Downing Threshold Days by Year (USC00232318)

20 fixed thresholds counted per year at Downing (USC00232318): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Downing Thresholds

Downing: days with 10 mm (0.39 in) or more of precipitation in 52 years, most in 2010 with 48.
Downing: days with 25 mm (0.98 in) or more of precipitation in 52 years, most in 2010 with 19.
Downing: days with 50 mm (1.97 in) or more of precipitation in 45 years, most in 1928 with 6.
Downing: days with 10 cm (3.9 in) or more of snowfall in 28 years, most in 1997 with 5.
20 fixed thresholds have at least one qualifying day at Downing.

Days at or above 30 C (86 F)

25 years with a qualifying day

Days per year at Downing with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 102 in 1936.

Days at or above 30 C (86 F) per year at Downing
Year	Days	Decade average
1921	83	57.6
1922	69	57.6
1923	57	57.6
1924	34	57.6
1925	71	57.6
1926	60	57.6
1927	55	57.6
1928	41	57.6
1929	48	57.6
1930	73	76.1
1931	74	76.1
1932	53	76.1
1933	78	76.1
1934	96	76.1
1935	61	76.1
1936	102	76.1
1937	72	76.1
2010	49	45.9
2011	57	45.9
2012	67	45.9
2013	47	45.9
2014	24	45.9
2015	32	45.9
2016	44	45.9
2017	47	45.9

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

First to last qualifying date each year at Downing
Year	First date	Last date
1921	1921-05-20	1921-09-22
1922	1922-05-10	1922-09-29
1923	1923-05-31	1923-10-11
1924	1924-06-19	1924-09-27
1925	1925-04-22	1925-09-20
1926	1926-05-17	1926-09-23
1927	1927-05-23	1927-10-28
1928	1928-05-02	1928-10-12
1929	1929-05-28	1929-09-28
1930	1930-04-10	1930-10-10
1931	1931-05-16	1931-10-05
1932	1932-05-14	1932-09-19
1933	1933-05-19	1933-09-30
1934	1934-05-06	1934-09-25
1935	1935-06-10	1935-09-24
1936	1936-04-20	1936-10-13
1937	1937-05-29	1937-10-29
2010	2010-05-25	2010-09-22
2011	2011-05-10	2011-09-13
2012	2012-05-27	2012-09-13
2013	2013-05-15	2013-09-20
2014	2014-05-08	2014-09-05
2015	2015-06-08	2015-09-18
2016	2016-05-31	2016-10-18
2017	2017-05-16	2017-09-26

Every Fixed Threshold

Fixed thresholds at Downing
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	25	102	1936	47
35 C (95 F): Days	23	61	1936	2
40 C (104 F): Days	4	25	1936	2
45 C (113 F): Days	2	2	1934	1
90 F (32.2 C): Days	25	84	1934	20
100 F (37.8 C): Days	11	46	1936	1
110 F (43.3 C): Days	2	7	1934	4
0 C (32 F): Ice days (max	25	63	2014	26
0 C (32 F): Frost days (min	25	152	2013	118
-10 C (14 F): Days with min	25	62	2014	20
-20 C (-4 F): Days with min	22	25	1936	4
-30 C (-22 F): Days with min	1	1	1924	1
20 C (68 F): Tropical nights (min	25	56	1936	15
25 C (77 F): Days with min	9	13	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	52	48	2010	25
25 mm (0.98 in): Days with 25 mm or more rain	52	19	2010	9
50 mm (1.97 in): Days with 50 mm or more rain	45	6	1928	1
100 mm (3.94 in): Days with 100 mm or more rain	8	2	1928	1
10 cm (3.9 in): Days with 10 cm or more snowfall	28	5	1997	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1997	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1921.

Download the Data

Data for Downing 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).

Downing Threshold Days by Year (USC00232318)

Key Facts for Downing Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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