December weather forecast
Loomis, CA

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Weather in December

The first month of the winter, December, is still a cool month in Loomis, California, with an average temperature varying between 39.6°F (4.2°C) and 54°F (12.2°C).

Temperature

December, with its average high-temperature of 54°F (12.2°C) and an average low-temperature of 39.6°F (4.2°C), holds the record as 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, during the entire year, the rain falls for 81.2 days and collects up to 22.64" (575mm) of precipitation.

Snowfall

Months with snowfall in Loomis are February and December. The months with the most snowfall are February and December, with an average 0.04" (1mm) of accumulated snow.

Daylight

December has the shortest days of the year in Loomis, with an average of 9h and 30min of daylight.
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, in Loomis, sunrise is at 7:23 am and sunset at 4:53 pm PST.

Sunshine

The month with the least sunshine in Loomis 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 unsafe exposure to UV radiation for the ordinary person.
Note: A daily maximum UV index of 3 in December translates into the following instructions:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
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Frequently asked questions

What time of the year is the coldest in Loomis?

Loomis's coldest month, December, generally records average temperatures ranging from a high of 54°F (12.2°C) to a low of 39.6°F (4.2°C).

What are the temperatures in Loomis in December?

In December, the average high-temperature and low-temperature in Loomis, California, are 54°F (12.2°C) and 39.6°F (4.2°C) respectively. The average heat index (a.k.a. 'real feel', 'feels like'), which represents the influence of relative humidity on air temperature, in September is appraised at 86°F (30°C).

What is the average humidity in December in Loomis?

In December, the average relative humidity in Loomis is 69%.

How much does it rain in Loomis in December?

In Loomis, California, during December, the rain falls for 11.3 days and regularly aggregates up to 3.78" (96mm) of precipitation.

What is the snowiest month in Loomis?

The months with the most snowfall in Loomis, California, are February and December, with an average 0.04" (1mm) of accumulated snow.

When does it start snowing in Loomis?

December is the first month it typically snows in Loomis, California. Throughout December, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow.

What is the month with the shortest days in Loomis?

December has the shortest days of the year in Loomis, California, with an average of 9h and 30min of daylight.

What is the average length of the day in December in Loomis?

The average day length in December in Loomis, California, is 9h and 30min.

What time are sunrise and sunset in December in Loomis?

In December, on the first day of the month, sunrise is at 7:04 am and sunset at 4:43 pm. On the last day of the month, in Loomis, California, sunrise is at 7:23 am and sunset at 4:53 pm PST.

What is the month with the least sunshine in Loomis?

The month with the least sunshine in Loomis is December, with an average of 5.8h of sunshine.

How many hours of sunshine does Loomis have in December?

In Loomis, California, the average sunshine duration in December is 5.8h.

When is the lowest UV index in Loomis?

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Loomis, California.

What is the UV index reading in December in Loomis?

In Loomis, the average daily maximum UV index in December is 3. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Loomis, CA

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).

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Average pressure in December
Loomis, CA

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).

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Average wind speed in December
Loomis, CA

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).

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Average humidity in December
Loomis, CA

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%).

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Average rainfall in December
Loomis, CA

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").

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Average rainfall days in December
Loomis, CA

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).

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Average snowfall in December
Loomis, CA

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").

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Average snowfall days in December
Loomis, CA

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).

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Average daylight in December /
Average sunshine in December
Loomis, CA

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).

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Average sunshine days in December
Loomis, CA

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).

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Average UV index in December
Loomis, CA

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).

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Average cloud cover in December
Loomis, CA

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).

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Average visibility in December
Loomis, CA

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).

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Loomis, California, USA

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