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, with its average high-temperature of 26.2°F (-3.2°C) and an average low-temperature of 13.6°F (-10.2°C), holds the record as the coldest month.Humidity
January is the most humid month, with an average relative humidity of 84%.Rainfall
The month with the least rainfall is January, when the rain falls for 4.6 days and typically collects 0.94" (24mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. In Ralston, during January, snow falls for 11.8 days and regularly aggregates up to 4.02" (102mm) of snow. In Ralston, during the entire year, snow falls for 44.8 days and aggregates up to 19.8" (503mm) of snow.Daylight
In January, the average length of the day is 9h and 32min.On the first day of January, sunrise is at 7:46 am and sunset at 4:57 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 5:31 pm CST.
Sunshine
With an average of 4.2h of sunshine, January has the least sunshine of the year.UV index
The average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.Note: A daily maximum UV index of 2 in January translates into the following instructions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year?
How cold is it in January?
What is the most humid month?
What is the average humidity in January in Ralston?
What is the driest month?
How many days does it rain in January?
How much does it snow in January?
What is the average length of the day in January?
When are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
How high is the UV index in January?
Average temperature in January
Ralston, IA
- Average high temperature in January: 26.2°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in January: 13.6°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure in January
Ralston, 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 (29.88"Hg).
Average wind speed in January
Ralston, IA
- Average wind speed in January: 11.1mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in January
Ralston, IA
- Average humidity in January: 84%
The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are April and October (69%).
Average rainfall in January
Ralston, IA
- Average rainfall in January: 0.94"
The wettest month (with the highest rainfall) is May (4.29").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in January
Ralston, IA
- Average rainfall days in January: 4.6 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in January
Ralston, IA
- Average snowfall in January: 4.02"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Ralston, IA
- Average snowfall days in January: 11.8 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Ralston, 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: 4h and 1min
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 12min).
Average sunshine days in January
Ralston, IA
- Average sunshine days in January: 16.1 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is June (10 days).
Average UV index in January
Ralston, IA
- Average UV index in January: 2
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in January
Ralston, 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 28).
Average visibility in January
Ralston, IA
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, May, June, July, September, October, November and December (6mi).
The months with the lowest visibility are January and August (5mi).
Ralston, Iowa, USA
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