Birney Threshold Days by Year (USC00240819)

18 fixed thresholds counted per year at Birney (USC00240819): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Birney Thresholds

Birney: nights with a minimum temperature at or below 0 C (32 F) in 38 years, most in 1960 with 222.
Birney: nights with a minimum temperature at or below -10 C (14 F) in 38 years, most in 1978 with 107.
Birney: nights with a minimum temperature at or below -20 C (-4 F) in 38 years, most in 1978 with 44.
Birney: days with 10 mm (0.39 in) or more of precipitation in 38 years, most in 1982 with 16.
18 fixed thresholds have at least one qualifying day at Birney.

Days at or above 30 C (86 F)

37 years with a qualifying day

Days per year at Birney with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 101 in 1988.

Days at or above 30 C (86 F) per year at Birney
Year	Days	Decade average
1955	59	59.8
1956	62	59.8
1957	57	59.8
1958	50	59.8
1959	71	59.8
1960	69	61.5
1961	77	61.5
1962	45	61.5
1963	66	61.5
1964	56	61.5
1965	37	61.5
1966	74	61.5
1967	68	61.5
1974	60	55.8
1975	45	55.8
1976	66	55.8
1977	52	55.8
1978	55	55.8
1979	57	55.8
1980	63	68.1
1981	54	68.1
1982	48	68.1
1983	57	68.1
1984	59	68.1
1985	66	68.1
1986	73	68.1
1987	76	68.1
1988	101	68.1
1989	84	68.1
1990	83	65.9
1991	66	65.9
1992	70	65.9
1993	31	65.9
1994	82	65.9
1995	67	65.9
1996	62	65.9
1997	66	65.9

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

First to last qualifying date each year at Birney
Year	First date	Last date
1955	1955-05-01	1955-10-09
1956	1956-05-19	1956-09-26
1957	1957-06-03	1957-10-02
1958	1958-05-11	1958-10-15
1959	1959-06-03	1959-09-14
1960	1960-05-11	1960-10-06
1961	1961-05-10	1961-09-16
1962	1962-04-19	1962-09-06
1963	1963-06-13	1963-10-05
1964	1964-05-17	1964-09-17
1965	1965-05-30	1965-09-01
1966	1966-05-04	1966-09-23
1967	1967-05-23	1967-09-28
1974	1974-04-24	1974-09-09
1975	1975-05-15	1975-10-03
1976	1976-05-28	1976-09-17
1977	1977-04-26	1977-09-14
1978	1978-05-15	1978-09-09
1979	1979-05-16	1979-09-18
1980	1980-04-20	1980-10-04
1981	1981-05-01	1981-09-19
1982	1982-05-02	1982-09-09
1983	1983-05-25	1983-09-07
1984	1984-05-15	1984-09-21
1985	1985-05-02	1985-09-15
1986	1986-04-22	1986-09-08
1987	1987-04-17	1987-10-03
1988	1988-05-13	1988-09-16
1989	1989-04-21	1989-10-10
1990	1990-05-06	1990-10-02
1991	1991-06-11	1991-10-17
1992	1992-04-27	1992-10-04
1993	1993-05-13	1993-10-05
1994	1994-04-17	1994-09-28
1995	1995-06-12	1995-10-11
1996	1996-04-09	1996-10-14
1997	1997-05-16	1997-10-03

Every Fixed Threshold

Fixed thresholds at Birney
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	37	101	1988	66
35 C (95 F): Days	37	57	1988	20
40 C (104 F): Days	16	10	1988	3
90 F (32.2 C): Days	37	83	1988	44
100 F (37.8 C): Days	34	31	1988	1
0 C (32 F): Ice days (max	37	74	1978	30
0 C (32 F): Frost days (min	38	222	1960	184
-10 C (14 F): Days with min	38	107	1978	73
-20 C (-4 F): Days with min	38	44	1978	15
-30 C (-22 F): Days with min	32	13	1985	5
-40 C (-40 F): Days with min	7	2	1989	1
20 C (68 F): Tropical nights (min	15	5	1988	2
25 C (77 F): Days with min	1	1	1988	1
10 mm (0.39 in): Days with 10 mm or more rain	38	16	1982	8
25 mm (0.98 in): Days with 25 mm or more rain	23	5	1997	5
50 mm (1.97 in): Days with 50 mm or more rain	3	1	1978	1
10 cm (3.9 in): Days with 10 cm or more snowfall	21	5	1975	2
25 cm (9.8 in): Days with 25 cm or more snowfall	4	1	1980	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1955.

Download the Data

Data for Birney 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).

Birney Threshold Days by Year (USC00240819)

Key Facts for Birney Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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