Sunnyvale weather in October: Sunnyvale, California: normal highs, lows, rain and records for October
Sunnyvale in October has a normal high of 74°F and a normal low of 53°F, a daily mean of 64°F, falling from 77°F on the 1st to 71°F by the 31st. Measurable precipitation falls on 4 days in a normal October, 0.56 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 23°C and low of 12°C, 14 mm of precipitation in October.
- NOAA stationMoffett Federal Airfield
- Station IDUSW00023244
- Location37.41°N 122.05°W
- Elevation39 ft (12 m)
- From the center2 miles
- Population156,792
- Jan 59° 42°
- Feb 62° 45°
- Mar 65° 47°
- Apr 68° 49°
- May 72° 53°
- Jun 76° 56°
- Jul 77° 59°
- Aug 77° 59°
- Sep 78° 57°
- Oct 74° 53°
- Nov 66° 46°
- Dec 59° 42°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Sunnyvale in October?
The normal high is 74°F and the normal low 53°F, for a daily mean of 63.6°F. October is 3.9°F cooler than September and 7.7°F warmer than November. October is the 5th warmest month of the year in Sunnyvale and the 7th wettest. Across the month the normal high falls 6°F, from 77°F on October 1 to 71°F on October 31. From one year to the next October's mean temperature typically moves about 1.8°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 62°F and 65°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 21%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 77°F | 56°F | 7% | 2% |
| October 8 | 76°F | 55°F | 9% | 3% |
| October 15 | 75°F | 54°F | 13% | 5% |
| October 22 | 73°F | 52°F | 16% | 6% |
| October 31 | 71°F | 50°F | 21% | 8% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 77°F | 56°F | 7% | 2% | 11 h 50 min |
| October 2 | 77°F | 56°F | 7% | 2% | 11 h 50 min |
| October 3 | 76°F | 56°F | 7% | 3% | 11 h 50 min |
| October 4 | 76°F | 55°F | 8% | 3% | 11 h 40 min |
| October 5 | 76°F | 55°F | 8% | 3% | 11 h 40 min |
| October 6 | 76°F | 55°F | 8% | 3% | 11 h 40 min |
| October 7 | 76°F | 55°F | 9% | 3% | 11 h 40 min |
| October 8 | 76°F | 55°F | 9% | 3% | 11 h 30 min |
| October 9 | 76°F | 55°F | 10% | 4% | 11 h 30 min |
| October 10 | 75°F | 54°F | 10% | 4% | 11 h 30 min |
| October 11 | 75°F | 54°F | 11% | 4% | 11 h 30 min |
| October 12 | 75°F | 54°F | 11% | 4% | 11 h 20 min |
| October 13 | 75°F | 54°F | 11% | 4% | 11 h 20 min |
| October 14 | 75°F | 54°F | 12% | 4% | 11 h 20 min |
| October 15 | 75°F | 54°F | 13% | 5% | 11 h 20 min |
| October 16 | 74°F | 53°F | 13% | 5% | 11 h 20 min |
| October 17 | 74°F | 53°F | 14% | 5% | 11 h 10 min |
| October 18 | 74°F | 53°F | 14% | 5% | 11 h 10 min |
| October 19 | 74°F | 53°F | 15% | 5% | 11 h 10 min |
| October 20 | 74°F | 52°F | 15% | 6% | 11 h 10 min |
| October 21 | 73°F | 52°F | 16% | 6% | 11 h |
| October 22 | 73°F | 52°F | 16% | 6% | 11 h |
| October 23 | 73°F | 52°F | 17% | 6% | 11 h |
| October 24 | 73°F | 52°F | 17% | 6% | 11 h |
| October 25 | 72°F | 51°F | 18% | 7% | 10 h 50 min |
| October 26 | 72°F | 51°F | 18% | 7% | 10 h 50 min |
| October 27 | 72°F | 51°F | 19% | 7% | 10 h 50 min |
| October 28 | 72°F | 51°F | 20% | 7% | 10 h 50 min |
| October 29 | 71°F | 50°F | 20% | 7% | 10 h 50 min |
| October 30 | 71°F | 50°F | 21% | 8% | 10 h 40 min |
| October 31 | 71°F | 50°F | 21% | 8% | 10 h 40 min |
- Normal high
- 74°FOctober average
- Normal low
- 53°FOctober average
- Precipitation
- 0.56 inmonth total
- Days with precipitation
- 40.01 inch or more
- Days at 90°F or more
- 1
- Daylight
- 11 h 50 min to 10 h 40 minOctober 1 to October 31
- Days at 70°F or more
- 22
- Days at 80°F or more
- 7
- Sunshine
- 83%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00023244; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Sunnyvale in October?
On a given October day the chance of 0.01 inch or more is 13% on average, highest around October 31 (21%). In all, 0.56 in falls on 4 days of a normal October.
In a normal October in Sunnyvale, 1 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00023244.
What are the records for October in Sunnyvale?
The warmest October temperature on this station's record (since 1945) is 100°F, on October 5, 1987; the coldest is 33°F, on October 30, 1946. The wettest October brought 3.52 in (1962).
The October mean against the 1991-2020 normal of 63.6°F: 2025 64.0°F (+0.4). 1 of 1 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2025 | 64.0°F | +0.4°F | – |
Source: records: ACIS, station USW00023244; recent months: ACIS, station USW00023244. Records and recent months use complete months only.
How does October in Sunnyvale compare across California?
Across the 219 places PlainClimate covers in California, October normal highs run from 58°F in Tahoma to 93°F in Brawley; Sunnyvale's is 74°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Sunnyvale in September78°F by day, 57°F at night
- Sunnyvale in November66°F by day, 46°F at night
- Sunnyvale through the yearEvery month, frost dates, records and recent years
- California in OctoberThe statewide normal and the warmest and coolest places
- Brawley: California's warmest Octobernormal high 93°F