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 snowfall in December
- Average snowfall 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
December, on average, is the coldest month, registering a high temperature of 54.7°F (12.6°C) and a low of 39.4°F (4.1°C).Humidity
In Middletown, California, the average relative humidity in December is 73%.Rainfall
In Middletown, California, in December, during 11.2 rainfall days, 3.15" (80mm) of precipitation is typically accumulated. In Middletown, during the entire year, the rain falls for 77 days and collects up to 17.05" (433mm) of precipitation.Snowfall
January, March through December are months without snowfall.Daylight
With an average of 9h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:10 am and sunset at 4:49 pm. On the last day of December, in Middletown, California, sunrise is at 7:28 am and sunset at 4:59 pm PST.
Sunshine
With an average of 5.5h of sunshine, December has the least sunshine of the year.UV index
December is the month with the lowest UV index in Middletown, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 2 during December translates into these guidelines:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Frequently asked questions
What part of the year is the coldest in Middletown?
What are December temperatures in Middletown?
What is the average humidity in December in Middletown?
How many days does it rain in December in Middletown?
When it does not snow in Middletown?
What is the month with the shortest days in Middletown?
What is the average length of the day in December in Middletown?
What time are sunrise and sunset in December in Middletown?
What is the month with the least sunshine in Middletown?
How many hours of sunshine does Middletown have in December?
When is the lowest UV index in Middletown?
What is the UV index intensity in December in Middletown?
Average temperature in December
Middletown, CA
- Average high temperature in December: 54.7°F
The warmest month (with the highest average high temperature) is August (87.8°F).
The month with the lowest average high temperature is December (54.7°F).
- Average low temperature in December: 39.4°F
The month with the highest average low temperature is July (55.4°F).
The coldest month (with the lowest average low temperature) is December (39.4°F).
Average pressure in December
Middletown, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.91"Hg).
Average wind speed in December
Middletown, CA
- Average wind speed in December: 4.5mph
The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest month (with the lowest average wind speed) is November (4.3mph).
Average humidity in December
Middletown, CA
- Average humidity in December: 73%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is September (53%).
Average rainfall in December
Middletown, CA
- Average rainfall in December: 3.15"
The wettest month (with the highest rainfall) is February (3.78").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in December
Middletown, CA
- Average rainfall days in December: 11.2 days
The month with the highest number of rainy days is March (13.6 days).
The month with the least rainy days is August (0.8 days).
Average snowfall in December
Middletown, CA
- Average snowfall in December: 0"
The month with the highest snowfall is February (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in December
Middletown, CA
- Average snowfall days in December: 0 days
The months with the highest number of snowfall days are February and March (0.1 days).
The months with the least snowfall days are January, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in December /
Average sunshine in December
Middletown, 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 3min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in December
Middletown, CA
- Average sunshine days in December: 18.9 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (15.8 days).
Average UV index in December
Middletown, CA
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in December
Middletown, CA
- Average cloud cover in December: 40
The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility in December
Middletown, CA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is March (5mi).
Middletown, California, USA
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