Ketchikan AP Threshold Days by Year (USW00025325)
15 fixed thresholds counted per year at Ketchikan AP (USW00025325): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Ketchikan AP Thresholds
- Ketchikan AP: nights with a minimum temperature at or below 0 C (32 F) in 105 years, most in 1920 with 148.
- Ketchikan AP: days with a maximum temperature at or below 0 C (32 F) in 103 years, most in 1916 with 37.
- Ketchikan AP: days with 10 mm (0.39 in) or more of precipitation in 103 years, most in 1999 with 146.
- Ketchikan AP: days with 25 mm (0.98 in) or more of precipitation in 103 years, most in 1970 with 71.
- 15 fixed thresholds have at least one qualifying day at Ketchikan AP.
Days at or above 30 C (86 F)
20 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1913 | 3 | 2 |
| 1914 | 1 | 2 |
| 1915 | 2 | 2 |
| 1923 | 1 | 1 |
| 1927 | 1 | 1 |
| 1934 | 2 | 1.5 |
| 1937 | 1 | 1.5 |
| 1941 | 1 | 1.3 |
| 1942 | 1 | 1.3 |
| 1944 | 1 | 1.3 |
| 1948 | 2 | 1.3 |
| 1950 | 3 | 2 |
| 1952 | 1 | 2 |
| 1957 | 1 | 2 |
| 1958 | 3 | 2 |
| 1963 | 2 | 2 |
| 1971 | 1 | 2.5 |
| 1975 | 1 | 2.5 |
| 1976 | 1 | 2.5 |
| 1977 | 7 | 2.5 |
| Year | First date | Last date |
|---|---|---|
| 1913 | 1913-06-25 | 1913-07-13 |
| 1914 | 1914-05-23 | 1914-05-23 |
| 1915 | 1915-07-26 | 1915-07-27 |
| 1923 | 1923-07-07 | 1923-07-07 |
| 1927 | 1927-07-31 | 1927-07-31 |
| 1934 | 1934-07-25 | 1934-07-26 |
| 1937 | 1937-06-10 | 1937-06-10 |
| 1941 | 1941-07-15 | 1941-07-15 |
| 1942 | 1942-08-07 | 1942-08-07 |
| 1944 | 1944-06-16 | 1944-06-16 |
| 1948 | 1948-06-10 | 1948-06-11 |
| 1950 | 1950-06-17 | 1950-08-18 |
| 1952 | 1952-07-12 | 1952-07-12 |
| 1957 | 1957-08-16 | 1957-08-16 |
| 1958 | 1958-06-06 | 1958-06-20 |
| 1963 | 1963-05-21 | 1963-05-22 |
| 1971 | 1971-07-27 | 1971-07-27 |
| 1975 | 1975-07-08 | 1975-07-08 |
| 1976 | 1976-07-30 | 1976-07-30 |
| 1977 | 1977-08-04 | 1977-08-19 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 20 | 7 | 1977 | 7 |
| 35 C (95 F): Days | 1 | 1 | 1913 | 1 |
| 90 F (32.2 C): Days | 3 | 1 | 1913 | 1 |
| 0 C (32 F): Ice days (max | 103 | 37 | 1916 | 3 |
| 0 C (32 F): Frost days (min | 105 | 148 | 1920 | 57 |
| -10 C (14 F): Days with min | 86 | 26 | 1916 | 5 |
| -20 C (-4 F): Days with min | 4 | 2 | 1916 | 1 |
| 20 C (68 F): Tropical nights (min | 1 | 1 | 2009 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 103 | 146 | 1999 | 56 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 103 | 71 | 1970 | 27 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 103 | 28 | 2005 | 9 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 84 | 5 | 1920 | 1 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 3 | 1 | 1920 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 31 | 8 | 1933 | 1 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 6 | 2 | 1976 | 2 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1913.
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 (2026-10-12).