January 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 January

January in Iowa City presents the coldest conditions of the year. Freezing temperatures persist throughout the day with the highest reading a mere 27.3°F (-2.6°C) and dipping as low as 15.3°F (-9.3°C). Snowfall often blankets the city, accompanied by chilly winds. Delicate, intricate frost patterns adorn windows and other surfaces. Bright, clear winter days are fewer due to reduced daylight times.

Temperature

With average temperatures fluctuating between a high of 27.3°F (-2.6°C) and a low of 15.3°F (-9.3°C), January stands out as the coldest month.

Humidity

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

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

Months with snowfall are January through April, October through December. January is the month with the most snowfall. Snow falls for 10.9 days and accumulates 5.28" (134mm) of snow.

Daylight

The average length of the day in January is 9h and 34min.
On the first day of the month, sunrise is at 7:32 am and sunset at 4:46 pm. On the last day of January, sunrise is at 7:19 am and sunset at 5:19 pm CST.

Sunshine

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

UV index

January is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for average individuals.
Note: A daily high UV index of 1 in January leads to these guidelines:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.

Frequently asked questions

What is the coldest month?

January stands out as Iowa City's coldest month, with temperatures ranging between an average high of 27.3°F (-2.6°C) and a low of 15.3°F (-9.3°C).

How cold is it in January?

The average high-temperature, in January, in Iowa City, is 27.3°F (-2.6°C), while the average low-temperature is 15.3°F (-9.3°C).

What is the most humid month?

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

What is the average humidity in January?

In January, the average relative humidity is 83%.

What is the driest month?

The months with the least rainfall 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 January, the rain falls for 5.7 days. Throughout January, 1.34" (34mm) of precipitation is accumulated.

When does it snow the most?

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.

How many days does it snow in January?

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

What is the average length of the day in January?

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

When are sunrise and sunset in January?

In January, on the first day of the month, sunrise is at 7:32 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 5:19 pm CST.

What is the month with the least sunshine?

January has the least sunshine of the year, with an average of 4.2h of sunshine.

How long on average sun shines 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?

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

What is the UV index intensity in January?

In Iowa City, the average daily maximum UV index in January is 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation.
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 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).

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).

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).

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%).

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").

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).

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").

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).

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 4min

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 January: 4h and 1min

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 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).

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).

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).

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).

Iowa City, Iowa, USA

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