Lewiston AP Threshold Days by Year (USW00024149)

17 fixed thresholds counted per year at Lewiston AP (USW00024149): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lewiston AP Thresholds

Lewiston AP: days with a maximum temperature at or above 30 C (86 F) in 79 years, most in 2023 with 90.
Lewiston AP: days with a maximum temperature at or above 35 C (95 F) in 79 years, most in 2021 with 47.
Lewiston AP: days with a maximum temperature at or above 90 F (32.2 C) in 79 years, most in 2021 with 70.
Lewiston AP: nights with a minimum temperature at or below 0 C (32 F) in 79 years, most in 1955 with 140.
17 fixed thresholds have at least one qualifying day at Lewiston AP.

Days at or above 30 C (86 F)

79 years with a qualifying day

Days per year at Lewiston AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 90 in 2023.

Days at or above 30 C (86 F) per year at Lewiston AP
Year	Days	Decade average
1948	44	52.5
1949	61	52.5
1950	59	55.4
1951	56	55.4
1952	60	55.4
1953	52	55.4
1954	41	55.4
1955	56	55.4
1956	57	55.4
1957	49	55.4
1958	75	55.4
1959	49	55.4
1960	59	58.3
1961	70	58.3
1962	44	58.3
1963	62	58.3
1964	40	58.3
1965	46	58.3
1966	66	58.3
1967	81	58.3
1968	49	58.3
1969	66	58.3
1970	69	61.9
1971	57	61.9
1972	59	61.9
1973	72	61.9
1974	73	61.9
1975	59	61.9
1976	47	61.9
1977	63	61.9
1978	46	61.9
1979	74	61.9
1980	41	58.8
1981	64	58.8
1982	58	58.8
1983	55	58.8
1984	61	58.8
1985	58	58.8
1986	64	58.8
1987	69	58.8
1988	67	58.8
1989	51	58.8
1990	71	55.9
1991	50	55.9
1992	58	55.9
1993	39	55.9
1994	72	55.9
1995	48	55.9
1996	51	55.9
1997	52	55.9
1998	64	55.9
1999	54	55.9
2000	48	65.3
2001	71	65.3
2002	56	65.3
2003	78	65.3
2004	60	65.3
2005	60	65.3
2006	72	65.3
2007	73	65.3
2008	65	65.3
2009	70	65.3
2010	53	69.3
2011	59	69.3
2012	74	69.3
2013	86	69.3
2014	69	69.3
2015	78	69.3
2016	63	69.3
2017	81	69.3
2018	62	69.3
2019	68	69.3
2020	63	77.6
2021	81	77.6
2022	73	77.6
2023	90	77.6
2024	80	77.6
2025	90	77.6
2026	66	77.6

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

First to last qualifying date each year at Lewiston AP
Year	First date	Last date
1948	1948-05-26	1948-09-14
1949	1949-05-09	1949-09-27
1950	1950-06-04	1950-09-23
1951	1951-05-22	1951-09-19
1952	1952-04-24	1952-09-26
1953	1953-05-06	1953-09-21
1954	1954-05-17	1954-09-10
1955	1955-06-08	1955-09-10
1956	1956-05-17	1956-09-19
1957	1957-05-29	1957-09-25
1958	1958-05-18	1958-09-10
1959	1959-05-13	1959-09-13
1960	1960-05-10	1960-09-19
1961	1961-05-25	1961-08-30
1962	1962-06-19	1962-09-26
1963	1963-05-20	1963-09-29
1964	1964-05-16	1964-09-16
1965	1965-05-28	1965-09-01
1966	1966-05-02	1966-09-22
1967	1967-05-21	1967-09-28
1968	1968-05-19	1968-09-10
1969	1969-05-10	1969-09-12
1970	1970-05-16	1970-09-01
1971	1971-05-11	1971-09-10
1972	1972-05-28	1972-09-16
1973	1973-05-13	1973-09-13
1974	1974-06-11	1974-09-25
1975	1975-05-31	1975-10-02
1976	1976-05-13	1976-09-30
1977	1977-04-22	1977-09-04
1978	1978-06-02	1978-09-26
1979	1979-05-22	1979-09-24
1980	1980-04-28	1980-10-06
1981	1981-04-30	1981-09-18
1982	1982-05-25	1982-09-18
1983	1983-05-23	1983-09-06
1984	1984-05-29	1984-09-18
1985	1985-05-16	1985-08-29
1986	1986-05-25	1986-09-04
1987	1987-04-27	1987-10-02
1988	1988-05-11	1988-09-15
1989	1989-06-01	1989-09-29
1990	1990-05-05	1990-09-29
1991	1991-06-10	1991-09-27
1992	1992-05-05	1992-09-29
1993	1993-05-10	1993-09-11
1994	1994-05-07	1994-09-27
1995	1995-05-29	1995-09-17
1996	1996-06-02	1996-09-12
1997	1997-06-15	1997-09-25
1998	1998-05-01	1998-09-17
1999	1999-05-23	1999-09-23
2000	2000-06-04	2000-09-14
2001	2001-05-22	2001-09-24
2002	2002-06-13	2002-09-15
2003	2003-05-24	2003-09-28
2004	2004-06-04	2004-09-08
2005	2005-05-27	2005-09-08
2006	2006-05-15	2006-09-12
2007	2007-05-08	2007-10-09
2008	2008-05-16	2008-10-01
2009	2009-05-17	2009-09-26
2010	2010-05-16	2010-10-01
2011	2011-05-14	2011-09-24
2012	2012-05-14	2012-09-20
2013	2013-05-06	2013-09-20
2014	2014-05-15	2014-10-07
2015	2015-04-28	2015-09-20
2016	2016-04-20	2016-09-27
2017	2017-05-04	2017-09-12
2018	2018-04-27	2018-09-07
2019	2019-05-11	2019-09-12
2020	2020-05-29	2020-09-11
2021	2021-05-06	2021-09-25
2022	2022-06-02	2022-09-28
2023	2023-04-29	2023-09-17
2024	2024-05-11	2024-09-28
2025	2025-05-02	2025-09-25
2026	2026-05-12	2026-09-21

Every Fixed Threshold

Fixed thresholds at Lewiston AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	79	90	2023	66
35 C (95 F): Days	79	47	2021	20
40 C (104 F): Days	56	10	2024	1
45 C (113 F): Days	2	2	2021	2
90 F (32.2 C): Days	79	70	2021	46
100 F (37.8 C): Days	74	24	2021	5
110 F (43.3 C): Days	7	3	2021	2
0 C (32 F): Ice days (max	77	56	1985	8
0 C (32 F): Frost days (min	79	140	1955	38
-10 C (14 F): Days with min	70	32	1949	3
-20 C (-4 F): Days with min	19	11	1950	2
-30 C (-22 F): Days with min	2	1	1950	1
20 C (68 F): Tropical nights (min	73	27	2021	7
25 C (77 F): Days with min	4	3	2015	3
10 mm (0.39 in): Days with 10 mm or more rain	79	13	1956	11
25 mm (0.98 in): Days with 25 mm or more rain	20	2	1955	1
10 cm (3.9 in): Days with 10 cm or more snowfall	31	3	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 1948.

Download the Data

Data for Lewiston AP 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Lewiston AP Threshold Days by Year (USW00024149)

Key Facts for Lewiston AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related