September weather forecastApache Junction, AZ
September
Weather in September
September is the gateway to Apache Junction's transition from the blazing summer to mildly nippy autumn. Compared to August, a drop in temperatures is observable, signaling an onset of the cooling trend. The rainfall dips gradually, and the summer's saturated colors start fading into the pleasant aesthetic of fall. The heat loses its edge with maximum temperatures dropping to 93.7°F (34.3°C). By the time October rolls around, a marked difference in weather conditions is observed.Temperature
The arrival of September suggests a slight decrease in the average high-temperature, moving from a torrid 99.1°F (37.3°C) in August to a hot 93.7°F (34.3°C). In the month of September, Apache Junction's average low-temperature falls to a warm 75.4°F (24.1°C).Humidity
The average relative humidity in September is 33%.Rainfall
In Apache Junction, in September, during 7.5 rainfall days, 1.02" (26mm) of precipitation is typically accumulated. Throughout the year, there are 59.4 rainfall days, and 9.21" (234mm) of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:00 am and sunset at 6:51 pm. On the last day of September, sunrise is at 6:20 am and sunset at 6:11 pm MST.
Sunshine
The average sunshine in September is 9.6h.UV index
In September, the average daily maximum UV index is 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the average person.Note: In September, the maximum UV index of 7 translates into these guidelines:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Apache Junction, AZ
- Average high temperature in September: 93.7°F
The warmest month (with the highest average high temperature) is July (100°F).
The month with the lowest average high temperature is December (61.2°F).
- Average low temperature in September: 75.4°F
The month with the highest average low temperature is August (81.3°F).
The coldest month (with the lowest average low temperature) is January (45°F).
Average pressure in September
Apache Junction, AZ
- Average pressure in September: 29.89"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).
Average wind speed in September
Apache Junction, AZ
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is May (6.8mph).
The calmest month (with the lowest average wind speed) is December (5mph).
Average humidity in September
Apache Junction, AZ
- Average humidity in September: 33%
The month with the highest relative humidity is December (46%).
The month with the lowest relative humidity is June (17%).
Average rainfall in September
Apache Junction, AZ
- Average rainfall in September: 1.02"
The wettest month (with the highest rainfall) is July (1.34").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Apache Junction, AZ
- Average rainfall days in September: 7.5 days
The month with the highest number of rainy days is July (10.1 days).
The month with the least rainy days is June (1.4 days).
Average daylight in September /
Average sunshine in September
Apache Junction, AZ
- Average daylight in September: 12h and 24min
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 36min
The months with the most sunshine are June and August (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in September
Apache Junction, AZ
- Average sunshine days in September: 20.8 days
The month with the most sunshine days is May (28.4 days).
The month with the least sunshine days is July (17.3 days).
Average UV index in September
Apache Junction, AZ
- Average UV index in September: 7
The months with the highest UV index are June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Apache Junction, AZ
- Average cloud cover in September: 11
The month with the most cloud cover is December (Cloud cover 22).
The month with the least cloud cover is June (Cloud cover 6).
Average visibility in September
Apache Junction, 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).
