Monroe Threshold Days by Year (USC00135638)

19 fixed thresholds counted per year at Monroe (USC00135638): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Monroe Thresholds

Monroe: days with a maximum temperature at or above 30 C (86 F) in 35 years, most in 1934 with 85.
Monroe: days with a maximum temperature at or above 90 F (32.2 C) in 35 years, most in 1934 with 70.
Monroe: days with a maximum temperature at or below 0 C (32 F) in 35 years, most in 1937 with 71.
Monroe: nights with a minimum temperature at or below 0 C (32 F) in 34 years, most in 1926 with 155.
19 fixed thresholds have at least one qualifying day at Monroe.

Days at or above 30 C (86 F)

35 years with a qualifying day

Days per year at Monroe with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 85 in 1934.

Days at or above 30 C (86 F) per year at Monroe
Year	Days	Decade average
1912	47	47.4
1913	72	47.4
1914	48	47.4
1915	18	47.4
1916	59	47.4
1917	34	47.4
1918	45	47.4
1919	56	47.4
1920	53	49
1921	78	49
1922	56	49
1923	47	49
1924	24	49
1925	69	49
1926	56	49
1927	42	49
1928	25	49
1929	40	49
1930	61	63.6
1931	71	63.6
1932	41	63.6
1933	74	63.6
1934	85	63.6
1935	45	63.6
1936	73	63.6
1937	56	63.6
1938	69	63.6
1939	61	63.6
1940	47	54.1
1941	50	54.1
1942	41	54.1
1943	38	54.1
1944	71	54.1
1945	53	54.1
1947	79	54.1

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

First to last qualifying date each year at Monroe
Year	First date	Last date
1912	1912-05-22	1912-10-05
1913	1913-04-30	1913-09-10
1914	1914-05-10	1914-09-06
1915	1915-04-16	1915-09-13
1916	1916-04-12	1916-10-07
1917	1917-05-17	1917-09-15
1918	1918-05-03	1918-08-22
1919	1919-05-30	1919-10-01
1920	1920-05-22	1920-10-11
1921	1921-05-18	1921-09-22
1922	1922-05-10	1922-10-05
1923	1923-06-01	1923-09-26
1924	1924-05-05	1924-09-20
1925	1925-04-22	1925-09-28
1926	1926-04-30	1926-09-21
1927	1927-05-23	1927-11-01
1928	1928-05-09	1928-09-09
1929	1929-04-04	1929-09-27
1930	1930-04-10	1930-10-09
1931	1931-04-08	1931-09-20
1932	1932-05-13	1932-08-30
1933	1933-06-02	1933-09-25
1934	1934-05-06	1934-09-11
1935	1935-07-01	1935-09-24
1936	1936-04-30	1936-09-22
1937	1937-05-29	1937-10-29
1938	1938-03-21	1938-10-17
1939	1939-04-24	1939-10-07
1940	1940-05-12	1940-09-22
1941	1941-05-14	1941-09-04
1942	1942-05-28	1942-09-14
1943	1943-05-28	1943-09-27
1944	1944-05-14	1944-09-18
1945	1945-05-20	1945-09-23
1947	1947-06-05	1947-10-21

Every Fixed Threshold

Fixed thresholds at Monroe
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	35	85	1934	79
35 C (95 F): Days	33	44	1934	42
40 C (104 F): Days	8	13	1934	13
90 F (32.2 C): Days	35	70	1934	56
100 F (37.8 C): Days	23	30	1936	28
110 F (43.3 C): Days	2	1	1934	1
0 C (32 F): Ice days (max	35	71	1937	40
0 C (32 F): Frost days (min	34	155	1926	139
-10 C (14 F): Days with min	34	69	1937	43
-20 C (-4 F): Days with min	33	31	1936	8
-30 C (-22 F): Days with min	12	4	1918	1
20 C (68 F): Tropical nights (min	34	56	1921	37
25 C (77 F): Days with min	18	14	1934	1
10 mm (0.39 in): Days with 10 mm or more rain	33	38	1944	35
25 mm (0.98 in): Days with 25 mm or more rain	33	14	1915	9
50 mm (1.97 in): Days with 50 mm or more rain	24	5	1944	5
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1914	1
10 cm (3.9 in): Days with 10 cm or more snowfall	20	5	1936	3
25 cm (9.8 in): Days with 25 cm or more snowfall	4	1	1921	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1912.

Download the Data

Data for Monroe 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

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

Monroe Threshold Days by Year (USC00135638)

Key Facts for Monroe Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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