Greenwater Threshold Days by Year (USC00453357)

13 fixed thresholds counted per year at Greenwater (USC00453357): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Greenwater Thresholds

Greenwater: days with 10 mm (0.39 in) or more of precipitation in 36 years, most in 1948 with 64.
Greenwater: days with 25 mm (0.98 in) or more of precipitation in 36 years, most in 1958 with 21.
Greenwater: days with 10 cm (3.9 in) or more of snowfall in 35 years, most in 1964 with 15.
Greenwater: days with a maximum temperature at or below 0 C (32 F) in 34 years, most in 1949 with 36.
13 fixed thresholds have at least one qualifying day at Greenwater.

Days at or above 30 C (86 F)

32 years with a qualifying day

Days per year at Greenwater with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 26 in 1967.

Days at or above 30 C (86 F) per year at Greenwater
Year	Days	Decade average
1939	13	13
1940	2	3.6
1941	10	3.6
1944	5	3.6
1945	5	3.6
1946	3	3.6
1947	1	3.6
1948	1	3.6
1949	2	3.6
1951	7	7.4
1952	10	7.4
1953	2	7.4
1955	2	7.4
1956	11	7.4
1958	15	7.4
1959	5	7.4
1960	8	9.8
1961	13	9.8
1962	2	9.8
1963	5	9.8
1967	26	9.8
1968	5	9.8
1970	12	10.1
1971	13	10.1
1972	8	10.1
1973	8	10.1
1974	13	10.1
1975	7	10.1
1977	13	10.1
1978	7	10.1
1979	10	10.1
1980	5	5

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

First to last qualifying date each year at Greenwater
Year	First date	Last date
1939	1939-05-14	1939-08-21
1940	1940-08-17	1940-08-18
1941	1941-06-11	1941-08-19
1944	1944-05-28	1944-09-11
1945	1945-07-08	1945-08-07
1946	1946-07-20	1946-08-19
1947	1947-05-27	1947-05-27
1948	1948-06-08	1948-06-08
1949	1949-07-15	1949-09-28
1951	1951-06-30	1951-09-16
1952	1952-07-07	1952-09-22
1953	1953-07-07	1953-08-14
1955	1955-06-09	1955-09-05
1956	1956-05-17	1956-08-22
1958	1958-05-18	1958-09-07
1959	1959-07-18	1959-07-31
1960	1960-07-05	1960-08-09
1961	1961-06-15	1961-08-22
1962	1962-07-23	1962-07-27
1963	1963-05-20	1963-09-27
1967	1967-06-19	1967-09-27
1968	1968-06-25	1968-07-31
1970	1970-06-01	1970-10-02
1971	1971-05-11	1971-10-05
1972	1972-05-28	1972-09-02
1973	1973-05-14	1973-09-05
1974	1974-07-31	1974-09-24
1975	1975-06-01	1975-10-01
1977	1977-06-17	1977-08-18
1978	1978-06-02	1978-08-09
1979	1979-07-15	1979-09-24
1980	1980-05-04	1980-10-05

Every Fixed Threshold

Fixed thresholds at Greenwater
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	32	26	1967	5
35 C (95 F): Days	13	5	1941	1
90 F (32.2 C): Days	26	13	1967	2
100 F (37.8 C): Days	3	2	1941	1
0 C (32 F): Ice days (max	34	36	1949	12
0 C (32 F): Frost days (min	30	175	1955	134
-10 C (14 F): Days with min	25	14	1949	7
-20 C (-4 F): Days with min	2	1	1968	1
10 mm (0.39 in): Days with 10 mm or more rain	36	64	1948	49
25 mm (0.98 in): Days with 25 mm or more rain	36	21	1958	3
50 mm (1.97 in): Days with 50 mm or more rain	23	5	1959	1
10 cm (3.9 in): Days with 10 cm or more snowfall	35	15	1964	10
25 cm (9.8 in): Days with 25 cm or more snowfall	14	3	1971	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.

Download the Data

Data for Greenwater 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).

Greenwater Threshold Days by Year (USC00453357)

Key Facts for Greenwater Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related