September weather forecastYarnell, AZ
September
Weather in September
The first month of the autumn, September, is also a hot month in Yarnell, Arizona, with an average temperature ranging between min 74.1°F (23.4°C) and max 90.7°F (32.6°C).Temperature
September witnesses a gentle descent in average high-temperature, descending from August's sweltering 96.1°F (35.6°C) to a tropical 90.7°F (32.6°C). Yarnell experiences an average low-temperature of 74.1°F (23.4°C) in the month of September.Humidity
In Yarnell, the average relative humidity in September is 32%.Rainfall
In September, the rain falls for 6.7 days. Throughout September, 1.14" (29mm) of precipitation is accumulated. In Yarnell, during the entire year, the rain falls for 60.7 days and collects up to 9.13" (232mm) of precipitation.Snowfall
In Yarnell, snow does not fall in January through November.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:04 am and sunset at 6:56 pm. On the last day of September, sunrise is at 6:25 am and sunset at 6:16 pm MST.
Sunshine
In Yarnell, the average sunshine in September is 9.7h.UV index
In Yarnell, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 7 in September translates into the following instructions:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Yarnell, AZ
- Average high temperature in September: 90.7°F
The warmest month (with the highest average high temperature) is July (97.3°F).
The month with the lowest average high temperature is December (58.8°F).
- Average low temperature in September: 74.1°F
The month with the highest average low temperature is August (79.7°F).
The coldest month (with the lowest average low temperature) is December (43.3°F).
Average pressure in September
Yarnell, AZ
- Average pressure in September: 29.85"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.8"Hg).
Average wind speed in September
Yarnell, AZ
- Average wind speed in September: 6.1mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is December (5.5mph).
Average humidity in September
Yarnell, AZ
- Average humidity in September: 32%
The month with the highest relative humidity is December (45%).
The month with the lowest relative humidity is June (17%).
Average rainfall in September
Yarnell, AZ
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is August (1.26").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in September
Yarnell, AZ
- Average rainfall days in September: 6.7 days
The month with the highest number of rainy days is July (10.5 days).
The month with the least rainy days is June (1.6 days).
Average snowfall days in September
Yarnell, AZ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Yarnell, 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: 9h and 42min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in September
Yarnell, AZ
- Average sunshine days in September: 21 days
The month with the most sunshine days is May (28.3 days).
The month with the least sunshine days is August (17.1 days).
Average UV index in September
Yarnell, 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
Yarnell, AZ
- Average cloud cover in September: 9
The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 6).
Average visibility in September
Yarnell, 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).
