June is one of the warmer months of the year in Mechanicsburg, with average highs near 26.7°C and lows around 15.4°C (mean 21.1°C). It is a relatively wet time of year, averaging 103 mm of rainfall and 74% relative humidity across the period.
June is one of the warmer months of the year in Mechanicsburg. Across 45 years of records, the warmest June in Mechanicsburg was 2010 — when the month averaged 23.1°C — while the coldest was 1982 at 18.4°C. Typical June days reach 26.7°C with nights near 15.4°C. The long-term trend is warming, about 0.4°C per decade.
June is a relatively wet time of year in Mechanicsburg, averaging 103 mm of rainfall. The wettest June on record was 2006 with 245 mm, while the driest was 1988 at 23 mm.
Relative humidity in Mechanicsburg during June averages 74%. The most humid Junes were 1989 and 2003 at 83%, and the least humid was 1999 at 61%.
June receives about 5.9 kWh/m²/day of solar energy in Mechanicsburg. The sunniest June was 1988 at 7 kWh/m²/day, and the cloudiest was 2003 at 4.9.
Average wind speed in Mechanicsburg during June is 1.1 m/s. The windiest June was 2000 at 1.3 m/s, while the calmest was 1983 at 0.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.3°C | 20.7°C | 21.2°C | 21.4°C | 21.9°C | +1.6°C |
| Avg High | 26.1°C | 26.6°C | 26.8°C | 26.8°C | 27.8°C | +1.7°C |
| Avg Low | 14.5°C | 14.9°C | 15.7°C | 16.0°C | 15.9°C | +1.4°C |
| Avg Rain | 102 mm | 83 mm | 122 mm | 113 mm | 91 mm | -11 mm |
June temperatures in Mechanicsburg have risen by about 2.2°C between 1981–1985 and 2021–2025.
June has ranged from a record low of 4°C (1986) to a record high of 37.1°C (2024).
Rainfall in June is a relatively wet time of year, averaging 103 mm, with a wettest year of 245 mm.
One of the best times to visit Mechanicsburg
June is one of the best times to visit Mechanicsburg. Expect days averaging 26.7°C and nights around 15.4°C (mean 21.1°C) — warmer than Mechanicsburg's yearly average — with higher rainfall (103 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 | 28.1°C | 22.6°C | 17.1°C | 35.6°C | 5.7°C | 114 mm | 79% | 1 m/s | 5.5 |
| 2024 | 29.0°C | 22.9°C | 16.8°C | 37.1°C | 9.8°C | 97 mm | 69% | 1.2 m/s | 6.5 |
| 2023 | 27.2°C | 20.7°C | 14.2°C | 34.5°C | 9.7°C | 83 mm | 64% | 1.2 m/s | 5.6 |
| 2022 | 27.6°C | 21.5°C | 15.4°C | 32.3°C | 9.6°C | 85 mm | 68% | 1.2 m/s | 6.5 |
| 2021 | 28.2°C | 22.4°C | 16.6°C | 36.6°C | 9.0°C | 81 mm | 73% | 1.1 m/s | 6.1 |
| 2020 | 26.7°C | 21.2°C | 15.6°C | 31.4°C | 6.1°C | 87 mm | 75% | 1.1 m/s | 6.5 |
| 2019 | 25.9°C | 20.6°C | 15.3°C | 33.2°C | 6.0°C | 118 mm | 79% | 1.2 m/s | 6.1 |
| 2018 | 25.6°C | 20.6°C | 15.6°C | 32.8°C | 9.6°C | 137 mm | 80% | 1.1 m/s | 5.6 |
| 2017 | 28.0°C | 22.1°C | 16.2°C | 35.1°C | 9.6°C | 70 mm | 68% | 1.2 m/s | 6.2 |
| 2016 | 27.1°C | 21.3°C | 15.6°C | 31.7°C | 7.7°C | 89 mm | 71% | 1.1 m/s | 6.4 |
| 2015 | 26.6°C | 21.7°C | 16.8°C | 31.7°C | 12.1°C | 221 mm | 80% | 1.2 m/s | 5 |
| 2014 | 25.7°C | 20.7°C | 15.7°C | 29.4°C | 10.3°C | 110 mm | 81% | 1.1 m/s | 6.1 |
| 2013 | 26.6°C | 21.3°C | 16.1°C | 32.4°C | 9.7°C | 164 mm | 78% | 1.1 m/s | 5.6 |
| 2012 | 26.9°C | 21.0°C | 15.1°C | 35.4°C | 10.1°C | 93 mm | 71% | 1.1 m/s | 6.4 |
| 2011 | 26.5°C | 21.3°C | 16.1°C | 31.0°C | 9.3°C | 71 mm | 79% | 1 m/s | 6 |
| 2010 🔥 | 29.0°C | 23.1°C | 17.3°C | 35.5°C | 10.2°C | 61 mm | 70% | 1.2 m/s | 6.1 |
| 2009 | 25.0°C | 20.2°C | 15.4°C | 31.3°C | 7.2°C | 136 mm | 81% | 1.1 m/s | 5.3 |
| 2008 | 27.3°C | 21.9°C | 16.5°C | 32.2°C | 9.8°C | 72 mm | 78% | 1 m/s | 6.3 |
| 2007 | 28.0°C | 21.8°C | 15.7°C | 33.8°C | 10.6°C | 93 mm | 69% | 1 m/s | 6.5 |
| 2006 🌧️ | 26.4°C | 21.1°C | 15.7°C | 34.4°C | 6.7°C | 245 mm | 73% | 1.1 m/s | 5.7 |
| 2005 | 28.4°C | 22.6°C | 16.8°C | 34.4°C | 10.4°C | 67 mm | 74% | 1 m/s | 6.1 |
| 2004 | 24.9°C | 19.8°C | 14.7°C | 30.5°C | 8.8°C | 134 mm | 80% | 1 m/s | 5.9 |
| 2003 | 24.1°C | 19.1°C | 14.2°C | 31.8°C | 5.6°C | 175 mm | 83% | 1.1 m/s | 4.9 |
| 2002 | 28.6°C | 22.3°C | 16.1°C | 35.7°C | 11.0°C | 80 mm | 66% | 1.1 m/s | 6.1 |
| 2001 | 28.5°C | 22.1°C | 15.8°C | 33.9°C | 7.3°C | 99 mm | 67% | 1.1 m/s | 6.2 |
| 2000 | 26.9°C | 21.3°C | 15.7°C | 31.8°C | 8.5°C | 116 mm | 76% | 1.3 m/s | 5.1 |
| 1999 | 28.7°C | 22.0°C | 15.3°C | 35.4°C | 10.3°C | 55 mm | 61% | 1.2 m/s | 5.9 |
| 1998 | 24.6°C | 19.7°C | 14.8°C | 30.3°C | 6.2°C | 127 mm | 81% | 1.2 m/s | 5.1 |
| 1997 | 26.7°C | 20.7°C | 14.8°C | 34.9°C | 7.8°C | 63 mm | 69% | 1.1 m/s | 6.1 |
| 1996 | 25.8°C | 20.6°C | 15.4°C | 30.6°C | 7.4°C | 162 mm | 82% | 1.1 m/s | 5.8 |
| 1995 | 26.9°C | 21.0°C | 15.1°C | 34.1°C | 10.3°C | 103 mm | 73% | 1.1 m/s | 5.3 |
| 1994 | 27.8°C | 21.9°C | 16.0°C | 33.6°C | 6.8°C | 84 mm | 74% | 1.1 m/s | 6 |
| 1993 | 25.6°C | 19.8°C | 13.9°C | 30.4°C | 4.8°C | 69 mm | 76% | 1.1 m/s | 6 |
| 1992 | 24.7°C | 18.9°C | 13.1°C | 30.0°C | 7.8°C | 71 mm | 74% | 1.2 m/s | 6 |
| 1991 | 28.9°C | 22.4°C | 15.9°C | 35.5°C | 9.5°C | 33 mm | 62% | 1 m/s | 6.1 |
| 1990 | 25.8°C | 20.1°C | 14.4°C | 32.5°C | 5.9°C | 61 mm | 76% | 1.2 m/s | 5.7 |
| 1989 | 25.0°C | 20.6°C | 16.2°C | 29.0°C | 9.8°C | 146 mm | 83% | 1.1 m/s | 5.3 |
| 1988 | 26.9°C | 20.1°C | 13.4°C | 36.0°C | 5.5°C | 23 mm | 63% | 1.2 m/s | 7 |
| 1987 | 27.6°C | 21.7°C | 15.8°C | 32.4°C | 8.4°C | 75 mm | 73% | 1.2 m/s | 5.9 |
| 1986 | 27.7°C | 21.0°C | 14.4°C | 33.3°C | 4.0°C | 58 mm | 65% | 1.2 m/s | 6.4 |
| 1985 | 25.6°C | 19.4°C | 13.1°C | 30.7°C | 8.8°C | 69 mm | 69% | 1.2 m/s | 5.8 |
| 1984 | 25.8°C | 20.4°C | 14.9°C | 30.9°C | 6.3°C | 133 mm | 81% | 1.1 m/s | 5.7 |
| 1983 | 25.2°C | 19.7°C | 14.2°C | 30.2°C | 7.1°C | 114 mm | 79% | 0.9 m/s | — |
| 1982 ❄️ | 23.5°C | 18.4°C | 13.3°C | 28.4°C | 9.0°C | 173 mm | 81% | 1.1 m/s | — |
| 1981 | 27.4°C | 21.3°C | 15.2°C | 32.8°C | 9.4°C | 128 mm | 72% | 1.2 m/s | — |
Actual recorded June data for each year, 1981–2025 — sourced from NASA POWER.
The average high in June is around 26.7°C with lows near 15.4°C (mean 21.1°C), based on 45 years of NASA POWER data.
June averages 103 mm of rainfall in Mechanicsburg, a relatively wet time of year. The wettest on record was 245 mm in 2006.
The hottest June reached 37.1°C in 2024. The coldest dipped to 4°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average June temperatures have risen by about 2.2°C. Daytime highs moved from 25.5°C to 28°C and overnight lows from 14.1°C to 16°C over the same span.
June is one of the warmer months of the year in Mechanicsburg and a relatively wet time of year, so plan for around 26.7°C daytime highs and 15.4°C at night.
Not quite — June is the 10th coolest month in Mechanicsburg, averaging 21.1°C.
For June in Mechanicsburg, pack light layers you can adjust through the day, with typical highs of 26.7°C and lows of 15.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in June averages 74% — moderately humid.
Average wind speed in June is 1.1 m/s. The windiest June on record averaged 1.3 m/s (2000).
The wettest June on record was 2006 with 245 mm. On average, June sees 103 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 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.
