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
December brings the lowest temperatures in Williams, with an average high of 44.4°F (6.9°C) and an average low of 27°F (-2.8°C).Humidity
The average relative humidity in December is 61%.Rainfall
In December, the rain falls for 4.3 days. Throughout December, 0.94" (24mm) of precipitation is accumulated. Throughout the year, in Williams, there are 70.4 rainfall days, and 10" (254mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. December is the month with the most snowfall in Williams. Snow falls for 6.2 days and accumulates 5.94" (151mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 48min of daylight.On the first day of December, sunrise is at 7:19 am and sunset at 5:16 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 5:27 pm MST.
Sunshine
The month with the least sunshine is December, with an average of 6.8h 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 Williams. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The average daily UV index of 2 in December transforms into the following instructions:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What month is the coldest in Williams?
How cold does it get in Williams in December?
What is the average humidity in December in Williams?
How much does it rain in Williams in December?
What is the snowiest month in Williams?
How many days does it snow in December in Williams?
What is the month with the shortest days in Williams?
How many hours of daylight does Williams have in December?
What time are sunrise and sunset in December in Williams?
What is the month with the least sunshine in Williams?
How many hours of sunshine does Williams have in December?
What is the month with the lowest UV index in Williams?
What is the UV index reading in December in Williams?
Average temperature in December
Williams, AZ
- Average high temperature in December: 44.4°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (44.4°F).
- Average low temperature in December: 27°F
The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is December (27°F).
Average pressure in December
Williams, AZ
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Williams, AZ
- Average wind speed in December: 6.9mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in December
Williams, AZ
- Average humidity in December: 61%
The month with the highest relative humidity is January (63%).
The month with the lowest relative humidity is June (23%).
Average rainfall in December
Williams, AZ
- Average rainfall in December: 0.94"
The wettest month (with the highest rainfall) is July (1.38").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in December
Williams, AZ
- Average rainfall days in December: 4.3 days
The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is June (2.1 days).
Average snowfall in December
Williams, AZ
- Average snowfall in December: 5.94"
The month with the highest snowfall is December (5.94").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Williams, AZ
- Average snowfall days in December: 6.2 days
The month with the highest number of snowfall days is December (6.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Williams, AZ
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in December: 6h and 5min
The month with the most sunshine is June (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in December
Williams, AZ
- Average sunshine days in December: 22.5 days
The month with the most sunshine days is June (26.9 days).
The month with the least sunshine days is August (13.1 days).
Average UV index in December
Williams, AZ
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Williams, AZ
- Average cloud cover in December: 23
The month with the most cloud cover is December (Cloud cover 23).
The month with the least cloud cover is June (Cloud cover 6).
Average visibility in December
Williams, AZ
- 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, Arizona, USA
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