Tuttle Threshold Days by Year

18 fixed thresholds counted per year at Tuttle (USC00328850): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Tuttle Thresholds

Tuttle: days with 10 mm (0.39 in) or more of precipitation in 60 years, most in 1986 with 20.
Tuttle: days with 25 mm (0.98 in) or more of precipitation in 56 years, most in 1949 with 6.
Tuttle: days with a maximum temperature at or above 30 C (86 F) in 33 years, most in 1970 with 61.
Tuttle: days with a maximum temperature at or above 90 F (32.2 C) in 33 years, most in 1988 with 38.
18 fixed thresholds have at least one qualifying day at Tuttle.

Days at or above 30 C (86 F)

33 years with a qualifying day

Days per year at Tuttle with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 61 in 1970.

Days at or above 30 C (86 F) per year at Tuttle
Year	Days	Decade average
1962	22	32.1
1963	41	32.1
1964	32	32.1
1965	17	32.1
1966	40	32.1
1967	44	32.1
1968	23	32.1
1969	38	32.1
1970	61	33.9
1971	29	33.9
1972	31	33.9
1973	34	33.9
1974	31	33.9
1975	20	33.9
1976	50	33.9
1977	24	33.9
1978	32	33.9
1979	27	33.9
1980	40	35.5
1981	25	35.5
1982	33	35.5
1983	44	35.5
1984	42	35.5
1985	22	35.5
1986	16	35.5
1987	30	35.5
1988	57	35.5
1989	46	35.5
1990	32	22.4
1991	34	22.4
1992	22	22.4
1993	9	22.4
1994	15	22.4

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

First to last qualifying date each year at Tuttle
Year	First date	Last date
1962	1962-04-24	1962-09-07
1963	1963-05-30	1963-10-05
1964	1964-05-20	1964-09-02
1965	1965-07-15	1965-08-16
1966	1966-05-21	1966-09-13
1967	1967-05-22	1967-09-12
1968	1968-06-03	1968-09-14
1969	1969-05-14	1969-09-12
1970	1970-05-17	1970-10-06
1971	1971-07-02	1971-09-03
1972	1972-05-17	1972-09-20
1973	1973-06-02	1973-09-01
1974	1974-06-20	1974-09-27
1975	1975-05-17	1975-08-24
1976	1976-06-03	1976-10-01
1977	1977-04-09	1977-08-10
1978	1978-06-10	1978-09-11
1979	1979-05-29	1979-09-27
1980	1980-04-21	1980-10-01
1981	1981-06-28	1981-09-13
1982	1982-05-04	1982-09-11
1983	1983-06-11	1983-09-28
1984	1984-05-17	1984-09-22
1985	1985-05-04	1985-08-23
1986	1986-05-05	1986-08-25
1987	1987-04-19	1987-09-04
1988	1988-05-25	1988-08-25
1989	1989-06-07	1989-10-01
1990	1990-04-23	1990-09-26
1991	1991-06-12	1991-09-08
1992	1992-05-01	1992-10-02
1993	1993-05-14	1993-08-25
1994	1994-05-18	1994-09-10

Every Fixed Threshold

Fixed thresholds at Tuttle
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	33	61	1970	15
35 C (95 F): Days	31	22	1988	1
40 C (104 F): Days	4	2	1973	2
90 F (32.2 C): Days	33	38	1988	6
100 F (37.8 C): Days	15	7	1988	2
0 C (32 F): Ice days (max	33	115	1975	92
0 C (32 F): Frost days (min	33	213	1979	176
-10 C (14 F): Days with min	33	128	1979	93
-20 C (-4 F): Days with min	33	69	1978	45
-30 C (-22 F): Days with min	32	20	1979	15
-40 C (-40 F): Days with min	1	1	1994	1
20 C (68 F): Tropical nights (min	19	6	1987	1
10 mm (0.39 in): Days with 10 mm or more rain	60	20	1986	16
25 mm (0.98 in): Days with 25 mm or more rain	56	6	1949	2
50 mm (1.97 in): Days with 50 mm or more rain	16	2	1937	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1957	1
10 cm (3.9 in): Days with 10 cm or more snowfall	33	9	1950	4
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1966	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1962.

Download the Data

Data for Tuttle 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).

Tuttle Threshold Days by Year

Key Facts for Tuttle Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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