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
Setting in of September comes with a decrease in the average high-temperature, moving from a moderately hot 75.7°F (24.3°C) in August to a refreshing 65.5°F (18.6°C). Avon reports a substantial plunge from daytime highs during the nights of September, with an average low-temperature of 41.2°F (5.1°C).Humidity
In September, the average relative humidity is 55%.Rainfall
In Avon, during September, the rain falls for 9.7 days and regularly aggregates up to 1.14" (29mm) of precipitation. In Avon, during the entire year, the rain falls for 151.7 days and collects up to 16.46" (418mm) of precipitation.Snowfall
January through June, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 1.2 snowfall days, it receives 1.73" (44mm) of snow. Throughout the year, in Avon, there are 105 snowfall days, and 49.69" (1262mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 32min.On the first day of September, sunrise is at 6:51 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 7:11 pm MDT.
Sunshine
In Avon, the average sunshine in September is 9.7h.UV index
In September, the average daily maximum UV index in Avon is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: In September, a daily UV index of 3 turns into the following recommendations:
Be mindful. Those with pale skin might receive burns in fewer than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Note well! The intensity of the Sun's UV rays can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Avon in September?
What is the average humidity in September in Avon?
How much does it rain in Avon in September?
When does it start snowing in Avon?
What is the average length of the day in September in Avon?
What time are sunrise and sunset in September in Avon?
How many hours of sunshine does Avon have in September?
What is the UV index reading in September in Avon?
Average temperature in September
Avon, MT
- Average high temperature in September: 65.5°F
The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is December (25.5°F).
- Average low temperature in September: 41.2°F
The month with the highest average low temperature is August (47.8°F).
The coldest month (with the lowest average low temperature) is December (11.7°F).
Average pressure in September
Avon, MT
- Average pressure in September: 29.98"Hg
The months with the highest atmospheric pressure are January and December (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Avon, MT
- Average wind speed in September: 5.6mph
The windiest months (with the highest average wind speed) are January and April (6.6mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in September
Avon, MT
- Average humidity in September: 55%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are July and August (49%).
Average rainfall in September
Avon, MT
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is June (2.8").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in September
Avon, MT
- Average rainfall days in September: 9.7 days
The month with the highest number of rainy days is May (19.9 days).
The month with the least rainy days is December (8.8 days).
Average snowfall in September
Avon, MT
- Average snowfall in September: 1.73"
The month with the highest snowfall is February (8.78").
The months with the least snowfall are July and August (0").
Average snowfall days in September
Avon, MT
- Average snowfall days in September: 1.2 days
The month with the highest number of snowfall days is February (19.7 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Avon, MT
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in September
Avon, MT
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is September (16.1 days).
The month with the least sunshine days is February (6.7 days).
Average UV index in September
Avon, MT
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Avon, MT
- Average cloud cover in September: 22
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 15).
Average visibility in September
Avon, MT
- Average visibility in September: 6mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
Avon, Montana, USA
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