US Design Outdoor Temperature and Relative Humidity - Winter and Summer

Outdoor temperatures and relative humidity's in different US states and cities summer and winter

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The table below can be used as an indication of design conditions in U.S cities summer and winter.

State	City	January				July
		Dry Bulb Temperature (^oF)	Normal Relative Humidity (%)			Dry Bulb Temperature (^oF)	Normal Relative Humidity (%)
		Dry Bulb Temperature (^oF)	7:30 am.	1:30 pm.	7:30 pm.	Dry Bulb Temperature (^oF)	7:30 am.	1:30 pm.	7:30 pm.
Alabama	Birmingham	10	81	61	66	95	84	56	68
Alabama	Mobile	10				95	90	64	78
Arizona	Flagstaff	-10	83	58		90	77	36
	Phoenix	25	75	47	39	100	53	31	23
	Yuma	30	56	37	27	105	51	31	23
Arkansas	Little Rock	5	80	67	68	110	85	55	59
California	Eureka	30	87		77	95	92		80
	Fresno	25	93	80	66	90	61	36	20
	Los Angeles	35	63	46	51	105	85	50	54
	Sacramento	30	90	82	70	90	76	46	28
	San Diego	35	76	58	60	100	86	68	65
	San Francisco	35	84	69	70	85	92	75	78
Colorado	Denver	-10	54	37	41	85	55	27	30
	Grand Junction	-15	77	64	64	95	48	27	22
	Pueblo	-20	67	44	48	95	73	34	35
Connecticut	New Haven	0	75	65	69	95	77	64	74
Delaware	Wilmington	0	77	62	70	95	80	52	69
District of Columbia	Washington	0	73	56	64	95	78	52	64
Florida	Jacksonville	25	89	56	75	95	85	57	76
Florida	Miami	35	87	59	75	91	83	64	76
Georgia	Atlanta	10	80	64	69	95	83	57	68
	Augusta	10	84	59	69	98	83	55	69
	Savannah	20	83	58	72	95	85	61	80
Idaho	Boise	-10	82	75	74	95	54	34	23
Idaho	Lewiston	-5	79	73	71	95	64	37	25
Illinois	Cairo	0	81	69		98	83	57
	Chicago	-10	81	70	75	95	78	51	55
	Peoria	-10	73	72	77	96	81	53	58
Indiana	Fort Wayne	-10	84	75	81	95	84	53	58
	Indianapolis	-10	83	72	78	95	84	54	60
	Terre Haute	0	82	70	76	95	77	50	56
Iowa	Davenport	-15				95
Iowa	Sioux City	-20	78	67	72	95	86	55	54
Kansas	Dodge City	-10	78	57	61	95	77	45	52
Kansas	Topeka	-10	78	64	67	100	85	54	54
Kentucky	Louisville	0	78	68	69	95	77	52	57
Louisiana	New Orleans	20	85	67	73	95	84	64	72
Louisiana	Shreveport	20	83	67	66	100	86	56	62
Maine	Portland	-5	81	65	74	90	78	58	76
Maryland	Baltimore	0	72	68	56	95	71	52	65
Massachusetts	Boston	0	72	59	67	92	72	55	70
Michigan	Detroit	-10	82	71	77	95	74	50	56
Michigan	Grand Rapids	-10	85	78	80	95	76	51	54
Minnesota	Deluth	-25	78	74	74	93	87	61	66
Minnesota	Minneapolis	-20	82	72	75	95	82	54	54
Mississippi	Vicksburg	10	82	65	67	95	87	61	70
Missouri	Kansas City	-10	78	64	66	100	76	48	47
Missouri	St. Louis	0	77	65	68	95	73	50	55
Montana	Billings	-25	67	73	60	90	65	40	33
Montana	Butte	-20	76	70	71	95	82	36	33
Nebraska	North Platte	-20	80	62	66	85	84	50	46
Nebraska	Omaha	-10	82	68	73	65	780	51	51
Nevada	Reno	-5	82	67	54	95	72	25	20
New Hampshire	Concord	-15	78	60	69	90	80	49	69
New Jersey	Atlantic City	5	79	68	74	95	81	72	82
	Newark	0	72	79	65	95	75	51	65
	Trenton	0	73	62	68	95	77	55	68
New Mexico	Albuquerque	0	68	51	46	95	59	33	28
New York	Albany	-10	75	63	71	93	79	52	64
	Buffalo	-5	79	72	78	93	78	53	63
	New York	0	72	61	66	95	75	58	68
	Rochester	-5	81	73	79	95	80	50	60
North Carolina	Asheville	0	82	59	69	93	88	56	73
North Carolina	Raleigh	10	82	57	69	95	86	55	72
North Dakota	Bismarck	-30	77	71	75	95	85	52	49
Ohio	Cincinnati	0	82	70	74	95	84	52	60
	Cleveland	0	81	72	79	95	79	52	58
	Columbus	-10	83	71	76	95	78	52	60
	Toledo	-10	79	72	75	95	76	52	59
Oklahoma	Oklahoma City	0	79	62	65	101	80	49	51
Oregon	Baker	-5	83	81	78	90	69	68	36
Oregon	Portland	10	87	82	78	90	86	63	48
Pennsylvania	Harrisburg	0	72	49	65	95	78	51	62
	Philadelphia	0	74	65	68	95	78	52	65
	Pittsburgh	0	77	67	63	95	80	52	63
	Scranton	-5	80	67		95	77	50
Rhode Island	Providence	0	73	60	67	93	79	57	73
South Carolina	Charleston	15	87	55	76	95	88	64	82
South Carolina	Columbia	10	81	57	65	95	83	56	68
South Dakota	Huron	-20	79	72	76	95	86	52	49
South Dakota	Rapid City	-20	71	69	67	95	71	42	40
Tennessee	Knoxville	0	83	65	69	95	83	55	66
Tennessee	Memphis	0	82	67	73	95	85	55	59
Texas	Amarillo	-10	71	51	52	100	77	43	42
	Corpus Christi	20	88	66	75	95	93	58	68
	Dallas	10	81	62	62	100	79	50	47
	El Paso	10	63	45	39	100	60	37	30
	Houston	20	85	66	73	95	90	58	66
	San Antonio	20	82	60	59	100	88	49	45
Utah	Salt Lake City	-10	80	71	72	95	56	27	23
Vermont	Burlington	-10	81	69	78	90	76	54	67
Virginia	Richmond	15	84	60	68	95	81	57	72
Washington	Seattle	15	86	80	74	85	86	63	47
Washington	Walla Walla	-5	80	74	78	95	50	33	22
West Virginia	Charleston	0	79	64	70	95	88	53	67
West Virginia	Parkersburg	-10	82	66	74	95	80	52	65
Wisconsin	Green Bay	-15	75	68	73	95	85	58	64
Wisconsin	Milwaukee	-15	76	70	73	95	81	58	64
Wyoming	Cheyenne	-15	59	48	55	95	73	36	40

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