Historical Climate Data

Temperature Summary
Station: 473058 GERMANTOWN 2 W, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	24.9	29.8	40.3	53.3	66.1	75.9	80.2	78.0	70.5	58.4	43.5	30.3	54.3
Min °F	8.1	12.9	23.3	33.7	43.8	53.0	58.4	56.6	48.7	37.6	26.9	14.7	34.8
Mean °F	16.5	21.4	31.8	43.5	55.0	64.5	69.3	67.3	59.6	48.0	35.2	22.5	44.6
HDD base 65	1504	1223	1030	645	333	87	23	64	184	527	894	1318	7832
CDD base 65	0	0	0	0	21	70	157	136	22	1	0	0	407

Temperature Extremes
Period of Record: 1948-2001

Month	High Mean°F	Year	Low Mean°F	Year	1-Day Max°F	Date	1-Day Min°F	Date
JAN	27.8	1990	3.3	1977	57	01-25-1950	-40	01-10-1982
FEB	32.7	1998	11.8	1979	64	02-12-1999	-28	02-03-1996
MAR	40.6	2000	21.6	1960	83	03-30-1986	-20	03-01-1962
APR	51.5	1955	37.9	1975	89	04-23-1980	7	04-09-1979
MAY	62.2	1977	48.5	1990	92	05-20-1975	20	05-10-1966
JUN	69.8	1987	59.4	1969	99	06-22-1988	27	06-04-1990
JUL	74.9	1955	63.9	1992	102	07-14-1995	38	07-05-1972
AUG	74.9	1955	60.3	1992	102	08-02-1988	36	08-16-1979
SEP	66.2	1948	51.6	1993	99	09-01-1953	22	09-30-1993
OCT	59.1	1963	42.2	1993	89	10-06-1963	14	10-30-1988
NOV	45.6	2001	27.4	1995	77	11-01-1950	-15	11-29-1976
DEC	31.8	1959	10.8	1983	67	12-06-2001	-25	12-24-1983

Annual	49.2	1998	42.6	1979	102	07-14-1995	-40	01-10-1982
Winter	28.3	1998	11.8	1977	67	12-06-1901	-40	01-10-1982
Spring	49.9	1977	39.3	1996	92	05-20-1975	-20	03-01-1962
Summer	71.6	1988	61.8	1992	102	07-14-1995	27	06-04-1990
Fall	54.0	1963	41.8	1993	99	09-01-1953	-15	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	21.2	30.4	10.0
FEB	0.0	15.4	27.0	5.9
MAR	0.0	6.9	25.7	1.1
APR	0.0	0.6	13.5	0.0
MAY	0.1	0.0	3.6	0.0
JUN	1.8	0.0	0.1	0.0
JUL	3.8	0.0	0.0	0.0
AUG	1.7	0.0	0.0	0.0
SEP	0.6	0.0	1.3	0.0
OCT	0.0	0.0	9.7	0.0
NOV	0.0	4.2	21.5	0.3
DEC	0.0	15.4	29.6	5.0

Annual	8.1	63.7	162.3	22.2
Winter	0.0	52.1	87.0	20.9
Spring	0.1	7.5	42.8	1.1
Summer	7.3	0.0	0.1	0.0
Fall	0.6	4.2	32.5	0.3