Rialto Threshold Days by Year (BR002244043)
3 fixed thresholds counted per year at Rialto (BR002244043): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Rialto Thresholds
- Rialto: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 1965 with 56.
- Rialto: days with 25 mm (0.98 in) or more of precipitation in 26 years, most in 1966 with 25.
- Rialto: days with 50 mm (1.97 in) or more of precipitation in 26 years, most in 1967 with 7.
- 3 fixed thresholds have at least one qualifying day at Rialto.
Days with 10 mm (0.39 in) or more of precipitation
26 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1952 | 45 | 42.3 |
| 1953 | 34 | 42.3 |
| 1954 | 48 | 42.3 |
| 1956 | 41 | 42.3 |
| 1957 | 42 | 42.3 |
| 1958 | 45 | 42.3 |
| 1959 | 41 | 42.3 |
| 1960 | 27 | 43.4 |
| 1961 | 55 | 43.4 |
| 1962 | 50 | 43.4 |
| 1963 | 28 | 43.4 |
| 1964 | 46 | 43.4 |
| 1965 | 56 | 43.4 |
| 1966 | 48 | 43.4 |
| 1967 | 49 | 43.4 |
| 1968 | 30 | 43.4 |
| 1969 | 45 | 43.4 |
| 1970 | 44 | 45 |
| 1971 | 38 | 45 |
| 1972 | 50 | 45 |
| 1973 | 44 | 45 |
| 1974 | 41 | 45 |
| 1975 | 48 | 45 |
| 1976 | 52 | 45 |
| 1977 | 43 | 45 |
| 1982 | 52 | 52 |
| Year | First date | Last date |
|---|---|---|
| 1952 | 1952-01-02 | 1952-12-19 |
| 1953 | 1953-01-01 | 1953-12-18 |
| 1954 | 1954-01-01 | 1954-12-28 |
| 1956 | 1956-01-02 | 1956-12-28 |
| 1957 | 1957-01-10 | 1957-12-28 |
| 1958 | 1958-01-18 | 1958-12-22 |
| 1959 | 1959-01-06 | 1959-12-23 |
| 1960 | 1960-01-12 | 1960-12-30 |
| 1961 | 1961-01-01 | 1961-12-30 |
| 1962 | 1962-01-04 | 1962-12-31 |
| 1963 | 1963-01-16 | 1963-12-20 |
| 1964 | 1964-01-03 | 1964-12-30 |
| 1965 | 1965-01-09 | 1965-12-31 |
| 1966 | 1966-01-10 | 1966-12-31 |
| 1967 | 1967-01-06 | 1967-12-29 |
| 1968 | 1968-01-04 | 1968-12-17 |
| 1969 | 1969-01-03 | 1969-12-25 |
| 1970 | 1970-01-05 | 1970-12-21 |
| 1971 | 1971-01-02 | 1971-12-26 |
| 1972 | 1972-01-06 | 1972-12-29 |
| 1973 | 1973-01-02 | 1973-12-26 |
| 1974 | 1974-01-12 | 1974-12-26 |
| 1975 | 1975-01-02 | 1975-12-26 |
| 1976 | 1976-01-04 | 1976-12-29 |
| 1977 | 1977-01-02 | 1977-12-22 |
| 1982 | 1982-01-02 | 1982-12-30 |
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 | 26 | 56 | 1965 | 52 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 26 | 25 | 1966 | 21 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 26 | 7 | 1967 | 4 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1952.
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).