Sunshine, Average Wind Speed, Mean Number of Days Minimum Temperature Below 32 Degrees Fahrenheit, and Average Relative Humidity--Selected Cities statistics


		Average
		percentage		Average wind								Average relative humidity
		of possible		speed (m.p.h.)				Heating	Cooling				(percent)
STATE	Station	sunshine						degree	degree
								days	days
		Length		Length						Length	Annual		Jan.		July
		of	Annual	of	Annual	Jan.	July			of
		record		record						record	M	A	M	A	M	A
		(yr.)		(yr.)						(yr.)

AL	Mobile	47	60	50	8.8	10.1	6.9	1,702	2,627	36	87	59	82	63	90	62
AK	Juneau	47	23	53	8.3	8.0	7.5	8,897	0	32	79	69	76	73	78	66
AZ	Phoenix	57	81	53	6.2	5.3	7.1	1,350	4,162	38	50	23	65	32	43	20
AR	Little Rock	35	60	56	7.8	8.4	6.7	3,155	2,005	34	83	57	80	62	86	55
CA	Los Angeles	60	72	50	7.5	6.7	7.9	1,458	727	39	79	65	71	61	86	68
	Sacramento	49	73	48	7.9	7.2	8.9	2,749	1,237	12	82	46	90	70	76	29
	San Diego	55	72	58	7.0	6.0	7.5	1,256	984	38	77	63	72	58	82	67
	San Francisco	68	71	71	10.6	7.2	13.6	3,016	145	39	84	62	86	67	86	60
CO	Denver	61	67	47	8.6	8.6	8.3	6,020	679	35	67	40	63	49	68	34
CT	Hartford	41	52	44	8.4	9.0	7.3	6,151	677	39	77	52	72	56	79	51
DE	Wilmington	47	55	50	9.0	9.8	7.8	4,937	1,046	51	78	55	75	60	79	54
DC	Washington	48	55	50	9.4	10.0	8.3	4,047	1,549	38	75	53	70	56	76	53
FL	Jacksonville	47	61	49	7.9	8.1	7.0	1,434	2,551	62	89	56	87	58	89	59
	Miami	46	68	49	9.2	9.5	7.9	200	4,198	34	83	61	84	59	83	63
GA	Atlanta	61	59	60	9.1	10.4	7.7	2,991	1,667	38	82	56	79	60	88	59
HI	Honolulu	47	74	49	11.3	9.4	13.1	0	4,474	29	72	56	81	61	68	51
ID	Boise	56	58	59	8.7	8.0	8.4	5,861	754	59	69	43	80	70	54	22
IL	Chicago	37	52	40	10.4	11.7	8.4	6,536	752	40	80	61	78	69	82	57
	Peoria	52	53	55	9.9	11.0	7.8	6,148	982	39	83	63	80	70	87	61
IN	Indianapolis	64	51	50	9.6	10.9	7.5	5,615	1,014	39	84	62	81	71	87	60
IA	Des Moines	46	55	49	10.7	11.4	8.9	6,497	1,036	37	80	61	77	68	83	59
KS	Wichita	39	62	45	12.2	12.0	11.3	4,791	1,628	45	80	56	79	64	79	50
KY	Louisville	47	53	51	8.3	9.5	6.8	4,514	1,288	38	81	59	77	65	85	58
LA	New Orleans	47	60	50	8.2	9.3	6.1	1,513	2,655	50	88	64	85	67	91	66
ME	Portland	54	55	58	8.7	9.1	7.6	7,378	268	58	79	59	76	61	80	59
MD	Baltimore	45	58	48	8.9	9.6	7.7	4,707	1,137	45	77	54	72	57	80	53
MA	Boston	60	55	41	12.4	13.8	11.0	5,641	678	34	72	58	68	58	74	56
MI	Detroit	37	49	40	10.3	12.0	8.5	6,569	626	40	81	60	80	70	82	54
	Sault Ste. Marie	54	43	57	9.2	9.6	7.8	9,316	131	57	85	67	81	74	89	62
MN	Duluth	47	49	49	11.0	11.6	9.4	9,818	180	37	81	64	77	70	85	60
	Minneapolis-St. Paul	57	54	60	10.5	10.5	9.4	7,981	682	39	79	61	75	68	81	56
MS	Jackson	30	59	35	7.1	8.3	5.5	2,467	2,215	35	91	59	86	65	94	61
MO	Kansas City	23	59	26	10.6	11.2	9.2	5,393	1,288	26	81	61	77	65	85	60
	St. Louis	47	55	49	9.7	10.6	8.0	4,758	1,534	38	82	60	81	67	84	57
MT	Great Falls	57	51	57	12.6	14.9	10.0	7,741	388	37	68	46	67	61	68	31
NE	Omaha	49	59	62	10.5	10.9	8.8	6,300	1,072	34	81	60	79	66	85	60
NV	Reno	53	69	56	6.6	5.6	7.2	5,674	508	35	69	32	79	51	61	19
NH	Concord	54	55	56	6.7	7.3	5.7	7,554	328	33	81	54	76	59	84	51
NJ	Atlantic City	37	56	40	9.9	10.9	8.3	5,169	826	34	82	56	78	59	83	57
NM	Albuquerque	56	76	59	8.9	8.0	8.9	4,425	1,244	38	59	29	68	40	59	27
NY	Albany	57	49	60	8.9	9.8	7.5	6,894	507	33	80	58	78	63	81	55
	Buffalo	52	43	59	11.9	14.0	10.3	6,747	477	38	80	62	79	73	79	55
	New York ²	42	64	61	9.3	10.7	7.6	4,805	1,096	64	72	56	68	60	75	55
NC	Charlotte	49	59	49	7.4	7.8	6.6	3,341	1,582	38	82	53	78	56	86	56
	Raleigh	47	59	49	7.6	8.4	6.7	3,457	1,417	34	85	54	79	55	89	58
ND	Bismarck	56	55	59	10.2	10.0	9.2	8,968	488	39	81	58	75	70	85	49
OH	Cincinnati	44	49	51	9.0	10.5	7.2	5,248	996	36	82	60	80	69	86	57
	Cleveland	54	45	57	10.5	12.2	8.6	6,201	621	38	80	62	78	70	82	57
	Columbus	46	48	49	8.3	9.8	6.5	5,708	797	39	80	59	77	68	84	56
OK	Oklahoma City	44	64	50	12.3	12.6	10.9	3,659	1,859	33	80	56	78	60	80	51
OR	Portland	47	39	50	7.9	10.0	7.6	4,522	371	58	85	59	85	75	82	45
PA	Philadelphia	55	56	58	9.5	10.3	8.2	4,954	1,101	39	76	55	73	59	79	54
	Pittsburgh	43	44	46	9.0	10.5	7.3	5,968	654	38	79	57	76	66	83	54
RI	Providence	42	55	45	10.4	11.1	9.4	5,884	606	35	75	55	71	57	77	56
SC	Columbia	48	60	50	6.8	7.2	6.3	2,649	1,966	32	87	51	83	55	89	54
SD	Sioux Falls	50	57	50	11.1	10.9	9.8	7,809	744	35	82	62	78	70	84	56
TN	Memphis	43	59	50	8.8	10.0	7.5	3,082	2,118	59	81	58	79	64	84	58
	Nashville	54	57	57	8.0	9.1	6.5	3,729	1,616	33	84	58	80	64	89	58
TX	Dallas-Fort Worth	42	64	45	10.7	11.0	9.8	2,407	2,603	35	82	57	80	61	81	50
	El Paso	53	80	56	8.8	8.3	8.3	2,708	2,094	38	56	27	65	35	61	29
	Houston	26	56	29	7.8	8.2	6.9	1,599	2,700	29	90	61	86	66	93	58
UT	Salt Lake City	69	62	69	8.8	7.5	9.5	5,765	1,047	39	67	43	79	69	52	22
VT	Burlington	52	44	55	9.0	9.8	8.0	7,771	388	33	77	59	73	64	79	53
VA	Norfolk	47	58	50	10.6	11.5	8.9	3,495	1,422	50	78	57	75	59	81	59
	Richmond	50	56	50	7.7	8.1	6.9	3,963	1,348	64	83	53	80	57	85	56
WA	Seattle-Tacoma ³	51	38	50	8.9	9.6	8.2	4,908	190	39	83	62	81	74	81	49
	Spokane	48	48	51	8.9	8.8	8.6	6,842	398	39	78	52	85	79	65	28
WV	Charleston	47	48	51	5.9	7.1	4.8	4,646	1,031	51	83	56	78	63	90	59
WI	Milwaukee	55	52	58	11.5	12.6	9.7	7,324	479	38	80	65	76	69	82	62
WY	Cheyenne	60	64	41	12.9	15.3	10.4	7,326	285	39	65	45	57	50	70	38
PR	San Juan	40	76	43	8.4	8.4	9.7	0	5,558	43	79	65	82	64	79	67

| NA Not available.Z Less than one-half a day.

Source: U.S. National Oceanic and Atmospheric Administration, Comparative Climatic Data, annual.

http://www.ncdc.noaa.gov/ol/climate/climateproducts.html * Heating and Cooling Degree Days

Degree day data are used to estimate amounts of energy required to maintain comfortable indoor temperature levels. Daily values are computed from each days mean temperature (max + min/2). Each degree that a day's mean temperature is below or above 65 degrees Fahrenheit is counted as one heating or cooling degree day.

Sunshine - Average Percentage of Possible

The total time that sunshine reaches the surface of the earth is expressed as the percentage of the maximum amount possible from sunrise to sunset with clear sky conditions.

Cloudiness - Mean Number of Days - Clear (CL),

Partly Cloudy (PC), Cloudy (CD)

Mean number of days per category of cloudiness. The categories are determined for daylight hours only. Clear denotes zero to 3/10 average sky cover. Partly cloudy denotes 4/10 to 7/10 average sky cover. Cloudy denotes 8/10 to 10/10 average sky cover.

Average Relative Humidity (percent) - Morning (M) and Afternoon (A)

The relative humidity is expressed as a percentage measure of the amount of moisture in the air compared to the maximum amount of moisture the air can hold at the same temperature and pressure. Average humidity values are given for selected morning and afternoon observations. Maximum relative humidity values usually occur during morning hours. In this publication, the Local Standard Time (LST) of morning and afternoon humidities are shown below.

Atlantic, Alaskan (M morning 8 A.M.) (Afternoon 2 P.M.) Eastern, Bering, 165W Meridian (M morning 7 A.M.) (Afternoon 1 P.M.) Central, 180E Meridian (M morning 6 A.M.) (Afternoon NOON) Mountain, 165E Meridian (M morning 5 A.M.) (Afternoon 5 P.M.) Pacific, 150E Meridian (M morning 4 A.M.) (Afternoon 4 P.M.) 135E Meridian (M morning 9 A.M.) (Afternoon 3 P.M

*

http://www.allcountries.org/uscensus/414_sunshine_average_wind_speed_mean_number.html

These tables are based on figures supplied by the United States Census Bureau, U.S. Department of Commerce and are subject to revision by the Census Bureau.

Copyright © 2006 Photius Coutsoukis and Information Technology Associates, all rights reserved.