April is one of the cooler months of the year in Windsor, with average highs near 13.3°C and lows around 1.7°C (mean 7.5°C). It is about average for rainfall, averaging 76 mm of rainfall and 75% relative humidity across the period.
April is one of the cooler months of the year in Windsor. Across 45 years of records, the warmest April in Windsor was 2010 — when the month averaged 10.5°C — while the coldest was 2018 at 3.8°C. Typical April days reach 13.3°C with nights near 1.7°C. The long-term trend is warming, about 0.2°C per decade.
April is about average for rainfall in Windsor, averaging 76 mm of rainfall. The wettest April on record was 2013 with 146 mm, while the driest was 2004 at 26 mm.
Relative humidity in Windsor during April averages 75%. The most humid April was 1993 at 80%, and the least humid was 2025 at 70%.
April receives about 4.7 kWh/m²/day of solar energy in Windsor. The sunniest April was 2008 at 5.5 kWh/m²/day, and the cloudiest were 1992 and 2011 at 3.7.
Average wind speed in Windsor during April is 3.8 m/s. The windiest Aprils were 1981, 1982 and 2011 at 4.4 m/s, while the calmest was 1989 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 7.2°C | 7.1°C | 7.9°C | 7.4°C | 8.1°C | +0.9°C |
| Avg High | 13.1°C | 12.7°C | 13.9°C | 13.2°C | 13.9°C | +0.8°C |
| Avg Low | 1.3°C | 1.4°C | 2.0°C | 1.7°C | 2.3°C | +1°C |
| Avg Rain | 70 mm | 84 mm | 69 mm | 88 mm | 67 mm | -3 mm |
April temperatures in Windsor have risen by about 1.5°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -13.5°C (2003) to a record high of 26.4°C (2023).
Rainfall in April is about average for rainfall, averaging 76 mm, with a wettest year of 146 mm.
A good time to visit Windsor
April is a good time to visit Windsor, with days averaging 13.3°C and nights around 1.7°C (mean 7.5°C, cooler than Windsor'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 | 14.9°C | 8.5°C | 2.0°C | 26.1°C | -5.3°C | 81 mm | 70% | 3.9 m/s | 5 |
| 2024 | 15.9°C | 10.3°C | 4.8°C | 24.4°C | -2.8°C | 95 mm | 73% | 4 m/s | 5 |
| 2023 | 14.8°C | 8.7°C | 2.6°C | 26.4°C | -4.5°C | 84 mm | 72% | 3.4 m/s | 4.5 |
| 2022 | 11.7°C | 6.4°C | 1.0°C | 24.9°C | -3.8°C | 58 mm | 76% | 3.7 m/s | 4.4 |
| 2021 | 14.7°C | 8.8°C | 2.9°C | 25.4°C | -5.2°C | 37 mm | 72% | 3.4 m/s | 4.7 |
| 2020 | 11.6°C | 6.1°C | 0.6°C | 19.5°C | -4.7°C | 48 mm | 76% | 3.6 m/s | 4.7 |
| 2019 | 12.5°C | 7.3°C | 2.2°C | 19.4°C | -6.8°C | 112 mm | 78% | 4 m/s | 4.3 |
| 2018 ❄️ | 9.0°C | 3.8°C | -1.4°C | 20.0°C | -6.3°C | 82 mm | 76% | 3.5 m/s | 4.6 |
| 2017 | 16.0°C | 10.3°C | 4.5°C | 24.1°C | -2.7°C | 101 mm | 78% | 4.1 m/s | 4.6 |
| 2016 | 12.1°C | 6.2°C | 0.4°C | 24.6°C | -6.3°C | 57 mm | 73% | 3.5 m/s | 4.7 |
| 2015 | 14.1°C | 7.7°C | 1.4°C | 22.0°C | -6.2°C | 56 mm | 73% | 3.7 m/s | 4.5 |
| 2014 | 13.5°C | 7.3°C | 1.1°C | 21.7°C | -5.5°C | 67 mm | 73% | 3.9 m/s | 4.8 |
| 2013 🌧️ | 11.8°C | 6.3°C | 0.8°C | 23.1°C | -4.7°C | 146 mm | 77% | 4 m/s | 4.2 |
| 2012 | 13.9°C | 8.0°C | 2.1°C | 22.0°C | -2.0°C | 50 mm | 73% | 3.8 m/s | 5.1 |
| 2011 | 12.4°C | 7.0°C | 1.6°C | 24.4°C | -1.9°C | 132 mm | 79% | 4.4 m/s | 3.7 |
| 2010 🔥 | 17.0°C | 10.5°C | 3.9°C | 25.5°C | -1.8°C | 74 mm | 71% | 3.8 m/s | 4.9 |
| 2009 | 13.4°C | 7.7°C | 1.9°C | 24.6°C | -5.2°C | 144 mm | 77% | 4.3 m/s | 4.8 |
| 2008 | 15.0°C | 8.8°C | 2.6°C | 23.4°C | -5.4°C | 39 mm | 76% | 3.6 m/s | 5.5 |
| 2007 | 12.3°C | 7.0°C | 1.6°C | 23.4°C | -5.6°C | 69 mm | 74% | 4.3 m/s | 4.6 |
| 2006 | 15.4°C | 9.1°C | 2.9°C | 21.9°C | -3.1°C | 53 mm | 73% | 3.4 m/s | 5.1 |
| 2005 | 14.4°C | 8.2°C | 2.0°C | 24.8°C | -1.7°C | 47 mm | 71% | 4.1 m/s | 5 |
| 2004 | 14.1°C | 8.2°C | 2.3°C | 25.0°C | -5.3°C | 26 mm | 73% | 4.3 m/s | 4.7 |
| 2003 | 12.9°C | 6.5°C | 0.2°C | 25.2°C | -13.5°C | 78 mm | 75% | 3.9 m/s | 4.7 |
| 2002 | 13.1°C | 7.9°C | 2.7°C | 25.1°C | -4.3°C | 81 mm | 78% | 3.7 m/s | 4.4 |
| 2001 | 14.7°C | 8.4°C | 2.2°C | 23.8°C | -4.0°C | 71 mm | 75% | 3.8 m/s | 4.8 |
| 2000 | 13.3°C | 7.4°C | 1.5°C | 23.1°C | -5.3°C | 82 mm | 71% | 3.4 m/s | 4.4 |
| 1999 | 14.4°C | 8.7°C | 3.0°C | 22.8°C | -0.6°C | 120 mm | 73% | 3.7 m/s | 4.7 |
| 1998 | 14.2°C | 8.5°C | 2.7°C | 19.8°C | -2.7°C | 74 mm | 73% | 3.3 m/s | 5.2 |
| 1997 | 11.8°C | 6.0°C | 0.2°C | 20.8°C | -5.2°C | 33 mm | 72% | 3.4 m/s | 5 |
| 1996 | 11.1°C | 5.5°C | -0.2°C | 21.0°C | -5.4°C | 100 mm | 75% | 4 m/s | 4.4 |
| 1995 | 10.8°C | 5.4°C | 0.0°C | 18.8°C | -6.8°C | 84 mm | 74% | 4 m/s | 4 |
| 1994 | 13.5°C | 7.6°C | 1.7°C | 25.2°C | -4.8°C | 102 mm | 74% | 4.2 m/s | 5 |
| 1993 | 11.8°C | 6.3°C | 0.7°C | 18.8°C | -4.9°C | 87 mm | 80% | 3.8 m/s | 4.2 |
| 1992 | 11.7°C | 6.3°C | 0.9°C | 22.2°C | -5.5°C | 96 mm | 79% | 3.3 m/s | 3.7 |
| 1991 | 14.4°C | 9.0°C | 3.5°C | 23.7°C | -4.7°C | 88 mm | 80% | 4.3 m/s | 4.2 |
| 1990 | 13.5°C | 7.7°C | 1.9°C | 26.0°C | -5.6°C | 56 mm | 77% | 3.7 m/s | 4.8 |
| 1989 | 11.4°C | 5.6°C | -0.2°C | 20.0°C | -5.9°C | 60 mm | 73% | 3.1 m/s | 4.7 |
| 1988 | 13.6°C | 7.3°C | 1.0°C | 21.8°C | -4.5°C | 59 mm | 74% | 4 m/s | 5 |
| 1987 | 14.3°C | 8.7°C | 3.0°C | 25.5°C | -7.2°C | 47 mm | 76% | 3.8 m/s | 4.9 |
| 1986 | 14.5°C | 8.3°C | 2.1°C | 25.4°C | -4.2°C | 67 mm | 78% | 3.6 m/s | 4.8 |
| 1985 | 15.2°C | 9.7°C | 4.2°C | 24.6°C | -5.5°C | 59 mm | 78% | 3.9 m/s | 5.3 |
| 1984 | 12.4°C | 7.2°C | 1.9°C | 23.5°C | -3.1°C | 68 mm | 78% | 3.7 m/s | 4.4 |
| 1983 | 11.2°C | 5.8°C | 0.4°C | 22.0°C | -6.0°C | 111 mm | 78% | 3.9 m/s | — |
| 1982 | 10.8°C | 4.3°C | -2.3°C | 19.4°C | -12.4°C | 47 mm | 74% | 4.4 m/s | — |
| 1981 | 14.4°C | 8.1°C | 1.8°C | 22.1°C | -4.8°C | 111 mm | 72% | 4.4 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 13.3°C with lows near 1.7°C (mean 7.5°C), based on 45 years of NASA POWER data.
April averages 76 mm of rainfall in Windsor, about average for rainfall. The wettest on record was 146 mm in 2013.
The hottest April reached 26.4°C in 2023. The coldest dipped to -13.5°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.5°C. Daytime highs moved from 12.8°C to 14.4°C and overnight lows from 1.2°C to 2.7°C over the same span.
April is one of the cooler months of the year in Windsor and about average for rainfall, so plan for around 13.3°C daytime highs and 1.7°C at night.
Not quite — April is the 6th coolest month in Windsor, averaging 7.5°C.
For April in Windsor, pack warm layers and a jacket for chilly mornings, with typical highs of 13.3°C and lows of 1.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 75% — moderately humid.
Average wind speed in April is 3.8 m/s. The windiest April on record averaged 4.4 m/s (1981).
The wettest April on record was 2013 with 146 mm. On average, April sees 76 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 Windsor 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.
