October weather forecast
Livermore, CA

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A path in the scenic hilly and forest landscape of the famous Lake Del Valle Regional Park in Livermore, California
A path in the scenic hilly and forest landscape of the famous Lake Del Valle Regional Park in Livermore, California

Weather in October

October, the same as September, is a moderately hot autumn month in Livermore, California, with an average temperature fluctuating between 74.3°F (23.5°C) and 52.5°F (11.4°C).

Temperature

October signifies a minor drop in average high-temperature, transitioning from a moderately hot 82.9°F (28.3°C) in September to a still warm 74.3°F (23.5°C). With a notable disparity from daily peak temperatures, the average low-temperature settles at a cool 52.5°F (11.4°C) throughout October.

Humidity

In October, the average relative humidity is 57%.

Rainfall

In October, the rain falls for 4.5 days. Throughout October, 0.55" (14mm) of precipitation is accumulated. In Livermore, during the entire year, the rain falls for 70.6 days and collects up to 11.3" (287mm) of precipitation.

Daylight

In Livermore, the average length of the day in October is 11h and 12min.
On the first day of October, sunrise is at 7:03 am and sunset at 6:49 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 6:09 pm PDT.

Sunshine

In October, the average sunshine in Livermore is 7.2h.

UV index

The average daily maximum UV index in October is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index of 4 in October interprets into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. To guard against the harmful effects of the Sun, minimize exposure during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
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Frequently asked questions

What are October temperatures in Livermore?

In October, the average high-temperature and low-temperature in Livermore, California, are 74.3°F (23.5°C) and 52.5°F (11.4°C) respectively. The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in September is appraised at 84.2°F (29°C).

What is the average humidity in October in Livermore?

In October, the average relative humidity in Livermore, California, is 57%.

How many days does it rain in October in Livermore?

In Livermore, California, during October, the rain falls for 4.5 days and regularly aggregates up to 0.55" (14mm) of precipitation.

How many hours of daylight does Livermore have in October?

In Livermore, the average day length in October is 11h and 12min.

When are sunrise and sunset in October in Livermore?

On the first day of October in Livermore, California, sunrise is at 7:03 am and sunset at 6:49 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 6:09 pm PDT.

How long on average sun shines in October in Livermore?

The average sunshine duration in October in Livermore is 7.2h.

What is the UV index reading in October in Livermore?

The average daily maximum UV index in October in Livermore is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Livermore, CA

Average temperature in October - Livermore, CA
  • Average high temperature in October: 74.3°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is December (54.9°F).

  • Average low temperature in October: 52.5°F

The month with the highest average low temperature is August (56.7°F).
The coldest month (with the lowest average low temperature) is January (41.4°F).

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Average pressure in October
Livermore, CA

Average pressure in October - Livermore, CA
  • Average pressure in October: 29.98"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

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Average wind speed in October
Livermore, CA

Average wind speed in October - Livermore, CA
  • Average wind speed in October: 4.5mph

The windiest months (with the highest average wind speed) are May and June (6.5mph).
The calmest month (with the lowest average wind speed) is November (4.2mph).

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Average humidity in October
Livermore, CA

Average humidity in October - Livermore, CA
  • Average humidity in October: 57%

The month with the highest relative humidity is March (74%).
The months with the lowest relative humidity are July and September (55%).

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Average rainfall in October
Livermore, CA

Average rainfall in October - Livermore, CA
  • Average rainfall in October: 0.55"

The wettest month (with the highest rainfall) is February (2.09").
The driest month (with the least rainfall) is August (0.04").

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Average rainfall days in October
Livermore, CA

Average rainfall days in October - Livermore, CA
  • Average rainfall days in October: 4.5 days

The month with the highest number of rainy days is March (12.7 days).
The month with the least rainy days is August (1.3 days).

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

Average daylight in October / Average sunshine in October - Livermore, CA
  • Average daylight in October: 11h and 1min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in October: 7h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in October
Livermore, CA

Average sunshine days in October - Livermore, CA
  • Average sunshine days in October: 25.3 days

The month with the most sunshine days is August (28.8 days).
The month with the least sunshine days is March (17.6 days).

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Average UV index in October
Livermore, CA

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

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

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Average cloud cover in October
Livermore, CA

Average cloud cover in October - Livermore, CA
  • Average cloud cover in October: 15

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 5).

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Average visibility in October
Livermore, CA

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

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

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Livermore, California, USA

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