Ontario climate

Ontario Weather in April

NOAA 1991-2020 normals for Ontario Ksrv, 2 km from Ontario

Average highs run from 60°F on April 1 to 68°F on April 30, and lows from 35°F to 42°F. Normal precipitation for the month is 0.87 in over about 8 wet days.

April day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Ontario, in °F, with the record for each date.020406080100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

April at a glance

Average high
63°F
Average low
38°F
Precipitation
0.87 in
Record high
90°FApr 23, 2012
Record low
19°FApr 1, 2008
Chance of a freeze
94%
Daylight
12 h 46 min to 14 h 09 min
Cloud cover
63%
Humidity
55%
Dew point
33°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.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Apr 160°F35°F75°F 202119°F 200828%
Apr 260°F35°F78°F 202120°F 200828%
Apr 360°F35°F80°F 202120°F 201828%
Apr 460°F36°F81°F 200024°F 201028%
Apr 560°F36°F75°F 200424°F 200928%
Apr 661°F36°F77°F 200723°F 202227%
Apr 761°F36°F77°F 201621°F 201227%
Apr 861°F36°F80°F 201627°F 200127%
Apr 961°F36°F82°F 201622°F 200127%0%
Apr 1061°F37°F86°F 202320°F 199927%0%
Apr 1162°F37°F79°F 201623°F 200727%0%
Apr 1262°F37°F82°F 202427°F 199926%0%
Apr 1362°F37°F83°F 200828°F 202026%0%
Apr 1462°F37°F77°F 202422°F 200526%0%
Apr 1563°F37°F74°F 202525°F 200526%0%
Apr 1663°F38°F77°F 200126°F 199925%0%
Apr 1763°F38°F77°F 201426°F 200825%0%
Apr 1864°F38°F79°F 202125°F 201825%0%
Apr 1964°F38°F83°F 201925°F 201124%0%
Apr 2064°F39°F83°F 200927°F 201124%0%
Apr 2165°F39°F86°F 200922°F 200824%0%
Apr 2265°F39°F86°F 200926°F 201123%0%
Apr 2365°F39°F90°F 201225°F 201123%0%
Apr 2466°F40°F82°F 201224°F 200223%0%
Apr 2566°F40°F80°F 201227°F 200223%0%
Apr 2666°F40°F82°F 200127°F 200822%0%
Apr 2767°F41°F88°F 201826°F 201122%0%
Apr 2867°F41°F83°F 200731°F 202622%0%
Apr 2968°F41°F86°F 202030°F 201922%0%
Apr 3068°F42°F88°F 202327°F 202422%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Ontario, in percent, and of at least 0.1 inch of snowfall.01020301102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (MDT).

April 1
sunrise 7:29 AM, sunset 8:15 PM
April 30
sunrise 6:41 AM, sunset 8:50 PM

Every day of April: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00356294 (Ontario Ksrv), public domain. Records: NOAA GHCN-Daily, station USW00024162, 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.