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
Williams experiences its lowest average temperatures in December, reaching a peak of 54°F (12.2°C) and a minimum of 41.4°F (5.2°C).Humidity
In December, the average relative humidity is 68%.Rainfall
In December, the rain falls for 10.8 days. Throughout December, 2.52" (64mm) of precipitation is accumulated. In Williams, during the entire year, the rain falls for 76.6 days and collects up to 13.11" (333mm) of precipitation.Snowfall
The only month with snowfall is December. The month with the most snowfall is December, when snow falls for 0.1 days and typically aggregates up to 0.04" (1mm) of snow.Daylight
The month with the shortest days in Williams is December, with an average of 9h and 30min of daylight.On the first day of the month, sunrise is at 7:09 am and sunset at 4:46 pm. On the last day of December, sunrise is at 7:27 am and sunset at 4:56 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 5.8h of sunshine.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for average individuals.Note: During December, 3 as the daily maximum UV index converts into the following advice:
Guard yourself - Precautionary measures against sun damage are advocated. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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
What are the coldest months?
What is the temperature in December?
What is the average humidity in December?
How much does it rain in December?
When does it snow the most?
When does it start to snow?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How long on average sun shines in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Williams, CA
- Average high temperature in December: 54°F
The warmest month (with the highest average high temperature) is July (97°F).
The month with the lowest average high temperature is December (54°F).
- Average low temperature in December: 41.4°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).
Average pressure in December
Williams, CA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Williams, CA
- Average wind speed in December: 5.5mph
The windiest month (with the highest average wind speed) is March (6.2mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in December
Williams, CA
- Average humidity in December: 68%
The month with the highest relative humidity is March (71%).
The month with the lowest relative humidity is September (37%).
Average rainfall in December
Williams, CA
- Average rainfall in December: 2.52"
The wettest month (with the highest rainfall) is February (2.64").
The driest month (with the least rainfall) is July (0.04").
Average rainfall days in December
Williams, CA
- Average rainfall days in December: 10.8 days
The month with the highest number of rainy days is March (13.5 days).
The month with the least rainy days is July (0.9 days).
Average snowfall in December
Williams, CA
- Average snowfall in December: 0.04"
The month with the highest snowfall is December (0.04").
The months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Williams, CA
- Average snowfall days in December: 0.1 days
The months with the highest number of snowfall days are February, March and December (0.1 days).
The months with the least snowfall days are January, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Williams, CA
- Average daylight in December: 9h and 3min
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: 5h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in December
Williams, CA
- Average sunshine days in December: 19.1 days
The month with the most sunshine days is July (29.4 days).
The month with the least sunshine days is March (16.5 days).
Average UV index in December
Williams, CA
- Average UV index in December: 3
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 3).
Average cloud cover in December
Williams, CA
- Average cloud cover in December: 35
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Williams, CA
- 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).
Williams, California, USA
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