October weather forecastPetaluma, CA
October
Weather in October
October, like September, is another pleasant autumn month in Petaluma, California, with an average temperature varying between 71.2°F (21.8°C) and 52.7°F (11.5°C).Temperature
In Petaluma, the average high-temperature in October slightly decreases from a moderately hot 77.2°F (25.1°C) in September to a pleasant 71.2°F (21.8°C). During October nights, Petaluma records an average temperature of 52.7°F (11.5°C).Humidity
The months with the lowest humidity in Petaluma are September and October, with an average relative humidity of 65%.Rainfall
In October, in Petaluma, the rain falls for 4.4 days. Throughout October, 0.75" (19mm) of precipitation is accumulated. In Petaluma, during the entire year, the rain falls for 71.1 days and collects up to 15.24" (387mm) of precipitation.Daylight
In October, the average length of the day is 11h and 11min.On the first day of the month, sunrise is at 7:07 am and sunset at 6:52 pm. On the last day of October, in Petaluma, sunrise is at 7:36 am and sunset at 6:11 pm PDT.
Sunshine
The average sunshine in October in Petaluma is 7h.UV index
In October, the average daily maximum UV index in Petaluma, California, is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A daily high UV index of 4 in October leads to these guidelines:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Petaluma, CA
- Average high temperature in October: 71.2°F
The warmest month (with the highest average high temperature) is August (77.9°F).
The month with the lowest average high temperature is December (55.2°F).
- Average low temperature in October: 52.7°F
The month with the highest average low temperature is September (55.2°F).
The coldest month (with the lowest average low temperature) is December (43.2°F).
Average pressure in October
Petaluma, CA
- Average pressure in October: 29.98"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in October
Petaluma, CA
- Average wind speed in October: 5.1mph
The windiest months (with the highest average wind speed) are April and May (7mph).
The calmest month (with the lowest average wind speed) is November (5mph).
Average humidity in October
Petaluma, CA
- Average humidity in October: 65%
The month with the highest relative humidity is March (77%).
The months with the lowest relative humidity are September and October (65%).
Average rainfall in October
Petaluma, CA
- Average rainfall in October: 0.75"
The wettest month (with the highest rainfall) is February (3.5").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in October
Petaluma, 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 July (1 days).
Average daylight in October /
Average sunshine in October
Petaluma, CA
- Average daylight in October: 11h and 12min
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 0min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in October
Petaluma, CA
- Average sunshine days in October: 25.4 days
The month with the most sunshine days is July (28.4 days).
The month with the least sunshine days is March (17.2 days).
Average UV index in October
Petaluma, CA
- Average UV index in October: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in October
Petaluma, CA
- Average cloud cover in October: 18
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in October
Petaluma, 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).
