Walkamin Post Office Threshold Days by Year
5 fixed thresholds counted per year at Walkamin Post Office (ASN00031061): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Walkamin Post Office Thresholds
- Walkamin Post Office: days with 10 mm (0.39 in) or more of precipitation in 20 years, most in 1974 with 54.
- Walkamin Post Office: days with 25 mm (0.98 in) or more of precipitation in 20 years, most in 1974 with 27.
- Walkamin Post Office: days with 50 mm (1.97 in) or more of precipitation in 20 years, most in 1974 with 10.
- Walkamin Post Office: days with 100 mm (3.94 in) or more of precipitation in 7 years, most in 1967 with 3.
- 5 fixed thresholds have at least one qualifying day at Walkamin Post Office.
Days with 10 mm (0.39 in) or more of precipitation
20 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1951 | 20 | 27.7 |
| 1952 | 23 | 27.7 |
| 1953 | 31 | 27.7 |
| 1954 | 20 | 27.7 |
| 1955 | 37 | 27.7 |
| 1956 | 39 | 27.7 |
| 1957 | 26 | 27.7 |
| 1958 | 35 | 27.7 |
| 1959 | 18 | 27.7 |
| 1960 | 22 | 19.8 |
| 1961 | 14 | 19.8 |
| 1966 | 17 | 19.8 |
| 1967 | 24 | 19.8 |
| 1968 | 22 | 19.8 |
| 1970 | 30 | 34.5 |
| 1971 | 29 | 34.5 |
| 1973 | 30 | 34.5 |
| 1974 | 54 | 34.5 |
| 1976 | 30 | 34.5 |
| 1977 | 34 | 34.5 |
| Year | First date | Last date |
|---|---|---|
| 1951 | 1951-01-03 | 1951-12-27 |
| 1952 | 1952-01-12 | 1952-12-12 |
| 1953 | 1953-01-04 | 1953-12-29 |
| 1954 | 1954-01-04 | 1954-11-04 |
| 1955 | 1955-01-06 | 1955-12-31 |
| 1956 | 1956-01-04 | 1956-12-27 |
| 1957 | 1957-01-01 | 1957-12-14 |
| 1958 | 1958-01-06 | 1958-12-30 |
| 1959 | 1959-02-12 | 1959-12-29 |
| 1960 | 1960-01-16 | 1960-12-30 |
| 1961 | 1961-01-04 | 1961-11-26 |
| 1966 | 1966-01-04 | 1966-11-14 |
| 1967 | 1967-01-02 | 1967-12-25 |
| 1968 | 1968-01-03 | 1968-12-29 |
| 1970 | 1970-01-19 | 1970-12-26 |
| 1971 | 1971-01-06 | 1971-12-29 |
| 1973 | 1973-01-27 | 1973-12-29 |
| 1974 | 1974-01-03 | 1974-12-31 |
| 1976 | 1976-01-14 | 1976-12-25 |
| 1977 | 1977-01-17 | 1977-12-23 |
Every Fixed Threshold
| 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 | 20 | 54 | 1974 | 34 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 20 | 27 | 1974 | 13 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 20 | 10 | 1974 | 7 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 7 | 3 | 1967 | 2 |
| 200 mm (7.87 in): Days with 200 mm or more rain | 1 | 1 | 1977 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1951.
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 (2025-12-31).