Weather Averages for Boulder, CO

7-day Forecast / 10-day Forecast

Latitude: 40°2'N, Longitude: 105°13'W, Elevation: 5288.0 ft, Distance: 1.41 mi Boulder, CO Averages »

	Unit	Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Average temperature over 64 years	°F	51	33	34	39	48	55	66	71	71	62	51	41	34
Average high temperature over 64 years	°F	64	44	46	51	60	69	80	84	84	77	66	53	46
Average low temperature over 64 years	°F	37	21	21	26	36	44	53	59	57	50	39	28	21
Highest recorded temperature over 64 years	°F	104	73	78	86	84	93	104	104	102	96	89	78	73
Lowest recorded temperature over 64 years	°F	-32	-32	-27	-13	3	19	30	39	36	23	-2	-11	-20
Average number of rainy days over 67 years	days	41.3	1.7	2.3	4.2	5.7	6.2	3.7	3.9	3.5	2.8	3	2.1	2.2
Average number of days above 90°F over 10 years	days	44.6	-	-	-	-	0.3	10	16	13	5	0.3	-	-
Average precipitation over 67 years	in	18.3	0.5	0.8	1.6	2.7	3.1	1.7	1.8	1.6	1.4	1.5	0.9	0.8
Average relative humidity over 12 years	%	52	56	57	55	52	54	47	47	48	47	48	55	56
Average dew point over 12 years	°F	30	15	17	19	26	37	44	48	48	39	30	21	17
Average number of days below 32°F over 10 years	days	129.6	25	22	22	10	1	0.3	-	-	0.3	6	19	24
Average number of days below 0°F over 12 years	days	5.7	1.5	1.3	0.8	-	-	-	-	-	-	-	1.1	1
Average snowfall over 63 years	in	73.2	8.2	10.2	15.3	11.9	2.8	-	-	-	0.6	4.8	9.6	9.8

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