Historical Climate Data

Temperature Summary
Station: 478937 WAUKESHA WATER WORKS, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	27.5	32.8	43.9	57.0	70.1	80.0	84.2	81.5	73.4	61.0	45.4	32.6	57.5
Min °F	11.4	16.5	26.6	37.5	48.5	58.1	63.4	61.8	53.0	41.8	29.8	17.8	38.9
Mean °F	19.5	24.7	35.3	47.3	59.3	69.1	73.8	71.7	63.2	51.4	37.6	25.2	48.2
HDD base 65	1413	1130	922	534	230	45	7	20	107	428	823	1234	6893
CDD base 65	0	0	0	2	53	165	278	226	54	6	0	0	784

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	32.1	1933	2.8	1912	62	01-26-1944	-27	01-25-1904
FEB	36.4	1998	8.1	1936	66	02-12-1999	-28	02-03-1996
MAR	44.4	1910	22.6	1960	82	03-29-1910	-14	03-08-1943
APR	54.8	1915	38.4	1950	91	04-22-1980	7	04-07-1982
MAY	66.2	1977	50.5	1935	101	05-31-1934	25	05-02-1911
JUN	75.0	1995	60.9	1926	101	06-30-1931	29	06-04-1945
JUL	78.1	1901	67.0	1915	109	07-14-1936	41	07-31-1918
AUG	79.1	1995	63.2	1915	102	08-06-1918	35	08-28-1915
SEP	69.2	1931	56.4	1918	101	09-01-1953	25	09-28-1942
OCT	60.2	1963	39.7	1925	88	10-06-1963	7	10-30-1925
NOV	46.1	2001	28.4	1951	78	11-01-1944	-9	11-24-1950
DEC	33.7	1931	13.8	1919	68	12-06-2001	-23	12-24-1983

Annual	55.8	1987	42.9	1917	109	07-14-1936	-28	02-03-1996
Winter	31.2	1998	13.4	1904	68	12-06-1901	-28	02-03-1996
Spring	53.1	1977	40.2	1950	101	05-31-1934	-14	03-08-1943
Summer	77.3	1995	63.9	1915	109	07-14-1936	29	06-04-1945
Fall	56.7	1931	45.3	1976	101	09-01-1953	-9	11-24-1950

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	21.1	29.9	7.8
FEB	0.0	13.5	25.9	3.5
MAR	0.0	5.3	23.2	0.3
APR	0.0	0.4	9.6	0.0
MAY	0.6	0.0	0.7	0.0
JUN	3.0	0.0	0.0	0.0
JUL	5.5	0.0	0.0	0.0
AUG	2.9	0.0	0.0	0.0
SEP	0.9	0.0	0.2	0.0
OCT	0.0	0.0	4.5	0.0
NOV	0.0	4.0	19.4	0.2
DEC	0.0	14.6	27.8	3.5

Annual	13.3	57.8	139.1	14.8
Winter	0.0	49.1	83.6	14.7
Spring	0.6	5.8	33.5	0.3
Summer	11.5	0.0	0.0	0.0
Fall	0.9	4.0	23.9	0.1