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 September begins, there is a minor decrease in the average high-temperature, softly falling from 81.1°F (27.3°C) in August to a still moderately hot 75.4°F (24.1°C). During September nights, Dallas Center records an average temperature of 55.9°F (13.3°C).Humidity
In Dallas Center, the average relative humidity in September is 76%.Rainfall
In Dallas Center, Iowa, during September, the rain falls for 10.5 days and regularly aggregates up to 1.73" (44mm) of precipitation. Throughout the year, there are 112.7 rainfall days, and 16.06" (408mm) of precipitation is accumulated.Snowfall
In Dallas Center, Iowa, snow does not fall in June through September.Daylight
In September, the average length of the day in Dallas Center is 12h and 28min.On the first day of the month, sunrise is at 6:42 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:12 am and sunset at 6:58 pm CDT.
Sunshine
The average sunshine in September in Dallas Center is 9.3h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 4 during September translates into the following recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What are the temperatures in Dallas Center in September?
What is the average humidity in September in Dallas Center?
How many days does it rain in September in Dallas Center?
When it does not snow in Dallas Center?
Does it snow in Dallas Center in September?
What is the average length of the day in September in Dallas Center?
What time are sunrise and sunset in September in Dallas Center?
How long on average sun shines in September in Dallas Center?
What is the UV index intensity in September in Dallas Center?
Average temperature in September
Dallas Center, IA
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is January (28°F).
- Average low temperature in September: 55.9°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in September
Dallas Center, 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
Dallas Center, IA
- Average wind speed in September: 8.1mph
The windiest months (with the highest average wind speed) are January and April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in September
Dallas Center, IA
- Average humidity in September: 76%
The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Dallas Center, IA
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is June (2.68").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in September
Dallas Center, IA
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is June (15.7 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in September
Dallas Center, IA
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Dallas Center, IA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Dallas Center, 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 12min).
- Average sunshine in September: 9h and 2min
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 18min).
Average sunshine days in September
Dallas Center, IA
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is November (22.1 days).
The month with the least sunshine days is June (11.9 days).
Average UV index in September
Dallas Center, IA
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Dallas Center, IA
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Dallas Center, IA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Dallas Center, Iowa, USA
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