Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
As Red Oak, Iowa, transitions from August to September, the average high-temperatures adjust to a still warm 76.6°F (24.8°C), nearly the same as the previous 81.9°F (27.7°C). Red Oak witnesses a consistent average low-temperature of 56.5°F (13.6°C) throughout September.Humidity
The average relative humidity in September is 74%.Rainfall
In September, in Red Oak, the rain falls for 11.5 days. Throughout September, 1.77" (45mm) of precipitation is accumulated. Throughout the year, there are 117.2 rainfall days, and 21.77" (553mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Red Oak, Iowa, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:48 am and sunset at 7:52 pm. On the last day of September, in Red Oak, sunrise is at 7:17 am and sunset at 7:03 pm CDT.
Sunshine
In September, the average sunshine in Red Oak, Iowa, is 9.1h.UV index
In Red Oak, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Ensure safety - Sun damage prevention is strongly urged. It's recommended to limit sun exposure when its radiation is at its peak during midday. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Frequently asked questions
What are the temperatures in Red Oak in September?
What is the average humidity in September in Red Oak?
How many days does it rain in September in Red Oak?
When it does not snow in Red Oak?
Does it snow in Red Oak in September?
How many hours of daylight does Red Oak have in September?
When are sunrise and sunset in September in Red Oak?
How many hours of sunshine does Red Oak have in September?
What is the UV index intensity in September in Red Oak?
Average temperature in September
Red Oak, IA
- Average high temperature in September: 76.6°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (30°F).
- Average low temperature in September: 56.5°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (16.7°F).
Average pressure in September
Red Oak, IA
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Red Oak, IA
- Average wind speed in September: 8.1mph
The windiest months (with the highest average wind speed) are March and April (10.4mph).
The calmest month (with the lowest average wind speed) is July (6.8mph).
Average humidity in September
Red Oak, IA
- Average humidity in September: 74%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is October (68%).
Average rainfall in September
Red Oak, IA
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is June (4.06").
The driest months (with the least rainfall) are January and February (0.63").
Average rainfall days in September
Red Oak, IA
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in September
Red Oak, IA
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.68").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Red Oak, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.9 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
Red Oak, IA
- Average daylight in September: 12h and 3min
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 1min
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 36min).
Average sunshine days in September
Red Oak, IA
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is December (23.1 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in September
Red Oak, IA
- Average UV index in September: 5
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
Red Oak, IA
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in September
Red Oak, 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).
Red Oak, Iowa, USA
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