San Juan del Rio (Smn) Threshold Days by Year
9 fixed thresholds counted per year at San Juan del Rio (Smn) (MXN00022015): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for San Juan del Rio (Smn) Thresholds
- San Juan del Rio (Smn): days with 10 mm (0.39 in) or more of precipitation in 33 years, most in 1927 with 41.
- San Juan del Rio (Smn): days with 25 mm (0.98 in) or more of precipitation in 33 years, most in 1927 with 26.
- San Juan del Rio (Smn): nights with a minimum temperature at or below 0 C (32 F) in 29 years, most in 1938 with 37.
- San Juan del Rio (Smn): days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 1980 with 76.
- 9 fixed thresholds have at least one qualifying day at San Juan del Rio (Smn).
Days at or above 30 C (86 F)
28 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1922 | 3 | 27.8 |
| 1925 | 17 | 27.8 |
| 1926 | 9 | 27.8 |
| 1927 | 51 | 27.8 |
| 1928 | 41 | 27.8 |
| 1929 | 46 | 27.8 |
| 1930 | 33 | 23 |
| 1937 | 9 | 23 |
| 1938 | 27 | 23 |
| 1961 | 21 | 15.3 |
| 1962 | 18 | 15.3 |
| 1963 | 12 | 15.3 |
| 1964 | 18 | 15.3 |
| 1965 | 12 | 15.3 |
| 1966 | 5 | 15.3 |
| 1967 | 10 | 15.3 |
| 1969 | 26 | 15.3 |
| 1970 | 29 | 21.1 |
| 1971 | 21 | 21.1 |
| 1972 | 6 | 21.1 |
| 1973 | 37 | 21.1 |
| 1974 | 14 | 21.1 |
| 1975 | 20 | 21.1 |
| 1976 | 9 | 21.1 |
| 1977 | 14 | 21.1 |
| 1978 | 26 | 21.1 |
| 1979 | 35 | 21.1 |
| 1980 | 76 | 76 |
| Year | First date | Last date |
|---|---|---|
| 1922 | 1922-04-17 | 1922-05-20 |
| 1925 | 1925-04-08 | 1925-06-02 |
| 1926 | 1926-04-04 | 1926-06-17 |
| 1927 | 1927-03-27 | 1927-08-02 |
| 1928 | 1928-03-04 | 1928-07-22 |
| 1929 | 1929-02-21 | 1929-06-17 |
| 1930 | 1930-03-09 | 1930-09-24 |
| 1937 | 1937-05-01 | 1937-11-14 |
| 1938 | 1938-03-27 | 1938-10-26 |
| 1961 | 1961-03-07 | 1961-05-21 |
| 1962 | 1962-02-25 | 1962-06-08 |
| 1963 | 1963-04-09 | 1963-06-05 |
| 1964 | 1964-03-22 | 1964-05-09 |
| 1965 | 1965-03-11 | 1965-06-14 |
| 1966 | 1966-04-21 | 1966-06-09 |
| 1967 | 1967-04-22 | 1967-07-27 |
| 1969 | 1969-04-15 | 1969-06-19 |
| 1970 | 1970-03-20 | 1970-06-12 |
| 1971 | 1971-03-01 | 1971-06-10 |
| 1972 | 1972-04-07 | 1972-05-24 |
| 1973 | 1973-03-04 | 1973-06-04 |
| 1974 | 1974-03-21 | 1974-05-16 |
| 1975 | 1975-03-12 | 1975-05-09 |
| 1976 | 1976-03-27 | 1976-05-26 |
| 1977 | 1977-03-05 | 1977-05-07 |
| 1978 | 1978-03-13 | 1978-05-18 |
| 1979 | 1979-03-23 | 1979-10-27 |
| 1980 | 1980-03-06 | 1980-10-18 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 28 | 76 | 1980 | 76 |
| 35 C (95 F): Days | 4 | 2 | 1974 | 2 |
| 90 F (32.2 C): Days | 17 | 18 | 1927 | 18 |
| 0 C (32 F): Frost days (min | 29 | 37 | 1938 | 4 |
| 20 C (68 F): Tropical nights (min | 1 | 2 | 1938 | 2 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 33 | 41 | 1927 | 13 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 33 | 26 | 1927 | 4 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 14 | 14 | 1927 | 1 |
| 100 mm (3.94 in): Days with 100 mm or more rain | 1 | 6 | 1927 | 6 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1922.
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).