September weather forecastBooneville, IA
September
Weather in September
The first month of the autumn, September, is still a warm month in Booneville, Iowa, with temperature in the range of an average low of 55.9°F (13.3°C) and an average high of 75.4°F (24.1°C).Temperature
September signals a slight drop in average high-temperature, sliding from August's warm 81.3°F (27.4°C) to a still moderately hot 75.4°F (24.1°C). Booneville records a consistent low-temperature of 55.9°F (13.3°C) during September nights.Humidity
In September, the average relative humidity is 76%.Rainfall
In Booneville, in September, during 8.5 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. In Booneville, during the entire year, the rain falls for 93.7 days and collects up to 8.78" (223mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Booneville, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:42 am and sunset at 7:48 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:58 pm CDT.
Sunshine
The average sunshine in September is 9.3h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Booneville, IA
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in September: 55.9°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure in September
Booneville, IA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Booneville, IA
- Average wind speed in September: 8mph
The windiest months (with the highest average wind speed) are January, February, March and April (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in September
Booneville, IA
- Average humidity in September: 76%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Booneville, IA
- Average rainfall in September: 0.91"
The wettest months (with the highest rainfall) are May and June (1.46").
The driest month (with the least rainfall) is January (0.28").
Average rainfall days in September
Booneville, IA
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is May (13.6 days).
The months with the least rainy days are January and February (2.7 days).
Average snowfall in September
Booneville, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.22").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Booneville, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Booneville, IA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 9h and 18min
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 18min).
Average sunshine days in September
Booneville, IA
- Average sunshine days in September: 19.3 days
The month with the most sunshine days is December (24.8 days).
The month with the least sunshine days is June (13.5 days).
Average UV index in September
Booneville, IA
- 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
Booneville, IA
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 53).
The months with the least cloud cover are July and September (Cloud cover 29).
Average visibility in September
Booneville, IA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
