September weather forecastWashburn, IA
September
Weather in September
September, the first month of the autumn in Washburn, is still a pleasant month, with an average temperature varying between 73.2°F (22.9°C) and 54.5°F (12.5°C).Temperature
September ushers in a minor alteration in Washburn's climate, with the average high-temperature moving from August's moderately hot 78.6°F (25.9°C) to an agreeable 73.2°F (22.9°C). Washburn, during the nights of September, experiences an average temperature drop to a fresh 54.5°F (12.5°C).Humidity
The average relative humidity in September is 78%.Rainfall
In Washburn, during September, the rain falls for 11.2 days and regularly aggregates up to 2.48" (63mm) of precipitation. In Washburn, Iowa, during the entire year, the rain falls for 133.6 days and collects up to 28.27" (718mm) of precipitation.Snowfall
In Washburn, Iowa, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 28min.On the first day of September, sunrise is at 6:35 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:51 pm CDT.
Sunshine
In September, the average sunshine is 9.1h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: An average UV index of 4 in September transforms into this advice:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Washburn, IA
- Average high temperature in September: 73.2°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in September: 54.5°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°F).
Average pressure in September
Washburn, IA
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Washburn, IA
- Average wind speed in September: 8.2mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in September
Washburn, IA
- Average humidity in September: 78%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Washburn, IA
- Average rainfall in September: 2.48"
The wettest month (with the highest rainfall) is June (4.29").
The driest months (with the least rainfall) are January and February (1.02").
Average rainfall days in September
Washburn, IA
- Average rainfall days in September: 11.2 days
The month with the highest number of rainy days is June (18.1 days).
The month with the least rainy days is February (4 days).
Average snowfall in September
Washburn, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.21").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Washburn, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Washburn, 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 month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Washburn, IA
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is October (17.8 days).
The month with the least sunshine days is June (10 days).
Average UV index in September
Washburn, IA
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Washburn, IA
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Washburn, IA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
