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
With average high and low temperatures of 38.3°F (3.5°C) and 24.1°F (-4.4°C) respectively, December is Mill Creek's coldest month.Humidity
In Mill Creek, the average relative humidity in December is 79%.Rainfall
In December, in Mill Creek, the rain falls for 8.9 days. Throughout December, 5.2" (132mm) of precipitation is accumulated. Throughout the year, in Mill Creek, California, there are 98.1 rainfall days, and 32.99" (838mm) of precipitation is accumulated.Snowfall
Months with snowfall in Mill Creek are January through June, September through December. In Mill Creek, California, in December, snow falls for 12.2 days, with typically accumulated 25.67" (652mm) of snow. In Mill Creek, during the entire year, snow falls for 66 days and aggregates up to 127.72" (3244mm) of snow.Daylight
The month with the shortest days in Mill Creek is December, with an average of 9h and 24min of daylight.On the first day of December in Mill Creek, sunrise is at 7:10 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 4:50 pm PST.
Sunshine
In December, the average sunshine in Mill Creek is 5.2h.UV index
The average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The daily high UV index of 2 in December translates into this advice:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the coldest month in Mill Creek?
Is December cold in Mill Creek?
What is the average humidity in December in Mill Creek?
How much does it rain in Mill Creek in December?
How much does it snow in Mill Creek in December?
What is the month with the shortest days in Mill Creek?
How many hours of daylight does Mill Creek have in December?
What time are sunrise and sunset in December in Mill Creek?
How many hours of sunshine does Mill Creek have in December?
What is the UV index intensity in December in Mill Creek?
Average temperature in December
Mill Creek, CA
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is December (38.3°F).
- Average low temperature in December: 24.1°F
The month with the highest average low temperature is July (49.5°F).
The coldest month (with the lowest average low temperature) is December (24.1°F).
Average pressure in December
Mill Creek, CA
- Average pressure in December: 30.16"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in December
Mill Creek, CA
- Average wind speed in December: 6mph
The windiest month (with the highest average wind speed) is March (6.7mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Mill Creek, CA
- Average humidity in December: 79%
The month with the highest relative humidity is March (83%).
The month with the lowest relative humidity is July (42%).
Average rainfall in December
Mill Creek, CA
- Average rainfall in December: 5.2"
The wettest month (with the highest rainfall) is March (5.59").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in December
Mill Creek, CA
- Average rainfall days in December: 8.9 days
The month with the highest number of rainy days is May (13.4 days).
The month with the least rainy days is August (4 days).
Average snowfall in December
Mill Creek, CA
- Average snowfall in December: 25.67"
The month with the highest snowfall is March (27.05").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Mill Creek, CA
- Average snowfall days in December: 12.2 days
The month with the highest number of snowfall days is March (14 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Mill Creek, CA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in December
Mill Creek, CA
- Average sunshine days in December: 14.6 days
The month with the most sunshine days is August (25 days).
The month with the least sunshine days is March (10.9 days).
Average UV index in December
Mill Creek, CA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February and November (UV index 1).
Average cloud cover in December
Mill Creek, CA
- Average cloud cover in December: 44
The month with the most cloud cover is March (Cloud cover 50).
The months with the least cloud cover are July and August (Cloud cover 7).
Average visibility in December
Mill Creek, CA
- Average visibility in December: 5mi
The months with the highest visibility are May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Mill Creek, California, USA
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