June is one of the warmer months of the year in Harrisburg, with average highs near 26.3°C and lows around 14.6°C (mean 20.5°C). It is a relatively wet time of year, averaging 107 mm of rainfall and 75% relative humidity across the period.
June is one of the warmer months of the year in Harrisburg. Across 45 years of records, the warmest June in Harrisburg was 2010 — when the month averaged 22.7°C — while the coldest was 1982 at 17.7°C. Typical June days reach 26.3°C with nights near 14.6°C. The long-term trend is warming, about 0.4°C per decade.
June is a relatively wet time of year in Harrisburg, averaging 107 mm of rainfall. The wettest June on record was 2006 with 252 mm, while the driest was 1988 at 30 mm.
Relative humidity in Harrisburg during June averages 75%. The most humid June was 1989 at 84%, and the least humid was 1999 at 60%.
June receives about 5.9 kWh/m²/day of solar energy in Harrisburg. The sunniest June was 1988 at 7 kWh/m²/day, and the cloudiest was 2003 at 4.8.
Average wind speed in Harrisburg during June is 0.4 m/s. The windiest Junes were 2018, 2022 and 2024, among others at 0.5 m/s, while the calmest were 2021, 2023 and 2025, among others at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 19.6°C | 20.2°C | 20.7°C | 20.9°C | 21.3°C | +1.7°C |
| Avg High | 25.5°C | 26.2°C | 26.4°C | 26.5°C | 27.3°C | +1.8°C |
| Avg Low | 13.7°C | 14.2°C | 15.0°C | 15.3°C | 15.3°C | +1.6°C |
| Avg Rain | 114 mm | 89 mm | 123 mm | 111 mm | 91 mm | -23 mm |
June temperatures in Harrisburg have risen by about 2.3°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 2.8°C (1986) to a record high of 36.6°C (1988).
Rainfall in June is a relatively wet time of year, averaging 107 mm, with a wettest year of 252 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.3°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
One of the best times to visit Harrisburg
June is one of the best times to visit Harrisburg. Expect days averaging 26.3°C and nights around 14.6°C (mean 20.5°C) — warmer than Harrisburg's yearly average — with higher rainfall (107 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 27.5°C | 22.1°C | 16.6°C | 35.2°C | 5.3°C | 125 mm | 80% | 0.4 m/s | 5.6 |
| 2024 | 28.3°C | 22.2°C | 16.0°C | 36.2°C | 9.1°C | 78 mm | 72% | 0.5 m/s | 6.5 |
| 2023 | 26.5°C | 20.0°C | 13.6°C | 34.0°C | 8.0°C | 92 mm | 66% | 0.4 m/s | 5.5 |
| 2022 | 26.8°C | 20.7°C | 14.6°C | 32.3°C | 8.6°C | 91 mm | 71% | 0.5 m/s | 6.4 |
| 2021 | 28.3°C | 22.2°C | 16.1°C | 36.4°C | 8.5°C | 72 mm | 72% | 0.4 m/s | 6 |
| 2020 | 26.1°C | 20.5°C | 14.9°C | 30.2°C | 5.2°C | 89 mm | 77% | 0.4 m/s | 6.6 |
| 2019 | 25.5°C | 20.0°C | 14.5°C | 34.2°C | 5.1°C | 124 mm | 80% | 0.4 m/s | 6.2 |
| 2018 | 25.4°C | 20.2°C | 15.1°C | 33.7°C | 9.8°C | 131 mm | 80% | 0.5 m/s | 5.8 |
| 2017 | 27.0°C | 21.2°C | 15.3°C | 34.5°C | 8.8°C | 80 mm | 72% | 0.5 m/s | 6.3 |
| 2016 | 27.2°C | 21.1°C | 15.1°C | 33.0°C | 6.7°C | 83 mm | 69% | 0.4 m/s | 6.4 |
| 2015 | 26.5°C | 21.2°C | 15.8°C | 32.4°C | 9.9°C | 199 mm | 79% | 0.4 m/s | 5.1 |
| 2014 | 25.7°C | 20.4°C | 15.1°C | 28.8°C | 9.6°C | 108 mm | 80% | 0.4 m/s | 6.3 |
| 2013 | 26.4°C | 20.9°C | 15.4°C | 32.7°C | 8.6°C | 150 mm | 77% | 0.4 m/s | 5.7 |
| 2012 | 26.2°C | 20.2°C | 14.2°C | 34.7°C | 9.1°C | 90 mm | 73% | 0.5 m/s | 6.4 |
| 2011 | 25.9°C | 20.7°C | 15.5°C | 29.4°C | 8.2°C | 85 mm | 81% | 0.4 m/s | 6.1 |
| 2010 🔥 | 28.8°C | 22.7°C | 16.5°C | 34.7°C | 9.6°C | 64 mm | 70% | 0.5 m/s | 6.2 |
| 2009 | 24.6°C | 19.6°C | 14.7°C | 31.1°C | 6.2°C | 131 mm | 81% | 0.4 m/s | 5.2 |
| 2008 | 26.9°C | 21.4°C | 15.9°C | 31.6°C | 9.1°C | 77 mm | 79% | 0.4 m/s | 6.4 |
| 2007 | 28.0°C | 21.5°C | 14.9°C | 35.1°C | 9.6°C | 92 mm | 69% | 0.4 m/s | 6.5 |
| 2006 🌧️ | 25.6°C | 20.3°C | 14.9°C | 34.2°C | 5.8°C | 252 mm | 76% | 0.4 m/s | 5.6 |
| 2005 | 28.3°C | 22.3°C | 16.4°C | 35.2°C | 10.4°C | 63 mm | 74% | 0.4 m/s | 6 |
| 2004 | 24.5°C | 19.1°C | 13.8°C | 30.3°C | 8.0°C | 119 mm | 81% | 0.4 m/s | 5.8 |
| 2003 | 23.8°C | 18.7°C | 13.6°C | 33.4°C | 5.0°C | 160 mm | 83% | 0.4 m/s | 4.8 |
| 2002 | 27.5°C | 21.4°C | 15.4°C | 34.7°C | 9.3°C | 96 mm | 71% | 0.4 m/s | 6 |
| 2001 | 28.5°C | 21.8°C | 15.0°C | 34.3°C | 6.9°C | 105 mm | 66% | 0.4 m/s | 6.3 |
| 2000 | 26.4°C | 20.7°C | 14.9°C | 31.1°C | 8.3°C | 134 mm | 78% | 0.5 m/s | 5.1 |
| 1999 | 28.7°C | 21.8°C | 14.9°C | 35.3°C | 9.2°C | 61 mm | 60% | 0.5 m/s | 6.1 |
| 1998 | 24.1°C | 19.2°C | 14.2°C | 29.6°C | 5.2°C | 131 mm | 81% | 0.5 m/s | 5.2 |
| 1997 | 26.4°C | 20.3°C | 14.1°C | 33.9°C | 8.0°C | 70 mm | 71% | 0.4 m/s | 6.1 |
| 1996 | 25.5°C | 20.2°C | 14.8°C | 31.0°C | 7.3°C | 156 mm | 82% | 0.4 m/s | 5.8 |
| 1995 | 26.5°C | 20.5°C | 14.5°C | 34.7°C | 9.0°C | 117 mm | 75% | 0.4 m/s | 5.3 |
| 1994 | 27.2°C | 21.1°C | 15.1°C | 33.4°C | 6.0°C | 113 mm | 76% | 0.4 m/s | 5.9 |
| 1993 | 25.2°C | 19.2°C | 13.1°C | 30.0°C | 4.1°C | 73 mm | 76% | 0.4 m/s | 6.3 |
| 1992 | 24.4°C | 18.4°C | 12.4°C | 30.5°C | 7.7°C | 67 mm | 74% | 0.4 m/s | 6.1 |
| 1991 | 28.7°C | 21.9°C | 15.0°C | 35.6°C | 8.6°C | 31 mm | 62% | 0.4 m/s | 6.2 |
| 1990 | 25.4°C | 19.6°C | 13.8°C | 31.3°C | 5.1°C | 67 mm | 77% | 0.5 m/s | 5.7 |
| 1989 | 24.7°C | 20.1°C | 15.5°C | 29.3°C | 8.9°C | 152 mm | 84% | 0.4 m/s | 5 |
| 1988 | 26.8°C | 19.7°C | 12.6°C | 36.6°C | 4.3°C | 30 mm | 62% | 0.5 m/s | 7 |
| 1987 | 27.4°C | 21.4°C | 15.5°C | 31.8°C | 7.4°C | 76 mm | 73% | 0.4 m/s | 5.9 |
| 1986 | 26.2°C | 19.7°C | 13.2°C | 31.6°C | 2.8°C | 78 mm | 71% | 0.5 m/s | 6.5 |
| 1985 | 24.7°C | 18.4°C | 12.1°C | 29.6°C | 8.3°C | 83 mm | 72% | 0.5 m/s | 5.5 |
| 1984 | 25.5°C | 19.8°C | 14.2°C | 30.5°C | 6.3°C | 155 mm | 81% | 0.4 m/s | 5.6 |
| 1983 | 25.2°C | 19.4°C | 13.5°C | 30.6°C | 5.4°C | 126 mm | 79% | 0.4 m/s | — |
| 1982 ❄️ | 22.8°C | 17.7°C | 12.6°C | 28.2°C | 8.4°C | 185 mm | 82% | 0.4 m/s | — |
| 1981 | 26.5°C | 20.4°C | 14.3°C | 31.8°C | 7.8°C | 145 mm | 74% | 0.4 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 26.3°C with lows near 14.6°C (mean 20.5°C), based on 45 years of NASA POWER data.
June averages 107 mm of rainfall in Harrisburg, a relatively wet time of year. The wettest on record was 252 mm in 2006.
The hottest June reached 36.6°C in 1988. The coldest dipped to 2.8°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 2.3°C. Daytime highs moved from 24.9°C to 27.5°C and overnight lows from 13.3°C to 15.4°C over the same span.
June is one of the warmer months of the year in Harrisburg and a relatively wet time of year, so plan for around 26.3°C daytime highs and 14.6°C at night.
Not quite — June is the 10th coolest month in Harrisburg, averaging 20.5°C.
For June in Harrisburg, pack light layers you can adjust through the day, with typical highs of 26.3°C and lows of 14.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 75% — moderately humid.
Average wind speed in June is 0.4 m/s. The windiest June on record averaged 0.5 m/s (1985).
The wettest June on record was 2006 with 252 mm. On average, June sees 107 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 Harrisburg behaves each June, 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 June specifically, along with year-by-year records and how the month has changed over the decades.
