October is one of the warmer months of the year in Summerside, with average highs near 12.4°C and lows around 6.6°C (mean 9.5°C). It is a relatively wet time of year, averaging 97 mm of rainfall and 81% relative humidity across the period.
October is one of the warmer months of the year in Summerside. Across 45 years of records, the warmest October in Summerside was 2017 — when the month averaged 12°C — while the coldest was 2009 at 7.1°C. Typical October days reach 12.4°C with nights near 6.6°C. The long-term trend is warming, about 0.5°C per decade.
October is a relatively wet time of year in Summerside, averaging 97 mm of rainfall. The wettest October on record was 2005 with 202 mm, while the driest was 1997 at 23 mm.
Relative humidity in Summerside during October averages 81%. The most humid October was 2005 at 87%, and the least humid was 1993 at 74%.
October receives about 2.3 kWh/m²/day of solar energy in Summerside. The sunniest Octobers were 2001 and 2022 at 2.8 kWh/m²/day, and the cloudiest was 1990 at 1.8.
Average wind speed in Summerside during October is 4.4 m/s. The windiest Octobers were 1998 and 1999 at 5.1 m/s, while the calmest was 2022 at 3.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.5°C | 9.0°C | 9.5°C | 9.9°C | 11.2°C | +2.7°C |
| Avg High | 11.5°C | 12.0°C | 12.2°C | 12.7°C | 14.2°C | +2.7°C |
| Avg Low | 5.5°C | 6.1°C | 6.8°C | 7.1°C | 8.3°C | +2.8°C |
| Avg Rain | 88 mm | 83 mm | 124 mm | 104 mm | 74 mm | -15 mm |
October temperatures in Summerside have risen by about 2.8°C between 1981–1985 and 2021–2025.
October has ranged from a record low of -1.3°C (2018) to a record high of 24.6°C (2025).
Rainfall in October is a relatively wet time of year, averaging 97 mm, with a wettest year of 202 mm.
A good time to visit Summerside
October is a good time to visit Summerside, with days averaging 12.4°C and nights around 6.6°C (mean 9.5°C, warmer than Summerside's yearly average) and higher rainfall. August and July 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 | 14.4°C | 11.6°C | 8.8°C | 24.6°C | 5.7°C | 73 mm | 80% | 3.9 m/s | 2.5 |
| 2024 | 13.5°C | 10.7°C | 7.8°C | 19.4°C | 1.2°C | 64 mm | 81% | 4.3 m/s | 2.4 |
| 2023 | 14.7°C | 11.9°C | 9.0°C | 20.8°C | 1.5°C | 102 mm | 85% | 3.7 m/s | 2.3 |
| 2022 | 15.1°C | 11.7°C | 8.4°C | 19.2°C | 4.1°C | 66 mm | 85% | 3.3 m/s | 2.8 |
| 2021 | 14.5°C | 11.7°C | 9.0°C | 19.0°C | 6.3°C | 76 mm | 84% | 3.6 m/s | 2.4 |
| 2020 | 12.9°C | 9.7°C | 6.5°C | 19.7°C | -0.1°C | 62 mm | 78% | 4.4 m/s | 2.3 |
| 2019 | 12.1°C | 9.5°C | 7.0°C | 16.7°C | 3.5°C | 92 mm | 84% | 3.8 m/s | 2.2 |
| 2018 | 10.3°C | 7.5°C | 4.7°C | 18.9°C | -1.3°C | 175 mm | 82% | 4.5 m/s | 2 |
| 2017 🔥 | 15.3°C | 12.0°C | 8.6°C | 20.6°C | 3.6°C | 56 mm | 80% | 4.5 m/s | 2.7 |
| 2016 | 13.0°C | 10.0°C | 7.1°C | 20.0°C | 1.7°C | 155 mm | 84% | 4.3 m/s | 2.4 |
| 2015 | 11.7°C | 8.6°C | 5.6°C | 19.9°C | -0.1°C | 90 mm | 80% | 4.6 m/s | 2.4 |
| 2014 | 14.0°C | 11.3°C | 8.5°C | 19.1°C | 4.1°C | 83 mm | 83% | 4.3 m/s | 2.4 |
| 2013 | 12.7°C | 9.6°C | 6.6°C | 20.5°C | -0.6°C | 58 mm | 79% | 3.8 m/s | 2.7 |
| 2012 | 13.2°C | 10.6°C | 7.9°C | 19.2°C | 3.6°C | 73 mm | 84% | 4.4 m/s | 2.2 |
| 2011 | 12.6°C | 10.2°C | 7.8°C | 21.5°C | 2.2°C | 170 mm | 85% | 4.7 m/s | 2 |
| 2010 | 12.1°C | 9.4°C | 6.7°C | 23.4°C | 0.7°C | 92 mm | 82% | 4.7 m/s | 2.3 |
| 2009 ❄️ | 9.4°C | 7.1°C | 4.9°C | 16.7°C | 0.6°C | 191 mm | 82% | 4.6 m/s | 2 |
| 2008 | 11.7°C | 9.2°C | 6.7°C | 17.3°C | 2.6°C | 52 mm | 83% | 4.5 m/s | 2.5 |
| 2007 | 13.2°C | 10.2°C | 7.3°C | 19.3°C | 0.7°C | 39 mm | 83% | 4.2 m/s | 2.4 |
| 2006 | 11.8°C | 9.4°C | 7.1°C | 18.4°C | 2.7°C | 193 mm | 82% | 4.4 m/s | 2.3 |
| 2005 🌧️ | 12.8°C | 10.4°C | 8.0°C | 20.7°C | 1.9°C | 202 mm | 87% | 4.7 m/s | 2 |
| 2004 | 12.9°C | 10.2°C | 7.6°C | 18.4°C | 1.7°C | 101 mm | 85% | 4.3 m/s | 2.1 |
| 2003 | 12.8°C | 10.0°C | 7.1°C | 19.8°C | 2.1°C | 145 mm | 82% | 4.5 m/s | 2.4 |
| 2002 | 10.8°C | 8.1°C | 5.4°C | 21.7°C | 1.2°C | 84 mm | 77% | 4.8 m/s | 2.3 |
| 2001 | 14.4°C | 11.0°C | 7.6°C | 22.2°C | 1.9°C | 55 mm | 78% | 4.4 m/s | 2.8 |
| 2000 | 12.0°C | 9.3°C | 6.5°C | 18.0°C | 2.1°C | 173 mm | 82% | 4.8 m/s | 2.2 |
| 1999 | 11.3°C | 8.3°C | 5.2°C | 18.0°C | 0.5°C | 110 mm | 77% | 5.1 m/s | 2 |
| 1998 | 11.3°C | 8.8°C | 6.3°C | 19.2°C | 1.1°C | 122 mm | 80% | 5.1 m/s | 2.1 |
| 1997 | 10.9°C | 8.1°C | 5.3°C | 17.5°C | 0.2°C | 23 mm | 77% | 4.1 m/s | 2.2 |
| 1996 | 10.7°C | 7.8°C | 4.9°C | 17.8°C | -0.4°C | 109 mm | 82% | 4.6 m/s | 2.2 |
| 1995 | 14.4°C | 11.2°C | 8.1°C | 19.8°C | 2.4°C | 70 mm | 80% | 4.2 m/s | 2.2 |
| 1994 | 12.7°C | 9.6°C | 6.6°C | 19.5°C | 2.6°C | 26 mm | 79% | 4.2 m/s | 2.2 |
| 1993 | 11.1°C | 7.6°C | 4.0°C | 18.9°C | 0.0°C | 81 mm | 74% | 4.8 m/s | 2.1 |
| 1992 | 11.3°C | 8.4°C | 5.6°C | 16.8°C | 0.8°C | 73 mm | 78% | 4.4 m/s | 2 |
| 1991 | 12.8°C | 10.1°C | 7.4°C | 18.9°C | 3.0°C | 92 mm | 85% | 4.7 m/s | 1.9 |
| 1990 | 13.0°C | 10.2°C | 7.3°C | 20.1°C | 0.2°C | 120 mm | 82% | 4.9 m/s | 1.8 |
| 1989 | 11.8°C | 8.5°C | 5.2°C | 18.1°C | 2.0°C | 57 mm | 82% | 4.2 m/s | 2.4 |
| 1988 | 10.5°C | 7.7°C | 4.9°C | 19.8°C | -0.2°C | 162 mm | 82% | 4.7 m/s | 2.1 |
| 1987 | 12.7°C | 9.4°C | 6.0°C | 20.1°C | 1.7°C | 130 mm | 82% | 3.8 m/s | 2.4 |
| 1986 | 10.6°C | 7.6°C | 4.5°C | 16.0°C | 0.3°C | 45 mm | 80% | 4.2 m/s | 2.2 |
| 1985 | 11.6°C | 8.8°C | 5.9°C | 20.1°C | -0.6°C | 65 mm | 76% | 4.9 m/s | 2.2 |
| 1984 | 10.9°C | 8.0°C | 5.0°C | 16.0°C | 0.4°C | 53 mm | 82% | 3.8 m/s | 2.1 |
| 1983 | 11.8°C | 9.1°C | 6.4°C | 20.8°C | 0.3°C | 55 mm | 81% | 4.5 m/s | — |
| 1982 | 11.6°C | 8.7°C | 5.8°C | 18.2°C | 0.9°C | 58 mm | 82% | 4 m/s | — |
| 1981 | 11.6°C | 8.7°C | 5.7°C | 16.6°C | 1.3°C | 171 mm | 83% | 4.5 m/s | — |
Actual recorded October data for each year, 1981–2025 — sourced from NASA POWER.
The average high in October is around 12.4°C with lows near 6.6°C (mean 9.5°C), based on 45 years of NASA POWER data.
October averages 97 mm of rainfall in Summerside, a relatively wet time of year. The wettest on record was 202 mm in 2005.
The hottest October reached 24.6°C in 2025. The coldest dipped to -1.3°C in 2018.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average October temperatures have risen by about 2.8°C. Daytime highs moved from 11.5°C to 14.4°C and overnight lows from 5.8°C to 8.6°C over the same span.
October is one of the warmer months of the year in Summerside and a relatively wet time of year, so plan for around 12.4°C daytime highs and 6.6°C at night.
Not quite — October is the 8th coolest month in Summerside, averaging 9.5°C.
For October in Summerside, pack warm layers and a jacket for chilly mornings, with typical highs of 12.4°C and lows of 6.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in October averages 81% — quite humid.
Average wind speed in October is 4.4 m/s. The windiest October on record averaged 5.1 m/s (1998).
The wettest October on record was 2005 with 202 mm. On average, October sees 97 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 Summerside 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.
