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
Rockwell City in September witnesses an average high-temperature of a still moderately hot 74.3°F (23.5°C), indicating a slight variation from August's 79.2°F (26.2°C). Rockwell City's temperature in September lowers to a consistent average of 55.2°F (12.9°C) during the nights.Humidity
The average relative humidity in September in Rockwell City is 75%.Rainfall
In Rockwell City, in September, it is raining for 12.2 days, with typically 2.56" (65mm) of accumulated precipitation. In Rockwell City, during the entire year, the rain falls for 128 days and collects up to 26.18" (665mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Rockwell City, the average length of the day in September is 12h and 28min.On the first day of the month, sunrise is at 6:44 am and sunset at 7:52 pm. On the last day of September, sunrise is at 7:15 am and sunset at 7:01 pm CDT.
Sunshine
The average sunshine in September is 9.2h.UV index
In Rockwell City, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: An average UV index of 4 in September transforms into this advice:
Guard yourself - An obligation to protect skin and eyes from harm exists. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Rockwell City in September?
What is the average humidity in September in Rockwell City?
How many days does it rain in September in Rockwell City?
When it does not snow in Rockwell City?
Does it snow in Rockwell City in September?
How many hours of daylight does Rockwell City have in September?
When is the sunrise / sunset in September in Rockwell City?
How long on average sun shines in September in Rockwell City?
What is the UV index reading in September in Rockwell City?
Average temperature in September
Rockwell City, IA
- Average high temperature in September: 74.3°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 (25.2°F).
- Average low temperature in September: 55.2°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).
Average pressure in September
Rockwell City, IA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Rockwell City, IA
- Average wind speed in September: 8.5mph
The windiest months (with the highest average wind speed) are January and April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in September
Rockwell City, IA
- Average humidity in September: 75%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are April and October (68%).
Average rainfall in September
Rockwell City, IA
- Average rainfall in September: 2.56"
The wettest month (with the highest rainfall) is June (3.98").
The driest month (with the least rainfall) is January (0.91").
Average rainfall days in September
Rockwell City, IA
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is June (17.6 days).
The month with the least rainy days is February (3 days).
Average snowfall in September
Rockwell City, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.31").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Rockwell City, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rockwell City, IA
- Average daylight in September: 12h and 3min
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 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 6min).
Average sunshine days in September
Rockwell City, IA
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is June (9.9 days).
Average UV index in September
Rockwell City, IA
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in September
Rockwell City, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July and September (Cloud cover 30).
Average visibility in September
Rockwell City, IA
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Rockwell City, Iowa, USA
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