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
With average high temperatures of 27.1°F (-2.7°C) and lows of 15.3°F (-9.3°C), January is the coldest month.Humidity
The months with the highest humidity are January and July, with an average relative humidity of 84%.Rainfall
January is the month with the least rainfall. Rain falls for 4.8 days and accumulates 1.18" (30mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. January is the month with the most snowfall in Williamsburg, Iowa. Snow falls for 9.6 days and accumulates 4.8" (122mm) of snow.Daylight
In January, the average length of the day is 9h and 34min.On the first day of January in Williamsburg, sunrise is at 7:34 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 5:21 pm CST.
Sunshine
The month with the least sunshine in Williamsburg is January, with an average of 4.1h of sunshine.UV index
The months with the lowest UV index are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high daily UV index of 1 during January translates 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. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month in Williamsburg?
How cold is January in Williamsburg?
What are the most humid months in Williamsburg?
What is the average humidity in January in Williamsburg?
What is the driest month in Williamsburg?
How many days does it rain in January in Williamsburg?
When does it snow the most in Williamsburg?
How much does it snow in Williamsburg in January?
How many hours of daylight does Williamsburg have in January?
What time are sunrise and sunset in January in Williamsburg?
What is the month with the least sunshine in Williamsburg?
How long on average sun shines in January in Williamsburg?
What is the month with the lowest UV index in Williamsburg?
How high is the UV index in January in Williamsburg?
Average temperature in January
Williamsburg, IA
- Average high temperature in January: 27.1°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (27.1°F).
- Average low temperature in January: 15.3°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (15.3°F).
Average pressure in January
Williamsburg, IA
- Average pressure in January: 30.14"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in January
Williamsburg, IA
- Average wind speed in January: 10.7mph
The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in January
Williamsburg, IA
- Average humidity in January: 84%
The months with the highest relative humidity are January and July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in January
Williamsburg, IA
- Average rainfall in January: 1.18"
The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in January
Williamsburg, IA
- Average rainfall days in January: 4.8 days
The months with the highest number of rainy days are May and June (18.5 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in January
Williamsburg, IA
- Average snowfall in January: 4.8"
The month with the highest snowfall is January (4.8").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Williamsburg, IA
- Average snowfall days in January: 9.6 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Williamsburg, IA
- Average daylight in January: 9h and 4min
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 0min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in January
Williamsburg, IA
- Average sunshine days in January: 18.3 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (9.1 days).
Average UV index in January
Williamsburg, IA
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in January
Williamsburg, IA
- Average cloud cover in January: 56
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in January
Williamsburg, IA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Williamsburg, Iowa, USA
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