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 arrival of September corresponds with a light shift in temperature, down from a warm 78.3°F (25.7°C) in August to a pleasant 72.7°F (22.6°C). Vandalia records an average nighttime low-temperature of 54.5°F (12.5°C) throughout September.Humidity
The average relative humidity in September is 79%.Rainfall
In Vandalia, during September, the rain falls for 10 days and regularly aggregates up to 0.63" (16mm) of precipitation. Throughout the year, there are 112.7 rainfall days, and 10" (254mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Vandalia, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 7:10 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 7:40 am and sunset at 7:26 pm EDT.
Sunshine
In Vandalia, the average sunshine in September is 7.9h.UV index
The average daily maximum UV index in September in Vandalia is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When are sunrise and sunset in September in Vandalia?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Vandalia, MI
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in September: 54.5°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in September
Vandalia, MI
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January, March, November and December (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Vandalia, MI
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in September
Vandalia, MI
- Average humidity in September: 79%
The month with the highest relative humidity is January (87%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in September
Vandalia, MI
- Average rainfall in September: 0.63"
The wettest month (with the highest rainfall) is June (1.34").
The driest month (with the least rainfall) is February (0.47").
Average rainfall days in September
Vandalia, MI
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is May (13.8 days).
The months with the least rainy days are January and February (4.1 days).
Average snowfall in September
Vandalia, MI
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Vandalia, MI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Vandalia, MI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in September
Vandalia, MI
- Average sunshine days in September: 17.2 days
The months with the most sunshine days are March and November (18.7 days).
The month with the least sunshine days is June (13.2 days).
Average UV index in September
Vandalia, MI
- Average UV index in September: 4
The months with the highest UV index are June and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Vandalia, MI
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Vandalia, MI
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, July, August and September (5mi).
Vandalia, Michigan, USA
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