Amber Threshold Days by Year

5 fixed thresholds counted per year at Amber (IN019130100): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Amber Thresholds

Amber: days with 10 mm (0.39 in) or more of precipitation in 52 years, most in 1917 with 44.
Amber: days with 25 mm (0.98 in) or more of precipitation in 52 years, most in 1924 with 17.
Amber: days with 50 mm (1.97 in) or more of precipitation in 41 years, most in 1917 with 7.
Amber: days with 100 mm (3.94 in) or more of precipitation in 14 years, most in 1920 with 2.
5 fixed thresholds have at least one qualifying day at Amber.

Days with 10 mm (0.39 in) or more of precipitation

52 years with a qualifying day

Days per year at Amber with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 44 in 1917.

Days with 10 mm (0.39 in) or more of precipitation per year at Amber
Year	Days	Decade average
1917	44	24.3
1918	8	24.3
1919	21	24.3
1920	21	19.1
1921	12	19.1
1922	13	19.1
1923	18	19.1
1924	34	19.1
1925	16	19.1
1926	23	19.1
1927	17	19.1
1928	14	19.1
1929	23	19.1
1930	18	17.4
1931	20	17.4
1932	18	17.4
1933	28	17.4
1934	25	17.4
1935	20	17.4
1936	16	17.4
1937	12	17.4
1938	8	17.4
1939	9	17.4
1940	17	19
1941	8	19
1942	26	19
1943	19	19
1944	18	19
1945	22	19
1946	23	19
1947	22	19
1948	19	19
1949	16	19
1950	20	20.4
1951	13	20.4
1952	10	20.4
1953	9	20.4
1954	19	20.4
1955	24	20.4
1956	29	20.4
1957	29	20.4
1958	23	20.4
1959	28	20.4
1960	19	17.4
1961	22	17.4
1962	18	17.4
1963	15	17.4
1964	20	17.4
1966	15	17.4
1968	14	17.4
1969	16	17.4
1970	20	20

For each year, a bar from the first to the last day at Amber meeting 10 mm (0.39 in).

First to last qualifying date each year at Amber
Year	First date	Last date
1917	1917-05-19	1917-10-25
1918	1918-08-04	1918-09-04
1919	1919-01-19	1919-09-22
1920	1920-01-12	1920-08-29
1921	1921-07-16	1921-09-21
1922	1922-06-25	1922-12-13
1923	1923-02-23	1923-12-03
1924	1924-01-05	1924-12-09
1925	1925-06-02	1925-11-06
1926	1926-03-14	1926-09-14
1927	1927-07-05	1927-12-19
1928	1928-02-02	1928-11-30
1929	1929-06-14	1929-12-20
1930	1930-01-14	1930-10-30
1931	1931-07-02	1931-10-16
1932	1932-03-25	1932-09-07
1933	1933-04-16	1933-09-26
1934	1934-06-17	1934-09-04
1935	1935-01-29	1935-12-12
1936	1936-06-21	1936-11-15
1937	1937-02-12	1937-09-15
1938	1938-01-01	1938-08-31
1939	1939-02-28	1939-08-31
1940	1940-02-01	1940-09-15
1941	1941-06-01	1941-09-19
1942	1942-02-12	1942-09-05
1943	1943-04-13	1943-09-15
1944	1944-01-24	1944-10-05
1945	1945-01-01	1945-09-25
1946	1946-02-18	1946-10-04
1947	1947-01-04	1947-12-21
1948	1948-01-02	1948-09-26
1949	1949-06-01	1949-09-29
1950	1950-07-07	1950-09-19
1951	1951-03-25	1951-11-25
1952	1952-04-01	1952-08-25
1953	1953-06-17	1953-09-28
1954	1954-02-04	1954-10-01
1955	1955-06-07	1955-10-05
1956	1956-03-12	1956-10-11
1957	1957-01-09	1957-09-13
1958	1958-06-29	1958-11-29
1959	1959-01-19	1959-11-06
1960	1960-03-06	1960-09-12
1961	1961-02-02	1961-11-15
1962	1962-03-27	1962-09-21
1963	1963-07-03	1963-12-30
1964	1964-05-12	1964-09-21
1966	1966-02-13	1966-09-23
1968	1968-01-04	1968-08-20
1969	1969-03-20	1969-09-12
1970	1970-01-20	1970-09-03

Every Fixed Threshold

Fixed thresholds at Amber
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	52	44	1917	20
25 mm (0.98 in): Days with 25 mm or more rain	52	17	1924	10
50 mm (1.97 in): Days with 50 mm or more rain	41	7	1917	5
100 mm (3.94 in): Days with 100 mm or more rain	14	2	1920	1
200 mm (7.87 in): Days with 200 mm or more rain	2	1	1924	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1917.

Download the Data

Data for Amber 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).

Amber Threshold Days by Year

Key Facts for Amber Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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