April is one of the cooler months of the year in Gravenhurst, with average highs near 10.6°C and lows around -0.7°C (mean 5°C). It is about average for rainfall, averaging 44 mm of rainfall and 74% relative humidity across the period.
April is one of the cooler months of the year in Gravenhurst. Across 45 years of records, the warmest April in Gravenhurst was 1987 — when the month averaged 8.9°C — while the coldest was 2018 at 1.1°C. Typical April days reach 10.6°C with nights near -0.7°C. The long-term April temperature trend is broadly flat.
April is about average for rainfall in Gravenhurst, averaging 44 mm of rainfall. The wettest April on record was 1991 with 95 mm, while the driest was 2020 at 17 mm.
Relative humidity in Gravenhurst during April averages 74%. The most humid April was 1985 at 86%, and the least humid was 2010 at 63%.
April receives about 4.5 kWh/m²/day of solar energy in Gravenhurst. The sunniest April was 2010 at 5.5 kWh/m²/day, and the cloudiest was 1996 at 3.7.
Average wind speed in Gravenhurst during April is 0.8 m/s. The windiest Aprils were 2009, 2013 and 2018, among others at 0.9 m/s, while the calmest were 1984, 1989 and 1992 at 0.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.0°C | 4.7°C | 5.0°C | 4.9°C | 5.7°C | +0.7°C |
| Avg High | 10.7°C | 10.1°C | 10.5°C | 10.8°C | 11.5°C | +0.8°C |
| Avg Low | -0.6°C | -0.8°C | -0.6°C | -1.0°C | -0.1°C | +0.5°C |
| Avg Rain | 52 mm | 53 mm | 49 mm | 32 mm | 26 mm | -26 mm |
April temperatures in Gravenhurst have risen by about 2°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -15.4°C (1982) to a record high of 29.5°C (2023).
Rainfall in April is about average for rainfall, averaging 44 mm, with a wettest year of 95 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0°C per decade, widening the gap between day and night.
A good time to visit Gravenhurst
April is a good time to visit Gravenhurst, with days averaging 10.6°C and nights around -0.7°C (mean 5°C, cooler than Gravenhurst's yearly average) and moderate rainfall. July and August 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 | 11.3°C | 5.2°C | -1.0°C | 24.0°C | -7.5°C | 30 mm | 67% | 0.8 m/s | 4.7 |
| 2024 | 12.5°C | 6.7°C | 0.9°C | 21.7°C | -5.5°C | 32 mm | 69% | 0.8 m/s | 4 |
| 2023 | 13.0°C | 6.7°C | 0.5°C | 29.5°C | -6.7°C | 35 mm | 70% | 0.8 m/s | 4.5 |
| 2022 | 10.4°C | 4.8°C | -0.8°C | 21.6°C | -5.1°C | 20 mm | 69% | 0.8 m/s | 4.6 |
| 2021 | 12.3°C | 6.6°C | 1.0°C | 23.8°C | -5.7°C | 21 mm | 70% | 0.8 m/s | 4.5 |
| 2020 | 9.4°C | 4.1°C | -1.2°C | 16.8°C | -6.5°C | 17 mm | 67% | 0.8 m/s | 4.5 |
| 2019 | 10.6°C | 4.9°C | -0.7°C | 20.6°C | -6.1°C | 38 mm | 72% | 0.8 m/s | 3.9 |
| 2018 ❄️ | 5.8°C | 1.1°C | -3.5°C | 19.2°C | -10.2°C | 43 mm | 73% | 0.9 m/s | 4.2 |
| 2017 | 13.7°C | 7.4°C | 1.0°C | 24.5°C | -4.7°C | 36 mm | 71% | 0.8 m/s | 4.3 |
| 2016 | 9.2°C | 2.8°C | -3.5°C | 21.5°C | -11.4°C | 20 mm | 65% | 0.7 m/s | 5 |
| 2015 | 11.4°C | 5.3°C | -0.7°C | 20.5°C | -5.6°C | 25 mm | 69% | 0.8 m/s | 4.9 |
| 2014 | 10.1°C | 4.4°C | -1.3°C | 18.1°C | -7.0°C | 31 mm | 72% | 0.8 m/s | 4.3 |
| 2013 | 9.7°C | 4.2°C | -1.4°C | 21.9°C | -6.2°C | 45 mm | 71% | 0.9 m/s | 4.3 |
| 2012 | 11.0°C | 4.9°C | -1.2°C | 21.9°C | -5.6°C | 19 mm | 67% | 0.8 m/s | 4.7 |
| 2011 | 11.0°C | 5.1°C | -0.7°C | 19.9°C | -5.2°C | 43 mm | 71% | 0.8 m/s | 4.3 |
| 2010 | 15.2°C | 8.6°C | 2.1°C | 26.9°C | -2.9°C | 18 mm | 63% | 0.8 m/s | 5.5 |
| 2009 | 11.1°C | 5.4°C | -0.3°C | 24.3°C | -5.4°C | 68 mm | 74% | 0.9 m/s | 4.5 |
| 2008 | 13.6°C | 7.3°C | 0.9°C | 26.2°C | -6.9°C | 35 mm | 72% | 0.8 m/s | 5.2 |
| 2007 | 9.0°C | 4.3°C | -0.4°C | 21.6°C | -9.2°C | 51 mm | 80% | 0.8 m/s | 3.9 |
| 2006 | 12.5°C | 6.4°C | 0.3°C | 23.0°C | -5.5°C | 46 mm | 75% | 0.7 m/s | 5 |
| 2005 | 11.6°C | 5.6°C | -0.5°C | 22.6°C | -4.8°C | 50 mm | 76% | 0.7 m/s | 4.7 |
| 2004 | 9.9°C | 4.6°C | -0.7°C | 21.0°C | -9.9°C | 44 mm | 81% | 0.8 m/s | 4.5 |
| 2003 | 8.2°C | 2.5°C | -3.3°C | 19.7°C | -15.2°C | 41 mm | 80% | 0.7 m/s | 4.4 |
| 2002 | 8.4°C | 3.9°C | -0.7°C | 23.8°C | -8.3°C | 69 mm | 83% | 0.7 m/s | 4.3 |
| 2001 | 11.1°C | 5.3°C | -0.5°C | 21.3°C | -4.5°C | 49 mm | 81% | 0.7 m/s | 4.8 |
| 2000 | 9.5°C | 4.3°C | -0.8°C | 17.1°C | -6.2°C | 37 mm | 77% | 0.8 m/s | 4.1 |
| 1999 | 11.6°C | 5.6°C | -0.5°C | 20.1°C | -5.0°C | 35 mm | 73% | 0.7 m/s | 5.1 |
| 1998 | 12.5°C | 6.2°C | -0.1°C | 19.6°C | -3.9°C | 23 mm | 70% | 0.7 m/s | 5.2 |
| 1997 | 9.0°C | 3.6°C | -1.7°C | 18.8°C | -12.3°C | 41 mm | 78% | 0.7 m/s | 4.6 |
| 1996 | 7.0°C | 2.0°C | -3.0°C | 17.9°C | -8.0°C | 87 mm | 77% | 0.7 m/s | 3.7 |
| 1995 | 7.9°C | 2.7°C | -2.6°C | 14.2°C | -10.5°C | 33 mm | 71% | 0.8 m/s | 3.9 |
| 1994 | 11.0°C | 5.0°C | -1.0°C | 21.0°C | -6.0°C | 60 mm | 75% | 0.7 m/s | 4.9 |
| 1993 | 10.3°C | 5.0°C | -0.4°C | 18.9°C | -4.1°C | 64 mm | 80% | 0.7 m/s | 4 |
| 1992 | 9.1°C | 4.0°C | -1.0°C | 18.3°C | -8.3°C | 43 mm | 78% | 0.6 m/s | 4.3 |
| 1991 🌧️ | 11.8°C | 6.8°C | 1.8°C | 21.6°C | -4.8°C | 95 mm | 81% | 0.7 m/s | 3.9 |
| 1990 | 10.9°C | 5.8°C | 0.8°C | 25.4°C | -6.6°C | 52 mm | 78% | 0.7 m/s | 4.4 |
| 1989 | 9.0°C | 3.4°C | -2.2°C | 16.1°C | -5.7°C | 21 mm | 73% | 0.6 m/s | 4.4 |
| 1988 | 11.5°C | 5.6°C | -0.3°C | 19.6°C | -4.4°C | 53 mm | 73% | 0.7 m/s | 4 |
| 1987 🔥 | 15.1°C | 8.9°C | 2.7°C | 27.8°C | -5.5°C | 24 mm | 70% | 0.7 m/s | 4.9 |
| 1986 | 13.3°C | 7.1°C | 0.9°C | 25.4°C | -6.3°C | 20 mm | 74% | 0.7 m/s | 5.1 |
| 1985 | 9.8°C | 4.4°C | -1.0°C | 23.7°C | -10.8°C | 82 mm | 86% | 0.8 m/s | 5 |
| 1984 | 11.4°C | 5.8°C | 0.3°C | 20.5°C | -5.1°C | 58 mm | 81% | 0.6 m/s | 4.7 |
| 1983 | 8.3°C | 3.5°C | -1.2°C | 16.3°C | -5.3°C | 70 mm | 83% | 0.7 m/s | — |
| 1982 | 7.5°C | 1.6°C | -4.2°C | 18.3°C | -15.4°C | 69 mm | 81% | 0.9 m/s | — |
| 1981 | 10.6°C | 4.9°C | -0.7°C | 19.4°C | -6.3°C | 68 mm | 78% | 0.9 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 10.6°C with lows near -0.7°C (mean 5°C), based on 45 years of NASA POWER data.
April averages 44 mm of rainfall in Gravenhurst, about average for rainfall. The wettest on record was 95 mm in 1991.
The hottest April reached 29.5°C in 2023. The coldest dipped to -15.4°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 2°C. Daytime highs moved from 9.5°C to 11.9°C and overnight lows from -1.4°C to 0.1°C over the same span.
April is one of the cooler months of the year in Gravenhurst and about average for rainfall, so plan for around 10.6°C daytime highs and -0.7°C at night.
Not quite — April is the 6th coolest month in Gravenhurst, averaging 5°C.
For April in Gravenhurst, pack warm layers and a jacket for chilly mornings, with typical highs of 10.6°C and lows of -0.7°C.
Relative humidity in April averages 74% — moderately humid.
Average wind speed in April is 0.8 m/s. The windiest April on record averaged 0.9 m/s (1981).
The wettest April on record was 1991 with 95 mm. On average, April sees 44 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 Gravenhurst 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.
