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
September heralds a minor drop in average high-temperature, sliding from August's 84.2°F (29°C) to a still moderately hot 78.3°F (25.7°C). September witnesses an average low-temperature hovering around a mild 58.8°F (14.9°C).Humidity
The average relative humidity in September is 74%.Rainfall
In Vandalia, in September, during 11.9 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. Throughout the year, in Vandalia, Missouri, there are 142.4 rainfall days, and 28.98" (736mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day in Vandalia, Missouri, is 12h and 26min.On the first day of September in Vandalia, sunrise is at 6:35 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:49 pm CDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
In Vandalia, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 5 during September translates into these guidelines:
Guard yourself - An obligation to protect skin and eyes from harm exists. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Boost your sun resistance with garments that are densely woven yet spacious.
Frequently asked questions
What is the temperature in September in Vandalia?
What is the average humidity in September in Vandalia?
How much does it rain in Vandalia in September?
When it does not snow in Vandalia?
Does it snow in Vandalia in September?
What is the average length of the day in September in Vandalia?
What time are sunrise and sunset in September in Vandalia?
How many hours of sunshine does Vandalia have in September?
What is the UV index reading in September in Vandalia?
Average temperature in September
Vandalia, MO
- Average high temperature in September: 78.3°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in September: 58.8°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in September
Vandalia, MO
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Vandalia, MO
- Average wind speed in September: 6.8mph
The windiest months (with the highest average wind speed) are January and February (9.8mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in September
Vandalia, MO
- Average humidity in September: 74%
The months with the highest relative humidity are May and July (79%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Vandalia, MO
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is May (3.62").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in September
Vandalia, MO
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is January (5.9 days).
Average snowfall in September
Vandalia, MO
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.7").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Vandalia, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Vandalia, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in September
Vandalia, MO
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is December (20 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in September
Vandalia, MO
- 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
Vandalia, MO
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 51).
The months with the least cloud cover are June, July and August (Cloud cover 29).
Average visibility in September
Vandalia, MO
- 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).
Vandalia, Missouri, USA
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