September weather forecast
Ainsworth, IA

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Ainsworth, Iowa, with an average temperature fluctuating between 75.6°F (24.2°C) and 56.3°F (13.5°C).

Temperature

Ainsworth in September experiences a gentle temperature dip, with average high-temperatures reducing from a warm 81.1°F (27.3°C) in August to a still moderately hot 75.6°F (24.2°C). Throughout the month of September, Ainsworth observes an average nighttime temperature of 56.3°F (13.5°C).

Humidity

In Ainsworth, the average relative humidity in September is 76%.

Rainfall

In Ainsworth, during September, the rain falls for 9.5 days and regularly aggregates up to 1.65" (42mm) of precipitation. Throughout the year, in Ainsworth, there are 123.7 rainfall days, and 18.94" (481mm) of precipitation is accumulated.

Snowfall

In Ainsworth, Iowa, snow does not fall in May through September.

Daylight

The average length of the day in September in Ainsworth is 12h and 28min.
On the first day of the month, sunrise is at 6:33 am and sunset at 7:38 pm. On the last day of September, in Ainsworth, sunrise is at 7:02 am and sunset at 6:49 pm CDT.

Sunshine

The average sunshine in September is 9.5h.

UV index

The average daily maximum UV index in September in Ainsworth is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Put precautions into practice - Protective measures against sun-induced damage are advised. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September in Ainsworth?

Ainsworth in September has an average high-temperature of 75.6°F (24.2°C) and an average low-temperature of 56.3°F (13.5°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, in August is evaluated at 86°F (30°C).

What is the average humidity in September in Ainsworth?

In Ainsworth, Iowa, the average relative humidity in September is 76%.

How many days does it rain in September in Ainsworth?

In September, in Ainsworth, the rain falls for 9.5 days. Throughout September, 1.65" (42mm) of precipitation is accumulated.

When it does not snow in Ainsworth?

In Ainsworth, snow does not fall in May through September.

Does it snow in Ainsworth in September?

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

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

In September, the average day length in Ainsworth, Iowa, is 12h and 28min.

When is the sunrise / sunset in September in Ainsworth?

On the first day of September in Ainsworth, Iowa, sunrise is at 6:33 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:49 pm CDT.

How long on average sun shines in September in Ainsworth?

In Ainsworth, the average sunshine duration in September is 9.5h.

What is the UV index intensity in September in Ainsworth?

In Ainsworth, Iowa, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health risk 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
Ainsworth, IA

Average temperature in September - Ainsworth, IA
  • Average high temperature in September: 75.6°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (28.8°F).

  • Average low temperature in September: 56.3°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 (16.5°F).

Average pressure in September
Ainsworth, IA

Average pressure in September - Ainsworth, IA
  • Average pressure in September: 30.02"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in September
Ainsworth, IA

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

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).

Average humidity in September
Ainsworth, IA

Average humidity in September - Ainsworth, IA
  • Average humidity in September: 76%

The months with the highest relative humidity are January and July (83%).
The month with the lowest relative humidity is October (72%).

Average rainfall in September
Ainsworth, IA

Average rainfall in September - Ainsworth, IA
  • Average rainfall in September: 1.65"

The wettest month (with the highest rainfall) is May (2.91").
The driest month (with the least rainfall) is December (0.71").

Average rainfall days in September
Ainsworth, IA

Average rainfall days in September - Ainsworth, IA
  • Average rainfall days in September: 9.5 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (4.2 days).

Average snowfall in September
Ainsworth, IA

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

The month with the highest snowfall is January (2.52").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in September
Ainsworth, IA

Average snowfall days in September - Ainsworth, 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 May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Ainsworth, IA

Average daylight in September / Average sunshine in September - Ainsworth, 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 3min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

Average sunshine days in September
Ainsworth, IA

Average sunshine days in September - Ainsworth, IA
  • Average sunshine days in September: 18.1 days

The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is May (10.9 days).

Average UV index in September
Ainsworth, IA

Average UV index in September - Ainsworth, IA
  • Average UV index in September: 4

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).

Average cloud cover in September
Ainsworth, IA

Average cloud cover in September - Ainsworth, IA
  • Average cloud cover in September: 29

The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are August and September (Cloud cover 29).

Average visibility in September
Ainsworth, IA

Average visibility in September - Ainsworth, IA
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).

Ainsworth, Iowa, USA

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