July is one of the warmer months of the year in Sudbury, with average highs near 24.8°C and lows around 13.1°C (mean 19°C). It is about average for rainfall, averaging 72 mm of rainfall and 74% relative humidity across the period.
July is one of the warmer months of the year in Sudbury. Across 45 years of records, the warmest July in Sudbury was 2020 — when the month averaged 21.4°C — while the coldest was 2009 at 15.8°C. Typical July days reach 24.8°C with nights near 13.1°C. The long-term trend is warming, about 0.2°C per decade.
July is about average for rainfall in Sudbury, averaging 72 mm of rainfall. The wettest July on record was 1985 with 129 mm, while the driest was 1981 at 24 mm.
Relative humidity in Sudbury during July averages 74%. The most humid July was 2009 at 82%, and the least humid was 2012 at 63%.
July receives about 5.8 kWh/m²/day of solar energy in Sudbury. The sunniest July was 1989 at 6.9 kWh/m²/day, and the cloudiest was 2009 at 5.1.
Average wind speed in Sudbury during July is 0.6 m/s. The windiest Julys were 2021, 2022 and 2025, among others at 0.6 m/s, while the calmest were 2020, 2023 and 2024, among others at 0.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.1°C | 18.7°C | 18.3°C | 19.4°C | 19.7°C | +0.6°C |
| Avg High | 25.1°C | 24.6°C | 23.9°C | 25.3°C | 25.5°C | +0.4°C |
| Avg Low | 13.2°C | 12.8°C | 12.6°C | 13.4°C | 13.9°C | +0.7°C |
| Avg Rain | 60 mm | 70 mm | 81 mm | 67 mm | 88 mm | +28 mm |
July temperatures in Sudbury have risen by about 1°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 4.4°C (1997) to a record high of 36.6°C (2005).
Rainfall in July is about average for rainfall, averaging 72 mm, with a wettest year of 129 mm.
One of the best times to visit Sudbury
July is one of the best times to visit Sudbury. Expect days averaging 24.8°C and nights around 13.1°C (mean 19°C) — warmer than Sudbury's yearly average — with moderate rainfall (72 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 | 24.9°C | 19.2°C | 13.5°C | 29.8°C | 7.5°C | 118 mm | 78% | 0.6 m/s | 5.8 |
| 2024 | 25.9°C | 20.0°C | 14.1°C | 30.9°C | 9.1°C | 80 mm | 75% | 0.5 m/s | 5.6 |
| 2023 | 25.0°C | 19.4°C | 13.7°C | 30.7°C | 9.7°C | 104 mm | 75% | 0.5 m/s | 5.6 |
| 2022 | 25.6°C | 19.4°C | 13.1°C | 32.1°C | 8.3°C | 56 mm | 69% | 0.6 m/s | 5.9 |
| 2021 | 24.5°C | 18.8°C | 13.0°C | 29.8°C | 8.7°C | 80 mm | 73% | 0.6 m/s | 5.4 |
| 2020 🔥 | 27.0°C | 21.4°C | 15.8°C | 31.6°C | 10.8°C | 89 mm | 75% | 0.5 m/s | 5.7 |
| 2019 | 25.5°C | 19.7°C | 13.8°C | 31.8°C | 9.9°C | 66 mm | 78% | 0.5 m/s | 6.4 |
| 2018 | 26.5°C | 20.3°C | 14.0°C | 31.1°C | 8.1°C | 78 mm | 73% | 0.6 m/s | 6.3 |
| 2017 | 22.5°C | 17.4°C | 12.3°C | 27.2°C | 9.0°C | 115 mm | 81% | 0.6 m/s | 5.8 |
| 2016 | 25.7°C | 20.0°C | 14.2°C | 30.3°C | 9.6°C | 68 mm | 73% | 0.6 m/s | 6 |
| 2015 | 24.2°C | 18.2°C | 12.2°C | 32.0°C | 7.1°C | 60 mm | 78% | 0.6 m/s | 6.1 |
| 2014 | 21.6°C | 16.2°C | 10.7°C | 26.9°C | 7.2°C | 104 mm | 80% | 0.6 m/s | 5.4 |
| 2013 | 26.0°C | 19.5°C | 13.0°C | 33.3°C | 7.2°C | 50 mm | 70% | 0.6 m/s | 6.1 |
| 2012 | 27.5°C | 21.1°C | 14.6°C | 32.7°C | 11.5°C | 43 mm | 63% | 0.6 m/s | 6.2 |
| 2011 | 26.8°C | 20.5°C | 14.2°C | 31.5°C | 9.5°C | 50 mm | 72% | 0.5 m/s | 6.4 |
| 2010 | 26.9°C | 20.7°C | 14.6°C | 33.3°C | 8.4°C | 35 mm | 69% | 0.6 m/s | 6.1 |
| 2009 ❄️ | 20.8°C | 15.8°C | 10.7°C | 24.5°C | 7.2°C | 97 mm | 82% | 0.5 m/s | 5.1 |
| 2008 | 23.0°C | 17.9°C | 12.7°C | 26.1°C | 7.9°C | 91 mm | 80% | 0.6 m/s | 5.3 |
| 2007 | 24.1°C | 18.2°C | 12.2°C | 31.5°C | 6.5°C | 95 mm | 73% | 0.5 m/s | 5.7 |
| 2006 | 26.3°C | 20.4°C | 14.4°C | 32.0°C | 9.2°C | 73 mm | 73% | 0.6 m/s | 5.6 |
| 2005 | 27.7°C | 21.2°C | 14.7°C | 36.6°C | 7.5°C | 66 mm | 64% | 0.6 m/s | 6.2 |
| 2004 | 23.1°C | 17.6°C | 12.0°C | 28.7°C | 6.3°C | 103 mm | 78% | 0.5 m/s | 5.7 |
| 2003 | 23.4°C | 17.9°C | 12.4°C | 27.5°C | 8.8°C | 110 mm | 78% | 0.6 m/s | 5.5 |
| 2002 | 25.1°C | 19.3°C | 13.6°C | 29.5°C | 8.8°C | 64 mm | 79% | 0.6 m/s | 6.1 |
| 2001 | 22.2°C | 17.0°C | 11.7°C | 29.2°C | 5.7°C | 54 mm | 77% | 0.6 m/s | 5.9 |
| 2000 | 23.2°C | 17.6°C | 12.0°C | 28.3°C | 5.6°C | 62 mm | 74% | 0.5 m/s | 5.6 |
| 1999 | 25.7°C | 20.0°C | 14.3°C | 31.6°C | 9.7°C | 100 mm | 76% | 0.6 m/s | 5.7 |
| 1998 | 25.6°C | 19.4°C | 13.1°C | 32.5°C | 8.5°C | 38 mm | 66% | 0.6 m/s | 6.1 |
| 1997 | 24.1°C | 17.9°C | 11.7°C | 30.7°C | 4.4°C | 53 mm | 75% | 0.6 m/s | 6 |
| 1996 | 22.7°C | 17.2°C | 11.6°C | 27.7°C | 8.5°C | 77 mm | 75% | 0.6 m/s | 5.5 |
| 1995 | 25.6°C | 19.6°C | 13.5°C | 32.8°C | 7.6°C | 89 mm | 74% | 0.6 m/s | 5.4 |
| 1994 | 24.8°C | 19.0°C | 13.3°C | 28.9°C | 7.7°C | 90 mm | 75% | 0.6 m/s | 5.5 |
| 1993 | 26.0°C | 19.8°C | 13.6°C | 30.2°C | 8.8°C | 48 mm | 71% | 0.6 m/s | 5.9 |
| 1992 | 22.0°C | 16.1°C | 10.2°C | 26.3°C | 5.8°C | 73 mm | 74% | 0.5 m/s | 5.6 |
| 1991 | 24.9°C | 19.1°C | 13.3°C | 32.7°C | 7.8°C | 86 mm | 69% | 0.6 m/s | 5.8 |
| 1990 | 24.6°C | 18.8°C | 13.1°C | 31.1°C | 8.6°C | 44 mm | 72% | 0.5 m/s | 5.8 |
| 1989 | 25.4°C | 19.3°C | 13.2°C | 31.5°C | 7.4°C | 32 mm | 73% | 0.5 m/s | 6.9 |
| 1988 | 27.2°C | 20.9°C | 14.7°C | 35.0°C | 9.0°C | 69 mm | 70% | 0.5 m/s | 6.1 |
| 1987 | 27.1°C | 20.8°C | 14.4°C | 32.3°C | 7.0°C | 47 mm | 68% | 0.6 m/s | 5.8 |
| 1986 | 24.5°C | 18.7°C | 12.9°C | 30.4°C | 5.9°C | 80 mm | 75% | 0.6 m/s | 5.6 |
| 1985 🌧️ | 22.3°C | 16.9°C | 11.5°C | 26.5°C | 5.7°C | 129 mm | 79% | 0.6 m/s | 5.8 |
| 1984 | 23.2°C | 17.6°C | 12.0°C | 29.6°C | 6.8°C | 69 mm | 79% | 0.6 m/s | 5.6 |
| 1983 | 25.1°C | 19.5°C | 13.9°C | 31.2°C | 5.9°C | 38 mm | 78% | 0.6 m/s | — |
| 1982 | 24.7°C | 18.6°C | 12.6°C | 28.7°C | 5.2°C | 50 mm | 74% | 0.6 m/s | — |
| 1981 | 26.0°C | 19.6°C | 13.3°C | 30.6°C | 7.6°C | 24 mm | 70% | 0.5 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 24.8°C with lows near 13.1°C (mean 19°C), based on 45 years of NASA POWER data.
July averages 72 mm of rainfall in Sudbury, about average for rainfall. The wettest on record was 129 mm in 1985.
The hottest July reached 36.6°C in 2005. The coldest dipped to 4.4°C in 1997.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1°C. Daytime highs moved from 24.3°C to 25.2°C and overnight lows from 12.7°C to 13.5°C over the same span.
July is one of the warmer months of the year in Sudbury and about average for rainfall, so plan for around 24.8°C daytime highs and 13.1°C at night.
Not quite — July is the 12th coolest month in Sudbury, averaging 19°C.
For July in Sudbury, pack light layers you can adjust through the day, with typical highs of 24.8°C and lows of 13.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 74% — moderately humid.
Average wind speed in July is 0.6 m/s. The windiest July on record averaged 0.6 m/s (1982).
The wettest July on record was 1985 with 129 mm. On average, July sees 72 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 Sudbury 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.
