September weather forecastBethany, MO
September
Weather in September
September marks the start of the autumn season in Bethany, and residents begin to experience a significant drop in temperatures from August. The decline from the regular summer weather shifts towards the cooler autumn spectrum during this period. Bethany, Missouri sees a moderate amount of precipitation in September, with the city getting an average of 2.48" (63mm) of rainfall over approximately 11.3 days. The wind speed tends to pick up, and daylight hours contract rather rapidly as autumn advances. The end of September typically exhibits the transition to shorter sunshine hours and the greening of leaves, indicating the impending fall season.Temperature
A mild drop in Bethany's average high-temperature is observed in September, transitioning from 82.4°F (28°C) in August to a still warm 76.8°F (24.9°C). In Bethany, the expected average low-temperature for September is a moderate 57.4°F (14.1°C).Humidity
In September, the average relative humidity is 76%.Rainfall
In Bethany, during September, the rain falls for 11.3 days and regularly aggregates up to 2.48" (63mm) of precipitation. In Bethany, during the entire year, the rain falls for 129.2 days and collects up to 25.35" (644mm) of precipitation.Snowfall
June through September are months without snowfall in Bethany.Daylight
In September, the average length of the day in Bethany, Missouri, is 12h and 26min.On the first day of the month, sunrise is at 6:44 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:12 am and sunset at 6:59 pm CDT.
Sunshine
In Bethany, the average sunshine in September is 9.3h.UV index
In Bethany, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the average person.Note: A maximum UV index of 5 in September translates into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bethany, MO
- Average high temperature in September: 76.8°F
The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in September: 57.4°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).
Average pressure in September
Bethany, 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 (29.88"Hg).
Average wind speed in September
Bethany, MO
- Average wind speed in September: 7.4mph
The windiest month (with the highest average wind speed) is March (10mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in September
Bethany, MO
- Average humidity in September: 76%
The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Bethany, MO
- Average rainfall in September: 2.48"
The wettest month (with the highest rainfall) is June (3.86").
The driest months (with the least rainfall) are January and February (0.91").
Average rainfall days in September
Bethany, MO
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in September
Bethany, MO
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.62").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Bethany, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Bethany, MO
- Average daylight in September: 12h and 24min
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 24min).
- Average sunshine in September: 9h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in September
Bethany, MO
- Average sunshine days in September: 17 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in September
Bethany, 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
Bethany, MO
- Average cloud cover in September: 29
The months with the most cloud cover are January and March (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Bethany, 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).
