August weather forecast and climate
Eureka, CA

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

Weather in August

August, the last month of the summer, in Eureka, is a pleasant month, with average temperature varying between 68.4°F (20.2°C) and 52.9°F (11.6°C).

Temperature

August is the warmest month, with an average high-temperature of 68.4°F (20.2°C) and an average low-temperature of 52.9°F (11.6°C).

Humidity

In August, the average relative humidity is 81%.

Rainfall

In August, the rain falls for 1.7 days. Throughout August, 0.12" (3mm) of precipitation is accumulated. In Eureka, during the entire year, the rain falls for 77.3 days and collects up to 8.58" (218mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in August is 13.7h.

Sunshine

Months with the most sunshine in Eureka, California, are July and August, with an average of 11.6h of sunshine.

UV index

In August, the average daily maximum UV index in Eureka is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV radiation for average individuals.
Note: In August, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the warmest month in Eureka?

With an average high-temperature of 68.4°F (20.2°C) and an average low-temperature of 52.9°F (11.6°C), August is the warmest month in Eureka, California.

What is the temperature in August in Eureka?

In Eureka, in August, the average high-temperature is 68.4°F (20.2°C), and the average low-temperature is 52.9°F (11.6°C).

What is the average humidity in August in Eureka?

In Eureka, California, the average relative humidity in August is 81%.

How much does it rain in Eureka in August?

In Eureka, California, in August, it is raining for 1.7 days, with typically 0.12" (3mm) of accumulated precipitation.

When it does not snow in Eureka?

January, March through December are months without snowfall in Eureka, California.

What is the average length of the day in August in Eureka?

The average length of the day in August in Eureka, California, is 13.7h.

What is the month with the most sunshine in Eureka?

Months with the most sunshine in Eureka, California, are July and August, with an average of 11.6h of sunshine.

How many hours of sunshine does Eureka have in August?

The average sunshine in August in Eureka, California, is 11.6h.

How high is the UV index in August in Eureka?

The average daily maximum UV index in August in Eureka is 4. A UV Index reading of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in August
Eureka, CA

Average temperature in August - Eureka, CA
  • Average high temperature in August: 68.4°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 August: 52.9°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 August
Eureka, CA

Average pressure in August - Eureka, CA
  • Average pressure in August: 29.96"

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 August
Eureka, CA

Average wind speed in August - Eureka, CA
  • Average wind speed in August: 6.2mph

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 August
Eureka, CA

Average humidity in August - Eureka, CA
  • Average humidity in August: 81%

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 August
Eureka, CA

Average rainfall in August - Eureka, CA
  • Average rainfall in August: 0.12"

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 August
Eureka, CA

Average rainfall days in August - Eureka, CA
  • Average rainfall days in August: 1.7 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 August
Eureka, CA

Average snowfall in August - Eureka, CA
  • Average snowfall in August: 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 August
Eureka, CA

Average snowfall days in August - Eureka, CA
  • Average snowfall days in August: 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 August /
Average sunshine in August
Eureka, CA

Average daylight in August / Average sunshine in August - Eureka, CA
  • Average daylight in August: 13.7h

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 August: 11.6h

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 August
Eureka, CA

Average sunshine days in August - Eureka, CA
  • Average sunshine days in August: 27.4 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 August
Eureka, CA

Average UV index in August - Eureka, CA
  • Average UV index in August: 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 August
Eureka, CA

Average cloud cover in August - Eureka, CA
  • Average cloud cover in August: 16

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 August
Eureka, CA

Average visibility in August - Eureka, CA
  • Average visibility in August: 5mi

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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