Kempton Threshold Days by Year

4 fixed thresholds counted per year at Kempton (ASN00063193): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Kempton Thresholds

Kempton: days with 10 mm (0.39 in) or more of precipitation in 41 years, most in 1917 with 43.
Kempton: days with 25 mm (0.98 in) or more of precipitation in 40 years, most in 1928 with 10.
Kempton: days with 50 mm (1.97 in) or more of precipitation in 19 years, most in 1925 with 3.
Kempton: days with 100 mm (3.94 in) or more of precipitation in 2 years, most in 1914 with 1.
4 fixed thresholds have at least one qualifying day at Kempton.

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

41 years with a qualifying day

Days per year at Kempton with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 43 in 1917.

Days with 10 mm (0.39 in) or more of precipitation per year at Kempton
Year	Days	Decade average
1903	24	23.2
1904	21	23.2
1905	20	23.2
1906	32	23.2
1907	22	23.2
1908	20	23.2
1910	21	24
1911	21	24
1912	18	24
1913	20	24
1914	23	24
1915	21	24
1916	41	24
1917	43	24
1918	18	24
1919	14	24
1920	20	24.4
1921	30	24.4
1922	22	24.4
1923	22	24.4
1924	27	24.4
1925	24	24.4
1926	31	24.4
1927	23	24.4
1928	26	24.4
1929	19	24.4
1930	21	22.9
1931	38	22.9
1932	18	22.9
1933	18	22.9
1934	24	22.9
1935	27	22.9
1936	29	22.9
1937	14	22.9
1938	20	22.9
1939	20	22.9
1940	14	21
1941	22	21
1942	28	21
1943	28	21
1944	13	21

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

First to last qualifying date each year at Kempton
Year	First date	Last date
1903	1903-02-17	1903-12-20
1904	1904-01-02	1904-12-17
1905	1905-02-03	1905-10-30
1906	1906-01-11	1906-12-24
1907	1907-01-26	1907-12-17
1908	1908-01-09	1908-12-02
1910	1910-01-11	1910-12-12
1911	1911-01-03	1911-12-04
1912	1912-06-09	1912-12-24
1913	1913-01-03	1913-12-24
1914	1914-01-11	1914-12-30
1915	1915-01-07	1915-12-29
1916	1916-01-28	1916-12-24
1917	1917-01-01	1917-12-12
1918	1918-01-10	1918-09-16
1919	1919-03-06	1919-12-29
1920	1920-01-17	1920-12-05
1921	1921-01-02	1921-12-30
1922	1922-01-07	1922-12-09
1923	1923-01-26	1923-12-26
1924	1924-01-02	1924-12-14
1925	1925-01-14	1925-11-20
1926	1926-01-03	1926-12-20
1927	1927-01-05	1927-12-28
1928	1928-01-06	1928-11-03
1929	1929-02-11	1929-12-27
1930	1930-02-22	1930-12-16
1931	1931-01-01	1931-12-21
1932	1932-03-03	1932-12-23
1933	1933-01-21	1933-12-07
1934	1934-01-06	1934-12-08
1935	1935-01-04	1935-12-26
1936	1936-01-04	1936-12-26
1937	1937-01-08	1937-12-30
1938	1938-01-16	1938-11-01
1939	1939-01-04	1939-12-13
1940	1940-01-07	1940-12-20
1941	1941-01-02	1941-12-06
1942	1942-02-14	1942-12-27
1943	1943-01-03	1943-12-06
1944	1944-03-10	1944-11-30

Every Fixed Threshold

Fixed thresholds at Kempton
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	41	43	1917	13
25 mm (0.98 in): Days with 25 mm or more rain	40	10	1928	6
50 mm (1.97 in): Days with 50 mm or more rain	19	3	1925	2
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1914	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1903.

Download the Data

Data for Kempton 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).

Kempton Threshold Days by Year

Key Facts for Kempton Thresholds

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

Every Fixed Threshold

Download the Data

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