Lewiston Wtp Threshold Days by Year (USC00105236)

17 fixed thresholds counted per year at Lewiston Wtp (USC00105236): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lewiston Wtp Thresholds

Lewiston Wtp: days with a maximum temperature at or above 30 C (86 F) in 23 years, most in 1938 with 100.
Lewiston Wtp: days with a maximum temperature at or above 35 C (95 F) in 23 years, most in 1938 with 54.
Lewiston Wtp: days with a maximum temperature at or above 90 F (32.2 C) in 23 years, most in 1938 with 81.
Lewiston Wtp: days with a maximum temperature at or above 100 F (37.8 C) in 23 years, most in 1938 with 27.
17 fixed thresholds have at least one qualifying day at Lewiston Wtp.

Days at or above 30 C (86 F)

23 years with a qualifying day

Days per year at Lewiston Wtp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 100 in 1938.

Days at or above 30 C (86 F) per year at Lewiston Wtp
Year	Days	Decade average
1894	66	57
1895	69	57
1899	36	57
1934	93	88.8
1935	80	88.8
1936	93	88.8
1937	80	88.8
1938	100	88.8
1939	87	88.8
1940	95	78.6
1941	61	78.6
1942	69	78.6
1943	85	78.6
1944	80	78.6
1945	80	78.6
1946	76	78.6
1949	83	78.6
1950	80	72
1951	74	72
1952	78	72
1953	69	72
1954	61	72
1955	70	72

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

First to last qualifying date each year at Lewiston Wtp
Year	First date	Last date
1894	1894-05-24	1894-09-11
1895	1895-04-22	1895-09-27
1899	1899-06-16	1899-09-12
1934	1934-04-21	1934-10-11
1935	1935-05-21	1935-10-03
1936	1936-04-13	1936-09-29
1937	1937-05-02	1937-09-20
1938	1938-05-23	1938-10-03
1939	1939-04-29	1939-09-27
1940	1940-05-10	1940-09-27
1941	1941-05-11	1941-09-01
1942	1942-04-21	1942-10-07
1943	1943-04-19	1943-10-11
1944	1944-05-05	1944-09-28
1945	1945-05-03	1945-09-14
1946	1946-04-24	1946-09-13
1949	1949-05-08	1949-09-28
1950	1950-05-12	1950-09-23
1951	1951-05-10	1951-09-19
1952	1952-04-18	1952-09-29
1953	1953-05-05	1953-09-21
1954	1954-05-15	1954-09-11
1955	1955-05-19	1955-09-11

Every Fixed Threshold

Fixed thresholds at Lewiston Wtp
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	23	100	1938	70
35 C (95 F): Days	23	54	1938	35
40 C (104 F): Days	22	17	1942	3
45 C (113 F): Days	4	2	1938	1
90 F (32.2 C): Days	23	81	1938	54
100 F (37.8 C): Days	23	27	1938	10
110 F (43.3 C): Days	9	3	1938	1
0 C (32 F): Ice days (max	21	31	1949	14
0 C (32 F): Frost days (min	23	124	1935	111
-10 C (14 F): Days with min	18	27	1949	8
-20 C (-4 F): Days with min	6	9	1950	1
20 C (68 F): Tropical nights (min	17	12	1939	7
25 C (77 F): Days with min	1	1	1937	1
10 mm (0.39 in): Days with 10 mm or more rain	22	16	1940	3
25 mm (0.98 in): Days with 25 mm or more rain	6	2	1955	2
10 cm (3.9 in): Days with 10 cm or more snowfall	3	3	1950	3
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1950	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

Data for Lewiston Wtp 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).

Lewiston Wtp Threshold Days by Year (USC00105236)

Key Facts for Lewiston Wtp Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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