April is one of the cooler months of the year in Morristown, with average highs near 18.8°C and lows around 6.6°C (mean 12.7°C). It is about average for rainfall, averaging 105 mm of rainfall and 77% relative humidity across the period.
April is one of the cooler months of the year in Morristown. Across 45 years of records, the warmest April in Morristown was 2017 — when the month averaged 15.6°C — while the coldest was 1983 at 9.8°C. Typical April days reach 18.8°C with nights near 6.6°C. The long-term trend is warming, about 0.4°C per decade.
April is about average for rainfall in Morristown, averaging 105 mm of rainfall. The wettest April on record was 1998 with 250 mm, while the driest was 1986 at 35 mm.
Relative humidity in Morristown during April averages 77%. The most humid April was 2003 at 82%, and the least humid was 1986 at 69%.
April receives about 5.1 kWh/m²/day of solar energy in Morristown. The sunniest April was 2010 at 5.8 kWh/m²/day, and the cloudiest was 1984 at 4.2.
Average wind speed in Morristown during April is 0.7 m/s. The windiest April was 2011 at 0.9 m/s, while the calmest were 1989 and 2013 at 0.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.8°C | 12.2°C | 13.0°C | 13.5°C | 12.9°C | +1.1°C |
| Avg High | 17.8°C | 18.2°C | 19.0°C | 19.7°C | 19.1°C | +1.3°C |
| Avg Low | 5.8°C | 6.1°C | 7.0°C | 7.4°C | 6.8°C | +1°C |
| Avg Rain | 96 mm | 105 mm | 106 mm | 118 mm | 97 mm | +2 mm |
April temperatures in Morristown have risen by about 1.4°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -6.2°C (2007) to a record high of 29.1°C (1986).
Rainfall in April is about average for rainfall, averaging 105 mm, with a wettest year of 250 mm.
A good time to visit Morristown
April is a good time to visit Morristown, with days averaging 18.8°C and nights around 6.6°C (mean 12.7°C, close to Morristown's yearly average) and higher rainfall. June and September 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 | 21.2°C | 15.1°C | 8.9°C | 28.6°C | -3.2°C | 98 mm | 76% | 0.7 m/s | 5.2 |
| 2024 | 20.0°C | 14.2°C | 8.4°C | 27.1°C | -0.6°C | 85 mm | 78% | 0.7 m/s | 4.9 |
| 2023 | 19.5°C | 13.0°C | 6.5°C | 25.7°C | -0.3°C | 87 mm | 75% | 0.7 m/s | 5.4 |
| 2022 | 18.6°C | 12.1°C | 5.5°C | 26.3°C | -1.8°C | 79 mm | 75% | 0.7 m/s | 5.1 |
| 2021 | 17.9°C | 12.0°C | 6.2°C | 25.8°C | -5.4°C | 43 mm | 75% | 0.7 m/s | 5.5 |
| 2020 | 17.1°C | 11.3°C | 5.5°C | 23.7°C | -0.5°C | 192 mm | 77% | 0.8 m/s | 5.2 |
| 2019 | 20.3°C | 14.3°C | 8.4°C | 26.6°C | -5.4°C | 137 mm | 78% | 0.7 m/s | 5.3 |
| 2018 | 16.7°C | 10.3°C | 3.9°C | 22.9°C | -4.9°C | 98 mm | 78% | 0.7 m/s | 5.2 |
| 2017 🔥 | 21.4°C | 15.6°C | 9.8°C | 28.6°C | 0.1°C | 161 mm | 79% | 0.7 m/s | 5.1 |
| 2016 | 19.3°C | 13.0°C | 6.7°C | 25.1°C | -3.2°C | 73 mm | 75% | 0.7 m/s | 5.6 |
| 2015 | 19.5°C | 13.6°C | 7.8°C | 24.3°C | -1.9°C | 135 mm | 80% | 0.7 m/s | 5 |
| 2014 | 20.0°C | 13.5°C | 7.0°C | 26.0°C | -5.0°C | 104 mm | 78% | 0.7 m/s | 5.4 |
| 2013 | 18.5°C | 12.3°C | 6.2°C | 26.2°C | -2.5°C | 150 mm | 80% | 0.6 m/s | 5.2 |
| 2012 | 19.8°C | 13.9°C | 8.0°C | 26.7°C | -0.7°C | 89 mm | 78% | 0.7 m/s | 5.4 |
| 2011 | 20.4°C | 14.4°C | 8.3°C | 26.9°C | -0.5°C | 166 mm | 78% | 0.9 m/s | 5.2 |
| 2010 | 21.0°C | 14.5°C | 8.0°C | 28.0°C | 0.8°C | 72 mm | 74% | 0.7 m/s | 5.8 |
| 2009 | 18.5°C | 12.4°C | 6.3°C | 26.7°C | -3.2°C | 84 mm | 78% | 0.7 m/s | 5.2 |
| 2008 | 19.2°C | 13.0°C | 6.9°C | 25.2°C | 0.0°C | 90 mm | 77% | 0.7 m/s | 5 |
| 2007 | 17.4°C | 11.2°C | 5.0°C | 26.4°C | -6.2°C | 89 mm | 71% | 0.8 m/s | 5.3 |
| 2006 | 21.0°C | 15.0°C | 8.9°C | 25.8°C | -2.6°C | 156 mm | 77% | 0.7 m/s | 5.3 |
| 2005 | 18.2°C | 12.5°C | 6.7°C | 25.0°C | -0.9°C | 133 mm | 79% | 0.7 m/s | 4.6 |
| 2004 | 18.9°C | 12.7°C | 6.6°C | 26.6°C | -3.2°C | 81 mm | 77% | 0.7 m/s | 4.9 |
| 2003 | 19.4°C | 13.6°C | 7.8°C | 25.5°C | 1.3°C | 159 mm | 82% | 0.7 m/s | 4.9 |
| 2002 | 20.2°C | 14.1°C | 8.1°C | 27.0°C | -2.1°C | 59 mm | 77% | 0.7 m/s | 5.5 |
| 2001 | 20.2°C | 14.1°C | 8.0°C | 26.8°C | -2.1°C | 60 mm | 76% | 0.7 m/s | 5.4 |
| 2000 | 17.4°C | 11.4°C | 5.4°C | 24.5°C | -3.5°C | 145 mm | 78% | 0.8 m/s | 4.3 |
| 1999 | 19.6°C | 14.0°C | 8.3°C | 26.0°C | 1.1°C | 71 mm | 79% | 0.7 m/s | 4.8 |
| 1998 🌧️ | 17.6°C | 12.3°C | 7.1°C | 23.0°C | 0.0°C | 250 mm | 81% | 0.7 m/s | 4.4 |
| 1997 | 16.2°C | 9.9°C | 3.7°C | 23.1°C | -5.0°C | 108 mm | 75% | 0.7 m/s | 5.3 |
| 1996 | 16.8°C | 10.3°C | 3.9°C | 24.9°C | -4.1°C | 95 mm | 78% | 0.8 m/s | 4.9 |
| 1995 | 19.8°C | 13.2°C | 6.6°C | 27.8°C | -2.8°C | 47 mm | 74% | 0.7 m/s | 5.1 |
| 1994 | 20.2°C | 14.0°C | 7.8°C | 28.3°C | -2.1°C | 164 mm | 79% | 0.7 m/s | 5.3 |
| 1993 | 16.9°C | 10.7°C | 4.4°C | 23.5°C | -2.7°C | 72 mm | 77% | 0.7 m/s | 4.8 |
| 1992 | 17.8°C | 11.9°C | 6.0°C | 24.5°C | -4.9°C | 58 mm | 79% | 0.7 m/s | 4.8 |
| 1991 | 19.8°C | 14.1°C | 8.3°C | 25.1°C | 0.5°C | 106 mm | 81% | 0.7 m/s | 4.8 |
| 1990 | 17.4°C | 11.1°C | 4.7°C | 26.6°C | -4.5°C | 76 mm | 78% | 0.7 m/s | 5.1 |
| 1989 | 17.0°C | 11.5°C | 6.0°C | 25.2°C | -4.6°C | 105 mm | 79% | 0.6 m/s | 4.9 |
| 1988 | 18.0°C | 11.5°C | 5.0°C | 25.2°C | -0.6°C | 89 mm | 76% | 0.8 m/s | 5.2 |
| 1987 | 16.1°C | 10.7°C | 5.2°C | 26.7°C | -5.9°C | 107 mm | 82% | 0.7 m/s | 5.1 |
| 1986 | 19.9°C | 13.2°C | 6.6°C | 29.1°C | -4.0°C | 35 mm | 69% | 0.7 m/s | 5.4 |
| 1985 | 19.7°C | 13.5°C | 7.2°C | 27.0°C | -5.3°C | 63 mm | 74% | 0.7 m/s | 5.3 |
| 1984 | 16.8°C | 11.3°C | 5.9°C | 26.2°C | -1.3°C | 105 mm | 82% | 0.7 m/s | 4.2 |
| 1983 ❄️ | 15.5°C | 9.8°C | 4.2°C | 22.9°C | -5.5°C | 153 mm | 80% | 0.7 m/s | — |
| 1982 | 16.2°C | 10.1°C | 4.0°C | 22.5°C | -5.8°C | 83 mm | 76% | 0.8 m/s | — |
| 1981 | 21.2°C | 14.6°C | 7.9°C | 26.1°C | -0.8°C | 119 mm | 76% | 0.8 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 18.8°C with lows near 6.6°C (mean 12.7°C), based on 45 years of NASA POWER data.
April averages 105 mm of rainfall in Morristown, about average for rainfall. The wettest on record was 250 mm in 1998.
The hottest April reached 29.1°C in 1986. The coldest dipped to -6.2°C in 2007.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 1.4°C. Daytime highs moved from 17.9°C to 19.4°C and overnight lows from 5.8°C to 7.1°C over the same span.
April is one of the cooler months of the year in Morristown and about average for rainfall, so plan for around 18.8°C daytime highs and 6.6°C at night.
Not quite — April is the 6th coolest month in Morristown, averaging 12.7°C.
For April in Morristown, pack warm layers and a jacket for chilly mornings, with typical highs of 18.8°C and lows of 6.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 77% — quite humid.
Average wind speed in April is 0.7 m/s. The windiest April on record averaged 0.9 m/s (2011).
The wettest April on record was 1998 with 250 mm. On average, April sees 105 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 Morristown 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.
