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
Grinnell's coldest weather arrives in January, when temperatures average a high of 27°F (-2.8°C) and a low of 13.8°F (-10.1°C).Humidity
January is the most humid month in Grinnell, with an average relative humidity of 84%.Rainfall
January is the month with the least rainfall in Grinnell. Rain falls for 4.3 days and accumulates 0.47" (12mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Grinnell, Iowa. January is the month with the most snowfall. Snow falls for 8.1 days and accumulates 1.81" (46mm) of snow.Daylight
The average length of the day in January in Grinnell is 9h and 34min.On the first day of the month, sunrise is at 7:38 am and sunset at 4:50 pm. On the last day of January, sunrise is at 7:24 am and sunset at 5:24 pm CST.
Sunshine
With an average of 4.1h of sunshine, January has the least sunshine of the year in Grinnell.UV index
January is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.Note: In January, a daily maximum UV index of 1 leads to the following instructions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Tightly woven clothing, when worn loosely, shields effectively against the Sun. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months in Grinnell?
How cold is it in Grinnell in January?
What is the most humid month in Grinnell?
What is the average humidity in January in Grinnell?
What is the driest month in Grinnell?
How many days does it rain in January in Grinnell?
When does it snow the most in Grinnell?
How many days does it snow in January in Grinnell?
What is the average length of the day in January in Grinnell?
When is the sunrise / sunset in January in Grinnell?
What is the month with the least sunshine in Grinnell?
How long on average sun shines in January in Grinnell?
What is the month with the lowest UV index in Grinnell?
What is the UV index intensity in January in Grinnell?
Average temperature in January
Grinnell, IA
- Average high temperature in January: 27°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°F).
- Average low temperature in January: 13.8°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 (13.8°F).
Average pressure in January
Grinnell, IA
- Average pressure in January: 30.15"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in January
Grinnell, IA
- Average wind speed in January: 10.6mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in January
Grinnell, IA
- Average humidity in January: 84%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (71%).
Average rainfall in January
Grinnell, IA
- Average rainfall in January: 0.47"
The wettest months (with the highest rainfall) are May and June (1.97").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in January
Grinnell, IA
- Average rainfall days in January: 4.3 days
The month with the highest number of rainy days is June (15.1 days).
The month with the least rainy days is February (4.1 days).
Average snowfall in January
Grinnell, IA
- Average snowfall in January: 1.81"
The month with the highest snowfall is January (1.81").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Grinnell, IA
- Average snowfall days in January: 8.1 days
The month with the highest number of snowfall days is January (8.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Grinnell, 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 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in January
Grinnell, IA
- Average sunshine days in January: 21.1 days
The month with the most sunshine days is January (21.1 days).
The month with the least sunshine days is June (11.5 days).
Average UV index in January
Grinnell, IA
- Average UV index in January: 1
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in January
Grinnell, 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 September (Cloud cover 29).
Average visibility in January
Grinnell, IA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
Grinnell, Iowa, USA
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