September weather forecastHorn, AZ
September
Weather in September
The first month of the autumn, September, is still a torrid month in Horn, Arizona, with an average temperature varying between 98.2°F (36.8°C) and 81°F (27.2°C).Temperature
Horn's weather subtly changes with the onset of September, barely falling from a very hot 103.6°F (39.8°C) in August to a still fiery hot 98.2°F (36.8°C). Throughout the month of September, Horn witnesses an average temperature of 81°F (27.2°C).Humidity
In Horn, the average relative humidity in September is 31%.Rainfall
In Horn, during September, the rain falls for 6 days and regularly aggregates up to 0.51" (13mm) of precipitation. Throughout the year, there are 39.5 rainfall days, and 4.06" (103mm) of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:09 am and sunset at 6:58 pm. On the last day of the month, sunrise is at 6:28 am and sunset at 6:19 pm MST.
Sunshine
In September, the average sunshine is 9.7h.UV index
The average daily maximum UV index in September is 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum UV index of 7 in September translates into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Horn, AZ
- Average high temperature in September: 98.2°F
The warmest month (with the highest average high temperature) is July (103.8°F).
The month with the lowest average high temperature is December (64.8°F).
- Average low temperature in September: 81°F
The month with the highest average low temperature is August (86.2°F).
The coldest months (with the lowest average low temperature) are January and December (49.6°F).
Average pressure in September
Horn, AZ
- Average pressure in September: 29.78"Hg
The month with the highest atmospheric pressure is January (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.73"Hg).
Average wind speed in September
Horn, AZ
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is July (8.6mph).
The calmest month (with the lowest average wind speed) is December (5.6mph).
Average humidity in September
Horn, AZ
- Average humidity in September: 31%
The month with the highest relative humidity is December (40%).
The month with the lowest relative humidity is June (21%).
Average rainfall in September
Horn, AZ
- Average rainfall in September: 0.51"
The wettest month (with the highest rainfall) is July (0.75").
The driest month (with the least rainfall) is May (0.04").
Average rainfall days in September
Horn, AZ
- Average rainfall days in September: 6 days
The month with the highest number of rainy days is July (8.2 days).
The month with the least rainy days is May (1 days).
Average daylight in September /
Average sunshine in September
Horn, 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 42min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 6min).
Average sunshine days in September
Horn, AZ
- Average sunshine days in September: 22.3 days
The month with the most sunshine days is May (29.7 days).
The month with the least sunshine days is July (19.3 days).
Average UV index in September
Horn, AZ
- Average UV index in September: 7
The months with the highest UV index are June, July and August (UV index 8).
The months with the lowest UV index are November and December (UV index 4).
Average cloud cover in September
Horn, AZ
- Average cloud cover in September: 9
The month with the most cloud cover is December (Cloud cover 18).
The month with the least cloud cover is June (Cloud cover 5).
Average visibility in September
Horn, 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).
