September weather forecastBlakesburg, IA
September
Weather in September
The first month of the autumn, September, is still a warm month in Blakesburg, Iowa, with an average temperature fluctuating between 75.7°F (24.3°C) and 56.5°F (13.6°C).Temperature
September implies a soft temperature shift, with average high-temperatures reducing from August's warm 81.9°F (27.7°C) to a still moderately hot 75.7°F (24.3°C). Blakesburg's temperature drops to an average low of 56.5°F (13.6°C) during the nights of September.Humidity
In Blakesburg, the average relative humidity in September is 76%.Rainfall
In Blakesburg, in September, during 10.9 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. In Blakesburg, during the entire year, the rain falls for 119 days and collects up to 19.02" (483mm) of precipitation.Snowfall
In Blakesburg, snow does not fall in June through September.Daylight
In Blakesburg, the average length of the day in September is 12h and 27min.On the first day of September in Blakesburg, sunrise is at 6:38 am and sunset at 7:42 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:53 pm CDT.
Sunshine
In September, the average sunshine in Blakesburg is 9.3h.UV index
The average daily maximum UV index in September in Blakesburg is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 4 translates into these guidelines:
Undertake protective steps - Preventing sun damage is advised. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Blakesburg, IA
- Average high temperature in September: 75.7°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 (29.3°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (16.2°F).
Average pressure in September
Blakesburg, 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
Blakesburg, IA
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in September
Blakesburg, IA
- Average humidity in September: 76%
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Blakesburg, IA
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is June (2.99").
The driest month (with the least rainfall) is December (0.63").
Average rainfall days in September
Blakesburg, IA
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is January (4 days).
Average snowfall in September
Blakesburg, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.87").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Blakesburg, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Blakesburg, 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 18min).
- 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 6min).
Average sunshine days in September
Blakesburg, IA
- Average sunshine days in September: 17 days
The month with the most sunshine days is November (21.9 days).
The month with the least sunshine days is June (11.1 days).
Average UV index in September
Blakesburg, IA
- Average UV index in September: 4
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, October, November and December (UV index 2).
Average cloud cover in September
Blakesburg, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Blakesburg, IA
- 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).
