July is one of the warmer months of the year in Kennewick, with average highs near 32.2°C and lows around 16.4°C (mean 24.3°C). It is one of the drier months, averaging 7 mm of rainfall and 43% relative humidity across the period.
July is one of the warmer months of the year in Kennewick. Across 45 years of records, the warmest July in Kennewick was 2021 — when the month averaged 27.4°C — while the coldest was 1993 at 19.5°C. Typical July days reach 32.2°C with nights near 16.4°C. The long-term trend is warming, about 0.8°C per decade.
July is one of the drier months in Kennewick, averaging 7 mm of rainfall. The wettest July on record was 1998 with 43 mm, while the driest were 2017 and 2018 at 0 mm.
Relative humidity in Kennewick during July averages 43%. The most humid July was 1993 at 52%, and the least humid was 2021 at 35%.
July receives about 7.5 kWh/m²/day of solar energy in Kennewick. The sunniest Julys were 2003 and 2017 at 8.1 kWh/m²/day, and the cloudiest was 1987 at 6.6.
Average wind speed in Kennewick during July is 2.7 m/s. The windiest Julys were 1983, 1993 and 1995 at 3 m/s, while the calmest was 2022 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.7°C | 23.6°C | 25.1°C | 24.7°C | 25.8°C | +3.1°C |
| Avg High | 30.5°C | 31.3°C | 33.1°C | 32.6°C | 34.1°C | +3.6°C |
| Avg Low | 15.0°C | 16.0°C | 17.0°C | 16.8°C | 17.6°C | +2.6°C |
| Avg Rain | 8 mm | 15 mm | 3 mm | 5 mm | 3 mm | -5 mm |
July temperatures in Kennewick have risen by about 3°C between 1981–1985 and 2021–2025.
July has ranged from a record low of 8.2°C (1999) to a record high of 43.1°C (2022).
Rainfall in July is one of the drier months, averaging 7 mm, with a wettest year of 43 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.9°C per decade while lows rose 0.6°C per decade, widening the gap between day and night.
One of the best times to visit Kennewick
July is one of the best times to visit Kennewick. Expect days averaging 32.2°C and nights around 16.4°C (mean 24.3°C) — warmer than Kennewick's yearly average — with low rainfall (7 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 | 31.8°C | 23.8°C | 15.9°C | 38.3°C | 12.4°C | 4 mm | 44% | 2.6 m/s | 7.4 |
| 2024 | 35.5°C | 26.7°C | 17.9°C | 41.9°C | 13.0°C | 2 mm | 38% | 2.4 m/s | 7.7 |
| 2023 | 34.0°C | 26.1°C | 18.1°C | 39.0°C | 14.6°C | 2 mm | 36% | 2.5 m/s | 7.9 |
| 2022 | 34.8°C | 26.4°C | 18.0°C | 43.1°C | 13.2°C | 4 mm | 42% | 2.3 m/s | 7.7 |
| 2021 🔥 | 35.7°C | 27.4°C | 19.1°C | 41.2°C | 14.2°C | 7 mm | 35% | 2.7 m/s | 7.5 |
| 2020 | 32.7°C | 24.6°C | 16.4°C | 42.6°C | 11.2°C | 0 mm | 40% | 2.7 m/s | 7.9 |
| 2019 | 30.6°C | 23.4°C | 16.2°C | 36.2°C | 12.6°C | 2 mm | 44% | 2.8 m/s | 7.4 |
| 2018 | 34.4°C | 26.1°C | 17.8°C | 39.6°C | 11.0°C | 0 mm | 35% | 2.5 m/s | 7.9 |
| 2017 | 33.9°C | 25.6°C | 17.4°C | 39.1°C | 13.7°C | 0 mm | 41% | 2.6 m/s | 8.1 |
| 2016 | 30.6°C | 23.4°C | 16.2°C | 39.3°C | 13.1°C | 10 mm | 45% | 2.6 m/s | 7.3 |
| 2015 | 34.0°C | 26.4°C | 18.7°C | 41.3°C | 13.1°C | 3 mm | 35% | 2.7 m/s | 7.6 |
| 2014 | 34.8°C | 26.6°C | 18.3°C | 40.9°C | 12.4°C | 11 mm | 41% | 2.5 m/s | 7.3 |
| 2013 | 34.4°C | 25.9°C | 17.3°C | 41.7°C | 13.3°C | 1 mm | 39% | 2.6 m/s | 8 |
| 2012 | 31.9°C | 24.1°C | 16.3°C | 40.2°C | 9.8°C | 13 mm | 48% | 2.7 m/s | 7.5 |
| 2011 | 29.5°C | 21.7°C | 13.8°C | 35.9°C | 10.2°C | 3 mm | 49% | 2.5 m/s | 7.5 |
| 2010 | 32.0°C | 23.9°C | 15.8°C | 38.4°C | 10.8°C | 6 mm | 42% | 2.6 m/s | 7.6 |
| 2009 | 34.2°C | 25.9°C | 17.6°C | 40.2°C | 12.5°C | 3 mm | 38% | 2.5 m/s | 7.7 |
| 2008 | 32.1°C | 24.2°C | 16.2°C | 37.1°C | 11.9°C | 2 mm | 41% | 2.7 m/s | 7.6 |
| 2007 | 33.9°C | 26.1°C | 18.3°C | 42.2°C | 14.3°C | 3 mm | 41% | 2.7 m/s | 7.4 |
| 2006 | 33.9°C | 25.8°C | 17.6°C | 42.7°C | 12.1°C | 2 mm | 41% | 2.8 m/s | 7.9 |
| 2005 | 33.4°C | 25.0°C | 16.5°C | 39.6°C | 12.3°C | 6 mm | 40% | 2.6 m/s | 7.8 |
| 2004 | 33.4°C | 25.5°C | 17.6°C | 39.7°C | 12.2°C | 5 mm | 41% | 2.7 m/s | 7.7 |
| 2003 | 34.7°C | 26.1°C | 17.5°C | 41.6°C | 12.7°C | 0 mm | 37% | 2.6 m/s | 8.1 |
| 2002 | 33.9°C | 25.5°C | 17.0°C | 43.0°C | 10.7°C | 5 mm | 40% | 2.8 m/s | 7.8 |
| 2001 | 31.0°C | 23.3°C | 15.7°C | 39.4°C | 11.6°C | 5 mm | 44% | 2.8 m/s | 7.5 |
| 2000 | 30.8°C | 23.1°C | 15.5°C | 38.8°C | 10.1°C | 3 mm | 45% | 2.9 m/s | 7.7 |
| 1999 | 30.5°C | 22.4°C | 14.4°C | 39.4°C | 8.2°C | 3 mm | 44% | 2.8 m/s | 7.8 |
| 1998 🌧️ | 33.3°C | 26.1°C | 18.8°C | 42.5°C | 14.3°C | 43 mm | 49% | 2.7 m/s | 7.3 |
| 1997 | 29.8°C | 22.4°C | 15.0°C | 36.1°C | 11.0°C | 16 mm | 51% | 2.6 m/s | 7.5 |
| 1996 | 32.5°C | 24.5°C | 16.6°C | 39.9°C | 10.3°C | 10 mm | 45% | 2.5 m/s | 7.5 |
| 1995 | 30.6°C | 23.4°C | 16.1°C | 37.5°C | 11.6°C | 12 mm | 48% | 3 m/s | 7.3 |
| 1994 | 33.8°C | 25.4°C | 16.9°C | 41.9°C | 9.4°C | 8 mm | 40% | 2.6 m/s | 7.5 |
| 1993 ❄️ | 26.2°C | 19.5°C | 12.8°C | 32.8°C | 10.3°C | 18 mm | 52% | 3 m/s | 6.7 |
| 1992 | 30.6°C | 23.4°C | 16.2°C | 39.3°C | 12.8°C | 26 mm | 46% | 2.4 m/s | 6.7 |
| 1991 | 32.1°C | 24.0°C | 15.9°C | 39.0°C | 12.3°C | 9 mm | 46% | 2.5 m/s | 7.3 |
| 1990 | 33.3°C | 25.3°C | 17.3°C | 41.9°C | 10.2°C | 6 mm | 41% | 2.4 m/s | 7.1 |
| 1989 | 30.4°C | 22.6°C | 14.7°C | 35.9°C | 11.5°C | 3 mm | 44% | 2.9 m/s | 7.5 |
| 1988 | 31.7°C | 23.6°C | 15.5°C | 39.5°C | 9.0°C | 2 mm | 43% | 2.8 m/s | 7 |
| 1987 | 29.1°C | 22.1°C | 15.2°C | 38.7°C | 11.0°C | 9 mm | 46% | 2.9 m/s | 6.6 |
| 1986 | 28.1°C | 20.7°C | 13.2°C | 35.6°C | 8.5°C | 12 mm | 46% | 2.9 m/s | 6.8 |
| 1985 | 34.8°C | 26.3°C | 17.8°C | 39.1°C | 12.5°C | 5 mm | 39% | 2.6 m/s | 7.3 |
| 1984 | 32.3°C | 23.7°C | 15.1°C | 41.8°C | 11.3°C | 3 mm | 44% | 2.4 m/s | 7.3 |
| 1983 | 27.9°C | 21.0°C | 14.1°C | 37.0°C | 8.9°C | 15 mm | 52% | 3 m/s | — |
| 1982 | 30.1°C | 22.7°C | 15.2°C | 39.4°C | 9.4°C | 16 mm | 47% | 2.7 m/s | — |
| 1981 | 29.9°C | 21.9°C | 14.0°C | 38.0°C | 8.5°C | 8 mm | 46% | 2.9 m/s | — |
Actual recorded July data for each year, 1981–2025 — sourced from NASA POWER.
The average high in July is around 32.2°C with lows near 16.4°C (mean 24.3°C), based on 45 years of NASA POWER data.
July averages 7 mm of rainfall in Kennewick, one of the drier months. The wettest on record was 43 mm in 1998.
The hottest July reached 43.1°C in 2022. The coldest dipped to 8.2°C in 1999.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 3°C. Daytime highs moved from 31°C to 34.4°C and overnight lows from 15.2°C to 17.8°C over the same span.
July is one of the warmer months of the year in Kennewick and one of the drier months, so plan for around 32.2°C daytime highs and 16.4°C at night.
Not quite — July is the 12th coolest month in Kennewick, averaging 24.3°C.
For July in Kennewick, pack light, breathable clothing and sun protection, with typical highs of 32.2°C and lows of 16.4°C.
Relative humidity in July averages 43% — relatively dry.
Average wind speed in July is 2.7 m/s. The windiest July on record averaged 3 m/s (1983).
The wettest July on record was 1998 with 43 mm. On average, July sees 7 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 Kennewick 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.
