Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
January is the coldest month of the year, registering average temperatures as high as 27.3°F (-2.6°C) and as low as 14.5°F (-9.7°C).Humidity
With an average relative humidity of 83%, January is the most humid month.Rainfall
The month with the least rainfall in Harlan is January, when the rain falls for 3.2 days and typically collects 0.43" (11mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Harlan, Iowa, in January, snow falls for 8.3 days, with typically accumulated 1.57" (40mm) of snow. Throughout the year, in Harlan, there are 31.5 snowfall days, and 7.13" (181mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 34min.On the first day of January in Harlan, sunrise is at 7:48 am and sunset at 5:01 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 5:35 pm CST.
Sunshine
With an average of 4.5h of sunshine, January has the least sunshine of the year.UV index
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 2 during January translates into these guidelines:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Harlan?
How cold is it in Harlan in January?
What is the most humid month in Harlan?
What is the average humidity in January in Harlan?
What is the driest month in Harlan?
How much does it rain in Harlan in January?
How many days does it snow in January in Harlan?
What is the average length of the day in January in Harlan?
When are sunrise and sunset in January in Harlan?
What is the month with the least sunshine in Harlan?
How many hours of sunshine does Harlan have in January?
When is the lowest UV index in Harlan?
How high is the UV index in January in Harlan?
Average temperature in January
Harlan, IA
- Average high temperature in January: 27.3°F
The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (27.3°F).
- Average low temperature in January: 14.5°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (14.5°F).
Average pressure in January
Harlan, IA
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in January
Harlan, IA
- Average wind speed in January: 10.6mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in January
Harlan, IA
- Average humidity in January: 83%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (68%).
Average rainfall in January
Harlan, IA
- Average rainfall in January: 0.43"
The wettest month (with the highest rainfall) is June (2.64").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in January
Harlan, IA
- Average rainfall days in January: 3.2 days
The month with the highest number of rainy days is June (16.1 days).
The month with the least rainy days is February (2.8 days).
Average snowfall in January
Harlan, IA
- Average snowfall in January: 1.57"
The month with the highest snowfall is February (2.09").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Harlan, IA
- Average snowfall days in January: 8.3 days
The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Harlan, 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 3min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in January
Harlan, IA
- Average sunshine days in January: 20.1 days
The month with the most sunshine days is December (21.6 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in January
Harlan, IA
- Average UV index in January: 2
The months with the highest UV index are June, July and August (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
Harlan, IA
- Average cloud cover in January: 52
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in January
Harlan, IA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Harlan, Iowa, USA
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