Calumet Threshold Days by Year

16 fixed thresholds counted per year at Calumet (USC00201215): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Calumet Thresholds

Calumet: days with a maximum temperature at or below 0 C (32 F) in 47 years, most in 1926 with 135.
Calumet: nights with a minimum temperature at or below 0 C (32 F) in 47 years, most in 1907 with 216.
Calumet: nights with a minimum temperature at or below -10 C (14 F) in 47 years, most in 1929 with 98.
Calumet: nights with a minimum temperature at or below -20 C (-4 F) in 47 years, most in 1912 with 35.
16 fixed thresholds have at least one qualifying day at Calumet.

Days at or above 30 C (86 F)

42 years with a qualifying day

Days per year at Calumet with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 16 in 1931.

Days at or above 30 C (86 F) per year at Calumet
Year	Days	Decade average
1892	2	4.9
1893	10	4.9
1894	8	4.9
1895	1	4.9
1896	5	4.9
1897	8	4.9
1898	4	4.9
1899	1	4.9
1900	3	2.9
1901	8	2.9
1903	1	2.9
1906	1	2.9
1907	1	2.9
1908	4	2.9
1909	2	2.9
1910	8	4.9
1911	6	4.9
1912	1	4.9
1913	3	4.9
1914	4	4.9
1916	10	4.9
1917	4	4.9
1918	1	4.9
1919	7	4.9
1920	1	6.2
1921	14	6.2
1922	6	6.2
1923	6	6.2
1924	1	6.2
1925	8	6.2
1927	5	6.2
1928	5	6.2
1929	10	6.2
1930	6	7.8
1931	16	7.8
1932	2	7.8
1933	9	7.8
1934	9	7.8
1935	6	7.8
1936	13	7.8
1937	7	7.8
1938	2	7.8

For each year, a bar from the first to the last day at Calumet meeting 30 C (86 F).

First to last qualifying date each year at Calumet
Year	First date	Last date
1892	1892-07-23	1892-08-16
1893	1893-06-12	1893-08-08
1894	1894-06-14	1894-09-02
1895	1895-05-29	1895-05-29
1896	1896-05-07	1896-08-07
1897	1897-07-03	1897-09-09
1898	1898-06-23	1898-07-18
1899	1899-07-23	1899-07-23
1900	1900-05-13	1900-08-04
1901	1901-06-26	1901-07-23
1903	1903-07-07	1903-07-07
1906	1906-07-12	1906-07-12
1907	1907-06-16	1907-06-16
1908	1908-07-09	1908-08-31
1909	1909-06-21	1909-08-27
1910	1910-06-17	1910-07-07
1911	1911-05-19	1911-07-09
1912	1912-07-08	1912-07-08
1913	1913-06-29	1913-09-01
1914	1914-06-07	1914-08-09
1916	1916-07-18	1916-08-19
1917	1917-07-22	1917-07-29
1918	1918-07-21	1918-07-21
1919	1919-05-29	1919-09-07
1920	1920-09-14	1920-09-14
1921	1921-06-16	1921-09-01
1922	1922-06-07	1922-08-17
1923	1923-06-01	1923-07-19
1924	1924-08-29	1924-08-29
1925	1925-05-31	1925-08-24
1927	1927-06-28	1927-09-15
1928	1928-07-15	1928-08-14
1929	1929-06-17	1929-09-03
1930	1930-07-27	1930-08-26
1931	1931-06-18	1931-09-12
1932	1932-08-30	1932-08-31
1933	1933-06-10	1933-08-06
1934	1934-05-31	1934-08-18
1935	1935-06-29	1935-08-16
1936	1936-07-07	1936-09-06
1937	1937-06-24	1937-08-28
1938	1938-08-03	1938-08-14

Every Fixed Threshold

Fixed thresholds at Calumet
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	42	16	1931	2
35 C (95 F): Days	9	6	1936	6
90 F (32.2 C): Days	30	8	1936	1
100 F (37.8 C): Days	1	1	1917	1
0 C (32 F): Ice days (max	47	135	1926	100
0 C (32 F): Frost days (min	47	216	1907	162
-10 C (14 F): Days with min	47	98	1929	69
-20 C (-4 F): Days with min	47	35	1912	8
-30 C (-22 F): Days with min	8	2	1918	1
20 C (68 F): Tropical nights (min	34	8	1921	4
25 C (77 F): Days with min	4	2	1936	2
10 mm (0.39 in): Days with 10 mm or more rain	38	32	1927	32
25 mm (0.98 in): Days with 25 mm or more rain	38	9	1927	4
50 mm (1.97 in): Days with 50 mm or more rain	12	2	1896	1
10 cm (3.9 in): Days with 10 cm or more snowfall	29	15	1910	10
25 cm (9.8 in): Days with 25 cm or more snowfall	12	2	1927	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1892.

Download the Data

Data for Calumet 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). Threshold counts are computed by this site.

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

Calumet Threshold Days by Year

Key Facts for Calumet Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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