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
Decorah notes the coldest temperatures in January, with a high average of 22.3°F (-5.4°C) and a low of 9.7°F (-12.4°C).Humidity
January and February, with an average relative humidity of 89%, are the most humid months.Rainfall
January is the month with the least rainfall in Decorah, Iowa. Rain falls for 4.5 days and accumulates 1.1" (28mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Decorah, Iowa. In January, it is snowing for 14.3 days. Throughout January, 5.63" (143mm) of snow is accumulated. Throughout the year, in Decorah, there are 60.9 snowfall days, and 24.37" (619mm) of snow is accumulated.Daylight
In Decorah, the average length of the day in January is 9h and 25min.On the first day of January in Decorah, sunrise is at 7:39 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 5:17 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 3.5h of sunshine.UV index
The months with the lowest UV index in Decorah are January, February, November and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 1 during January translates into the following recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Around midday, solar radiation is most harmful; hence, exposure should be limited. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of 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 Decorah?
How cold is January in Decorah?
What are the most humid months in Decorah?
What is the average humidity in January in Decorah?
What is the driest month in Decorah?
How many days does it rain in January in Decorah?
How much does it snow in Decorah in January?
How many hours of daylight does Decorah have in January?
When is the sunrise / sunset in January in Decorah?
What is the month with the least sunshine in Decorah?
How many hours of sunshine does Decorah have in January?
When is the lowest UV index in Decorah?
How high is the UV index in January in Decorah?
Average temperature in January
Decorah, IA
- Average high temperature in January: 22.3°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (22.3°F).
- Average low temperature in January: 9.7°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (9.7°F).
Average pressure in January
Decorah, IA
- Average pressure in January: 30.13"Hg
The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in January
Decorah, IA
- Average wind speed in January: 10.2mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in January
Decorah, IA
- Average humidity in January: 89%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is October (76%).
Average rainfall in January
Decorah, IA
- Average rainfall in January: 1.1"
The wettest month (with the highest rainfall) is June (5.04").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days in January
Decorah, IA
- Average rainfall days in January: 4.5 days
The months with the highest number of rainy days are May and June (20.3 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in January
Decorah, IA
- Average snowfall in January: 5.63"
The month with the highest snowfall is February (5.98").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Decorah, IA
- Average snowfall days in January: 14.3 days
The month with the highest number of snowfall days is January (14.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Decorah, IA
- Average daylight in January: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January: 3h and 3min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in January
Decorah, IA
- Average sunshine days in January: 14 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (7.1 days).
Average UV index in January
Decorah, IA
- Average UV index in January: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in January
Decorah, IA
- Average cloud cover in January: 64
The month with the most cloud cover is January (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in January
Decorah, IA
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, August, September, October and November (6mi).
The months with the lowest visibility are January, February, July and December (5mi).
Decorah, Iowa, USA
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