April is one of the cooler months of the year in Innisfil, with average highs near 9.8°C and lows around 0.2°C (mean 5°C). It is about average for rainfall, averaging 49 mm of rainfall and 77% relative humidity across the period.
April is one of the cooler months of the year in Innisfil. Across 45 years of records, the warmest April in Innisfil was 1987 — when the month averaged 8.6°C — while the coldest was 2018 at 1.3°C. Typical April days reach 9.8°C with nights near 0.2°C. The long-term April temperature trend is broadly flat.
April is about average for rainfall in Innisfil, averaging 49 mm of rainfall. The wettest April on record was 1991 with 105 mm, while the driest was 1987 at 20 mm.
Relative humidity in Innisfil during April averages 77%. The most humid April was 1985 at 85%, and the least humid was 2010 at 69%.
April receives about 4.5 kWh/m²/day of solar energy in Innisfil. The sunniest April was 2010 at 5.5 kWh/m²/day, and the cloudiest was 1996 at 3.7.
Average wind speed in Innisfil during April is 1.9 m/s. The windiest April was 1982 at 2.3 m/s, while the calmest were 1989, 1992 and 1998, among others at 1.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.0°C | 4.8°C | 5.0°C | 4.7°C | 5.6°C | +0.6°C |
| Avg High | 10.0°C | 9.6°C | 9.7°C | 9.5°C | 10.3°C | +0.3°C |
| Avg Low | 0.0°C | 0.1°C | 0.3°C | -0.1°C | 0.8°C | +0.8°C |
| Avg Rain | 42 mm | 50 mm | 59 mm | 49 mm | 37 mm | -4 mm |
April temperatures in Innisfil have risen by about 1.7°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -13.6°C (1982) to a record high of 25.9°C (1990).
Rainfall in April is about average for rainfall, averaging 49 mm, with a wettest year of 105 mm.
A good time to visit Innisfil
April is a good time to visit Innisfil, with days averaging 9.8°C and nights around 0.2°C (mean 5°C, cooler than Innisfil'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 | 10.3°C | 5.2°C | 0.1°C | 21.4°C | -6.4°C | 30 mm | 72% | 2.1 m/s | 4.7 |
| 2024 | 11.3°C | 6.7°C | 2.0°C | 18.0°C | -4.2°C | 55 mm | 74% | 2 m/s | 4 |
| 2023 | 11.6°C | 6.6°C | 1.5°C | 25.8°C | -5.7°C | 55 mm | 76% | 1.8 m/s | 4.5 |
| 2022 | 9.1°C | 4.6°C | 0.0°C | 18.7°C | -3.8°C | 31 mm | 75% | 1.9 m/s | 4.6 |
| 2021 | 10.8°C | 6.2°C | 1.7°C | 19.6°C | -4.7°C | 31 mm | 75% | 1.8 m/s | 4.5 |
| 2020 | 8.5°C | 4.1°C | -0.3°C | 14.3°C | -4.5°C | 22 mm | 72% | 2 m/s | 4.5 |
| 2019 | 8.9°C | 4.4°C | 0.0°C | 16.7°C | -5.2°C | 60 mm | 79% | 2 m/s | 3.9 |
| 2018 ❄️ | 5.0°C | 1.3°C | -2.4°C | 15.9°C | -7.7°C | 75 mm | 79% | 2.1 m/s | 4.2 |
| 2017 | 12.0°C | 7.0°C | 1.9°C | 20.4°C | -3.1°C | 66 mm | 79% | 2 m/s | 4.3 |
| 2016 | 7.9°C | 2.7°C | -2.4°C | 19.0°C | -10.2°C | 31 mm | 73% | 1.7 m/s | 5 |
| 2015 | 10.4°C | 5.3°C | 0.2°C | 18.9°C | -4.7°C | 39 mm | 73% | 1.9 m/s | 4.9 |
| 2014 | 9.1°C | 4.2°C | -0.6°C | 18.4°C | -6.6°C | 52 mm | 77% | 2 m/s | 4.3 |
| 2013 | 8.5°C | 4.0°C | -0.6°C | 19.1°C | -6.1°C | 64 mm | 78% | 2.1 m/s | 4.3 |
| 2012 | 10.0°C | 4.9°C | -0.1°C | 20.3°C | -4.0°C | 25 mm | 71% | 2.1 m/s | 4.7 |
| 2011 | 9.7°C | 4.9°C | 0.2°C | 18.1°C | -4.6°C | 57 mm | 77% | 2 m/s | 4.3 |
| 2010 | 13.5°C | 8.1°C | 2.7°C | 22.9°C | -1.3°C | 26 mm | 69% | 1.8 m/s | 5.5 |
| 2009 | 9.8°C | 5.1°C | 0.5°C | 21.7°C | -4.4°C | 96 mm | 80% | 2.2 m/s | 4.5 |
| 2008 | 12.3°C | 7.0°C | 1.6°C | 22.3°C | -5.4°C | 45 mm | 78% | 1.7 m/s | 5.2 |
| 2007 | 8.0°C | 4.0°C | 0.1°C | 19.8°C | -8.0°C | 60 mm | 82% | 2 m/s | 3.9 |
| 2006 | 11.4°C | 6.2°C | 1.1°C | 20.9°C | -4.8°C | 48 mm | 79% | 1.7 m/s | 5 |
| 2005 | 10.8°C | 5.7°C | 0.5°C | 22.8°C | -2.5°C | 56 mm | 78% | 1.8 m/s | 4.7 |
| 2004 | 9.3°C | 4.8°C | 0.4°C | 19.5°C | -7.7°C | 51 mm | 82% | 1.9 m/s | 4.5 |
| 2003 | 7.8°C | 2.8°C | -2.2°C | 20.0°C | -13.1°C | 44 mm | 80% | 1.8 m/s | 4.4 |
| 2002 | 8.2°C | 4.2°C | 0.2°C | 23.3°C | -6.5°C | 86 mm | 84% | 1.8 m/s | 4.3 |
| 2001 | 10.5°C | 5.3°C | 0.2°C | 20.8°C | -4.2°C | 64 mm | 80% | 1.7 m/s | 4.8 |
| 2000 | 9.0°C | 4.6°C | 0.2°C | 16.8°C | -4.8°C | 43 mm | 78% | 1.9 m/s | 4.1 |
| 1999 | 10.5°C | 5.5°C | 0.5°C | 18.6°C | -3.6°C | 39 mm | 76% | 1.7 m/s | 5.1 |
| 1998 | 11.8°C | 6.3°C | 0.9°C | 20.2°C | -3.0°C | 21 mm | 70% | 1.6 m/s | 5.2 |
| 1997 | 8.4°C | 3.7°C | -0.9°C | 18.3°C | -10.2°C | 35 mm | 78% | 1.8 m/s | 4.6 |
| 1996 | 6.6°C | 2.2°C | -2.2°C | 17.1°C | -7.0°C | 72 mm | 79% | 1.9 m/s | 3.7 |
| 1995 | 7.4°C | 2.9°C | -1.7°C | 12.5°C | -8.2°C | 32 mm | 73% | 2 m/s | 3.9 |
| 1994 | 10.6°C | 5.2°C | -0.1°C | 20.0°C | -5.9°C | 67 mm | 74% | 2 m/s | 4.9 |
| 1993 | 9.9°C | 5.1°C | 0.4°C | 18.0°C | -3.2°C | 47 mm | 79% | 1.7 m/s | 4 |
| 1992 | 8.6°C | 4.2°C | -0.2°C | 16.8°C | -7.8°C | 43 mm | 77% | 1.6 m/s | 4.3 |
| 1991 🌧️ | 11.3°C | 7.0°C | 2.6°C | 20.3°C | -3.6°C | 105 mm | 81% | 1.8 m/s | 3.9 |
| 1990 | 11.1°C | 6.3°C | 1.5°C | 25.9°C | -5.3°C | 36 mm | 76% | 1.9 m/s | 4.4 |
| 1989 | 8.6°C | 3.5°C | -1.5°C | 15.4°C | -5.0°C | 21 mm | 72% | 1.6 m/s | 4.4 |
| 1988 | 10.5°C | 5.3°C | 0.1°C | 18.6°C | -4.2°C | 36 mm | 74% | 1.8 m/s | 4 |
| 1987 🔥 | 13.9°C | 8.6°C | 3.2°C | 25.3°C | -3.7°C | 20 mm | 72% | 1.8 m/s | 4.9 |
| 1986 | 12.3°C | 6.8°C | 1.3°C | 23.6°C | -5.8°C | 20 mm | 75% | 1.7 m/s | 5.1 |
| 1985 | 9.9°C | 5.1°C | 0.4°C | 22.1°C | -7.9°C | 62 mm | 85% | 1.9 m/s | 5 |
| 1984 | 10.1°C | 5.4°C | 0.6°C | 19.5°C | -4.4°C | 50 mm | 83% | 1.6 m/s | 4.7 |
| 1983 | 7.8°C | 3.6°C | -0.6°C | 17.4°C | -4.4°C | 59 mm | 83% | 1.9 m/s | — |
| 1982 | 7.3°C | 2.1°C | -3.1°C | 17.2°C | -13.6°C | 56 mm | 80% | 2.3 m/s | — |
| 1981 | 10.0°C | 5.0°C | 0.0°C | 18.5°C | -5.4°C | 52 mm | 77% | 2.1 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 9.8°C with lows near 0.2°C (mean 5°C), based on 45 years of NASA POWER data.
April averages 49 mm of rainfall in Innisfil, about average for rainfall. The wettest on record was 105 mm in 1991.
The hottest April reached 25.9°C in 1990. The coldest dipped to -13.6°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.7°C. Daytime highs moved from 9°C to 10.6°C and overnight lows from -0.5°C to 1.1°C over the same span.
April is one of the cooler months of the year in Innisfil and about average for rainfall, so plan for around 9.8°C daytime highs and 0.2°C at night.
Not quite — April is the 6th coolest month in Innisfil, averaging 5°C.
For April in Innisfil, pack warm layers and a jacket for chilly mornings, with typical highs of 9.8°C and lows of 0.2°C.
Relative humidity in April averages 77% — quite humid.
Average wind speed in April is 1.9 m/s. The windiest April on record averaged 2.3 m/s (1982).
The wettest April on record was 1991 with 105 mm. On average, April sees 49 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 Innisfil 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.
