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
Eureka's lowest temperatures tend to occur in February and December, with an average high-temperature of 52.9°F (11.6°C).Humidity
In December, the average relative humidity in Eureka is 78%.Rainfall
The month with the most rainfall is December, when the rain falls for 10.8 days and typically aggregates up to 1.73" (44mm) of precipitation.Snowfall
In Eureka, snow does not fall in January, March through December.Daylight
The month with the shortest days in Eureka is December, with an average of 9h and 18min of daylight.On the first day of the month, sunrise is at 7:22 am and sunset at 4:49 pm. On the last day of December, in Eureka, sunrise is at 7:40 am and sunset at 4:59 pm PST.
Sunshine
With an average of 5.2h of sunshine, December has the least sunshine of the year.UV index
January through March, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Eureka. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In December, the maximum UV index of 3 transforms into these recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
What time of the year is the coldest in Eureka?
What are December temperatures in Eureka?
What is the average humidity in December in Eureka?
What is the wettest month in Eureka?
How much does it rain in Eureka in December?
When it does not snow in Eureka?
What is the month with the shortest days in Eureka?
How many hours of daylight does Eureka have in December?
When is the sunrise / sunset in December in Eureka?
What is the month with the least sunshine in Eureka?
How many hours of sunshine does Eureka have in December?
What are the months with the lowest UV index in Eureka?
What is the UV index intensity in December in Eureka?
Average temperature in December
Eureka, CA
- Average high temperature in December: 52.9°F
The warmest month (with the highest average high temperature) is August (68.4°F).
The months with the lowest average high temperature are February and December (52.9°F).
- Average low temperature in December: 43.7°F
The month with the highest average low temperature is August (52.9°F).
The coldest month (with the lowest average low temperature) is February (42.4°F).
Average pressure in December
Eureka, CA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).
Average wind speed in December
Eureka, CA
- Average wind speed in December: 8.5mph
The windiest month (with the highest average wind speed) is March (9mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).
Average humidity in December
Eureka, CA
- Average humidity in December: 78%
The month with the highest relative humidity is March (82%).
The month with the lowest relative humidity is October (76%).
Average rainfall in December
Eureka, CA
- Average rainfall in December: 1.73"
The wettest month (with the highest rainfall) is December (1.73").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in December
Eureka, CA
- Average rainfall days in December: 10.8 days
The month with the highest number of rainy days is March (11.2 days).
The month with the least rainy days is August (1.7 days).
Average snowfall in December
Eureka, 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
Eureka, CA
- Average snowfall days in December: 0.1 days
The months with the highest number of snowfall days are February and December (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in December /
Average sunshine in December
Eureka, CA
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 5h and 1min
The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in December
Eureka, CA
- Average sunshine days in December: 18.9 days
The month with the most sunshine days is July (27.7 days).
The month with the least sunshine days is March (17.9 days).
Average UV index in December
Eureka, CA
- Average UV index in December: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover in December
Eureka, CA
- Average cloud cover in December: 43
The month with the most cloud cover is March (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 16).
Average visibility in December
Eureka, CA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Eureka, California, USA
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