April is one of the cooler months of the year in Chambersburg, with average highs near 15.8°C and lows around 3.5°C (mean 9.7°C). It is about average for rainfall, averaging 91 mm of rainfall and 78% relative humidity across the period.
April is one of the cooler months of the year in Chambersburg. Across 45 years of records, the warmest April in Chambersburg was 2017 — when the month averaged 13.2°C — while the coldest was 1982 at 6.9°C. Typical April days reach 15.8°C with nights near 3.5°C. The long-term trend is warming, about 0.4°C per decade.
April is about average for rainfall in Chambersburg, averaging 91 mm of rainfall. The wettest April on record was 2011 with 209 mm, while the driest was 1985 at 17 mm.
Relative humidity in Chambersburg during April averages 78%. The most humid April was 2011 at 85%, and the least humid were 2016 and 2025 at 73%.
April receives about 4.8 kWh/m²/day of solar energy in Chambersburg. The sunniest Aprils were 1997 and 2010 at 5.5 kWh/m²/day, and the cloudiest was 2011 at 4.1.
Average wind speed in Chambersburg during April is 1.2 m/s. The windiest April was 1982 at 1.5 m/s, while the calmest were 1984 and 2008 at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.8°C | 9.2°C | 10.0°C | 10.2°C | 10.4°C | +1.6°C |
| Avg High | 14.9°C | 15.4°C | 16.1°C | 16.4°C | 16.5°C | +1.6°C |
| Avg Low | 2.7°C | 3.0°C | 3.9°C | 4.0°C | 4.3°C | +1.6°C |
| Avg Rain | 89 mm | 87 mm | 97 mm | 90 mm | 97 mm | +9 mm |
April temperatures in Chambersburg have risen by about 1.8°C between 1981–1985 and 2021–2025.
April has ranged from a record low of -9.3°C (1982) to a record high of 30.6°C (2002).
Rainfall in April is about average for rainfall, averaging 91 mm, with a wettest year of 209 mm.
A good time to visit Chambersburg
April is a good time to visit Chambersburg, with days averaging 15.8°C and nights around 3.5°C (mean 9.7°C, cooler than Chambersburg's yearly average) and higher rainfall. August and June 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 | 17.8°C | 11.5°C | 5.2°C | 27.4°C | -4.8°C | 71 mm | 73% | 1.3 m/s | 4.8 |
| 2024 | 17.1°C | 11.5°C | 5.9°C | 29.3°C | -1.5°C | 131 mm | 81% | 1.2 m/s | 4.7 |
| 2023 | 18.6°C | 11.9°C | 5.1°C | 27.5°C | -1.4°C | 107 mm | 74% | 1.1 m/s | 5.3 |
| 2022 | 15.2°C | 8.8°C | 2.5°C | 26.0°C | -3.9°C | 73 mm | 74% | 1.2 m/s | 4.9 |
| 2021 | 16.6°C | 10.4°C | 4.1°C | 26.4°C | -5.0°C | 63 mm | 76% | 1.1 m/s | 5 |
| 2020 | 13.9°C | 8.3°C | 2.7°C | 22.0°C | -3.5°C | 138 mm | 77% | 1.4 m/s | 4.5 |
| 2019 | 17.3°C | 11.4°C | 5.6°C | 23.5°C | -4.2°C | 108 mm | 81% | 1.2 m/s | 4.8 |
| 2018 | 13.2°C | 7.3°C | 1.3°C | 25.5°C | -5.5°C | 110 mm | 76% | 1.3 m/s | 4.8 |
| 2017 🔥 | 19.3°C | 13.2°C | 7.1°C | 28.2°C | -2.8°C | 74 mm | 79% | 1.1 m/s | 4.7 |
| 2016 | 15.8°C | 9.3°C | 2.8°C | 25.5°C | -5.9°C | 44 mm | 73% | 1.2 m/s | 5.1 |
| 2015 | 16.3°C | 10.0°C | 3.7°C | 24.5°C | -4.2°C | 76 mm | 76% | 1.2 m/s | 5 |
| 2014 | 14.9°C | 8.5°C | 2.2°C | 24.1°C | -5.5°C | 117 mm | 80% | 1.2 m/s | 4.9 |
| 2013 | 16.3°C | 10.1°C | 3.9°C | 25.9°C | -5.2°C | 54 mm | 77% | 1.2 m/s | 5.2 |
| 2012 | 15.9°C | 9.6°C | 3.3°C | 27.1°C | -1.6°C | 56 mm | 74% | 1.1 m/s | 5.4 |
| 2011 🌧️ | 16.2°C | 10.7°C | 5.3°C | 25.9°C | -1.9°C | 209 mm | 85% | 1.3 m/s | 4.1 |
| 2010 | 18.5°C | 11.8°C | 5.0°C | 27.2°C | -0.2°C | 51 mm | 77% | 1.1 m/s | 5.5 |
| 2009 | 16.0°C | 9.9°C | 3.9°C | 29.9°C | -3.5°C | 103 mm | 78% | 1.3 m/s | 4.7 |
| 2008 | 16.8°C | 11.0°C | 5.2°C | 26.6°C | -2.4°C | 135 mm | 80% | 1 m/s | 4.6 |
| 2007 | 13.5°C | 8.0°C | 2.5°C | 25.0°C | -3.8°C | 85 mm | 78% | 1.3 m/s | 4.3 |
| 2006 | 17.8°C | 11.0°C | 4.2°C | 25.9°C | -3.5°C | 86 mm | 75% | 1.1 m/s | 5.4 |
| 2005 | 16.5°C | 10.1°C | 3.7°C | 25.5°C | -1.5°C | 82 mm | 78% | 1.2 m/s | 5.2 |
| 2004 | 15.3°C | 9.9°C | 4.5°C | 25.8°C | -4.5°C | 154 mm | 81% | 1.2 m/s | 4.7 |
| 2003 | 15.0°C | 9.1°C | 3.1°C | 25.4°C | -5.2°C | 70 mm | 83% | 1.1 m/s | 4.6 |
| 2002 | 17.7°C | 11.1°C | 4.6°C | 30.6°C | -5.0°C | 85 mm | 74% | 1.2 m/s | 5.1 |
| 2001 | 17.0°C | 10.4°C | 3.9°C | 28.4°C | -4.1°C | 61 mm | 76% | 1.1 m/s | 4.9 |
| 2000 | 15.3°C | 9.5°C | 3.6°C | 24.8°C | -3.7°C | 106 mm | 79% | 1.3 m/s | 4.4 |
| 1999 | 16.3°C | 9.7°C | 3.2°C | 25.3°C | -1.7°C | 101 mm | 76% | 1.1 m/s | 4.8 |
| 1998 | 15.9°C | 9.8°C | 3.7°C | 21.7°C | -2.7°C | 136 mm | 79% | 1.1 m/s | 5.1 |
| 1997 | 14.2°C | 7.9°C | 1.5°C | 21.6°C | -4.8°C | 29 mm | 74% | 1.3 m/s | 5.5 |
| 1996 | 14.4°C | 8.3°C | 2.2°C | 24.3°C | -4.2°C | 89 mm | 82% | 1.3 m/s | 4.8 |
| 1995 | 14.6°C | 8.1°C | 1.5°C | 25.2°C | -5.4°C | 55 mm | 75% | 1.2 m/s | 4.8 |
| 1994 | 17.6°C | 10.9°C | 4.3°C | 26.4°C | -4.6°C | 74 mm | 81% | 1.2 m/s | 5.4 |
| 1993 | 14.1°C | 8.2°C | 2.2°C | 21.8°C | -3.7°C | 182 mm | 82% | 1.3 m/s | 4.5 |
| 1992 | 14.3°C | 8.8°C | 3.3°C | 21.7°C | -4.4°C | 71 mm | 79% | 1.1 m/s | 4.5 |
| 1991 | 16.2°C | 10.4°C | 4.7°C | 25.2°C | -4.3°C | 63 mm | 82% | 1.2 m/s | 4.6 |
| 1990 | 16.1°C | 9.8°C | 3.5°C | 28.9°C | -4.9°C | 69 mm | 77% | 1.2 m/s | 4.6 |
| 1989 | 14.6°C | 8.1°C | 1.7°C | 23.4°C | -4.7°C | 37 mm | 76% | 1.1 m/s | 4.9 |
| 1988 | 14.3°C | 8.1°C | 2.0°C | 21.8°C | -3.6°C | 60 mm | 78% | 1.3 m/s | 5 |
| 1987 | 14.2°C | 9.0°C | 3.7°C | 25.0°C | -4.5°C | 112 mm | 83% | 1.1 m/s | 4.2 |
| 1986 | 15.1°C | 9.2°C | 3.3°C | 23.5°C | -2.7°C | 83 mm | 81% | 1.2 m/s | 4.6 |
| 1985 | 17.6°C | 11.4°C | 5.2°C | 28.2°C | -6.1°C | 17 mm | 76% | 1.1 m/s | 5.2 |
| 1984 | 13.5°C | 8.0°C | 2.5°C | 22.5°C | -3.6°C | 112 mm | 83% | 1 m/s | 4.2 |
| 1983 | 14.0°C | 8.4°C | 2.7°C | 23.4°C | -4.4°C | 182 mm | 81% | 1.4 m/s | — |
| 1982 ❄️ | 13.7°C | 6.9°C | 0.2°C | 23.4°C | -9.3°C | 93 mm | 74% | 1.5 m/s | — |
| 1981 | 17.4°C | 10.2°C | 3.1°C | 24.1°C | -4.6°C | 102 mm | 76% | 1.3 m/s | — |
Actual recorded April data for each year, 1981–2025 — sourced from NASA POWER.
The average high in April is around 15.8°C with lows near 3.5°C (mean 9.7°C), based on 45 years of NASA POWER data.
April averages 91 mm of rainfall in Chambersburg, about average for rainfall. The wettest on record was 209 mm in 2011.
The hottest April reached 30.6°C in 2002. The coldest dipped to -9.3°C in 1982.
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 15.2°C to 17.1°C and overnight lows from 2.7°C to 4.6°C over the same span.
April is one of the cooler months of the year in Chambersburg and about average for rainfall, so plan for around 15.8°C daytime highs and 3.5°C at night.
Not quite — April is the 6th coolest month in Chambersburg, averaging 9.7°C.
For April in Chambersburg, pack warm layers and a jacket for chilly mornings, with typical highs of 15.8°C and lows of 3.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in April averages 78% — quite humid.
Average wind speed in April is 1.2 m/s. The windiest April on record averaged 1.5 m/s (1982).
The wettest April on record was 2011 with 209 mm. On average, April sees 91 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 Chambersburg 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.
