Irwin, ID Weather

Irwin, ID 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 83.70 degrees Fahrenheit, while the coldest month of the year is January with an average minimum temperature of 11.70 degrees Fahrenheit.

Temperature variations between night and day tend to be relatively big during summer with a difference that can reach 37 degrees Fahrenheit, and fairly limited during winter with an average difference of 19 degrees Fahrenheit.

The annual average precipitation at Irwin is 18.06 Inches. Rainfall in is fairly evenly distributed throughout the year. The wettest month of the year is May with an average rainfall of 2.75 Inches.

Weather Data

Current Conditions

(Updated: 3:55 AM MST WED NOV 25 2009)

Fair, 7°F	Humidity: 78%	Dewpoint: 1°F
	Wind Speed: NE 3.5 MPH (3 KT)	Heat Index: 7°F
	Barometer: 30.41 in.	Wind Chill: 7°F

Weather Forecast

(Generated: 3:29 AM MST WED NOV 25 2009)

	Hi: 37°F	Today: Sunny. Highs 32 to 41.
	Lo: 16°F
	Hi: 41°F	Thanksgiving day: Sunny. Highs 36 to 44.
	Lo: 26°F
	Hi: 39°F	Friday: Mostly cloudy with a chance of snow showers. Highs 34 to 42.
	Lo: 19°F
	Hi: 32°F	Saturday: Snow showers likely. Highs 26 to 36.
	Lo: 18°F
	Hi: 31°F	Sunday: Partly sunny with a slight chance of snow showers. Highs 27 to 34.
	Lo: 18°F
	Hi: 35°F	Monday: Partly cloudy. A slight chance of snow showers. Lows 13 to 21. Highs 29 to 39.
	Lo: 17°F

Moon, Sunrise and Sunset

	Moon Phase: Waxing Gibbous Moon	Civil Twilight: 6:58 AM MST	Sunrise: 7:30 AM MST
		Sunset: 4:53 PM MST	Civil Twilight: 5:24 PM MST

Normal Climate

Normal Temperatures

(SWAN VALLEY 2 E Weather station, 2.86 miles from Irwin)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	29.6	35.4	44.1	54.9	64.4	74.7	83.7	82.9	73.1	59.7	41.2	30.6	56.2
Mean °F	20.7	25.1	33.5	41.9	50.2	58.4	65.2	64.3	55.3	44.3	31.2	21.5	42.6
Min °F	11.7	14.8	22.8	28.9	36.0	42.0	46.6	45.7	37.5	28.8	21.1	12.4	29.0

Normal Precipitation