July is one of the warmer months of the year in Mechanicsburg, with average highs near 30.1°C and lows around 18.5°C (mean 24.3°C). It is a relatively wet time of year, averaging 109 mm of rainfall and 69% relative humidity across the period.
July is one of the warmer months of the year in Mechanicsburg. Across 45 years of records, the warmest July in Mechanicsburg was 2020 — when the month averaged 27.1°C — while the coldest was 1984 at 20.9°C. Typical July days reach 30.1°C with nights near 18.5°C. The long-term trend is warming, about 0.4°C per decade.
July is a relatively wet time of year in Mechanicsburg, averaging 109 mm of rainfall. The wettest July on record was 2018 with 260 mm, while the driest was 1983 at 29 mm.
Relative humidity in Mechanicsburg during July averages 69%. The most humid July was 1989 at 82%, and the least humid was 1999 at 53%.
July receives about 5.8 kWh/m²/day of solar energy in Mechanicsburg. The sunniest July was 2010 at 6.6 kWh/m²/day, and the cloudiest was 2004 at 4.9.
Average wind speed in Mechanicsburg during July is 1 m/s. The windiest Julys were 1990 and 1992 at 1.2 m/s, while the calmest were 2019, 2023 and 2025, among others at 0.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.7°C | 24.1°C | 23.4°C | 24.8°C | 25.9°C | +2.2°C |
| Avg High | 29.6°C | 30.0°C | 29.1°C | 30.4°C | 31.9°C | +2.3°C |
| Avg Low | 17.8°C | 18.2°C | 17.8°C | 19.2°C | 20.1°C | +2.3°C |
| Avg Rain | 105 mm | 101 mm | 104 mm | 127 mm | 108 mm | +3 mm |
July temperatures in Mechanicsburg have risen by about 2.8°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 9.2°C (1988) to a record high of 39°C (2012).
Rainfall in July is a relatively wet time of year, averaging 109 mm, with a wettest year of 260 mm.
One of the best times to visit Mechanicsburg
July is one of the best times to visit Mechanicsburg. Expect days averaging 30.1°C and nights around 18.5°C (mean 24.3°C) — warmer than Mechanicsburg's yearly average — with higher rainfall (109 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 | 31.6°C | 26.0°C | 20.3°C | 36.6°C | 16.2°C | 132 mm | 71% | 0.9 m/s | 6 |
| 2024 | 32.3°C | 26.3°C | 20.4°C | 38.4°C | 14.2°C | 88 mm | 64% | 1 m/s | 6.1 |
| 2023 | 31.4°C | 25.6°C | 19.9°C | 36.0°C | 16.6°C | 130 mm | 69% | 0.9 m/s | 5.8 |
| 2022 | 31.8°C | 25.7°C | 19.7°C | 36.8°C | 15.5°C | 90 mm | 64% | 1 m/s | 5.9 |
| 2021 | 30.7°C | 24.9°C | 19.1°C | 35.3°C | 13.5°C | 127 mm | 68% | 1 m/s | 5.7 |
| 2020 🔥 | 33.4°C | 27.1°C | 20.9°C | 37.2°C | 17.8°C | 80 mm | 63% | 1 m/s | 6.2 |
| 2019 | 30.4°C | 25.0°C | 19.7°C | 35.1°C | 14.3°C | 121 mm | 74% | 0.9 m/s | 6.1 |
| 2018 🌧️ | 28.6°C | 23.4°C | 18.2°C | 33.8°C | 12.6°C | 260 mm | 76% | 1 m/s | 5.8 |
| 2017 | 30.2°C | 24.6°C | 19.1°C | 35.0°C | 13.1°C | 164 mm | 71% | 1 m/s | 5.7 |
| 2016 | 32.2°C | 26.0°C | 19.8°C | 36.6°C | 14.0°C | 104 mm | 63% | 1 m/s | 6 |
| 2015 | 28.8°C | 23.4°C | 18.0°C | 33.6°C | 12.2°C | 89 mm | 74% | 0.9 m/s | 6 |
| 2014 | 28.0°C | 22.6°C | 17.1°C | 32.7°C | 11.9°C | 112 mm | 74% | 1 m/s | 5.9 |
| 2013 | 29.5°C | 24.7°C | 19.9°C | 35.6°C | 13.1°C | 108 mm | 75% | 1 m/s | 5.7 |
| 2012 | 32.4°C | 26.5°C | 20.5°C | 39.0°C | 16.5°C | 112 mm | 64% | 1 m/s | 5.8 |
| 2011 | 31.8°C | 25.9°C | 20.0°C | 38.1°C | 14.0°C | 72 mm | 66% | 0.9 m/s | 6.4 |
| 2010 | 32.2°C | 25.9°C | 19.6°C | 38.7°C | 12.1°C | 131 mm | 61% | 1 m/s | 6.6 |
| 2009 | 27.4°C | 21.9°C | 16.4°C | 32.1°C | 11.6°C | 105 mm | 71% | 1 m/s | 5.7 |
| 2008 | 29.6°C | 24.1°C | 18.5°C | 34.5°C | 14.3°C | 110 mm | 70% | 0.9 m/s | 6 |
| 2007 | 30.0°C | 23.8°C | 17.7°C | 35.7°C | 10.8°C | 85 mm | 62% | 1.1 m/s | 6 |
| 2006 | 29.0°C | 24.0°C | 19.0°C | 35.0°C | 13.2°C | 92 mm | 79% | 1 m/s | 5.9 |
| 2005 | 30.0°C | 24.6°C | 19.1°C | 34.2°C | 15.0°C | 160 mm | 72% | 0.9 m/s | 5.8 |
| 2004 | 27.5°C | 22.6°C | 17.7°C | 29.9°C | 14.8°C | 192 mm | 80% | 1 m/s | 4.9 |
| 2003 | 27.3°C | 22.5°C | 17.7°C | 30.0°C | 13.5°C | 105 mm | 80% | 1.1 m/s | 5.8 |
| 2002 | 32.3°C | 25.8°C | 19.2°C | 37.5°C | 11.9°C | 45 mm | 56% | 1.1 m/s | 6.1 |
| 2001 | 29.8°C | 23.1°C | 16.3°C | 36.1°C | 10.3°C | 55 mm | 57% | 1.1 m/s | 6.2 |
| 2000 | 27.7°C | 21.9°C | 16.0°C | 32.3°C | 11.2°C | 95 mm | 67% | 1 m/s | 5.3 |
| 1999 | 33.8°C | 26.8°C | 19.8°C | 38.8°C | 12.7°C | 42 mm | 53% | 1.1 m/s | 6.1 |
| 1998 | 28.3°C | 22.6°C | 16.9°C | 32.7°C | 11.9°C | 75 mm | 71% | 1 m/s | 5.9 |
| 1997 | 30.7°C | 24.0°C | 17.4°C | 37.0°C | 12.0°C | 87 mm | 58% | 1.1 m/s | 6.1 |
| 1996 | 26.1°C | 21.2°C | 16.2°C | 29.4°C | 10.7°C | 180 mm | 81% | 1.1 m/s | 5.4 |
| 1995 | 30.1°C | 24.5°C | 18.9°C | 35.9°C | 11.2°C | 107 mm | 70% | 1 m/s | 5.7 |
| 1994 | 29.5°C | 24.3°C | 19.0°C | 34.1°C | 14.9°C | 150 mm | 73% | 0.9 m/s | 5.5 |
| 1993 | 30.9°C | 24.9°C | 19.0°C | 35.7°C | 13.9°C | 80 mm | 64% | 1.1 m/s | 5.7 |
| 1992 | 28.9°C | 23.5°C | 18.1°C | 34.8°C | 13.4°C | 121 mm | 71% | 1.2 m/s | 5.6 |
| 1991 | 32.1°C | 25.6°C | 19.2°C | 38.2°C | 14.8°C | 67 mm | 58% | 1.1 m/s | 5.7 |
| 1990 | 29.7°C | 23.8°C | 17.8°C | 36.3°C | 13.3°C | 106 mm | 71% | 1.2 m/s | 5.3 |
| 1989 | 26.8°C | 22.3°C | 17.8°C | 30.8°C | 12.7°C | 176 mm | 82% | 1 m/s | 5.3 |
| 1988 | 32.5°C | 25.9°C | 19.3°C | 38.4°C | 9.2°C | 138 mm | 60% | 1 m/s | 5.9 |
| 1987 | 31.9°C | 25.7°C | 19.5°C | 37.3°C | 11.8°C | 72 mm | 63% | 0.9 m/s | 6.1 |
| 1986 | 31.3°C | 25.0°C | 18.7°C | 36.4°C | 11.7°C | 109 mm | 64% | 1.1 m/s | 5.8 |
| 1985 | 29.8°C | 23.6°C | 17.3°C | 33.5°C | 12.3°C | 130 mm | 65% | 1.1 m/s | 5.8 |
| 1984 ❄️ | 25.8°C | 20.9°C | 16.0°C | 30.3°C | 9.7°C | 129 mm | 81% | 1.1 m/s | 5.1 |
| 1983 | 30.0°C | 23.6°C | 17.2°C | 35.5°C | 9.9°C | 29 mm | 68% | 1 m/s | — |
| 1982 | 28.7°C | 22.9°C | 17.1°C | 35.1°C | 9.5°C | 66 mm | 72% | 1 m/s | — |
| 1981 | 29.8°C | 23.6°C | 17.3°C | 34.6°C | 11.5°C | 100 mm | 65% | 1.1 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 30.1°C with lows near 18.5°C (mean 24.3°C), based on 45 years of NASA POWER data.
July averages 109 mm of rainfall in Mechanicsburg, a relatively wet time of year. The wettest on record was 260 mm in 2018.
The hottest July reached 39°C in 2012. The coldest dipped to 9.2°C in 1988.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 2.8°C. Daytime highs moved from 28.8°C to 31.6°C and overnight lows from 17°C to 19.9°C over the same span.
July is one of the warmer months of the year in Mechanicsburg and a relatively wet time of year, so plan for around 30.1°C daytime highs and 18.5°C at night.
Not quite — July is the 12th coolest month in Mechanicsburg, averaging 24.3°C.
For July in Mechanicsburg, pack light, breathable clothing and sun protection, with typical highs of 30.1°C and lows of 18.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 69% — moderately humid.
Average wind speed in July is 1 m/s. The windiest July on record averaged 1.2 m/s (1990).
The wettest July on record was 2018 with 260 mm. On average, July sees 109 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 July, 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 July specifically, along with year-by-year records and how the month has changed over the decades.
