Grass Valley Weather in October
Average highs run from 78°F on October 1 to 66°F on October 31, and lows from 48°F to 40°F. Normal precipitation for the month is 2.56 in over about 4 wet days.
October day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
October at a glance
- Average high
- 72°F
- Average low
- 44°F
- Precipitation
- 2.56 in
- Record high
- 99°FOct 7, 1917
- Record low
- 16°FOct 30, 1919
- Chance of a freeze
- 18%
- Days of 90°F or more
- 0.7
- Daylight
- 11 h 47 min to 10 h 33 min
- Cloud cover
- 36%
- Humidity
- 43%
- Dew point
- 37°F
- Wind
- 5.8 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Oct 1 | 78°F | 48°F | 94°F 2020 | 27°F 1950 | 9% | 0% |
| Oct 2 | 78°F | 48°F | 97°F 2024 | 28°F 1911 | 10% | 0% |
| Oct 3 | 77°F | 48°F | 98°F 1933 | 21°F 2017 | 10% | 0% |
| Oct 4 | 77°F | 48°F | 97°F 1933 | 29°F 1916 | 10% | 0% |
| Oct 5 | 76°F | 47°F | 97°F 1933 | 25°F 1927 | 11% | 0% |
| Oct 6 | 76°F | 47°F | 95°F 1933 | 28°F 1913 | 11% | 0% |
| Oct 7 | 76°F | 47°F | 99°F 1917 | 27°F 1941 | 11% | 0% |
| Oct 8 | 75°F | 46°F | 96°F 1910 | 27°F 1941 | 12% | 0% |
| Oct 9 | 75°F | 46°F | 95°F 1917 | 27°F 1949 | 12% | 0% |
| Oct 10 | 75°F | 46°F | 94°F 1934 | 27°F 1912 | 12% | 0% |
| Oct 11 | 74°F | 46°F | 92°F 1991 | 25°F 1924 | 12% | 0% |
| Oct 12 | 74°F | 45°F | 96°F 1934 | 27°F 1924 | 13% | 0% |
| Oct 13 | 73°F | 45°F | 91°F 1914 | 23°F 1928 | 13% | 0% |
| Oct 14 | 73°F | 45°F | 93°F 1914 | 27°F 1960 | 14% | 0% |
| Oct 15 | 73°F | 44°F | 90°F 1911 | 26°F 1966 | 14% | 0% |
| Oct 16 | 72°F | 44°F | 90°F 1911 | 27°F 1938 | 14% | 0% |
| Oct 17 | 72°F | 44°F | 91°F 1903 | 27°F 1904 | 15% | 0% |
| Oct 18 | 71°F | 44°F | 93°F 1911 | 26°F 1932 | 15% | 0% |
| Oct 19 | 71°F | 43°F | 92°F 1913 | 25°F 1949 | 15% | 0% |
| Oct 20 | 71°F | 43°F | 90°F 1913 | 25°F 1908 | 16% | 0% |
| Oct 21 | 70°F | 43°F | 89°F 1929 | 23°F 1935 | 16% | 0% |
| Oct 22 | 70°F | 43°F | 94°F 1903 | 25°F 1935 | 17% | 0% |
| Oct 23 | 69°F | 42°F | 88°F 1913 | 21°F 1975 | 17% | 0% |
| Oct 24 | 69°F | 42°F | 88°F 1910 | 22°F 1975 | 17% | 0% |
| Oct 25 | 69°F | 42°F | 91°F 1917 | 23°F 1918 | 18% | 0% |
| Oct 26 | 68°F | 42°F | 88°F 1913 | 23°F 1930 | 18% | 0% |
| Oct 27 | 68°F | 41°F | 91°F 1906 | 19°F 1919 | 19% | 0% |
| Oct 28 | 67°F | 41°F | 87°F 1915 | 22°F 1919 | 19% | 0% |
| Oct 29 | 67°F | 41°F | 89°F 1936 | 20°F 1971 | 20% | 0% |
| Oct 30 | 67°F | 41°F | 88°F 1921 | 16°F 1919 | 20% | 0% |
| Oct 31 | 66°F | 40°F | 83°F 1930 | 17°F 1919 | 21% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- October 1
- sunrise 7:00 AM, sunset 6:47 PM
- October 31
- sunrise 7:31 AM, sunset 6:04 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00043573 (Grass Valley #2), public domain. Records: NOAA GHCN-Daily, station USC00046136, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.