January weather forecastMarshalltown, IA
January
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.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
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").
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).
Average daylight in January /
Average sunshine in January
Marshalltown, IA
- Average daylight in January: 9h and 30min
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 54min
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).
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).
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).
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).
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).
