October weather forecast and climate
Walnut Creek, CA

Vast fields and forest slopes of the iconic Mount Diablo State Park within the Walnut Creek in California
Vast fields and forest slopes of the iconic Mount Diablo State Park within the Walnut Creek in California

Weather in October

October, the same as September, is a moderately hot autumn month in Walnut Creek, California, with average temperature ranging between min 54.3°F (12.4°C) and max 74.1°F (23.4°C).

Temperature

In Walnut Creek, California, the average high-temperature marginally drops, from a warm 81.5°F (27.5°C) in September, to a still moderately hot 74.1°F (23.4°C). In Walnut Creek, the average low-temperature is 54.3°F (12.4°C).

Humidity

Months with the lowest humidity in Walnut Creek are September and October, with an average relative humidity of 58%.

Rainfall

In October, the rain falls for 4.4 days. Throughout October, 0.47" (12mm) of precipitation is accumulated. In Walnut Creek, during the entire year, the rain falls for 68.7 days and collects up to 11.26" (286mm) of precipitation.

Daylight

In October, the average length of the day in Walnut Creek is 11.2h.

Sunshine

In October, the average sunshine in Walnut Creek is 7.1h.

UV index

In October, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: In October, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 are the least humid months in Walnut Creek?

September and October, with an average relative humidity of 58%, are the least humid months.

What is the average humidity in October in Walnut Creek?

In Walnut Creek, California, the average relative humidity in October is 58%.

How much does it rain in Walnut Creek in October?

In Walnut Creek, California, in October, during 4.4 rainfall days, 0.47" (12mm) of precipitation is typically accumulated.

How many hours of daylight does Walnut Creek have in October?

In October, the average length of the day in Walnut Creek, California, is 11.2h.

How long on average sun shines in October in Walnut Creek?

The average sunshine in October in Walnut Creek is 7.1h.

What is the UV index intensity in October in Walnut Creek?

In October, the average daily maximum UV index in Walnut Creek, California, is 4. A UV Index reading of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV rays.

Average temperature in October
Walnut Creek, CA

Average temperature in October - Walnut Creek, CA
  • Average high temperature in October: 74.1°F

The warmest month (with the highest average high temperature) is July (82.8°F).
The month with the lowest average high temperature is December (55.4°F).

  • Average low temperature in October: 54.3°F

The month with the highest average low temperature is September (57.2°F).
The coldest months (with the lowest average low temperature) are January and December (42.4°F).

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Average pressure in October
Walnut Creek, CA

Average pressure in October - Walnut Creek, CA
  • Average pressure in October: 29.98"

The month with the highest atmospheric pressure is January (30.14").
The month with the lowest atmospheric pressure is June (29.91").

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Average wind speed in October
Walnut Creek, CA

Average wind speed in October - Walnut Creek, CA
  • Average wind speed in October: 4.8mph

The windiest month (with the highest average wind speed) is May (7.3mph).
The calmest month (with the lowest average wind speed) is November (4.4mph).

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Average humidity in October
Walnut Creek, CA

Average humidity in October - Walnut Creek, CA
  • Average humidity in October: 58%

The month with the highest relative humidity is March (74%).
Months with the lowest relative humidity are September and October (58%).

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Average rainfall in October
Walnut Creek, CA

Average rainfall in October - Walnut Creek, CA
  • Average rainfall in October: 0.47"

The wettest month (with the highest rainfall) is February (2.4").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in October
Walnut Creek, CA

Average rainfall days in October - Walnut Creek, CA
  • Average rainfall days in October: 4.4 days

The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.8 days).

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Average daylight in October /
Average sunshine in October
Walnut Creek, CA

Average daylight in October / Average sunshine in October - Walnut Creek, CA
  • Average daylight in October: 11.2h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in October: 7.1h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 5.8h).

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Average sunshine days in October
Walnut Creek, CA

Average sunshine days in October - Walnut Creek, CA
  • Average sunshine days in October: 25.8 days

The month with the most sunshine days is August (29.6 days).
The month with the least sunshine days is March (17.5 days).

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Average UV index in October
Walnut Creek, CA

Average UV index in October - Walnut Creek, CA
  • Average UV index in October: 4

Months with the highest UV index are June and July (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in October
Walnut Creek, CA

Average cloud cover in October - Walnut Creek, CA
  • Average cloud cover in October: 17

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 8).

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Average visibility in October
Walnut Creek, CA

Average visibility in October - Walnut Creek, CA
  • Average visibility in October: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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