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
The lowest temperatures are recorded in January, with averages reaching a high of 22.5°F (-5.3°C) and a low of 9.9°F (-12.3°C).Humidity
The most humid month is January, with an average relative humidity of 89%.Rainfall
January is the month with the least rainfall. Rain falls for 4 days and accumulates 0.98" (25mm) of precipitation.Snowfall
Months with snowfall in Postville are January through May, October through December. In Postville, in January, snow falls for 13.3 days, with typically accumulated 5" (127mm) of snow. Throughout the year, in Postville, there are 52.3 snowfall days, and 21.26" (540mm) of snow is accumulated.Daylight
In Postville, the average length of the day in January is 9h and 26min.On the first day of January in Postville, sunrise is at 7:37 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 5:16 pm CST.
Sunshine
January has the least sunshine of the year in Postville, with an average of 3.5h of sunshine.UV index
The months with the lowest UV index in Postville are January, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 1 in January interprets into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Postville?
How cold is January in Postville?
What is the most humid month in Postville?
What is the average humidity in January in Postville?
What is the driest month in Postville?
How many days does it rain in January in Postville?
How much does it snow in Postville in January?
How many hours of daylight does Postville have in January?
When are sunrise and sunset in January in Postville?
What is the month with the least sunshine in Postville?
How many hours of sunshine does Postville have in January?
What are the months with the lowest UV index in Postville?
How high is the UV index in January in Postville?
Average temperature in January
Postville, IA
- Average high temperature in January: 22.5°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in January: 9.9°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).
Average pressure in January
Postville, IA
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in January
Postville, IA
- Average wind speed in January: 10.2mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in January
Postville, IA
- Average humidity in January: 89%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (75%).
Average rainfall in January
Postville, IA
- Average rainfall in January: 0.98"
The wettest month (with the highest rainfall) is June (4.33").
The driest month (with the least rainfall) is January (0.98").
Average rainfall days in January
Postville, IA
- Average rainfall days in January: 4 days
The month with the highest number of rainy days is June (17.7 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in January
Postville, IA
- Average snowfall in January: 5"
The month with the highest snowfall is February (5.16").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Postville, IA
- Average snowfall days in January: 13.3 days
The month with the highest number of snowfall days is January (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Postville, 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 6min).
- 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
Postville, IA
- Average sunshine days in January: 15.3 days
The month with the most sunshine days is September (17 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in January
Postville, IA
- Average UV index in January: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in January
Postville, 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
Postville, IA
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
Postville, Iowa, USA
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