September weather forecastCarlisle, IA
September
Weather in September
September, the first month of the autumn in Carlisle, is also a moderately hot month, with an average temperature ranging between max 76.1°F (24.5°C) and min 55.9°F (13.3°C).Temperature
Carlisle's progression into September involves a minor drop in the average high-temperature, slightly receding from a warm 81.5°F (27.5°C) in August to a still moderately hot 76.1°F (24.5°C). Carlisle records an average nighttime low of 55.9°F (13.3°C) in September.Humidity
In Carlisle, the average relative humidity in September is 76%.Rainfall
In Carlisle, in September, it is raining for 11.5 days, with typically 2.6" (66mm) of accumulated precipitation. Throughout the year, there are 124.7 rainfall days, and 26.34" (669mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:10 am and sunset at 6:56 pm CDT.
Sunshine
The average sunshine in September is 9.1h.UV index
In Carlisle, Iowa, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In September, the UV index of 4 transforms into the following advice:
Exercise prevention - Warding off sunburn is urged. The Sun's radiation is especially intense around midday; try to stay in shade during this period. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Carlisle, IA
- Average high temperature in September: 76.1°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in September: 55.9°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure in September
Carlisle, IA
- 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 (29.89"Hg).
Average wind speed in September
Carlisle, IA
- Average wind speed in September: 7.9mph
The windiest months (with the highest average wind speed) are March and April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in September
Carlisle, IA
- Average humidity in September: 76%
The months with the highest relative humidity are January, February and June (82%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Carlisle, IA
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is January (0.91").
Average rainfall days in September
Carlisle, IA
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (4 days).
Average snowfall in September
Carlisle, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.37").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Carlisle, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Carlisle, 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 6min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Carlisle, IA
- Average sunshine days in September: 17.1 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (11.7 days).
Average UV index in September
Carlisle, 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
Carlisle, IA
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July, August and September (Cloud cover 31).
Average visibility in September
Carlisle, IA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
