December weather forecast
Riverview Farms, CA

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Weather in December

The first month of the winter, December, is still a refreshing month in Riverview Farms, California, with an average temperature ranging between min 46.6°F (8.1°C) and max 63.7°F (17.6°C).

Temperature

The month of December sees the lowest average temperatures, reaching 63.7°F (17.6°C) at the peak and 46.6°F (8.1°C) at the low.

Humidity

The average relative humidity in December in Riverview Farms is 58%.

Rainfall

In Riverview Farms, in December, during 5.1 rainfall days, 0.71" (18mm) of precipitation is typically accumulated. Throughout the year, there are 49.6 rainfall days, and 5.16" (131mm) of precipitation is accumulated.

Daylight

With an average of 10h and 0min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:32 am and sunset at 4:41 pm. On the last day of December, sunrise is at 6:50 am and sunset at 4:52 pm PST.

Sunshine

With an average of 6.7h of sunshine, December has the least sunshine of the year.

UV index

With an average maximum UV index of 3, December is the month with the lowest UV index. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum daily UV index of 3 in December converts into the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.

Frequently asked questions

What are the coldest months?

Riverview Farms's coldest month, December, generally records average temperatures ranging from a high of 63.7°F (17.6°C) to a low of 46.6°F (8.1°C).

What is the usual temperature for Riverview Farms in December?

In December, in Riverview Farms, the average high-temperature is 63.7°F (17.6°C), and the average low-temperature is 46.6°F (8.1°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), 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 Riverview Farms, the average relative humidity in December is 58%.

How much does it rain in December?

In Riverview Farms, during December, the rain falls for 5.1 days and regularly aggregates up to 0.71" (18mm) of precipitation.

What is the month with the shortest days in Riverview Farms?

December has the shortest days of the year, with an average of 10h and 0min of daylight.

What is the average length of the day in December in Riverview Farms?

The average day length in December is 10h and 2min.

What time are sunrise and sunset in December?

On the first day of December, sunrise is at 6:32 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 4:52 pm PST.

What is the month with the least sunshine?

The month with the least sunshine in Riverview Farms is December, with an average of 6.7h of sunshine.

How long on average sun shines in December?

The average sunshine duration in December is 6.7h.

When is the lowest UV index?

The month with the lowest UV index is December, with an average maximum UV index of 3.

What is the UV index reading in December?

In December, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Riverview Farms, CA

Average temperature in December - Riverview Farms, CA
  • Average high temperature in December: 63.7°F

The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is December (63.7°F).

  • Average low temperature in December: 46.6°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is February (46°F).

Average pressure in December
Riverview Farms, CA

Average pressure in December - Riverview Farms, CA
  • Average pressure in December: 30.06"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).

Average wind speed in December
Riverview Farms, CA

Average wind speed in December - Riverview Farms, CA
  • Average wind speed in December: 4.8mph

The windiest months (with the highest average wind speed) are April and May (5.3mph).
The calmest months (with the lowest average wind speed) are August, September and October (4.2mph).

Average humidity in December
Riverview Farms, CA

Average humidity in December - Riverview Farms, CA
  • Average humidity in December: 58%

The month with the highest relative humidity is May (65%).
The month with the lowest relative humidity is November (52%).

Average rainfall in December
Riverview Farms, CA

Average rainfall in December - Riverview Farms, CA
  • Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is February (1.06").
The driest month (with the least rainfall) is June (0.04").

Average rainfall days in December
Riverview Farms, CA

Average rainfall days in December - Riverview Farms, CA
  • Average rainfall days in December: 5.1 days

The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is June (1.4 days).

Average daylight in December /
Average sunshine in December
Riverview Farms, CA

Average daylight in December / Average sunshine in December - Riverview Farms, CA
  • Average daylight in December: 10h and 0min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in December: 6h and 4min

The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).

Average sunshine days in December
Riverview Farms, CA

Average sunshine days in December - Riverview Farms, CA
  • Average sunshine days in December: 25.2 days

The month with the most sunshine days is June (28 days).
The month with the least sunshine days is July (20.7 days).

Average UV index in December
Riverview Farms, CA

Average UV index in December - Riverview Farms, CA
  • Average UV index in December: 3

The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).

Average cloud cover in December
Riverview Farms, CA

Average cloud cover in December - Riverview Farms, CA
  • Average cloud cover in December: 23

The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 6).

Average visibility in December
Riverview Farms, CA

Average visibility in December - Riverview Farms, 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).

Riverview Farms, California, USA

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