Contents
- Weather in October
- Frequently asked questions
- Average temperature in October
- Average pressure in October
- Average wind speed in October
- Average humidity in October
- Average rainfall in October
- Average rainfall days in October
- Average snowfall in October
- Average snowfall days in October
- Average daylight in October
- Average sunshine in October
- Average sunshine days in October
- Average UV index in October
- Average cloud cover in October
- Average visibility in October
Weather in October
Temperature
Eureka's weather subtly changes with the onset of October, barely falling from an agreeable 68.2°F (20.1°C) in September to a refreshing 62.6°F (17°C). During the month of October, the temperature falls to an average of 50°F (10°C).Humidity
The least humid month in Eureka is October, with an average relative humidity of 76%.Rainfall
In Eureka, in October, during 4.9 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. Throughout the year, there are 77.3 rainfall days, and 8.58" (218mm) of precipitation is accumulated.Snowfall
In Eureka, snow does not fall in January, March through December.Daylight
The average length of the day in October is 11h and 6min.On the first day of the month, sunrise is at 7:14 am and sunset at 6:58 pm. On the last day of October, in Eureka, sunrise is at 7:46 am and sunset at 6:13 pm PDT.
Sunshine
In October, the average sunshine is 6.7h.UV index
In Eureka, the average daily maximum UV index in October is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum daily UV index of 4 in October interprets into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Frequently asked questions
What are the temperatures in Eureka in October?
What is the least humid month in Eureka?
What is the average humidity in October in Eureka?
How much does it rain in Eureka in October?
When it does not snow in Eureka?
What is the average length of the day in October in Eureka?
What time are sunrise and sunset in October in Eureka?
How many hours of sunshine does Eureka have in October?
How high is the UV index in October in Eureka?
Average temperature in October
Eureka, CA
- Average high temperature in October: 62.6°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 October: 50°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 October
Eureka, CA
- Average pressure in October: 30.03"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 October
Eureka, CA
- Average wind speed in October: 7.4mph
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 October
Eureka, CA
- Average humidity in October: 76%
The month with the highest relative humidity is March (82%).
The month with the lowest relative humidity is October (76%).
Average rainfall in October
Eureka, CA
- Average rainfall in October: 0.51"
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 October
Eureka, CA
- Average rainfall days in October: 4.9 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 October
Eureka, CA
- Average snowfall in October: 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 October
Eureka, CA
- Average snowfall days in October: 0 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 October /
Average sunshine in October
Eureka, CA
- Average daylight in October: 11h and 1min
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 October: 6h and 4min
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 October
Eureka, CA
- Average sunshine days in October: 24.7 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 October
Eureka, CA
- Average UV index in October: 4
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 October
Eureka, CA
- Average cloud cover in October: 24
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 October
Eureka, CA
- Average visibility in October: 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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