October is one of the warmer months of the year in Williamsport, with average highs near 15.2°C and lows around 4.1°C (mean 9.6°C). It is about average for rainfall, averaging 90 mm of rainfall and 79% relative humidity across the period.
October is one of the warmer months of the year in Williamsport. Across 45 years of records, the warmest October in Williamsport was 2007 — when the month averaged 13.7°C — while the coldest was 1987 at 6.4°C. Typical October days reach 15.2°C with nights near 4.1°C. The long-term trend is warming, about 0.5°C per decade.
October is about average for rainfall in Williamsport, averaging 90 mm of rainfall. The wettest October on record was 1995 with 189 mm, while the driest was 1982 at 25 mm.
Relative humidity in Williamsport during October averages 79%. The most humid October was 2021 at 87%, and the least humid was 2024 at 71%.
October receives about 2.9 kWh/m²/day of solar energy in Williamsport. The sunniest October was 2024 at 3.5 kWh/m²/day, and the cloudiest were 2009 and 2012 at 2.3.
Average wind speed in Williamsport during October is 0.1 m/s. The windiest Octobers were 2022, 2023 and 2024, among others at 0.1 m/s, while the calmest were 2019, 2020 and 2025, among others at 0 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.9°C | 9.1°C | 9.5°C | 10.4°C | 11.0°C | +2.1°C |
| Avg High | 14.6°C | 15.0°C | 14.8°C | 15.7°C | 16.6°C | +2°C |
| Avg Low | 3.2°C | 3.3°C | 4.1°C | 5.1°C | 5.4°C | +2.2°C |
| Avg Rain | 69 mm | 84 mm | 101 mm | 105 mm | 84 mm | +15 mm |
October temperatures in Williamsport have risen by about 1.5°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -6°C (1992) to a record high of 29.9°C (2019).
Rainfall in October is about average for rainfall, averaging 90 mm, with a wettest year of 189 mm.
A good time to visit Williamsport
October is a good time to visit Williamsport, with days averaging 15.2°C and nights around 4.1°C (mean 9.6°C, warmer than Williamsport's yearly average) and higher rainfall. July and August 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 | 16.4°C | 10.5°C | 4.6°C | 28.1°C | -1.7°C | 112 mm | 73% | 0 m/s | 3.2 |
| 2024 | 17.9°C | 11.2°C | 4.6°C | 25.1°C | -2.2°C | 28 mm | 71% | 0.1 m/s | 3.5 |
| 2023 | 16.6°C | 11.3°C | 6.1°C | 27.0°C | -1.8°C | 82 mm | 78% | 0.1 m/s | 2.8 |
| 2022 | 14.9°C | 9.2°C | 3.4°C | 21.7°C | -2.3°C | 60 mm | 78% | 0.1 m/s | 2.9 |
| 2021 | 17.8°C | 13.2°C | 8.6°C | 23.9°C | 0.7°C | 144 mm | 87% | 0.1 m/s | 2.5 |
| 2020 | 16.0°C | 10.6°C | 5.1°C | 25.1°C | -4.4°C | 79 mm | 76% | 0 m/s | 2.7 |
| 2019 | 16.8°C | 11.1°C | 5.4°C | 29.9°C | -1.0°C | 128 mm | 79% | 0 m/s | 2.7 |
| 2018 | 14.3°C | 9.7°C | 5.0°C | 26.0°C | -3.4°C | 110 mm | 87% | 0 m/s | 2.5 |
| 2017 | 19.0°C | 13.1°C | 7.2°C | 26.6°C | -1.8°C | 151 mm | 74% | 0.1 m/s | 3 |
| 2016 | 16.2°C | 10.5°C | 4.9°C | 25.7°C | -2.5°C | 134 mm | 80% | 0.1 m/s | 2.8 |
| 2015 | 14.8°C | 9.4°C | 4.0°C | 21.1°C | -3.7°C | 77 mm | 76% | 0 m/s | 3 |
| 2014 | 15.8°C | 10.7°C | 5.5°C | 23.4°C | -0.1°C | 79 mm | 77% | 0 m/s | 2.5 |
| 2013 | 16.7°C | 11.2°C | 5.7°C | 26.8°C | -3.0°C | 67 mm | 78% | 0 m/s | 2.9 |
| 2012 | 15.5°C | 10.6°C | 5.6°C | 23.8°C | -3.8°C | 104 mm | 82% | 0.1 m/s | 2.3 |
| 2011 | 13.9°C | 9.1°C | 4.3°C | 24.6°C | -4.6°C | 119 mm | 85% | 0.1 m/s | 2.5 |
| 2010 | 13.8°C | 8.8°C | 3.7°C | 20.8°C | -1.4°C | 85 mm | 83% | 0 m/s | 2.9 |
| 2009 | 12.9°C | 8.3°C | 3.8°C | 20.3°C | -4.0°C | 118 mm | 82% | 0.1 m/s | 2.3 |
| 2008 | 14.2°C | 8.4°C | 2.5°C | 24.2°C | -5.7°C | 73 mm | 75% | 0.1 m/s | 3.3 |
| 2007 🔥 | 19.4°C | 13.7°C | 8.0°C | 29.7°C | -1.9°C | 112 mm | 78% | 0.1 m/s | 2.9 |
| 2006 | 13.7°C | 8.4°C | 3.1°C | 23.2°C | -3.7°C | 114 mm | 81% | 0.1 m/s | 2.8 |
| 2005 | 15.0°C | 10.3°C | 5.6°C | 26.1°C | -0.5°C | 182 mm | 83% | 0.1 m/s | 2.4 |
| 2004 | 14.0°C | 9.2°C | 4.5°C | 21.7°C | 0.6°C | 67 mm | 85% | 0.1 m/s | 2.6 |
| 2003 | 13.3°C | 7.8°C | 2.3°C | 23.4°C | -4.0°C | 107 mm | 82% | 0.1 m/s | 2.9 |
| 2002 | 13.1°C | 8.3°C | 3.4°C | 26.0°C | -5.4°C | 128 mm | 83% | 0 m/s | 2.4 |
| 2001 | 15.6°C | 9.7°C | 3.9°C | 23.8°C | -3.2°C | 43 mm | 72% | 0.1 m/s | 3.3 |
| 2000 | 16.5°C | 10.4°C | 4.3°C | 24.2°C | -1.7°C | 66 mm | 74% | 0.1 m/s | 3 |
| 1999 | 14.2°C | 8.3°C | 2.3°C | 21.9°C | -3.2°C | 40 mm | 80% | 0.1 m/s | 2.9 |
| 1998 | 15.5°C | 9.9°C | 4.4°C | 20.2°C | -1.7°C | 79 mm | 77% | 0 m/s | 2.9 |
| 1997 | 15.3°C | 9.1°C | 2.9°C | 25.8°C | -4.1°C | 27 mm | 74% | 0 m/s | 3.2 |
| 1996 | 14.5°C | 8.9°C | 3.4°C | 21.2°C | -2.5°C | 112 mm | 81% | 0.1 m/s | 3 |
| 1995 🌧️ | 17.3°C | 11.2°C | 5.1°C | 25.1°C | -1.3°C | 189 mm | 79% | 0.1 m/s | 2.9 |
| 1994 | 14.2°C | 8.0°C | 1.8°C | 19.7°C | -2.2°C | 28 mm | 79% | 0.1 m/s | 3.2 |
| 1993 | 13.4°C | 7.8°C | 2.2°C | 22.0°C | -4.3°C | 84 mm | 79% | 0 m/s | 2.8 |
| 1992 | 13.1°C | 7.3°C | 1.5°C | 21.8°C | -6.0°C | 54 mm | 79% | 0.1 m/s | 2.6 |
| 1991 | 16.1°C | 10.0°C | 3.8°C | 24.3°C | -3.6°C | 54 mm | 75% | 0.1 m/s | 3 |
| 1990 | 16.2°C | 10.9°C | 5.5°C | 24.2°C | -5.6°C | 176 mm | 81% | 0 m/s | 3 |
| 1989 | 15.7°C | 9.9°C | 4.1°C | 24.8°C | -2.6°C | 110 mm | 78% | 0.1 m/s | 2.9 |
| 1988 | 11.7°C | 6.6°C | 1.4°C | 23.8°C | -5.1°C | 55 mm | 73% | 0 m/s | 2.7 |
| 1987 ❄️ | 11.9°C | 6.4°C | 0.8°C | 19.2°C | -4.4°C | 65 mm | 80% | 0.1 m/s | 3.2 |
| 1986 | 14.9°C | 9.2°C | 3.6°C | 23.7°C | -3.8°C | 66 mm | 80% | 0 m/s | 2.9 |
| 1985 | 15.8°C | 9.7°C | 3.6°C | 21.5°C | -4.8°C | 47 mm | 77% | 0 m/s | 2.9 |
| 1984 | 17.6°C | 11.8°C | 6.0°C | 23.6°C | -3.5°C | 58 mm | 80% | 0.1 m/s | 3 |
| 1983 | 15.3°C | 9.6°C | 3.9°C | 25.2°C | -4.5°C | 73 mm | 74% | 0 m/s | — |
| 1982 | 15.8°C | 9.7°C | 3.6°C | 26.5°C | -5.3°C | 25 mm | 73% | 0.1 m/s | — |
| 1981 | 13.0°C | 7.3°C | 1.7°C | 19.5°C | -4.5°C | 120 mm | 76% | 0.1 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 15.2°C with lows near 4.1°C (mean 9.6°C), based on 45 years of NASA POWER data.
October averages 90 mm of rainfall in Williamsport, about average for rainfall. The wettest on record was 189 mm in 1995.
The hottest October reached 29.9°C in 2019. The coldest dipped to -6°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 1.5°C. Daytime highs moved from 15.5°C to 16.7°C and overnight lows from 3.8°C to 5.5°C over the same span.
October is one of the warmer months of the year in Williamsport and about average for rainfall, so plan for around 15.2°C daytime highs and 4.1°C at night.
Not quite — October is the 7th coolest month in Williamsport, averaging 9.6°C.
For October in Williamsport, pack warm layers and a jacket for chilly mornings, with typical highs of 15.2°C and lows of 4.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 79% — quite humid.
Average wind speed in October is 0.1 m/s. The windiest October on record averaged 0.1 m/s (1981).
The wettest October on record was 1995 with 189 mm. On average, October sees 90 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 Williamsport 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.
