September weather forecastBrighton, MO
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Brighton, Missouri, with an average temperature fluctuating between 60.1°F (15.6°C) and 80.2°F (26.8°C).Temperature
Brighton observes a small decrease in the average high-temperature with the arrival of September, falling from August's hot 87.1°F (30.6°C) to a moderately hot 80.2°F (26.8°C). Brighton observes an average low-temperature of 60.1°F (15.6°C) during September nights.Humidity
The average relative humidity in September in Brighton, Missouri, is 74%.Rainfall
In Brighton, in September, during 13 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. In Brighton, during the entire year, the rain falls for 148.3 days and collects up to 32.64" (829mm) of precipitation.Snowfall
In Brighton, Missouri, snow does not fall in June through October.Daylight
The average length of the day in September in Brighton is 12h and 25min.On the first day of the month, sunrise is at 6:44 am and sunset at 7:41 pm. On the last day of September, sunrise is at 7:08 am and sunset at 6:57 pm CDT.
Sunshine
In September, the average sunshine in Brighton is 9.5h.UV index
In Brighton, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In September, the maximum UV index of 5 suggests these recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. The solar radiation around mid-day is intense; avoid the Sun and stay safe. 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
Average temperature in September
Brighton, MO
- Average high temperature in September: 80.2°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (41°F).
- Average low temperature in September: 60.1°F
The month with the highest average low temperature is July (68.7°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).
Average pressure in September
Brighton, MO
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are April and June (29.93"Hg).
Average wind speed in September
Brighton, MO
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is March (10.1mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity in September
Brighton, MO
- Average humidity in September: 74%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Brighton, MO
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is May (5.28").
The driest months (with the least rainfall) are January and December (1.57").
Average rainfall days in September
Brighton, MO
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is May (17.4 days).
The months with the least rainy days are January and December (6.9 days).
Average snowfall in September
Brighton, MO
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.64").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Brighton, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Brighton, MO
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in September: 9h and 30min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in September
Brighton, MO
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in September
Brighton, 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
Brighton, MO
- Average cloud cover in September: 29
The month with the most cloud cover is March (Cloud cover 47).
The months with the least cloud cover are June, July and August (Cloud cover 27).
Average visibility in September
Brighton, 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).
