January weather forecast
Iowa City, IA

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 January

January, like December, is a freezing cold winter month in Iowa City, Iowa, with an average temperature fluctuating between 15.3°F (-9.3°C) and 27.3°F (-2.6°C).

Temperature

January is the coldest month, with an average high-temperature of 27.3°F (-2.6°C) and an average low-temperature of 15.3°F (-9.3°C).

Humidity

The months with the highest humidity are January and July, with an average relative humidity of 83%.

Rainfall

January and February are months with the least rain when the rain falls for 5.7 days and typically aggregates up to 1.34" (34mm) of rain.

Snowfall

January through April, October through December are months with snowfall. The month with the most snowfall is January, when snow falls for 10.9 days and typically aggregates up to 5.28" (134mm) of snow.

Daylight

In January, the average length of the day is 9h and 34min.
On the first day of January in Iowa City, sunrise is at 7:33 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 5:20 pm CST.

Sunshine

With an average of 4.2h of sunshine, January has the least sunshine of the year in Iowa City.

UV index

The month with the lowest UV index in Iowa City, Iowa, is January, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 1 in January transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Iowa City?

January is the coldest month in Iowa City, with an average high-temperature of 27.3°F (-2.6°C) and an average low-temperature of 15.3°F (-9.3°C).

What is the most humid month in Iowa City?

The months with the highest humidity in Iowa City are January and July, with an average relative humidity of 83%.

What is the average humidity in January in Iowa City?

The average relative humidity in January in Iowa City, Iowa, is 83%.

What is the driest month in Iowa City?

The months with the least rainfall in Iowa City, Iowa, are January and February Rain falls for 5.7 days and accumulates 1.34" (34mm) of rain.

How many days does it rain in January in Iowa City?

In Iowa City, in January, during 5.7 rainfall days, 1.34" (34mm) of precipitation is typically accumulated.

What is the snowiest month in Iowa City?

The month with the most snowfall in Iowa City, Iowa, is January, when snow falls for 10.9 days and typically aggregates up to 5.28" (134mm) of snow.

How many days does it snow in January in Iowa City?

In Iowa City, Iowa, during January, snow falls for 10.9 days and regularly aggregates up to 5.28" (134mm) of snow.

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

In January, the average day length is 9h and 34min.

What time are sunrise and sunset in January in Iowa City?

On the first day of January, sunrise is at 7:33 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 5:20 pm CST.

What is the month with the least sunshine in Iowa City?

The month with the least sunshine in Iowa City, Iowa, is January, with an average of 4.2h of sunshine.

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

In Iowa City, the average sunshine duration in January is 4.2h.

What is the month with the lowest UV index in Iowa City?

January is the month with the lowest UV index in Iowa City, Iowa, with an average maximum UV index of 1.

How high is the UV index in January in Iowa City?

In Iowa City, Iowa, the average daily maximum UV index in January is 1. A UV Index value of 2, and less, symbolizes a low health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Iowa City, IA

Average temperature in January - Iowa City, IA
  • Average high temperature in January: 27.3°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 January: 15.3°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).

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Average pressure in January
Iowa City, IA

Average pressure in January - Iowa City, IA
  • Average pressure in January: 30.14"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).

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Average wind speed in January
Iowa City, IA

Average wind speed in January - Iowa City, IA
  • Average wind speed in January: 10.4mph

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).

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Average humidity in January
Iowa City, IA

Average humidity in January - Iowa City, IA
  • Average humidity in January: 83%

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

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Average rainfall in January
Iowa City, IA

Average rainfall in January - Iowa City, IA
  • Average rainfall in January: 1.34"

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

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Average rainfall days in January
Iowa City, IA

Average rainfall days in January - Iowa City, IA
  • Average rainfall days in January: 5.7 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).

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Average snowfall in January
Iowa City, IA

Average snowfall in January - Iowa City, IA
  • Average snowfall in January: 5.28"

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

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Average snowfall days in January
Iowa City, IA

Average snowfall days in January - Iowa City, IA
  • Average snowfall days in January: 10.9 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).

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

Average daylight in January / Average sunshine in January - Iowa City, IA
  • Average daylight in January: 9h and 34min

The month with the longest days is June (Average daylight: 15h and 9min).
The month with the shortest days is December (Average daylight: 9h and 13min).

  • Average sunshine in January: 4h and 12min

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).

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Average sunshine days in January
Iowa City, IA

Average sunshine days in January - Iowa City, IA
  • Average sunshine days in January: 16.3 days

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

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Average UV index in January
Iowa City, IA

Average UV index in January - Iowa City, IA
  • Average UV index in January: 1

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).

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Average cloud cover in January
Iowa City, IA

Average cloud cover in January - Iowa City, IA
  • Average cloud cover in January: 56

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

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Average visibility in January
Iowa City, IA

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

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