October weather forecastRiverdale, CA
October
Weather in October
October, like September, in Riverdale, California, is a moderately hot autumn month, with an average temperature ranging between max 80.4°F (26.9°C) and min 56.5°F (13.6°C).Temperature
October is characterized by a reduction in the average high-temperature, from a hot 94.1°F (34.5°C) in September to a moderately hot 80.4°F (26.9°C). October nights are characterized by a significant departure from the daytime highs, dropping to an average temperature of 56.5°F (13.6°C).Humidity
The average relative humidity in October is 43%.Rainfall
In Riverdale, during October, the rain falls for 3.4 days and regularly aggregates up to 0.47" (12mm) of precipitation. In Riverdale, during the entire year, the rain falls for 58.2 days and collects up to 9.29" (236mm) of precipitation.Daylight
The average length of the day in October in Riverdale, California, is 11h and 14min.On the first day of the month, sunrise is at 6:55 am and sunset at 6:42 pm. On the last day of October, sunrise is at 7:22 am and sunset at 6:03 pm PDT.
Sunshine
In October, the average sunshine is 7.9h.UV index
In Riverdale, the average daily maximum UV index in October is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: A maximum daily UV index of 5 during October morphs into the following directions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Riverdale, CA
- Average high temperature in October: 80.4°F
The warmest month (with the highest average high temperature) is July (102.2°F).
The month with the lowest average high temperature is December (57.2°F).
- Average low temperature in October: 56.5°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is December (43°F).
Average pressure in October
Riverdale, CA
- Average pressure in October: 29.98"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in October
Riverdale, CA
- Average wind speed in October: 5.4mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and November (4.8mph).
Average humidity in October
Riverdale, CA
- Average humidity in October: 43%
The months with the highest relative humidity are January and December (66%).
The month with the lowest relative humidity is July (30%).
Average rainfall in October
Riverdale, CA
- Average rainfall in October: 0.47"
The wettest months (with the highest rainfall) are January, February and March (1.54").
The driest month (with the least rainfall) is August (0.08").
Average rainfall days in October
Riverdale, CA
- Average rainfall days in October: 3.4 days
The month with the highest number of rainy days is March (9.6 days).
The month with the least rainy days is August (0.8 days).
Average daylight in October /
Average sunshine in October
Riverdale, CA
- Average daylight in October: 11h and 12min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in October: 7h and 54min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days in October
Riverdale, CA
- Average sunshine days in October: 27 days
The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is February (19.4 days).
Average UV index in October
Riverdale, CA
- Average UV index in October: 5
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover in October
Riverdale, CA
- Average cloud cover in October: 11
The months with the most cloud cover are March and December (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in October
Riverdale, 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).
