Ontario climate

Ontario Weather in March

NOAA 1991-2020 normals for Ontario Intl AP, 4.7 km from Ontario

Average highs run from 70°F on March 1 to 74°F on March 31, and lows from 48°F to 49°F. Normal precipitation for the month is 1.64 in over about 5 wet days.

March 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.20406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

March at a glance

Average high
72°F
Average low
49°F
Precipitation
1.64 in
Record high
100°FMar 19, 2026
Record low
33°FMar 2, 2023
Chance of a freeze
0%
Days of 90°F or more
0.9
Daylight
11 h 28 min to 12 h 32 min
Cloud cover
38%
Humidity
61%
Dew point
38°F
Wind
6.5 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation.

DateNormal highNormal lowRecord highRecord lowChance wet
Mar 170°F48°F87°F 201334°F 200722%
Mar 270°F48°F86°F 202233°F 202322%
Mar 370°F48°F80°F 201734°F 200222%
Mar 470°F48°F87°F 201236°F 200222%
Mar 570°F48°F83°F 200736°F 200021%
Mar 670°F48°F86°F 200736°F 201721%
Mar 771°F48°F88°F 200438°F 201721%
Mar 871°F48°F90°F 200439°F 201620%
Mar 971°F48°F89°F 200441°F 200220%
Mar 1071°F49°F87°F 200438°F 201020%
Mar 1171°F49°F94°F 200737°F 201019%
Mar 1271°F49°F93°F 200733°F 200619%
Mar 1371°F49°F92°F 201737°F 200619%
Mar 1472°F49°F94°F 201337°F 200219%
Mar 1572°F49°F92°F 201537°F 200218%
Mar 1672°F49°F94°F 202636°F 202118%
Mar 1772°F49°F98°F 202636°F 200218%
Mar 1872°F49°F97°F 202639°F 201218%
Mar 1972°F49°F100°F 202638°F 200617%
Mar 2072°F49°F100°F 202642°F 201217%
Mar 2172°F49°F91°F 202642°F 199917%
Mar 2273°F49°F88°F 202240°F 200616%
Mar 2373°F49°F88°F 200838°F 200916%
Mar 2473°F49°F92°F 202542°F 200916%
Mar 2573°F49°F89°F 202240°F 202315%
Mar 2673°F49°F93°F 201540°F 202315%
Mar 2773°F49°F93°F 201540°F 202315%
Mar 2873°F49°F90°F 200441°F 200715%
Mar 2973°F49°F93°F 200443°F 200514%
Mar 3074°F49°F88°F 200343°F 202014%
Mar 3174°F49°F93°F 201141°F 202314%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Ontario, in percent.05101520251102030
  • Chance of a wet day

Sunrise and sunset

Times for 2026, local time (PDT).

March 1
sunrise 6:19 AM, sunset 5:47 PM
March 31
sunrise 6:39 AM, sunset 7:11 PM

Every day of March: sun and moon

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.