Ontario, California, United States Climate

Weather: 14.56°C/58.21°F, Wind SW at 5.14 km/h, 77% Humidity, 0% Chance of rain

United States
(Photo by Nick de Partee on Unsplash)
Contents

Ontario Climate Summary

Located at an elevation of None meters (0 feet) above sea level, Ontario has a Mediterranean, warm summer climate (Classification: Csb). The district’s yearly temperature is 22.38ºC (72.28ºF) and it is 9.74% higher than United States’s averages. Ontario typically receives about 8.22 millimeters (0.32 inches) of precipitation and has 9.99 rainy days (2.74% of the time) annually.

CountryUnited States
CityCalifornia
Longitude-117.6508876
Latitude34.0633443
Attitude/ElevationNonem (0ft)
Local timeFriday 06:43
Annual high temperature25.48ºC (77.86ºF)
Annual low temperature17.16ºC (62.89ºF)
Average annual precip.8.22mm (0.32in)
Warmest monthAugust (34.4ºC / 93.92ºF)
Coldest MonthFebruary (11.09ºC / 51.96ºF)
Wettest MonthDecember (20.98mm / 0.83in)
Driest MonthJune (0.21mm / 0.01in)
Number of days with rainfall (≥ 1.0 mm)9.99 days (2.74%)
Days with no rain355.01 days (97.26%)
Humidity40.94%

Climate Ontario: Weather By Month

MonthJanFebMarAprMayJunJulAugSepNovOctDecYear
Record high °C (°F)29.0(84.2)31.0(87.8)30.0(86.0)35.0(95.0)34.0(93.2)39.0(102.2)44.0(111.2)40.0(104.0)44.0(111.2)38.0(100.4)33.0(91.4)28.0(82.4)44.0(111.2)
Average high °C (°F)19.83(67.69)18.46(65.23)18.71(65.68)23.43(74.17)24.66(76.39)29.46(85.03)33.74(92.73)34.4(93.92)32.81(91.06)28.61(83.5)23.3(73.94)18.4(65.12)25.48(77.86)
Daily mean °C (°F)16.87(62.37)15.44(59.79)16.05(60.89)20.46(68.83)21.88(71.38)26.46(79.63)30.4(86.72)30.83(87.49)29.38(84.88)25.18(77.32)20.02(68.04)15.61(60.1)22.38(72.28)
Average low °C (°F)12.46(54.43)11.09(51.96)11.53(52.75)14.98(58.96)16.59(61.86)20.16(68.29)24.09(75.36)24.86(76.75)23.98(75.16)20.0(68.0)14.86(58.75)11.27(52.29)17.16(62.89)
Record low °C (°F)3.0(37.4)5.0(41.0)3.0(37.4)1.0(33.8)10.0(50.0)12.0(53.6)18.0(64.4)17.0(62.6)15.0(59.0)12.0(53.6)2.0(35.6)2.0(35.6)1.0(33.8)
Average precipitation mm (inches)9.85(0.39)17.27(0.68)17.45(0.69)13.73(0.54)1.66(0.07)0.21(0.01)3.12(0.12)0.7(0.03)1.77(0.07)1.38(0.05)10.5(0.41)20.98(0.83)8.22(0.32)
Average precipitation days (≥ 1.0 mm)1.091.362.550.730.450.00.730.270.360.180.911.360.83
Average relative humidity (%)39.8439.250.6246.6449.0244.438.4937.7436.734.335.0439.2840.94
Mean monthly sunshine hours9.6410.6210.4111.0113.7514.314.1711.4511.5411.228.368.0811.21

Climate Graph

The chart below shows the mean monthly temperature and precipitation of Ontario in recent years.

Ontario

Ontario Temperature by Month

August
30.83°C | 87.49°F
July
30.4°C | 86.72°F
September
29.38°C | 84.88°F
June
26.46°C | 79.63°F
October
25.18°C | 77.32°F
May
21.88°C | 71.38°F
April
20.46°C | 68.83°F
November
20.02°C | 68.04°F
January
16.87°C | 62.37°F
March
16.05°C | 60.89°F
December
15.61°C | 60.1°F
February
15.44°C | 59.79°F

Historical Data

Summary
  • 2020
  • 2019
  • 2018
  • January
  • February
  • March
  • April
  • May
  • June
  • July
  • August
  • September
  • October
  • November
  • December
TemperatureMaxAverageMin
Max Temperature21.0°C (69.8°F)14.54°C (58.17°F)8.0°C (46.4°F)
Avg Temperature17.0°C (62.6°F)12.07°C (53.73°F)7.0°C (44.6°F)
Min Temperature13.0°C (55.4°F)8.96°C (48.13°F)6.0°C (42.8°F)
Dew PointMaxAverageMin
Dew Point10.0°C (50.0°F)-0.04°C (31.93°F)-12.0°C (10.4°F)
PrecipitationMaxAverageMinSum
Precipitation78.4mm | 3.09in5.84mm | 0.23in0.0mm | 0in163.6mm | 6.44in
Snowdepth0.0mm | 0in0.0mm | 0in0.0mm | 0in0.0mm | 0in
WindMaxAverageMin
Wind14.0kmh | 8.7mph7.29kmh | 4.53mph4.0kmh | 2.49mph
Gust Wind22.0kmh | 13.67mph8.96kmh | 5.57mph4.0kmh | 2.49mph
Sea Level PressureMaxAverageMin
Sea Level Pressure78.4mb5.84mb0.0mb
Ontario

Daily Observations

TimeTemperatureDew PointHumidityWind SpeedPressurePrecipitation
February° C | ° F° C | ° F%Kph | MphHg | MbTotal (mm/in)
2019-02-0112 | 53.68 | 46.4746 | 3.7329.97 | 10150.1 | 0.0
2019-02-0211 | 51.88 | 46.47914 | 8.729.85 | 101160.3 | 2.37
2019-02-0310 | 50.06 | 42.8758 | 4.9729.88 | 10121.4 | 0.06
2019-02-0410 | 50.06 | 42.87712 | 7.4629.83 | 10107.3 | 0.29
2019-02-058 | 46.42 | 35.66614 | 8.729.88 | 10123.1 | 0.12
2019-02-0611 | 51.8-4 | 24.8386 | 3.7330.12 | 10200.0 | 0.0
2019-02-0713 | 55.4-5 | 23.0304 | 2.4930.24 | 10240.0 | 0.0
2019-02-0814 | 57.2-4 | 24.8305 | 3.1130.12 | 10200.0 | 0.0
2019-02-0911 | 51.83 | 37.4576 | 3.7330.03 | 10171.0 | 0.04
2019-02-108 | 46.43 | 37.4689 | 5.5930.03 | 10171.2 | 0.05
2019-02-1114 | 57.2-3 | 26.6345 | 3.1130.18 | 10220.0 | 0.0
2019-02-1215 | 59.0-12 | 10.4186 | 3.7330.12 | 10200.0 | 0.0
2019-02-1312 | 53.6-9 | 15.8337 | 4.3529.97 | 10153.0 | 0.12
2019-02-1413 | 55.410 | 50.08311 | 6.8429.85 | 101178.4 | 3.09
2019-02-1511 | 51.85 | 41.0686 | 3.7330.06 | 10182.7 | 0.11
2019-02-1612 | 53.61 | 33.8517 | 4.3530.09 | 10190.1 | 0.0
2019-02-1710 | 50.00 | 32.0539 | 5.5930.0 | 10161.0 | 0.04
2019-02-1810 | 50.0-7 | 19.4318 | 4.9730.06 | 10180.0 | 0.0
2019-02-1912 | 53.6-8 | 17.6286 | 3.7330.15 | 10210.0 | 0.0
2019-02-207 | 44.61 | 33.8638 | 4.9729.88 | 10120.6 | 0.02
2019-02-218 | 46.4-1 | 30.2558 | 4.9729.68 | 10053.4 | 0.13
2019-02-2213 | 55.4-7 | 19.4297 | 4.3530.0 | 10160.0 | 0.0
2019-02-2313 | 55.4-4 | 24.8336 | 3.7330.27 | 10250.0 | 0.0
2019-02-2416 | 60.8-3 | 26.6315 | 3.1130.15 | 10210.0 | 0.0
2019-02-2517 | 62.6-0 | 32.0355 | 3.1130.06 | 10180.0 | 0.0
2019-02-2616 | 60.8-1 | 30.2345 | 3.1130.06 | 10180.0 | 0.0
2019-02-2715 | 59.05 | 41.0546 | 3.7330.09 | 10190.0 | 0.0
2019-02-2816 | 60.89 | 48.2655 | 3.1130.09 | 10190.0 | 0.0

Ontario 3 Year Historical Weather Data

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