Copper Harbor Ft Wilkins Weather Records (USC00201780)

Record envelope, standing records and threshold days for Copper Harbor Ft Wilkins (USC00201780), Michigan, United States, with 79 years of record.

Key Facts for Copper Harbor Ft Wilkins

Copper Harbor Ft Wilkins (USC00201780) is a weather station in Michigan, United States at 47.47 latitude and -87.87 longitude, 191 m (625 ft) above sea level.
The station reports from 1948 to 2026, 79 years of record.
1,464 records set at Copper Harbor Ft Wilkins still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Copper Harbor Ft Wilkins set a daily record precipitation of 7.6 mm (0.30 in) on 8 September 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

Location: Michigan, United States, 47.47 latitude, -87.87 longitude.
Elevation: 191 m (625 ft).
Period of record: 1948 to 2026, 79 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 Copper Harbor Ft Wilkins. 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 Copper Harbor Ft Wilkins, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	7.8 C (46.0 F)	-27.8 C (-18.0 F)	n/a	n/a
Feb	12.8 C (55.0 F)	-30.0 C (-22.0 F)	n/a	n/a
Mar	23.9 C (75.0 F)	-30.6 C (-23.1 F)	n/a	n/a
Apr	26.7 C (80.1 F)	-18.9 C (-2.0 F)	n/a	n/a
May	31.7 C (89.1 F)	-8.9 C (16.0 F)	n/a	n/a
Jun	34.4 C (93.9 F)	-0.6 C (30.9 F)	n/a	n/a
Jul	37.2 C (99.0 F)	5.6 C (42.1 F)	n/a	n/a
Aug	34.4 C (93.9 F)	0.0 C (32.0 F)	n/a	n/a
Sep	35.0 C (95.0 F)	-1.1 C (30.0 F)	n/a	n/a
Oct	28.3 C (82.9 F)	-6.1 C (21.0 F)	n/a	n/a
Nov	21.7 C (71.1 F)	-20.6 C (-5.1 F)	n/a	n/a
Dec	13.3 C (55.9 F)	-23.9 C (-11.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Copper Harbor Ft Wilkins still stand. 1991 holds the most, with 72.

Standing records at Copper Harbor Ft Wilkins by the year they were set
Year set	Standing records
1972	13
1973	34
1974	30
1975	20
1976	59
1977	27
1984	21
1985	21
1986	6
1987	32
1988	32
1989	65
1990	39
1991	72
1992	42
1993	34
1994	51
1995	37
1996	49
1997	40
1998	56
1999	41
2000	43
2001	36
2002	30
2003	30
2004	28
2005	48
2006	14
2007	37
2008	30
2009	34
2010	40
2011	24
2012	26
2013	49
2014	63
2015	18
2016	18
2017	42
2018	27
2019	6

All-Time Record Progression

1 new records

1 all-time records were set at Copper Harbor Ft Wilkins between 28 March 2014 and 28 March 2014. Each dot is a new record.

Wettest Day of Each Month

May: 139.7 mm (5.5 in)

The wettest day on record for each calendar month at Copper Harbor Ft Wilkins. The most was 139.7 mm (5.5 in) on 30 May 2002.

Record daily precipitation for each month at Copper Harbor Ft Wilkins
Month	Record daily precipitation (mm)	Date
Jan	71.9 mm (2.8 in)	11 January 2019
Feb	24.4 mm (1.0 in)	26 February 1951
Mar	43.2 mm (1.7 in)	8 March 2002
Apr	49.5 mm (1.9 in)	11 April 2002
May	139.7 mm (5.5 in)	30 May 2002
Jun	89.4 mm (3.5 in)	29 June 1996
Jul	62.2 mm (2.4 in)	19 July 2013
Aug	66.5 mm (2.6 in)	17 August 1988
Sep	65.5 mm (2.6 in)	26 September 1973
Oct	46.7 mm (1.8 in)	23 October 2004
Nov	103.1 mm (4.1 in)	2 November 1985
Dec	28.4 mm (1.1 in)	15 December 1996

Period of Record Coverage

1972 to 2020

43 years of record at Copper Harbor Ft Wilkins, 1972 to 2020. 25 years have data for under 90 percent of days and are left out of rankings: 1972, 1973, 1974, 1975, 1976, 1977, 1984, 1985 and others.

Days with data per year at Copper Harbor Ft Wilkins
Year	Days with data	Share of year	Complete
1972	119	33%	No
1973	325	89%	No
1974	239	65%	No
1975	254	70%	No
1976	169	46%	No
1977	156	43%	No
1984	138	38%	No
1985	179	49%	No
1986	67	18%	No
1987	258	71%	No
1988	259	71%	No
1989	343	94%	Yes
1990	315	86%	No
1991	350	96%	Yes
1992	354	97%	Yes
1993	353	97%	Yes
1994	358	98%	Yes
1995	359	98%	Yes
1996	357	98%	Yes
1997	360	99%	Yes
1998	350	96%	Yes
1999	279	76%	No
2000	321	88%	No
2001	274	75%	No
2002	298	82%	No
2003	300	82%	No
2004	305	83%	No
2005	353	97%	Yes
2006	122	33%	No
2007	334	92%	Yes
2008	366	100%	Yes
2009	362	99%	Yes
2010	341	93%	Yes
2011	359	98%	Yes
2012	349	95%	Yes
2013	347	95%	Yes
2014	289	79%	No
2015	143	39%	No
2016	273	75%	No
2017	331	91%	Yes
2018	317	87%	No
2019	99	27%	No
2020	23	6%	No

Latest Records

Latest records at Copper Harbor Ft Wilkins
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
8 September 2026	Copper Harbor Ft Wilkins, US	daily rain (Provisional)	7.6 mm (0.30 in)	1.2 mm (0.05 in)	24 years	15 of 100 (Routine)
17 July 2026	Copper Harbor Ft Wilkins, US	daily rain	21.2 mm (0.8 in)	5.7 mm (0.22 in)	76 years	20 of 100 (Routine)
12 April 2026	Copper Harbor Ft Wilkins, US	daily rain	10.4 mm (0.4 in)	2.8 mm (0.11 in)	75 years	20 of 100 (Routine)
3 April 2026	Copper Harbor Ft Wilkins, US	daily rain	8.6 mm (0.34 in)	1.7 mm (0.07 in)	40 years	20 of 100 (Routine)
20 January 2020	Copper Harbor Ft Wilkins, US	daily snowfall	30.5 cm (12.0 in)	12.7 cm (5.0 in)	32 years	39 of 100 (Notable)
14 January 2020	Copper Harbor Ft Wilkins, US	daily rain	7.6 mm (0.30 in)	2.3 mm (0.09 in)	28 years	19 of 100 (Routine)
31 December 2019	Copper Harbor Ft Wilkins, US	daily rain	27.9 mm (1.1 in)	10.6 mm (0.4 in)	26 years	39 of 100 (Notable)
23 December 2019	Copper Harbor Ft Wilkins, US	daily high max	6.1 C (43.0 F)	1.7 C (3.1 F)	28 years	15 of 100 (Routine)
23 December 2019	Copper Harbor Ft Wilkins, US	daily high min	0.6 C (33.1 F)	1.2 C (2.2 F)	13 years	10 of 100 (Routine)
12 December 2019	Copper Harbor Ft Wilkins, US	daily snowfall	7.6 cm (3.0 in)	0.7 cm (0.3 in)	5 years	9 of 100 (Routine)
11 December 2019	Copper Harbor Ft Wilkins, US	daily snowfall	17.8 cm (7.0 in)	4.6 cm (1.8 in)	29 years	24 of 100 (Routine)
27 November 2019	Copper Harbor Ft Wilkins, US	daily snowfall	10.2 cm (4.0 in)	1.8 cm (0.7 in)	12 years	14 of 100 (Routine)
18 November 2019	Copper Harbor Ft Wilkins, US	daily low min	-13.3 C (8.1 F)	2.7 C (4.9 F)	29 years	18 of 100 (Routine)
14 November 2019	Copper Harbor Ft Wilkins, US	daily snowfall	7.6 cm (3.0 in)	2.5 cm (1.0 in)	18 years	18 of 100 (Routine)
14 November 2019	Copper Harbor Ft Wilkins, US	daily low max (Tie)	-2.8 C (27.0 F)	tie	22 years	2 of 100 (Routine)
12 November 2019	Copper Harbor Ft Wilkins, US	daily low min	-11.7 C (10.9 F)	0.6 C (1.1 F)	32 years	14 of 100 (Routine)
12 November 2019	Copper Harbor Ft Wilkins, US	daily low max (Tie)	-5.6 C (21.9 F)	tie	32 years	3 of 100 (Routine)
13 September 2019	Copper Harbor Ft Wilkins, US	daily rain	40.6 mm (1.6 in)	18.5 mm (0.7 in)	13 years	31 of 100 (Routine)
16 July 2019	Copper Harbor Ft Wilkins, US	daily rain	24.9 mm (1.0 in)	18.5 mm (0.7 in)	17 years	20 of 100 (Routine)
11 January 2019	Copper Harbor Ft Wilkins, US	monthly rain	71.9 mm (2.8 in)	32.3 mm (1.3 in)	22 years	63 of 100 (Major)

Climate Trend

14 complete years, 1989 to 2017

One stripe for each of 14 complete years at Copper Harbor Ft Wilkins, 1989 to 2017. Blue stripes are years cooler than the station's own mean of 5.0 C (41.0 F); red stripes are warmer. The coolest year was 1996, at 3.8 C (38.8 F), and the warmest was 1998, at 7.6 C (45.6 F). The strongest colour marks a difference of 2.6 C (4.7 F).

Annual mean temperature at Copper Harbor Ft Wilkins as warming stripes, 1989 to 2017
Year	Annual mean temperature	Difference from the station mean
1989	4.2 C	-0.80 C
1991	5.6 C	+0.56 C
1992	5.0 C	-0.04 C
1993	4.6 C	-0.41 C
1994	5.0 C	-0.02 C
1995	5.3 C	+0.30 C
1996	3.8 C	-1.25 C
1997	4.9 C	-0.08 C
1998	7.6 C	+2.57 C
2008	5.2 C	+0.14 C
2009	5.0 C	0.00 C
2011	5.3 C	+0.26 C
2013	4.0 C	-1.01 C
2017	4.9 C	-0.16 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1948 to 2026

Yearly extremes at Copper Harbor Ft Wilkins: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.2 C (99.0 F)	1988	31.1 C (88.0 F)	43
Coldest night (TNn)	-30.6 C (-23.1 F)	2003	-21.7 C (-7.1 F)	43
Wettest day (Rx1day)	139.7 mm (5.5 in)	2002	44.1 mm (1.7 in)	48
Wettest five days (Rx5day)	155.0 mm (6.1 in)	2002	64.3 mm (2.5 in)	48
Longest dry spell (CDD)	28 days	1999	16 days	48

Hottest day (TXx)

The hottest day of the year at Copper Harbor Ft Wilkins, 1948 to 2026. The record is 37.2 C (99.0 F) in 1988, marked on the chart; the median year is 31.1 C (88.0 F).

Hottest day (TXx) at Copper Harbor Ft Wilkins by year
Year	Hottest day (TXx)
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1972	31.1 C (88.0 F)
1973	32.2 C (90.0 F)
1974	30.6 C (87.1 F)
1975	33.9 C (93.0 F)
1976	34.4 C (93.9 F)
1977	27.8 C (82.0 F)
1984	30.0 C (86.0 F)
1985	29.4 C (84.9 F)
1986	21.7 C (71.1 F)
1987	30.6 C (87.1 F)
1988	37.2 C (99.0 F)
1989	32.8 C (91.0 F)
1990	30.0 C (86.0 F)
1991	32.8 C (91.0 F)
1992	30.0 C (86.0 F)
1993	31.1 C (88.0 F)
1994	28.3 C (82.9 F)
1995	33.9 C (93.0 F)
1996	30.0 C (86.0 F)
1997	30.6 C (87.1 F)
1998	35.0 C (95.0 F)
1999	35.0 C (95.0 F)
2000	30.6 C (87.1 F)
2001	34.4 C (93.9 F)
2002	35.6 C (96.1 F)
2003	33.3 C (91.9 F)
2004	30.0 C (86.0 F)
2005	33.9 C (93.0 F)
2006	33.3 C (91.9 F)
2007	33.9 C (93.0 F)
2008	31.1 C (88.0 F)
2009	30.6 C (87.1 F)
2010	31.7 C (89.1 F)
2011	31.7 C (89.1 F)
2012	31.7 C (89.1 F)
2013	31.1 C (88.0 F)
2014	30.6 C (87.1 F)
2015	31.1 C (88.0 F)
2016	30.6 C (87.1 F)
2017	29.4 C (84.9 F)
2018	30.6 C (87.1 F)
2019	28.3 C (82.9 F)
2020	1.1 C (34.0 F)
2023	n/a
2026	n/a

Coldest night (TNn)

The coldest night of the year at Copper Harbor Ft Wilkins, 1948 to 2026. The record is -30.6 C (-23.1 F) in 2003, marked on the chart; the median year is -21.7 C (-7.1 F).

Coldest night (TNn) at Copper Harbor Ft Wilkins by year
Year	Coldest night (TNn)
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1972	-19.4 C (-2.9 F)
1973	-18.9 C (-2.0 F)
1974	-28.9 C (-20.0 F)
1975	-20.0 C (-4.0 F)
1976	-23.9 C (-11.0 F)
1977	-26.1 C (-15.0 F)
1984	-18.9 C (-2.0 F)
1985	-27.2 C (-17.0 F)
1986	-13.3 C (8.1 F)
1987	-22.2 C (-8.0 F)
1988	-27.2 C (-17.0 F)
1989	-25.6 C (-14.1 F)
1990	-21.7 C (-7.1 F)
1991	-27.2 C (-17.0 F)
1992	-20.6 C (-5.1 F)
1993	-22.2 C (-8.0 F)
1994	-30.0 C (-22.0 F)
1995	-21.1 C (-6.0 F)
1996	-28.9 C (-20.0 F)
1997	-25.0 C (-13.0 F)
1998	-17.8 C (0.0 F)
1999	-24.4 C (-11.9 F)
2000	-20.6 C (-5.1 F)
2001	-21.1 C (-6.0 F)
2002	-18.3 C (-0.9 F)
2003	-30.6 C (-23.1 F)
2004	-20.6 C (-5.1 F)
2005	-22.8 C (-9.0 F)
2006	-9.4 C (15.1 F)
2007	-22.8 C (-9.0 F)
2008	-22.2 C (-8.0 F)
2009	-27.8 C (-18.0 F)
2010	-17.8 C (0.0 F)
2011	-20.6 C (-5.1 F)
2012	-21.7 C (-7.1 F)
2013	-21.7 C (-7.1 F)
2014	-27.8 C (-18.0 F)
2015	-5.6 C (21.9 F)
2016	-21.7 C (-7.1 F)
2017	-20.6 C (-5.1 F)
2018	-21.7 C (-7.1 F)
2019	-20.0 C (-4.0 F)
2020	-13.3 C (8.1 F)
2023	n/a
2026	n/a

Wettest day (Rx1day)

The wettest day of the year at Copper Harbor Ft Wilkins, 1948 to 2026. The record is 139.7 mm (5.5 in) in 2002, marked on the chart; the median year is 44.1 mm (1.7 in).

Wettest day (Rx1day) at Copper Harbor Ft Wilkins by year
Year	Wettest day (Rx1day)
1948	34.5 mm (1.4 in)
1949	31.0 mm (1.2 in)
1950	62.7 mm (2.5 in)
1951	48.0 mm (1.9 in)
1972	33.0 mm (1.3 in)
1973	65.5 mm (2.6 in)
1974	43.4 mm (1.7 in)
1975	39.1 mm (1.5 in)
1976	24.9 mm (1.0 in)
1977	18.8 mm (0.7 in)
1984	58.9 mm (2.3 in)
1985	103.1 mm (4.1 in)
1986	45.2 mm (1.8 in)
1987	27.7 mm (1.1 in)
1988	66.5 mm (2.6 in)
1989	35.1 mm (1.4 in)
1990	40.9 mm (1.6 in)
1991	40.1 mm (1.6 in)
1992	36.3 mm (1.4 in)
1993	33.5 mm (1.3 in)
1994	54.6 mm (2.1 in)
1995	41.1 mm (1.6 in)
1996	89.4 mm (3.5 in)
1997	39.6 mm (1.6 in)
1998	48.3 mm (1.9 in)
1999	53.3 mm (2.1 in)
2000	47.8 mm (1.9 in)
2001	25.7 mm (1.0 in)
2002	139.7 mm (5.5 in)
2003	47.0 mm (1.9 in)
2004	54.9 mm (2.2 in)
2005	46.2 mm (1.8 in)
2006	67.8 mm (2.7 in)
2007	24.9 mm (1.0 in)
2008	21.1 mm (0.8 in)
2009	50.0 mm (2.0 in)
2010	31.8 mm (1.3 in)
2011	58.9 mm (2.3 in)
2012	48.8 mm (1.9 in)
2013	62.2 mm (2.4 in)
2014	44.7 mm (1.8 in)
2015	27.7 mm (1.1 in)
2016	36.8 mm (1.4 in)
2017	56.9 mm (2.2 in)
2018	40.1 mm (1.6 in)
2019	71.9 mm (2.8 in)
2020	7.6 mm (0.30 in)
2023	n/a
2026	21.2 mm (0.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Copper Harbor Ft Wilkins, 1948 to 2026. The record is 155.0 mm (6.1 in) in 2002, marked on the chart; the median year is 64.3 mm (2.5 in).

Wettest five days (Rx5day) at Copper Harbor Ft Wilkins by year
Year	Wettest five days (Rx5day)
1948	67.0 mm (2.6 in)
1949	55.7 mm (2.2 in)
1950	90.4 mm (3.6 in)
1951	66.6 mm (2.6 in)
1972	43.4 mm (1.7 in)
1973	90.8 mm (3.6 in)
1974	79.3 mm (3.1 in)
1975	68.4 mm (2.7 in)
1976	55.1 mm (2.2 in)
1977	26.2 mm (1.0 in)
1984	92.1 mm (3.6 in)
1985	113.0 mm (4.4 in)
1986	57.4 mm (2.3 in)
1987	43.4 mm (1.7 in)
1988	146.0 mm (5.7 in)
1989	45.2 mm (1.8 in)
1990	74.4 mm (2.9 in)
1991	68.8 mm (2.7 in)
1992	56.6 mm (2.2 in)
1993	55.7 mm (2.2 in)
1994	98.8 mm (3.9 in)
1995	51.6 mm (2.0 in)
1996	89.4 mm (3.5 in)
1997	61.5 mm (2.4 in)
1998	81.1 mm (3.2 in)
1999	80.0 mm (3.1 in)
2000	55.0 mm (2.2 in)
2001	30.3 mm (1.2 in)
2002	155.0 mm (6.1 in)
2003	67.8 mm (2.7 in)
2004	98.8 mm (3.9 in)
2005	77.7 mm (3.1 in)
2006	100.1 mm (3.9 in)
2007	41.7 mm (1.6 in)
2008	45.3 mm (1.8 in)
2009	91.1 mm (3.6 in)
2010	48.6 mm (1.9 in)
2011	91.9 mm (3.6 in)
2012	62.0 mm (2.4 in)
2013	53.4 mm (2.1 in)
2014	39.1 mm (1.5 in)
2015	43.4 mm (1.7 in)
2016	43.2 mm (1.7 in)
2017	106.5 mm (4.2 in)
2018	69.6 mm (2.7 in)
2019	27.4 mm (1.1 in)
2020	8.1 mm (0.32 in)
2023	n/a
2026	30.0 mm (1.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at Copper Harbor Ft Wilkins, 1948 to 2026. The record is 28 days in 1999, marked on the chart; the median year is 16 days.

Longest dry spell (CDD) at Copper Harbor Ft Wilkins by year
Year	Longest dry spell (CDD)
1948	22 days
1949	18 days
1950	13 days
1951	15 days
1972	12 days
1973	17 days
1974	19 days
1975	23 days
1976	18 days
1977	11 days
1984	10 days
1985	10 days
1986	15 days
1987	26 days
1988	12 days
1989	25 days
1990	23 days
1991	25 days
1992	16 days
1993	12 days
1994	16 days
1995	20 days
1996	15 days
1997	26 days
1998	25 days
1999	28 days
2000	18 days
2001	15 days
2002	20 days
2003	18 days
2004	12 days
2005	16 days
2006	13 days
2007	18 days
2008	14 days
2009	28 days
2010	23 days
2011	19 days
2012	11 days
2013	11 days
2014	15 days
2015	10 days
2016	17 days
2017	8 days
2018	20 days
2019	10 days
2020	4 days
2023	n/a
2026	16 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.

Download the Data

Data for Copper Harbor Ft Wilkins standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Copper Harbor Ft Wilkins 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-14. Last revised 14 October 2026 (2026-10-14).