Atotonilco Threshold Days by Year (MXN00010001)
12 fixed thresholds counted per year at Atotonilco (MXN00010001): hot days, frost, tropical nights and heavy rain, with the most days in a year.
Key Facts for Atotonilco Thresholds
- Atotonilco: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 1981 with 237.
- Atotonilco: nights with a minimum temperature at or below 0 C (32 F) in 28 years, most in 2006 with 50.
- Atotonilco: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 1976 with 24.
- Atotonilco: days with a maximum temperature at or above 90 F (32.2 C) in 24 years, most in 1982 with 164.
- 12 fixed thresholds have at least one qualifying day at Atotonilco.
Days at or above 30 C (86 F)
28 years with a qualifying day| Year | Days | Decade average |
|---|---|---|
| 1971 | 43 | 61.1 |
| 1972 | 131 | 61.1 |
| 1974 | 55 | 61.1 |
| 1975 | 59 | 61.1 |
| 1976 | 26 | 61.1 |
| 1977 | 28 | 61.1 |
| 1978 | 73 | 61.1 |
| 1979 | 74 | 61.1 |
| 1980 | 155 | 206.3 |
| 1981 | 237 | 206.3 |
| 1982 | 230 | 206.3 |
| 1983 | 197 | 206.3 |
| 1984 | 220 | 206.3 |
| 1985 | 199 | 206.3 |
| 1993 | 31 | 43 |
| 1994 | 45 | 43 |
| 1995 | 32 | 43 |
| 1997 | 29 | 43 |
| 1998 | 64 | 43 |
| 1999 | 57 | 43 |
| 2000 | 75 | 58 |
| 2001 | 91 | 58 |
| 2002 | 58 | 58 |
| 2003 | 39 | 58 |
| 2004 | 38 | 58 |
| 2005 | 76 | 58 |
| 2006 | 44 | 58 |
| 2007 | 43 | 58 |
| Year | First date | Last date |
|---|---|---|
| 1971 | 1971-04-21 | 1971-07-24 |
| 1972 | 1972-04-04 | 1972-12-01 |
| 1974 | 1974-03-27 | 1974-08-05 |
| 1975 | 1975-03-22 | 1975-08-02 |
| 1976 | 1976-04-22 | 1976-06-26 |
| 1977 | 1977-05-01 | 1977-11-01 |
| 1978 | 1978-01-30 | 1978-08-20 |
| 1979 | 1979-03-29 | 1979-10-21 |
| 1980 | 1980-03-09 | 1980-12-27 |
| 1981 | 1981-02-05 | 1981-12-31 |
| 1982 | 1982-01-02 | 1982-11-23 |
| 1983 | 1983-01-31 | 1983-11-30 |
| 1984 | 1984-02-17 | 1984-12-22 |
| 1985 | 1985-03-01 | 1985-12-09 |
| 1993 | 1993-05-03 | 1993-07-31 |
| 1994 | 1994-04-22 | 1994-09-22 |
| 1995 | 1995-05-07 | 1995-06-29 |
| 1997 | 1997-05-06 | 1997-08-03 |
| 1998 | 1998-04-03 | 1998-09-23 |
| 1999 | 1999-04-09 | 1999-08-06 |
| 2000 | 2000-04-17 | 2000-08-25 |
| 2001 | 2001-04-16 | 2001-09-23 |
| 2002 | 2002-04-20 | 2002-09-01 |
| 2003 | 2003-04-19 | 2003-06-28 |
| 2004 | 2004-04-24 | 2004-07-29 |
| 2005 | 2005-05-03 | 2005-07-26 |
| 2006 | 2006-04-04 | 2006-06-20 |
| 2007 | 2007-04-22 | 2007-06-10 |
Every Fixed Threshold
| Threshold | Years with a qualifying day | Most days in a year | Year | Latest year days |
|---|---|---|---|---|
| 30 C (86 F): Days | 28 | 237 | 1981 | 43 |
| 35 C (95 F): Days | 11 | 85 | 1981 | 1 |
| 40 C (104 F): Days | 4 | 3 | 1982 | 3 |
| 90 F (32.2 C): Days | 24 | 164 | 1982 | 5 |
| 100 F (37.8 C): Days | 7 | 18 | 1982 | 17 |
| 0 C (32 F): Ice days (max | 1 | 1 | 1997 | 1 |
| 0 C (32 F): Frost days (min | 28 | 50 | 2006 | 32 |
| -10 C (14 F): Days with min | 2 | 3 | 1997 | 1 |
| 20 C (68 F): Tropical nights (min | 8 | 34 | 1980 | 1 |
| 10 mm (0.39 in): Days with 10 mm or more rain | 26 | 24 | 1976 | 6 |
| 25 mm (0.98 in): Days with 25 mm or more rain | 23 | 7 | 1993 | 2 |
| 50 mm (1.97 in): Days with 50 mm or more rain | 6 | 3 | 1993 | 1 |
Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1971.
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).