September weather forecast
Dallas Center, IA

Weather in September

September, the first month of the autumn in Dallas Center, is still a warm month, with an average temperature ranging between min 55.9°F (13.3°C) and max 75.4°F (24.1°C).

Temperature

In Dallas Center, the average high-temperature in September slightly decreases from 81.1°F (27.3°C) in August to a still moderately hot 75.4°F (24.1°C). The average low-temperature, in September, is 55.9°F (13.3°C).

Humidity

The average relative humidity in September is 76%.

Rainfall

In Dallas Center, in September, during 10.5 rainfall days, 1.73" (44mm) of precipitation is typically accumulated. In Dallas Center, during the entire year, the rain falls for 112.7 days and collects up to 16.06" (408mm) of precipitation.

Snowfall

June through September are months without snowfall in Dallas Center.

Daylight

In Dallas Center, Iowa, the average length of the day in September is 12h and 28min.
On the first day of the month, sunrise is at 6:41 am and sunset at 7:49 pm. On the last day of September, in Dallas Center, sunrise is at 7:11 am and sunset at 7:00 pm CDT.

Sunshine

In Dallas Center, the average sunshine in September is 9.3h.

UV index

The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Dallas Center?

In Dallas Center, Iowa, in September, the average high-temperature is 75.4°F (24.1°C), and the average low-temperature is 55.9°F (13.3°C). in August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is evaluated at 86°F (30°C).

What is the average humidity in September in Dallas Center?

The average relative humidity in September in Dallas Center, Iowa, is 76%.

How much does it rain in Dallas Center in September?

In Dallas Center, during September, the rain falls for 10.5 days and regularly aggregates up to 1.73" (44mm) of precipitation.

When it does not snow in Dallas Center?

June through September are months without snowfall in Dallas Center.

Does it snow in Dallas Center in September?

In Dallas Center, Iowa, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Dallas Center have in September?

In September, the average day length in Dallas Center is 12h and 28min.

When are sunrise and sunset in September in Dallas Center?

In September, on the first day of the month, sunrise is at 6:41 am and sunset at 7:49 pm. On the last day of the month, in Dallas Center, Iowa, sunrise is at 7:11 am and sunset at 7:00 pm CDT.

How many hours of sunshine does Dallas Center have in September?

The average sunshine duration in September is 9.3h.

What is the UV index reading in September in Dallas Center?

In September, the average daily maximum UV index in Dallas Center is 4. A UV Index reading of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Dallas Center, IA

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).

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Average pressure in September
Dallas Center, IA

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).

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Average wind speed in September
Dallas Center, IA

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).

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Average humidity in September
Dallas Center, IA

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%).

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Average rainfall in September
Dallas Center, IA

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").

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Average rainfall days in September
Dallas Center, IA

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).

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Average snowfall in September
Dallas Center, IA

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").

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Average snowfall days in September
Dallas Center, IA

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).

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Average daylight in September /
Average sunshine in September
Dallas Center, IA

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).

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Average sunshine days in September
Dallas Center, IA

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).

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Average UV index in September
Dallas Center, IA

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).

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Average cloud cover in September
Dallas Center, IA

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).

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Average visibility in September
Dallas Center, IA

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).

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