October is one of the warmer months of the year in San Bernardino, with average highs near 27.5°C and lows around 12.9°C (mean 20.2°C). It is one of the drier months, averaging 14 mm of rainfall and 45% relative humidity across the period.
October is one of the warmer months of the year in San Bernardino. Across 45 years of records, the warmest October in San Bernardino was 2024 — when the month averaged 23.8°C — while the coldest was 1981 at 17.1°C. Typical October days reach 27.5°C with nights near 12.9°C. The long-term trend is warming, about 0.5°C per decade.
October is one of the drier months in San Bernardino, averaging 14 mm of rainfall. The wettest October on record was 2004 with 130 mm, while the driest were 1988 and 2019 at 0 mm.
Relative humidity in San Bernardino during October averages 45%. The most humid October was 2000 at 60%, and the least humid was 2008 at 29%.
October receives about 4.9 kWh/m²/day of solar energy in San Bernardino. The sunniest Octobers were 1999 and 2019 at 5.3 kWh/m²/day, and the cloudiest were 1987 and 2010 at 4.3.
Average wind speed in San Bernardino during October is 1.7 m/s. The windiest October was 1981 at 2.1 m/s, while the calmest was 2022 at 1.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.2°C | 20.3°C | 19.7°C | 20.7°C | 21.5°C | +2.3°C |
| Avg High | 26.5°C | 27.8°C | 26.9°C | 28.1°C | 28.8°C | +2.3°C |
| Avg Low | 11.9°C | 12.8°C | 12.5°C | 13.4°C | 14.3°C | +2.4°C |
| Avg Rain | 17 mm | 10 mm | 21 mm | 12 mm | 10 mm | -7 mm |
October temperatures in San Bernardino have risen by about 2.6°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 3.6°C (1991) to a record high of 41.4°C (2024).
Rainfall in October is one of the drier months, averaging 14 mm, with a wettest year of 130 mm.
One of the best times to visit San Bernardino
October is one of the best times to visit San Bernardino. Expect days averaging 27.5°C and nights around 12.9°C (mean 20.2°C) — warmer than San Bernardino's yearly average — with low rainfall (14 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 27.6°C | 20.3°C | 13.0°C | 33.0°C | 7.4°C | 26 mm | 52% | 1.5 m/s | 4.9 |
| 2024 🔥 | 31.1°C | 23.8°C | 16.4°C | 41.4°C | 7.8°C | 1 mm | 36% | 1.4 m/s | 4.9 |
| 2023 | 28.9°C | 21.5°C | 14.1°C | 36.0°C | 7.6°C | 1 mm | 45% | 1.6 m/s | 5.1 |
| 2022 | 28.5°C | 21.6°C | 14.7°C | 33.9°C | 7.9°C | 10 mm | 50% | 1.3 m/s | 4.8 |
| 2021 | 25.6°C | 18.5°C | 11.5°C | 34.5°C | 5.1°C | 19 mm | 49% | 1.7 m/s | 4.8 |
| 2020 | 30.8°C | 23.3°C | 15.8°C | 39.8°C | 6.9°C | 0 mm | 37% | 1.5 m/s | 5 |
| 2019 | 28.5°C | 20.3°C | 12.1°C | 34.2°C | 6.2°C | 0 mm | 32% | 1.9 m/s | 5.3 |
| 2018 | 27.1°C | 20.2°C | 13.3°C | 32.7°C | 8.5°C | 19 mm | 49% | 1.7 m/s | 5 |
| 2017 | 30.3°C | 22.2°C | 14.0°C | 36.8°C | 8.1°C | 1 mm | 36% | 1.8 m/s | 5.2 |
| 2016 | 27.6°C | 20.6°C | 13.7°C | 33.5°C | 9.0°C | 14 mm | 48% | 1.6 m/s | 4.7 |
| 2015 | 28.7°C | 22.3°C | 15.8°C | 36.5°C | 11.3°C | 15 mm | 53% | 1.6 m/s | 4.6 |
| 2014 | 30.2°C | 22.7°C | 15.1°C | 37.1°C | 8.1°C | 2 mm | 41% | 1.4 m/s | 5.2 |
| 2013 | 25.9°C | 18.3°C | 10.7°C | 32.2°C | 4.9°C | 12 mm | 43% | 1.7 m/s | 5 |
| 2012 | 28.4°C | 21.0°C | 13.6°C | 39.9°C | 7.9°C | 5 mm | 45% | 1.7 m/s | 5 |
| 2011 | 28.4°C | 20.7°C | 12.9°C | 36.7°C | 6.1°C | 18 mm | 40% | 1.5 m/s | 4.9 |
| 2010 | 25.4°C | 19.0°C | 12.5°C | 34.8°C | 6.0°C | 36 mm | 58% | 1.7 m/s | 4.3 |
| 2009 | 25.9°C | 18.5°C | 11.1°C | 35.2°C | 3.8°C | 11 mm | 46% | 1.9 m/s | 4.9 |
| 2008 | 29.9°C | 22.1°C | 14.2°C | 35.9°C | 5.4°C | 1 mm | 29% | 1.9 m/s | 5.1 |
| 2007 | 27.0°C | 19.5°C | 12.0°C | 34.1°C | 5.1°C | 4 mm | 42% | 2 m/s | 5 |
| 2006 | 25.8°C | 18.6°C | 11.4°C | 31.2°C | 8.4°C | 2 mm | 49% | 1.7 m/s | 4.9 |
| 2005 | 26.4°C | 19.1°C | 11.8°C | 33.9°C | 7.9°C | 33 mm | 51% | 1.7 m/s | 4.8 |
| 2004 🌧️ | 24.6°C | 18.3°C | 11.9°C | 35.0°C | 5.3°C | 130 mm | 59% | 1.8 m/s | 4.6 |
| 2003 | 31.0°C | 23.5°C | 16.1°C | 37.5°C | 8.5°C | 3 mm | 37% | 1.6 m/s | 5.1 |
| 2002 | 25.1°C | 18.2°C | 11.3°C | 35.2°C | 7.8°C | 1 mm | 56% | 1.4 m/s | 4.7 |
| 2001 | 29.0°C | 21.5°C | 14.1°C | 36.6°C | 10.6°C | 2 mm | 44% | 1.4 m/s | 4.8 |
| 2000 | 24.4°C | 17.9°C | 11.5°C | 32.1°C | 4.7°C | 25 mm | 60% | 1.8 m/s | 4.5 |
| 1999 | 31.1°C | 22.9°C | 14.6°C | 36.6°C | 9.3°C | 2 mm | 29% | 1.8 m/s | 5.3 |
| 1998 | 26.1°C | 18.7°C | 11.3°C | 31.1°C | 6.6°C | 3 mm | 44% | 1.6 m/s | 4.9 |
| 1997 | 26.3°C | 18.9°C | 11.5°C | 33.7°C | 6.0°C | 6 mm | 49% | 1.9 m/s | 5.1 |
| 1996 | 26.5°C | 19.1°C | 11.6°C | 37.5°C | 4.2°C | 25 mm | 40% | 1.9 m/s | 4.8 |
| 1995 | 28.8°C | 20.9°C | 13.1°C | 34.7°C | 8.4°C | 1 mm | 38% | 1.6 m/s | 4.9 |
| 1994 | 25.8°C | 18.6°C | 11.5°C | 32.0°C | 7.3°C | 15 mm | 45% | 1.7 m/s | 4.9 |
| 1993 | 27.5°C | 20.0°C | 12.6°C | 36.7°C | 6.4°C | 4 mm | 44% | 1.8 m/s | 4.7 |
| 1992 | 27.5°C | 20.6°C | 13.6°C | 34.8°C | 7.8°C | 32 mm | 51% | 1.6 m/s | 4.5 |
| 1991 | 29.2°C | 22.0°C | 14.8°C | 38.0°C | 3.6°C | 14 mm | 40% | 1.8 m/s | 4.9 |
| 1990 | 29.5°C | 21.5°C | 13.6°C | 34.9°C | 9.7°C | 0 mm | 34% | 1.8 m/s | 4.9 |
| 1989 | 26.3°C | 18.9°C | 11.4°C | 33.0°C | 4.7°C | 12 mm | 45% | 1.7 m/s | 4.9 |
| 1988 | 29.2°C | 21.6°C | 14.0°C | 35.1°C | 8.5°C | 0 mm | 43% | 1.5 m/s | 4.9 |
| 1987 | 27.8°C | 21.3°C | 14.7°C | 38.4°C | 10.2°C | 81 mm | 54% | 1.4 m/s | 4.3 |
| 1986 | 25.8°C | 18.5°C | 11.1°C | 30.5°C | 5.9°C | 12 mm | 45% | 1.6 m/s | 4.5 |
| 1985 | 26.8°C | 19.5°C | 12.2°C | 35.2°C | 5.9°C | 9 mm | 45% | 1.9 m/s | 4.7 |
| 1984 | 25.0°C | 17.5°C | 10.0°C | 32.4°C | 5.8°C | 5 mm | 44% | 2 m/s | 4.7 |
| 1983 | 26.4°C | 19.5°C | 12.7°C | 32.4°C | 9.2°C | 19 mm | 54% | 1.7 m/s | — |
| 1982 | 26.3°C | 18.7°C | 11.2°C | 31.2°C | 6.4°C | 8 mm | 35% | 2 m/s | — |
| 1981 ❄️ | 24.5°C | 17.1°C | 9.7°C | 31.0°C | 5.1°C | 7 mm | 45% | 2.1 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 27.5°C with lows near 12.9°C (mean 20.2°C), based on 45 years of NASA POWER data.
October averages 14 mm of rainfall in San Bernardino, one of the drier months. The wettest on record was 130 mm in 2004.
The hottest October reached 41.4°C in 2024. The coldest dipped to 3.6°C in 1991.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 2.6°C. Daytime highs moved from 25.8°C to 28.3°C and overnight lows from 11.2°C to 13.9°C over the same span.
October is one of the warmer months of the year in San Bernardino and one of the drier months, so plan for around 27.5°C daytime highs and 12.9°C at night.
Not quite — October is the 8th coolest month in San Bernardino, averaging 20.2°C.
For October in San Bernardino, pack light layers you can adjust through the day, with typical highs of 27.5°C and lows of 12.9°C.
Relative humidity in October averages 45% — relatively dry.
Average wind speed in October is 1.7 m/s. The windiest October on record averaged 2.1 m/s (1981).
The wettest October on record was 2004 with 130 mm. On average, October sees 14 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in San Bernardino behaves each October, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for October specifically, along with year-by-year records and how the month has changed over the decades.
