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
In Grafton, the lowest average temperatures are observed in January, with a high of 21.6°F (-5.8°C) and a low of 9°F (-12.8°C).Humidity
With an average relative humidity of 90%, January is the most humid month.Rainfall
January is the month with the least rainfall. Rain falls for 4.5 days and accumulates 0.94" (24mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Grafton. In Grafton, in January, snow falls for 13.8 days, with typically accumulated 4.84" (123mm) of snow. Throughout the year, there are 57 snowfall days, and 22.83" (580mm) of snow is accumulated.Daylight
In Grafton, the average length of the day in January is 9h and 25min.On the first day of January, sunrise is at 7:44 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:22 pm CST.
Sunshine
With an average of 3.4h of sunshine, January has the least sunshine of the year.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Grafton. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 1 during January translates into these guidelines:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Frequently asked questions
What month is the coldest in Grafton?
How cold is January in Grafton?
What is the most humid month in Grafton?
What is the average humidity in January in Grafton?
What is the driest month in Grafton?
How much does it rain in Grafton in January?
How much does it snow in Grafton in January?
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 long on average sun shines in January in Grafton?
What are the months with the lowest UV index in Grafton?
What is the UV index intensity in January in Grafton?
Average temperature in January
Grafton, IA
- Average high temperature in January: 21.6°F
The warmest month (with the highest average high temperature) is July (79.2°F).
The month with the lowest average high temperature is January (21.6°F).
- Average low temperature in January: 9°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9°F).
Average pressure in January
Grafton, IA
- Average pressure in January: 30.14"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in January
Grafton, IA
- Average wind speed in January: 10.7mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.4mph).
Average humidity in January
Grafton, IA
- Average humidity in January: 90%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and October (72%).
Average rainfall in January
Grafton, IA
- Average rainfall in January: 0.94"
The wettest month (with the highest rainfall) is June (4.13").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in January
Grafton, IA
- Average rainfall days in January: 4.5 days
The month with the highest number of rainy days is June (18.4 days).
The month with the least rainy days is February (2.9 days).
Average snowfall in January
Grafton, IA
- Average snowfall in January: 4.84"
The month with the highest snowfall is February (5.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Grafton, IA
- Average snowfall days in January: 13.8 days
The month with the highest number of snowfall days is January (13.8 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, 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 0min).
- Average sunshine in January: 3h and 2min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in January
Grafton, IA
- Average sunshine days in January: 14.1 days
The month with the most sunshine days is October (18.1 days).
The month with the least sunshine days is June (9.1 days).
Average UV index in January
Grafton, 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, February, November and December (UV index 1).
Average cloud cover in January
Grafton, IA
- Average cloud cover in January: 65
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in January
Grafton, IA
- Average visibility in January: 5mi
The months with the highest visibility are March, April, May, June, September, October and November (6mi).
The months with the lowest visibility are January, February, July, August and December (5mi).
Grafton, Iowa, USA
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