October is one of the warmer months of the year in Chambersburg, with average highs near 18°C and lows around 6.1°C (mean 12.1°C). It is about average for rainfall, averaging 85 mm of rainfall and 75% relative humidity across the period.
October is one of the warmer months of the year in Chambersburg. Across 45 years of records, the warmest October in Chambersburg was 2007 — when the month averaged 15.7°C — while the coldest was 1987 at 8.6°C. Typical October days reach 18°C with nights near 6.1°C. The long-term trend is warming, about 0.5°C per decade.
October is about average for rainfall in Chambersburg, averaging 85 mm of rainfall. The wettest October on record was 1990 with 191 mm, while the driest was 2024 at 16 mm.
Relative humidity in Chambersburg during October averages 75%. The most humid October was 2018 at 85%, and the least humid was 2001 at 61%.
October receives about 3.3 kWh/m²/day of solar energy in Chambersburg. The sunniest Octobers were 2001 and 2024 at 3.9 kWh/m²/day, and the cloudiest was 2002 at 2.5.
Average wind speed in Chambersburg during October is 0.9 m/s. The windiest October was 2001 at 1.1 m/s, while the calmest were 2004, 2021 and 2024, among others at 0.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.5°C | 11.5°C | 11.8°C | 12.7°C | 13.3°C | +1.8°C |
| Avg High | 17.7°C | 17.8°C | 17.5°C | 18.3°C | 19.5°C | +1.8°C |
| Avg Low | 5.4°C | 5.2°C | 6.0°C | 7.1°C | 7.3°C | +1.9°C |
| Avg Rain | 74 mm | 81 mm | 92 mm | 107 mm | 64 mm | -10 mm |
October temperatures in Chambersburg have risen by about 1°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -4.5°C (1992) to a record high of 33.9°C (2019).
Rainfall in October is about average for rainfall, averaging 85 mm, with a wettest year of 191 mm.
A good time to visit Chambersburg
October is a good time to visit Chambersburg, with days averaging 18°C and nights around 6.1°C (mean 12.1°C, warmer than Chambersburg's yearly average) and higher rainfall. August and June are marginally more temperate, but October still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 19.5°C | 13.0°C | 6.6°C | 28.9°C | 0.1°C | 77 mm | 67% | 1 m/s | 3.6 |
| 2024 | 20.5°C | 13.5°C | 6.6°C | 27.3°C | 0.6°C | 16 mm | 70% | 0.8 m/s | 3.9 |
| 2023 | 19.8°C | 13.7°C | 7.7°C | 28.6°C | 0.9°C | 48 mm | 72% | 0.9 m/s | 3.4 |
| 2022 | 17.5°C | 11.3°C | 5.1°C | 24.8°C | 0.1°C | 68 mm | 74% | 0.9 m/s | 3.2 |
| 2021 | 20.4°C | 15.3°C | 10.2°C | 26.6°C | 3.7°C | 73 mm | 84% | 0.8 m/s | 2.9 |
| 2020 | 19.1°C | 13.2°C | 7.4°C | 27.0°C | 0.0°C | 102 mm | 74% | 0.9 m/s | 3.1 |
| 2019 | 20.5°C | 14.3°C | 8.0°C | 33.9°C | 1.3°C | 116 mm | 71% | 1 m/s | 3 |
| 2018 | 17.0°C | 12.1°C | 7.3°C | 28.7°C | -2.4°C | 79 mm | 85% | 0.9 m/s | 3.1 |
| 2017 | 21.0°C | 15.0°C | 8.9°C | 29.0°C | 0.9°C | 162 mm | 74% | 0.9 m/s | 3.4 |
| 2016 | 19.6°C | 13.5°C | 7.5°C | 28.2°C | -1.3°C | 29 mm | 75% | 1 m/s | 3.5 |
| 2015 | 17.4°C | 11.7°C | 5.9°C | 25.7°C | -2.1°C | 90 mm | 76% | 0.9 m/s | 3.2 |
| 2014 | 18.2°C | 12.7°C | 7.3°C | 24.9°C | 1.9°C | 96 mm | 77% | 1 m/s | 2.9 |
| 2013 | 18.3°C | 12.9°C | 7.4°C | 30.6°C | -2.6°C | 160 mm | 78% | 0.9 m/s | 3 |
| 2012 | 17.5°C | 12.2°C | 7.0°C | 26.0°C | -1.5°C | 164 mm | 81% | 0.9 m/s | 2.8 |
| 2011 | 15.8°C | 10.8°C | 5.8°C | 26.8°C | -4.1°C | 123 mm | 84% | 0.9 m/s | 2.8 |
| 2010 | 17.3°C | 11.7°C | 6.0°C | 25.6°C | -0.9°C | 52 mm | 79% | 0.9 m/s | 3.4 |
| 2009 | 16.0°C | 10.8°C | 5.5°C | 26.8°C | -2.2°C | 146 mm | 80% | 1 m/s | 2.9 |
| 2008 | 16.6°C | 10.6°C | 4.6°C | 26.9°C | -3.7°C | 44 mm | 73% | 0.9 m/s | 3.5 |
| 2007 🔥 | 21.7°C | 15.7°C | 9.7°C | 31.8°C | -0.9°C | 96 mm | 74% | 0.9 m/s | 3.5 |
| 2006 | 16.8°C | 11.0°C | 5.2°C | 27.5°C | -1.2°C | 101 mm | 76% | 1 m/s | 3.3 |
| 2005 | 17.8°C | 12.8°C | 7.7°C | 28.0°C | 0.0°C | 176 mm | 80% | 1 m/s | 2.7 |
| 2004 | 16.2°C | 11.2°C | 6.2°C | 23.4°C | 0.3°C | 52 mm | 84% | 0.8 m/s | 3.1 |
| 2003 | 15.8°C | 10.1°C | 4.3°C | 23.2°C | -2.7°C | 100 mm | 81% | 0.9 m/s | 3.3 |
| 2002 | 15.8°C | 10.8°C | 5.9°C | 28.7°C | -3.6°C | 144 mm | 83% | 0.8 m/s | 2.5 |
| 2001 | 19.4°C | 12.5°C | 5.6°C | 27.7°C | -1.5°C | 28 mm | 61% | 1.1 m/s | 3.9 |
| 2000 | 19.3°C | 12.5°C | 5.7°C | 27.9°C | -1.4°C | 31 mm | 71% | 0.9 m/s | 3.5 |
| 1999 | 16.5°C | 10.3°C | 4.2°C | 22.7°C | -0.9°C | 62 mm | 80% | 0.9 m/s | 3.5 |
| 1998 | 18.5°C | 12.3°C | 6.1°C | 25.7°C | 0.3°C | 60 mm | 70% | 0.9 m/s | 3.3 |
| 1997 | 18.1°C | 11.6°C | 5.2°C | 28.5°C | -3.2°C | 38 mm | 71% | 0.9 m/s | 3.6 |
| 1996 | 16.3°C | 10.5°C | 4.7°C | 23.1°C | -0.4°C | 117 mm | 83% | 0.9 m/s | 3.3 |
| 1995 | 20.0°C | 13.5°C | 6.9°C | 28.0°C | 0.3°C | 160 mm | 74% | 1 m/s | 3.5 |
| 1994 | 17.4°C | 10.8°C | 4.2°C | 23.7°C | -0.5°C | 29 mm | 73% | 0.8 m/s | 3.7 |
| 1993 | 16.2°C | 10.4°C | 4.5°C | 23.8°C | -2.1°C | 75 mm | 76% | 0.9 m/s | 3.2 |
| 1992 | 16.8°C | 10.4°C | 4.0°C | 25.7°C | -4.5°C | 29 mm | 71% | 0.9 m/s | 3.2 |
| 1991 | 19.0°C | 12.2°C | 5.5°C | 27.7°C | -2.0°C | 52 mm | 71% | 0.9 m/s | 3.6 |
| 1990 🌧️ | 18.8°C | 12.9°C | 6.9°C | 27.7°C | -3.8°C | 191 mm | 77% | 1 m/s | 3.3 |
| 1989 | 18.5°C | 12.2°C | 5.9°C | 27.4°C | -1.0°C | 121 mm | 77% | 0.9 m/s | 3.3 |
| 1988 | 14.8°C | 8.9°C | 2.9°C | 26.1°C | -4.3°C | 36 mm | 69% | 1 m/s | 3.3 |
| 1987 ❄️ | 14.9°C | 8.6°C | 2.3°C | 20.7°C | -2.3°C | 53 mm | 74% | 0.9 m/s | 3.6 |
| 1986 | 18.4°C | 12.2°C | 6.0°C | 28.6°C | -1.2°C | 63 mm | 73% | 0.9 m/s | 3.4 |
| 1985 | 18.9°C | 12.8°C | 6.7°C | 26.9°C | -3.4°C | 64 mm | 74% | 0.9 m/s | 2.9 |
| 1984 | 20.9°C | 14.9°C | 8.9°C | 26.6°C | 2.3°C | 63 mm | 77% | 0.8 m/s | 3.3 |
| 1983 | 17.9°C | 11.9°C | 5.9°C | 29.3°C | -3.6°C | 123 mm | 74% | 0.9 m/s | — |
| 1982 | 18.6°C | 12.3°C | 6.0°C | 27.4°C | -3.6°C | 38 mm | 70% | 0.9 m/s | — |
| 1981 | 16.1°C | 9.9°C | 3.8°C | 27.3°C | -2.0°C | 102 mm | 71% | 0.9 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 18°C with lows near 6.1°C (mean 12.1°C), based on 45 years of NASA POWER data.
October averages 85 mm of rainfall in Chambersburg, about average for rainfall. The wettest on record was 191 mm in 1990.
The hottest October reached 33.9°C in 2019. The coldest dipped to -4.5°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1°C. Daytime highs moved from 18.5°C to 19.5°C and overnight lows from 6.3°C to 7.2°C over the same span.
October is one of the warmer months of the year in Chambersburg and about average for rainfall, so plan for around 18°C daytime highs and 6.1°C at night.
Not quite — October is the 7th coolest month in Chambersburg, averaging 12.1°C.
For October in Chambersburg, pack warm layers and a jacket for chilly mornings, with typical highs of 18°C and lows of 6.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 75% — quite humid.
Average wind speed in October is 0.9 m/s. The windiest October on record averaged 1.1 m/s (2001).
The wettest October on record was 1990 with 191 mm. On average, October sees 85 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 Chambersburg 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.
