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, marked by an average high-temperature of 25.5°F (-3.6°C) and a low-temperature of 15.8°F (-9°C), is the coldest month.Humidity
January is the most humid month, with an average relative humidity of 86%.Rainfall
In Grafton, in January, it is raining for 4.4 days, with typically 1.18" (30mm) of accumulated precipitation. Throughout the year, in Grafton, Wisconsin, there are 134.9 rainfall days, and 23.94" (608mm) of precipitation is accumulated.Snowfall
Months with snowfall in Grafton, Wisconsin, are January through April, October through December. The month with the most snowfall in Grafton is January, when snow falls for 12.8 days and typically aggregates up to 3.43" (87mm) of snow.Daylight
The average length of the day in January is 9h and 25min.On the first day of January, sunrise is at 7:24 am and sunset at 4:26 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 5:01 pm CST.
Sunshine
January has the least sunshine of the year, with an average of 3.6h of sunshine.UV index
January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Grafton. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In January, a daily maximum UV index of 1 leads to the following instructions:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
What time of the year is the coldest in Grafton?
How cold is it in Grafton in January?
What is the most humid month in Grafton?
What is the average humidity in January in Grafton?
How much does it rain in Grafton in January?
When does it snow the most in Grafton?
How many days does it snow in January in Grafton?
How many hours of daylight does Grafton have in January?
When are sunrise and sunset in January in Grafton?
What is the month with the least sunshine in Grafton?
How many hours of sunshine does Grafton have in January?
What are the months with the lowest UV index in Grafton?
What is the UV index reading in January in Grafton?
Average temperature in January
Grafton, WI
- Average high temperature in January: 25.5°F
The warmest month (with the highest average high temperature) is July (76.1°F).
The month with the lowest average high temperature is January (25.5°F).
- Average low temperature in January: 15.8°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (15.8°F).
Average pressure in January
Grafton, WI
- Average pressure in January: 30.09"Hg
The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in January
Grafton, WI
- Average wind speed in January: 12.1mph
The windiest month (with the highest average wind speed) is January (12.1mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).
Average humidity in January
Grafton, WI
- Average humidity in January: 86%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are April, October and November (77%).
Average rainfall in January
Grafton, WI
- Average rainfall in January: 1.18"
The wettest month (with the highest rainfall) is July (2.99").
The driest month (with the least rainfall) is February (0.98").
Average rainfall days in January
Grafton, WI
- Average rainfall days in January: 4.4 days
The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is February (3.8 days).
Average snowfall in January
Grafton, WI
- Average snowfall in January: 3.43"
The month with the highest snowfall is January (3.43").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Grafton, WI
- Average snowfall days in January: 12.8 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Grafton, WI
- 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 0min).
- Average sunshine in January: 3h and 4min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).
Average sunshine days in January
Grafton, WI
- Average sunshine days in January: 13.3 days
The month with the most sunshine days is December (16.4 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in January
Grafton, WI
- 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
Grafton, WI
- Average cloud cover in January: 63
The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 28).
Average visibility in January
Grafton, WI
- 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).
Grafton, Wisconsin, USA
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