Sunnyvale Weather in October
Average highs run from 77°F on October 1 to 71°F on October 31, and lows from 56°F to 50°F. Normal precipitation for the month is 0.56 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
- 74°F
- Average low
- 53°F
- Precipitation
- 0.56 in
- Record high
- 100°FOct 5, 1987
- Record low
- 33°FOct 20, 1949
- Chance of a freeze
- 0%
- Days of 90°F or more
- 1.0
- Daylight
- 11 h 47 min to 10 h 39 min
- Cloud cover
- 26%
- Humidity
- 63%
- Dew point
- 45°F
- Wind
- 6.5 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Oct 1 | 77°F | 56°F | 93°F 1980 | 40°F 1971 | 7% |
| Oct 2 | 77°F | 56°F | 95°F 2012 | 41°F 1950 | 7% |
| Oct 3 | 76°F | 56°F | 97°F 1985 | 43°F 1950 | 7% |
| Oct 4 | 76°F | 55°F | 94°F 1987 | 43°F 1955 | 8% |
| Oct 5 | 76°F | 55°F | 100°F 1987 | 44°F 1946 | 8% |
| Oct 6 | 76°F | 55°F | 93°F 1976 | 43°F 2007 | 8% |
| Oct 7 | 76°F | 55°F | 91°F 1992 | 45°F 1946 | 9% |
| Oct 8 | 76°F | 55°F | 88°F 2016 | 42°F 1975 | 9% |
| Oct 9 | 76°F | 55°F | 92°F 1992 | 45°F 1949 | 10% |
| Oct 10 | 75°F | 54°F | 95°F 1991 | 45°F 1948 | 10% |
| Oct 11 | 75°F | 54°F | 87°F 1946 | 46°F 1998 | 11% |
| Oct 12 | 75°F | 54°F | 93°F 1978 | 44°F 1956 | 11% |
| Oct 13 | 75°F | 54°F | 95°F 1978 | 45°F 1956 | 11% |
| Oct 14 | 75°F | 54°F | 90°F 2001 | 44°F 1956 | 12% |
| Oct 15 | 75°F | 54°F | 90°F 1961 | 40°F 1966 | 13% |
| Oct 16 | 74°F | 53°F | 92°F 1988 | 44°F 1946 | 13% |
| Oct 17 | 74°F | 53°F | 93°F 1988 | 42°F 1946 | 14% |
| Oct 18 | 74°F | 53°F | 89°F 2012 | 39°F 1949 | 14% |
| Oct 19 | 74°F | 53°F | 86°F 1964 | 37°F 1949 | 15% |
| Oct 20 | 74°F | 52°F | 92°F 1991 | 33°F 1949 | 15% |
| Oct 21 | 73°F | 52°F | 84°F 2006 | 37°F 1949 | 16% |
| Oct 22 | 73°F | 52°F | 86°F 2011 | 38°F 1949 | 16% |
| Oct 23 | 73°F | 52°F | 89°F 1959 | 39°F 1949 | 17% |
| Oct 24 | 73°F | 52°F | 92°F 2017 | 41°F 1945 | 17% |
| Oct 25 | 72°F | 51°F | 90°F 2003 | 40°F 1954 | 18% |
| Oct 26 | 72°F | 51°F | 91°F 2003 | 41°F 1945 | 18% |
| Oct 27 | 72°F | 51°F | 88°F 2003 | 41°F 1948 | 19% |
| Oct 28 | 72°F | 51°F | 88°F 2003 | 33°F 1946 | 20% |
| Oct 29 | 71°F | 50°F | 86°F 1993 | 33°F 1946 | 20% |
| Oct 30 | 71°F | 50°F | 83°F 1967 | 33°F 1946 | 21% |
| Oct 31 | 71°F | 50°F | 85°F 1966 | 41°F 1961 | 21% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- October 1
- sunrise 7:04 AM, sunset 6:51 PM
- October 31
- sunrise 7:32 AM, sunset 6:11 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00023244 (Moffett Federal Airfield), public domain. Records: NOAA GHCN-Daily, station USW00023244, 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.