Ontario Weather in April
Average highs run from 74°F on April 1 to 78°F on April 30, and lows from 50°F to 53°F. Normal precipitation for the month is 0.76 in over about 4 wet days.
April day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
April at a glance
- Average high
- 76°F
- Average low
- 51°F
- Precipitation
- 0.76 in
- Record high
- 101°FApr 26, 2004
- Record low
- 33°FApr 10, 1999
- Chance of a freeze
- 0%
- Days of 90°F or more
- 2.6
- Daylight
- 12 h 34 min to 13 h 32 min
- Cloud cover
- 32%
- Humidity
- 58%
- Dew point
- 40°F
- Wind
- 6.7 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 |
|---|---|---|---|---|---|
| Apr 1 | 74°F | 50°F | 91°F 2011 | 39°F 1999 | 14% |
| Apr 2 | 74°F | 50°F | 85°F 2016 | 34°F 1999 | 14% |
| Apr 3 | 74°F | 50°F | 87°F 2016 | 40°F 1999 | 14% |
| Apr 4 | 74°F | 50°F | 89°F 2026 | 34°F 1999 | 13% |
| Apr 5 | 74°F | 50°F | 93°F 2016 | 38°F 1999 | 13% |
| Apr 6 | 74°F | 50°F | 98°F 2016 | 40°F 2023 | 13% |
| Apr 7 | 74°F | 50°F | 96°F 2022 | 42°F 1999 | 13% |
| Apr 8 | 75°F | 50°F | 98°F 2022 | 37°F 2001 | 13% |
| Apr 9 | 75°F | 50°F | 96°F 2018 | 35°F 1999 | 13% |
| Apr 10 | 75°F | 50°F | 94°F 2018 | 33°F 1999 | 13% |
| Apr 11 | 75°F | 50°F | 90°F 2008 | 42°F 1999 | 12% |
| Apr 12 | 75°F | 50°F | 93°F 2008 | 44°F 2009 | 12% |
| Apr 13 | 75°F | 51°F | 96°F 2008 | 43°F 2022 | 12% |
| Apr 14 | 75°F | 51°F | 89°F 1999 | 40°F 2012 | 12% |
| Apr 15 | 76°F | 51°F | 88°F 1999 | 40°F 2012 | 12% |
| Apr 16 | 76°F | 51°F | 92°F 2011 | 43°F 2009 | 11% |
| Apr 17 | 76°F | 51°F | 92°F 1999 | 43°F 2013 | 11% |
| Apr 18 | 76°F | 51°F | 93°F 2019 | 43°F 2002 | 11% |
| Apr 19 | 76°F | 51°F | 96°F 2009 | 43°F 2003 | 11% |
| Apr 20 | 76°F | 52°F | 100°F 2009 | 40°F 2002 | 11% |
| Apr 21 | 77°F | 52°F | 100°F 2009 | 42°F 2010 | 11% |
| Apr 22 | 77°F | 52°F | 95°F 2017 | 42°F 2001 | 10% |
| Apr 23 | 77°F | 52°F | 92°F 2019 | 42°F 2010 | 10% |
| Apr 24 | 77°F | 52°F | 97°F 2020 | 47°F 2006 | 10% |
| Apr 25 | 77°F | 53°F | 96°F 2004 | 49°F 1999 | 10% |
| Apr 26 | 77°F | 53°F | 101°F 2004 | 46°F 2009 | 10% |
| Apr 27 | 77°F | 53°F | 100°F 2004 | 46°F 2003 | 10% |
| Apr 28 | 78°F | 53°F | 97°F 2008 | 45°F 1999 | 9% |
| Apr 29 | 78°F | 53°F | 97°F 2021 | 42°F 1999 | 9% |
| Apr 30 | 78°F | 53°F | 98°F 2021 | 45°F 2010 | 9% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (PDT).
- April 1
- sunrise 6:38 AM, sunset 7:12 PM
- April 30
- sunrise 6:02 AM, sunset 7:34 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.