Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The commencement of September includes a gentle temperature shift, with the average high-temperature dropping a bit from 79.9°F (26.6°C) in August to a still moderately hot 73.4°F (23°C). Throughout September, the average low-temperature in Fort Defiance, Arizona, records at a fresh 54.1°F (12.3°C).Humidity
The average relative humidity in September in Fort Defiance is 43%.Rainfall
In Fort Defiance, in September, during 12.1 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. In Fort Defiance, during the entire year, the rain falls for 91.1 days and collects up to 12.72" (323mm) of precipitation.Snowfall
In Fort Defiance, snow does not fall in June through September.Daylight
In September, the average length of the day in Fort Defiance, Arizona, is 12h and 23min.On the first day of September in Fort Defiance, Arizona, sunrise is at 6:48 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 7:00 pm MDT.
Sunshine
The average sunshine in September is 10.8h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 5 in September translates into these instructions:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
What are September temperatures in Fort Defiance?
What is the average humidity in September in Fort Defiance?
How much does it rain in Fort Defiance in September?
When it does not snow in Fort Defiance?
Does it snow in Fort Defiance in September?
What is the average length of the day in September in Fort Defiance?
When are sunrise and sunset in September in Fort Defiance?
How many hours of sunshine does Fort Defiance have in September?
How high is the UV index in September in Fort Defiance?
Average temperature in September
Fort Defiance, AZ
- Average high temperature in September: 73.4°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (37.8°F).
- Average low temperature in September: 54.1°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).
Average pressure in September
Fort Defiance, AZ
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Fort Defiance, AZ
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is April (11.4mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Fort Defiance, AZ
- Average humidity in September: 43%
The month with the highest relative humidity is January (71%).
The month with the lowest relative humidity is June (24%).
Average rainfall in September
Fort Defiance, AZ
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is July (2.76").
The driest month (with the least rainfall) is June (0.39").
Average rainfall days in September
Fort Defiance, AZ
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is November (3.1 days).
Average snowfall in September
Fort Defiance, AZ
- Average snowfall in September: 0"
The month with the highest snowfall is December (6.42").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Fort Defiance, AZ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Fort Defiance, AZ
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 10h and 5min
The month with the most sunshine is June (Average sunshine: 11h and 48min).
The months with the least sunshine are January and December (Average sunshine: 6h and 24min).
Average sunshine days in September
Fort Defiance, AZ
- Average sunshine days in September: 13.7 days
The month with the most sunshine days is November (23.5 days).
The month with the least sunshine days is July (8.7 days).
Average UV index in September
Fort Defiance, AZ
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Fort Defiance, AZ
- Average cloud cover in September: 13
The months with the most cloud cover are January and December (Cloud cover 29).
The month with the least cloud cover is June (Cloud cover 10).
Average visibility in September
Fort Defiance, AZ
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Fort Defiance, Arizona, USA
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