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 sees a slight reduction in average high-temperature, with a shift from 82°F (27.8°C) in August to a still warm 76.1°F (24.5°C). During September, the nighttime temperature averages to a mild 56.5°F (13.6°C).Humidity
In September, the average relative humidity is 76%.Rainfall
In Unionville, in September, during 11.3 rainfall days, 2.44" (62mm) of precipitation is typically accumulated. In Unionville, during the entire year, the rain falls for 130.9 days and collects up to 24.65" (626mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Unionville, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:43 pm. On the last day of September, in Unionville, sunrise is at 7:08 am and sunset at 6:55 pm CDT.
Sunshine
In Unionville, the average sunshine in September is 9.2h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, the UV index of 4 transforms into the following advice:
Guard yourself - Avoiding sunburn is suggested. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Unionville in September?
What is the average humidity in September in Unionville?
How much does it rain in Unionville in September?
When it does not snow in Unionville?
Does it snow in Unionville in September?
What is the average length of the day in September in Unionville?
What time are sunrise and sunset in September in Unionville?
How many hours of sunshine does Unionville have in September?
What is the UV index reading in September in Unionville?
Average temperature in September
Unionville, MO
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (30.7°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure in September
Unionville, 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 (29.89"Hg).
Average wind speed in September
Unionville, MO
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is March (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in September
Unionville, MO
- Average humidity in September: 76%
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Unionville, MO
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in September
Unionville, MO
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is May (16.8 days).
The months with the least rainy days are January and February (4.3 days).
Average snowfall in September
Unionville, MO
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.86").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Unionville, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (9.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Unionville, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Unionville, MO
- Average sunshine days in September: 17.6 days
The month with the most sunshine days is November (20.3 days).
The month with the least sunshine days is June (10.9 days).
Average UV index in September
Unionville, MO
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Unionville, MO
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in September
Unionville, 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).
Unionville, Missouri, USA
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