September weather forecast
Clearfield, IA

Weather in September

September, the first month of the autumn in Clearfield, is also a moderately hot month, with an average temperature varying between 76.1°F (24.5°C) and 56.5°F (13.6°C).

Temperature

In Clearfield, the average high-temperature in September marginally drops from a warm 82°F (27.8°C) in August to a still moderately hot 76.1°F (24.5°C). The average low-temperature, in Clearfield, is 56.5°F (13.6°C).

Humidity

In September, the average relative humidity in Clearfield is 75%.

Rainfall

In September, in Clearfield, the rain falls for 11.6 days. Throughout September, 1.85" (47mm) of precipitation is accumulated. In Clearfield, during the entire year, the rain falls for 123.8 days and collects up to 21.93" (557mm) of precipitation.

Snowfall

In Clearfield, snow does not fall in June through September.

Daylight

In September, the average length of the day in Clearfield is 12h and 27min.
On the first day of September, sunrise is at 6:44 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 7:02 pm CDT.

Sunshine

In September, the average sunshine is 9.3h.

UV index

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 unsafe exposure to UV radiation for the average person.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
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 Clearfield?

The average high-temperature, in September, in Clearfield, Iowa, is 76.1°F (24.5°C), while the average low-temperature is 56.5°F (13.6°C). The average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, in August is computed to be 87.8°F (31°C).

What is the average humidity in September in Clearfield?

The average relative humidity in September in Clearfield is 75%.

How much does it rain in Clearfield in September?

In Clearfield, Iowa, in September, it is raining for 11.6 days, with typically 1.85" (47mm) of accumulated precipitation.

When it does not snow in Clearfield?

In Clearfield, snow does not fall in June through September.

Does it snow in Clearfield in September?

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

How many hours of daylight does Clearfield have in September?

The average day length in September is 12h and 27min.

When is the sunrise / sunset in September in Clearfield?

In September, on the first day of the month, sunrise is at 6:44 am and sunset at 7:50 pm. On the last day of the month, in Clearfield, Iowa, sunrise is at 7:13 am and sunset at 7:02 pm CDT.

How long on average sun shines in September in Clearfield?

The average sunshine duration in September in Clearfield, Iowa, is 9.3h.

What is the UV index intensity in September in Clearfield?

In Clearfield, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
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
Clearfield, IA

Average temperature in September - Clearfield, IA
  • Average high temperature in September: 76.1°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (30.7°F).

  • Average low temperature in September: 56.5°F

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).

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Average pressure in September
Clearfield, IA

Average pressure in September - Clearfield, IA
  • Average pressure in September: 30.01"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in September
Clearfield, IA

Average wind speed in September - Clearfield, IA
  • Average wind speed in September: 7.9mph

The windiest month (with the highest average wind speed) is March (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).

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Average humidity in September
Clearfield, IA

Average humidity in September - Clearfield, IA
  • Average humidity in September: 75%

The month with the highest relative humidity is June (81%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in September
Clearfield, IA

Average rainfall in September - Clearfield, IA
  • Average rainfall in September: 1.85"

The wettest month (with the highest rainfall) is June (3.78").
The driest month (with the least rainfall) is February (0.63").

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Average rainfall days in September
Clearfield, IA

Average rainfall days in September - Clearfield, IA
  • Average rainfall days in September: 11.6 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (3.9 days).

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Average snowfall in September
Clearfield, IA

Average snowfall in September - Clearfield, IA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (3.15").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Clearfield, IA

Average snowfall days in September - Clearfield, IA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (8.3 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
Clearfield, IA

Average daylight in September / Average sunshine in September - Clearfield, 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 2min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

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Average sunshine days in September
Clearfield, IA

Average sunshine days in September - Clearfield, IA
  • Average sunshine days in September: 16.6 days

The month with the most sunshine days is November (21.9 days).
The month with the least sunshine days is May (11.1 days).

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Average UV index in September
Clearfield, IA

Average UV index in September - Clearfield, IA
  • Average UV index in September: 5

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
Clearfield, IA

Average cloud cover in September - Clearfield, IA
  • Average cloud cover in September: 28

The month with the most cloud cover is January (Cloud cover 49).
The months with the least cloud cover are July and September (Cloud cover 28).

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Average visibility in September
Clearfield, IA

Average visibility in September - Clearfield, 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).

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