Port Wing Weather Records (USC00476772)

Record envelope, standing records and threshold days for Port Wing (USC00476772), Wisconsin, United States, with 62 years of record.

Key Facts for Port Wing

Port Wing (USC00476772) is a weather station in Wisconsin, United States at 46.78 latitude and -91.39 longitude, 198 m (651 ft) above sea level.
The station reports from 1947 to 2008, 62 years of record.
1,464 records set at Port Wing still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Port Wing tied a daily record low maximum temperature of -6.7 C (19.9 F) on 22 November 2008.

About the Station

Location: Wisconsin, United States, 46.78 latitude, -91.39 longitude.
Elevation: 198 m (651 ft).
Period of record: 1947 to 2008, 62 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Port Wing. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Port Wing, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	10.6 C (51.1 F)	-41.1 C (-42.0 F)	n/a	n/a
Feb	13.9 C (57.0 F)	-40.0 C (-40.0 F)	n/a	n/a
Mar	21.1 C (70.0 F)	-32.8 C (-27.0 F)	n/a	n/a
Apr	31.7 C (89.1 F)	-20.0 C (-4.0 F)	n/a	n/a
May	35.0 C (95.0 F)	-9.4 C (15.1 F)	n/a	n/a
Jun	35.0 C (95.0 F)	-1.7 C (28.9 F)	n/a	n/a
Jul	38.3 C (100.9 F)	2.2 C (36.0 F)	n/a	n/a
Aug	36.7 C (98.1 F)	0.0 C (32.0 F)	n/a	n/a
Sep	34.4 C (93.9 F)	-5.0 C (23.0 F)	n/a	n/a
Oct	32.2 C (90.0 F)	-13.3 C (8.1 F)	n/a	n/a
Nov	26.1 C (79.0 F)	-24.4 C (-11.9 F)	n/a	n/a
Dec	16.1 C (61.0 F)	-34.4 C (-29.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Port Wing still stand. 1950 holds the most, with 53.

Standing records at Port Wing by the year they were set
Year set	Standing records
1947	20
1948	33
1949	20
1950	53
1951	37
1952	35
1953	26
1954	23
1955	28
1956	35
1957	25
1958	24
1959	31
1960	19
1961	29
1962	37
1963	33
1964	26
1965	32
1966	26
1967	25
1968	37
1969	23
1970	32
1971	23
1972	37
1973	18
1974	13
1975	4
1976	34
1977	37
1978	26
1979	1
1980	24
1981	39
1982	25
1983	36
1984	28
1985	28
1992	6
1993	16
1994	29
1995	29
1996	5
1997	28
1998	32
1999	23
2000	30
2001	29
2002	20
2003	35
2004	24
2005	24
2006	23
2007	16
2008	13

All-Time Record Progression

13 new records

13 all-time records were set at Port Wing between 15 December 1983 and 16 July 2006. Each dot is a new record.

When Port Wing set new all-time records
Date	Kind	Detail
1983-12-15	Record daily snowfall	Record daily snowfall 33.0 cm (13.0 in)
1985-03-05	Record daily snowfall	Record daily snowfall 50.8 cm (20.0 in)
1985-09-03	Record daily precipitation	Record daily precipitation 147.3 mm (5.8 in)
1994-01-15	Record low maximum temperature	Record low maximum temperature -26.7 C (-16.1 F)
1994-01-19	Record low maximum temperature	Record low maximum temperature -28.3 C (-18.9 F)
1997-01-15	Record snow depth	Record snow depth 101.6 cm (40.0 in)
1997-01-23	Record snow depth	Record snow depth 114.3 cm (45.0 in)
1997-01-24	Record snow depth	Record snow depth 119.4 cm (47.0 in)
1997-01-27	Record snow depth	Record snow depth 124.5 cm (49.0 in)
1997-01-29	Record snow depth	Record snow depth 129.5 cm (51.0 in)
1997-01-31	Record snow depth	Record snow depth 137.2 cm (54.0 in)
2001-08-06	Record high minimum temperature	Record high minimum temperature 27.2 C (81.0 F)
2006-07-16	Record high maximum temperature	Record high maximum temperature 38.3 C (100.9 F)

Wettest Day of Each Month

Sep: 147.3 mm (5.8 in)

The wettest day on record for each calendar month at Port Wing. The most was 147.3 mm (5.8 in) on 3 September 1985.

Record daily precipitation for each month at Port Wing
Month	Record daily precipitation (mm)	Date
Jan	27.9 mm (1.1 in)	1 January 2007
Feb	30.5 mm (1.2 in)	28 February 1948
Mar	61.0 mm (2.4 in)	12 March 1977
Apr	82.0 mm (3.2 in)	23 April 2001
May	75.4 mm (3.0 in)	26 May 1951
Jun	68.6 mm (2.7 in)	16 June 1954
Jul	108.7 mm (4.3 in)	5 July 1999
Aug	102.6 mm (4.0 in)	23 August 1978
Sep	147.3 mm (5.8 in)	3 September 1985
Oct	97.3 mm (3.8 in)	4 October 2005
Nov	40.9 mm (1.6 in)	1 November 1960
Dec	30.5 mm (1.2 in)	25 December 1982

Period of Record Coverage

1947 to 2008

56 years of record at Port Wing, 1947 to 2008. 22 years have data for under 90 percent of days and are left out of rankings: 1947, 1950, 1951, 1958, 1959, 1960, 1961, 1971 and others.

Days with data per year at Port Wing
Year	Days with data	Share of year	Complete
1947	183	50%	No
1948	352	96%	Yes
1949	354	97%	Yes
1950	297	81%	No
1951	227	62%	No
1952	363	99%	Yes
1953	358	98%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	365	100%	Yes
1957	365	100%	Yes
1958	279	76%	No
1959	302	83%	No
1960	299	82%	No
1961	315	86%	No
1962	362	99%	Yes
1963	363	99%	Yes
1964	331	90%	Yes
1965	361	99%	Yes
1966	362	99%	Yes
1967	363	99%	Yes
1968	364	99%	Yes
1969	364	100%	Yes
1970	364	100%	Yes
1971	271	74%	No
1972	355	97%	Yes
1973	356	98%	Yes
1974	270	74%	No
1975	117	32%	No
1976	143	39%	No
1977	354	97%	Yes
1978	311	85%	No
1979	46	13%	No
1980	354	97%	Yes
1981	330	90%	Yes
1982	342	94%	Yes
1983	351	96%	Yes
1984	350	96%	Yes
1985	301	82%	No
1992	146	40%	No
1993	180	49%	No
1994	363	99%	Yes
1995	302	83%	No
1996	119	33%	No
1997	356	98%	Yes
1998	294	81%	No
1999	358	98%	Yes
2000	353	96%	Yes
2001	342	94%	Yes
2002	344	94%	Yes
2003	365	100%	Yes
2004	364	99%	Yes
2005	356	98%	Yes
2006	273	75%	No
2007	300	82%	No
2008	307	84%	No

Latest Records

Latest records at Port Wing
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
22 November 2008	Port Wing, US	daily low max (Tie)	-6.7 C (19.9 F)	tie	30 years	3 of 100 (Routine)
5 November 2008	Port Wing, US	daily high max	21.1 C (70.0 F)	5.5 C (9.9 F)	52 years	30 of 100 (Routine)
5 November 2008	Port Wing, US	monthly high min (Tie)	11.7 C (53.1 F)	tie	6 years	4 of 100 (Routine)
4 November 2008	Port Wing, US	daily high max (Tie)	19.4 C (66.9 F)	tie	27 years	3 of 100 (Routine)
31 October 2008	Port Wing, US	daily high max	20.6 C (69.1 F)	2.3 C (4.1 F)	56 years	26 of 100 (Routine)
4 October 2008	Port Wing, US	daily low min (Tie)	-2.8 C (27.0 F)	tie	43 years	4 of 100 (Routine)
27 September 2008	Port Wing, US	daily rain	27.7 mm (1.1 in)	1.0 mm (0.04 in)	12 years	9 of 100 (Routine)
27 September 2008	Port Wing, US	daily high max (Tie)	27.2 C (81.0 F)	tie	56 years	5 of 100 (Routine)
9 September 2008	Port Wing, US	daily low min (Tie)	2.8 C (37.0 F)	tie	13 years	2 of 100 (Routine)
2 September 2008	Port Wing, US	monthly high min (Tie)	23.9 C (75.0 F)	tie	5 years	4 of 100 (Routine)
28 August 2008	Port Wing, US	daily rain	38.9 mm (1.5 in)	3.8 mm (0.15 in)	14 years	13 of 100 (Routine)
22 August 2008	Port Wing, US	daily high max (Tie)	30.0 C (86.0 F)	tie	48 years	5 of 100 (Routine)
18 August 2008	Port Wing, US	daily high min (Tie)	20.6 C (69.1 F)	tie	47 years	5 of 100 (Routine)
16 August 2008	Port Wing, US	daily low min	5.6 C (42.1 F)	1.6 C (2.9 F)	57 years	26 of 100 (Routine)
10 August 2008	Port Wing, US	daily low min (Tie)	5.6 C (42.1 F)	tie	46 years	4 of 100 (Routine)
23 July 2008	Port Wing, US	daily low min (Tie)	5.6 C (42.1 F)	tie	46 years	4 of 100 (Routine)
18 July 2008	Port Wing, US	daily low max	15.0 C (59.0 F)	0.6 C (1.1 F)	43 years	19 of 100 (Routine)
12 June 2008	Port Wing, US	daily rain	54.6 mm (2.1 in)	31.5 mm (1.2 in)	47 years	50 of 100 (Notable)
28 May 2008	Port Wing, US	daily low min	-1.7 C (28.9 F)	1.1 C (2.0 F)	59 years	25 of 100 (Routine)
27 May 2008	Port Wing, US	daily low min	-3.3 C (26.1 F)	1.6 C (2.9 F)	13 years	13 of 100 (Routine)

Climate Trend

30 complete years, 1948 to 2005

One stripe for each of 30 complete years at Port Wing, 1948 to 2005. Blue stripes are years cooler than the station's own mean of 5.1 C (41.3 F); red stripes are warmer. The coolest year was 1972, at 3.3 C (37.9 F), and the warmest was 2001, at 6.5 C (43.7 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Port Wing as warming stripes, 1948 to 2005
Year	Annual mean temperature	Difference from the station mean
1948	5.3 C	+0.19 C
1949	5.4 C	+0.30 C
1952	5.9 C	+0.75 C
1953	5.6 C	+0.50 C
1954	5.4 C	+0.25 C
1955	5.3 C	+0.11 C
1956	4.9 C	-0.20 C
1957	4.9 C	-0.20 C
1963	5.1 C	-0.03 C
1965	4.2 C	-0.97 C
1966	5.0 C	-0.18 C
1967	4.7 C	-0.46 C
1968	5.6 C	+0.43 C
1969	5.4 C	+0.23 C
1970	4.9 C	-0.26 C
1972	3.3 C	-1.84 C
1973	5.5 C	+0.33 C
1977	4.7 C	-0.49 C
1980	5.2 C	+0.01 C
1982	3.7 C	-1.43 C
1983	5.9 C	+0.77 C
1984	6.0 C	+0.85 C
1994	4.0 C	-1.12 C
1997	5.4 C	+0.29 C
1999	6.4 C	+1.27 C
2000	5.5 C	+0.35 C
2001	6.5 C	+1.35 C
2003	4.5 C	-0.60 C
2004	4.7 C	-0.44 C
2005	5.4 C	+0.27 C

The fitted trend in annual mean temperature here over 1948 to 2005 is 0.02 C (-0.13 to 0.17) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.03 F (-0.24 to 0.30) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Port Wing
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.02 C (-0.13 to 0.17) per decade	0.03 F (-0.24 to 0.30) per decade	1948 to 2005	30	Not clearly different from zero
Mean daily maximum	-0.16 C (-0.32 to 0.01) per decade	-0.28 F (-0.57 to 0.01) per decade	1948 to 2005	30	Not clearly different from zero
Mean daily minimum	0.19 C (-0.02 to 0.39) per decade	0.34 F (-0.03 to 0.71) per decade	1948 to 2005	30	Not clearly different from zero

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1947 to 2008

Yearly extremes at Port Wing: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.3 C (100.9 F)	2006	33.6 C (92.5 F)	56
Coldest night (TNn)	-41.1 C (-42.0 F)	1977	-29.4 C (-20.9 F)	56
Wettest day (Rx1day)	147.3 mm (5.8 in)	1985	46.5 mm (1.8 in)	56
Wettest five days (Rx5day)	172.2 mm (6.8 in)	2005	76.2 mm (3.0 in)	56
Longest dry spell (CDD)	48 days	1969	22 days	56

Hottest day (TXx)

The hottest day of the year at Port Wing, 1947 to 2008. The record is 38.3 C (100.9 F) in 2006, marked on the chart; the median year is 33.6 C (92.5 F).

Hottest day (TXx) at Port Wing by year
Year	Hottest day (TXx)
1947	36.7 C (98.1 F)
1948	35.6 C (96.1 F)
1949	34.4 C (93.9 F)
1950	32.2 C (90.0 F)
1951	32.8 C (91.0 F)
1952	32.2 C (90.0 F)
1953	32.2 C (90.0 F)
1954	31.7 C (89.1 F)
1955	35.0 C (95.0 F)
1956	33.9 C (93.0 F)
1957	31.7 C (89.1 F)
1958	34.4 C (93.9 F)
1959	33.3 C (91.9 F)
1960	33.3 C (91.9 F)
1961	36.7 C (98.1 F)
1962	32.8 C (91.0 F)
1963	34.4 C (93.9 F)
1964	35.0 C (95.0 F)
1965	33.3 C (91.9 F)
1966	34.4 C (93.9 F)
1967	32.2 C (90.0 F)
1968	33.9 C (93.0 F)
1969	35.0 C (95.0 F)
1970	35.0 C (95.0 F)
1971	34.4 C (93.9 F)
1972	32.2 C (90.0 F)
1973	34.4 C (93.9 F)
1974	35.6 C (96.1 F)
1975	11.1 C (52.0 F)
1976	30.0 C (86.0 F)
1977	34.4 C (93.9 F)
1978	34.4 C (93.9 F)
1979	13.3 C (55.9 F)
1980	36.1 C (97.0 F)
1981	33.3 C (91.9 F)
1982	32.2 C (90.0 F)
1983	35.6 C (96.1 F)
1984	34.4 C (93.9 F)
1985	30.6 C (87.1 F)
1992	30.0 C (86.0 F)
1993	32.2 C (90.0 F)
1994	33.3 C (91.9 F)
1995	35.0 C (95.0 F)
1996	27.2 C (81.0 F)
1997	31.7 C (89.1 F)
1998	30.6 C (87.1 F)
1999	34.4 C (93.9 F)
2000	32.2 C (90.0 F)
2001	36.1 C (97.0 F)
2002	35.0 C (95.0 F)
2003	33.9 C (93.0 F)
2004	32.8 C (91.0 F)
2005	35.6 C (96.1 F)
2006	38.3 C (100.9 F)
2007	32.8 C (91.0 F)
2008	31.1 C (88.0 F)

Coldest night (TNn)

The coldest night of the year at Port Wing, 1947 to 2008. The record is -41.1 C (-42.0 F) in 1977, marked on the chart; the median year is -29.4 C (-20.9 F).

Coldest night (TNn) at Port Wing by year
Year	Coldest night (TNn)
1947	-19.4 C (-2.9 F)
1948	-28.9 C (-20.0 F)
1949	-27.8 C (-18.0 F)
1950	-34.4 C (-29.9 F)
1951	-25.0 C (-13.0 F)
1952	-30.6 C (-23.1 F)
1953	-28.3 C (-18.9 F)
1954	-33.9 C (-29.0 F)
1955	-31.1 C (-24.0 F)
1956	-26.7 C (-16.1 F)
1957	-27.2 C (-17.0 F)
1958	-23.9 C (-11.0 F)
1959	-29.4 C (-20.9 F)
1960	-29.4 C (-20.9 F)
1961	-27.8 C (-18.0 F)
1962	-34.4 C (-29.9 F)
1963	-34.4 C (-29.9 F)
1964	-28.9 C (-20.0 F)
1965	-32.2 C (-26.0 F)
1966	-35.0 C (-31.0 F)
1967	-40.0 C (-40.0 F)
1968	-31.1 C (-24.0 F)
1969	-30.0 C (-22.0 F)
1970	-32.2 C (-26.0 F)
1971	-33.3 C (-27.9 F)
1972	-35.6 C (-32.1 F)
1973	-35.6 C (-32.1 F)
1974	-33.3 C (-27.9 F)
1975	-28.9 C (-20.0 F)
1976	-34.4 C (-29.9 F)
1977	-41.1 C (-42.0 F)
1978	-33.3 C (-27.9 F)
1979	-21.1 C (-6.0 F)
1980	-29.4 C (-20.9 F)
1981	-28.9 C (-20.0 F)
1982	-35.6 C (-32.1 F)
1983	-31.7 C (-25.1 F)
1984	-31.7 C (-25.1 F)
1985	-32.2 C (-26.0 F)
1992	-25.0 C (-13.0 F)
1993	-25.6 C (-14.1 F)
1994	-34.4 C (-29.9 F)
1995	-26.1 C (-15.0 F)
1996	-28.9 C (-20.0 F)
1997	-32.8 C (-27.0 F)
1998	-25.0 C (-13.0 F)
1999	-28.3 C (-18.9 F)
2000	-23.3 C (-9.9 F)
2001	-21.7 C (-7.1 F)
2002	-21.1 C (-6.0 F)
2003	-26.7 C (-16.1 F)
2004	-30.6 C (-23.1 F)
2005	-27.8 C (-18.0 F)
2006	-27.8 C (-18.0 F)
2007	-26.7 C (-16.1 F)
2008	-26.7 C (-16.1 F)

Wettest day (Rx1day)

The wettest day of the year at Port Wing, 1947 to 2008. The record is 147.3 mm (5.8 in) in 1985, marked on the chart; the median year is 46.5 mm (1.8 in).

Wettest day (Rx1day) at Port Wing by year
Year	Wettest day (Rx1day)
1947	67.3 mm (2.6 in)
1948	31.0 mm (1.2 in)
1949	84.3 mm (3.3 in)
1950	38.1 mm (1.5 in)
1951	75.4 mm (3.0 in)
1952	49.5 mm (1.9 in)
1953	73.7 mm (2.9 in)
1954	68.6 mm (2.7 in)
1955	107.7 mm (4.2 in)
1956	28.7 mm (1.1 in)
1957	82.3 mm (3.2 in)
1958	73.4 mm (2.9 in)
1959	45.0 mm (1.8 in)
1960	50.3 mm (2.0 in)
1961	43.9 mm (1.7 in)
1962	30.5 mm (1.2 in)
1963	36.1 mm (1.4 in)
1964	69.9 mm (2.8 in)
1965	35.6 mm (1.4 in)
1966	33.0 mm (1.3 in)
1967	52.6 mm (2.1 in)
1968	48.0 mm (1.9 in)
1969	33.0 mm (1.3 in)
1970	76.7 mm (3.0 in)
1971	30.5 mm (1.2 in)
1972	53.3 mm (2.1 in)
1973	51.8 mm (2.0 in)
1974	41.9 mm (1.6 in)
1975	22.9 mm (0.9 in)
1976	9.1 mm (0.36 in)
1977	61.0 mm (2.4 in)
1978	102.6 mm (4.0 in)
1979	15.2 mm (0.6 in)
1980	40.9 mm (1.6 in)
1981	40.4 mm (1.6 in)
1982	71.6 mm (2.8 in)
1983	53.8 mm (2.1 in)
1984	74.4 mm (2.9 in)
1985	147.3 mm (5.8 in)
1992	56.1 mm (2.2 in)
1993	31.5 mm (1.2 in)
1994	40.6 mm (1.6 in)
1995	39.4 mm (1.6 in)
1996	40.6 mm (1.6 in)
1997	38.1 mm (1.5 in)
1998	42.9 mm (1.7 in)
1999	108.7 mm (4.3 in)
2000	42.4 mm (1.7 in)
2001	82.0 mm (3.2 in)
2002	43.2 mm (1.7 in)
2003	33.5 mm (1.3 in)
2004	43.2 mm (1.7 in)
2005	97.3 mm (3.8 in)
2006	59.7 mm (2.4 in)
2007	41.1 mm (1.6 in)
2008	54.6 mm (2.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Port Wing, 1947 to 2008. The record is 172.2 mm (6.8 in) in 2005, marked on the chart; the median year is 76.2 mm (3.0 in).

Wettest five days (Rx5day) at Port Wing by year
Year	Wettest five days (Rx5day)
1947	35.8 mm (1.4 in)
1948	51.4 mm (2.0 in)
1949	117.8 mm (4.6 in)
1950	39.4 mm (1.6 in)
1951	101.8 mm (4.0 in)
1952	76.7 mm (3.0 in)
1953	100.4 mm (4.0 in)
1954	95.8 mm (3.8 in)
1955	138.1 mm (5.4 in)
1956	44.9 mm (1.8 in)
1957	118.3 mm (4.7 in)
1958	91.2 mm (3.6 in)
1959	65.6 mm (2.6 in)
1960	61.9 mm (2.4 in)
1961	78.5 mm (3.1 in)
1962	76.2 mm (3.0 in)
1963	39.1 mm (1.5 in)
1964	74.7 mm (2.9 in)
1965	59.9 mm (2.4 in)
1966	47.5 mm (1.9 in)
1967	81.8 mm (3.2 in)
1968	81.3 mm (3.2 in)
1969	42.2 mm (1.7 in)
1970	116.6 mm (4.6 in)
1971	55.7 mm (2.2 in)
1972	88.2 mm (3.5 in)
1973	91.7 mm (3.6 in)
1974	67.3 mm (2.6 in)
1975	44.5 mm (1.8 in)
1976	10.1 mm (0.4 in)
1977	82.9 mm (3.3 in)
1978	112.5 mm (4.4 in)
1979	26.3 mm (1.0 in)
1980	76.4 mm (3.0 in)
1981	53.9 mm (2.1 in)
1982	166.8 mm (6.6 in)
1983	64.5 mm (2.5 in)
1984	120.7 mm (4.8 in)
1985	167.6 mm (6.6 in)
1992	76.2 mm (3.0 in)
1993	64.8 mm (2.6 in)
1994	68.6 mm (2.7 in)
1995	58.9 mm (2.3 in)
1996	50.8 mm (2.0 in)
1997	88.9 mm (3.5 in)
1998	91.4 mm (3.6 in)
1999	129.5 mm (5.1 in)
2000	57.6 mm (2.3 in)
2001	170.0 mm (6.7 in)
2002	61.0 mm (2.4 in)
2003	47.7 mm (1.9 in)
2004	57.4 mm (2.3 in)
2005	172.2 mm (6.8 in)
2006	102.9 mm (4.1 in)
2007	114.3 mm (4.5 in)
2008	59.9 mm (2.4 in)

Longest dry spell (CDD)

The longest dry spell of the year at Port Wing, 1947 to 2008. The record is 48 days in 1969, marked on the chart; the median year is 22 days.

Longest dry spell (CDD) at Port Wing by year
Year	Longest dry spell (CDD)
1947	14 days
1948	25 days
1949	18 days
1950	20 days
1951	14 days
1952	33 days
1953	18 days
1954	17 days
1955	14 days
1956	20 days
1957	22 days
1958	38 days
1959	27 days
1960	35 days
1961	41 days
1962	27 days
1963	26 days
1964	27 days
1965	18 days
1966	23 days
1967	30 days
1968	21 days
1969	48 days
1970	22 days
1971	18 days
1972	26 days
1973	17 days
1974	24 days
1975	25 days
1976	47 days
1977	26 days
1978	24 days
1979	18 days
1980	27 days
1981	24 days
1982	22 days
1983	17 days
1984	35 days
1985	20 days
1992	20 days
1993	14 days
1994	14 days
1995	12 days
1996	25 days
1997	23 days
1998	35 days
1999	18 days
2000	11 days
2001	19 days
2002	13 days
2003	25 days
2004	17 days
2005	19 days
2006	16 days
2007	24 days
2008	19 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

30 years with a frost

Across 30 years with a frost, the median last spring frost at Port Wing falls on 23 May and the median first autumn frost on 27 September, which leaves a median of 129 days between them.

Fitted over all years, the growing season changes by +3.7 days per decade at this station.

Frost dates and growing season at Port Wing
Measure	Median, all years	Earliest period	Recent period (1948 to 2005)	Recent against earliest	Fitted trend
Last spring frost	23 May	n/a	23 May	n/a	-1.2 days per decade
First autumn frost	27 September	n/a	27 September	n/a	+2.5 days per decade
Growing days	129 days	n/a	129 days	n/a	+3.7 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

30 years, 1948 to 2005

A day with at least 52.9 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 136.2 mm (5.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Port Wing: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	52.9 mm (2.1 in)
5 years	74.4 mm (2.9 in)
10 years	88.9 mm (3.5 in)
25 years	107.6 mm (4.2 in)
50 years	121.8 mm (4.8 in)	Longer than the 30 years of record
100 years	136.2 mm (5.4 in)	Longer than the 30 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 30 years of values from 1948 to 2005.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 107.7 mm (4.2 in) in 1955; 102.6 mm (4.0 in) in 1978; 97.3 mm (3.8 in) in 2005.

Download the Data

Data for Port Wing standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Port Wing threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).