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
O'Leary's January weather reaches an average high of 24.8°F (-4°C) and an average low of 11.5°F (-11.4°C), making it the coldest month.Humidity
January is the most humid month, with an average relative humidity of 86%.Rainfall
January is the month with the least rainfall. Rain falls for 3 days and accumulates 0.63" (16mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In O'Leary, in January, during 9.2 snowfall days, 2.91" (74mm) of snow is typically accumulated. In O'Leary, during the entire year, snow falls for 39.2 days and aggregates up to 14.84" (377mm) of snow.Daylight
In January, the average length of the day is 9h and 28min.On the first day of the month, sunrise is at 7:54 am and sunset at 5:00 pm. On the last day of January, sunrise is at 7:39 am and sunset at 5:35 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 4.1h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in O'Leary. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum daily UV index of 2 during January morphs into the following directions:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in O'Leary?
How cold is it in O'Leary in January?
What is the most humid month in O'Leary?
What is the average humidity in January in O'Leary?
What is the driest month in O'Leary?
How many days does it rain in January in O'Leary?
How many days does it snow in January in O'Leary?
What is the average length of the day in January in O'Leary?
When are sunrise and sunset in January in O'Leary?
What is the month with the least sunshine in O'Leary?
How many hours of sunshine does O'Leary have in January?
What are the months with the lowest UV index in O'Leary?
How high is the UV index in January in O'Leary?
Average temperature in January
O'Leary, IA
- Average high temperature in January: 24.8°F
The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (24.8°F).
- Average low temperature in January: 11.5°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (11.5°F).
Average pressure in January
O'Leary, 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 (29.86"Hg).
Average wind speed in January
O'Leary, IA
- Average wind speed in January: 10.6mph
The windiest month (with the highest average wind speed) is April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.7mph).
Average humidity in January
O'Leary, 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 (66%).
Average rainfall in January
O'Leary, IA
- Average rainfall in January: 0.63"
The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is January (0.63").
Average rainfall days in January
O'Leary, IA
- Average rainfall days in January: 3 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (2.4 days).
Average snowfall in January
O'Leary, IA
- Average snowfall in January: 2.91"
The month with the highest snowfall is February (4.09").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
O'Leary, IA
- Average snowfall days in January: 9.2 days
The month with the highest number of snowfall days is January (9.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
O'Leary, IA
- Average daylight in January: 9h and 3min
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: 4h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in January
O'Leary, IA
- Average sunshine days in January: 19.7 days
The month with the most sunshine days is November (22.1 days).
The month with the least sunshine days is June (11.7 days).
Average UV index in January
O'Leary, 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, November and December (UV index 2).
Average cloud cover in January
O'Leary, IA
- Average cloud cover in January: 55
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in January
O'Leary, 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).
O'Leary, Iowa, USA
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