October weather forecast
Iowa City, IA

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Golden and brown trees in a scenic, neat lawn near the mighty grandeur of the Old Capitol building, Iowa City
Golden and brown trees in a scenic, neat lawn near the mighty grandeur of the Old Capitol building, Iowa City

Weather in October

The trend of falling temperatures continues in October, ending in an average low of 45°F (7.2°C) by the month’s end. Winter coats, scarves, and hats slowly start replacing light fall wear, making their first appearances after the summer hiatus. With rainfall remaining fairly constant and daylight hours reducing further, the city bids farewell to the last of the warm, sunlit days.

Temperature

The arrival of October signals a clear decrease in the average high-temperature, falling from a moderately hot 75.2°F (24°C) in September to a refreshing 60.4°F (15.8°C). Iowa City, in October, witnesses an average low-temperature of 45°F (7.2°C).

Humidity

October is the least humid month, with an average relative humidity of 72%.

Rainfall

In Iowa City, in October, during 11.5 rainfall days, 2.48" (63mm) of precipitation is typically accumulated. Throughout the year, there are 140.4 rainfall days, and 29.57" (751mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. October is the first month it typically snows. Throughout October, in the average 0.5 snowfall days, it receives 0.71" (18mm) of snow. Throughout the year, in Iowa City, there are 37.7 snowfall days, and 16.42" (417mm) of snow is accumulated.

Daylight

In Iowa City, the average length of the day in October is 11h and 4min.
On the first day of the month, sunrise is at 7:03 am and sunset at 6:47 pm. On the last day of October, sunrise is at 7:37 am and sunset at 6:01 pm CDT.

Sunshine

In Iowa City, Iowa, the average sunshine in October is 5.5h.

UV index

In October, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the average person.
Note: In October, a daily UV index of 2 turns into the following recommendations:
Infants, children, and people with sensitive skin should always have protection against lengthy periods of sun exposure. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Observe! Snow reflection can nearly intensify the Sun's UV radiation twofold.
Updated: Jul 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Iowa City in October?

October temperatures vary between a high-temperature of 60.4°F (15.8°C) and a low-temperature of 45°F (7.2°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, in August is estimated at 86°F (30°C).

What is the least humid month?

With an average relative humidity of 72%, October is the least humid month.

What is the average humidity in October?

The average relative humidity in October is 72%.

How many days does it rain in October?

In Iowa City, in October, during 11.5 rainfall days, 2.48" (63mm) of precipitation is typically accumulated.

When does it start to snow?

October is the first month it typically snows. Throughout October, in the average 0.5 snowfall days, it receives 0.71" (18mm) of snow.

How many hours of daylight does Iowa City have in October?

The average day length in October is 11h and 4min.

When are sunrise and sunset in October?

On the first day of October, sunrise is at 7:03 am and sunset at 6:47 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 6:01 pm CDT.

How many hours of sunshine does Iowa City have in October?

In Iowa City, the average sunshine duration in October is 5.5h.

What is the UV index intensity in October in Iowa City?

The average daily maximum UV index in October is 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Iowa City, IA

Average temperature in October - Iowa City, IA
  • Average high temperature in October: 60.4°F

The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (27.3°F).

  • Average low temperature in October: 45°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).

Average pressure in October
Iowa City, IA

Average pressure in October - Iowa City, IA
  • Average pressure in October: 30.01"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 October
Iowa City, IA

Average wind speed in October - Iowa City, IA
  • Average wind speed in October: 9.6mph

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).

Average humidity in October
Iowa City, IA

Average humidity in October - Iowa City, IA
  • Average humidity in October: 72%

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 October
Iowa City, IA

Average rainfall in October - Iowa City, IA
  • Average rainfall in October: 2.48"

The wettest month (with the highest rainfall) is May (4.69").
The driest months (with the least rainfall) are January and February (1.34").

Average rainfall days in October
Iowa City, IA

Average rainfall days in October - Iowa City, IA
  • Average rainfall days in October: 11.5 days

The month with the highest number of rainy days is May (18.4 days).
The month with the least rainy days is February (5 days).

Average snowfall in October
Iowa City, IA

Average snowfall in October - Iowa City, IA
  • Average snowfall in October: 0.71"

The month with the highest snowfall is January (5.28").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in October
Iowa City, IA

Average snowfall days in October - Iowa City, IA
  • Average snowfall days in October: 0.5 days

The month with the highest number of snowfall days is January (10.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in October /
Average sunshine in October
Iowa City, IA

Average daylight in October / Average sunshine in October - Iowa City, IA
  • Average daylight in October: 11h and 1min

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 October: 5h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).

Average sunshine days in October
Iowa City, IA

Average sunshine days in October - Iowa City, IA
  • Average sunshine days in October: 17.9 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is May (10 days).

Average UV index in October
Iowa City, IA

Average UV index in October - Iowa City, IA
  • Average UV index in October: 2

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 October
Iowa City, IA

Average cloud cover in October - Iowa City, IA
  • Average cloud cover in October: 38

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in October
Iowa City, IA

Average visibility in October - Iowa City, IA
  • Average visibility in October: 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).

Iowa City, Iowa, USA

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