Ontario, OR Weather

Ontario, OR climate is warm during summer when temperatures tend to be in the 70's and very cold during winter when temperatures tend to be in the 20's.

The warmest month of the year is July with an average maximum temperature of 93.10 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 18.40 degrees Fahrenheit.

Temperature variations between night and day tend to be relatively big during summer with a difference that can reach 36 degrees Fahrenheit, and fairly limited during winter with an average difference of 17 degrees Fahrenheit.

The annual average precipitation at Ontario is 9.45 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is December with an average rainfall of 1.41 Inches.

Weather Data

Current Conditions

(Updated: 11:53 PM MST MON NOV 23 2009)

Fair, 26°F	Humidity: 88%	Dewpoint: 23°F
	Wind Speed: W 5.8 MPH (5 KT)	Heat Index: 26°F
	Barometer: 30.49 in.	Wind Chill: 19°F

Weather Forecast

(Generated: 9:27 PM MST MON NOV 23 2009)

		Tonight: Increasing clouds. Patchy fog after midnight. Lows 22 to 27. Light winds.
	Lo: 25°F
	Hi: 41°F	Tuesday: Partly sunny. Patchy fog in the morning. Highs 38 to 43. Light winds.
	Lo: 26°F
	Hi: 41°F	Wednesday: Mostly sunny. Patchy fog in the morning. Highs 36 to 44. Light winds.
	Lo: 28°F
	Hi: 42°F	Thanksgiving day: Sunny. Patchy fog. Highs 38 to 45.
	Lo: 33°F
	Hi: 46°F	Friday: Partly sunny with a 30 percent chance of rain showers. Highs 43 to 48.
	Lo: 31°F
	Hi: 45°F	Saturday: Mostly cloudy. A 20 percent chance of rain and snow showers. Lows 28 to 33. Highs 41 to 48.
	Lo: 24°F
	Hi: 42°F	Sunday: Partly cloudy. A 20 percent chance of snow showers. Lows 21 to 26. Highs 36 to 46.
	Lo: 23°F

Moon, Sunrise and Sunset

	Moon Phase: First Quarter Moon	Civil Twilight: 7:20 AM MST	Sunrise: 7:52 AM MST
		Sunset: 5:15 PM MST	Civil Twilight: 5:47 PM MST

Normal Climate

Normal Temperatures

(ONTARIO KSRV Weather station, 1.66 miles from Ontario)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	34.2	43.0	55.5	64.8	74.4	83.7	93.1	91.5	80.6	66.3	47.1	35.7	64.2
Mean °F	26.3	33.6	43.2	50.7	59.5	67.5	75.3	72.9	62.6	50.3	36.8	27.6	50.5
Min °F	18.4	24.1	30.9	36.6	44.5	51.3	57.4	54.3	44.5	34.2	26.5	19.5	36.9

Normal Precipitation