April is one of the cooler months of the year in Mechanicsburg, with average highs near 16.1°C and lows around 4°C (mean 10.1°C). It is about average for rainfall, averaging 92 mm of rainfall and 78% relative humidity across the period.
April is one of the cooler months of the year in Mechanicsburg. Across 45 years of records, the warmest April in Mechanicsburg was 2017 — when the month averaged 13.6°C — while the coldest was 1982 at 7.4°C. Typical April days reach 16.1°C with nights near 4°C. The long-term trend is warming, about 0.5°C per decade.
April is about average for rainfall in Mechanicsburg, averaging 92 mm of rainfall. The wettest April on record was 1983 with 208 mm, while the driest was 1985 at 16 mm.
Relative humidity in Mechanicsburg during April averages 78%. The most humid April was 2011 at 84%, and the least humid was 2025 at 72%.
April receives about 4.7 kWh/m²/day of solar energy in Mechanicsburg. The sunniest April was 1997 at 5.4 kWh/m²/day, and the cloudiest was 2011 at 3.7.
Average wind speed in Mechanicsburg during April is 1.6 m/s. The windiest April was 1982 at 1.9 m/s, while the calmest were 2008, 2010 and 2023, among others at 1.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.2°C | 9.6°C | 10.4°C | 10.6°C | 10.9°C | +1.7°C |
| Avg High | 15.2°C | 15.6°C | 16.4°C | 16.7°C | 16.9°C | +1.7°C |
| Avg Low | 3.2°C | 3.5°C | 4.4°C | 4.6°C | 4.9°C | +1.7°C |
| Avg Rain | 93 mm | 87 mm | 96 mm | 90 mm | 96 mm | +3 mm |
April temperatures in Mechanicsburg have risen by about 2°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -8°C (1982) to a record high of 31.5°C (2002).
Rainfall in April is about average for rainfall, averaging 92 mm, with a wettest year of 208 mm.
A good time to visit Mechanicsburg
April is a good time to visit Mechanicsburg, with days averaging 16.1°C and nights around 4°C (mean 10.1°C, cooler than Mechanicsburg's yearly average) and higher rainfall. June 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 | 17.9°C | 11.8°C | 5.7°C | 27.1°C | -4.3°C | 64 mm | 72% | 1.7 m/s | 4.6 |
| 2024 | 17.5°C | 11.9°C | 6.3°C | 30.1°C | -0.4°C | 119 mm | 80% | 1.5 m/s | 4.4 |
| 2023 | 19.1°C | 12.5°C | 6.0°C | 27.9°C | -0.5°C | 110 mm | 74% | 1.4 m/s | 4.8 |
| 2022 | 15.7°C | 9.4°C | 3.1°C | 25.0°C | -2.5°C | 82 mm | 74% | 1.6 m/s | 4.6 |
| 2021 | 16.9°C | 10.9°C | 4.8°C | 26.9°C | -4.8°C | 60 mm | 75% | 1.5 m/s | 4.7 |
| 2020 | 14.2°C | 8.8°C | 3.3°C | 22.8°C | -2.7°C | 141 mm | 76% | 1.8 m/s | 4.3 |
| 2019 | 17.9°C | 12.0°C | 6.2°C | 23.9°C | -4.3°C | 98 mm | 80% | 1.6 m/s | 4.5 |
| 2018 | 13.8°C | 8.0°C | 2.2°C | 26.1°C | -4.6°C | 105 mm | 76% | 1.7 m/s | 4.5 |
| 2017 🔥 | 19.6°C | 13.6°C | 7.6°C | 28.6°C | -2.2°C | 77 mm | 78% | 1.5 m/s | 4.7 |
| 2016 | 16.0°C | 9.6°C | 3.2°C | 25.5°C | -5.5°C | 53 mm | 74% | 1.5 m/s | 5 |
| 2015 | 16.4°C | 10.2°C | 4.0°C | 24.6°C | -3.8°C | 70 mm | 76% | 1.6 m/s | 4.8 |
| 2014 | 15.1°C | 8.9°C | 2.7°C | 23.7°C | -5.0°C | 156 mm | 79% | 1.6 m/s | 4.6 |
| 2013 | 16.7°C | 10.6°C | 4.4°C | 26.5°C | -4.9°C | 58 mm | 76% | 1.6 m/s | 4.9 |
| 2012 | 16.3°C | 10.0°C | 3.8°C | 27.5°C | -1.2°C | 57 mm | 73% | 1.5 m/s | 5.3 |
| 2011 | 16.6°C | 11.2°C | 5.8°C | 26.2°C | -1.5°C | 176 mm | 84% | 1.8 m/s | 3.7 |
| 2010 | 18.7°C | 12.1°C | 5.6°C | 27.9°C | 0.2°C | 54 mm | 77% | 1.4 m/s | 5.3 |
| 2009 | 16.4°C | 10.4°C | 4.5°C | 30.1°C | -3.6°C | 104 mm | 77% | 1.6 m/s | 4.8 |
| 2008 | 17.1°C | 11.2°C | 5.4°C | 26.1°C | -3.1°C | 107 mm | 80% | 1.4 m/s | 4.7 |
| 2007 | 13.8°C | 8.3°C | 2.9°C | 25.8°C | -3.6°C | 110 mm | 78% | 1.7 m/s | 4.1 |
| 2006 | 18.0°C | 11.3°C | 4.6°C | 25.4°C | -3.4°C | 93 mm | 75% | 1.5 m/s | 5.3 |
| 2005 | 17.1°C | 10.7°C | 4.3°C | 26.2°C | -0.8°C | 107 mm | 78% | 1.5 m/s | 5.2 |
| 2004 | 16.0°C | 10.5°C | 5.0°C | 26.9°C | -4.1°C | 139 mm | 81% | 1.6 m/s | 4.4 |
| 2003 | 15.2°C | 9.3°C | 3.5°C | 25.9°C | -4.6°C | 71 mm | 82% | 1.5 m/s | 4.5 |
| 2002 | 18.1°C | 11.7°C | 5.3°C | 31.5°C | -4.6°C | 83 mm | 73% | 1.6 m/s | 4.7 |
| 2001 | 17.0°C | 10.6°C | 4.1°C | 28.6°C | -3.3°C | 55 mm | 77% | 1.4 m/s | 4.5 |
| 2000 | 15.5°C | 9.7°C | 3.9°C | 24.8°C | -3.2°C | 93 mm | 80% | 1.7 m/s | 4.2 |
| 1999 | 16.5°C | 10.0°C | 3.5°C | 25.6°C | -1.2°C | 83 mm | 76% | 1.5 m/s | 4.8 |
| 1998 | 16.4°C | 10.4°C | 4.4°C | 22.0°C | -1.8°C | 128 mm | 79% | 1.4 m/s | 4.9 |
| 1997 | 14.4°C | 8.3°C | 2.1°C | 21.6°C | -4.8°C | 34 mm | 75% | 1.7 m/s | 5.4 |
| 1996 | 14.6°C | 8.8°C | 2.9°C | 24.4°C | -4.0°C | 116 mm | 82% | 1.8 m/s | 4.5 |
| 1995 | 15.0°C | 8.5°C | 2.0°C | 25.8°C | -4.8°C | 54 mm | 74% | 1.6 m/s | 4.5 |
| 1994 | 17.7°C | 11.3°C | 5.0°C | 26.3°C | -3.9°C | 75 mm | 81% | 1.6 m/s | 5.3 |
| 1993 | 14.6°C | 8.6°C | 2.7°C | 22.1°C | -3.4°C | 173 mm | 82% | 1.6 m/s | 4.3 |
| 1992 | 14.3°C | 9.0°C | 3.6°C | 22.3°C | -3.9°C | 60 mm | 80% | 1.4 m/s | 4.2 |
| 1991 | 16.5°C | 10.8°C | 5.1°C | 26.1°C | -4.0°C | 62 mm | 82% | 1.5 m/s | 4.2 |
| 1990 | 16.1°C | 10.0°C | 4.0°C | 29.3°C | -4.5°C | 86 mm | 78% | 1.6 m/s | 4.5 |
| 1989 | 14.7°C | 8.4°C | 2.1°C | 23.1°C | -4.2°C | 45 mm | 76% | 1.4 m/s | 5 |
| 1988 | 14.3°C | 8.4°C | 2.5°C | 21.3°C | -2.9°C | 65 mm | 78% | 1.7 m/s | 4.9 |
| 1987 | 14.9°C | 9.5°C | 4.2°C | 25.2°C | -4.4°C | 86 mm | 83% | 1.5 m/s | 4.3 |
| 1986 | 15.3°C | 9.5°C | 3.8°C | 23.1°C | -2.3°C | 93 mm | 81% | 1.5 m/s | 4.5 |
| 1985 | 17.9°C | 11.6°C | 5.4°C | 28.4°C | -5.6°C | 16 mm | 75% | 1.5 m/s | 5.2 |
| 1984 | 13.8°C | 8.3°C | 2.9°C | 22.3°C | -3.0°C | 110 mm | 84% | 1.4 m/s | 4.2 |
| 1983 🌧️ | 14.1°C | 8.7°C | 3.3°C | 23.9°C | -3.4°C | 208 mm | 82% | 1.8 m/s | — |
| 1982 ❄️ | 14.1°C | 7.4°C | 0.7°C | 23.5°C | -8.0°C | 113 mm | 74% | 1.9 m/s | — |
| 1981 | 17.6°C | 10.6°C | 3.5°C | 23.9°C | -4.0°C | 98 mm | 75% | 1.7 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 16.1°C with lows near 4°C (mean 10.1°C), based on 45 years of NASA POWER data.
April averages 92 mm of rainfall in Mechanicsburg, about average for rainfall. The wettest on record was 208 mm in 1983.
The hottest April reached 31.5°C in 2002. The coldest dipped to -8°C in 1982.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average April temperatures have risen by about 2°C. Daytime highs moved from 15.5°C to 17.4°C and overnight lows from 3.2°C to 5.2°C over the same span.
April is one of the cooler months of the year in Mechanicsburg and about average for rainfall, so plan for around 16.1°C daytime highs and 4°C at night.
Not quite — April is the 6th coolest month in Mechanicsburg, averaging 10.1°C.
For April in Mechanicsburg, pack warm layers and a jacket for chilly mornings, with typical highs of 16.1°C and lows of 4°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 78% — quite humid.
Average wind speed in April is 1.6 m/s. The windiest April on record averaged 1.9 m/s (1982).
The wettest April on record was 1983 with 208 mm. On average, April sees 92 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 Mechanicsburg 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.
