October weather forecast
Rio Vista, CA

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Weather in October

October, the same as September, is another warm autumn month in Rio Vista, California, with an average temperature fluctuating between 54.1°F (12.3°C) and 76.5°F (24.7°C).

Temperature

The average high-temperature drops in October, from September's hot 86.9°F (30.5°C) to a warm 76.5°F (24.7°C). Rio Vista experiences a significant downturn from peak daytime temperatures throughout October, with the average low-temperature dipping to a cool 54.1°F (12.3°C).

Humidity

The average relative humidity in October is 53%.

Rainfall

In Rio Vista, during October, the rain falls for 4.2 days and regularly aggregates up to 0.59" (15mm) of precipitation. Throughout the year, in Rio Vista, there are 68.7 rainfall days, and 11.18" (284mm) of precipitation is accumulated.

Daylight

The average length of the day in October is 11h and 11min.
On the first day of the month, sunrise is at 7:03 am and sunset at 6:49 pm. On the last day of October, sunrise is at 7:32 am and sunset at 6:08 pm PDT.

Sunshine

In October, the average sunshine in Rio Vista is 7.2h.

UV index

The average daily maximum UV index in October is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 4 during October translates into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
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Frequently asked questions

What is the average October temperature in Rio Vista?

In Rio Vista, 76.5°F (24.7°C) is the average high-temperature and 54.1°F (12.3°C) is the average low-temperature during October. In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 89.6°F (32°C).

What is the average humidity in October in Rio Vista?

The average relative humidity in October in Rio Vista is 53%.

How much does it rain in Rio Vista in October?

In Rio Vista, in October, during 4.2 rainfall days, 0.59" (15mm) of precipitation is typically accumulated.

What is the average length of the day in October in Rio Vista?

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

When is the sunrise / sunset in October in Rio Vista?

On the first day of October in Rio Vista, 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 6:08 pm PDT.

How long on average sun shines in October in Rio Vista?

In October, the average sunshine duration in Rio Vista, California, is 7.2h.

What is the UV index intensity in October in Rio Vista?

The average daily maximum UV index in October in Rio Vista is 4. A UV Index estimate of 3 to 5 represents a medium health risk 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
Rio Vista, CA

Average temperature in October - Rio Vista, CA
  • Average high temperature in October: 76.5°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (55°F).

  • Average low temperature in October: 54.1°F

The month with the highest average low temperature is September (58.1°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).

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Average pressure in October
Rio Vista, CA

Average pressure in October - Rio Vista, CA
  • Average pressure in October: 29.99"Hg

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

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Average wind speed in October
Rio Vista, CA

Average wind speed in October - Rio Vista, CA
  • Average wind speed in October: 5.7mph

The windiest month (with the highest average wind speed) is June (7.6mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).

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Average humidity in October
Rio Vista, CA

Average humidity in October - Rio Vista, CA
  • Average humidity in October: 53%

The months with the highest relative humidity are January and March (74%).
The month with the lowest relative humidity is September (49%).

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Average rainfall in October
Rio Vista, CA

Average rainfall in October - Rio Vista, CA
  • Average rainfall in October: 0.59"

The wettest month (with the highest rainfall) is February (2.17").
The driest month (with the least rainfall) is August (0").

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Average rainfall days in October
Rio Vista, CA

Average rainfall days in October - Rio Vista, CA
  • Average rainfall days in October: 4.2 days

The month with the highest number of rainy days is March (13 days).
The month with the least rainy days is August (0.7 days).

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Average daylight in October /
Average sunshine in October
Rio Vista, CA

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

The month with the longest days is June (Average daylight: 14h and 48min).
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: 5h and 54min).

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Average sunshine days in October
Rio Vista, CA

Average sunshine days in October - Rio Vista, CA
  • Average sunshine days in October: 25.9 days

The month with the most sunshine days is August (29.9 days).
The month with the least sunshine days is March (17.3 days).

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Average UV index in October
Rio Vista, CA

Average UV index in October - Rio Vista, 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
Rio Vista, CA

Average cloud cover in October - Rio Vista, CA
  • Average cloud cover in October: 14

The months with the most cloud cover are March and December (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 4).

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Average visibility in October
Rio Vista, CA

Average visibility in October - Rio Vista, 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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Rio Vista, California, USA

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