Record envelope, standing records and threshold days for Iron River (USC00204093), Michigan, United States, with 34 years of record.
Key Facts for Iron River
Iron River (USC00204093) is a weather station in Michigan, United States at 46.07 latitude and -88.63 longitude, 458 m (1,504 ft) above sea level.
The station reports from 1896 to 1929, 34 years of record.
1,464 records set at Iron River still stand.
Records are tracked for prcp: an element needs 30 years of data to be eligible.
Iron River set a daily record precipitation of 25.4 mm (1.0 in) on 9 September 1929.
About the Station
Location: Michigan, United States, 46.07 latitude, -88.63 longitude.
Elevation: 458 m (1,504 ft).
Period of record: 1896 to 1929, 34 years.
Eligible elements: prcp.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Iron River. 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 Iron River, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
11.7 C (53.1 F)
-41.7 C (-43.1 F)
n/a
n/a
Feb
14.4 C (57.9 F)
-43.9 C (-47.0 F)
n/a
n/a
Mar
28.3 C (82.9 F)
-33.9 C (-29.0 F)
n/a
n/a
Apr
29.4 C (84.9 F)
-22.8 C (-9.0 F)
n/a
n/a
May
34.4 C (93.9 F)
-12.2 C (10.0 F)
n/a
n/a
Jun
36.7 C (98.1 F)
-5.0 C (23.0 F)
n/a
n/a
Jul
37.8 C (100.0 F)
-2.2 C (28.0 F)
n/a
n/a
Aug
36.7 C (98.1 F)
-3.3 C (26.1 F)
n/a
n/a
Sep
33.3 C (91.9 F)
-9.4 C (15.1 F)
n/a
n/a
Oct
28.9 C (84.0 F)
-15.6 C (3.9 F)
n/a
n/a
Nov
21.1 C (70.0 F)
-26.1 C (-15.0 F)
n/a
n/a
Dec
13.3 C (55.9 F)
-36.7 C (-34.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Iron River still stand. 1897 holds the most, with 79.
Standing records at Iron River by the year they were set
Year set
Standing records
1896
68
1897
79
1898
67
1899
69
1900
76
1901
27
1902
30
1903
54
1904
46
1905
51
1906
31
1907
56
1908
48
1909
65
1910
59
1911
55
1912
54
1913
53
1914
56
1915
46
1916
49
1917
50
1918
66
1919
60
1920
53
1921
66
1922
30
Wettest Day of Each Month
Apr: 111.8 mm (4.4 in)
The wettest day on record for each calendar month at Iron River. The most was 111.8 mm (4.4 in) on 29 April 1903.
Record daily precipitation for each month at Iron River
Month
Record daily precipitation (mm)
Date
Jan
31.8 mm (1.3 in)
3 January 1897
Feb
61.0 mm (2.4 in)
21 February 1917
Mar
38.1 mm (1.5 in)
6 March 1908
Apr
111.8 mm (4.4 in)
29 April 1903
May
47.2 mm (1.9 in)
17 May 1910
Jun
71.1 mm (2.8 in)
16 June 1922
Jul
95.3 mm (3.8 in)
4 July 1901
Aug
80.8 mm (3.2 in)
4 August 1896
Sep
109.7 mm (4.3 in)
7 September 1916
Oct
58.4 mm (2.3 in)
25 October 1899
Nov
43.7 mm (1.7 in)
25 November 1896
Dec
33.0 mm (1.3 in)
8 December 1927
Period of Record Coverage
1896 to 1922
Complete yearUnder 90 percent of days
27 years of record at Iron River, 1896 to 1922. 7 years have data for under 90 percent of days and are left out of rankings: 1896, 1897, 1898, 1899, 1901, 1902, 1922.
Cooler than the station meanWarmer than the station mean
One stripe for each of 17 complete years at Iron River, 1897 to 1921. Blue stripes are years cooler than the station's own mean of 4.1 C (39.4 F); red stripes are warmer. The coolest year was 1917, at 2.3 C (36.1 F), and the warmest was 1921, at 6.6 C (43.9 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Iron River as warming stripes, 1897 to 1921
Year
Annual mean temperature
Difference from the station mean
1897
3.1 C
-1.00 C
1903
3.1 C
-1.02 C
1904
2.5 C
-1.61 C
1905
3.5 C
-0.60 C
1907
3.0 C
-1.10 C
1908
4.8 C
+0.69 C
1909
4.4 C
+0.34 C
1910
4.6 C
+0.46 C
1911
4.9 C
+0.80 C
1914
4.4 C
+0.33 C
1915
4.7 C
+0.56 C
1916
3.8 C
-0.26 C
1917
2.3 C
-1.84 C
1918
4.4 C
+0.35 C
1919
4.8 C
+0.74 C
1920
4.7 C
+0.62 C
1921
6.6 C
+2.51 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
1896 to 1929
Yearly extremes at Iron River: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.8 C (100.0 F)
1911
33.9 C (93.0 F)
27
Coldest night (TNn)
-43.9 C (-47.0 F)
1899
-35.6 C (-32.1 F)
27
Wettest day (Rx1day)
111.8 mm (4.4 in)
1903
47.8 mm (1.9 in)
34
Wettest five days (Rx5day)
233.7 mm (9.2 in)
1903
83.6 mm (3.3 in)
34
Longest dry spell (CDD)
35 days
1899
20 days
34
Hottest day (TXx)
The hottest day of the year at Iron River, 1896 to 1929. The record is 37.8 C (100.0 F) in 1911, marked on the chart; the median year is 33.9 C (93.0 F).
Hottest day (TXx) at Iron River by year
Year
Hottest day (TXx)
1896
33.3 C (91.9 F)
1897
34.4 C (93.9 F)
1898
33.9 C (93.0 F)
1899
31.7 C (89.1 F)
1900
36.7 C (98.1 F)
1901
35.6 C (96.1 F)
1902
32.2 C (90.0 F)
1903
31.1 C (88.0 F)
1904
33.9 C (93.0 F)
1905
32.8 C (91.0 F)
1906
33.3 C (91.9 F)
1907
32.2 C (90.0 F)
1908
35.0 C (95.0 F)
1909
33.3 C (91.9 F)
1910
36.7 C (98.1 F)
1911
37.8 C (100.0 F)
1912
33.9 C (93.0 F)
1913
34.4 C (93.9 F)
1914
32.8 C (91.0 F)
1915
31.7 C (89.1 F)
1916
36.1 C (97.0 F)
1917
37.2 C (99.0 F)
1918
35.0 C (95.0 F)
1919
34.4 C (93.9 F)
1920
32.2 C (90.0 F)
1921
37.8 C (100.0 F)
1922
32.8 C (91.0 F)
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
Coldest night (TNn)
The coldest night of the year at Iron River, 1896 to 1929. The record is -43.9 C (-47.0 F) in 1899, marked on the chart; the median year is -35.6 C (-32.1 F).
Coldest night (TNn) at Iron River by year
Year
Coldest night (TNn)
1896
-32.2 C (-26.0 F)
1897
-37.2 C (-35.0 F)
1898
-28.3 C (-18.9 F)
1899
-43.9 C (-47.0 F)
1900
-35.6 C (-32.1 F)
1901
-28.3 C (-18.9 F)
1902
-25.6 C (-14.1 F)
1903
-32.2 C (-26.0 F)
1904
-38.3 C (-36.9 F)
1905
-33.3 C (-27.9 F)
1906
-32.8 C (-27.0 F)
1907
-41.1 C (-42.0 F)
1908
-35.6 C (-32.1 F)
1909
-38.3 C (-36.9 F)
1910
-36.1 C (-33.0 F)
1911
-35.6 C (-32.1 F)
1912
-41.1 C (-42.0 F)
1913
-33.3 C (-27.9 F)
1914
-37.8 C (-36.0 F)
1915
-41.7 C (-43.1 F)
1916
-33.9 C (-29.0 F)
1917
-33.9 C (-29.0 F)
1918
-34.4 C (-29.9 F)
1919
-36.7 C (-34.1 F)
1920
-32.8 C (-27.0 F)
1921
-31.7 C (-25.1 F)
1922
-37.8 C (-36.0 F)
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
Wettest day (Rx1day)
The wettest day of the year at Iron River, 1896 to 1929. The record is 111.8 mm (4.4 in) in 1903, marked on the chart; the median year is 47.8 mm (1.9 in).
Wettest day (Rx1day) at Iron River by year
Year
Wettest day (Rx1day)
1896
80.8 mm (3.2 in)
1897
45.5 mm (1.8 in)
1898
38.9 mm (1.5 in)
1899
58.4 mm (2.3 in)
1900
55.9 mm (2.2 in)
1901
95.3 mm (3.8 in)
1902
39.4 mm (1.6 in)
1903
111.8 mm (4.4 in)
1904
40.6 mm (1.6 in)
1905
40.6 mm (1.6 in)
1906
31.8 mm (1.3 in)
1907
71.1 mm (2.8 in)
1908
50.8 mm (2.0 in)
1909
69.9 mm (2.8 in)
1910
47.2 mm (1.9 in)
1911
57.2 mm (2.3 in)
1912
35.6 mm (1.4 in)
1913
40.6 mm (1.6 in)
1914
43.2 mm (1.7 in)
1915
60.2 mm (2.4 in)
1916
109.7 mm (4.3 in)
1917
61.0 mm (2.4 in)
1918
44.5 mm (1.8 in)
1919
26.2 mm (1.0 in)
1920
35.6 mm (1.4 in)
1921
48.3 mm (1.9 in)
1922
71.1 mm (2.8 in)
1923
39.4 mm (1.6 in)
1924
50.8 mm (2.0 in)
1925
25.7 mm (1.0 in)
1926
50.3 mm (2.0 in)
1927
80.5 mm (3.2 in)
1928
35.6 mm (1.4 in)
1929
26.7 mm (1.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Iron River, 1896 to 1929. The record is 233.7 mm (9.2 in) in 1903, marked on the chart; the median year is 83.6 mm (3.3 in).
Wettest five days (Rx5day) at Iron River by year
Year
Wettest five days (Rx5day)
1896
113.3 mm (4.5 in)
1897
63.8 mm (2.5 in)
1898
44.5 mm (1.8 in)
1899
43.9 mm (1.7 in)
1900
82.0 mm (3.2 in)
1901
109.3 mm (4.3 in)
1902
90.2 mm (3.6 in)
1903
233.7 mm (9.2 in)
1904
81.3 mm (3.2 in)
1905
95.4 mm (3.8 in)
1906
76.1 mm (3.0 in)
1907
106.6 mm (4.2 in)
1908
91.5 mm (3.6 in)
1909
155.6 mm (6.1 in)
1910
66.8 mm (2.6 in)
1911
132.0 mm (5.2 in)
1912
100.3 mm (3.9 in)
1913
86.3 mm (3.4 in)
1914
85.1 mm (3.4 in)
1915
93.5 mm (3.7 in)
1916
151.6 mm (6.0 in)
1917
166.4 mm (6.6 in)
1918
79.1 mm (3.1 in)
1919
60.0 mm (2.4 in)
1920
65.1 mm (2.6 in)
1921
82.0 mm (3.2 in)
1922
102.4 mm (4.0 in)
1923
44.7 mm (1.8 in)
1924
52.8 mm (2.1 in)
1925
33.0 mm (1.3 in)
1926
79.2 mm (3.1 in)
1927
93.9 mm (3.7 in)
1928
63.5 mm (2.5 in)
1929
47.8 mm (1.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Iron River, 1896 to 1929. The record is 35 days in 1899, marked on the chart; the median year is 20 days.
Longest dry spell (CDD) at Iron River by year
Year
Longest dry spell (CDD)
1896
18 days
1897
14 days
1898
14 days
1899
35 days
1900
23 days
1901
23 days
1902
21 days
1903
18 days
1904
29 days
1905
23 days
1906
22 days
1907
21 days
1908
27 days
1909
17 days
1910
26 days
1911
20 days
1912
35 days
1913
12 days
1914
25 days
1915
19 days
1916
15 days
1917
24 days
1918
18 days
1919
18 days
1920
24 days
1921
20 days
1922
13 days
1923
28 days
1924
25 days
1925
16 days
1926
11 days
1927
19 days
1928
19 days
1929
20 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 Iron River standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Iron River 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.