September weather forecastRobison-Whitaker Acres, IA
September
Weather in September
The first month of the autumn, September, is still a warm month in Robison-Whitaker Acres, Iowa, with an average temperature fluctuating between 55.6°F (13.1°C) and 74.7°F (23.7°C).Temperature
The onset of September notes an average high-temperature of a still warm 74.7°F (23.7°C), subtly shifted from August's 79.7°F (26.5°C). Nighttime temperature in Robison-Whitaker Acres experiences an average drop to a mild 55.6°F (13.1°C) in September.Humidity
In Robison-Whitaker Acres, the average relative humidity in September is 76%.Rainfall
In Robison-Whitaker Acres, during September, the rain falls for 10.6 days and regularly aggregates up to 2.91" (74mm) of precipitation. Throughout the year, in Robison-Whitaker Acres, there are 128.1 rainfall days, and 26.61" (676mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In Robison-Whitaker Acres, 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
In September, the average sunshine is 9.2h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, a daily UV index of 4 turns into the following recommendations:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Robison-Whitaker Acres, IA
- Average high temperature in September: 74.7°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in September: 55.6°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).
Average pressure in September
Robison-Whitaker Acres, IA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Robison-Whitaker Acres, IA
- Average wind speed in September: 8.3mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in September
Robison-Whitaker Acres, IA
- Average humidity in September: 76%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Robison-Whitaker Acres, IA
- Average rainfall in September: 2.91"
The wettest month (with the highest rainfall) is May (4.17").
The driest month (with the least rainfall) is January (0.91").
Average rainfall days in September
Robison-Whitaker Acres, IA
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in September
Robison-Whitaker Acres, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (3.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Robison-Whitaker Acres, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Robison-Whitaker Acres, 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 12min).
- Average sunshine in September: 9h and 12min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Robison-Whitaker Acres, IA
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (10.6 days).
Average UV index in September
Robison-Whitaker Acres, IA
- Average UV index in September: 4
The months with the highest UV index are June and July (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
Robison-Whitaker Acres, IA
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in September
Robison-Whitaker Acres, 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).
