December weather forecast
Morgan Hill, CA

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Weather in December

December, the first month of the winter in Morgan Hill, is also a moderate month, with an average temperature varying between 55.9°F (13.3°C) and 40.6°F (4.8°C).

Temperature

The lowest temperatures are recorded in December, with averages reaching a high of 55.9°F (13.3°C) and a low of 40.6°F (4.8°C).

Humidity

In Morgan Hill, the average relative humidity in December is 72%.

Rainfall

In Morgan Hill, during December, the rain falls for 9.1 days and regularly aggregates up to 1.89" (48mm) of precipitation. In Morgan Hill, during the entire year, the rain falls for 68.2 days and collects up to 10.79" (274mm) of precipitation.

Daylight

December has the shortest days of the year, with an average of 9h and 42min of daylight.
On the first day of December, sunrise is at 7:02 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:59 pm PST.

Sunshine

The month with the least sunshine is December, with an average of 6h 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 health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, a regular UV index of 3 translates into these guidelines:
Put precautions into practice - Ensuring skin and eye safety is a necessity. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Updated: Aug 25, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the coldest?

December brings the lowest temperatures, with an average high of 55.9°F (13.3°C) and an average low of 40.6°F (4.8°C).

What is the temperature in December?

December temperatures vary between a high-temperature of 55.9°F (13.3°C) and a low-temperature of 40.6°F (4.8°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in September is computed to be 84.2°F (29°C).

What is the average humidity in December?

In December, the average relative humidity is 72%.

How much does it rain in December?

In Morgan Hill, during December, the rain falls for 9.1 days and regularly aggregates up to 1.89" (48mm) of precipitation.

What is the month with the shortest days in Morgan Hill?

The month with the shortest days is December, with an average of 9h and 42min of daylight.

How many hours of daylight does Morgan Hill have in December?

The average day length in December is 9h and 40min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 7:02 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:59 pm PST.

What is the month with the least sunshine?

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

How long on average sun shines in December?

The average sunshine duration in December is 6h.

What is the month with the lowest UV index?

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

What is the UV index reading in December?

In Morgan Hill, 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 exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Morgan Hill, CA

Average temperature in December - Morgan Hill, CA
  • Average high temperature in December: 55.9°F

The warmest months (with the highest average high temperature) are July and August (85.5°F).
The month with the lowest average high temperature is December (55.9°F).

  • Average low temperature in December: 40.6°F

The month with the highest average low temperature is August (55°F).
The coldest months (with the lowest average low temperature) are February and December (40.6°F).

Average pressure in December
Morgan Hill, CA

Average pressure in December - Morgan Hill, CA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

Average wind speed in December
Morgan Hill, CA

Average wind speed in December - Morgan Hill, CA
  • Average wind speed in December: 4.3mph

The windiest month (with the highest average wind speed) is May (5.4mph).
The calmest months (with the lowest average wind speed) are January and November (4mph).

Average humidity in December
Morgan Hill, CA

Average humidity in December - Morgan Hill, CA
  • Average humidity in December: 72%

The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (56%).

Average rainfall in December
Morgan Hill, CA

Average rainfall in December - Morgan Hill, CA
  • Average rainfall in December: 1.89"

The wettest month (with the highest rainfall) is January (1.97").
The driest months (with the least rainfall) are July and August (0.04").

Average rainfall days in December
Morgan Hill, CA

Average rainfall days in December - Morgan Hill, CA
  • Average rainfall days in December: 9.1 days

The month with the highest number of rainy days is March (12.4 days).
The month with the least rainy days is August (0.8 days).

Average daylight in December /
Average sunshine in December
Morgan Hill, CA

Average daylight in December / Average sunshine in December - Morgan Hill, CA
  • Average daylight in December: 9h and 4min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in December: 6h and 0min

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

Average sunshine days in December
Morgan Hill, CA

Average sunshine days in December - Morgan Hill, CA
  • Average sunshine days in December: 20.7 days

The month with the most sunshine days is August (29.1 days).
The month with the least sunshine days is March (17.3 days).

Average UV index in December
Morgan Hill, CA

Average UV index in December - Morgan Hill, CA
  • Average UV index in December: 3

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 3).

Average cloud cover in December
Morgan Hill, CA

Average cloud cover in December - Morgan Hill, CA
  • Average cloud cover in December: 33

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 5).

Average visibility in December
Morgan Hill, CA

Average visibility in December - Morgan Hill, 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).

Morgan Hill, California, USA

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