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 beginning of September brings a minor change in the average high-temperature, shifting from a moderately hot 83.8°F (28.8°C) in August to a still warm 78.1°F (25.6°C). In the month of September, Chapel Hill's average low-temperature falls to a mild 59.2°F (15.1°C).Humidity
The average relative humidity in September is 76%.Rainfall
In Chapel Hill, in September, it is raining for 11.1 days, with typically 2.13" (54mm) of accumulated precipitation. Throughout the year, there are 130.1 rainfall days, and 22.8" (579mm) of precipitation is accumulated.Snowfall
In Chapel Hill, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:45 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:11 am and sunset at 6:59 pm CDT.
Sunshine
In Chapel Hill, the average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The UV index of 5 during September leads to these advisories:
Take necessary precautions - Defending against sun damage is advocated. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How much 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 is the sunrise / sunset in September?
How many hours of sunshine does Chapel Hill have in September?
What is the UV index reading in September?
Average temperature in September
Chapel Hill, MO
- Average high temperature in September: 78.1°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (36.9°F).
- Average low temperature in September: 59.2°F
The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).
Average pressure in September
Chapel Hill, MO
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Chapel Hill, MO
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is March (10mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).
Average humidity in September
Chapel Hill, MO
- Average humidity in September: 76%
The months with the highest relative humidity are May and June (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Chapel Hill, MO
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is May (3.03").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in September
Chapel Hill, MO
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is May (14.9 days).
The month with the least rainy days is December (5.4 days).
Average snowfall in September
Chapel Hill, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.83").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Chapel Hill, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Chapel Hill, 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 July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in September
Chapel Hill, MO
- Average sunshine days in September: 16.7 days
The month with the most sunshine days is December (22 days).
The months with the least sunshine days are May and June (12.5 days).
Average UV index in September
Chapel Hill, 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, November and December (UV index 2).
Average cloud cover in September
Chapel Hill, MO
- Average cloud cover in September: 29
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Chapel Hill, 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).
Chapel Hill, Missouri, USA
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