Glen 4 N Threshold Days by Year (USC00243570)

12 fixed thresholds counted per year at Glen 4 N (USC00243570): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Glen 4 N Thresholds

Glen 4 N: days with 10 mm (0.39 in) or more of precipitation in 45 years, most in 1983 with 11.
Glen 4 N: nights with a minimum temperature at or below 0 C (32 F) in 40 years, most in 1973 with 220.
Glen 4 N: nights with a minimum temperature at or below -10 C (14 F) in 40 years, most in 1969 with 99.
Glen 4 N: nights with a minimum temperature at or below -20 C (-4 F) in 40 years, most in 1979 with 35.
12 fixed thresholds have at least one qualifying day at Glen 4 N.

Days at or above 30 C (86 F)

24 years with a qualifying day

Days per year at Glen 4 N with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 48 in 1988.

Days at or above 30 C (86 F) per year at Glen 4 N
Year	Days	Decade average
1959	29	29
1960	30	30.1
1961	41	30.1
1964	27	30.1
1965	9	30.1
1966	42	30.1
1967	27	30.1
1968	25	30.1
1969	40	30.1
1970	47	27
1971	34	27
1972	13	27
1973	31	27
1974	32	27
1975	17	27
1978	16	27
1979	26	27
1983	15	28.6
1985	32	28.6
1986	32	28.6
1988	48	28.6
1989	16	28.6
1992	26	26
2005	42	42

For each year, a bar from the first to the last day at Glen 4 N meeting 30 C (86 F).

First to last qualifying date each year at Glen 4 N
Year	First date	Last date
1959	1959-06-12	1959-09-11
1960	1960-07-08	1960-08-30
1961	1961-06-16	1961-08-22
1964	1964-07-07	1964-08-18
1965	1965-06-11	1965-08-11
1966	1966-05-05	1966-09-23
1967	1967-07-12	1967-09-08
1968	1968-06-26	1968-08-12
1969	1969-06-04	1969-09-09
1970	1970-06-04	1970-08-30
1971	1971-06-21	1971-08-28
1972	1972-07-24	1972-08-18
1973	1973-06-12	1973-08-21
1974	1974-06-12	1974-08-27
1975	1975-07-03	1975-08-07
1978	1978-07-14	1978-09-02
1979	1979-06-11	1979-10-04
1983	1983-05-27	1983-08-28
1985	1985-06-07	1985-08-30
1986	1986-05-27	1986-08-28
1988	1988-05-24	1988-09-06
1989	1989-07-03	1989-07-31
1992	1992-05-05	1992-08-27
2005	2005-06-20	2005-09-08

Every Fixed Threshold

Fixed thresholds at Glen 4 N
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	24	48	1988	42
35 C (95 F): Days	15	9	2005	9
90 F (32.2 C): Days	24	27	2005	27
100 F (37.8 C): Days	3	2	1960	1
0 C (32 F): Ice days (max	24	57	1985	30
0 C (32 F): Frost days (min	40	220	1973	239
-10 C (14 F): Days with min	40	99	1969	94
-20 C (-4 F): Days with min	40	35	1979	19
-30 C (-22 F): Days with min	27	9	1972	3
10 mm (0.39 in): Days with 10 mm or more rain	45	11	1983	6
25 mm (0.98 in): Days with 25 mm or more rain	11	2	1965	1
10 cm (3.9 in): Days with 10 cm or more snowfall	14	3	1959	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1959.

Download the Data

Data for Glen 4 N 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).

Glen 4 N Threshold Days by Year (USC00243570)

Key Facts for Glen 4 N Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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