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 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
The start of December involves a subtle temperature drop, shifting from a comfortable 64.9°F (18.3°C) in November to a moderate 59.5°F (15.3°C). Montalvo's nights in December cool down to an average low-temperature of 50°F (10°C).Humidity
In Montalvo, the average relative humidity in December is 59%.Rainfall
In Montalvo, California, in December, it is raining for 5.5 days, with typically 1.14" (29mm) of accumulated precipitation. Throughout the year, there are 47.8 rainfall days, and 6.97" (177mm) of precipitation is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 54min of daylight.On the first day of the month, sunrise is at 6:45 am and sunset at 4:47 pm. On the last day of December, sunrise is at 7:02 am and sunset at 4:57 pm PST.
Sunshine
The months with the least sunshine are January, February and December, with an average of 6.8h of sunshine.UV index
December is the month with the lowest UV index, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: An average maximum UV index of 3 in December leads to these recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Frequently asked questions
What is the average December temperature in Montalvo?
What is the average humidity in December in Montalvo?
How many days does it rain in December in Montalvo?
What is the month with the shortest days in Montalvo?
What is the average length of the day in December in Montalvo?
When is the sunrise / sunset in December in Montalvo?
What is the month with the least sunshine in Montalvo?
How long on average sun shines in December in Montalvo?
What is the month with the lowest UV index in Montalvo?
What is the UV index reading in December in Montalvo?
Average temperature in December
Montalvo, CA
- Average high temperature in December: 59.5°F
The warmest months (with the highest average high temperature) are August and September (74.3°F).
The month with the lowest average high temperature is February (59°F).
- Average low temperature in December: 50°F
The month with the highest average low temperature is August (62.6°F).
The coldest month (with the lowest average low temperature) is February (48.9°F).
Average pressure in December
Montalvo, CA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is September (29.9"Hg).
Average wind speed in December
Montalvo, CA
- Average wind speed in December: 6.5mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest months (with the lowest average wind speed) are August and September (5mph).
Average humidity in December
Montalvo, CA
- Average humidity in December: 59%
The months with the highest relative humidity are June and July (69%).
The month with the lowest relative humidity is November (56%).
Average rainfall in December
Montalvo, CA
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is January (1.34").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days in December
Montalvo, CA
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is March (6 days).
The month with the least rainy days is August (2.1 days).
Average daylight in December /
Average sunshine in December
Montalvo, CA
- Average daylight in December: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in December: 6h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).
Average sunshine days in December
Montalvo, CA
- Average sunshine days in December: 24.6 days
The month with the most sunshine days is October (26 days).
The month with the least sunshine days is July (20.4 days).
Average UV index in December
Montalvo, CA
- Average UV index in December: 3
The month with the highest UV index is August (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Montalvo, CA
- Average cloud cover in December: 21
The month with the most cloud cover is March (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in December
Montalvo, 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).
Montalvo, California, USA
Weather forecast for your location
2. Allow the app to use your location
