As of 05:39 PST

Weather in Ontario, CA

61°

Ontario, Friday, 6 November, 05:39

Clear. Feels like 59°. High 82°, low 57°.

Pressure30.00 inHg

Wind5.7 mph N

Humidity49%

Visibility6.2 mi

Dew point42°

See detailed hourly forecast

Monthly outlook for Ontario, CA: average high 76°, average low 61.2°. That is 3.2° above the climate normal for November. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 2 days and 0.9 inches. The warmest day looks like 7 November (84.4°), the coolest 20 November (55.5°).

76°/61.2°

Average high / low

+3.2°

Above normal

0 / 2

Wet days / normal

0.0 in

Precipitation this month

Ten-day blocks vs climate normal

Period	Forecast high	Normal	Difference
6 November – 15 November	81.4°	71.2°	+5.7°
16 November – 25 November	67°	68.2°	-0.7°
26 November – 5 December	at normal	65.5°	—

November records over 66 years

94.1°5 November 2020All-time high

28.8°19 November 1964All-time low

Sat, 0784° / 56°

84 °

Ontario, Saturday, 7 November

Clear. High 84°, low 56°.

Pressure30.00 inHg

Wind3.2 mph SW

Humidity28%

Visibility6.2 mi

Dew point41°

Sun, 0882° / 58°

82 °

Ontario, Sunday, 8 November

Overcast. High 82°, low 58°.

Pressure30.03 inHg

Wind2.4 mph SE

Humidity20%

Visibility6.2 mi

Dew point36°

Mon, 0982° / 62°

82 °

Ontario, Monday, 9 November

Clear. High 82°, low 62°.

Pressure30.03 inHg

Wind0.4 mph N

Humidity20%

Visibility6.2 mi

Dew point37°

Tue, 1081° / 63°

81 °

Ontario, Tuesday, 10 November

Clear. High 81°, low 63°.

Pressure30.09 inHg

Wind2.6 mph E

Humidity28%

Visibility—

Dew point38°

Wed, 1182° / 61°

82 °

Ontario, Wednesday, 11 November

Clear. High 82°, low 61°.

Pressure30.09 inHg

Wind3.6 mph NW

Humidity26%

Visibility—

Dew point36°

Thu, 1282° / 68°

82 °

Ontario, Thursday, 12 November

Clear. High 82°, low 68°.

Pressure29.97 inHg

Wind7.9 mph W

Humidity15%

Visibility—

Dew point24°

Fri, 1379° / 67°

79 °

Ontario, Friday, 13 November

Overcast. High 79°, low 67°.

Pressure29.91 inHg

Wind6.3 mph W

Humidity25%

Visibility—

Dew point35°

Sat, 1482° / 68°

82 °

Ontario, Saturday, 14 November

Clear. High 82°, low 68°.

Pressure29.94 inHg

Wind8.8 mph W

Humidity22%

Visibility—

Dew point34°

Sun, 1577° / 66°

77 °

Ontario, Sunday, 15 November

Clear. High 77°, low 66°.

Pressure29.97 inHg

Wind10.7 mph W

Humidity27%

Visibility—

Dew point37°

Mon, 1671° / 64°

0.01

71 °

Ontario, Monday, 16 November

Light rain. High 71°, low 64°.

Pressure30.09 inHg

Wind11.7 mph SW

Humidity57%

Visibility—

Dew point51°

Tue, 1771° / 62°

71 °

Ontario, Tuesday, 17 November

Overcast. High 71°, low 62°.

Pressure30.09 inHg

Wind9.3 mph SW

Humidity52%

Visibility—

Dew point48°

Wed, 1865° / 59°

65 °

Ontario, Wednesday, 18 November

Overcast. High 65°, low 59°.

Pressure30.00 inHg

Wind4.8 mph SW

Humidity39%

Visibility—

Dew point37°

Thu, 1965° / 56°

0.02

65 °

Ontario, Thursday, 19 November

Light rain. High 65°, low 56°.

Pressure29.83 inHg

Wind6.3 mph SW

Humidity33%

Visibility—

Dew point31°

Fri, 2066° / 56°

66 °

Ontario, Friday, 20 November

Mostly clear. High 66°, low 56°.

Pressure30.06 inHg

Wind7.7 mph W

Humidity44%

Visibility—

Dew point39°

Sat, 2163° / 56°

63 °

Ontario, Saturday, 21 November

Mostly clear. High 63°, low 56°.

Pressure30.06 inHg

Wind8.2 mph SW

Humidity46%

Visibility—

Dew point39°

From day 17 onward the outlook is built from 60-year climate statistics

Sun, 2267° / 46°

0.07

67 °

Ontario, Sunday, 22 November

Climate normal for this date — 60-year average.

Average high67°

Average low46°

Average precipitation0.07 in

Chance of precipitation15%

Record high93° (2017)

Record low31° (1979)

Mon, 2368° / 45°

0.01

68 °

Ontario, Monday, 23 November

Climate normal for this date — 60-year average.

Average high68°

Average low45°

Average precipitation0.01 in

Chance of precipitation8%

Record high92° (2017)

Record low34° (2003)

Tue, 2468° / 45°

0.04

68 °

Ontario, Tuesday, 24 November

Climate normal for this date — 60-year average.

Average high68°

Average low45°

Average precipitation0.04 in

Chance of precipitation15%

Record high88° (2017)

Record low35° (1972)

Wed, 2567° / 44°

0.07

67 °

Ontario, Wednesday, 25 November

Climate normal for this date — 60-year average.

Average high67°

Average low44°

Average precipitation0.07 in

Chance of precipitation15%

Record high88° (2017)

Record low30° (1973)

Thu, 2667° / 45°

0.08

67 °

Ontario, Thursday, 26 November

Climate normal for this date — 60-year average.

Average high67°

Average low45°

Average precipitation0.08 in

Chance of precipitation18%

Record high86° (1977)

Record low31° (2010)

Fri, 2766° / 44°

0.05

66 °

Ontario, Friday, 27 November

Climate normal for this date — 60-year average.

Average high66°

Average low44°

Average precipitation0.05 in

Chance of precipitation18%

Record high86° (2014)

Record low32° (1994)

Sat, 2865° / 43°

0.11

65 °

Ontario, Saturday, 28 November

Climate normal for this date — 60-year average.

Average high65°

Average low43°

Average precipitation0.11 in

Chance of precipitation18%

Record high83° (1980)

Record low32° (1976)

Sun, 2965° / 44°

0.14

65 °

Ontario, Sunday, 29 November

Climate normal for this date — 60-year average.

Average high65°

Average low44°

Average precipitation0.14 in

Chance of precipitation15%

Record high83° (2021)

Record low31° (2010)

Mon, 3065° / 43°

0.08

65 °

Ontario, Monday, 30 November

Climate normal for this date — 60-year average.

Average high65°

Average low43°

Average precipitation0.08 in

Chance of precipitation22%

Record high86° (2021)

Record low30° (2004)

Tue, 0166° / 43°

0.02

66 °

Ontario, Tuesday, 1 December

Climate normal for this date — 60-year average.

Average high66°

Average low43°

Average precipitation0.02 in

Chance of precipitation12%

Record high86° (2021)

Record low29° (2004)

Wed, 0265° / 43°

0.03

65 °

Ontario, Wednesday, 2 December

Climate normal for this date — 60-year average.

Average high65°

Average low43°

Average precipitation0.03 in

Chance of precipitation13%

Record high81° (2017)

Record low31° (2004)

Thu, 0366° / 44°

0.09

66 °

Ontario, Thursday, 3 December

Climate normal for this date — 60-year average.

Average high66°

Average low44°

Average precipitation0.09 in

Chance of precipitation17%

Record high78° (1979)

Record low33° (2004)

Fri, 0465° / 43°

0.1

65 °

Ontario, Friday, 4 December

Climate normal for this date — 60-year average.

Average high65°

Average low43°

Average precipitation0.1 in

Chance of precipitation20%

Record high82° (1979)

Record low31° (2011)

Sat, 0565° / 43°

0.08

65 °

Ontario, Saturday, 5 December

Climate normal for this date — 60-year average.

Average high65°

Average low43°

Average precipitation0.08 in

Chance of precipitation20%

Record high81° (1979)

Record low32° (2011)

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Ontario, CA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Ontario, CA since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.