Historical Climate Data

Temperature Summary
Station: 472839 FOND DU LAC, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	24.0	29.0	40.3	54.1	68.0	77.0	81.1	78.2	70.1	57.9	42.1	29.0	54.2
Min °F	9.1	13.8	24.2	36.1	47.7	57.2	62.4	60.8	52.4	41.2	28.7	15.6	37.4
Mean °F	16.6	21.4	32.3	45.1	57.9	67.1	71.8	69.5	61.3	49.6	35.4	22.3	45.9
HDD base 65	1503	1221	1016	598	267	55	9	28	145	481	888	1323	7534
CDD base 65	0	0	0	1	47	119	217	167	33	2	0	0	586

Temperature Extremes
Period of Record: 1896-2001

Month	High Mean°F	Year	Low Mean°F	Year	1-Day Max°F	Date	1-Day Min°F	Date
JAN	31.1	1933	0.1	1912	57	01-09-1939	-41	01-30-1951
FEB	32.2	1998	8.6	1936	65	02-21-1930	-31	02-01-1918
MAR	43.7	1945	21.1	1960	83	03-29-1910	-24	03-01-1962
APR	54.1	1915	38.6	1975	90	04-22-1980	3	04-16-1904
MAY	66.2	1934	50.6	1907	105	05-31-1934	22	05-09-1947
JUN	75.4	1933	60.5	1969	104	06-29-1931	29	06-04-1945
JUL	78.8	1921	66.6	1956	110	07-13-1936	38	07-31-1918
AUG	77.3	1937	62.8	1915	103	08-16-1937	33	08-27-1915
SEP	70.0	1931	56.5	1993	101	09-10-1931	22	09-30-1899
OCT	60.3	1947	39.7	1925	90	10-06-1963	5	10-30-1925
NOV	45.7	2001	27.5	1995	81	11-01-1933	-10	11-25-1950
DEC	33.4	1931	11.7	1985	65	12-05-2001	-28	12-26-1914

Annual	52.3	1931	38.7	1901	110	07-13-1936	-41	01-30-1951
Winter	29.5	1932	11.9	1979	65	12-05-1901	-41	01-30-1951
Spring	51.9	1977	40.6	1909	105	05-31-1934	-24	03-01-1962
Summer	74.4	1931	63.6	1915	110	07-13-1936	29	06-04-1945
Fall	57.0	1931	44.5	1976	101	09-10-1931	-10	11-25-1950

Temperature Threshold Climatology
Derived from 1971-2000 Averages

*Annual/seasonal totals may differ from the sum of the monthly totals due to rounding.

Month	# Days Max ≥ 90°F	# Days Max ≤ 32°F	# Days Min ≤ 32°F	# Days Min ≤ 0°F
JAN	0.0	21.7	30.4	9.5
FEB	0.0	16.0	26.7	5.3
MAR	0.0	6.7	25.2	0.9
APR	0.0	0.6	10.2	0.0
MAY	0.3	0.0	0.7	0.0
JUN	2.2	0.0	0.0	0.0
JUL	3.6	0.0	0.0	0.0
AUG	1.9	0.0	0.0	0.0
SEP	0.3	0.0	0.3	0.0
OCT	0.0	0.0	4.9	0.0
NOV	0.0	4.8	20.3	0.2
DEC	0.0	16.2	29.0	4.6

Annual	8.5	65.5	147.1	20.4
Winter	0.0	54.0	86.0	19.5
Spring	0.3	7.3	36.1	0.9
Summer	7.8	0.0	0.0	0.0
Fall	0.3	4.7	25.0	0.2