September weather forecast
Clearfield, IA

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Weather in September

The first month of the autumn, September, is still a warm month in Clearfield, Iowa, with an average temperature ranging between max 76.1°F (24.5°C) and min 56.5°F (13.6°C).

Temperature

As Clearfield enters September, the average high-temperature subtly lowers from the a moderately hot 82°F (27.8°C) of August to a still warm 76.1°F (24.5°C). The low-temperature averages to a refreshing 56.5°F (13.6°C) during the nights of September.

Humidity

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

Rainfall

In Clearfield, in September, it is raining for 11.6 days, with typically 1.85" (47mm) of accumulated precipitation. Throughout the year, in Clearfield, there are 123.8 rainfall days, and 21.93" (557mm) of precipitation is accumulated.

Snowfall

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

Daylight

In Clearfield, the average length of the day in September is 12h and 27min.
On the first day of September, sunrise is at 6:45 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 7:01 pm CDT.

Sunshine

In Clearfield, the average sunshine in September is 9.3h.

UV index

In Clearfield, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index of 5 during September translates into these guidelines:
Exercise prevention - Precautions against solar damage are endorsed. When the Sun is at its strongest around midday, find shade and limit exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Updated: Feb 12, 2024 | Published by: Weather U.S. | About Us

Frequently asked questions

What is the average September temperature in Clearfield?

The average high-temperature and low-temperature in Clearfield, Iowa, during September are 76.1°F (24.5°C) and 56.5°F (13.6°C) respectively. In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, is appraised at 87.8°F (31°C).

What is the average humidity in September in Clearfield?

In September, the average relative humidity is 75%.

How much does it rain in Clearfield in September?

In Clearfield, Iowa, in September, during 11.6 rainfall days, 1.85" (47mm) of precipitation is typically accumulated.

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

What is the average length of the day in September in Clearfield?

The average day length in September in Clearfield, Iowa, 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 6:45 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 7:01 pm CDT.

How many hours of sunshine does Clearfield have in September?

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

How high is the UV index in September in Clearfield?

In September, the average daily maximum UV index in Clearfield is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to 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
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).

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).

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).

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%).

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").

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).

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").

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).

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).

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).

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).

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).

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).

Clearfield, Iowa, USA

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