April is one of the cooler months of the year in Markham, with average highs near 10.7°C and lows around 0.4°C (mean 5.6°C). It is about average for rainfall, averaging 57 mm of rainfall and 77% relative humidity across the period.
April is one of the cooler months of the year in Markham. Across 45 years of records, the warmest April in Markham was 1987 — when the month averaged 8.8°C — while the coldest was 2018 at 1.8°C. Typical April days reach 10.7°C with nights near 0.4°C. The long-term April temperature trend is broadly flat.
April is about average for rainfall in Markham, averaging 57 mm of rainfall. The wettest April on record was 2009 with 104 mm, while the driest was 1987 at 24 mm.
Relative humidity in Markham during April averages 77%. The most humid April was 1984 at 83%, and the least humid was 1998 at 68%.
April receives about 4.5 kWh/m²/day of solar energy in Markham. The sunniest April was 2010 at 5.3 kWh/m²/day, and the cloudiest were 1996 and 2019 at 3.7.
Average wind speed in Markham during April is 3.6 m/s. The windiest April was 1982 at 4.5 m/s, while the calmest was 1992 at 3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.7°C | 5.5°C | 5.6°C | 5.1°C | 6.0°C | +0.3°C |
| Avg High | 11.1°C | 10.7°C | 10.7°C | 10.2°C | 11.0°C | -0.1°C |
| Avg Low | 0.3°C | 0.4°C | 0.5°C | 0.0°C | 0.9°C | +0.6°C |
| Avg Rain | 43 mm | 51 mm | 68 mm | 67 mm | 52 mm | +9 mm |
April temperatures in Markham have risen by about 1.2°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -14.3°C (2003) to a record high of 27°C (1990).
Rainfall in April is about average for rainfall, averaging 57 mm, with a wettest year of 104 mm.
A good time to visit Markham
April is a good time to visit Markham, with days averaging 10.7°C and nights around 0.4°C (mean 5.6°C, cooler than Markham'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 | 11.1°C | 5.8°C | 0.4°C | 22.2°C | -5.8°C | 42 mm | 75% | 3.9 m/s | 4.6 |
| 2024 | 12.1°C | 7.1°C | 2.1°C | 19.2°C | -4.1°C | 81 mm | 78% | 3.8 m/s | 4.1 |
| 2023 | 12.5°C | 7.1°C | 1.7°C | 25.1°C | -5.5°C | 77 mm | 78% | 3.2 m/s | 4.6 |
| 2022 | 9.7°C | 4.8°C | -0.1°C | 19.3°C | -3.7°C | 42 mm | 78% | 3.5 m/s | 4.6 |
| 2021 | 11.2°C | 6.5°C | 1.7°C | 18.5°C | -4.7°C | 41 mm | 76% | 3.3 m/s | 4.5 |
| 2020 | 9.3°C | 4.5°C | -0.3°C | 14.4°C | -3.7°C | 28 mm | 74% | 3.7 m/s | 4.6 |
| 2019 | 9.3°C | 4.8°C | 0.2°C | 17.4°C | -5.9°C | 75 mm | 82% | 3.7 m/s | 3.7 |
| 2018 ❄️ | 5.8°C | 1.8°C | -2.3°C | 15.7°C | -7.7°C | 101 mm | 80% | 3.7 m/s | 4.2 |
| 2017 | 12.6°C | 7.4°C | 2.1°C | 20.8°C | -3.2°C | 98 mm | 81% | 3.8 m/s | 4.3 |
| 2016 | 8.2°C | 3.1°C | -2.0°C | 21.3°C | -10.7°C | 39 mm | 75% | 3.1 m/s | 4.8 |
| 2015 | 11.2°C | 5.7°C | 0.3°C | 19.3°C | -4.4°C | 54 mm | 77% | 3.7 m/s | 4.8 |
| 2014 | 9.9°C | 4.6°C | -0.7°C | 19.7°C | -7.8°C | 74 mm | 79% | 3.8 m/s | 4.6 |
| 2013 | 9.2°C | 4.2°C | -0.7°C | 21.0°C | -6.3°C | 78 mm | 80% | 3.9 m/s | 4.4 |
| 2012 | 10.9°C | 5.5°C | 0.0°C | 21.9°C | -3.2°C | 40 mm | 73% | 3.8 m/s | 4.7 |
| 2011 | 10.2°C | 5.3°C | 0.4°C | 19.8°C | -4.1°C | 74 mm | 80% | 3.8 m/s | 3.8 |
| 2010 | 14.4°C | 8.6°C | 2.8°C | 22.8°C | -1.8°C | 39 mm | 71% | 3.3 m/s | 5.3 |
| 2009 🌧️ | 10.8°C | 5.8°C | 0.8°C | 23.6°C | -4.6°C | 104 mm | 80% | 4.1 m/s | 4.7 |
| 2008 | 13.1°C | 7.4°C | 1.7°C | 21.8°C | -5.0°C | 50 mm | 79% | 3.1 m/s | 5.2 |
| 2007 | 9.0°C | 4.6°C | 0.2°C | 20.7°C | -7.6°C | 62 mm | 81% | 3.7 m/s | 3.9 |
| 2006 | 12.1°C | 6.7°C | 1.3°C | 21.1°C | -4.8°C | 51 mm | 79% | 3.3 m/s | 5 |
| 2005 | 11.5°C | 6.0°C | 0.6°C | 23.4°C | -2.5°C | 76 mm | 78% | 3.4 m/s | 4.5 |
| 2004 | 10.4°C | 5.6°C | 0.8°C | 20.7°C | -7.0°C | 69 mm | 83% | 3.6 m/s | 4.4 |
| 2003 | 8.8°C | 3.5°C | -1.8°C | 22.7°C | -14.3°C | 54 mm | 80% | 3.5 m/s | 4.5 |
| 2002 | 9.3°C | 4.8°C | 0.4°C | 24.3°C | -5.3°C | 92 mm | 83% | 3.3 m/s | 4 |
| 2001 | 11.7°C | 6.0°C | 0.4°C | 21.6°C | -3.9°C | 53 mm | 78% | 3.2 m/s | 4.7 |
| 2000 | 9.9°C | 5.1°C | 0.3°C | 20.1°C | -5.7°C | 68 mm | 78% | 3.4 m/s | 3.9 |
| 1999 | 11.6°C | 6.1°C | 0.6°C | 19.3°C | -3.4°C | 45 mm | 74% | 3.4 m/s | 4.9 |
| 1998 | 13.1°C | 7.2°C | 1.3°C | 20.5°C | -2.7°C | 30 mm | 68% | 3.1 m/s | 5.1 |
| 1997 | 9.5°C | 4.4°C | -0.7°C | 20.1°C | -9.1°C | 28 mm | 76% | 3.5 m/s | 4.7 |
| 1996 | 7.8°C | 3.1°C | -1.6°C | 18.8°C | -5.3°C | 76 mm | 78% | 3.8 m/s | 3.7 |
| 1995 | 8.1°C | 3.2°C | -1.6°C | 14.4°C | -7.7°C | 39 mm | 73% | 3.8 m/s | 4.2 |
| 1994 | 12.0°C | 6.0°C | 0.0°C | 22.1°C | -5.3°C | 68 mm | 73% | 4 m/s | 4.8 |
| 1993 | 10.8°C | 5.7°C | 0.6°C | 18.1°C | -2.8°C | 42 mm | 77% | 3.4 m/s | 4 |
| 1992 | 9.6°C | 4.9°C | 0.2°C | 18.8°C | -7.5°C | 59 mm | 75% | 3 m/s | 4.1 |
| 1991 | 12.4°C | 7.7°C | 3.0°C | 23.3°C | -3.9°C | 90 mm | 80% | 3.7 m/s | 3.9 |
| 1990 | 12.4°C | 7.0°C | 1.7°C | 27.0°C | -4.8°C | 35 mm | 75% | 3.5 m/s | 4.5 |
| 1989 | 10.0°C | 4.4°C | -1.2°C | 16.9°C | -5.0°C | 33 mm | 69% | 3.1 m/s | 4.4 |
| 1988 | 11.4°C | 5.7°C | 0.1°C | 18.2°C | -3.7°C | 30 mm | 73% | 3.6 m/s | 4.1 |
| 1987 🔥 | 14.4°C | 8.8°C | 3.3°C | 25.8°C | -4.2°C | 24 mm | 73% | 3.6 m/s | 4.6 |
| 1986 | 12.8°C | 7.0°C | 1.3°C | 22.4°C | -5.1°C | 36 mm | 75% | 3.4 m/s | 4.8 |
| 1985 | 11.4°C | 6.1°C | 0.8°C | 24.5°C | -8.4°C | 48 mm | 83% | 3.6 m/s | 5.2 |
| 1984 | 10.7°C | 5.8°C | 1.0°C | 21.1°C | -3.5°C | 53 mm | 83% | 3.4 m/s | 4.6 |
| 1983 | 8.8°C | 4.3°C | -0.2°C | 19.3°C | -4.1°C | 63 mm | 82% | 3.7 m/s | — |
| 1982 | 8.7°C | 3.1°C | -2.6°C | 18.5°C | -13.1°C | 48 mm | 77% | 4.5 m/s | — |
| 1981 | 11.7°C | 6.0°C | 0.2°C | 19.9°C | -5.5°C | 48 mm | 73% | 4.2 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 10.7°C with lows near 0.4°C (mean 5.6°C), based on 45 years of NASA POWER data.
April averages 57 mm of rainfall in Markham, about average for rainfall. The wettest on record was 104 mm in 2009.
The hottest April reached 27°C in 1990. The coldest dipped to -14.3°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.2°C. Daytime highs moved from 10.3°C to 11.3°C and overnight lows from -0.2°C to 1.2°C over the same span.
April is one of the cooler months of the year in Markham and about average for rainfall, so plan for around 10.7°C daytime highs and 0.4°C at night.
Not quite — April is the 6th coolest month in Markham, averaging 5.6°C.
For April in Markham, pack warm layers and a jacket for chilly mornings, with typical highs of 10.7°C and lows of 0.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 77% — quite humid.
Average wind speed in April is 3.6 m/s. The windiest April on record averaged 4.5 m/s (1982).
The wettest April on record was 2009 with 104 mm. On average, April sees 57 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 Markham 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.
