Luther Threshold Days by Year (USC00204969)

17 fixed thresholds counted per year at Luther (USC00204969): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Luther Thresholds

Luther: days with a maximum temperature at or above 30 C (86 F) in 25 years, most in 1921 with 49.
Luther: days with a maximum temperature at or below 0 C (32 F) in 25 years, most in 1912 with 81.
Luther: nights with a minimum temperature at or below 0 C (32 F) in 25 years, most in 1926 with 200.
Luther: nights with a minimum temperature at or below -10 C (14 F) in 25 years, most in 1912 with 79.
17 fixed thresholds have at least one qualifying day at Luther.

Days at or above 30 C (86 F)

25 years with a qualifying day

Days per year at Luther with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 49 in 1921.

Days at or above 30 C (86 F) per year at Luther
Year	Days	Decade average
1910	33	24.7
1911	36	24.7
1912	12	24.7
1913	34	24.7
1914	25	24.7
1915	8	24.7
1917	12	24.7
1918	26	24.7
1919	36	24.7
1920	15	21.6
1921	49	21.6
1922	19	21.6
1923	28	21.6
1924	6	21.6
1925	24	21.6
1926	25	21.6
1927	22	21.6
1928	6	21.6
1930	28	35.7
1931	28	35.7
1932	25	35.7
1933	46	35.7
1934	45	35.7
1935	31	35.7
1936	47	35.7

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

First to last qualifying date each year at Luther
Year	First date	Last date
1910	1910-06-15	1910-08-21
1911	1911-05-19	1911-09-01
1912	1912-06-25	1912-09-09
1913	1913-06-14	1913-09-07
1914	1914-05-26	1914-09-20
1915	1915-06-06	1915-09-05
1917	1917-07-21	1917-08-01
1918	1918-05-31	1918-08-25
1919	1919-05-26	1919-09-08
1920	1920-06-10	1920-09-25
1921	1921-05-20	1921-09-01
1922	1922-05-10	1922-09-08
1923	1923-06-01	1923-08-11
1924	1924-06-20	1924-08-30
1925	1925-05-31	1925-09-04
1926	1926-05-07	1926-09-07
1927	1927-06-28	1927-09-16
1928	1928-07-07	1928-08-16
1930	1930-06-23	1930-09-12
1931	1931-06-19	1931-09-13
1932	1932-05-15	1932-08-31
1933	1933-06-04	1933-09-08
1934	1934-05-19	1934-08-18
1935	1935-06-13	1935-09-18
1936	1936-05-08	1936-09-23

Every Fixed Threshold

Fixed thresholds at Luther
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	25	49	1921	47
35 C (95 F): Days	14	14	1921	12
40 C (104 F): Days	2	6	1936	6
90 F (32.2 C): Days	24	28	1934	28
100 F (37.8 C): Days	6	8	1936	8
110 F (43.3 C): Days	1	1	1936	1
0 C (32 F): Ice days (max	25	81	1912	74
0 C (32 F): Frost days (min	25	200	1926	183
-10 C (14 F): Days with min	25	79	1912	65
-20 C (-4 F): Days with min	24	33	1912	26
-30 C (-22 F): Days with min	12	6	1912	6
20 C (68 F): Tropical nights (min	21	16	1931	1
25 C (77 F): Days with min	2	1	1917	1
10 mm (0.39 in): Days with 10 mm or more rain	25	34	1931	29
25 mm (0.98 in): Days with 25 mm or more rain	25	10	1936	10
50 mm (1.97 in): Days with 50 mm or more rain	15	4	1922	1
10 cm (3.9 in): Days with 10 cm or more snowfall	3	7	1935	3

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1910.

Download the Data

Data for Luther 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).

Luther Threshold Days by Year (USC00204969)

Key Facts for Luther Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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