July is one of the warmer months of the year in Johnstown, with average highs near 27.2°C and lows around 15.8°C (mean 21.5°C). It is a relatively wet time of year, averaging 99 mm of rainfall and 74% relative humidity across the period.
July is one of the warmer months of the year in Johnstown. Across 45 years of records, the warmest July in Johnstown was 2020 — when the month averaged 24.6°C — while the coldest was 1984 at 18.5°C. Typical July days reach 27.2°C with nights near 15.8°C. The long-term trend is warming, about 0.4°C per decade.
July is a relatively wet time of year in Johnstown, averaging 99 mm of rainfall. The wettest July on record was 2004 with 175 mm, while the driest was 1983 at 43 mm.
Relative humidity in Johnstown during July averages 74%. The most humid July was 2004 at 85%, and the least humid was 1999 at 60%.
July receives about 5.7 kWh/m²/day of solar energy in Johnstown. The sunniest July was 2010 at 6.5 kWh/m²/day, and the cloudiest was 2004 at 4.9.
Average wind speed in Johnstown during July is 0.1 m/s. The windiest Julys were 2023, 2024 and 2025, among others at 0.1 m/s, while the calmest were 1990, 1992 and 2001 at 0 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.9°C | 21.2°C | 20.8°C | 21.9°C | 22.9°C | +2°C |
| Avg High | 26.7°C | 27.0°C | 26.6°C | 27.4°C | 28.7°C | +2°C |
| Avg Low | 15.2°C | 15.5°C | 15.1°C | 16.4°C | 17.1°C | +1.9°C |
| Avg Rain | 101 mm | 98 mm | 96 mm | 104 mm | 96 mm | -5 mm |
July temperatures in Johnstown have risen by about 2.5°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 6.1°C (1983) to a record high of 37.1°C (1988).
Rainfall in July is a relatively wet time of year, averaging 99 mm, with a wettest year of 175 mm.
One of the best times to visit Johnstown
July is one of the best times to visit Johnstown. Expect days averaging 27.2°C and nights around 15.8°C (mean 21.5°C) — warmer than Johnstown's yearly average — with higher rainfall (99 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 | 23.0°C | 17.9°C | 33.7°C | 11.9°C | 95 mm | 80% | 0.1 m/s | 5.9 |
| 2024 | 29.1°C | 23.0°C | 16.9°C | 33.3°C | 9.8°C | 105 mm | 70% | 0.1 m/s | 6.2 |
| 2023 | 27.7°C | 22.2°C | 16.7°C | 32.5°C | 13.3°C | 136 mm | 76% | 0.1 m/s | 5.6 |
| 2022 | 28.4°C | 22.6°C | 16.8°C | 33.2°C | 12.8°C | 92 mm | 71% | 0.1 m/s | 5.8 |
| 2021 | 28.0°C | 22.0°C | 16.0°C | 31.7°C | 11.5°C | 97 mm | 72% | 0.1 m/s | 5.7 |
| 2020 🔥 | 31.1°C | 24.6°C | 18.0°C | 34.3°C | 12.9°C | 51 mm | 65% | 0.1 m/s | 6.4 |
| 2019 | 26.9°C | 22.1°C | 17.2°C | 31.5°C | 11.9°C | 105 mm | 83% | 0.1 m/s | 5.9 |
| 2018 | 26.2°C | 20.9°C | 15.7°C | 34.6°C | 9.9°C | 151 mm | 82% | 0.1 m/s | 5.8 |
| 2017 | 26.4°C | 21.3°C | 16.2°C | 31.0°C | 10.2°C | 118 mm | 80% | 0.1 m/s | 5.6 |
| 2016 | 29.8°C | 23.5°C | 17.2°C | 34.6°C | 11.0°C | 56 mm | 65% | 0.1 m/s | 5.9 |
| 2015 | 25.9°C | 20.7°C | 15.4°C | 31.5°C | 8.3°C | 110 mm | 80% | 0.1 m/s | 6 |
| 2014 | 25.5°C | 19.9°C | 14.4°C | 30.3°C | 8.7°C | 103 mm | 75% | 0.1 m/s | 5.7 |
| 2013 | 26.6°C | 21.8°C | 17.0°C | 30.9°C | 9.2°C | 87 mm | 80% | 0.1 m/s | 5.6 |
| 2012 | 29.4°C | 23.6°C | 17.7°C | 34.1°C | 12.9°C | 140 mm | 71% | 0.1 m/s | 5.7 |
| 2011 | 28.6°C | 22.8°C | 17.0°C | 33.7°C | 12.0°C | 61 mm | 74% | 0.1 m/s | 6.4 |
| 2010 | 29.1°C | 22.8°C | 16.5°C | 34.7°C | 7.2°C | 109 mm | 69% | 0.1 m/s | 6.5 |
| 2009 | 24.1°C | 18.8°C | 13.4°C | 28.6°C | 9.1°C | 115 mm | 76% | 0.1 m/s | 5.5 |
| 2008 | 25.9°C | 20.7°C | 15.4°C | 29.3°C | 11.2°C | 98 mm | 80% | 0.1 m/s | 5.9 |
| 2007 | 26.8°C | 20.4°C | 14.1°C | 32.3°C | 7.3°C | 76 mm | 68% | 0.1 m/s | 5.9 |
| 2006 | 27.5°C | 22.1°C | 16.7°C | 32.3°C | 9.6°C | 107 mm | 77% | 0.1 m/s | 5.6 |
| 2005 | 29.1°C | 23.2°C | 17.2°C | 33.5°C | 12.5°C | 87 mm | 71% | 0.1 m/s | 5.7 |
| 2004 🌧️ | 24.5°C | 20.0°C | 15.5°C | 27.3°C | 11.0°C | 175 mm | 85% | 0.1 m/s | 4.9 |
| 2003 | 25.0°C | 20.1°C | 15.2°C | 27.6°C | 10.7°C | 133 mm | 82% | 0.1 m/s | 5.7 |
| 2002 | 29.1°C | 22.6°C | 16.1°C | 34.2°C | 8.6°C | 51 mm | 67% | 0.1 m/s | 6.1 |
| 2001 | 27.6°C | 20.5°C | 13.3°C | 34.6°C | 7.3°C | 50 mm | 61% | 0 m/s | 6 |
| 2000 | 26.2°C | 19.9°C | 13.6°C | 30.0°C | 9.0°C | 73 mm | 67% | 0.1 m/s | 5.3 |
| 1999 | 31.0°C | 24.1°C | 17.1°C | 36.3°C | 9.3°C | 64 mm | 60% | 0.1 m/s | 6.1 |
| 1998 | 25.4°C | 19.9°C | 14.4°C | 28.2°C | 8.7°C | 69 mm | 76% | 0.1 m/s | 5.8 |
| 1997 | 27.0°C | 20.7°C | 14.4°C | 32.5°C | 8.9°C | 57 mm | 69% | 0.1 m/s | 6 |
| 1996 | 23.6°C | 18.7°C | 13.8°C | 26.9°C | 8.3°C | 159 mm | 82% | 0.1 m/s | 5.4 |
| 1995 | 27.2°C | 21.7°C | 16.2°C | 33.5°C | 7.3°C | 74 mm | 75% | 0.1 m/s | 5.7 |
| 1994 | 27.8°C | 22.0°C | 16.3°C | 32.7°C | 10.8°C | 90 mm | 74% | 0.1 m/s | 5.5 |
| 1993 | 27.9°C | 22.1°C | 16.3°C | 33.5°C | 9.6°C | 92 mm | 71% | 0.1 m/s | 5.6 |
| 1992 | 26.1°C | 20.9°C | 15.7°C | 30.9°C | 9.5°C | 159 mm | 78% | 0 m/s | 5.4 |
| 1991 | 28.4°C | 22.2°C | 16.0°C | 33.9°C | 11.3°C | 87 mm | 67% | 0.1 m/s | 5.9 |
| 1990 | 25.3°C | 19.9°C | 14.5°C | 29.6°C | 9.6°C | 128 mm | 80% | 0 m/s | 5.3 |
| 1989 | 25.5°C | 20.8°C | 16.2°C | 33.4°C | 9.9°C | 163 mm | 83% | 0.1 m/s | 5.2 |
| 1988 | 30.8°C | 23.8°C | 16.7°C | 37.1°C | 6.9°C | 97 mm | 60% | 0.1 m/s | 5.7 |
| 1987 | 27.7°C | 22.0°C | 16.3°C | 32.2°C | 9.0°C | 74 mm | 74% | 0.1 m/s | 6 |
| 1986 | 26.6°C | 21.2°C | 15.9°C | 29.9°C | 9.2°C | 127 mm | 79% | 0.1 m/s | 5.7 |
| 1985 | 25.7°C | 19.7°C | 13.7°C | 30.8°C | 8.5°C | 115 mm | 76% | 0.1 m/s | 5.7 |
| 1984 ❄️ | 23.7°C | 18.5°C | 13.3°C | 27.7°C | 7.3°C | 85 mm | 81% | 0.1 m/s | 5 |
| 1983 | 26.8°C | 21.0°C | 15.2°C | 31.5°C | 6.1°C | 43 mm | 75% | 0.1 m/s | — |
| 1982 | 26.8°C | 21.0°C | 15.3°C | 31.6°C | 8.5°C | 92 mm | 77% | 0.1 m/s | — |
| 1981 | 26.6°C | 20.5°C | 14.5°C | 31.6°C | 7.0°C | 112 mm | 75% | 0.1 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 27.2°C with lows near 15.8°C (mean 21.5°C), based on 45 years of NASA POWER data.
July averages 99 mm of rainfall in Johnstown, a relatively wet time of year. The wettest on record was 175 mm in 2004.
The hottest July reached 37.1°C in 1988. The coldest dipped to 6.1°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 2.5°C. Daytime highs moved from 25.9°C to 28.3°C and overnight lows from 14.4°C to 16.9°C over the same span.
July is one of the warmer months of the year in Johnstown and a relatively wet time of year, so plan for around 27.2°C daytime highs and 15.8°C at night.
Not quite — July is the 12th coolest month in Johnstown, averaging 21.5°C.
For July in Johnstown, pack light layers you can adjust through the day, with typical highs of 27.2°C and lows of 15.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 74% — moderately humid.
Average wind speed in July is 0.1 m/s. The windiest July on record averaged 0.1 m/s (1981).
The wettest July on record was 2004 with 175 mm. On average, July sees 99 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 Johnstown 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.
