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
Walnut Creek's December weather comes with a decrease in average high-temperatures, moving from a frosty 48.6°F (9.2°C) in November to a cold 38.3°F (3.5°C). December brings Walnut Creek a consistent average low-temperature of 27.5°F (-2.5°C).Humidity
In Walnut Creek, the average relative humidity in December is 83%.Rainfall
In Walnut Creek, in December, during 8.3 rainfall days, 1.26" (32mm) of precipitation is typically accumulated. Throughout the year, there are 134.9 rainfall days, and 18.07" (459mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall. In Walnut Creek, during December, snow falls for 6.5 days and regularly aggregates up to 1.65" (42mm) of snow. In Walnut Creek, Ohio, during the entire year, snow falls for 37.7 days and aggregates up to 9.33" (237mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:31 am and sunset at 5:00 pm. On the last day of December, in Walnut Creek, sunrise is at 7:50 am and sunset at 5:10 pm EST.
Sunshine
In Walnut Creek, the average sunshine in December is 3.5h.UV index
December is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 1 in December translates into the following instructions:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold does it get in December?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Walnut Creek have in December?
When are sunrise and sunset in December?
How long on average sun shines in December?
When is the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Walnut Creek, OH
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 27.5°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in December
Walnut Creek, OH
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in December
Walnut Creek, OH
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is January (8.4mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in December
Walnut Creek, OH
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (85%).
The month with the lowest relative humidity is April (77%).
Average rainfall in December
Walnut Creek, OH
- Average rainfall in December: 1.26"
The wettest month (with the highest rainfall) is July (2.13").
The driest month (with the least rainfall) is January (1.06").
Average rainfall days in December
Walnut Creek, OH
- Average rainfall days in December: 8.3 days
The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is February (6.4 days).
Average snowfall in December
Walnut Creek, OH
- Average snowfall in December: 1.65"
The month with the highest snowfall is February (2.76").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Walnut Creek, OH
- Average snowfall days in December: 6.5 days
The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Walnut Creek, OH
- 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: 3h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in December
Walnut Creek, OH
- Average sunshine days in December: 18 days
The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in December
Walnut Creek, OH
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in December
Walnut Creek, OH
- Average cloud cover in December: 64
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in December
Walnut Creek, OH
- Average visibility in December: 5mi
The months with the highest visibility are April, October and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and December (5mi).
Walnut Creek, Ohio, USA
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