December weather forecast
Manteca, CA

Weather in December

The first month of the winter, December, is still a cool month in Manteca, California, with an average temperature fluctuating between 40.6°F (4.8°C) and 54.9°F (12.7°C).

Temperature

With an average high-temperature of 54.9°F (12.7°C) and an average low-temperature of 40.6°F (4.8°C), December is the coldest month.

Humidity

The average relative humidity in December in Manteca is 71%.

Rainfall

In Manteca, during 9.4 rainfall days, 1.93" (49mm) of precipitation is typically accumulated. Throughout the year, in Manteca, there are 67.8 rainfall days, and 11.22" (285mm) of precipitation is accumulated.

Snowfall

December is the only month when snow falls. The month with the most snowfall days is December, when snow falls for 0.1 days.

Daylight

With an average of 9h and 36min of daylight, December has the shortest days of the year.
On the first day of December in Manteca, sunrise is at 7:01 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:55 pm PST.

Sunshine

The month with the least sunshine is December, with an average of 6h of sunshine.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Manteca. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 3 in December transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
[Resources]

FAQ

What is the coldest month in Manteca?

The coldest month in Manteca, California, is December, with an average high-temperature of 54.9°F (12.7°C) and an average low-temperature of 40.6°F (4.8°C).

What is the temperature in December in Manteca?

The average high-temperature, in December, is 54.9°F (12.7°C), while the average low-temperature is 40.6°F (4.8°C). The average heat index (a.k.a. 'felt air temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in September is appraised at 89.6°F (32°C).

What is the average humidity in December in Manteca?

In Manteca, the average relative humidity in December is 71%.

How much does it rain in Manteca in December?

In Manteca, California, in December, during 9.4 rainfall days, 1.93" (49mm) of precipitation is typically accumulated.

When does it snow the most in Manteca?

December has the most snowfall days of the year in Manteca. Snow falls for 0.1 days.

When does it start snowing in Manteca?

December is the first month it typically snows in Manteca, California. Throughout December, there are 0.1 snowfall days.

What is the month with the shortest days in Manteca?

December has the shortest days of the year in Manteca, California, with an average of 9h and 36min of daylight.

How many hours of daylight does Manteca have in December?

In December, the average day length in Manteca, California, is 9h and 36min.

What time are sunrise and sunset in December in Manteca?

On the first day of December in Manteca, sunrise is at 7:01 am and sunset at 4:46 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:55 pm PST.

What is the month with the least sunshine in Manteca?

December has the least sunshine of the year in Manteca, California, with an average of 6h of sunshine.

How long on average sun shines in December in Manteca?

The average sunshine duration in December is 6h.

What are the months with the lowest UV index in Manteca?

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

What is the UV index intensity in December in Manteca?

The average daily maximum UV index in December is 3. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Manteca, CA

Average temperature in December - Manteca, CA
  • Average high temperature in December: 54.9°F

The warmest month (with the highest average high temperature) is July (94.6°F).
The month with the lowest average high temperature is December (54.9°F).

  • Average low temperature in December: 40.6°F

The month with the highest average low temperature is August (59.9°F).
The coldest month (with the lowest average low temperature) is December (40.6°F).

[Resources]

Average pressure in December
Manteca, CA

Average pressure in December - Manteca, 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 (29.91"Hg).

[Resources]

Average wind speed in December
Manteca, CA

Average wind speed in December - Manteca, CA
  • Average wind speed in December: 5.4mph

The windiest month (with the highest average wind speed) is June (6.8mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).

[Resources]

Average humidity in December
Manteca, CA

Average humidity in December - Manteca, CA
  • Average humidity in December: 71%

The month with the highest relative humidity is January (73%).
The month with the lowest relative humidity is July (42%).

[Resources]

Average rainfall in December
Manteca, CA

Average rainfall in December - Manteca, CA
  • Average rainfall in December: 1.93"

The wettest month (with the highest rainfall) is March (2.01").
The driest months (with the least rainfall) are July and August (0.08").

[Resources]

Average rainfall days in December
Manteca, CA

Average rainfall days in December - Manteca, CA
  • Average rainfall days in December: 9.4 days

The month with the highest number of rainy days is March (12 days).
The month with the least rainy days is August (1.2 days).

[Resources]

Average snowfall days in December
Manteca, CA

Average snowfall days in December - Manteca, CA
  • Average snowfall days in December: 0.1 days

The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).

[Resources]

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

Average daylight in December / Average sunshine in December - Manteca, CA
  • Average daylight in December: 9h and 36min

The month with the longest days is June (Average daylight: 14h and 44min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in December: 6h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

[Resources]

Average sunshine days in December
Manteca, CA

Average sunshine days in December - Manteca, CA
  • Average sunshine days in December: 20.5 days

The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is March (17.5 days).

[Resources]

Average UV index in December
Manteca, CA

Average UV index in December - Manteca, 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).

[Resources]

Average cloud cover in December
Manteca, CA

Average cloud cover in December - Manteca, CA
  • Average cloud cover in December: 33

The month with the most cloud cover is March (Cloud cover 34).
The month with the least cloud cover is July (Cloud cover 4).

[Resources]

Average visibility in December
Manteca, CA

Average visibility in December - Manteca, 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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location