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

Moon, Sunrise and Sunset

	Moon Phase: Waning Gibbous Moon	Civil Twilight: 5:36 AM MDT	Sunrise: 6:11 AM MDT
		Sunset: 9:17 PM MDT	Civil Twilight: 9:52 PM MDT

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