Mattawa Weather in July
Average highs run from 87°F on July 1 to 94°F on July 31, and lows from 63°F to 68°F. Normal precipitation for the month is 0.21 in over about 2 wet days.
July day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
July at a glance
- Average high
- 92°F
- Average low
- 67°F
- Precipitation
- 0.21 in
- Record high
- 109°FJul 24, 2006
- Record low
- 37°FJul 3, 1999
- Chance of a freeze
- 0%
- Days of 90°F or more
- 19.3
- Daylight
- 15 h 47 min to 14 h 53 min
- Cloud cover
- 30%
- Humidity
- 43%
- Dew point
- 47°F
- Wind
- 7.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Jul 1 | 87°F | 63°F | 105°F 2021 | 41°F 2002 | 8% | 0% |
| Jul 2 | 87°F | 64°F | 103°F 2013 | 41°F 2003 | 8% | 0% |
| Jul 3 | 88°F | 64°F | 102°F 2013 | 37°F 1999 | 8% | 0% |
| Jul 4 | 88°F | 64°F | 98°F 2001 | 38°F 2000 | 7% | 0% |
| Jul 5 | 89°F | 64°F | 102°F 2001 | 39°F 2000 | 7% | 0% |
| Jul 6 | 89°F | 65°F | 103°F 2007 | 45°F 2016 | 7% | 0% |
| Jul 7 | 89°F | 65°F | 101°F 2021 | 45°F 2006 | 7% | 0% |
| Jul 8 | 90°F | 65°F | 100°F 2024 | 45°F 1999 | 7% | 0% |
| Jul 9 | 90°F | 65°F | 103°F 2024 | 41°F 2003 | 6% | 0% |
| Jul 10 | 91°F | 66°F | 105°F 2024 | 45°F 2000 | 6% | 0% |
| Jul 11 | 91°F | 66°F | 104°F 2024 | 43°F 2008 | 6% | 0% |
| Jul 12 | 91°F | 66°F | 107°F 2002 | 45°F 2008 | 6% | 0% |
| Jul 13 | 92°F | 66°F | 105°F 2002 | 45°F 2008 | 6% | 0% |
| Jul 14 | 92°F | 67°F | 105°F 2002 | 45°F 2011 | 6% | 0% |
| Jul 15 | 92°F | 67°F | 101°F 2004 | 43°F 2000 | 6% | 0% |
| Jul 16 | 92°F | 67°F | 99°F 2004 | 43°F 2000 | 5% | 0% |
| Jul 17 | 93°F | 67°F | 103°F 2014 | 45°F 2003 | 5% | 0% |
| Jul 18 | 93°F | 67°F | 100°F 2004 | 44°F 1999 | 5% | 0% |
| Jul 19 | 93°F | 67°F | 100°F 2003 | 47°F 2000 | 5% | 0% |
| Jul 20 | 93°F | 68°F | 102°F 2003 | 46°F 2002 | 5% | 0% |
| Jul 21 | 93°F | 68°F | 98°F 2013 | 47°F 2019 | 5% | 0% |
| Jul 22 | 94°F | 68°F | 104°F 2006 | 46°F 2011 | 5% | 0% |
| Jul 23 | 94°F | 68°F | 105°F 2003 | 44°F 2012 | 5% | 0% |
| Jul 24 | 94°F | 68°F | 109°F 2006 | 45°F 2014 | 5% | 0% |
| Jul 25 | 94°F | 68°F | 101°F 2002 | 43°F 1999 | 5% | 0% |
| Jul 26 | 94°F | 68°F | 99°F 2021 | 45°F 2024 | 5% | 0% |
| Jul 27 | 94°F | 68°F | 102°F 2006 | 49°F 2003 | 4% | 0% |
| Jul 28 | 94°F | 68°F | 101°F 1999 | 48°F 2008 | 4% | 0% |
| Jul 29 | 94°F | 68°F | 103°F 2003 | 49°F 2003 | 4% | 0% |
| Jul 30 | 94°F | 68°F | 103°F 2003 | 46°F 2006 | 4% | 0% |
| Jul 31 | 94°F | 68°F | 105°F 2020 | 42°F 2008 | 4% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (PDT).
- July 1
- sunrise 5:10 AM, sunset 8:57 PM
- July 31
- sunrise 5:39 AM, sunset 8:32 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00456747 (Priest Rapids Dam), public domain. Records: NOAA GHCN-Daily, station USC00457522, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.