Alpha 1 NE Threshold Days by Year (USC00100199)

16 fixed thresholds counted per year at Alpha 1 NE (USC00100199): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alpha 1 NE Thresholds

Alpha 1 NE: days with a maximum temperature at or above 30 C (86 F) in 24 years, most in 1922 with 48.
Alpha 1 NE: days with a maximum temperature at or below 0 C (32 F) in 24 years, most in 1932 with 66.
Alpha 1 NE: nights with a minimum temperature at or below 0 C (32 F) in 24 years, most in 1924 with 289.
Alpha 1 NE: nights with a minimum temperature at or below -10 C (14 F) in 24 years, most in 1952 with 98.
16 fixed thresholds have at least one qualifying day at Alpha 1 NE.

Days at or above 30 C (86 F)

24 years with a qualifying day

Days per year at Alpha 1 NE with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 48 in 1922.

Days at or above 30 C (86 F) per year at Alpha 1 NE
Year	Days	Decade average
1920	33	38.5
1921	37	38.5
1922	48	38.5
1924	36	38.5
1932	10	22
1933	30	22
1934	25	22
1935	20	22
1937	27	22
1938	14	22
1939	28	22
1940	35	18.4
1941	11	18.4
1942	30	18.4
1943	22	18.4
1944	13	18.4
1945	16	18.4
1946	19	18.4
1947	18	18.4
1948	4	18.4
1949	16	18.4
1950	14	15.7
1951	23	15.7
1952	10	15.7

For each year, a bar from the first to the last day at Alpha 1 NE meeting 30 C (86 F).

First to last qualifying date each year at Alpha 1 NE
Year	First date	Last date
1920	1920-07-02	1920-09-04
1921	1921-06-13	1921-10-03
1922	1922-06-19	1922-09-22
1924	1924-05-11	1924-09-15
1932	1932-06-22	1932-08-18
1933	1933-06-12	1933-09-03
1934	1934-07-06	1934-09-06
1935	1935-07-12	1935-09-02
1937	1937-06-28	1937-09-18
1938	1938-07-17	1938-09-18
1939	1939-06-28	1939-09-20
1940	1940-06-11	1940-08-31
1941	1941-07-05	1941-08-10
1942	1942-07-03	1942-09-04
1943	1943-07-06	1943-09-15
1944	1944-06-30	1944-09-07
1945	1945-06-21	1945-09-01
1946	1946-07-01	1946-08-22
1947	1947-07-03	1947-09-02
1948	1948-06-29	1948-09-13
1949	1949-06-10	1949-09-23
1950	1950-06-30	1950-09-04
1951	1951-07-03	1951-09-16
1952	1952-07-09	1952-08-21

Every Fixed Threshold

Fixed thresholds at Alpha 1 NE
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	24	48	1922	10
35 C (95 F): Days	12	6	1924	1
90 F (32.2 C): Days	23	23	1921	1
100 F (37.8 C): Days	1	1	1924	1
0 C (32 F): Ice days (max	24	66	1932	65
0 C (32 F): Frost days (min	24	289	1924	275
-10 C (14 F): Days with min	24	98	1952	98
-20 C (-4 F): Days with min	24	36	1952	36
-30 C (-22 F): Days with min	19	14	1949	4
-40 C (-40 F): Days with min	4	2	1937	1
20 C (68 F): Tropical nights (min	1	1	1937	1
10 mm (0.39 in): Days with 10 mm or more rain	21	36	1940	12
25 mm (0.98 in): Days with 25 mm or more rain	18	8	1941	5
50 mm (1.97 in): Days with 50 mm or more rain	5	1	1920	1
10 cm (3.9 in): Days with 10 cm or more snowfall	15	22	1951	15
25 cm (9.8 in): Days with 25 cm or more snowfall	9	6	1949	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1920.

Download the Data

Data for Alpha 1 NE 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).

Alpha 1 NE Threshold Days by Year (USC00100199)

Key Facts for Alpha 1 NE Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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