October is one of the warmer months of the year in Pasadena, with average highs near 26.7°C and lows around 19.1°C (mean 22.9°C). It is a relatively wet time of year, averaging 128 mm of rainfall and 76% relative humidity across the period.
October is one of the warmer months of the year in Pasadena. Across 45 years of records, the warmest Octobers in Pasadena were 2004 and 2025 — when the month averaged 25.9°C — while the coldest was 2001 at 20.7°C. Typical October days reach 26.7°C with nights near 19.1°C. The long-term trend is warming, about 0.4°C per decade.
October is a relatively wet time of year in Pasadena, averaging 128 mm of rainfall. The wettest October on record was 2006 with 376 mm, while the driest was 1987 at 9 mm.
Relative humidity in Pasadena during October averages 76%. The most humid October was 2002 at 86%, and the least humid was 2010 at 63%.
October receives about 4.4 kWh/m²/day of solar energy in Pasadena. The sunniest October was 2010 at 5.2 kWh/m²/day, and the cloudiest was 1984 at 3.1.
Average wind speed in Pasadena during October is 3.3 m/s. The windiest October was 1985 at 3.9 m/s, while the calmest were 1999, 2008 and 2016, among others at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.5°C | 22.4°C | 22.7°C | 23.2°C | 24.2°C | +1.7°C |
| Avg High | 26.0°C | 26.2°C | 26.3°C | 27.2°C | 28.5°C | +2.5°C |
| Avg Low | 19.0°C | 18.6°C | 19.1°C | 19.2°C | 19.9°C | +0.9°C |
| Avg Rain | 125 mm | 132 mm | 168 mm | 121 mm | 73 mm | -51 mm |
October temperatures in Pasadena have risen by about 1.6°C between 1981–1985 and 2021–2025.
October has ranged from a record low of 2.2°C (1993) to a record high of 35.2°C (2024).
Rainfall in October is a relatively wet time of year, averaging 128 mm, with a wettest year of 376 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.6°C per decade while lows rose 0.2°C per decade, widening the gap between day and night.
One of the best times to visit Pasadena
October is one of the best times to visit Pasadena. Expect days averaging 26.7°C and nights around 19.1°C (mean 22.9°C) — warmer than Pasadena's yearly average — with higher rainfall (128 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 | 30.4°C | 25.9°C | 21.3°C | 33.7°C | 11.2°C | 62 mm | 67% | 3.1 m/s | 4.9 |
| 2024 | 30.4°C | 25.6°C | 20.9°C | 35.2°C | 13.7°C | 19 mm | 69% | 3.2 m/s | 5 |
| 2023 | 27.4°C | 23.5°C | 19.6°C | 33.1°C | 10.0°C | 102 mm | 74% | 3.7 m/s | 4.2 |
| 2022 | 27.8°C | 23.0°C | 18.3°C | 32.6°C | 8.9°C | 52 mm | 66% | 3.1 m/s | 4.7 |
| 2021 | 27.2°C | 23.9°C | 20.6°C | 29.9°C | 11.0°C | 141 mm | 78% | 3 m/s | 4.5 |
| 2020 | 27.6°C | 23.1°C | 18.7°C | 31.3°C | 9.8°C | 63 mm | 78% | 3.3 m/s | 4.4 |
| 2019 | 26.4°C | 22.5°C | 18.6°C | 31.3°C | 5.7°C | 196 mm | 79% | 3.5 m/s | 4.4 |
| 2018 | 26.3°C | 23.2°C | 20.1°C | 30.3°C | 13.4°C | 185 mm | 85% | 3.5 m/s | 3.9 |
| 2017 | 26.7°C | 22.7°C | 18.7°C | 31.0°C | 6.5°C | 101 mm | 76% | 3.2 m/s | 4.7 |
| 2016 | 28.2°C | 24.6°C | 20.9°C | 30.8°C | 13.7°C | 20 mm | 76% | 2.9 m/s | 4.8 |
| 2015 | 27.6°C | 23.5°C | 19.5°C | 32.6°C | 15.3°C | 325 mm | 77% | 3.4 m/s | 4.4 |
| 2014 | 27.5°C | 23.5°C | 19.5°C | 31.0°C | 14.4°C | 77 mm | 75% | 3 m/s | 4.9 |
| 2013 | 26.6°C | 23.1°C | 19.6°C | 30.8°C | 11.3°C | 208 mm | 78% | 3 m/s | 4.2 |
| 2012 | 27.4°C | 23.0°C | 18.6°C | 30.4°C | 8.8°C | 20 mm | 70% | 3.2 m/s | 4.6 |
| 2011 | 27.4°C | 22.8°C | 18.3°C | 30.3°C | 9.4°C | 65 mm | 65% | 3.3 m/s | 4.9 |
| 2010 | 28.4°C | 23.4°C | 18.4°C | 31.4°C | 11.9°C | 10 mm | 63% | 3 m/s | 5.2 |
| 2009 | 25.6°C | 22.3°C | 18.9°C | 30.8°C | 11.4°C | 307 mm | 83% | 3.8 m/s | 3.7 |
| 2008 | 25.8°C | 21.7°C | 17.6°C | 29.8°C | 6.9°C | 69 mm | 72% | 2.9 m/s | 4.9 |
| 2007 | 26.6°C | 22.8°C | 19.0°C | 30.4°C | 10.2°C | 65 mm | 75% | 3.1 m/s | 4.8 |
| 2006 🌧️ | 26.3°C | 22.9°C | 19.5°C | 31.5°C | 10.7°C | 376 mm | 80% | 3.4 m/s | 4 |
| 2005 | 27.8°C | 23.2°C | 18.5°C | 32.7°C | 9.6°C | 61 mm | 67% | 3.4 m/s | 4.9 |
| 2004 🔥 | 29.2°C | 25.9°C | 22.7°C | 32.9°C | 14.1°C | 109 mm | 79% | 3.6 m/s | 3.9 |
| 2003 | 25.9°C | 22.2°C | 18.4°C | 28.6°C | 11.4°C | 129 mm | 82% | 3 m/s | 4.3 |
| 2002 | 25.4°C | 22.6°C | 19.9°C | 30.6°C | 11.6°C | 342 mm | 86% | 3.1 m/s | 3.4 |
| 2001 ❄️ | 24.4°C | 20.7°C | 17.0°C | 28.2°C | 10.5°C | 140 mm | 80% | 3.3 m/s | 4.5 |
| 2000 | 26.3°C | 23.0°C | 19.7°C | 31.3°C | 10.6°C | 78 mm | 77% | 3.4 m/s | 4 |
| 1999 | 27.6°C | 22.7°C | 17.9°C | 32.2°C | 11.3°C | 32 mm | 70% | 2.9 m/s | 4.8 |
| 1998 | 26.5°C | 23.6°C | 20.8°C | 31.6°C | 11.7°C | 204 mm | 83% | 3.7 m/s | 4.1 |
| 1997 | 25.1°C | 22.0°C | 18.9°C | 30.5°C | 7.5°C | 174 mm | 80% | 3.6 m/s | 3.7 |
| 1996 | 25.3°C | 22.1°C | 18.9°C | 28.0°C | 10.8°C | 78 mm | 81% | 3.8 m/s | 4.1 |
| 1995 | 26.6°C | 22.4°C | 18.2°C | 30.8°C | 12.7°C | 91 mm | 69% | 3.8 m/s | 4.5 |
| 1994 | 25.9°C | 22.4°C | 19.0°C | 31.7°C | 12.4°C | 339 mm | 80% | 3.2 m/s | 4 |
| 1993 | 25.9°C | 21.9°C | 17.9°C | 31.2°C | 2.2°C | 173 mm | 74% | 3.3 m/s | 4 |
| 1992 | 27.9°C | 23.4°C | 18.9°C | 31.4°C | 14.5°C | 59 mm | 71% | 3 m/s | 4.5 |
| 1991 | 26.1°C | 22.5°C | 19.0°C | 29.8°C | 7.9°C | 69 mm | 79% | 2.9 m/s | 4.5 |
| 1990 | 25.5°C | 21.1°C | 16.7°C | 32.3°C | 9.3°C | 96 mm | 73% | 3.1 m/s | 4.6 |
| 1989 | 26.5°C | 22.2°C | 18.0°C | 31.0°C | 7.0°C | 84 mm | 74% | 3.3 m/s | 4.5 |
| 1988 | 27.2°C | 23.0°C | 18.9°C | 29.4°C | 15.1°C | 36 mm | 72% | 3 m/s | 4.6 |
| 1987 | 26.0°C | 21.6°C | 17.2°C | 28.8°C | 12.6°C | 9 mm | 67% | 3 m/s | 4.9 |
| 1986 | 25.0°C | 21.8°C | 18.5°C | 31.0°C | 12.1°C | 229 mm | 79% | 3.1 m/s | 3.8 |
| 1985 | 25.3°C | 22.4°C | 19.5°C | 28.8°C | 11.8°C | 172 mm | 83% | 3.9 m/s | 3.7 |
| 1984 | 26.6°C | 24.0°C | 21.5°C | 28.5°C | 11.5°C | 295 mm | 85% | 3.3 m/s | 3.1 |
| 1983 | 25.2°C | 22.0°C | 18.8°C | 28.6°C | 11.5°C | 42 mm | 79% | 2.9 m/s | — |
| 1982 | 27.0°C | 23.0°C | 19.0°C | 32.2°C | 10.2°C | 75 mm | 72% | 3.5 m/s | — |
| 1981 | 25.3°C | 22.4°C | 19.5°C | 30.3°C | 8.7°C | 180 mm | 83% | 3.3 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 26.7°C with lows near 19.1°C (mean 22.9°C), based on 45 years of NASA POWER data.
October averages 128 mm of rainfall in Pasadena, a relatively wet time of year. The wettest on record was 376 mm in 2006.
The hottest October reached 35.2°C in 2024. The coldest dipped to 2.2°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.6°C. Daytime highs moved from 25.9°C to 28.6°C and overnight lows from 19.7°C to 20.1°C over the same span.
October is one of the warmer months of the year in Pasadena and a relatively wet time of year, so plan for around 26.7°C daytime highs and 19.1°C at night.
Not quite — October is the 7th coolest month in Pasadena, averaging 22.9°C.
For October in Pasadena, pack light layers you can adjust through the day, with typical highs of 26.7°C and lows of 19.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 76% — quite humid.
Average wind speed in October is 3.3 m/s. The windiest October on record averaged 3.9 m/s (1985).
The wettest October on record was 2006 with 376 mm. On average, October sees 128 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 Pasadena 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.
