Historical Climate Data

Temperature Summary
Station: 473269 GREEN BAY AIRPORT, WI
1971-2000 NCDC Normals

Element	JAN	FEB	MAR	APR	MAY	JUN	JUL	AUG	SEP	OCT	NOV	DEC	ANN
Max °F	24.1	28.9	40.0	54.6	68.0	76.8	81.2	78.5	70.2	57.9	42.4	29.0	54.3
Min °F	7.1	12.1	22.6	33.9	44.7	54.0	58.6	56.5	47.5	36.9	25.6	13.3	34.4
Mean °F	15.6	20.5	31.3	44.2	56.4	65.4	69.9	67.5	58.8	47.4	34.0	21.2	44.4
HDD base 65	1537	1262	1060	638	301	85	19	38	208	540	925	1350	7963
CDD base 65	0	0	0	3	24	95	177	126	36	2	0	0	463

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	27.6	1933	-1.1	1912	56	01-26-1944	-31	01-30-1951
FEB	31.3	1998	4.6	1936	61	02-26-2000	-33	02-10-1899
MAR	41.4	1910	19.5	1960	82	03-29-1910	-29	03-01-1962
APR	52.3	1915	35.1	1907	89	04-22-1980	7	04-03-1954
MAY	63.4	1977	47.5	1907	99	05-31-1934	21	05-09-1966
JUN	72.9	1933	57.2	1969	101	06-01-1934	32	06-06-1958
JUL	77.4	1921	64.9	1992	104	07-13-1936	40	07-06-1965
AUG	75.1	1947	61.7	1950	100	08-24-1948	38	08-30-1915
SEP	67.3	1931	54.2	1974	97	09-10-1931	24	09-29-1949
OCT	58.9	1947	39.0	1925	88	10-06-1963	12	10-30-1925
NOV	43.4	2001	25.4	1951	74	11-01-1933	-9	11-28-1976
DEC	32.1	1931	9.1	1976	64	12-05-2001	-27	12-19-1983

Annual	49.5	1931	40.4	1917	104	07-13-1936	-33	02-10-1999
Winter	27.1	1932	10.1	1904	64	12-05-1901	-33	02-10-1999
Spring	49.6	1977	37.6	1950	99	05-31-1934	-29	03-01-1962
Summer	72.6	1995	63.1	1915	104	07-13-1936	32	06-06-1958
Fall	54.7	1931	42.4	1976	97	09-10-1931	-9	11-28-1976

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	23.0	30.5	10.7
FEB	0.0	17.1	27.0	6.1
MAR	0.0	7.5	26.1	1.1
APR	0.0	0.4	13.8	0.0
MAY	0.1	0.0	2.0	0.0
JUN	1.9	0.0	0.0	0.0
JUL	2.9	0.0	0.0	0.0
AUG	1.4	0.0	0.0	0.0
SEP	0.2	0.0	0.7	0.0
OCT	0.0	0.0	8.7	0.0
NOV	0.0	5.3	22.6	0.2
DEC	0.0	17.8	29.5	5.4

Annual	6.4	71.2	160.8	23.6
Winter	0.0	57.9	86.9	22.2
Spring	0.1	7.9	41.8	1.1
Summer	6.1	0.0	0.0	0.0
Fall	0.2	5.3	32.1	0.2