January weather forecast
Marshalltown, IA

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Weather in January

Marshalltown, Iowa starts the year with a typically cold winter month. In contrast to December, January sees higher snowfall with an average of 1.93" (49mm) covering the city in a beautiful winter cloak. Relative humidity hovers on the high side, adding to the feeling of a typical cold, frostbitten Iowa winter. The sunlight hours are the fewest, resulting in shorter days and longer nights. Despite this, the charm of the snowy landscape and crisp winter air makes Marshalltown an appealing destination even in the heart of winter.

Temperature

With an average high-temperature of 25.7°F (-3.5°C) and an average low-temperature of 12.7°F (-10.7°C), January is the coldest month in Marshalltown.

Humidity

The most humid month in Marshalltown is January, with an average relative humidity of 86%.

Rainfall

January is the month with the least rainfall in Marshalltown. Rain falls for 3.6 days and accumulates 0.43" (11mm) of precipitation.

Snowfall

Months with snowfall in Marshalltown are January through May, October through December. The month with the most snowfall in Marshalltown is January, when snow falls for 9.8 days and typically aggregates up to 1.93" (49mm) of snow.

Daylight

In January, the average length of the day in Marshalltown, Iowa, is 9h and 32min.
On the first day of the month, sunrise is at 7:39 am and sunset at 4:50 pm. On the last day of January, in Marshalltown, sunrise is at 7:25 am and sunset at 5:24 pm CST.

Sunshine

With an average of 3.9h of sunshine, January has the least sunshine of the year in Marshalltown.

UV index

January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Marshalltown. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.
Note: A maximum UV index of 2 in January translates into the following recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
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Frequently asked questions

What month is the coldest in Marshalltown?

January, with its high-temperature average of 25.7°F (-3.5°C) and a low-temperature average of 12.7°F (-10.7°C), is the coldest month in Marshalltown.

How cold is January in Marshalltown?

In Marshalltown, in January, the average high-temperature is 25.7°F (-3.5°C), and the average low-temperature is 12.7°F (-10.7°C).

What is the most humid month in Marshalltown?

The most humid month in Marshalltown is January, with an average relative humidity of 86%.

What is the average humidity in January in Marshalltown?

In Marshalltown, the average relative humidity in January is 86%.

What is the driest month in Marshalltown?

The month with the least rainfall in Marshalltown is January, when the rain falls for 3.6 days and typically collects 0.43" (11mm) of precipitation.

How much does it rain in Marshalltown in January?

In January, in Marshalltown, Iowa, the rain falls for 3.6 days. Throughout January, 0.43" (11mm) of precipitation is accumulated.

When does it snow the most in Marshalltown?

January is the month with the most snowfall in Marshalltown, Iowa. Snow falls for 9.8 days and accumulates 1.93" (49mm) of snow.

How much does it snow in Marshalltown in January?

In Marshalltown, Iowa, in January, snow falls for 9.8 days, with typically accumulated 1.93" (49mm) of snow.

What is the average length of the day in January in Marshalltown?

In Marshalltown, the average day length in January is 9h and 32min.

When is the sunrise / sunset in January in Marshalltown?

On the first day of January in Marshalltown, sunrise is at 7:39 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:25 am and sunset at 5:24 pm CST.

What is the month with the least sunshine in Marshalltown?

With an average of 3.9h of sunshine, January has the least sunshine of the year in Marshalltown, Iowa.

How long on average sun shines in January in Marshalltown?

In Marshalltown, Iowa, the average sunshine duration in January is 3.9h.

When is the lowest UV index in Marshalltown?

The months with the lowest UV index in Marshalltown, Iowa, are January, February, October through December, with an average maximum UV index of 2.

What is the UV index reading in January in Marshalltown?

In January, the average daily maximum UV index in Marshalltown is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
32°F 0°C
25.7°F -3.5°C
29.8°F -1.2°C
Average low temperature
21°F -6.1°C
12.7°F -10.7°C
16.2°F -8.8°C
Average pressure
30.11" 765mmHg
30.15" 766mmHg
30.14" 766mmHg
Average wind speed
10.3mph 16.6km/h
10.7mph 17.2km/h
10.7mph 17.2km/h
Average max. wind speed
11mph 17.7km/h
11.4mph 18.3km/h
11.4mph 18.3km/h
Average wind speed gusts
16mph 25.7km/h
17mph 27.4km/h
16.7mph 26.9km/h
Average humidity
82%
86%
84%
Average rainfall
0.63" 16mm
0.43" 11mm
0.47" 12mm
Average rainfall days
4.8
3.6
2.8
Average snowfall
1.14" 29mm
1.93" 49mm
1.85" 47mm
Average snowfall days
7.5
9.8
7.8
Average daylight
9h 1min
9h 3min
10h 4min
Average sunshine
4h 2min
3h 5min
4h 2min
Average sunshine days
20.6
19.8
17.9
Average UV index
2
2
2
Average cloud cover
54%
57%
55%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Marshalltown, IA

Average temperature in January - Marshalltown, IA
  • Average high temperature in January: 25.7°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (25.7°F).

  • Average low temperature in January: 12.7°F

The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (12.7°F).

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Average pressure in January
Marshalltown, IA

Average pressure in January - Marshalltown, IA
  • Average pressure in January: 30.15"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in January
Marshalltown, IA

Average wind speed in January - Marshalltown, IA
  • Average wind speed in January: 10.7mph

The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

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Average humidity in January
Marshalltown, IA

Average humidity in January - Marshalltown, IA
  • Average humidity in January: 86%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in January
Marshalltown, IA

Average rainfall in January - Marshalltown, IA
  • Average rainfall in January: 0.43"

The wettest month (with the highest rainfall) is June (2.56").
The driest month (with the least rainfall) is January (0.43").

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Average rainfall days in January
Marshalltown, IA

Average rainfall days in January - Marshalltown, IA
  • Average rainfall days in January: 3.6 days

The month with the highest number of rainy days is June (15.7 days).
The month with the least rainy days is February (2.8 days).

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Average snowfall in January
Marshalltown, IA

Average snowfall in January - Marshalltown, IA
  • Average snowfall in January: 1.93"

The month with the highest snowfall is January (1.93").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Marshalltown, IA

Average snowfall days in January - Marshalltown, IA
  • Average snowfall days in January: 9.8 days

The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Marshalltown, IA

Average daylight in January / Average sunshine in January - Marshalltown, IA
  • Average daylight in January: 9h and 3min

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: 3h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in January
Marshalltown, IA

Average sunshine days in January - Marshalltown, IA
  • Average sunshine days in January: 19.8 days

The month with the most sunshine days is December (20.6 days).
The month with the least sunshine days is June (12.2 days).

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Average UV index in January
Marshalltown, IA

Average UV index in January - Marshalltown, IA
  • Average UV index in January: 2

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

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Average cloud cover in January
Marshalltown, IA

Average cloud cover in January - Marshalltown, IA
  • Average cloud cover in January: 57

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 30).

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Average visibility in January
Marshalltown, IA

Average visibility in January - Marshalltown, IA
  • Average visibility in January: 6mi

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

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Marshalltown, Iowa, USA

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