Climate averages 1991–2020
San Jose weather
in October.
A warm, fairly dry month: the 5th warmest and the 6th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
October is a warm month in San Jose: daytime highs average 24.1°C and nights cool to about 13.4°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 30 mm of rain on roughly 3 days, which makes October a fairly dry month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 16 min on an average October day.
The nearest other city in this atlas is Milpitas (10 km away). In October its highs average 24.1°C, about as warm as San Jose, with 23 mm of rain.
Among the 498 cities listed in the United States, San Jose ranks joint 195th of 498 for the warmest October highs and joint 122nd of 498 for the driest October (rainfall, lowest first). The mean October high of those 498 cities is 21.4°C; San Jose is 2.8°C warmer than that mean.
From October to November, average highs fall by 5.8°C to 18.3°C, and monthly rainfall rises from 30 mm to 62 mm.
The annual picture
October in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
San Jose climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 14.9°C6.2°C | 6.2°C | 129 | 9.1 | 9.910 h |
| February | 15.8°C7.1°C | 7.1°C | 135 | 9.5 | 10.811 h |
| March | 17.5°C8.3°C | 8.3°C | 100 | 9.3 | 11.912 h |
| April | 19.3°C9.1°C | 9.1°C | 46 | 5.6 | 13.113 h |
| May | 22.1°C10.9°C | 10.9°C | 22 | 3.4 | 14.214 h |
| June | 25.6°C12.9°C | 12.9°C | 3.9 | 1.0 | 14.715 h |
| July | 28.1°C14.9°C | 14.9°C | 0.8 | 0.1 | 14.514 h |
| August | 28.4°C15.4°C | 15.4°C | 1.0 | 0.2 | 13.614 h |
| September | 27.8°C15.6°C | 15.6°C | 2.5 | 0.5 | 12.512 h |
| October, selected | 24.1°C13.4°C | 13.4°C | 30 | 3.0 | 11.311 h |
| November | 18.3°C9.3°C | 9.3°C | 62 | 6.0 | 10.210 h |
| December | 14.5°C6.3°C | 6.3°C | 119 | 9.2 | 9.610 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
October in nearby cities
- Milpitas in OctoberUnited States · 10 kmHigh 24.1°C · Low 13.8°C · 23 mm rain
- Sunnyvale in OctoberUnited States · 13 kmHigh 23.3°C · Low 13.3°C · 30 mm rain
- Mountain View in OctoberUnited States · 17 kmHigh 23.0°C · Low 13.3°C · 23 mm rain
- Fremont in OctoberUnited States · 25 kmHigh 23.5°C · Low 13.4°C · 23 mm rain
- Union City in OctoberUnited States · 31 kmHigh 23.7°C · Low 13.1°C · 23 mm rain
- Redwood City in OctoberUnited States · 34 kmHigh 22.1°C · Low 13.1°C · 23 mm rain
- Pleasanton in OctoberUnited States · 36 kmHigh 23.9°C · Low 12.4°C · 21 mm rain
- Livermore in OctoberUnited States · 40 kmHigh 23.8°C · Low 12.1°C · 21 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for San Jose) is explained once on the San Jose year overview and on the Sources, method and limits page.
Sunnyvale lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.