Otis Threshold Days by Year (USC00296465)

14 fixed thresholds counted per year at Otis (USC00296465): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Otis Thresholds

Otis: days with 10 mm (0.39 in) or more of precipitation in 52 years, most in 1912 with 14.
Otis: days with a maximum temperature at or above 30 C (86 F) in 43 years, most in 2020 with 70.
Otis: days with a maximum temperature at or below 0 C (32 F) in 43 years, most in 1974 with 37.
Otis: nights with a minimum temperature at or below 0 C (32 F) in 43 years, most in 2006 with 182.
14 fixed thresholds have at least one qualifying day at Otis.

Days at or above 30 C (86 F)

43 years with a qualifying day

Days per year at Otis with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 70 in 2020.

Days at or above 30 C (86 F) per year at Otis
Year	Days	Decade average
1958	48	48.5
1959	49	48.5
1960	55	33.3
1961	45	33.3
1962	39	33.3
1963	36	33.3
1964	27	33.3
1965	15	33.3
1966	33	33.3
1967	22	33.3
1968	25	33.3
1969	36	33.3
1970	37	32.3
1971	43	32.3
1972	37	32.3
1973	21	32.3
1974	31	32.3
1975	21	32.3
1976	30	32.3
1979	38	32.3
1980	48	31
1981	39	31
1982	18	31
1983	29	31
1984	36	31
1985	42	31
1986	29	31
1987	19	31
1988	24	31
1989	26	31
1990	36	30.8
1991	19	30.8
1992	26	30.8
1996	42	30.8
2002	53	51.3
2006	50	51.3
2007	53	51.3
2008	49	51.3
2014	50	57
2017	51	57
2018	63	57
2019	64	57
2020	70	70

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

First to last qualifying date each year at Otis
Year	First date	Last date
1958	1958-05-28	1958-09-01
1959	1959-06-06	1959-09-09
1960	1960-06-17	1960-09-05
1961	1961-06-09	1961-08-28
1962	1962-06-19	1962-09-19
1963	1963-06-20	1963-08-16
1964	1964-06-15	1964-09-01
1965	1965-07-03	1965-08-28
1966	1966-06-19	1966-08-19
1967	1967-07-01	1967-08-26
1968	1968-06-17	1968-07-22
1969	1969-06-28	1969-08-27
1970	1970-06-23	1970-08-30
1971	1971-06-15	1971-09-12
1972	1972-06-28	1972-08-24
1973	1973-06-09	1973-08-24
1974	1974-06-13	1974-08-18
1975	1975-06-27	1975-08-31
1976	1976-06-20	1976-09-04
1979	1979-06-13	1979-09-28
1980	1980-06-10	1980-08-11
1981	1981-06-07	1981-09-21
1982	1982-06-27	1982-09-07
1983	1983-06-18	1983-09-03
1984	1984-05-14	1984-08-30
1985	1985-06-07	1985-08-31
1986	1986-06-16	1986-08-21
1987	1987-06-12	1987-08-19
1988	1988-06-09	1988-08-14
1989	1989-06-16	1989-08-06
1990	1990-06-04	1990-09-13
1991	1991-06-24	1991-08-30
1992	1992-06-17	1992-08-20
1996	1996-06-04	1996-08-19
2002	2002-05-30	2002-09-05
2006	2006-05-29	2006-08-12
2007	2007-06-16	2007-08-29
2008	2008-06-15	2008-08-30
2014	2014-05-28	2014-09-20
2017	2017-06-05	2017-09-11
2018	2018-06-04	2018-09-17
2019	2019-06-26	2019-09-07
2020	2020-06-02	2020-09-07

Every Fixed Threshold

Fixed thresholds at Otis
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	43	70	2020	70
35 C (95 F): Days	16	10	2007	2
90 F (32.2 C): Days	41	40	2020	40
100 F (37.8 C): Days	1	2	2007	2
0 C (32 F): Ice days (max	43	37	1974	8
0 C (32 F): Frost days (min	43	182	2006	118
-10 C (14 F): Days with min	43	49	1974	26
-20 C (-4 F): Days with min	14	5	1963	4
20 C (68 F): Tropical nights (min	9	11	2007	4
10 mm (0.39 in): Days with 10 mm or more rain	52	14	1912	4
25 mm (0.98 in): Days with 25 mm or more rain	30	4	1913	4
50 mm (1.97 in): Days with 50 mm or more rain	3	1	1911	1
10 cm (3.9 in): Days with 10 cm or more snowfall	34	6	1969	1
25 cm (9.8 in): Days with 25 cm or more snowfall	6	1	1911	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1958.

Download the Data

Data for Otis 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Otis Threshold Days by Year (USC00296465)

Key Facts for Otis Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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