US Magnetic Obsy Threshold Days by Year
9 fixed thresholds counted per year at US Magnetic Obsy (USC00518805): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for US Magnetic Obsy Thresholds
- US Magnetic Obsy: days with a maximum temperature at or above 30 C (86 F) in 31 years, most in 1919 with 168.
- US Magnetic Obsy: nights with a minimum temperature at or above 20 C (68 F) in 31 years, most in 1906 with 198.
- US Magnetic Obsy: days with a maximum temperature at or above 90 F (32.2 C) in 27 years, most in 1915 with 38.
- US Magnetic Obsy: days with 10 mm (0.39 in) or more of precipitation in 23 years, most in 1918 with 23.
- 9 fixed thresholds have at least one qualifying day at US Magnetic Obsy.
Days at or above 30 C (86 F)
31 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1905 | 104 | 125.4 |
| 1906 | 166 | 125.4 |
| 1907 | 134 | 125.4 |
| 1908 | 100 | 125.4 |
| 1909 | 123 | 125.4 |
| 1910 | 83 | 135 |
| 1911 | 102 | 135 |
| 1912 | 143 | 135 |
| 1913 | 139 | 135 |
| 1914 | 141 | 135 |
| 1915 | 163 | 135 |
| 1916 | 112 | 135 |
| 1917 | 138 | 135 |
| 1918 | 161 | 135 |
| 1919 | 168 | 135 |
| 1920 | 119 | 131.5 |
| 1921 | 155 | 131.5 |
| 1922 | 148 | 131.5 |
| 1923 | 136 | 131.5 |
| 1924 | 112 | 131.5 |
| 1925 | 119 | 131.5 |
| 1950 | 104 | 123.4 |
| 1951 | 128 | 123.4 |
| 1952 | 110 | 123.4 |
| 1953 | 122 | 123.4 |
| 1954 | 168 | 123.4 |
| 1955 | 34 | 123.4 |
| 1956 | 117 | 123.4 |
| 1957 | 166 | 123.4 |
| 1958 | 129 | 123.4 |
| 1959 | 156 | 123.4 |
| Year | First date | Last date |
|---|---|---|
| 1905 | 1905-04-18 | 1905-11-09 |
| 1906 | 1906-04-18 | 1906-11-13 |
| 1907 | 1907-05-13 | 1907-11-16 |
| 1908 | 1908-05-07 | 1908-11-19 |
| 1909 | 1909-05-20 | 1909-11-18 |
| 1910 | 1910-05-26 | 1910-11-01 |
| 1911 | 1911-05-17 | 1911-11-26 |
| 1912 | 1912-05-08 | 1912-12-06 |
| 1913 | 1913-04-22 | 1913-11-21 |
| 1914 | 1914-04-30 | 1914-11-22 |
| 1915 | 1915-02-24 | 1915-11-25 |
| 1916 | 1916-04-12 | 1916-11-19 |
| 1917 | 1917-05-07 | 1917-11-11 |
| 1918 | 1918-05-08 | 1918-11-24 |
| 1919 | 1919-04-02 | 1919-12-11 |
| 1920 | 1920-03-17 | 1920-11-03 |
| 1921 | 1921-03-10 | 1921-12-11 |
| 1922 | 1922-03-29 | 1922-12-20 |
| 1923 | 1923-05-23 | 1923-12-02 |
| 1924 | 1924-05-17 | 1924-11-09 |
| 1925 | 1925-04-22 | 1925-12-09 |
| 1950 | 1950-03-28 | 1950-11-25 |
| 1951 | 1951-05-09 | 1951-11-03 |
| 1952 | 1952-03-30 | 1952-11-24 |
| 1953 | 1953-02-16 | 1953-11-26 |
| 1954 | 1954-04-12 | 1954-12-15 |
| 1955 | 1955-07-05 | 1955-11-25 |
| 1956 | 1956-05-01 | 1956-11-11 |
| 1957 | 1957-04-19 | 1957-11-19 |
| 1958 | 1958-05-02 | 1958-11-14 |
| 1959 | 1959-03-06 | 1959-11-15 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 31 | 168 | 1919 | 156 |
| 90 F (32.2 C): Days | 27 | 38 | 1915 | 13 |
| 20 C (68 F): Tropical nights (min | 31 | 198 | 1906 | 161 |
| 25 C (77 F): Days with min | 6 | 2 | 1914 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 23 | 23 | 1918 | 6 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 23 | 14 | 1951 | 4 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 20 | 6 | 1917 | 2 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 10 | 3 | 1917 | 1 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 3 | 1 | 1920 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1905.
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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.
Data as of . Last revised (2025-12-31).