San Jose weather in October
In October, San Jose has daytime highs averaging 25 °C, nights around 13 °C, with 2.9 wet days. Figures are 1991–2020 climate normals.
- 24.6°C Average high
- 13.5°C Average low
- 2.9days Wet days
- 29mm Rainfall
- 11h Daylight
Daily temperatures through October
How October develops
Averages for the first, middle and last part of the month, from daily 1991–2020 normals. Chance of rain is the share of years in which that calendar day recorded more than 1 mm.
| Days | Avg high | Avg low | Chance of rain |
|---|---|---|---|
| 1–10 October | 26.0 °C | 14.3 °C | 6 % |
| 11–20 October | 25.2 °C | 13.8 °C | 8 % |
| 21–31 October | 23.0 °C | 12.5 °C | 13 % |
- Average highs fall from 26.0 °C early in October to 23.0 °C by the end of it.
- Rain is most likely over days 21–31 of October (13 % of days) and least likely over days 1–10 (6 %).
What to expect
| Measure | Typical October | Share of the month |
|---|---|---|
| Days above 25 °C | 14 of 31 | 44 % |
| Days above 30 °C | 4.2 of 31 | 13 % |
| Days below 0 °C | 0 of 31 | 0 % |
| Days with more than 1 mm rain | 2.9 of 31 | 9 % |
Conditions in October
| Measure | Average |
|---|---|
| Mean temperature | 18 °C |
| Record high (1991–2020) | 39 °C |
| Record low (1991–2020) | 4.4 °C |
| Relative humidity | 63 % |
| Wind speed | 12 km/h |
| Cloud cover | 32 % |
Where San Jose ranks in October
| Ranking | Position | Value |
|---|---|---|
| Places with the best weather in North America in October | 4th of 50 | 96/100 |
| Places with the best weather in the world in October | 46th of 50 | 96/100 |
October compared with the months around it
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| August | 28.8 °C | 1 mm | 22 % |
| September | 28.4 °C | 3 mm | 22 % |
| October | 24.6 °C | 29 mm | 32 % |
| November | 18.6 °C | 59 mm | 48 % |
| December | 14.7 °C | 117 mm | 55 % |
See all twelve months for San Jose
- October is the 5th warmest month here.
- It is the 6th driest month of the year.
- It ranks 5th for least cloud cover.
- Days last about 11 hours from sunrise to sunset.
- It rains on 2.9 of 31 days — 9 % of the month.
- Nights are about 11 °C cooler than the middle of the day.
- The hottest October day on record since 1991 reached 39 °C, 15 °C above the usual daytime high.
QuestionsOctober in San Jose, answered
How warm is San Jose in October?
Daily highs average 25 °C and nights fall to about 13 °C, a spread of 11 °C between afternoon and dawn. That makes October the 5th warmest month of the year here.
Does it rain much in San Jose in October?
October averages 29 mm of rain, spread over about 3 of the 31 days — 9 % of the month. Cloud cover averages 32 % of the sky.
How long are the days in October?
San Jose averages 11 hours between sunrise and sunset in October. Day length is computed from latitude and date, so it is exact rather than modelled — but it says nothing about how much of that time is sunny.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: daylight hours, beach and comfort scores, monthly rankings, threshold day counts, chance of a wet day by date, ten-day averages within the month. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.