October weather forecast and climate
Vallejo, CA

A colorful orange sunset skyline seen over the Napa River and Bridge in Vallejo, California
A colorful orange sunset skyline seen over the Napa River and Bridge in Vallejo, California

Weather in October

October, like September, is an agreeable autumn month in Vallejo, California, with average temperature fluctuating between 54°F (12.2°C) and 72.9°F (22.7°C).

Temperature

In Vallejo, the average high-temperature slightly decreases, from a moderately hot 80.1°F (26.7°C) in September, to an agreeable 72.9°F (22.7°C). In October, the average low-temperature is 54°F (12.2°C).

Humidity

Months with the lowest humidity are September and October, with an average relative humidity of 60%.

Rainfall

In Vallejo, during 3.4 rainfall days, 0.2" (5mm) of precipitation is typically accumulated. In Vallejo, during the entire year, the rain falls for 56.9 days and collects up to 4.88" (124mm) of precipitation.

Daylight

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

Sunshine

In Vallejo, the average sunshine is 7h.

UV index

In Vallejo, the average daily maximum UV index in October is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 4 transform into the following instructions:
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 temperature in October in Vallejo?

The average high-temperature, in October, in Vallejo, is 72.9°F (22.7°C), while the average low-temperature is 54°F (12.2°C).

What is the least humid month in Vallejo?

September and October, with an average relative humidity of 60%, are the least humid months in Vallejo, California.

What is the average humidity in October in Vallejo?

In October, the average relative humidity in Vallejo is 60%.

How much does it rain in Vallejo in October?

In Vallejo, California, in October, during 3.4 rainfall days, 0.2" (5mm) of precipitation is typically accumulated.

What is the average length of the day in October in Vallejo?

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

How many hours of sunshine does Vallejo have in October?

In Vallejo, California, the average sunshine in October is 7h.

What is the UV index intensity in October in Vallejo?

The average daily maximum UV index in October in Vallejo, California, is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in October
Vallejo, CA

Average temperature in October - Vallejo, CA
  • Average high temperature in October: 72.9°F

The warmest months (with the highest average high temperature) are July and September (80.1°F).
The month with the lowest average high temperature is December (55.4°F).

  • Average low temperature in October: 54°F

The month with the highest average low temperature is August (56.5°F).
The coldest month (with the lowest average low temperature) is January (43°F).

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Average pressure in October
Vallejo, CA

Average pressure in October - Vallejo, 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
Vallejo, CA

Average wind speed in October - Vallejo, CA
  • Average wind speed in October: 5mph

The windiest month (with the highest average wind speed) is May (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.6mph).

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Average humidity in October
Vallejo, CA

Average humidity in October - Vallejo, CA
  • Average humidity in October: 60%

The month with the highest relative humidity is March (75%).
Months with the lowest relative humidity are September and October (60%).

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Average rainfall in October
Vallejo, CA

Average rainfall in October - Vallejo, CA
  • Average rainfall in October: 0.2"

The wettest month (with the highest rainfall) is February (1.14").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in October
Vallejo, CA

Average rainfall days in October - Vallejo, CA
  • Average rainfall days in October: 3.4 days

The month with the highest number of rainy days is March (10.2 days).
The month with the least rainy days is August (0.9 days).

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

Average daylight in October / Average sunshine in October - Vallejo, 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: 7h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 5.7h).

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Average sunshine days in October
Vallejo, CA

Average sunshine days in October - Vallejo, CA
  • Average sunshine days in October: 25.5 days

The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is March (18.8 days).

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Average UV index in October
Vallejo, CA

Average UV index in October - Vallejo, CA
  • Average UV index in October: 4

The month with the highest UV index is June (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
Vallejo, CA

Average cloud cover in October - Vallejo, CA
  • Average cloud cover in October: 17

The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 9).

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Average visibility in October
Vallejo, CA

Average visibility in October - Vallejo, 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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