December weather forecastGrinnell, KS
December
Weather in December
December, the first month of the winter in Grinnell, is still a cold month, with an average temperature fluctuating between 41.9°F (5.5°C) and 25.5°F (-3.6°C).Temperature
December is the month when Grinnell experiences its coldest temperatures, averaging a high of 41.9°F (5.5°C) and a low of 25.5°F (-3.6°C).Humidity
January and December, with an average relative humidity of 63%, are the most humid months in Grinnell.Rainfall
In December, in Grinnell, the rain falls for 4.6 days. Throughout December, 0.67" (17mm) of precipitation is accumulated. Throughout the year, there are 105.4 rainfall days, and 13.7" (348mm) of precipitation is accumulated.Snowfall
January through April, October through December are months with snowfall. December is the month with the most snowfall in Grinnell, Kansas. Snow falls for 2.5 days and accumulates 1.06" (27mm) of snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:43 am and sunset at 5:20 pm. On the last day of the month, sunrise is at 8:01 am and sunset at 5:30 pm CST.
Sunshine
December has the least sunshine of the year in Grinnell, Kansas, with an average of 6.5h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Grinnell. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: During December, 2 as the daily maximum UV index converts into the following advice:
Extended sunlight exposure does not pose significant problems for most people, except for children, infants, and people with fair skin who always need shielding. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Take careful note! The UV radiation of the Sun can be nearly doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Grinnell, KS
- Average high temperature in December: 41.9°F
The warmest month (with the highest average high temperature) is July (92.5°F).
The month with the lowest average high temperature is December (41.9°F).
- Average low temperature in December: 25.5°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in December
Grinnell, KS
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.81"Hg).
Average wind speed in December
Grinnell, KS
- Average wind speed in December: 10.9mph
The windiest month (with the highest average wind speed) is April (12.9mph).
The calmest month (with the lowest average wind speed) is August (10.1mph).
Average humidity in December
Grinnell, KS
- Average humidity in December: 63%
The months with the highest relative humidity are January and December (63%).
The month with the lowest relative humidity is July (50%).
Average rainfall in December
Grinnell, KS
- Average rainfall in December: 0.67"
The wettest month (with the highest rainfall) is May (2.36").
The driest months (with the least rainfall) are January and November (0.39").
Average rainfall days in December
Grinnell, KS
- Average rainfall days in December: 4.6 days
The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is November (4 days).
Average snowfall in December
Grinnell, KS
- Average snowfall in December: 1.06"
The month with the highest snowfall is December (1.06").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Grinnell, KS
- Average snowfall days in December: 2.5 days
The month with the highest number of snowfall days is February (3.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Grinnell, KS
- Average daylight in December: 9h and 30min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in December: 6h and 30min
The months with the most sunshine are June and July (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in December
Grinnell, KS
- Average sunshine days in December: 23.7 days
The month with the most sunshine days is December (23.7 days).
The months with the least sunshine days are June and July (14.7 days).
Average UV index in December
Grinnell, KS
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Grinnell, KS
- Average cloud cover in December: 27
The months with the most cloud cover are February and April (Cloud cover 31).
The month with the least cloud cover is June (Cloud cover 17).
Average visibility in December
Grinnell, KS
- Average visibility in December: 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).
