September weather forecast
Arnolds Park, IA

Weather in September

The first month of the autumn, September, is also an agreeable month in Arnolds Park, Iowa, with an average temperature ranging between min 53.8°F (12.1°C) and max 72.7°F (22.6°C).

Temperature

In Arnolds Park, the average high-temperature in September is almost the same as in August - a pleasant 72.7°F (22.6°C). In September, the average low-temperature is 53.8°F (12.1°C).

Humidity

In September, the average relative humidity is 74%.

Rainfall

In Arnolds Park, during September, the rain falls for 12 days and regularly aggregates up to 2.2" (56mm) of precipitation. In Arnolds Park, during the entire year, the rain falls for 121.8 days and collects up to 23.27" (591mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In Arnolds Park, the average length of the day in September is 12h and 29min.
On the first day of the month, sunrise is at 6:44 am and sunset at 7:56 pm. On the last day of September, in Arnolds Park, sunrise is at 7:17 am and sunset at 7:03 pm CDT.

Sunshine

In September, the average sunshine in Arnolds Park is 9.1h.

UV index

In September, the average daily maximum UV index in Arnolds Park is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions - Protection against skin and eye damage is obliged. 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 average humidity in September in Arnolds Park?

In Arnolds Park, the average relative humidity in September is 74%.

How much does it rain in Arnolds Park in September?

In Arnolds Park, Iowa, in September, it is raining for 12 days, with typically 2.2" (56mm) of accumulated precipitation.

When it does not snow in Arnolds Park?

June through September are months without snowfall in Arnolds Park, Iowa.

Does it snow in Arnolds Park in September?

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

What is the average length of the day in September in Arnolds Park?

The average day length in September in Arnolds Park, Iowa, is 12h and 29min.

When are sunrise and sunset in September in Arnolds Park?

On the first day of September in Arnolds Park, sunrise is at 6:44 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 7:03 pm CDT.

How long on average sun shines in September in Arnolds Park?

The average sunshine duration in September in Arnolds Park, Iowa, is 9.1h.

What is the UV index reading in September in Arnolds Park?

In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.

Average temperature in September
Arnolds Park, IA

Average temperature in September - Arnolds Park, IA
  • Average high temperature in September: 72.7°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (22.8°F).

  • Average low temperature in September: 53.8°F

The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9.5°F).

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Average pressure in September
Arnolds Park, IA

Average pressure in September - Arnolds Park, IA
  • Average pressure in September: 30"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in September
Arnolds Park, IA

Average wind speed in September - Arnolds Park, IA
  • Average wind speed in September: 9.1mph

The windiest month (with the highest average wind speed) is January (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).

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Average humidity in September
Arnolds Park, IA

Average humidity in September - Arnolds Park, IA
  • Average humidity in September: 74%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (68%).

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Average rainfall in September
Arnolds Park, IA

Average rainfall in September - Arnolds Park, IA
  • Average rainfall in September: 2.2"

The wettest month (with the highest rainfall) is June (3.46").
The driest month (with the least rainfall) is January (0.83").

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Average rainfall days in September
Arnolds Park, IA

Average rainfall days in September - Arnolds Park, IA
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is June (16.1 days).
The month with the least rainy days is February (3 days).

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Average snowfall in September
Arnolds Park, IA

Average snowfall in September - Arnolds Park, IA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (5.04").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Arnolds Park, IA

Average snowfall days in September - Arnolds Park, IA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (11 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
Arnolds Park, IA

Average daylight in September / Average sunshine in September - Arnolds Park, IA
  • Average daylight in September: 12h and 29min

The month with the longest days is June (Average daylight: 15h and 21min).
The month with the shortest days is December (Average daylight: 9h and 2min).

  • Average sunshine in September: 9.1h

The month with the most sunshine is July (Average sunshine: 10.4h).
The month with the least sunshine is January (Average sunshine: 4h).

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Average sunshine days in September
Arnolds Park, IA

Average sunshine days in September - Arnolds Park, IA
  • Average sunshine days in September: 16 days

The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (10.8 days).

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Average UV index in September
Arnolds Park, IA

Average UV index in September - Arnolds Park, IA
  • Average UV index in September: 4

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February and November (UV index 1).

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Average cloud cover in September
Arnolds Park, IA

Average cloud cover in September - Arnolds Park, IA
  • Average cloud cover in September: 31

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in September
Arnolds Park, IA

Average visibility in September - Arnolds Park, 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).

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