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
With September's onset, the weather reveals a slight temperature decrease, transitioning from a warm 85.5°F (29.7°C) in August to a still moderately hot 79.7°F (26.5°C). Nighttime temperatures in Cool Valley consistently average a mild 60.1°F (15.6°C) during September.Humidity
The average relative humidity in September in Cool Valley, Missouri, is 73%.Rainfall
In Cool Valley, during September, the rain falls for 12.3 days and regularly aggregates up to 1.73" (44mm) of precipitation. In Cool Valley, during the entire year, the rain falls for 141.9 days and collects up to 27.68" (703mm) of precipitation.Snowfall
April through October are months without snowfall in Cool Valley.Daylight
In September, the average length of the day in Cool Valley, Missouri, is 12h and 26min.On the first day of September, sunrise is at 6:31 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:45 pm CDT.
Sunshine
The average sunshine in September is 9.6h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index, 5 during September, leads to the following recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Cool Valley?
What is the average humidity in September in Cool Valley?
How much does it rain in Cool Valley in September?
When it does not snow in Cool Valley?
How many hours of daylight does Cool Valley have in September?
What time are sunrise and sunset in September in Cool Valley?
How many hours of sunshine does Cool Valley have in September?
What is the UV index reading in September in Cool Valley?
Average temperature in September
Cool Valley, MO
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (37.2°F).
- Average low temperature in September: 60.1°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in September
Cool Valley, 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 (29.92"Hg).
Average wind speed in September
Cool Valley, MO
- Average wind speed in September: 6.1mph
The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.6mph).
Average humidity in September
Cool Valley, MO
- Average humidity in September: 73%
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Cool Valley, MO
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is February (1.42").
Average rainfall days in September
Cool Valley, MO
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is July (16.3 days).
The months with the least rainy days are February and December (7.3 days).
Average snowfall in September
Cool Valley, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.05").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Cool Valley, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.8 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
Cool Valley, MO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in September
Cool Valley, MO
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in September
Cool Valley, MO
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Cool Valley, MO
- Average cloud cover in September: 28
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in September
Cool Valley, 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).
Cool Valley, Missouri, USA
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