Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
In Gridley, the beginning of December is marked by a lowered average high-temperature, shifting from November's frosty 47.7°F (8.7°C) to a cold 36.5°F (2.5°C). In Gridley, December nights cool down to an average of 25.9°F (-3.4°C).Humidity
In Gridley, the average relative humidity in December is 81%.Rainfall
In Gridley, in December, during 5.9 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. In Gridley, during the entire year, the rain falls for 131.6 days and collects up to 18.86" (479mm) of precipitation.Snowfall
January through April, November and December are months with snowfall in Gridley, Illinois. In December, in Gridley, Illinois, it is snowing for 5.9 days. Throughout December, 1.26" (32mm) of snow is accumulated. Throughout the year, there are 30.1 snowfall days, and 9.17" (233mm) of snow is accumulated.Daylight
The month with the shortest days in Gridley is December, with an average of 9h and 18min of daylight.On the first day of December, sunrise is at 7:00 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 4:38 pm CST.
Sunshine
In December, the average sunshine is 4.3h.UV index
The month with the lowest UV index in Gridley is December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 1 during December leads to these advisories:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
How cold is December in Gridley?
What is the average humidity in December in Gridley?
How many days does it rain in December in Gridley?
How many days does it snow in December in Gridley?
What is the month with the shortest days in Gridley?
How many hours of daylight does Gridley have in December?
When are sunrise and sunset in December in Gridley?
How long on average sun shines in December in Gridley?
What is the month with the lowest UV index in Gridley?
What is the UV index intensity in December in Gridley?
Average temperature in December
Gridley, IL
- Average high temperature in December: 36.5°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.4°F).
- Average low temperature in December: 25.9°F
The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in December
Gridley, IL
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Gridley, IL
- Average wind speed in December: 10.3mph
The windiest month (with the highest average wind speed) is January (10.8mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in December
Gridley, IL
- Average humidity in December: 81%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (71%).
Average rainfall in December
Gridley, IL
- Average rainfall in December: 0.98"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in December
Gridley, IL
- Average rainfall days in December: 5.9 days
The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is February (5.1 days).
Average snowfall in December
Gridley, IL
- Average snowfall in December: 1.26"
The month with the highest snowfall is January (2.4").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Gridley, IL
- Average snowfall days in December: 5.9 days
The month with the highest number of snowfall days is January (10.6 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
Gridley, IL
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 4h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in December
Gridley, IL
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is November (20 days).
The month with the least sunshine days is July (10.3 days).
Average UV index in December
Gridley, IL
- Average UV index in December: 1
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Gridley, IL
- Average cloud cover in December: 55
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 32).
Average visibility in December
Gridley, IL
- Average visibility in December: 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).
Gridley, Illinois, USA
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