Using data as of Aug 2012, these are the NOAA temperature trends (in Fahrenheit per decade) 6 months ago to present, one year to present etc. (Of course the NOAA data may be heavily adjusted upwards)

Notice the 6 month trends for most states are amazingly low such as Iowa’s -249.5F / decade, which of course was caused by the very unusual warmth in March 2012.

But if you look all the way to the right at the 15 year trends, even with March 2012 being so warm, there are still 20 states with a negative trend.

And then looking at the 6 month trends that are hugely positive like Washington and Oregon caused by a very warm August.

State	6 months	1 Year	2	3	4	5	6	7	8	9	10	11	12	13	14	15
Alabama	-190.9	15.9	13.6	14	8.1	3.5	2.2	0.5	0.2	0.8	0.8	0.6	1	0.5	0	0.1
Arizona	2.1	17	5.9	7.1	1	0.9	0.2	-1.1	-0.3	-0.8	-0.9	-1.2	-0.7	-1.1	-0.8	-0.2
Arkansas	-182	32.1	19.5	18.8	13.6	7.6	4.8	1.8	0.7	1	1.4	1.2	1.3	0.6	0.1	0
California	34	-2	5.5	4.1	-0.4	0.7	0	0	0.4	-0.4	-0.5	-0.5	-0.2	-0.6	0.1	0.4
Colorado	-83.7	40.3	14.2	17.1	6.7	6.1	4.3	1	0.4	0.1	-0.2	-0.4	-0.1	-0.7	-0.8	-0.3
Connecticut	-120.9	-28.3	24.3	11	12.5	7	5	2.6	2.6	2.6	3	1.3	1.5	1.2	0.7	0.4
Delaware	-97.3	-6.7	20.5	13.9	12.3	6.2	4.8	2.6	3.1	3	3.5	1.9	2.3	1.8	1.3	1
Florida	-118.9	2.8	16.3	10.4	6.3	1.6	0.9	0.4	0.4	0.5	0.4	0	0.3	0.2	-0.2	-0.2
Georgia	-189.5	7	16.5	13.5	8.3	3.6	2.2	0.7	0.7	0.8	0.9	0.3	0.9	0.5	0	-0.1
Idaho	25.2	1.5	10.4	5.4	1.9	3.3	0	-0.3	-0.5	-1	-1.7	-1.1	-0.5	-1	-0.8	-0.8
Illinois	-214.5	22.9	33.4	18.2	15.3	9.7	5.6	2.1	0.7	1	1.7	0.7	1.2	0.6	0.2	0
Indiana	-218.9	17	30.9	16.6	13.6	8.1	5	2.2	1.2	1.3	1.9	0.8	1.1	0.7	0.3	0
Iowa	-249.5	18.7	38.6	22.8	17.1	12.2	6.2	1.6	-0.1	0.5	0.9	-0.1	0.7	0	-0.5	-0.6
Kansas	-206.7	44.6	25.6	24.4	14.2	9.4	6.1	1.4	0.5	0.9	0.9	0.3	0.6	-0.1	-0.5	-0.3
Kentucky	-200.4	16.5	24.1	14.8	10.7	5.4	3.2	1.5	0.4	0.6	1	0.3	0.7	0.3	-0.1	-0.2
Louisiana	-176.8	10.5	9.8	14.7	7.8	3	2.8	0.8	0.1	0.6	1	0.9	1.3	0.8	0.1	0.1
Maine	-80.8	-26.3	15.4	2.5	10.1	8	6.1	2.8	3.3	3.3	3.8	2.3	2.2	1.7	1	0.8
Maryland	-131.1	-5.6	20.9	11.6	11.1	5.7	4.1	1.9	1.9	1.8	2.5	1.1	1.6	1.3	0.8	0.5
Massachusetts	-111.6	-20.1	25.4	9.9	11	6.6	4.4	2.2	2.5	2.6	3.1	1.4	1.4	1	0.5	0.2
Michigan	-182.2	5.5	33.1	9.5	14.2	8.9	5.3	1.7	1.2	1.8	2.5	1.2	1.1	0.7	0.1	-0.2
Minnesota	-224.2	-19.1	42.1	13.9	17.3	13.1	6.5	1.3	0.3	1.3	1.6	0.6	1.1	0.3	-0.2	-0.7
Mississippi	-201.5	19.3	11.9	13.6	7.9	3.2	2.3	0.6	0.2	0.9	1.2	1	1.4	0.8	0.1	0.1
Missouri	-205	36.6	32.5	22.3	15.4	9.9	5.4	1.7	0.6	1.1	1.6	0.9	1.3	0.6	0.1	0.1
Montana	-78.6	-21.1	31.2	15.7	10.2	5.7	1.2	-1.6	-1.7	-0.9	-1.1	-0.6	0.1	-0.7	-0.9	-1
Nebraska	-207.4	40.6	34.3	24.7	14.6	9.6	5.3	0.4	-0.8	-0.3	-0.1	-0.7	0	-0.7	-1	-0.8
Nevada	17.9	8	9.8	9	1.9	2.7	0.5	-0.5	0.1	-0.5	-1	-1	-0.7	-1.1	-0.6	-0.2
New Hampshire	-123.3	-25.9	23.6	9.9	12.3	8.1	5.9	3.1	2.9	2.8	3.1	1.5	1.7	1.3	0.7	0.4
New Jersey	-130.1	-18.5	20.4	9.5	10.2	4.9	3.8	1.7	2.1	2.3	3.3	1.7	2.1	1.8	1.3	0.9
New Mexico	-28.8	27	1.6	11.7	4.8	3.7	4.3	1.5	1.5	0.9	0.5	0.1	0.3	-0.2	-0.3	0.1
New York	-150.9	-20.8	27.6	10.9	12.1	6.9	5.4	2.6	2.4	2.7	3.2	1.5	1.7	1.3	0.8	0.4
North Carolina	-152.1	-6	16.2	11.2	8	2.5	1.8	0.8	1	1	1.2	0.4	0.9	0.7	0.3	0.2
North Dakota	-215.3	-36.3	47.1	18.1	19.4	11.1	5.1	-0.7	-1.4	0.2	0.5	0	0.6	-0.4	-0.6	-1
Ohio	-180.5	8	30.5	15.3	12.5	6.8	4.6	2.3	1.8	2	2.3	1	1.3	0.9	0.4	0.1
Oklahoma	-163.8	36.2	17.3	22.6	13.6	8.3	6.5	2.1	1.6	1.8	2	1.7	1.7	0.8	0.3	0.2
Oregon	43.8	-17.7	3.3	1.4	-0.9	1.5	-0.7	-0.8	-1.2	-1.8	-2	-1.6	-0.9	-1.1	-0.6	-0.7
Pennsylvania	-141.4	-4	28	13	12.2	6.3	4.6	2.2	1.8	1.9	2.4	0.9	1.2	0.8	0.3	0
Rhode Island	-146.2	-16.8	26	10.3	11	6.3	4.2	2.2	2.7	2.6	2.9	1.3	1.2	0.9	0.3	0.2
South Carolina	-185.4	-4.5	13.6	12	8.1	2.6	1.9	0.8	1.1	1.1	1.3	0.6	1.1	0.9	0.4	0.3
South Dakota	-214	9.1	47.9	24.8	17.9	10.6	5	-0.5	-1.8	-0.9	-0.6	-1	0	-0.7	-1.1	-1
Tennessee	-201.5	18.1	19.4	14.5	10	4.3	2.4	0.9	0.2	0.6	0.9	0.5	0.9	0.5	0	0
Texas	-103.9	16.4	6.5	18.8	8.6	4.1	4.8	1.3	1.3	1.4	1.5	1.2	1.3	0.5	0	0
Utah	-27	19.4	14.5	13.6	4.2	4.2	1.7	0	-0.2	-0.3	-0.7	-0.7	-0.6	-1.2	-0.9	-0.6
Vermont	-120.1	-21.2	27.2	9.1	11.1	7	5.5	2.5	2.6	3.1	3.6	2	2.1	1.8	1.2	0.8
Virginia	-140.4	-1.8	18.1	12.1	9.7	3.8	2.8	1.4	1.3	1.4	1.8	0.9	1.5	1.1	0.7	0.6
Washington	57.5	-14.4	2.7	-4.2	-1.4	0.9	-0.6	-1.3	-2.2	-2.6	-2.7	-2.1	-1.2	-1.1	-1	-1.2
West Virginia	-165.7	2.1	23.8	14	10	4.3	3	1.4	0.7	0.9	1.2	0.3	0.9	0.6	0.2	0.2
Wisconsin	-211.8	6.2	37.9	11.8	15.8	11.6	6.2	1.9	0.7	1.4	1.9	0.7	1	0.5	-0.1	-0.6
Wyoming	-84.1	29.9	22.1	17.1	8.1	6.7	2.6	0	-0.5	0	-0.2	0.1	0.7	-0.2	-0.4	-0.2