National Weather Service - Des Moines, IA

KOTM September, 2011
Date	Observed Low (F)	Observed High (F)	Normal Low (F)	Normal High (F)	Record Low (F)	Year	Record High (F)	Year	Observed Precipitation (inches)	Record Precipitation (inches)	Record Snow Fall (inches)
1	72	96	59	81	42	1949	103	1911	0	3.70 1931
2	71	93	59	81	40	1946	102	1897	Trace	2.45 1918
3	64	86	58	81	40	1974	100	1925	0.56	3.65 1926
4	50	74	58	80	43	1974	103	1925	0	1.17 1971
5	45	70	58	80	42	1962	107	1913	0	0.95 1902
6	43	71	57	80	43	2011	102	1913	0	1.57 1982
7	43	74	57	79	41	1956	101	1938	0	1.99 1941
8	49	79	56	79	43	2008	104	1912	0	2.47 1989
9	52	79	56	79	40	2008	102	1947	0	2.00 1921
10	54	80	55	78	40	1910	100	1912	0	1.90 1921
11	55	85	55	78	35	1940	101	1936	0	3.73 1913
12	59	88	55	78	35	1940	97	1939	0	1.95 1928
13	54	76	54	77	38	1902	99	1897	0	3.01 1961
14	38	65	54	77	35	1923	99	1939	0.01	5.32 1992
15	36	61	53	77	32	2007	99	1939	0	2.80 1926
16	47	56	53	76	32	1937	94	1931	0.12	1.62 1896
17	50	63	52	76	34	1937	98	1927	Trace	2.05 1978
18	56	64	52	75	33	1916	96	1910	0.32	2.60 1915
19	52	78	51	75	34	1991	96	1948	Trace	2.47 1965
20	52	82	51	74	32	2006	95	1940	0	3.31 1965
21	48	71	50	74	36	1999	95	1940	0	2.47 2009
22	40	64	50	74	33	1995	99	1937	0	1.89 1945
23	35	66	50	73	34	1983	93	1938	0	4.03 1902
24	37	66	49	73	32	1942	91	1984	0	0.93 1973
25	35	65	49	72	30	1928	89	1920	0.11	1.92 1930
26	47	59	48	72	29	1984	94	1938	0.36	2.75 1933
27	50	68	48	71	30	1942	92	1905	0	2.15 1988
28	54	75	47	71	23	1942	99	1953	0	1.99 1911
29	55	75	47	70	26	1899	93	1953	Trace	1.10 1927
30			47	70	26	1899	93	1897		3.87 1902
Average	49.8	73.4	52.9	76.0					1.48 Normal = 3.79

The special shading of colors in the Observed High/Low and Record High/Low/Year columns depict
observed monthly extremes and record monthly extremes and the years in which they occurred.

(The above data is unofficial and may contain errors.)
For official climate records, please contact...www.ncdc.noaa.gov.

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