Waterloo 2 NW Threshold Days by Year
16 fixed thresholds counted per year at Waterloo 2 NW (USC00129271): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Waterloo 2 NW Thresholds
- Waterloo 2 NW: days with 10 mm (0.39 in) or more of precipitation in 48 years, most in 1942 with 48.
- Waterloo 2 NW: days with 25 mm (0.98 in) or more of precipitation in 48 years, most in 1981 with 15.
- Waterloo 2 NW: days with a maximum temperature at or above 30 C (86 F) in 41 years, most in 1941 with 69.
- Waterloo 2 NW: days with a maximum temperature at or below 0 C (32 F) in 41 years, most in 1977 with 63.
- 16 fixed thresholds have at least one qualifying day at Waterloo 2 NW.
Days at or above 30 C (86 F)
41 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1941 | 69 | 39.8 |
| 1942 | 33 | 39.8 |
| 1943 | 34 | 39.8 |
| 1944 | 52 | 39.8 |
| 1945 | 22 | 39.8 |
| 1946 | 34 | 39.8 |
| 1947 | 37 | 39.8 |
| 1949 | 37 | 39.8 |
| 1950 | 18 | 39.4 |
| 1951 | 12 | 39.4 |
| 1952 | 61 | 39.4 |
| 1953 | 63 | 39.4 |
| 1954 | 46 | 39.4 |
| 1955 | 59 | 39.4 |
| 1956 | 33 | 39.4 |
| 1957 | 29 | 39.4 |
| 1958 | 12 | 39.4 |
| 1959 | 61 | 39.4 |
| 1960 | 29 | 35.8 |
| 1961 | 36 | 35.8 |
| 1962 | 37 | 35.8 |
| 1963 | 30 | 35.8 |
| 1964 | 51 | 35.8 |
| 1965 | 20 | 35.8 |
| 1966 | 46 | 35.8 |
| 1967 | 25 | 35.8 |
| 1968 | 40 | 35.8 |
| 1969 | 44 | 35.8 |
| 1970 | 49 | 39.3 |
| 1971 | 43 | 39.3 |
| 1972 | 35 | 39.3 |
| 1973 | 36 | 39.3 |
| 1974 | 34 | 39.3 |
| 1975 | 46 | 39.3 |
| 1976 | 36 | 39.3 |
| 1977 | 47 | 39.3 |
| 1978 | 44 | 39.3 |
| 1979 | 23 | 39.3 |
| 1980 | 36 | 27 |
| 1981 | 21 | 27 |
| 1982 | 24 | 27 |
| Year | First date | Last date |
|---|---|---|
| 1941 | 1941-05-21 | 1941-09-25 |
| 1942 | 1942-04-30 | 1942-09-14 |
| 1943 | 1943-06-12 | 1943-09-01 |
| 1944 | 1944-05-26 | 1944-09-03 |
| 1945 | 1945-06-14 | 1945-09-23 |
| 1946 | 1946-06-11 | 1946-09-27 |
| 1947 | 1947-06-10 | 1947-09-12 |
| 1949 | 1949-05-05 | 1949-08-28 |
| 1950 | 1950-05-25 | 1950-10-01 |
| 1951 | 1951-05-19 | 1951-10-04 |
| 1952 | 1952-05-05 | 1952-09-14 |
| 1953 | 1953-05-30 | 1953-10-03 |
| 1954 | 1954-05-24 | 1954-09-06 |
| 1955 | 1955-05-03 | 1955-09-19 |
| 1956 | 1956-05-13 | 1956-09-04 |
| 1957 | 1957-06-16 | 1957-09-01 |
| 1958 | 1958-07-01 | 1958-09-05 |
| 1959 | 1959-05-02 | 1959-09-28 |
| 1960 | 1960-06-04 | 1960-09-08 |
| 1961 | 1961-06-06 | 1961-09-13 |
| 1962 | 1962-05-14 | 1962-09-13 |
| 1963 | 1963-05-09 | 1963-10-07 |
| 1964 | 1964-05-19 | 1964-09-21 |
| 1965 | 1965-06-08 | 1965-09-19 |
| 1966 | 1966-05-27 | 1966-09-03 |
| 1967 | 1967-05-27 | 1967-09-16 |
| 1968 | 1968-06-06 | 1968-09-23 |
| 1969 | 1969-05-16 | 1969-09-06 |
| 1970 | 1970-05-21 | 1970-09-21 |
| 1971 | 1971-05-18 | 1971-10-02 |
| 1972 | 1972-05-21 | 1972-09-17 |
| 1973 | 1973-06-09 | 1973-09-27 |
| 1974 | 1974-06-20 | 1974-08-27 |
| 1975 | 1975-05-19 | 1975-08-25 |
| 1976 | 1976-06-07 | 1976-09-14 |
| 1977 | 1977-05-16 | 1977-09-01 |
| 1978 | 1978-05-27 | 1978-09-20 |
| 1979 | 1979-05-08 | 1979-08-31 |
| 1980 | 1980-05-29 | 1980-09-22 |
| 1981 | 1981-06-08 | 1981-08-31 |
| 1982 | 1982-05-13 | 1982-10-01 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 41 | 69 | 1941 | 24 |
| 35 C (95 F): Days | 22 | 15 | 1953 | 3 |
| 90 F (32.2 C): Days | 40 | 40 | 1953 | 3 |
| 100 F (37.8 C): Days | 3 | 3 | 1953 | 1 |
| 0 C (32 F): Ice days (max | 41 | 63 | 1977 | 34 |
| 0 C (32 F): Frost days (min | 41 | 160 | 1962 | 133 |
| -10 C (14 F): Days with min | 41 | 58 | 1963 | 43 |
| -20 C (-4 F): Days with min | 36 | 22 | 1963 | 11 |
| 20 C (68 F): Tropical nights (min | 40 | 25 | 1949 | 11 |
| 25 C (77 F): Days with min | 4 | 2 | 1980 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 48 | 48 | 1942 | 28 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 48 | 15 | 1981 | 3 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 30 | 5 | 1943 | 2 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 3 | 1 | 1972 | 1 |
| 10 cm (3.9 in): Days with 10 cm or more snowfall | 35 | 6 | 1977 | 2 |
| 25 cm (9.8 in): Days with 25 cm or more snowfall | 4 | 1 | 1957 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1941.
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).