October weather forecastGrass Valley, CA
October
Weather in October
October, like September, is an agreeable autumn month in Grass Valley, California, with an average temperature varying between 50.7°F (10.4°C) and 72°F (22.2°C).Temperature
October weather is marked by a drop in the average high-temperature, falling from a warm 83.8°F (28.8°C) in September to a pleasant 72°F (22.2°C). During October, Grass Valley records an average temperature of 50.7°F (10.4°C) at night.Humidity
The average relative humidity in October is 46%.Rainfall
In Grass Valley, in October, it is raining for 4.1 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, in Grass Valley, there are 82 rainfall days, and 33.11" (841mm) of precipitation is accumulated.Snowfall
In Grass Valley, California, snow does not fall in June through October.Daylight
The average length of the day in October in Grass Valley is 11h and 9min.On the first day of the month, sunrise is at 7:01 am and sunset at 6:46 pm. On the last day of October, in Grass Valley, sunrise is at 7:31 am and sunset at 6:03 pm PDT.
Sunshine
In Grass Valley, the average sunshine in October is 7.1h.UV index
In October, the average daily maximum UV index in Grass Valley is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In October, the maximum UV index of 4 translates into these guidelines:
Put precautions into practice - Protective measures against sun-induced damage are advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Grass Valley, CA
- Average high temperature in October: 72°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is December (51.3°F).
- Average low temperature in October: 50.7°F
The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).
Average pressure in October
Grass Valley, CA
- Average pressure in October: 30"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in October
Grass Valley, CA
- Average wind speed in October: 5.4mph
The windiest month (with the highest average wind speed) is February (6mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in October
Grass Valley, CA
- Average humidity in October: 46%
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is July (37%).
Average rainfall in October
Grass Valley, CA
- Average rainfall in October: 1.57"
The wettest month (with the highest rainfall) is March (6.57").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in October
Grass Valley, CA
- Average rainfall days in October: 4.1 days
The month with the highest number of rainy days is March (15.1 days).
The month with the least rainy days is July (1.1 days).
Average snowfall in October
Grass Valley, CA
- Average snowfall in October: 0"
The month with the highest snowfall is February (6.42").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in October
Grass Valley, CA
- Average snowfall days in October: 0 days
The month with the highest number of snowfall days is March (2.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in October /
Average sunshine in October
Grass Valley, CA
- Average daylight in October: 11h and 12min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in October: 7h and 6min
The month with the most sunshine is July (Average sunshine: 12h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in October
Grass Valley, CA
- Average sunshine days in October: 26.3 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is March (14.8 days).
Average UV index in October
Grass Valley, CA
- Average UV index in October: 4
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is November (UV index 2).
Average cloud cover in October
Grass Valley, CA
- Average cloud cover in October: 16
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in October
Grass Valley, 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).
