).
Mount Lemmon, Arizona, USA
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