September weather forecastCascade, IA
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Cascade, Iowa, with an average temperature varying between 53.4°F (11.9°C) and 72.7°F (22.6°C).Temperature
September's arrival aligns with a minor decrease in average high-temperatures, from August's warm 78.6°F (25.9°C) to an agreeable 72.7°F (22.6°C). Cascade's temperature in September lowers to a consistent average of 53.4°F (11.9°C) during the nights.Humidity
The average relative humidity in September is 79%.Rainfall
In September, the rain falls for 11.9 days. Throughout September, 2.64" (67mm) of precipitation is accumulated. Throughout the year, there are 140.9 rainfall days, and 28.7" (729mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Cascade, Iowa, the average length of the day in September is 12h and 28min.On the first day of September, sunrise is at 6:30 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:46 pm CDT.
Sunshine
The average sunshine in September is 9.1h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The daily high UV index of 4 during September translates into the following recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cascade, IA
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (24.6°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in September
Cascade, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Cascade, IA
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in September
Cascade, IA
- Average humidity in September: 79%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Cascade, IA
- Average rainfall in September: 2.64"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is January (1.22").
Average rainfall days in September
Cascade, IA
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is June (18 days).
The month with the least rainy days is January (4.7 days).
Average snowfall in September
Cascade, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.96").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Cascade, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Cascade, IA
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 9h and 6min
The months with the most sunshine are July and August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Cascade, IA
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is December (17.3 days).
The month with the least sunshine days is June (10.3 days).
Average UV index in September
Cascade, IA
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Cascade, IA
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Cascade, IA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).
