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
With average high temperatures of 54°F (12.2°C) and lows of 39.6°F (4.2°C), December is the coldest month.Humidity
In December, the average relative humidity is 69%.Rainfall
In Loomis, during December, the rain falls for 11.3 days and regularly aggregates up to 3.78" (96mm) of precipitation. In Loomis, California, during the entire year, the rain falls for 81.2 days and collects up to 22.64" (575mm) of precipitation.Snowfall
Months with snowfall are February and December. The months with the most snowfall are February and December, with an average 0.04" (1mm) of accumulated snow.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:04 am and sunset at 4:43 pm. On the last day of December, sunrise is at 7:23 am and sunset at 4:53 pm PST.
Sunshine
December has the least sunshine of the year, with an average of 5.8h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum UV index of 3 in December translates into the following recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
What is the average December temperature?
What is the average humidity in December?
How many days does it rain in December?
What is the snowiest month?
When does it start snowing?
What is the month with the shortest days?
How many hours of daylight does Loomis have in December?
When 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?
What is the UV index reading in December?
Average temperature in December
Loomis, CA
- Average high temperature in December: 54°F
The warmest month (with the highest average high temperature) is July (93°F).
The month with the lowest average high temperature is December (54°F).
- Average low temperature in December: 39.6°F
The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is December (39.6°F).
Average pressure in December
Loomis, CA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Loomis, CA
- Average wind speed in December: 4.8mph
The windiest month (with the highest average wind speed) is February (5.5mph).
The calmest months (with the lowest average wind speed) are August and September (4mph).
Average humidity in December
Loomis, CA
- Average humidity in December: 69%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is July (40%).
Average rainfall in December
Loomis, CA
- Average rainfall in December: 3.78"
The wettest month (with the highest rainfall) is March (4.33").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Loomis, CA
- Average rainfall days in December: 11.3 days
The month with the highest number of rainy days is March (14.6 days).
The month with the least rainy days is July (1 days).
Average snowfall in December
Loomis, CA
- Average snowfall in December: 0.04"
The months with the highest snowfall are February and December (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Loomis, CA
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is December (0.2 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Loomis, CA
- Average daylight in December: 9h and 3min
The month with the longest days is June (Average daylight: 14h and 48min).
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 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in December
Loomis, CA
- Average sunshine days in December: 19.3 days
The month with the most sunshine days is July (29.2 days).
The month with the least sunshine days is March (15.7 days).
Average UV index in December
Loomis, 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
Loomis, CA
- Average cloud cover in December: 34
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in December
Loomis, 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).
Loomis, California, USA
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