October weather forecast and climate
Fullerton, CA

Trees and neat lawns of the famous Muckenthaler Community Center in Fullerton, California
Trees and neat lawns of the famous Muckenthaler Community Center in Fullerton, California

Weather in October

October, like September, in Fullerton, California, is another warm autumn month, with average temperature fluctuating between 77.5°F (25.3°C) and 61.5°F (16.4°C).

Temperature

In Fullerton, California, the average high-temperature is relatively the same as in September - a still warm 77.5°F (25.3°C). The average low-temperature, in October, is 61.5°F (16.4°C).

Humidity

In October, the average relative humidity is 56%.

Rainfall

In Fullerton, during 3.5 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. In Fullerton, during the entire year, the rain falls for 52.5 days and collects up to 7.09" (180mm) of precipitation.

Daylight

In October, the average length of the day is 11.3h.

Sunshine

The average sunshine is 8.5h.

UV index

The average daily maximum UV index in Fullerton, California, is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 5 in October interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. 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 Fullerton?

The average high-temperature, in October, in Fullerton, is 77.5°F (25.3°C), while the average low-temperature is 61.5°F (16.4°C).

What is the average humidity in October in Fullerton?

In October, the average relative humidity in Fullerton is 56%.

How much does it rain in Fullerton in October?

In October, in Fullerton, the rain falls for 3.5 days. Throughout October, 0.28" (7mm) of precipitation is accumulated.

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

In Fullerton, California, the average length of the day in October is 11.3h.

How long on average sun shines in October in Fullerton?

The average sunshine in October in Fullerton, California, is 8.5h.

How high is the UV index in October in Fullerton?

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

Average temperature in October
Fullerton, CA

Average temperature in October - Fullerton, CA
  • Average high temperature in October: 77.5°F

The warmest month (with the highest average high temperature) is August (83.5°F).
The month with the lowest average high temperature is December (64°F).

  • Average low temperature in October: 61.5°F

The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is February (50.2°F).

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Average pressure in October
Fullerton, CA

Average pressure in October - Fullerton, CA
  • Average pressure in October: 29.95"

The month with the highest atmospheric pressure is January (30.1").
The month with the lowest atmospheric pressure is June (29.88").

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Average wind speed in October
Fullerton, CA

Average wind speed in October - Fullerton, CA
  • Average wind speed in October: 4.7mph

The windiest month (with the highest average wind speed) is April (6mph).
The calmest months (with the lowest average wind speed) are September and October (4.7mph).

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Average humidity in October
Fullerton, CA

Average humidity in October - Fullerton, CA
  • Average humidity in October: 56%

The month with the highest relative humidity is June (65%).
The month with the lowest relative humidity is November (51%).

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Average rainfall in October
Fullerton, CA

Average rainfall in October - Fullerton, CA
  • Average rainfall in October: 0.28"

The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.04").

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Average rainfall days in October
Fullerton, CA

Average rainfall days in October - Fullerton, CA
  • Average rainfall days in October: 3.5 days

The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is June (1.5 days).

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

Average daylight in October / Average sunshine in October - Fullerton, CA
  • Average daylight in October: 11.3h

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in October: 8.5h

Months with the most sunshine are July and August (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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Average sunshine days in October
Fullerton, CA

Average sunshine days in October - Fullerton, CA
  • Average sunshine days in October: 24.6 days

The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is February (20.6 days).

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Average UV index in October
Fullerton, CA

Average UV index in October - Fullerton, CA
  • Average UV index in October: 5

Months with the highest UV index are June, July, August and September (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 4).

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Average cloud cover in October
Fullerton, CA

Average cloud cover in October - Fullerton, CA
  • Average cloud cover in October: 12

Months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).

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Average visibility in October
Fullerton, CA

Average visibility in October - Fullerton, 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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