San Juan del Rio Threshold Days by Year (MXN00010068)
14 fixed thresholds counted per year at San Juan del Rio (MXN00010068): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for San Juan del Rio Thresholds
- San Juan del Rio: days with 10 mm (0.39 in) or more of precipitation in 58 years, most in 1941 with 27.
- San Juan del Rio: days with a maximum temperature at or above 30 C (86 F) in 55 years, most in 1948 with 347.
- San Juan del Rio: days with a maximum temperature at or above 35 C (95 F) in 55 years, most in 1946 with 251.
- San Juan del Rio: days with a maximum temperature at or above 90 F (32.2 C) in 55 years, most in 1948 with 302.
- 14 fixed thresholds have at least one qualifying day at San Juan del Rio.
Days at or above 30 C (86 F)
55 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1939 | 179 | 179 |
| 1940 | 163 | 228.6 |
| 1941 | 193 | 228.6 |
| 1942 | 208 | 228.6 |
| 1943 | 200 | 228.6 |
| 1944 | 269 | 228.6 |
| 1946 | 311 | 228.6 |
| 1948 | 347 | 228.6 |
| 1949 | 138 | 228.6 |
| 1950 | 111 | 161.6 |
| 1951 | 123 | 161.6 |
| 1952 | 132 | 161.6 |
| 1953 | 243 | 161.6 |
| 1954 | 312 | 161.6 |
| 1955 | 134 | 161.6 |
| 1956 | 180 | 161.6 |
| 1957 | 153 | 161.6 |
| 1958 | 75 | 161.6 |
| 1959 | 153 | 161.6 |
| 1960 | 195 | 207.8 |
| 1961 | 246 | 207.8 |
| 1962 | 225 | 207.8 |
| 1963 | 206 | 207.8 |
| 1964 | 184 | 207.8 |
| 1965 | 203 | 207.8 |
| 1966 | 206 | 207.8 |
| 1967 | 226 | 207.8 |
| 1968 | 191 | 207.8 |
| 1969 | 196 | 207.8 |
| 1970 | 185 | 172.8 |
| 1972 | 191 | 172.8 |
| 1973 | 139 | 172.8 |
| 1974 | 178 | 172.8 |
| 1975 | 182 | 172.8 |
| 1976 | 188 | 172.8 |
| 1977 | 185 | 172.8 |
| 1978 | 158 | 172.8 |
| 1979 | 149 | 172.8 |
| 1980 | 150 | 131.4 |
| 1981 | 137 | 131.4 |
| 1982 | 180 | 131.4 |
| 1983 | 133 | 131.4 |
| 1984 | 96 | 131.4 |
| 1985 | 140 | 131.4 |
| 1986 | 149 | 131.4 |
| 1987 | 111 | 131.4 |
| 1988 | 99 | 131.4 |
| 1989 | 119 | 131.4 |
| 1990 | 85 | 112.3 |
| 1991 | 88 | 112.3 |
| 1992 | 109 | 112.3 |
| 1997 | 167 | 112.3 |
| 2003 | 172 | 162.7 |
| 2004 | 126 | 162.7 |
| 2006 | 190 | 162.7 |
| Year | First date | Last date |
|---|---|---|
| 1939 | 1939-03-13 | 1939-10-10 |
| 1940 | 1940-03-04 | 1940-11-05 |
| 1941 | 1941-02-15 | 1941-10-16 |
| 1942 | 1942-02-20 | 1942-11-09 |
| 1943 | 1943-02-19 | 1943-10-22 |
| 1944 | 1944-02-05 | 1944-12-28 |
| 1946 | 1946-01-01 | 1946-12-28 |
| 1948 | 1948-01-01 | 1948-12-27 |
| 1949 | 1949-01-06 | 1949-10-23 |
| 1950 | 1950-03-09 | 1950-09-30 |
| 1951 | 1951-02-25 | 1951-10-07 |
| 1952 | 1952-02-29 | 1952-10-14 |
| 1953 | 1953-02-03 | 1953-12-18 |
| 1954 | 1954-01-01 | 1954-12-08 |
| 1955 | 1955-01-25 | 1955-09-28 |
| 1956 | 1956-02-24 | 1956-09-30 |
| 1957 | 1957-01-10 | 1957-10-07 |
| 1958 | 1958-04-05 | 1958-08-09 |
| 1959 | 1959-03-07 | 1959-09-25 |
| 1960 | 1960-03-08 | 1960-11-27 |
| 1961 | 1961-03-02 | 1961-12-06 |
| 1962 | 1962-02-07 | 1962-11-26 |
| 1963 | 1963-02-02 | 1963-10-14 |
| 1964 | 1964-03-25 | 1964-10-18 |
| 1965 | 1965-03-21 | 1965-11-25 |
| 1966 | 1966-03-20 | 1966-10-25 |
| 1967 | 1967-03-05 | 1967-11-27 |
| 1968 | 1968-03-28 | 1968-11-30 |
| 1969 | 1969-03-25 | 1969-11-03 |
| 1970 | 1970-03-16 | 1970-11-10 |
| 1972 | 1972-03-21 | 1972-10-17 |
| 1973 | 1973-03-26 | 1973-10-12 |
| 1974 | 1974-03-06 | 1974-11-04 |
| 1975 | 1975-03-09 | 1975-10-20 |
| 1976 | 1976-03-09 | 1976-10-15 |
| 1977 | 1977-03-24 | 1977-11-10 |
| 1978 | 1978-03-12 | 1978-11-23 |
| 1979 | 1979-03-15 | 1979-10-19 |
| 1980 | 1980-03-05 | 1980-10-14 |
| 1981 | 1981-03-27 | 1981-10-17 |
| 1982 | 1982-03-11 | 1982-10-30 |
| 1983 | 1983-03-23 | 1983-10-08 |
| 1984 | 1984-03-17 | 1984-09-28 |
| 1985 | 1985-03-06 | 1985-11-15 |
| 1986 | 1986-02-20 | 1986-10-10 |
| 1987 | 1987-03-23 | 1987-10-19 |
| 1988 | 1988-03-25 | 1988-11-14 |
| 1989 | 1989-03-17 | 1989-10-05 |
| 1990 | 1990-03-22 | 1990-07-18 |
| 1991 | 1991-03-08 | 1991-08-14 |
| 1992 | 1992-04-17 | 1992-09-10 |
| 1997 | 1997-01-05 | 1997-09-30 |
| 2003 | 2003-03-04 | 2003-12-15 |
| 2004 | 2004-05-03 | 2004-11-27 |
| 2006 | 2006-01-01 | 2006-12-30 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 55 | 347 | 1948 | 190 |
| 35 C (95 F): Days | 55 | 251 | 1946 | 119 |
| 40 C (104 F): Days | 20 | 179 | 1946 | 60 |
| 45 C (113 F): Days | 5 | 31 | 1946 | 1 |
| 90 F (32.2 C): Days | 55 | 302 | 1948 | 125 |
| 100 F (37.8 C): Days | 43 | 213 | 1946 | 90 |
| 110 F (43.3 C): Days | 9 | 75 | 1946 | 3 |
| 120 F (48.9 C): Days | 1 | 1 | 2006 | 1 |
| 0 C (32 F): Frost days (min | 48 | 32 | 1953 | 1 |
| 20 C (68 F): Tropical nights (min | 11 | 65 | 2004 | 36 |
| 25 C (77 F): Days with min | 2 | 7 | 2004 | 7 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 58 | 27 | 1941 | 14 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 55 | 10 | 1970 | 3 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 20 | 2 | 1943 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.
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).