October weather forecastRichmond, CA
October
Weather in October
October, the same as September, in Richmond, California, is an agreeable autumn month, with an average temperature fluctuating between 70.3°F (21.3°C) and 54.7°F (12.6°C).Temperature
In Richmond, entering October brings a subtle temperature decrement, reducing from September's moderately hot 75.7°F (24.3°C) to a pleasant 70.3°F (21.3°C). An average low-temperature of 54.7°F (12.6°C) is expected in Richmond, California, during October.Humidity
With an average relative humidity of 65%, October is the least humid month.Rainfall
In Richmond, in October, during 3.9 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. In Richmond, during the entire year, the rain falls for 64.5 days and collects up to 5.98" (152mm) of precipitation.Ocean temperature
In Richmond, California, the average seawater temperature in October is 57°F (13.9°C).Note: Swimming in 57°F (13.9°C) poses a severe threat. Even short exposure to 55.4°F (13°C) is chilling, and going below 50°F (10°C) can cause breathing irregularities and intense cold shock, based on one's stamina.
Daylight
In October, the average length of the day is 11h and 12min.On the first day of the month, sunrise is at 7:05 am and sunset at 6:51 pm. On the last day of October, in Richmond, sunrise is at 7:34 am and sunset at 6:11 pm PDT.
Sunshine
In October, the average sunshine in Richmond is 7h.UV index
In Richmond, the average daily maximum UV index in October is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 4 in October translates into the following instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Direct Sun exposure should be minimized especially during midday when radiation is most intense. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Richmond, CA
- Average high temperature in October: 70.3°F
The warmest month (with the highest average high temperature) is September (75.7°F).
The month with the lowest average high temperature is December (55.6°F).
- Average low temperature in October: 54.7°F
The month with the highest average low temperature is September (56.5°F).
The coldest month (with the lowest average low temperature) is January (44.8°F).
Average pressure in October
Richmond, 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
Richmond, CA
- Average wind speed in October: 5.3mph
The windiest month (with the highest average wind speed) is May (7.5mph).
The calmest month (with the lowest average wind speed) is November (5.1mph).
Average humidity in October
Richmond, CA
- Average humidity in October: 65%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is October (65%).
Average rainfall in October
Richmond, CA
- Average rainfall in October: 0.28"
The wettest month (with the highest rainfall) is February (1.38").
The driest months (with the least rainfall) are June, July, August and September (0.08").
Average rainfall days in October
Richmond, CA
- Average rainfall days in October: 3.9 days
The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is June (2 days).
Average sea temperature in October
Richmond, CA
- Average sea temperature in October: 56.9°F
The best month for swimming (with the highest average sea temperature) is September (57.3°F).
The coldest months (with the lowest average sea temperature) are April and June (53°F).
Average daylight in October /
Average sunshine in October
Richmond, 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 48min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in October
Richmond, CA
- Average sunshine days in October: 24.6 days
The month with the most sunshine days is July (24.9 days).
The month with the least sunshine days is March (18.4 days).
Average UV index in October
Richmond, CA
- Average UV index in October: 4
The months with the highest UV index are April, May, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in October
Richmond, CA
- Average cloud cover in October: 18
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 14).
Average visibility in October
Richmond, 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).
