July is one of the warmer months of the year in Modesto, with average highs near 36.8°C and lows around 14.8°C (mean 25.8°C). It is one of the drier months, averaging 1 mm of rainfall and 41% relative humidity across the period.
July is one of the warmer months of the year in Modesto. Across 45 years of records, the warmest July in Modesto was 2024 — when the month averaged 29.5°C — while the coldest was 1987 at 22.6°C. Typical July days reach 36.8°C with nights near 14.8°C. The long-term trend is warming, about 0.4°C per decade.
July is one of the drier months in Modesto, averaging 1 mm of rainfall. The wettest July on record was 1999 with 4 mm, while the driest were 2023, 2024 and 2025, among others at 0 mm.
Relative humidity in Modesto during July averages 41%. The most humid July was 1983 at 49%, and the least humid was 1984 at 31%.
July receives about 8.1 kWh/m²/day of solar energy in Modesto. The sunniest July was 2000 at 8.6 kWh/m²/day, and the cloudiest was 1988 at 7.1.
Average wind speed in Modesto during July is 3 m/s. The windiest Julys were 1989, 2018 and 2022, among others at 3.3 m/s, while the calmest were 1986, 1991 and 1994, among others at 2.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.1°C | 25.3°C | 26.1°C | 26.0°C | 26.8°C | +1.7°C |
| Avg High | 36.2°C | 36.1°C | 37.1°C | 37.0°C | 38.2°C | +2°C |
| Avg Low | 14.1°C | 14.4°C | 15.0°C | 15.1°C | 15.5°C | +1.4°C |
| Avg Rain | 0 mm | 1 mm | 1 mm | 0 mm | 0 mm | 0 mm |
July temperatures in Modesto have risen by about 1.6°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 8.7°C (1999) to a record high of 46.8°C (2024).
Rainfall in July is one of the drier months, averaging 1 mm, with a wettest year of 4 mm.
One of the best times to visit Modesto
July is one of the best times to visit Modesto. Expect days averaging 36.8°C and nights around 14.8°C (mean 25.8°C) — warmer than Modesto's yearly average — with low rainfall (1 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 | 36.0°C | 24.9°C | 13.8°C | 41.7°C | 10.8°C | 0 mm | 44% | 3.1 m/s | 8.3 |
| 2024 🔥 | 41.1°C | 29.5°C | 17.9°C | 46.8°C | 11.9°C | 0 mm | 32% | 3 m/s | 8 |
| 2023 | 38.3°C | 27.0°C | 15.7°C | 43.5°C | 10.2°C | 0 mm | 36% | 3.1 m/s | 8.3 |
| 2022 | 37.4°C | 26.2°C | 15.0°C | 42.4°C | 11.3°C | 0 mm | 40% | 3.3 m/s | 8.1 |
| 2021 | 38.9°C | 27.5°C | 16.1°C | 45.0°C | 11.7°C | 0 mm | 35% | 3.1 m/s | 8 |
| 2020 | 37.5°C | 25.9°C | 14.3°C | 42.5°C | 10.8°C | 0 mm | 39% | 3.1 m/s | 8.4 |
| 2019 | 36.6°C | 25.8°C | 14.9°C | 43.1°C | 11.1°C | 0 mm | 42% | 3.2 m/s | 8.3 |
| 2018 | 38.6°C | 27.7°C | 16.8°C | 41.8°C | 11.8°C | 1 mm | 35% | 3.3 m/s | 7.9 |
| 2017 | 39.0°C | 27.5°C | 16.0°C | 42.7°C | 11.7°C | 0 mm | 33% | 3.1 m/s | 8.3 |
| 2016 | 37.3°C | 25.9°C | 14.4°C | 43.8°C | 10.8°C | 0 mm | 38% | 3.2 m/s | 8.5 |
| 2015 | 35.6°C | 25.9°C | 16.2°C | 42.6°C | 11.9°C | 0 mm | 45% | 3.1 m/s | 7.8 |
| 2014 | 38.0°C | 27.4°C | 16.8°C | 42.2°C | 13.2°C | 0 mm | 39% | 2.9 m/s | 7.7 |
| 2013 | 37.7°C | 26.4°C | 15.2°C | 43.8°C | 11.4°C | 0 mm | 40% | 3.1 m/s | 7.9 |
| 2012 | 36.1°C | 24.8°C | 13.5°C | 42.8°C | 10.1°C | 0 mm | 43% | 3 m/s | 8.3 |
| 2011 | 35.0°C | 24.2°C | 13.5°C | 40.3°C | 9.9°C | 0 mm | 47% | 3 m/s | 8.4 |
| 2010 | 36.2°C | 24.8°C | 13.4°C | 41.4°C | 9.5°C | 0 mm | 45% | 3.1 m/s | 8.5 |
| 2009 | 37.3°C | 25.9°C | 14.5°C | 44.7°C | 10.2°C | 0 mm | 40% | 3 m/s | 8.4 |
| 2008 | 36.8°C | 25.7°C | 14.5°C | 44.9°C | 10.0°C | 0 mm | 44% | 3.1 m/s | 8 |
| 2007 | 36.3°C | 25.3°C | 14.3°C | 46.0°C | 10.2°C | 0 mm | 48% | 3.1 m/s | 8.2 |
| 2006 | 39.2°C | 28.4°C | 17.5°C | 46.7°C | 10.6°C | 0 mm | 38% | 2.9 m/s | 8.2 |
| 2005 | 38.7°C | 27.5°C | 16.3°C | 44.1°C | 12.3°C | 4 mm | 40% | 3 m/s | 8.3 |
| 2004 | 36.7°C | 25.6°C | 14.4°C | 40.7°C | 12.3°C | 0 mm | 45% | 3.1 m/s | 8.4 |
| 2003 | 38.6°C | 27.5°C | 16.4°C | 44.7°C | 10.4°C | 1 mm | 38% | 3.2 m/s | 7.9 |
| 2002 | 37.6°C | 26.1°C | 14.7°C | 45.4°C | 11.0°C | 0 mm | 42% | 3.1 m/s | 8.2 |
| 2001 | 35.8°C | 25.1°C | 14.4°C | 45.6°C | 10.7°C | 0 mm | 43% | 3 m/s | 8 |
| 2000 | 34.4°C | 23.7°C | 12.9°C | 42.6°C | 9.9°C | 0 mm | 46% | 3.1 m/s | 8.6 |
| 1999 🌧️ | 34.7°C | 23.8°C | 12.9°C | 42.5°C | 8.7°C | 4 mm | 43% | 3 m/s | 8.3 |
| 1998 | 35.2°C | 24.6°C | 14.1°C | 42.7°C | 9.4°C | 1 mm | 48% | 2.9 m/s | 8.5 |
| 1997 | 36.4°C | 25.4°C | 14.4°C | 40.6°C | 10.5°C | 2 mm | 43% | 3.1 m/s | 8.3 |
| 1996 | 38.4°C | 27.4°C | 16.5°C | 42.4°C | 11.1°C | 1 mm | 34% | 2.8 m/s | 8.3 |
| 1995 | 34.8°C | 24.6°C | 14.4°C | 43.6°C | 11.1°C | 1 mm | 48% | 2.9 m/s | 8.3 |
| 1994 | 36.9°C | 25.4°C | 14.0°C | 40.9°C | 11.7°C | 1 mm | 38% | 2.7 m/s | 8.1 |
| 1993 | 35.2°C | 24.2°C | 13.3°C | 41.7°C | 10.5°C | 1 mm | 43% | 2.9 m/s | 8.4 |
| 1992 | 35.1°C | 25.0°C | 14.8°C | 39.5°C | 10.9°C | 2 mm | 45% | 2.9 m/s | 7.5 |
| 1991 | 37.4°C | 26.0°C | 14.5°C | 43.4°C | 10.7°C | 0 mm | 41% | 2.7 m/s | 7.9 |
| 1990 | 37.0°C | 26.1°C | 15.3°C | 43.1°C | 10.9°C | 0 mm | 40% | 2.8 m/s | 7.9 |
| 1989 | 36.0°C | 24.4°C | 12.8°C | 41.8°C | 9.5°C | 0 mm | 42% | 3.3 m/s | 8.1 |
| 1988 | 39.0°C | 27.5°C | 16.1°C | 44.9°C | 10.8°C | 0 mm | 35% | 2.9 m/s | 7.1 |
| 1987 ❄️ | 33.1°C | 22.6°C | 12.0°C | 40.6°C | 9.6°C | 0 mm | 48% | 3.3 m/s | 8 |
| 1986 | 35.7°C | 24.7°C | 13.8°C | 40.4°C | 9.3°C | 1 mm | 39% | 2.7 m/s | 8.1 |
| 1985 | 38.0°C | 27.1°C | 16.3°C | 41.2°C | 11.5°C | 1 mm | 32% | 3 m/s | 7.5 |
| 1984 | 38.8°C | 27.6°C | 16.4°C | 43.2°C | 10.9°C | 0 mm | 31% | 2.7 m/s | 7.6 |
| 1983 | 32.9°C | 22.8°C | 12.7°C | 41.7°C | 9.6°C | 0 mm | 49% | 3.1 m/s | — |
| 1982 | 34.9°C | 24.1°C | 13.4°C | 40.3°C | 9.6°C | 0 mm | 43% | 3 m/s | — |
| 1981 | 37.3°C | 25.5°C | 13.8°C | 40.6°C | 10.2°C | 0 mm | 33% | 2.8 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 36.8°C with lows near 14.8°C (mean 25.8°C), based on 45 years of NASA POWER data.
July averages 1 mm of rainfall in Modesto, one of the drier months. The wettest on record was 4 mm in 1999.
The hottest July reached 46.8°C in 2024. The coldest dipped to 8.7°C in 1999.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.6°C. Daytime highs moved from 36.4°C to 38.3°C and overnight lows from 14.5°C to 15.7°C over the same span.
July is one of the warmer months of the year in Modesto and one of the drier months, so plan for around 36.8°C daytime highs and 14.8°C at night.
Not quite — July is the 12th coolest month in Modesto, averaging 25.8°C.
For July in Modesto, pack light, breathable clothing and sun protection, with typical highs of 36.8°C and lows of 14.8°C.
Relative humidity in July averages 41% — relatively dry.
Average wind speed in July is 3 m/s. The windiest July on record averaged 3.3 m/s (1987).
The wettest July on record was 1999 with 4 mm. On average, July sees 1 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 Modesto 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.
