Historical Climate Data

Temperature Summary
Station: 475017 MANITOWOC, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	26.5	30.4	39.9	52.1	64.9	74.6	79.6	77.6	69.8	57.4	43.5	31.3	54.0
Min °F	10.8	15.3	24.4	34.1	44.3	53.6	60.1	59.3	51.6	40.8	29.2	16.7	36.7
Mean °F	18.7	22.9	32.2	43.1	54.6	64.1	69.9	68.5	60.7	49.1	36.4	24.0	45.4
HDD base 65	1438	1180	1019	657	339	101	16	32	158	493	859	1271	7563
CDD base 65	0	0	0	0	17	74	166	138	29	1	0	0	425

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	30.2	1933	2.6	1912	59	01-26-1944	-27	01-25-1904
FEB	33.6	1998	8.2	1936	59	02-20-1930	-29	02-10-1899
MAR	40.9	1945	22.4	1899	77	03-20-1921	-18	03-01-1962
APR	50.0	1955	35.8	1907	90	04-22-1980	3	04-05-1979
MAY	60.9	1998	45.7	1907	93	05-06-1934	21	05-08-1967
JUN	69.4	1988	57.4	1917	103	06-01-1934	35	06-05-1897
JUL	75.4	1921	64.6	1900	105	07-11-1936	26	07-07-1971
AUG	75.5	1955	62.5	1915	100	08-24-1948	38	08-30-1915
SEP	66.2	1931	54.5	1924	97	09-10-1931	26	09-30-1899
OCT	57.8	1963	41.7	1925	89	10-06-1963	14	10-30-1925
NOV	45.1	2001	29.4	1951	74	11-01-1950	-7	11-29-1976
DEC	35.0	1923	12.8	1985	64	12-05-2001	-21	12-28-1924

Annual	49.5	1931	41.0	1917	105	07-11-1936	-29	02-10-1999
Winter	30.5	1932	13.3	1904	64	12-05-1901	-29	02-10-1999
Spring	48.2	1977	38.5	1996	93	05-06-1934	-18	03-01-1962
Summer	71.8	1955	61.7	1915	105	07-11-1936	26	07-07-1971
Fall	54.6	1931	44.3	1976	97	09-10-1931	-7	11-29-1976

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	20.2	30.4	7.3
FEB	0.0	15.0	26.6	3.7
MAR	0.0	6.2	25.2	0.5
APR	0.0	0.3	11.4	0.0
MAY	0.0	0.0	1.4	0.0
JUN	1.3	0.0	0.0	0.0
JUL	2.1	0.0	0.0	0.0
AUG	1.0	0.0	0.0	0.0
SEP	0.2	0.0	0.4	0.0
OCT	0.0	0.0	4.8	0.0
NOV	0.0	3.2	19.2	0.1
DEC	0.0	14.6	28.7	4.0

Annual	4.7	59.8	148.2	15.7
Winter	0.0	50.0	85.7	15.1
Spring	0.1	6.6	37.8	0.5
Summer	4.4	0.0	0.0	0.0
Fall	0.2	3.3	24.8	0.1