September weather forecastGreer, AZ
September
Weather in September
With the arrival of September, the monsoon season in Greer starts to taper off, and the weather begins to transition into fall. The rainfall notably lessens from August 6.81" (173mm) down to 3.58" (91mm). Subsequently, the average daily amount of sunshine is extended, giving the weather a more stable and predictable pattern. The moderated temperatures and decreased probability of rain make this month ideal for outdoor events and activities. September, therefore, marks the gradual shift from the hot, wet summer to the cooler, dry fall season.Temperature
Greer records a slight change with September's average high-temperatures adjusting to a refreshing 67.6°F (19.8°C) from August's 72.1°F (22.3°C). An average low-temperature of 47.1°F (8.4°C) is observed during the September nights.Humidity
In September, the average relative humidity is 59%.Rainfall
In Greer, in September, during 16.9 rainfall days, 3.58" (91mm) of precipitation is typically accumulated. Throughout the year, there are 109 rainfall days, and 28.5" (724mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Greer, the average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 5:52 am and sunset at 6:43 pm. On the last day of the month, sunrise is at 6:12 am and sunset at 6:02 pm MST.
Sunshine
In Greer, the average sunshine in September is 10h.UV index
In Greer, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 during September leads to these advisories:
Exercise prevention - Precautions against solar damage are endorsed. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Greer, AZ
- Average high temperature in September: 67.6°F
The warmest month (with the highest average high temperature) is June (75.2°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in September: 47.1°F
The month with the highest average low temperature is July (53.6°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in September
Greer, AZ
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Greer, AZ
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Greer, AZ
- Average humidity in September: 59%
The month with the highest relative humidity is January (70%).
The month with the lowest relative humidity is June (33%).
Average rainfall in September
Greer, AZ
- Average rainfall in September: 3.58"
The wettest month (with the highest rainfall) is July (7.36").
The driest month (with the least rainfall) is October (0.83").
Average rainfall days in September
Greer, AZ
- Average rainfall days in September: 16.9 days
The month with the highest number of rainy days is July (25.8 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in September
Greer, AZ
- Average snowfall in September: 0"
The month with the highest snowfall is January (10.28").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Greer, AZ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (10 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Greer, 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 0min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 6min).
Average sunshine days in September
Greer, AZ
- Average sunshine days in September: 10.5 days
The month with the most sunshine days is November (24 days).
The month with the least sunshine days is July (3.5 days).
Average UV index in September
Greer, AZ
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Greer, AZ
- Average cloud cover in September: 21
The month with the most cloud cover is December (Cloud cover 33).
The month with the least cloud cover is June (Cloud cover 13).
Average visibility in September
Greer, 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).
