April is one of the cooler months of the year in Sudbury, with average highs near 13°C and lows around 4.2°C (mean 8.6°C). It is one of the drier months, averaging 45 mm of rainfall and 81% relative humidity across the period.
April is one of the cooler months of the year in Sudbury. Across 45 years of records, the warmest April in Sudbury was 2011 — when the month averaged 11.9°C — while the coldest was 1986 at 5.6°C. Typical April days reach 13°C with nights near 4.2°C. The long-term trend is warming, about 0.4°C per decade.
April is one of the drier months in Sudbury, averaging 45 mm of rainfall. The wettest April on record was 2000 with 111 mm, while the driest was 2007 at 2 mm.
Relative humidity in Sudbury during April averages 81%. The most humid April was 2001 at 87%, and the least humid was 1997 at 76%.
April receives about 4 kWh/m²/day of solar energy in Sudbury. The sunniest April was 2025 at 5 kWh/m²/day, and the cloudiest was 1989 at 3.2.
Average wind speed in Sudbury during April is 3.4 m/s. The windiest Aprils were 1991, 1994 and 2024 at 4.3 m/s, while the calmest was 2009 at 2.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 7.5°C | 8.5°C | 9.0°C | 9.0°C | 8.9°C | +1.4°C |
| Avg High | 11.7°C | 12.8°C | 13.4°C | 13.5°C | 13.7°C | +2°C |
| Avg Low | 3.3°C | 4.2°C | 4.6°C | 4.4°C | 4.2°C | +0.9°C |
| Avg Rain | 54 mm | 50 mm | 47 mm | 39 mm | 33 mm | -21 mm |
April temperatures in Sudbury have risen by about 1.1°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -3.3°C (1996) to a record high of 24.2°C (2018).
Rainfall in April is one of the drier months, averaging 45 mm, with a wettest year of 111 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.5°C per decade while lows rose 0.3°C per decade, widening the gap between day and night.
A good time to visit Sudbury
April is a good time to visit Sudbury, with days averaging 13°C and nights around 4.2°C (mean 8.6°C, cooler than Sudbury's yearly average) and moderate rainfall. August and July are marginally more temperate, but April still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 15.9°C | 10.6°C | 5.3°C | 22.2°C | 1.4°C | 20 mm | 79% | 2.9 m/s | 5 |
| 2024 | 13.4°C | 9.6°C | 5.7°C | 19.2°C | 0.8°C | 67 mm | 82% | 4.3 m/s | 3.9 |
| 2023 | 13.1°C | 8.6°C | 4.1°C | 16.8°C | -0.2°C | 56 mm | 81% | 3.4 m/s | 4.3 |
| 2022 | 13.9°C | 9.1°C | 4.4°C | 18.2°C | -1.9°C | 16 mm | 79% | 3.6 m/s | 4.6 |
| 2021 | 10.7°C | 5.7°C | 0.7°C | 14.9°C | -3.1°C | 8 mm | 78% | 3 m/s | 4.7 |
| 2020 | 15.3°C | 10.0°C | 4.8°C | 21.6°C | -0.4°C | 34 mm | 79% | 3.1 m/s | 4.8 |
| 2019 | 13.8°C | 9.0°C | 4.3°C | 21.0°C | -0.4°C | 14 mm | 79% | 3.2 m/s | 4.3 |
| 2018 | 13.9°C | 10.1°C | 6.3°C | 24.2°C | 2.1°C | 90 mm | 85% | 3.5 m/s | 3.3 |
| 2017 | 13.6°C | 8.8°C | 4.0°C | 20.9°C | -0.7°C | 15 mm | 79% | 3 m/s | 4.2 |
| 2016 | 11.5°C | 7.4°C | 3.2°C | 15.8°C | -0.2°C | 57 mm | 81% | 3.2 m/s | 4.1 |
| 2015 | 13.7°C | 8.6°C | 3.6°C | 21.2°C | 1.1°C | 27 mm | 80% | 3 m/s | 4.6 |
| 2014 | 14.9°C | 10.5°C | 6.1°C | 18.0°C | 1.1°C | 29 mm | 83% | 3.1 m/s | 3.9 |
| 2013 | 11.4°C | 7.1°C | 2.8°C | 19.8°C | -2.4°C | 31 mm | 81% | 3.8 m/s | 4.4 |
| 2012 | 11.5°C | 7.5°C | 3.4°C | 16.4°C | -2.8°C | 100 mm | 82% | 3.5 m/s | 3.4 |
| 2011 🔥 | 17.1°C | 11.9°C | 6.7°C | 23.8°C | 3.2°C | 7 mm | 79% | 3 m/s | 4.5 |
| 2010 | 13.8°C | 8.9°C | 4.0°C | 18.3°C | 0.6°C | 17 mm | 79% | 3 m/s | 4.6 |
| 2009 | 15.1°C | 10.3°C | 5.5°C | 18.4°C | 2.1°C | 25 mm | 83% | 2.8 m/s | 4.3 |
| 2008 | 12.0°C | 8.0°C | 4.0°C | 19.2°C | -2.1°C | 46 mm | 82% | 3.4 m/s | 3.9 |
| 2007 | 16.9°C | 11.4°C | 6.0°C | 21.7°C | 0.9°C | 2 mm | 80% | 2.9 m/s | 4.6 |
| 2006 | 12.6°C | 8.4°C | 4.3°C | 16.7°C | -2.2°C | 35 mm | 81% | 3.4 m/s | 3.9 |
| 2005 | 13.4°C | 9.0°C | 4.7°C | 18.9°C | -1.4°C | 41 mm | 83% | 3.1 m/s | 3.9 |
| 2004 | 13.7°C | 9.3°C | 4.9°C | 20.3°C | 0.5°C | 65 mm | 84% | 3.1 m/s | 3.8 |
| 2003 | 13.3°C | 8.8°C | 4.3°C | 20.7°C | -1.7°C | 31 mm | 82% | 3.5 m/s | 4.1 |
| 2002 | 13.6°C | 9.1°C | 4.6°C | 19.9°C | 0.0°C | 37 mm | 80% | 3.6 m/s | 4.2 |
| 2001 | 10.7°C | 7.1°C | 3.5°C | 16.9°C | -0.5°C | 76 mm | 87% | 3.8 m/s | 3.4 |
| 2000 🌧️ | 12.2°C | 8.4°C | 4.6°C | 17.4°C | -1.6°C | 111 mm | 85% | 3.4 m/s | 3.5 |
| 1999 | 13.2°C | 9.2°C | 5.2°C | 18.0°C | -1.7°C | 53 mm | 83% | 3.5 m/s | 4 |
| 1998 | 11.4°C | 8.1°C | 4.8°C | 18.8°C | -0.5°C | 100 mm | 85% | 3.5 m/s | 3.4 |
| 1997 | 13.6°C | 8.6°C | 3.6°C | 18.3°C | -0.9°C | 19 mm | 76% | 3.1 m/s | 3.7 |
| 1996 | 12.6°C | 8.1°C | 3.6°C | 19.4°C | -3.3°C | 26 mm | 81% | 2.9 m/s | 3.8 |
| 1995 | 13.6°C | 8.9°C | 4.1°C | 18.4°C | -1.8°C | 22 mm | 81% | 3.4 m/s | 3.7 |
| 1994 | 11.8°C | 7.8°C | 3.8°C | 20.9°C | 0.3°C | 67 mm | 82% | 4.3 m/s | 3.9 |
| 1993 | 14.0°C | 9.7°C | 5.4°C | 23.3°C | 1.5°C | 77 mm | 83% | 3.5 m/s | 3.4 |
| 1992 | 12.8°C | 8.5°C | 4.3°C | 18.8°C | 0.0°C | 42 mm | 79% | 3.8 m/s | 3.5 |
| 1991 | 12.4°C | 8.1°C | 3.7°C | 19.5°C | -0.6°C | 53 mm | 79% | 4.3 m/s | 3.8 |
| 1990 | 12.9°C | 8.0°C | 3.2°C | 20.2°C | -2.3°C | 40 mm | 78% | 3.6 m/s | 4.5 |
| 1989 | 10.0°C | 6.4°C | 2.7°C | 14.3°C | -2.6°C | 76 mm | 83% | 3.6 m/s | 3.2 |
| 1988 | 12.1°C | 7.8°C | 3.4°C | 18.1°C | -2.3°C | 42 mm | 83% | 3.2 m/s | 3.6 |
| 1987 | 14.4°C | 10.0°C | 5.5°C | 20.2°C | 1.8°C | 49 mm | 84% | 3.3 m/s | 3.5 |
| 1986 ❄️ | 9.4°C | 5.6°C | 1.9°C | 15.5°C | -2.3°C | 68 mm | 83% | 3.6 m/s | 3.4 |
| 1985 | 12.0°C | 8.0°C | 3.9°C | 18.4°C | -2.8°C | 48 mm | 82% | 4.1 m/s | 3.5 |
| 1984 | 12.2°C | 7.2°C | 2.3°C | 19.8°C | -2.6°C | 20 mm | 80% | 3 m/s | 4.5 |
| 1983 | 10.8°C | 6.9°C | 2.9°C | 15.9°C | -1.5°C | 101 mm | 86% | 3.5 m/s | — |
| 1982 | 12.5°C | 8.0°C | 3.5°C | 15.0°C | -0.9°C | 22 mm | 81% | 3.2 m/s | — |
| 1981 | 12.0°C | 8.0°C | 3.9°C | 18.4°C | -0.6°C | 64 mm | 82% | 3.5 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 13°C with lows near 4.2°C (mean 8.6°C), based on 45 years of NASA POWER data.
April averages 45 mm of rainfall in Sudbury, one of the drier months. The wettest on record was 111 mm in 2000.
The hottest April reached 24.2°C in 2018. The coldest dipped to -3.3°C in 1996.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.1°C. Daytime highs moved from 11.9°C to 13.4°C and overnight lows from 3.3°C to 4°C over the same span.
April is one of the cooler months of the year in Sudbury and one of the drier months, so plan for around 13°C daytime highs and 4.2°C at night.
Not quite — April is the 6th coolest month in Sudbury, averaging 8.6°C.
For April in Sudbury, pack warm layers and a jacket for chilly mornings, with typical highs of 13°C and lows of 4.2°C.
Relative humidity in April averages 81% — quite humid.
Average wind speed in April is 3.4 m/s. The windiest April on record averaged 4.3 m/s (1991).
The wettest April on record was 2000 with 111 mm. On average, April sees 45 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 April, 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 April specifically, along with year-by-year records and how the month has changed over the decades.
