April is one of the cooler months of the year in Granby, with average highs near 9.7°C and lows around -0.7°C (mean 4.5°C). It is about average for rainfall, averaging 88 mm of rainfall and 82% relative humidity across the period.
April is one of the cooler months of the year in Granby. Across 45 years of records, the warmest April in Granby was 1986 — when the month averaged 7.4°C — while the coldest was 2016 at 1.7°C. Typical April days reach 9.7°C with nights near -0.7°C. The long-term April temperature trend is broadly flat.
April is about average for rainfall in Granby, averaging 88 mm of rainfall. The wettest April on record was 1996 with 173 mm, while the driest was 2001 at 31 mm.
Relative humidity in Granby during April averages 82%. The most humid April was 2007 at 89%, and the least humid was 2016 at 74%.
April receives about 4.5 kWh/m²/day of solar energy in Granby. The sunniest April was 2016 at 5.4 kWh/m²/day, and the cloudiest was 2007 at 3.7.
Average wind speed in Granby during April is 0.8 m/s. The windiest April was 1982 at 1 m/s, while the calmest were 2012, 2017 and 2021, among others at 0.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 4.7°C | 4.3°C | 4.3°C | 4.3°C | 5.2°C | +0.5°C |
| Avg High | 10.0°C | 9.4°C | 9.4°C | 9.6°C | 10.7°C | +0.7°C |
| Avg Low | -0.6°C | -0.8°C | -0.7°C | -1.0°C | -0.3°C | +0.3°C |
| Avg Rain | 79 mm | 95 mm | 99 mm | 86 mm | 76 mm | -3 mm |
April temperatures in Granby have risen by about 1.8°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -14.6°C (2003) to a record high of 25.5°C (1990).
Rainfall in April is about average for rainfall, averaging 88 mm, with a wettest year of 173 mm.
A good time to visit Granby
April is a good time to visit Granby, with days averaging 9.7°C and nights around -0.7°C (mean 4.5°C, close to Granby's yearly average) and higher 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 | 11.0°C | 5.2°C | -0.6°C | 24.3°C | -8.3°C | 82 mm | 77% | 0.8 m/s | 4.4 |
| 2024 | 11.4°C | 5.7°C | 0.0°C | 20.1°C | -6.3°C | 67 mm | 78% | 0.8 m/s | 4.4 |
| 2023 | 12.3°C | 6.5°C | 0.6°C | 24.4°C | -8.1°C | 82 mm | 77% | 0.8 m/s | 4.4 |
| 2022 | 9.9°C | 4.5°C | -0.9°C | 17.9°C | -5.0°C | 98 mm | 78% | 0.8 m/s | 4.3 |
| 2021 | 12.0°C | 6.5°C | 1.0°C | 22.4°C | -6.8°C | 57 mm | 79% | 0.7 m/s | 4.5 |
| 2020 | 7.8°C | 3.0°C | -1.8°C | 15.9°C | -5.7°C | 68 mm | 79% | 0.8 m/s | 4.5 |
| 2019 | 9.1°C | 4.1°C | -0.9°C | 19.7°C | -6.5°C | 112 mm | 81% | 0.9 m/s | 3.9 |
| 2018 | 6.4°C | 2.0°C | -2.3°C | 18.9°C | -11.1°C | 110 mm | 81% | 0.8 m/s | 3.9 |
| 2017 | 12.1°C | 6.6°C | 1.0°C | 23.5°C | -3.8°C | 108 mm | 82% | 0.7 m/s | 3.8 |
| 2016 ❄️ | 7.8°C | 1.7°C | -4.5°C | 19.0°C | -13.4°C | 56 mm | 74% | 0.8 m/s | 5.4 |
| 2015 | 9.1°C | 3.8°C | -1.4°C | 19.2°C | -11.4°C | 62 mm | 79% | 0.8 m/s | 4.5 |
| 2014 | 9.9°C | 4.3°C | -1.4°C | 21.8°C | -9.5°C | 87 mm | 80% | 0.8 m/s | 4.5 |
| 2013 | 9.9°C | 4.1°C | -1.7°C | 21.6°C | -7.2°C | 49 mm | 76% | 0.9 m/s | 4.6 |
| 2012 | 9.8°C | 4.7°C | -0.3°C | 24.2°C | -4.5°C | 65 mm | 82% | 0.7 m/s | 4.5 |
| 2011 | 9.3°C | 4.6°C | -0.1°C | 23.1°C | -6.7°C | 122 mm | 83% | 0.8 m/s | 4.1 |
| 2010 | 12.4°C | 7.1°C | 1.7°C | 25.0°C | -2.2°C | 86 mm | 83% | 0.7 m/s | 4.5 |
| 2009 | 11.2°C | 5.4°C | -0.3°C | 24.9°C | -5.2°C | 66 mm | 82% | 0.8 m/s | 4.6 |
| 2008 | 12.0°C | 6.6°C | 1.3°C | 23.6°C | -6.2°C | 80 mm | 84% | 0.7 m/s | 5 |
| 2007 | 7.5°C | 3.3°C | -0.8°C | 22.0°C | -9.9°C | 125 mm | 89% | 0.8 m/s | 3.7 |
| 2006 | 10.6°C | 5.4°C | 0.1°C | 18.4°C | -5.5°C | 107 mm | 84% | 0.8 m/s | 4.6 |
| 2005 | 10.7°C | 5.4°C | 0.1°C | 19.0°C | -4.2°C | 136 mm | 83% | 0.7 m/s | 4.3 |
| 2004 | 8.8°C | 3.9°C | -1.0°C | 22.7°C | -7.4°C | 93 mm | 84% | 0.8 m/s | 4.4 |
| 2003 | 8.0°C | 2.5°C | -3.1°C | 21.6°C | -14.6°C | 98 mm | 82% | 0.7 m/s | 4.1 |
| 2002 | 10.1°C | 5.2°C | 0.4°C | 24.4°C | -9.0°C | 109 mm | 81% | 0.7 m/s | 4.2 |
| 2001 | 7.5°C | 2.5°C | -2.6°C | 21.1°C | -10.3°C | 31 mm | 88% | 0.7 m/s | 5.3 |
| 2000 | 7.6°C | 3.0°C | -1.5°C | 19.5°C | -11.4°C | 150 mm | 88% | 0.7 m/s | 3.9 |
| 1999 | 9.8°C | 4.3°C | -1.3°C | 17.4°C | -5.7°C | 38 mm | 79% | 0.7 m/s | 4.9 |
| 1998 | 12.3°C | 6.2°C | 0.0°C | 20.7°C | -4.8°C | 43 mm | 77% | 0.7 m/s | 5.3 |
| 1997 | 8.3°C | 3.0°C | -2.3°C | 19.2°C | -9.8°C | 72 mm | 82% | 0.8 m/s | 5.1 |
| 1996 🌧️ | 8.0°C | 3.4°C | -1.1°C | 16.3°C | -9.6°C | 173 mm | 85% | 0.7 m/s | 4.4 |
| 1995 | 7.3°C | 2.3°C | -2.7°C | 14.9°C | -13.6°C | 57 mm | 79% | 0.8 m/s | 4.5 |
| 1994 | 8.6°C | 4.1°C | -0.3°C | 21.0°C | -10.9°C | 132 mm | 87% | 0.8 m/s | 4.2 |
| 1993 | 10.4°C | 5.1°C | -0.1°C | 19.4°C | -4.9°C | 147 mm | 85% | 0.7 m/s | 3.9 |
| 1992 | 7.8°C | 3.1°C | -1.6°C | 21.6°C | -11.3°C | 73 mm | 85% | 0.7 m/s | 5.2 |
| 1991 | 11.2°C | 6.4°C | 1.6°C | 19.9°C | -3.4°C | 125 mm | 85% | 0.7 m/s | 4.5 |
| 1990 | 9.9°C | 5.0°C | 0.1°C | 25.5°C | -11.9°C | 93 mm | 86% | 0.7 m/s | 4.1 |
| 1989 | 7.5°C | 2.9°C | -1.8°C | 15.1°C | -6.0°C | 55 mm | 81% | 0.7 m/s | 4.4 |
| 1988 | 10.8°C | 5.7°C | 0.5°C | 17.1°C | -4.4°C | 78 mm | 82% | 0.7 m/s | 4.1 |
| 1987 | 13.2°C | 7.2°C | 1.2°C | 25.1°C | -6.1°C | 50 mm | 79% | 0.7 m/s | 4.5 |
| 1986 🔥 | 13.2°C | 7.4°C | 1.5°C | 25.2°C | -5.2°C | 58 mm | 80% | 0.7 m/s | 5.1 |
| 1985 | 8.1°C | 3.1°C | -1.9°C | 18.1°C | -10.3°C | 76 mm | 83% | 0.8 m/s | 4.8 |
| 1984 | 10.0°C | 4.9°C | -0.2°C | 20.8°C | -8.2°C | 66 mm | 85% | 0.7 m/s | 4.4 |
| 1983 | 9.1°C | 4.2°C | -0.7°C | 19.4°C | -8.2°C | 136 mm | 87% | 0.7 m/s | — |
| 1982 | 7.1°C | 1.9°C | -3.3°C | 21.1°C | -14.1°C | 101 mm | 83% | 1 m/s | — |
| 1981 | 10.9°C | 5.2°C | -0.4°C | 18.2°C | -7.2°C | 92 mm | 79% | 0.9 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 9.7°C with lows near -0.7°C (mean 4.5°C), based on 45 years of NASA POWER data.
April averages 88 mm of rainfall in Granby, about average for rainfall. The wettest on record was 173 mm in 1996.
The hottest April reached 25.5°C in 1990. The coldest dipped to -14.6°C in 2003.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.8°C. Daytime highs moved from 9°C to 11.3°C and overnight lows from -1.3°C to 0°C over the same span.
April is one of the cooler months of the year in Granby and about average for rainfall, so plan for around 9.7°C daytime highs and -0.7°C at night.
Not quite — April is the 6th coolest month in Granby, averaging 4.5°C.
For April in Granby, pack warm layers and a jacket for chilly mornings, with typical highs of 9.7°C and lows of -0.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 82% — quite humid.
Average wind speed in April is 0.8 m/s. The windiest April on record averaged 1 m/s (1982).
The wettest April on record was 1996 with 173 mm. On average, April sees 88 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 Granby 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.
