Boulder, CO Weather

Boulder, CO 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 30's.

The warmest month of the year is July with an average maximum temperature of 87.20 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 19.20 degrees Fahrenheit.

Temperature variations between night and day tend to be relatively big during summer with a difference that can reach 31 degrees Fahrenheit, and moderate during winter with an average difference of 27 degrees Fahrenheit.

The annual average precipitation at Boulder is 19.93 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is May with an average rainfall of 3.05 Inches.

Weather Data

Current Conditions

(Updated: 9:47 PM MST TUE NOV 24 2009)

Partly Cloudy, 36°F	Humidity: 30%	Dewpoint: 7°F
	Wind Speed: VRB 3.5 MPH (3 KT)	Heat Index: 36°F
	Barometer: 30.16 in.	Wind Chill: 36°F

Weather Forecast

(Generated: 4:01 AM MST WED NOV 25 2009)

	Hi: 49°F	Today: Mostly cloudy in the morning then clearing. Highs in the upper 40s.
	Lo: 25°F
	Hi: 61°F	Thanksgiving day: Sunny. Highs in the lower 60s.
	Lo: 37°F
	Hi: 65°F	Friday: Sunny. Highs in the mid 60s.
	Lo: 21°F
	Hi: 45°F	Saturday: Mostly cloudy. A 20 percent chance of snow. Cooler. Highs in the mid 40s. Lows in the lower 20s.
	Lo: 21°F
	Hi: 39°F	Sunday: Mostly cloudy. A 10 percent chance of snow. Highs in the upper 30s. Lows in the lower 20s.
	Lo: 25°F
	Hi: 41°F	Monday: Mostly clear. Highs in the lower 40s. Lows in the mid 20s.
	Lo: 25°F

Moon, Sunrise and Sunset

	Moon Phase: Waxing Gibbous Moon	Civil Twilight: 6:27 AM MST	Sunrise: 6:56 AM MST
		Sunset: 4:38 PM MST	Civil Twilight: 5:08 PM MST

Normal Climate

Normal Temperatures

(BOULDER Weather station, 1.03 miles from Boulder)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	45.7	49.1	55.8	62.7	71.7	82.2	87.2	85.0	77.4	66.7	52.6	46.1	65.2
Mean °F	32.5	35.8	41.8	48.3	56.9	66.4	71.6	70.0	62.1	51.9	39.7	33.4	50.9
Min °F	19.2	22.5	27.7	33.9	42.0	50.5	55.9	55.0	46.8	37.1	26.8	20.6	36.5

Normal Precipitation