October weather forecast and climate
Eureka, CA

The Lost Fisherman
The Lost Fisherman's Memorial in scenic surroundings of Eureka, California

Weather in October

October, like September, in Eureka, California, is another enjoyable autumn month, with average temperature varying between 62.6°F (17°C) and 50°F (10°C).

Temperature

In October, the average high-temperature slightly decreases, from a pleasant 68.2°F (20.1°C) in September, to a comfortable 62.6°F (17°C). In October, the average low-temperature is 50°F (10°C).

Humidity

October is the least humid month in Eureka, with an average relative humidity of 76%.

Rainfall

In Eureka, California, in October, during 4.9 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. In Eureka, during the entire year, the rain falls for 77.3 days and collects up to 8.58" (218mm) of precipitation.

Snowfall

January, March through December are months without snowfall.

Daylight

The average length of the day in Eureka, California, is 11.1h.

Sunshine

In Eureka, the average sunshine is 6.7h.

UV index

In Eureka, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in October in Eureka?

In October, in Eureka, the average high-temperature is 62.6°F (17°C), and the average low-temperature is 50°F (10°C).

What is the least humid month in Eureka?

The least humid month is October, with an average relative humidity of 76%.

What is the average humidity in October in Eureka?

In Eureka, the average relative humidity in October is 76%.

How much does it rain in Eureka in October?

In Eureka, in October, during 4.9 rainfall days, 0.51" (13mm) of precipitation is typically accumulated.

When it does not snow in Eureka?

In Eureka, California, snow does not fall in January, March through December.

How many hours of daylight does Eureka have in October?

In October, the average length of the day in Eureka is 11.1h.

How long on average sun shines in October in Eureka?

In Eureka, the average sunshine in October is 6.7h.

What is the UV index intensity in October in Eureka?

The average daily maximum UV index in October in Eureka is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV rays.

Average temperature in October
Eureka, CA

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).
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).

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Average pressure in October
Eureka, CA

Average pressure in October - Eureka, CA
  • Average pressure in October: 30.03"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is August (29.96").

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Average wind speed in October
Eureka, CA

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).

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Average humidity in October
Eureka, CA

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%).

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Average rainfall in October
Eureka, CA

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").

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Average rainfall days in October
Eureka, CA

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).

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Average snowfall in October
Eureka, CA

Average snowfall in October - Eureka, CA
  • Average snowfall in October: 0"

The month with the highest snowfall is February (0.04").
Months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in October
Eureka, CA

Average snowfall days in October - Eureka, CA
  • Average snowfall days in October: 0 days

Months with the highest number of snowfall days are February and December (0.1 days).
Months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).

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Average daylight in October /
Average sunshine in October
Eureka, CA

Average daylight in October / Average sunshine in October - Eureka, CA
  • Average daylight in October: 11.1h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in October: 6.7h

Months with the most sunshine are July and August (Average sunshine: 11.6h).
The month with the least sunshine is December (Average sunshine: 5.2h).

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Average sunshine days in October
Eureka, CA

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).

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Average UV index in October
Eureka, CA

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).
Months with the lowest UV index are January, February, March, November and December (UV index 3).

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Average cloud cover in October
Eureka, CA

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).
Months with the least cloud cover are July and August (Cloud cover 16).

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Average visibility in October
Eureka, CA

Average visibility in October - Eureka, CA
  • Average visibility in October: 6mi

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).

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