Ontario Weather in July
Average highs run from 91°F on July 1 to 95°F on July 31, and lows from 63°F to 65°F. Normal precipitation for the month is 0.05 in over about 1 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
- 94°F
- Average low
- 65°F
- Precipitation
- 0.05 in
- Record high
- 117°FJul 6, 2018
- Record low
- 56°FJul 1, 2004
- Chance of a freeze
- 0%
- Days of 90°F or more
- 22.7
- Daylight
- 14 h 23 min to 13 h 51 min
- Cloud cover
- 19%
- Humidity
- 43%
- Dew point
- 49°F
- Wind
- 5.6 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Jul 1 | 91°F | 63°F | 103°F 2006 | 56°F 2004 | 1% |
| Jul 2 | 92°F | 63°F | 101°F 2001 | 58°F 2004 | 1% |
| Jul 3 | 92°F | 64°F | 101°F 2007 | 58°F 2005 | 1% |
| Jul 4 | 92°F | 64°F | 101°F 2001 | 57°F 2005 | 1% |
| Jul 5 | 93°F | 64°F | 102°F 2018 | 57°F 2023 | 1% |
| Jul 6 | 93°F | 64°F | 117°F 2018 | 58°F 2000 | 1% |
| Jul 7 | 93°F | 64°F | 112°F 2018 | 58°F 2000 | 1% |
| Jul 8 | 93°F | 64°F | 106°F 2017 | 58°F 2023 | 1% |
| Jul 9 | 93°F | 64°F | 104°F 2017 | 56°F 2010 | 1% |
| Jul 10 | 94°F | 65°F | 103°F 2012 | 59°F 2001 | 1% |
| Jul 11 | 94°F | 65°F | 105°F 2020 | 57°F 2001 | 1% |
| Jul 12 | 94°F | 65°F | 103°F 1999 | 56°F 2001 | 2% |
| Jul 13 | 94°F | 65°F | 101°F 2004 | 57°F 2000 | 2% |
| Jul 14 | 94°F | 65°F | 105°F 2006 | 59°F 1998 | 2% |
| Jul 15 | 94°F | 65°F | 105°F 2006 | 60°F 2011 | 2% |
| Jul 16 | 94°F | 65°F | 106°F 1998 | 57°F 2011 | 2% |
| Jul 17 | 94°F | 65°F | 102°F 1998 | 57°F 2001 | 2% |
| Jul 18 | 94°F | 65°F | 102°F 2009 | 57°F 2001 | 2% |
| Jul 19 | 94°F | 65°F | 105°F 2009 | 59°F 2001 | 2% |
| Jul 20 | 95°F | 65°F | 103°F 2016 | 58°F 2001 | 2% |
| Jul 21 | 95°F | 65°F | 106°F 2006 | 58°F 2001 | 2% |
| Jul 22 | 95°F | 65°F | 114°F 2006 | 56°F 2001 | 2% |
| Jul 23 | 95°F | 65°F | 108°F 2016 | 58°F 2001 | 2% |
| Jul 24 | 95°F | 65°F | 108°F 2019 | 59°F 1999 | 2% |
| Jul 25 | 95°F | 65°F | 104°F 2018 | 57°F 1999 | 2% |
| Jul 26 | 95°F | 65°F | 103°F 1998 | 58°F 1999 | 2% |
| Jul 27 | 95°F | 65°F | 102°F 1998 | 57°F 2012 | 2% |
| Jul 28 | 95°F | 65°F | 102°F 1998 | 57°F 2012 | 2% |
| Jul 29 | 95°F | 65°F | 102°F 2018 | 58°F 2002 | 2% |
| Jul 30 | 95°F | 65°F | 102°F 2020 | 60°F 2001 | 2% |
| Jul 31 | 95°F | 65°F | 105°F 2020 | 59°F 1998 | 2% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- July 1
- sunrise 5:43 AM, sunset 8:06 PM
- July 31
- sunrise 6:01 AM, sunset 7:52 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00003102 (Ontario Intl AP), public domain. Records: NOAA GHCN-Daily, station USW00003102, 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.