July is one of the warmer months of the year in Morristown, with average highs near 29.5°C and lows around 18.6°C (mean 24.1°C). It is a relatively wet time of year, averaging 126 mm of rainfall and 73% relative humidity across the period.
July is one of the warmer months of the year in Morristown. Across 45 years of records, the warmest July in Morristown was 1993 — when the month averaged 26.9°C — while the coldest were 1984 and 2009 at 21.2°C. Typical July days reach 29.5°C with nights near 18.6°C. The long-term trend is warming, about 0.2°C per decade.
July is a relatively wet time of year in Morristown, averaging 126 mm of rainfall. The wettest July on record was 2013 with 208 mm, while the driest was 1995 at 49 mm.
Relative humidity in Morristown during July averages 73%. The most humid July was 1989 at 85%, and the least humid was 1986 at 60%.
July receives about 5.8 kWh/m²/day of solar energy in Morristown. The sunniest Julys were 2018, 2020 and 2025, among others at 6.4 kWh/m²/day, and the cloudiest was 1996 at 5.1.
Average wind speed in Morristown during July is 0.5 m/s. The windiest Julys were 2015, 2017 and 2023, among others at 0.6 m/s, while the calmest were 1982, 1989 and 2020 at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.8°C | 24.1°C | 23.5°C | 24.2°C | 25.1°C | +1.3°C |
| Avg High | 29.3°C | 29.5°C | 29.1°C | 29.5°C | 30.6°C | +1.3°C |
| Avg Low | 18.3°C | 18.6°C | 17.9°C | 19.0°C | 19.5°C | +1.2°C |
| Avg Rain | 124 mm | 103 mm | 133 mm | 141 mm | 132 mm | +8 mm |
July temperatures in Morristown have risen by about 1.9°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 10.3°C (1983) to a record high of 38.6°C (2012).
Rainfall in July is a relatively wet time of year, averaging 126 mm, with a wettest year of 208 mm.
One of the best times to visit Morristown
July is one of the best times to visit Morristown. Expect days averaging 29.5°C and nights around 18.6°C (mean 24.1°C) — warmer than Morristown's yearly average — with higher rainfall (126 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 | 26.1°C | 20.5°C | 34.0°C | 18.0°C | 124 mm | 72% | 0.5 m/s | 6.4 |
| 2024 | 31.2°C | 25.5°C | 19.8°C | 35.5°C | 16.7°C | 147 mm | 70% | 0.5 m/s | 5.7 |
| 2023 | 30.4°C | 24.8°C | 19.2°C | 35.4°C | 15.9°C | 106 mm | 73% | 0.6 m/s | 5.9 |
| 2022 | 31.2°C | 25.6°C | 19.9°C | 35.3°C | 17.0°C | 194 mm | 73% | 0.5 m/s | 5.5 |
| 2021 | 29.5°C | 23.9°C | 18.3°C | 34.3°C | 12.0°C | 106 mm | 73% | 0.5 m/s | 5.9 |
| 2020 | 29.6°C | 24.5°C | 19.3°C | 33.2°C | 17.2°C | 115 mm | 77% | 0.4 m/s | 6.4 |
| 2019 | 28.4°C | 23.8°C | 19.3°C | 31.4°C | 13.0°C | 158 mm | 79% | 0.5 m/s | 6.1 |
| 2018 | 29.2°C | 24.1°C | 19.0°C | 34.0°C | 15.1°C | 105 mm | 77% | 0.5 m/s | 6.4 |
| 2017 | 30.5°C | 24.8°C | 19.2°C | 34.9°C | 13.6°C | 107 mm | 70% | 0.6 m/s | 6.3 |
| 2016 | 31.8°C | 25.9°C | 20.0°C | 36.1°C | 17.0°C | 113 mm | 69% | 0.5 m/s | 6.1 |
| 2015 | 28.3°C | 23.6°C | 19.0°C | 31.8°C | 15.7°C | 162 mm | 80% | 0.6 m/s | 5.6 |
| 2014 | 28.1°C | 22.2°C | 16.3°C | 32.3°C | 10.8°C | 146 mm | 72% | 0.5 m/s | 6.1 |
| 2013 🌧️ | 26.6°C | 22.2°C | 17.9°C | 30.0°C | 12.2°C | 208 mm | 84% | 0.5 m/s | 5.5 |
| 2012 | 30.8°C | 25.3°C | 19.8°C | 38.6°C | 16.0°C | 175 mm | 73% | 0.5 m/s | 5.7 |
| 2011 | 30.2°C | 25.0°C | 19.8°C | 33.6°C | 14.7°C | 110 mm | 74% | 0.5 m/s | 5.8 |
| 2010 | 31.3°C | 25.4°C | 19.5°C | 35.8°C | 12.9°C | 128 mm | 70% | 0.5 m/s | 6.3 |
| 2009 | 26.3°C | 21.2°C | 16.2°C | 29.0°C | 12.0°C | 158 mm | 79% | 0.6 m/s | 5.5 |
| 2008 | 30.3°C | 23.8°C | 17.2°C | 33.7°C | 11.9°C | 122 mm | 65% | 0.5 m/s | 6.1 |
| 2007 | 29.1°C | 23.2°C | 17.3°C | 34.5°C | 11.9°C | 134 mm | 69% | 0.5 m/s | 5.6 |
| 2006 | 30.9°C | 24.6°C | 18.3°C | 35.9°C | 10.8°C | 91 mm | 66% | 0.6 m/s | 6 |
| 2005 | 29.1°C | 24.2°C | 19.3°C | 34.5°C | 15.2°C | 166 mm | 79% | 0.5 m/s | 5.2 |
| 2004 | 28.7°C | 23.5°C | 18.4°C | 32.1°C | 15.7°C | 123 mm | 75% | 0.5 m/s | 5.8 |
| 2003 | 26.9°C | 22.3°C | 17.7°C | 29.2°C | 14.0°C | 171 mm | 84% | 0.5 m/s | 5.6 |
| 2002 | 31.3°C | 25.3°C | 19.3°C | 34.6°C | 16.8°C | 104 mm | 69% | 0.5 m/s | 5.6 |
| 2001 | 29.4°C | 23.4°C | 17.4°C | 32.5°C | 11.6°C | 152 mm | 70% | 0.5 m/s | 5.5 |
| 2000 | 29.4°C | 23.6°C | 17.8°C | 33.4°C | 16.0°C | 105 mm | 69% | 0.6 m/s | 5.9 |
| 1999 | 29.8°C | 24.3°C | 18.8°C | 35.3°C | 14.0°C | 131 mm | 76% | 0.5 m/s | 5.8 |
| 1998 | 28.3°C | 23.4°C | 18.5°C | 33.1°C | 15.9°C | 89 mm | 78% | 0.5 m/s | 5.6 |
| 1997 | 29.5°C | 24.0°C | 18.4°C | 32.7°C | 13.2°C | 74 mm | 72% | 0.5 m/s | 6.4 |
| 1996 | 28.2°C | 22.7°C | 17.3°C | 31.8°C | 13.1°C | 157 mm | 75% | 0.6 m/s | 5.1 |
| 1995 | 32.3°C | 25.6°C | 18.9°C | 35.8°C | 13.8°C | 49 mm | 63% | 0.5 m/s | 6.3 |
| 1994 | 27.6°C | 22.9°C | 18.3°C | 30.3°C | 15.2°C | 127 mm | 80% | 0.5 m/s | 5.5 |
| 1993 🔥 | 33.6°C | 26.9°C | 20.2°C | 36.5°C | 13.6°C | 60 mm | 61% | 0.5 m/s | 6.3 |
| 1992 | 29.0°C | 23.9°C | 18.7°C | 32.6°C | 16.8°C | 94 mm | 75% | 0.6 m/s | 5.5 |
| 1991 | 28.0°C | 23.5°C | 19.0°C | 31.3°C | 15.7°C | 128 mm | 81% | 0.5 m/s | 6 |
| 1990 | 29.0°C | 23.3°C | 17.7°C | 33.8°C | 13.6°C | 126 mm | 72% | 0.5 m/s | 5.9 |
| 1989 | 26.3°C | 22.3°C | 18.3°C | 29.4°C | 15.3°C | 149 mm | 85% | 0.4 m/s | 5.3 |
| 1988 | 31.3°C | 24.9°C | 18.4°C | 37.1°C | 10.7°C | 126 mm | 62% | 0.5 m/s | 5.7 |
| 1987 | 30.0°C | 24.4°C | 18.8°C | 35.4°C | 13.9°C | 86 mm | 67% | 0.5 m/s | 6.1 |
| 1986 | 32.6°C | 26.2°C | 19.9°C | 35.5°C | 12.8°C | 87 mm | 60% | 0.5 m/s | 6 |
| 1985 | 29.1°C | 23.4°C | 17.7°C | 33.8°C | 13.8°C | 111 mm | 70% | 0.5 m/s | 5.3 |
| 1984 ❄️ | 26.1°C | 21.2°C | 16.2°C | 30.9°C | 11.6°C | 204 mm | 81% | 0.5 m/s | 5.2 |
| 1983 | 29.4°C | 23.8°C | 18.3°C | 33.1°C | 10.3°C | 78 mm | 71% | 0.5 m/s | — |
| 1982 | 28.8°C | 23.8°C | 18.8°C | 32.0°C | 14.6°C | 167 mm | 78% | 0.4 m/s | — |
| 1981 | 30.3°C | 24.5°C | 18.6°C | 33.9°C | 14.2°C | 108 mm | 72% | 0.5 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 29.5°C with lows near 18.6°C (mean 24.1°C), based on 45 years of NASA POWER data.
July averages 126 mm of rainfall in Morristown, a relatively wet time of year. The wettest on record was 208 mm in 2013.
The hottest July reached 38.6°C in 2012. The coldest dipped to 10.3°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.9°C. Daytime highs moved from 28.7°C to 30.8°C and overnight lows from 17.9°C to 19.5°C over the same span.
July is one of the warmer months of the year in Morristown and a relatively wet time of year, so plan for around 29.5°C daytime highs and 18.6°C at night.
Not quite — July is the 12th coolest month in Morristown, averaging 24.1°C.
For July in Morristown, pack light layers you can adjust through the day, with typical highs of 29.5°C and lows of 18.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in July averages 73% — moderately humid.
Average wind speed in July is 0.5 m/s. The windiest July on record averaged 0.6 m/s (1992).
The wettest July on record was 2013 with 208 mm. On average, July sees 126 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 Morristown 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.
