Boulder, MT Weather

Boulder, MT climate is mild during summer when temperatures tend to be in the 60'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 82.20 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 9.90 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 moderate during winter with an average difference of 25 degrees Fahrenheit.

The annual average precipitation at Boulder is 11.51 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is May with an average rainfall of 1.99 Inches.

Weather Data

Current Conditions

(Updated: 8:53 PM MST SUN NOV 22 2009)

Overcast, 27°F	Humidity: 81%	Dewpoint: 22°F
	Wind Speed: CALM	Heat Index: 27°F
	Barometer: 29.89 in.	Wind Chill: 27°F

Weather Forecast

(Generated: 8:58 PM MST SUN NOV 22 2009)

		Tonight: Mostly cloudy. A chance of snow showers in the evening...Then a slight chance of snow showers after midnight. Lows 15 to 20. West winds 5 to 15 mph. Chance of snow 50 percent.
	Lo: 18°F
	Hi: 31°F	Monday: Mostly cloudy with a 20 percent chance of snow showers in the morning...Then partly cloudy in the afternoon. Highs 25 to 35. West winds 5 to 15 mph.
	Lo: 21°F
	Hi: 38°F	Tuesday: Mostly cloudy. A slight chance of snow showers in the morning...Then a slight chance of rain and snow showers in the afternoon. Highs 35 to 40. West winds 5 to 15 mph with gusts to 45 mph. Chance of precipitation 20 percent.
	Lo: 26°F
	Hi: 41°F	Wednesday: Partly cloudy. Highs 35 to 45. Lows 20 to 30.
	Lo: 26°F
	Hi: 41°F	Thursday: Partly cloudy. Highs 35 to 45. Lows 20 to 30.
	Lo: 26°F
	Hi: 41°F	Thursday: Partly cloudy. Highs 35 to 45. Lows 20 to 30.
	Lo: 26°F
	Hi: 41°F	Friday: Mostly cloudy with a chance of rain and snow showers. Highs 35 to 45. Chance of precipitation 30 percent.
	Lo: 23°F

Moon, Sunrise and Sunset

	Moon Phase: Waxing Crescent Moon	Civil Twilight: 7:05 AM MST	Sunrise: 7:38 AM MST
		Sunset: 4:49 PM MST	Civil Twilight: 5:23 PM MST

Normal Climate

Normal Temperatures

(BOULDER Weather station, 0.46 miles from Boulder)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	34.3	39.5	46.6	55.8	64.6	73.8	82.2	82.0	71.4	59.6	42.1	34.6	57.2
Mean °F	22.1	26.7	33.3	41.1	49.5	57.8	64.5	63.8	53.9	43.6	30.0	22.7	42.4
Min °F	9.9	13.9	19.9	26.3	34.3	41.8	46.8	45.5	36.4	27.5	17.9	10.7	27.6

Normal Precipitation