Chapman Threshold Days by Year (USC00141435)
21 fixed thresholds counted per year at Chapman (USC00141435): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Chapman Thresholds
- Chapman: days with 10 mm (0.39 in) or more of precipitation in 100 years, most in 1993 with 48.
- Chapman: days with 25 mm (0.98 in) or more of precipitation in 100 years, most in 1927 with 17.
- Chapman: days with 50 mm (1.97 in) or more of precipitation in 90 years, most in 1929 with 5.
- Chapman: nights with a minimum temperature at or below 0 C (32 F) in 58 years, most in 1924 with 145.
- 21 fixed thresholds have at least one qualifying day at Chapman.
Days at or above 30 C (86 F)
57 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1908 | 80 | 91 |
| 1909 | 102 | 91 |
| 1910 | 94 | 93.9 |
| 1911 | 107 | 93.9 |
| 1914 | 101 | 93.9 |
| 1915 | 58 | 93.9 |
| 1916 | 101 | 93.9 |
| 1917 | 94 | 93.9 |
| 1918 | 107 | 93.9 |
| 1919 | 89 | 93.9 |
| 1920 | 91 | 96.1 |
| 1921 | 115 | 96.1 |
| 1922 | 100 | 96.1 |
| 1923 | 85 | 96.1 |
| 1924 | 94 | 96.1 |
| 1925 | 103 | 96.1 |
| 1926 | 109 | 96.1 |
| 1927 | 90 | 96.1 |
| 1928 | 94 | 96.1 |
| 1929 | 80 | 96.1 |
| 1930 | 97 | 104.9 |
| 1931 | 113 | 104.9 |
| 1932 | 101 | 104.9 |
| 1933 | 107 | 104.9 |
| 1934 | 107 | 104.9 |
| 1935 | 76 | 104.9 |
| 1936 | 110 | 104.9 |
| 1937 | 101 | 104.9 |
| 1938 | 117 | 104.9 |
| 1939 | 120 | 104.9 |
| 1940 | 107 | 90.7 |
| 1941 | 95 | 90.7 |
| 1942 | 80 | 90.7 |
| 1943 | 75 | 90.7 |
| 1944 | 87 | 90.7 |
| 1945 | 76 | 90.7 |
| 1946 | 83 | 90.7 |
| 1947 | 110 | 90.7 |
| 1948 | 101 | 90.7 |
| 1949 | 93 | 90.7 |
| 1950 | 72 | 90.5 |
| 1951 | 57 | 90.5 |
| 1952 | 117 | 90.5 |
| 1953 | 116 | 90.5 |
| 2010 | 87 | 85 |
| 2011 | 89 | 85 |
| 2012 | 104 | 85 |
| 2013 | 77 | 85 |
| 2014 | 76 | 85 |
| 2015 | 75 | 85 |
| 2016 | 80 | 85 |
| 2017 | 77 | 85 |
| 2018 | 100 | 85 |
| 2023 | 107 | 103 |
| 2024 | 101 | 103 |
| 2025 | 88 | 103 |
| 2026 | 116 | 103 |
| Year | First date | Last date |
|---|---|---|
| 1908 | 1908-03-25 | 1908-10-14 |
| 1909 | 1909-04-17 | 1909-11-04 |
| 1910 | 1910-03-21 | 1910-10-17 |
| 1911 | 1911-04-02 | 1911-09-28 |
| 1914 | 1914-05-23 | 1914-10-18 |
| 1915 | 1915-04-28 | 1915-09-19 |
| 1916 | 1916-03-12 | 1916-10-07 |
| 1917 | 1917-03-30 | 1917-10-15 |
| 1918 | 1918-03-13 | 1918-10-06 |
| 1919 | 1919-05-29 | 1919-10-03 |
| 1920 | 1920-05-18 | 1920-10-12 |
| 1921 | 1921-04-23 | 1921-10-24 |
| 1922 | 1922-06-05 | 1922-10-28 |
| 1923 | 1923-05-27 | 1923-09-29 |
| 1924 | 1924-04-07 | 1924-11-03 |
| 1925 | 1925-04-12 | 1925-10-03 |
| 1926 | 1926-04-17 | 1926-09-30 |
| 1927 | 1927-04-26 | 1927-10-27 |
| 1928 | 1928-03-22 | 1928-10-15 |
| 1929 | 1929-04-03 | 1929-10-17 |
| 1930 | 1930-04-09 | 1930-10-10 |
| 1931 | 1931-04-07 | 1931-10-10 |
| 1932 | 1932-04-01 | 1932-10-18 |
| 1933 | 1933-05-08 | 1933-09-26 |
| 1934 | 1934-04-09 | 1934-10-08 |
| 1935 | 1935-04-14 | 1935-10-15 |
| 1936 | 1936-04-12 | 1936-09-22 |
| 1937 | 1937-04-16 | 1937-10-29 |
| 1938 | 1938-03-21 | 1938-10-25 |
| 1939 | 1939-04-23 | 1939-10-26 |
| 1940 | 1940-03-31 | 1940-10-25 |
| 1941 | 1941-05-14 | 1941-10-13 |
| 1942 | 1942-04-04 | 1942-10-02 |
| 1943 | 1943-03-29 | 1943-10-10 |
| 1944 | 1944-05-12 | 1944-09-22 |
| 1945 | 1945-05-13 | 1945-10-18 |
| 1946 | 1946-03-31 | 1946-09-26 |
| 1947 | 1947-04-30 | 1947-10-21 |
| 1948 | 1948-04-06 | 1948-09-22 |
| 1949 | 1949-04-22 | 1949-10-08 |
| 1950 | 1950-03-25 | 1950-10-31 |
| 1951 | 1951-05-30 | 1951-10-03 |
| 1952 | 1952-04-08 | 1952-10-25 |
| 1953 | 1953-04-21 | 1953-10-18 |
| 2010 | 2010-04-06 | 2010-10-09 |
| 2011 | 2011-04-04 | 2011-10-05 |
| 2012 | 2012-04-01 | 2012-10-24 |
| 2013 | 2013-04-30 | 2013-10-05 |
| 2014 | 2014-04-13 | 2014-10-27 |
| 2015 | 2015-03-17 | 2015-10-12 |
| 2016 | 2016-04-06 | 2016-10-18 |
| 2017 | 2017-03-20 | 2017-10-07 |
| 2018 | 2018-04-13 | 2018-10-04 |
| 2023 | 2023-04-05 | 2023-10-24 |
| 2024 | 2024-04-14 | 2024-10-29 |
| 2025 | 2025-04-14 | 2025-10-13 |
| 2026 | 2026-03-20 | 2026-10-13 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 57 | 120 | 1939 | 116 |
| 35 C (95 F): Days | 57 | 74 | 1936 | 32 |
| 40 C (104 F): Days | 41 | 36 | 1936 | 1 |
| 45 C (113 F): Days | 2 | 6 | 1936 | 1 |
| 90 F (32.2 C): Days | 57 | 99 | 1953 | 75 |
| 100 F (37.8 C): Days | 55 | 57 | 1936 | 18 |
| 110 F (43.3 C): Days | 12 | 9 | 1936 | 2 |
| 0 C (32 F): Ice days (max | 57 | 37 | 1916 | 10 |
| 0 C (32 F): Frost days (min | 58 | 145 | 1924 | 70 |
| -10 C (14 F): Days with min | 58 | 47 | 1916 | 14 |
| -20 C (-4 F): Days with min | 48 | 13 | 1914 | 4 |
| -30 C (-22 F): Days with min | 5 | 2 | 1930 | 1 |
| 20 C (68 F): Tropical nights (min | 58 | 65 | 1938 | 55 |
| 25 C (77 F): Days with min | 44 | 17 | 1936 | 6 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 100 | 48 | 1993 | 24 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 100 | 17 | 1927 | 12 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 90 | 5 | 1929 | 7 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 18 | 2 | 1950 | 1 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 1 | 1 | 1933 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 46 | 8 | 1983 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 6 | 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 1908.
Download the Data
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 . Last revised (2026-10-17).