St Ignace Mackinac Br Weather Records (USC00207274)

Record envelope, standing records and threshold days for St Ignace Mackinac Br (USC00207274), Michigan, United States, with 37 years of record.

Key Facts for St Ignace Mackinac Br

St Ignace Mackinac Br (USC00207274) is a weather station in Michigan, United States at 45.85 latitude and -84.72 longitude, 181 m (595 ft) above sea level.
The station reports from 1973 to 2009, 37 years of record.
1,464 records set at St Ignace Mackinac Br still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
St Ignace Mackinac Br tied a daily record high minimum temperature of 16.1 C (61.0 F) on 23 September 2009.

About the Station

Location: Michigan, United States, 45.85 latitude, -84.72 longitude.
Elevation: 181 m (595 ft).
Period of record: 1973 to 2009, 37 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 St Ignace Mackinac Br. 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 St Ignace Mackinac Br, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	8.9 C (48.0 F)	-32.8 C (-27.0 F)	n/a	n/a
Feb	13.9 C (57.0 F)	-33.9 C (-29.0 F)	n/a	n/a
Mar	16.7 C (62.1 F)	-27.2 C (-17.0 F)	n/a	n/a
Apr	25.6 C (78.1 F)	-17.2 C (1.0 F)	n/a	n/a
May	28.9 C (84.0 F)	-5.6 C (21.9 F)	n/a	n/a
Jun	31.1 C (88.0 F)	1.1 C (34.0 F)	n/a	n/a
Jul	36.7 C (98.1 F)	1.7 C (35.1 F)	n/a	n/a
Aug	33.9 C (93.0 F)	3.3 C (37.9 F)	n/a	n/a
Sep	31.7 C (89.1 F)	-3.3 C (26.1 F)	n/a	n/a
Oct	26.7 C (80.1 F)	-6.7 C (19.9 F)	n/a	n/a
Nov	19.4 C (66.9 F)	-13.9 C (7.0 F)	n/a	n/a
Dec	15.6 C (60.1 F)	-26.7 C (-16.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at St Ignace Mackinac Br still stand. 1981 holds the most, with 61.

Standing records at St Ignace Mackinac Br by the year they were set
Year set	Standing records
1973	2
1974	46
1975	48
1976	58
1977	43
1978	25
1979	54
1980	49
1981	61
1982	52
1983	43
1984	35
1985	40
1986	32
1987	40
1988	27
1989	59
1990	35
1991	47
1992	42
1993	38
1994	43
1995	37
1996	28
1997	28
1998	44
1999	54
2000	45
2001	35
2002	42
2003	22
2004	33
2005	46
2006	34
2007	50
2008	26
2009	21

All-Time Record Progression

2 new records

2 all-time records were set at St Ignace Mackinac Br between 1 August 2006 and 20 October 2008. Each dot is a new record.

When St Ignace Mackinac Br set new all-time records
Date	Kind	Detail
2006-08-01	Record high minimum temperature	Record high minimum temperature 24.4 C (75.9 F)
2008-10-20	Record daily precipitation	Record daily precipitation 106.7 mm (4.2 in)

Wettest Day of Each Month

Oct: 106.7 mm (4.2 in)

The wettest day on record for each calendar month at St Ignace Mackinac Br. The most was 106.7 mm (4.2 in) on 20 October 2008.

Record daily precipitation for each month at St Ignace Mackinac Br
Month	Record daily precipitation (mm)	Date
Jan	63.5 mm (2.5 in)	20 January 1995
Feb	50.8 mm (2.0 in)	7 February 1988
Mar	77.5 mm (3.1 in)	24 March 1996
Apr	44.5 mm (1.8 in)	9 April 1980
May	40.6 mm (1.6 in)	25 May 1989
Jun	59.7 mm (2.4 in)	7 June 1987
Jul	76.2 mm (3.0 in)	3 July 1977
Aug	71.6 mm (2.8 in)	9 August 2001
Sep	50.8 mm (2.0 in)	24 September 2006
Oct	106.7 mm (4.2 in)	20 October 2008
Nov	68.3 mm (2.7 in)	23 November 2003
Dec	102.4 mm (4.0 in)	21 December 1984

Period of Record Coverage

1973 to 2009

37 years of record at St Ignace Mackinac Br, 1973 to 2009. 8 years have data for under 90 percent of days and are left out of rankings: 1973, 1978, 1979, 1983, 1984, 1987, 1988, 2009.

Days with data per year at St Ignace Mackinac Br
Year	Days with data	Share of year	Complete
1973	29	8%	No
1974	356	98%	Yes
1975	361	99%	Yes
1976	361	99%	Yes
1977	357	98%	Yes
1978	299	82%	No
1979	308	84%	No
1980	363	99%	Yes
1981	364	100%	Yes
1982	360	99%	Yes
1983	295	81%	No
1984	303	83%	No
1985	350	96%	Yes
1986	353	97%	Yes
1987	322	88%	No
1988	322	88%	No
1989	357	98%	Yes
1990	361	99%	Yes
1991	332	91%	Yes
1992	363	99%	Yes
1993	363	99%	Yes
1994	349	96%	Yes
1995	365	100%	Yes
1996	334	91%	Yes
1997	361	99%	Yes
1998	363	99%	Yes
1999	359	98%	Yes
2000	358	98%	Yes
2001	357	98%	Yes
2002	351	96%	Yes
2003	342	94%	Yes
2004	356	97%	Yes
2005	353	97%	Yes
2006	359	98%	Yes
2007	353	97%	Yes
2008	348	95%	Yes
2009	255	70%	No

Latest Records

Latest records at St Ignace Mackinac Br
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
23 September 2009	St Ignace Mackinac Br, US	daily high min (Tie)	16.1 C (61.0 F)	tie	15 years	1 of 100 (Routine)
22 August 2009	St Ignace Mackinac Br, US	daily low max	18.9 C (66.0 F)	0.5 C (0.9 F)	4 years	5 of 100 (Routine)
19 August 2009	St Ignace Mackinac Br, US	daily high max	30.0 C (86.0 F)	1.1 C (2.0 F)	26 years	13 of 100 (Routine)
17 August 2009	St Ignace Mackinac Br, US	daily high min	21.1 C (70.0 F)	0.5 C (0.9 F)	26 years	11 of 100 (Routine)
16 August 2009	St Ignace Mackinac Br, US	daily high max	29.4 C (84.9 F)	1.1 C (2.0 F)	22 years	12 of 100 (Routine)
15 August 2009	St Ignace Mackinac Br, US	daily rain	36.6 mm (1.4 in)	18.8 mm (0.7 in)	12 years	22 of 100 (Routine)
14 August 2009	St Ignace Mackinac Br, US	daily rain	20.1 mm (0.8 in)	2.6 mm (0.10 in)	7 years	7 of 100 (Routine)
1 August 2009	St Ignace Mackinac Br, US	daily low max (Tie)	21.1 C (70.0 F)	tie	14 years	1 of 100 (Routine)
25 July 2009	St Ignace Mackinac Br, US	daily rain (Tie)	12.7 mm (0.5 in)	tie	30 years	3 of 100 (Routine)
23 July 2009	St Ignace Mackinac Br, US	daily low max	19.4 C (66.9 F)	1.7 C (3.1 F)	16 years	13 of 100 (Routine)
19 July 2009	St Ignace Mackinac Br, US	daily low max	18.3 C (64.9 F)	1.1 C (2.0 F)	8 years	8 of 100 (Routine)
18 July 2009	St Ignace Mackinac Br, US	daily low max	17.2 C (63.0 F)	2.2 C (4.0 F)	14 years	14 of 100 (Routine)
25 June 2009	St Ignace Mackinac Br, US	daily high max (Tie)	28.9 C (84.0 F)	tie	28 years	2 of 100 (Routine)
25 June 2009	St Ignace Mackinac Br, US	daily high min (Tie)	17.8 C (64.0 F)	tie	4 years	1 of 100 (Routine)
24 June 2009	St Ignace Mackinac Br, US	daily high max (Tie)	28.3 C (82.9 F)	tie	6 years	1 of 100 (Routine)
23 June 2009	St Ignace Mackinac Br, US	daily high min (Tie)	17.2 C (63.0 F)	tie	10 years	1 of 100 (Routine)
8 June 2009	St Ignace Mackinac Br, US	daily rain	12.4 mm (0.5 in)	2.2 mm (0.09 in)	22 years	11 of 100 (Routine)
6 June 2009	St Ignace Mackinac Br, US	daily low min	2.2 C (36.0 F)	0.6 C (1.1 F)	2 years	4 of 100 (Routine)
1 June 2009	St Ignace Mackinac Br, US	daily low max	11.7 C (53.1 F)	0.5 C (0.9 F)	16 years	8 of 100 (Routine)
31 May 2009	St Ignace Mackinac Br, US	daily low min (Tie)	1.7 C (35.1 F)	tie	28 years	2 of 100 (Routine)

Climate Trend

24 complete years, 1974 to 2008

One stripe for each of 24 complete years at St Ignace Mackinac Br, 1974 to 2008. Blue stripes are years cooler than the station's own mean of 6.3 C (43.4 F); red stripes are warmer. The coolest year was 1989, at 4.9 C (40.7 F), and the warmest was 1998, at 8.3 C (46.9 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at St Ignace Mackinac Br as warming stripes, 1974 to 2008
Year	Annual mean temperature	Difference from the station mean
1974	5.5 C	-0.81 C
1975	6.7 C	+0.37 C
1976	5.4 C	-0.95 C
1980	5.0 C	-1.28 C
1981	5.7 C	-0.58 C
1982	5.1 C	-1.21 C
1985	5.4 C	-0.96 C
1986	6.0 C	-0.30 C
1989	4.9 C	-1.47 C
1990	6.4 C	+0.05 C
1992	5.3 C	-1.01 C
1993	5.3 C	-1.02 C
1995	6.0 C	-0.37 C
1997	5.7 C	-0.66 C
1998	8.3 C	+1.94 C
1999	7.9 C	+1.55 C
2000	6.9 C	+0.62 C
2001	7.7 C	+1.39 C
2002	7.1 C	+0.77 C
2004	6.3 C	-0.07 C
2005	7.6 C	+1.28 C
2006	8.0 C	+1.71 C
2007	7.4 C	+1.04 C
2008	6.2 C	-0.11 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

1973 to 2009

Yearly extremes at St Ignace Mackinac Br: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.7 C (98.1 F)	1987	29.4 C (84.9 F)	37
Coldest night (TNn)	-33.9 C (-29.0 F)	1987	-25.6 C (-14.1 F)	37
Wettest day (Rx1day)	106.7 mm (4.2 in)	2008	41.9 mm (1.6 in)	37
Wettest five days (Rx5day)	155.0 mm (6.1 in)	1996	67.1 mm (2.6 in)	37
Longest dry spell (CDD)	40 days	1989	20 days	37

Hottest day (TXx)

The hottest day of the year at St Ignace Mackinac Br, 1973 to 2009. The record is 36.7 C (98.1 F) in 1987, marked on the chart; the median year is 29.4 C (84.9 F).

Hottest day (TXx) at St Ignace Mackinac Br by year
Year	Hottest day (TXx)
1973	9.4 C (48.9 F)
1974	29.4 C (84.9 F)
1975	31.1 C (88.0 F)
1976	31.1 C (88.0 F)
1977	30.0 C (86.0 F)
1978	30.6 C (87.1 F)
1979	28.3 C (82.9 F)
1980	28.9 C (84.0 F)
1981	29.4 C (84.9 F)
1982	29.4 C (84.9 F)
1983	31.1 C (88.0 F)
1984	30.0 C (86.0 F)
1985	33.9 C (93.0 F)
1986	29.4 C (84.9 F)
1987	36.7 C (98.1 F)
1988	31.7 C (89.1 F)
1989	29.4 C (84.9 F)
1990	28.3 C (82.9 F)
1991	30.0 C (86.0 F)
1992	28.3 C (82.9 F)
1993	29.4 C (84.9 F)
1994	28.9 C (84.0 F)
1995	28.9 C (84.0 F)
1996	28.3 C (82.9 F)
1997	29.4 C (84.9 F)
1998	28.9 C (84.0 F)
1999	32.2 C (90.0 F)
2000	31.7 C (89.1 F)
2001	30.6 C (87.1 F)
2002	30.6 C (87.1 F)
2003	28.9 C (84.0 F)
2004	28.3 C (82.9 F)
2005	32.2 C (90.0 F)
2006	31.7 C (89.1 F)
2007	30.6 C (87.1 F)
2008	28.9 C (84.0 F)
2009	30.0 C (86.0 F)

Coldest night (TNn)

The coldest night of the year at St Ignace Mackinac Br, 1973 to 2009. The record is -33.9 C (-29.0 F) in 1987, marked on the chart; the median year is -25.6 C (-14.1 F).

Coldest night (TNn) at St Ignace Mackinac Br by year
Year	Coldest night (TNn)
1973	-16.7 C (1.9 F)
1974	-26.1 C (-15.0 F)
1975	-20.6 C (-5.1 F)
1976	-31.1 C (-24.0 F)
1977	-28.3 C (-18.9 F)
1978	-23.9 C (-11.0 F)
1979	-32.2 C (-26.0 F)
1980	-26.1 C (-15.0 F)
1981	-32.8 C (-27.0 F)
1982	-29.4 C (-20.9 F)
1983	-21.1 C (-6.0 F)
1984	-22.2 C (-8.0 F)
1985	-27.8 C (-18.0 F)
1986	-29.4 C (-20.9 F)
1987	-33.9 C (-29.0 F)
1988	-21.7 C (-7.1 F)
1989	-25.6 C (-14.1 F)
1990	-26.1 C (-15.0 F)
1991	-20.6 C (-5.1 F)
1992	-23.9 C (-11.0 F)
1993	-26.1 C (-15.0 F)
1994	-30.6 C (-23.1 F)
1995	-27.8 C (-18.0 F)
1996	-26.7 C (-16.1 F)
1997	-27.2 C (-17.0 F)
1998	-16.7 C (1.9 F)
1999	-17.2 C (1.0 F)
2000	-21.1 C (-6.0 F)
2001	-22.2 C (-8.0 F)
2002	-16.7 C (1.9 F)
2003	-27.2 C (-17.0 F)
2004	-26.1 C (-15.0 F)
2005	-23.9 C (-11.0 F)
2006	-18.3 C (-0.9 F)
2007	-21.7 C (-7.1 F)
2008	-20.6 C (-5.1 F)
2009	-23.3 C (-9.9 F)

Wettest day (Rx1day)

The wettest day of the year at St Ignace Mackinac Br, 1973 to 2009. The record is 106.7 mm (4.2 in) in 2008, marked on the chart; the median year is 41.9 mm (1.6 in).

Wettest day (Rx1day) at St Ignace Mackinac Br by year
Year	Wettest day (Rx1day)
1973	25.4 mm (1.0 in)
1974	38.6 mm (1.5 in)
1975	69.9 mm (2.8 in)
1976	30.5 mm (1.2 in)
1977	76.2 mm (3.0 in)
1978	50.8 mm (2.0 in)
1979	27.2 mm (1.1 in)
1980	44.5 mm (1.8 in)
1981	29.2 mm (1.1 in)
1982	41.9 mm (1.6 in)
1983	27.9 mm (1.1 in)
1984	102.4 mm (4.0 in)
1985	36.1 mm (1.4 in)
1986	36.1 mm (1.4 in)
1987	59.7 mm (2.4 in)
1988	61.7 mm (2.4 in)
1989	40.6 mm (1.6 in)
1990	37.1 mm (1.5 in)
1991	38.6 mm (1.5 in)
1992	49.3 mm (1.9 in)
1993	39.6 mm (1.6 in)
1994	49.3 mm (1.9 in)
1995	76.2 mm (3.0 in)
1996	77.5 mm (3.1 in)
1997	38.6 mm (1.5 in)
1998	49.5 mm (1.9 in)
1999	39.4 mm (1.6 in)
2000	32.3 mm (1.3 in)
2001	71.6 mm (2.8 in)
2002	44.7 mm (1.8 in)
2003	68.3 mm (2.7 in)
2004	31.8 mm (1.3 in)
2005	53.3 mm (2.1 in)
2006	50.8 mm (2.0 in)
2007	30.5 mm (1.2 in)
2008	106.7 mm (4.2 in)
2009	36.6 mm (1.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at St Ignace Mackinac Br, 1973 to 2009. The record is 155.0 mm (6.1 in) in 1996, marked on the chart; the median year is 67.1 mm (2.6 in).

Wettest five days (Rx5day) at St Ignace Mackinac Br by year
Year	Wettest five days (Rx5day)
1973	35.3 mm (1.4 in)
1974	58.0 mm (2.3 in)
1975	69.9 mm (2.8 in)
1976	39.4 mm (1.6 in)
1977	141.5 mm (5.6 in)
1978	67.8 mm (2.7 in)
1979	55.1 mm (2.2 in)
1980	70.7 mm (2.8 in)
1981	56.9 mm (2.2 in)
1982	50.8 mm (2.0 in)
1983	41.6 mm (1.6 in)
1984	103.7 mm (4.1 in)
1985	55.6 mm (2.2 in)
1986	83.0 mm (3.3 in)
1987	73.2 mm (2.9 in)
1988	114.4 mm (4.5 in)
1989	45.7 mm (1.8 in)
1990	50.8 mm (2.0 in)
1991	67.1 mm (2.6 in)
1992	75.7 mm (3.0 in)
1993	57.4 mm (2.3 in)
1994	92.2 mm (3.6 in)
1995	153.7 mm (6.1 in)
1996	155.0 mm (6.1 in)
1997	43.4 mm (1.7 in)
1998	62.5 mm (2.5 in)
1999	55.6 mm (2.2 in)
2000	45.2 mm (1.8 in)
2001	90.7 mm (3.6 in)
2002	113.4 mm (4.5 in)
2003	66.4 mm (2.6 in)
2004	58.7 mm (2.3 in)
2005	70.5 mm (2.8 in)
2006	80.3 mm (3.2 in)
2007	69.4 mm (2.7 in)
2008	108.2 mm (4.3 in)
2009	56.7 mm (2.2 in)

Longest dry spell (CDD)

The longest dry spell of the year at St Ignace Mackinac Br, 1973 to 2009. The record is 40 days in 1989, marked on the chart; the median year is 20 days.

Longest dry spell (CDD) at St Ignace Mackinac Br by year
Year	Longest dry spell (CDD)
1973	12 days
1974	14 days
1975	21 days
1976	14 days
1977	19 days
1978	23 days
1979	22 days
1980	14 days
1981	25 days
1982	24 days
1983	26 days
1984	15 days
1985	14 days
1986	14 days
1987	23 days
1988	23 days
1989	40 days
1990	14 days
1991	20 days
1992	30 days
1993	18 days
1994	27 days
1995	35 days
1996	20 days
1997	19 days
1998	39 days
1999	39 days
2000	19 days
2001	39 days
2002	29 days
2003	21 days
2004	15 days
2005	14 days
2006	16 days
2007	16 days
2008	15 days
2009	21 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

24 years with a frost

Across 24 years with a frost, the median last spring frost at St Ignace Mackinac Br falls on 7 May and the median first autumn frost on 13 October, which leaves a median of 157 days between them.

Frost dates and growing season at St Ignace Mackinac Br
Measure	Median, all years	Earliest period	Recent period (1974 to 2008)	Recent against earliest	Fitted trend
Last spring frost	7 May	n/a	7 May	n/a	n/a
First autumn frost	13 October	n/a	13 October	n/a	n/a
Growing days	157 days	n/a	157 days	n/a	n/a

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.

Download the Data

Data for St Ignace Mackinac Br standing records by year: CSV or JSON. Field meanings are on the data page.
Data for St Ignace Mackinac Br 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).