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
In Union, the month of January registers the lowest temperatures, averaging 24.4°F (-4.2°C) at the peak and 12.2°F (-11°C) at the lowest.Humidity
January is the most humid month, with an average relative humidity of 87%.Rainfall
January and February are months with the least rain when the rain falls for 2 days and typically aggregates up to 0.24" (6mm) of rain.Snowfall
January through April, October through December are months with snowfall. In Union, in January, snow falls for 7 days, with typically accumulated 0.75" (19mm) of snow. In Union, during the entire year, snow falls for 26.6 days and aggregates up to 3.03" (77mm) of snow.Daylight
In Union, the average length of the day in January is 9h and 31min.On the first day of the month, sunrise is at 7:40 am and sunset at 4:50 pm. On the last day of January, sunrise is at 7:26 am and sunset at 5:24 pm CST.
Sunshine
The month with the least sunshine is January, with an average of 3.9h of sunshine.UV index
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Union. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: A daily high UV index of 2 in January leads to these guidelines:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the coldest?
How cold is it in January?
What is the most humid month?
What is the average humidity in January?
What is the driest month?
How many days does it rain in January?
How many days does it snow in January in Union?
What is the average length of the day in January in Union?
When are sunrise and sunset in January?
What is the month with the least sunshine?
How many hours of sunshine does Union have in January?
When is the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Union, IA
- Average high temperature in January: 24.4°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (24.4°F).
- Average low temperature in January: 12.2°F
The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).
Average pressure in January
Union, 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
Union, IA
- Average wind speed in January: 10.8mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in January
Union, IA
- Average humidity in January: 87%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Union, IA
- Average rainfall in January: 0.24"
The wettest month (with the highest rainfall) is May (1.06").
The driest months (with the least rainfall) are January and February (0.24").
Average rainfall days in January
Union, IA
- Average rainfall days in January: 2 days
The month with the highest number of rainy days is May (11.6 days).
The months with the least rainy days are January and February (2 days).
Average snowfall in January
Union, IA
- Average snowfall in January: 0.75"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Union, IA
- Average snowfall days in January: 7 days
The month with the highest number of snowfall days is January (7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Union, 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).
Average sunshine days in January
Union, IA
- Average sunshine days in January: 25.2 days
The month with the most sunshine days is January (25.2 days).
The month with the least sunshine days is June (15.8 days).
Average UV index in January
Union, 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
Union, IA
- Average cloud cover in January: 58
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 31).
Average visibility in January
Union, 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).
Union, Iowa, USA
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