July is one of the warmer months of the year in Summerside, with average highs near 21.8°C and lows around 15.1°C (mean 18.5°C). It is about average for rainfall, averaging 82 mm of rainfall and 84% relative humidity across the period.
July is one of the warmer months of the year in Summerside. Across 45 years of records, the warmest July in Summerside was 2023 — when the month averaged 21.1°C — while the coldest was 1986 at 15.8°C. Typical July days reach 21.8°C with nights near 15.1°C. The long-term trend is warming, about 0.5°C per decade.
July is about average for rainfall in Summerside, averaging 82 mm of rainfall. The wettest July on record was 2023 with 162 mm, while the driest was 1987 at 24 mm.
Relative humidity in Summerside during July averages 84%. The most humid Julys were 1988 and 2023 at 87%, and the least humid was 1999 at 78%.
July receives about 5.6 kWh/m²/day of solar energy in Summerside. The sunniest Julys were 1997 and 2017 at 6.3 kWh/m²/day, and the cloudiest were 1996 and 2021 at 4.8.
Average wind speed in Summerside during July is 3.3 m/s. The windiest July was 2014 at 3.9 m/s, while the calmest was 1988 at 2.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.8°C | 18.1°C | 18.2°C | 19.0°C | 19.7°C | +1.9°C |
| Avg High | 21.2°C | 21.6°C | 21.4°C | 22.2°C | 22.8°C | +1.6°C |
| Avg Low | 14.4°C | 14.7°C | 14.9°C | 15.7°C | 16.5°C | +2.1°C |
| Avg Rain | 86 mm | 65 mm | 83 mm | 77 mm | 113 mm | +27 mm |
July temperatures in Summerside have risen by about 1.8°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 8°C (1992) to a record high of 28.1°C (2013).
Rainfall in July is about average for rainfall, averaging 82 mm, with a wettest year of 162 mm.
One of the best times to visit Summerside
July is one of the best times to visit Summerside. Expect days averaging 21.8°C and nights around 15.1°C (mean 18.5°C) — warmer than Summerside's yearly average — with higher rainfall (82 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 | 23.0°C | 19.6°C | 16.3°C | 27.1°C | 13.9°C | 60 mm | 81% | 3.3 m/s | 5.8 |
| 2024 | 24.0°C | 20.7°C | 17.3°C | 27.0°C | 13.8°C | 119 mm | 85% | 3.1 m/s | 5.6 |
| 2023 🔥 🌧️ | 24.0°C | 21.1°C | 18.2°C | 26.8°C | 14.8°C | 162 mm | 87% | 2.8 m/s | 5.5 |
| 2022 | 22.8°C | 19.5°C | 16.1°C | 26.8°C | 12.6°C | 85 mm | 82% | 3.7 m/s | 6.2 |
| 2021 | 20.9°C | 17.9°C | 14.8°C | 25.4°C | 12.0°C | 144 mm | 83% | 3.6 m/s | 4.8 |
| 2020 | 22.4°C | 19.3°C | 16.2°C | 26.2°C | 12.9°C | 108 mm | 85% | 2.9 m/s | 5.3 |
| 2019 | 22.1°C | 18.7°C | 15.3°C | 27.0°C | 10.8°C | 55 mm | 84% | 3.2 m/s | 6 |
| 2018 | 23.4°C | 20.0°C | 16.6°C | 26.3°C | 11.7°C | 69 mm | 83% | 3.3 m/s | 6.2 |
| 2017 | 21.9°C | 18.5°C | 15.2°C | 25.2°C | 11.9°C | 41 mm | 80% | 3.1 m/s | 6.3 |
| 2016 | 21.6°C | 18.5°C | 15.3°C | 25.2°C | 10.1°C | 81 mm | 84% | 3.3 m/s | 5.6 |
| 2015 | 20.9°C | 17.8°C | 14.6°C | 24.0°C | 12.7°C | 81 mm | 85% | 3 m/s | 5.2 |
| 2014 | 23.4°C | 20.2°C | 17.0°C | 25.2°C | 13.2°C | 76 mm | 84% | 3.9 m/s | 5.8 |
| 2013 | 22.7°C | 19.5°C | 16.3°C | 28.1°C | 13.5°C | 88 mm | 83% | 3.1 m/s | 5.6 |
| 2012 | 22.3°C | 18.9°C | 15.5°C | 25.2°C | 13.4°C | 44 mm | 81% | 3 m/s | 6.2 |
| 2011 | 21.2°C | 18.0°C | 14.8°C | 25.1°C | 12.1°C | 119 mm | 85% | 3.3 m/s | 5 |
| 2010 | 22.3°C | 19.4°C | 16.5°C | 24.9°C | 12.8°C | 118 mm | 85% | 3.4 m/s | 5.6 |
| 2009 | 20.7°C | 17.6°C | 14.5°C | 25.3°C | 9.8°C | 130 mm | 86% | 3.2 m/s | 5.3 |
| 2008 | 22.8°C | 19.6°C | 16.4°C | 25.7°C | 13.5°C | 61 mm | 86% | 3.1 m/s | 5.8 |
| 2007 | 21.8°C | 18.6°C | 15.4°C | 27.0°C | 9.8°C | 98 mm | 86% | 3 m/s | 5.4 |
| 2006 | 22.3°C | 19.0°C | 15.7°C | 25.6°C | 11.7°C | 124 mm | 87% | 3.4 m/s | 5.3 |
| 2005 | 20.8°C | 17.5°C | 14.1°C | 25.4°C | 10.5°C | 79 mm | 85% | 3.2 m/s | 5.4 |
| 2004 | 21.4°C | 18.1°C | 14.9°C | 25.3°C | 11.2°C | 55 mm | 86% | 3 m/s | 5 |
| 2003 | 21.8°C | 18.8°C | 15.9°C | 24.2°C | 14.0°C | 77 mm | 86% | 3.5 m/s | 5.5 |
| 2002 | 21.0°C | 17.6°C | 14.2°C | 25.2°C | 11.5°C | 78 mm | 83% | 3.2 m/s | 5.7 |
| 2001 | 20.8°C | 17.4°C | 13.9°C | 25.0°C | 11.1°C | 33 mm | 83% | 3.5 m/s | 6 |
| 2000 | 20.8°C | 17.6°C | 14.3°C | 25.1°C | 11.6°C | 92 mm | 84% | 3.4 m/s | 5.5 |
| 1999 | 23.1°C | 19.5°C | 15.9°C | 27.3°C | 12.1°C | 76 mm | 78% | 3.1 m/s | 5.8 |
| 1998 | 22.6°C | 19.0°C | 15.3°C | 26.1°C | 12.3°C | 53 mm | 79% | 3.3 m/s | 5.9 |
| 1997 | 21.9°C | 18.1°C | 14.4°C | 26.8°C | 11.1°C | 29 mm | 81% | 3.4 m/s | 6.3 |
| 1996 | 20.5°C | 17.3°C | 14.2°C | 23.4°C | 12.3°C | 100 mm | 86% | 3.5 m/s | 4.8 |
| 1995 | 22.6°C | 19.2°C | 15.7°C | 26.8°C | 12.2°C | 101 mm | 81% | 3.3 m/s | 5.6 |
| 1994 | 23.0°C | 19.8°C | 16.5°C | 26.4°C | 12.2°C | 35 mm | 81% | 3.4 m/s | 5.7 |
| 1993 | 20.0°C | 16.4°C | 12.8°C | 25.3°C | 9.8°C | 78 mm | 82% | 3 m/s | 5 |
| 1992 | 19.5°C | 15.9°C | 12.3°C | 23.4°C | 8.0°C | 66 mm | 82% | 3.3 m/s | 5.9 |
| 1991 | 21.2°C | 17.7°C | 14.2°C | 25.4°C | 9.7°C | 37 mm | 82% | 3 m/s | 5.9 |
| 1990 | 21.6°C | 18.5°C | 15.3°C | 27.0°C | 10.9°C | 72 mm | 84% | 2.9 m/s | 5.4 |
| 1989 | 21.2°C | 17.6°C | 14.0°C | 26.1°C | 11.4°C | 92 mm | 83% | 3.5 m/s | 5.8 |
| 1988 | 21.5°C | 18.1°C | 14.7°C | 24.9°C | 9.8°C | 85 mm | 87% | 2.7 m/s | 4.9 |
| 1987 | 21.8°C | 18.3°C | 14.9°C | 25.0°C | 10.7°C | 24 mm | 81% | 3.3 m/s | 5.8 |
| 1986 ❄️ | 19.1°C | 15.8°C | 12.5°C | 24.5°C | 9.2°C | 113 mm | 84% | 3.4 m/s | 5.4 |
| 1985 | 21.6°C | 18.0°C | 14.4°C | 24.5°C | 11.4°C | 32 mm | 85% | 3.6 m/s | 6.2 |
| 1984 | 22.1°C | 18.9°C | 15.6°C | 23.9°C | 12.4°C | 87 mm | 86% | 3.6 m/s | 5.2 |
| 1983 | 20.6°C | 17.4°C | 14.1°C | 24.9°C | 10.6°C | 128 mm | 85% | 3.5 m/s | — |
| 1982 | 21.6°C | 18.0°C | 14.5°C | 26.0°C | 9.3°C | 104 mm | 84% | 3.6 m/s | — |
| 1981 | 20.9°C | 17.7°C | 14.5°C | 24.2°C | 11.2°C | 106 mm | 85% | 3.2 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 21.8°C with lows near 15.1°C (mean 18.5°C), based on 45 years of NASA POWER data.
July averages 82 mm of rainfall in Summerside, about average for rainfall. The wettest on record was 162 mm in 2023.
The hottest July reached 28.1°C in 2013. The coldest dipped to 8°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.8°C. Daytime highs moved from 21.4°C to 22.9°C and overnight lows from 14.6°C to 16.5°C over the same span.
July is one of the warmer months of the year in Summerside and about average for rainfall, so plan for around 21.8°C daytime highs and 15.1°C at night.
Not quite — July is the 11th coolest month in Summerside, averaging 18.5°C.
For July in Summerside, pack light layers you can adjust through the day, with typical highs of 21.8°C and lows of 15.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 84% — quite humid.
Average wind speed in July is 3.3 m/s. The windiest July on record averaged 3.9 m/s (2014).
The wettest July on record was 2023 with 162 mm. On average, July sees 82 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 July, 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 July specifically, along with year-by-year records and how the month has changed over the decades.
