Chisos Basin Weather Records (USC00411715)
Record envelope, standing records and threshold days for Chisos Basin (USC00411715), Texas, United States, with 84 years of record.
Key Facts for Chisos Basin
- Chisos Basin (USC00411715) is a weather station in Texas, United States at 29.27 latitude and -103.30 longitude, 1,615 m (5,300 ft) above sea level.
- The station reports from 1943 to 2026, 84 years of record.
- 1,464 records set at Chisos Basin still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Chisos Basin set a daily record high minimum temperature of 21.1 C (70.0 F) on 16 September 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Texas, United States, 29.27 latitude, -103.30 longitude.
- Elevation: 1,615 m (5,300 ft).
- Period of record: 1943 to 2026, 84 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
15 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 27.8 C (82.0 F) | -19.4 C (-2.9 F) | 23.3 C (73.9 F) | -3.9 C (25.0 F) |
| Feb | 28.9 C (84.0 F) | -17.2 C (1.0 F) | 26.7 C (80.1 F) | 0.6 C (33.1 F) |
| Mar | 35.6 C (96.1 F) | -11.1 C (12.0 F) | 31.7 C (89.1 F) | -1.7 C (28.9 F) |
| Apr | 35.6 C (96.1 F) | -3.9 C (25.0 F) | 31.7 C (89.1 F) | 3.9 C (39.0 F) |
| May | 37.2 C (99.0 F) | -1.1 C (30.0 F) | 32.2 C (90.0 F) | 7.8 C (46.0 F) |
| Jun | 39.4 C (102.9 F) | 7.2 C (45.0 F) | 35.0 C (95.0 F) | 15.6 C (60.1 F) |
| Jul | 38.9 C (102.0 F) | 11.7 C (53.1 F) | 33.3 C (91.9 F) | 16.1 C (61.0 F) |
| Aug | 37.8 C (100.0 F) | 11.1 C (52.0 F) | 32.2 C (90.0 F) | 15.6 C (60.1 F) |
| Sep | 36.1 C (97.0 F) | 1.1 C (34.0 F) | 32.2 C (90.0 F) | 16.7 C (62.1 F) |
| Oct | 34.4 C (93.9 F) | -7.2 C (19.0 F) | 28.3 C (82.9 F) | 12.8 C (55.0 F) |
| Nov | 31.7 C (89.1 F) | -10.6 C (12.9 F) | n/a | n/a |
| Dec | 30.6 C (87.1 F) | -15.6 C (3.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1947 | 7 |
| 1948 | 28 |
| 1949 | 17 |
| 1950 | 18 |
| 1951 | 32 |
| 1952 | 25 |
| 1953 | 22 |
| 1954 | 12 |
| 1955 | 16 |
| 1956 | 15 |
| 1957 | 47 |
| 1958 | 19 |
| 1959 | 26 |
| 1960 | 18 |
| 1961 | 23 |
| 1962 | 23 |
| 1963 | 18 |
| 1964 | 10 |
| 1965 | 23 |
| 1966 | 9 |
| 1967 | 20 |
| 1968 | 15 |
| 1969 | 12 |
| 1970 | 26 |
| 1971 | 31 |
| 1972 | 26 |
| 1973 | 26 |
| 1974 | 12 |
| 1975 | 16 |
| 1976 | 24 |
| 1977 | 16 |
| 1978 | 10 |
| 1979 | 16 |
| 1980 | 31 |
| 1981 | 8 |
| 1982 | 18 |
| 1983 | 15 |
| 1984 | 14 |
| 1985 | 13 |
| 1986 | 13 |
| 1987 | 22 |
| 1988 | 10 |
| 1989 | 29 |
| 1990 | 12 |
| 1991 | 5 |
| 1992 | 20 |
| 1993 | 7 |
| 1994 | 12 |
| 1995 | 11 |
| 1996 | 33 |
| 1997 | 12 |
| 1998 | 11 |
| 1999 | 15 |
| 2000 | 17 |
| 2001 | 16 |
| 2002 | 18 |
| 2003 | 18 |
| 2004 | 17 |
| 2005 | 11 |
| 2006 | 6 |
| 2007 | 10 |
| 2008 | 10 |
| 2009 | 17 |
| 2010 | 15 |
| 2011 | 32 |
| 2012 | 14 |
| 2013 | 9 |
| 2014 | 11 |
| 2015 | 14 |
| 2016 | 16 |
| 2017 | 17 |
| 2018 | 18 |
| 2019 | 21 |
| 2020 | 34 |
| 2021 | 29 |
| 2022 | 19 |
| 2023 | 43 |
| 2024 | 17 |
| 2025 | 24 |
| 2026 | 22 |
All-Time Record Progression
6 new records| Date | Kind | Detail |
|---|---|---|
| 1986-01-08 | Record daily snowfall | Record daily snowfall 30.5 cm (12.0 in) |
| 1989-12-23 | Record low maximum temperature | Record low maximum temperature -8.3 C (17.1 F) |
| 2011-02-03 | Record low maximum temperature | Record low maximum temperature -10.0 C (14.0 F) |
| 2011-02-04 | Record low maximum temperature | Record low maximum temperature -13.9 C (7.0 F) |
| 2020-12-31 | Record daily snowfall | Record daily snowfall 61.0 cm (24.0 in) |
| 2020-12-31 | Record snow depth | Record snow depth 50.8 cm (20.0 in) |
Wettest Day of Each Month
Oct: 109.0 mm (4.3 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 44.7 mm (1.8 in) | 8 January 1946 |
| Feb | 56.1 mm (2.2 in) | 4 February 1992 |
| Mar | 35.1 mm (1.4 in) | 23 March 1967 |
| Apr | 55.9 mm (2.2 in) | 15 April 2010 |
| May | 88.9 mm (3.5 in) | 19 May 1988 |
| Jun | 72.4 mm (2.9 in) | 16 June 1996 |
| Jul | 82.8 mm (3.3 in) | 18 July 1959 |
| Aug | 102.1 mm (4.0 in) | 26 August 1974 |
| Sep | 89.9 mm (3.5 in) | 18 September 1995 |
| Oct | 109.0 mm (4.3 in) | 5 October 1966 |
| Nov | 87.6 mm (3.4 in) | 5 November 2014 |
| Dec | 29.0 mm (1.1 in) | 22 December 1986 |
Period of Record Coverage
1947 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1947 | 166 | 45% | No |
| 1948 | 359 | 98% | Yes |
| 1949 | 361 | 99% | Yes |
| 1950 | 362 | 99% | Yes |
| 1951 | 358 | 98% | Yes |
| 1952 | 360 | 98% | Yes |
| 1953 | 348 | 95% | Yes |
| 1954 | 352 | 96% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 351 | 96% | Yes |
| 1958 | 362 | 99% | Yes |
| 1959 | 350 | 96% | Yes |
| 1960 | 363 | 99% | Yes |
| 1961 | 360 | 99% | Yes |
| 1962 | 357 | 98% | Yes |
| 1963 | 360 | 99% | Yes |
| 1964 | 363 | 99% | Yes |
| 1965 | 364 | 100% | Yes |
| 1966 | 359 | 98% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 365 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 364 | 100% | Yes |
| 1974 | 363 | 99% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 363 | 99% | Yes |
| 1981 | 362 | 99% | Yes |
| 1982 | 361 | 99% | Yes |
| 1983 | 362 | 99% | Yes |
| 1984 | 332 | 91% | Yes |
| 1985 | 321 | 88% | No |
| 1986 | 362 | 99% | Yes |
| 1987 | 358 | 98% | Yes |
| 1988 | 363 | 99% | Yes |
| 1989 | 354 | 97% | Yes |
| 1990 | 354 | 97% | Yes |
| 1991 | 359 | 98% | Yes |
| 1992 | 361 | 99% | Yes |
| 1993 | 351 | 96% | Yes |
| 1994 | 352 | 96% | Yes |
| 1995 | 329 | 90% | Yes |
| 1996 | 349 | 95% | Yes |
| 1997 | 344 | 94% | Yes |
| 1998 | 356 | 98% | Yes |
| 1999 | 363 | 99% | Yes |
| 2000 | 364 | 99% | Yes |
| 2001 | 357 | 98% | Yes |
| 2002 | 356 | 98% | Yes |
| 2003 | 331 | 91% | Yes |
| 2004 | 362 | 99% | Yes |
| 2005 | 356 | 98% | Yes |
| 2006 | 333 | 91% | Yes |
| 2007 | 329 | 90% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 337 | 92% | Yes |
| 2010 | 364 | 100% | Yes |
| 2011 | 364 | 100% | Yes |
| 2012 | 364 | 99% | Yes |
| 2013 | 349 | 96% | Yes |
| 2014 | 348 | 95% | Yes |
| 2015 | 353 | 97% | Yes |
| 2016 | 347 | 95% | Yes |
| 2017 | 357 | 98% | Yes |
| 2018 | 351 | 96% | Yes |
| 2019 | 324 | 89% | No |
| 2020 | 355 | 97% | Yes |
| 2021 | 364 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 363 | 99% | Yes |
| 2026 | 285 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 16 September 2026 | Chisos Basin, US | daily high min (Provisional) | 21.1 C (70.0 F) | 1.1 C (2.0 F) | 20 years | 17 of 100 (Routine) |
| 14 September 2026 | Chisos Basin, US | daily high max (Tie, Provisional) | 32.2 C (90.0 F) | tie | 76 years | 7 of 100 (Routine) |
| 12 September 2026 | Chisos Basin, US | daily high min (Provisional) | 21.7 C (71.1 F) | 1.1 C (2.0 F) | 25 years | 18 of 100 (Routine) |
| 10 September 2026 | Chisos Basin, US | daily high min (Provisional) | 19.4 C (66.9 F) | 0.5 C (0.9 F) | 3 years | 9 of 100 (Routine) |
| 8 September 2026 | Chisos Basin, US | daily high min (Tie, Provisional) | 20.0 C (68.0 F) | tie | 24 years | 3 of 100 (Routine) |
| 1 September 2026 | Chisos Basin, US | daily high min (Provisional) | 22.2 C (72.0 F) | 1.1 C (2.0 F) | 25 years | 18 of 100 (Routine) |
| 25 August 2026 | Chisos Basin, US | daily high max (Tie, Provisional) | 32.2 C (90.0 F) | tie | 1 year | 2 of 100 (Routine) |
| 14 August 2026 | Chisos Basin, US | daily rain | 30.2 mm (1.2 in) | 0.5 mm (0.02 in) | 36 years | 18 of 100 (Routine) |
| 12 August 2026 | Chisos Basin, US | daily high min (Tie) | 20.6 C (69.1 F) | tie | 8 years | 2 of 100 (Routine) |
| 19 April 2026 | Chisos Basin, US | daily low max | 15.0 C (59.0 F) | 0.6 C (1.1 F) | 32 years | 18 of 100 (Routine) |
| 2 April 2026 | Chisos Basin, US | daily high max | 30.6 C (87.1 F) | 0.6 C (1.1 F) | 48 years | 23 of 100 (Routine) |
| 27 March 2026 | Chisos Basin, US | daily high min | 16.7 C (62.1 F) | 1.1 C (2.0 F) | 79 years | 33 of 100 (Routine) |
| 27 March 2026 | Chisos Basin, US | daily high max | 31.7 C (89.1 F) | 1.7 C (3.1 F) | 28 years | 19 of 100 (Routine) |
| 26 March 2026 | Chisos Basin, US | daily high max | 31.1 C (88.0 F) | 1.7 C (3.1 F) | 28 years | 19 of 100 (Routine) |
| 23 March 2026 | Chisos Basin, US | daily high max | 30.6 C (87.1 F) | 0.6 C (1.1 F) | 8 years | 11 of 100 (Routine) |
| 22 March 2026 | Chisos Basin, US | daily high max | 30.6 C (87.1 F) | 1.2 C (2.2 F) | 72 years | 31 of 100 (Routine) |
| 21 March 2026 | Chisos Basin, US | daily high max | 28.9 C (84.0 F) | 1.1 C (2.0 F) | 51 years | 25 of 100 (Routine) |
| 10 March 2026 | Chisos Basin, US | daily high min | 16.1 C (61.0 F) | 0.5 C (0.9 F) | 68 years | 29 of 100 (Routine) |
| 7 March 2026 | Chisos Basin, US | daily high min | 15.0 C (59.0 F) | 0.6 C (1.1 F) | 61 years | 27 of 100 (Routine) |
| 6 March 2026 | Chisos Basin, US | daily high max | 27.2 C (81.0 F) | 0.5 C (0.9 F) | 75 years | 31 of 100 (Routine) |
Climate Trend
66 complete years, 1948 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1948 | 17.6 C | +0.63 C |
| 1949 | 16.9 C | -0.03 C |
| 1950 | 18.1 C | +1.14 C |
| 1951 | 17.8 C | +0.88 C |
| 1952 | 16.7 C | -0.22 C |
| 1955 | 17.5 C | +0.56 C |
| 1956 | 17.5 C | +0.53 C |
| 1958 | 16.7 C | -0.23 C |
| 1959 | 16.9 C | -0.06 C |
| 1960 | 17.1 C | +0.14 C |
| 1961 | 17.0 C | +0.08 C |
| 1962 | 17.9 C | +0.94 C |
| 1963 | 17.5 C | +0.52 C |
| 1964 | 17.2 C | +0.30 C |
| 1965 | 17.5 C | +0.56 C |
| 1966 | 16.5 C | -0.46 C |
| 1967 | 16.7 C | -0.21 C |
| 1968 | 15.8 C | -1.09 C |
| 1969 | 16.9 C | -0.04 C |
| 1970 | 16.1 C | -0.80 C |
| 1971 | 16.6 C | -0.37 C |
| 1972 | 17.2 C | +0.28 C |
| 1973 | 16.1 C | -0.85 C |
| 1974 | 16.8 C | -0.11 C |
| 1975 | 16.4 C | -0.53 C |
| 1976 | 15.2 C | -1.72 C |
| 1977 | 17.3 C | +0.33 C |
| 1978 | 16.5 C | -0.43 C |
| 1979 | 16.2 C | -0.75 C |
| 1980 | 16.7 C | -0.22 C |
| 1981 | 16.2 C | -0.78 C |
| 1982 | 16.7 C | -0.24 C |
| 1983 | 16.3 C | -0.64 C |
| 1986 | 16.4 C | -0.58 C |
| 1987 | 15.5 C | -1.41 C |
| 1988 | 16.2 C | -0.73 C |
| 1989 | 17.1 C | +0.19 C |
| 1990 | 16.6 C | -0.29 C |
| 1991 | 16.0 C | -0.95 C |
| 1992 | 15.7 C | -1.28 C |
| 1993 | 16.5 C | -0.45 C |
| 1994 | 17.2 C | +0.26 C |
| 1996 | 17.1 C | +0.19 C |
| 1997 | 15.9 C | -1.05 C |
| 1998 | 17.2 C | +0.25 C |
| 1999 | 17.1 C | +0.19 C |
| 2000 | 17.3 C | +0.32 C |
| 2001 | 16.9 C | -0.02 C |
| 2002 | 16.5 C | -0.40 C |
| 2004 | 15.9 C | -1.07 C |
| 2005 | 16.8 C | -0.11 C |
| 2008 | 16.5 C | -0.41 C |
| 2010 | 16.3 C | -0.66 C |
| 2011 | 18.2 C | +1.28 C |
| 2012 | 17.9 C | +0.98 C |
| 2014 | 17.1 C | +0.16 C |
| 2015 | 17.1 C | +0.21 C |
| 2016 | 17.5 C | +0.61 C |
| 2017 | 18.1 C | +1.14 C |
| 2018 | 17.4 C | +0.51 C |
| 2020 | 18.0 C | +1.02 C |
| 2021 | 17.5 C | +0.59 C |
| 2022 | 17.3 C | +0.36 C |
| 2023 | 18.1 C | +1.21 C |
| 2024 | 18.6 C | +1.62 C |
| 2025 | 18.5 C | +1.53 C |
The fitted trend in annual mean temperature here over 1948 to 2025 is 0.07 C (-0.01 to 0.15) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.12 F (-0.02 to 0.27) per decade. The slope is a straight line fitted to 66 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.07 C (-0.01 to 0.15) per decade | 0.12 F (-0.02 to 0.27) per decade | 1948 to 2025 | 66 | Not clearly different from zero |
| Mean daily maximum | -0.07 C (-0.17 to 0.03) per decade | -0.1 F (-0.3 to 0.1) per decade | 1948 to 2025 | 66 | Not clearly different from zero |
| Mean daily minimum | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.3 to 0.5) per decade | 1948 to 2025 | 66 | Rise |
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1943 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 39.4 C (102.9 F) | 1972 | 35.6 C (96.1 F) | 80 |
| Coldest night (TNn) | -19.4 C (-2.9 F) | 1949 | -8.3 C (17.1 F) | 80 |
| Wettest day (Rx1day) | 109.0 mm (4.3 in) | 1966 | 47.1 mm (1.9 in) | 84 |
| Wettest five days (Rx5day) | 168.7 mm (6.6 in) | 1980 | 74.3 mm (2.9 in) | 84 |
| Longest dry spell (CDD) | 192 days | 2011 | 53 days | 84 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 1947 | 36.1 C (97.0 F) |
| 1948 | 35.0 C (95.0 F) |
| 1949 | 35.6 C (96.1 F) |
| 1950 | 35.0 C (95.0 F) |
| 1951 | 37.8 C (100.0 F) |
| 1952 | 35.6 C (96.1 F) |
| 1953 | 37.8 C (100.0 F) |
| 1954 | 36.7 C (98.1 F) |
| 1955 | 35.0 C (95.0 F) |
| 1956 | 37.2 C (99.0 F) |
| 1957 | 36.7 C (98.1 F) |
| 1958 | 38.9 C (102.0 F) |
| 1959 | 37.8 C (100.0 F) |
| 1960 | 37.2 C (99.0 F) |
| 1961 | 37.2 C (99.0 F) |
| 1962 | 36.1 C (97.0 F) |
| 1963 | 36.1 C (97.0 F) |
| 1964 | 35.0 C (95.0 F) |
| 1965 | 36.7 C (98.1 F) |
| 1966 | 33.9 C (93.0 F) |
| 1967 | 35.0 C (95.0 F) |
| 1968 | 36.1 C (97.0 F) |
| 1969 | 36.7 C (98.1 F) |
| 1970 | 35.6 C (96.1 F) |
| 1971 | 33.3 C (91.9 F) |
| 1972 | 39.4 C (102.9 F) |
| 1973 | 36.1 C (97.0 F) |
| 1974 | 36.7 C (98.1 F) |
| 1975 | 36.1 C (97.0 F) |
| 1976 | 33.9 C (93.0 F) |
| 1977 | 36.7 C (98.1 F) |
| 1978 | 36.1 C (97.0 F) |
| 1979 | 33.9 C (93.0 F) |
| 1980 | 36.7 C (98.1 F) |
| 1981 | 36.1 C (97.0 F) |
| 1982 | 34.4 C (93.9 F) |
| 1983 | 38.3 C (100.9 F) |
| 1984 | 33.3 C (91.9 F) |
| 1985 | 35.6 C (96.1 F) |
| 1986 | 32.8 C (91.0 F) |
| 1987 | 34.4 C (93.9 F) |
| 1988 | 32.2 C (90.0 F) |
| 1989 | 36.7 C (98.1 F) |
| 1990 | 35.6 C (96.1 F) |
| 1991 | 33.3 C (91.9 F) |
| 1992 | 35.0 C (95.0 F) |
| 1993 | 33.3 C (91.9 F) |
| 1994 | 36.7 C (98.1 F) |
| 1995 | 34.4 C (93.9 F) |
| 1996 | 35.6 C (96.1 F) |
| 1997 | 34.4 C (93.9 F) |
| 1998 | 36.1 C (97.0 F) |
| 1999 | 33.3 C (91.9 F) |
| 2000 | 35.6 C (96.1 F) |
| 2001 | 35.6 C (96.1 F) |
| 2002 | 35.0 C (95.0 F) |
| 2003 | 34.4 C (93.9 F) |
| 2004 | 33.9 C (93.0 F) |
| 2005 | 37.2 C (99.0 F) |
| 2006 | 33.9 C (93.0 F) |
| 2007 | 31.7 C (89.1 F) |
| 2008 | 35.6 C (96.1 F) |
| 2009 | 34.4 C (93.9 F) |
| 2010 | 37.2 C (99.0 F) |
| 2011 | 37.2 C (99.0 F) |
| 2012 | 34.4 C (93.9 F) |
| 2013 | 35.6 C (96.1 F) |
| 2014 | 35.0 C (95.0 F) |
| 2015 | 34.4 C (93.9 F) |
| 2016 | 34.4 C (93.9 F) |
| 2017 | 36.7 C (98.1 F) |
| 2018 | 37.2 C (99.0 F) |
| 2019 | 36.1 C (97.0 F) |
| 2020 | 36.1 C (97.0 F) |
| 2021 | 36.1 C (97.0 F) |
| 2022 | 35.6 C (96.1 F) |
| 2023 | 37.8 C (100.0 F) |
| 2024 | 35.6 C (96.1 F) |
| 2025 | 37.2 C (99.0 F) |
| 2026 | 35.0 C (95.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 1947 | -4.4 C (24.1 F) |
| 1948 | -15.0 C (5.0 F) |
| 1949 | -19.4 C (-2.9 F) |
| 1950 | -9.4 C (15.1 F) |
| 1951 | -14.4 C (6.1 F) |
| 1952 | -7.8 C (18.0 F) |
| 1953 | -13.9 C (7.0 F) |
| 1954 | -9.4 C (15.1 F) |
| 1955 | -11.7 C (10.9 F) |
| 1956 | -13.3 C (8.1 F) |
| 1957 | -8.9 C (16.0 F) |
| 1958 | -8.3 C (17.1 F) |
| 1959 | -6.7 C (19.9 F) |
| 1960 | -8.9 C (16.0 F) |
| 1961 | -7.2 C (19.0 F) |
| 1962 | -18.9 C (-2.0 F) |
| 1963 | -15.0 C (5.0 F) |
| 1964 | -11.1 C (12.0 F) |
| 1965 | -9.4 C (15.1 F) |
| 1966 | -8.3 C (17.1 F) |
| 1967 | -10.6 C (12.9 F) |
| 1968 | -6.1 C (21.0 F) |
| 1969 | -7.2 C (19.0 F) |
| 1970 | -8.9 C (16.0 F) |
| 1971 | -11.7 C (10.9 F) |
| 1972 | -10.0 C (14.0 F) |
| 1973 | -12.2 C (10.0 F) |
| 1974 | -8.9 C (16.0 F) |
| 1975 | -12.8 C (9.0 F) |
| 1976 | -10.6 C (12.9 F) |
| 1977 | -5.6 C (21.9 F) |
| 1978 | -10.0 C (14.0 F) |
| 1979 | -12.8 C (9.0 F) |
| 1980 | -7.8 C (18.0 F) |
| 1981 | -5.0 C (23.0 F) |
| 1982 | -7.2 C (19.0 F) |
| 1983 | -13.3 C (8.1 F) |
| 1984 | -8.9 C (16.0 F) |
| 1985 | -10.6 C (12.9 F) |
| 1986 | -7.8 C (18.0 F) |
| 1987 | -8.3 C (17.1 F) |
| 1988 | -6.7 C (19.9 F) |
| 1989 | -15.6 C (3.9 F) |
| 1990 | -3.9 C (25.0 F) |
| 1991 | -6.1 C (21.0 F) |
| 1992 | -7.8 C (18.0 F) |
| 1993 | -7.2 C (19.0 F) |
| 1994 | -7.8 C (18.0 F) |
| 1995 | -4.4 C (24.1 F) |
| 1996 | -11.7 C (10.9 F) |
| 1997 | -10.0 C (14.0 F) |
| 1998 | -3.9 C (25.0 F) |
| 1999 | -6.1 C (21.0 F) |
| 2000 | -5.6 C (21.9 F) |
| 2001 | -10.0 C (14.0 F) |
| 2002 | -7.8 C (18.0 F) |
| 2003 | -4.4 C (24.1 F) |
| 2004 | -11.1 C (12.0 F) |
| 2005 | -8.3 C (17.1 F) |
| 2006 | -5.0 C (23.0 F) |
| 2007 | -7.2 C (19.0 F) |
| 2008 | -6.1 C (21.0 F) |
| 2009 | -7.8 C (18.0 F) |
| 2010 | -11.1 C (12.0 F) |
| 2011 | -17.2 C (1.0 F) |
| 2012 | -4.4 C (24.1 F) |
| 2013 | -6.1 C (21.0 F) |
| 2014 | -8.3 C (17.1 F) |
| 2015 | -7.2 C (19.0 F) |
| 2016 | -3.9 C (25.0 F) |
| 2017 | -10.6 C (12.9 F) |
| 2018 | -8.3 C (17.1 F) |
| 2019 | -5.6 C (21.9 F) |
| 2020 | -6.1 C (21.0 F) |
| 2021 | -14.4 C (6.1 F) |
| 2022 | -12.2 C (10.0 F) |
| 2023 | -4.4 C (24.1 F) |
| 2024 | -7.8 C (18.0 F) |
| 2025 | -12.8 C (9.0 F) |
| 2026 | -3.9 C (25.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1943 | 16.5 mm (0.6 in) |
| 1944 | 58.7 mm (2.3 in) |
| 1945 | 32.8 mm (1.3 in) |
| 1946 | 44.7 mm (1.8 in) |
| 1947 | 32.8 mm (1.3 in) |
| 1948 | 54.4 mm (2.1 in) |
| 1949 | 32.8 mm (1.3 in) |
| 1950 | 54.4 mm (2.1 in) |
| 1951 | 54.6 mm (2.1 in) |
| 1952 | 50.8 mm (2.0 in) |
| 1953 | 39.4 mm (1.6 in) |
| 1954 | 45.2 mm (1.8 in) |
| 1955 | 30.5 mm (1.2 in) |
| 1956 | 22.1 mm (0.9 in) |
| 1957 | 39.4 mm (1.6 in) |
| 1958 | 31.2 mm (1.2 in) |
| 1959 | 82.8 mm (3.3 in) |
| 1960 | 50.0 mm (2.0 in) |
| 1961 | 35.6 mm (1.4 in) |
| 1962 | 44.5 mm (1.8 in) |
| 1963 | 45.2 mm (1.8 in) |
| 1964 | 24.4 mm (1.0 in) |
| 1965 | 39.9 mm (1.6 in) |
| 1966 | 109.0 mm (4.3 in) |
| 1967 | 47.8 mm (1.9 in) |
| 1968 | 36.1 mm (1.4 in) |
| 1969 | 39.4 mm (1.6 in) |
| 1970 | 87.6 mm (3.4 in) |
| 1971 | 58.9 mm (2.3 in) |
| 1972 | 56.4 mm (2.2 in) |
| 1973 | 42.7 mm (1.7 in) |
| 1974 | 102.1 mm (4.0 in) |
| 1975 | 49.0 mm (1.9 in) |
| 1976 | 55.9 mm (2.2 in) |
| 1977 | 26.4 mm (1.0 in) |
| 1978 | 58.9 mm (2.3 in) |
| 1979 | 37.3 mm (1.5 in) |
| 1980 | 60.2 mm (2.4 in) |
| 1981 | 42.2 mm (1.7 in) |
| 1982 | 45.7 mm (1.8 in) |
| 1983 | 47.2 mm (1.9 in) |
| 1984 | 40.1 mm (1.6 in) |
| 1985 | 34.5 mm (1.4 in) |
| 1986 | 52.1 mm (2.1 in) |
| 1987 | 58.4 mm (2.3 in) |
| 1988 | 88.9 mm (3.5 in) |
| 1989 | 17.8 mm (0.7 in) |
| 1990 | 66.0 mm (2.6 in) |
| 1991 | 58.4 mm (2.3 in) |
| 1992 | 84.1 mm (3.3 in) |
| 1993 | 51.1 mm (2.0 in) |
| 1994 | 47.0 mm (1.9 in) |
| 1995 | 89.9 mm (3.5 in) |
| 1996 | 72.4 mm (2.9 in) |
| 1997 | 31.8 mm (1.3 in) |
| 1998 | 27.4 mm (1.1 in) |
| 1999 | 62.5 mm (2.5 in) |
| 2000 | 48.8 mm (1.9 in) |
| 2001 | 52.1 mm (2.1 in) |
| 2002 | 62.0 mm (2.4 in) |
| 2003 | 66.0 mm (2.6 in) |
| 2004 | 40.1 mm (1.6 in) |
| 2005 | 31.0 mm (1.2 in) |
| 2006 | 18.8 mm (0.7 in) |
| 2007 | 49.5 mm (1.9 in) |
| 2008 | 43.4 mm (1.7 in) |
| 2009 | 34.8 mm (1.4 in) |
| 2010 | 55.9 mm (2.2 in) |
| 2011 | 25.4 mm (1.0 in) |
| 2012 | 59.7 mm (2.4 in) |
| 2013 | 36.8 mm (1.4 in) |
| 2014 | 87.6 mm (3.4 in) |
| 2015 | 34.3 mm (1.4 in) |
| 2016 | 50.8 mm (2.0 in) |
| 2017 | 61.0 mm (2.4 in) |
| 2018 | 63.5 mm (2.5 in) |
| 2019 | 48.3 mm (1.9 in) |
| 2020 | 27.2 mm (1.1 in) |
| 2021 | 68.6 mm (2.7 in) |
| 2022 | 40.1 mm (1.6 in) |
| 2023 | 48.3 mm (1.9 in) |
| 2024 | 40.4 mm (1.6 in) |
| 2025 | 36.6 mm (1.4 in) |
| 2026 | 30.5 mm (1.2 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1943 | 33.0 mm (1.3 in) |
| 1944 | 81.6 mm (3.2 in) |
| 1945 | 59.2 mm (2.3 in) |
| 1946 | 77.9 mm (3.1 in) |
| 1947 | 47.5 mm (1.9 in) |
| 1948 | 68.7 mm (2.7 in) |
| 1949 | 83.1 mm (3.3 in) |
| 1950 | 82.1 mm (3.2 in) |
| 1951 | 83.8 mm (3.3 in) |
| 1952 | 99.1 mm (3.9 in) |
| 1953 | 39.4 mm (1.6 in) |
| 1954 | 70.1 mm (2.8 in) |
| 1955 | 60.2 mm (2.4 in) |
| 1956 | 53.8 mm (2.1 in) |
| 1957 | 70.1 mm (2.8 in) |
| 1958 | 45.0 mm (1.8 in) |
| 1959 | 89.4 mm (3.5 in) |
| 1960 | 74.1 mm (2.9 in) |
| 1961 | 67.6 mm (2.7 in) |
| 1962 | 57.7 mm (2.3 in) |
| 1963 | 56.6 mm (2.2 in) |
| 1964 | 38.4 mm (1.5 in) |
| 1965 | 64.8 mm (2.6 in) |
| 1966 | 164.4 mm (6.5 in) |
| 1967 | 105.0 mm (4.1 in) |
| 1968 | 58.0 mm (2.3 in) |
| 1969 | 50.1 mm (2.0 in) |
| 1970 | 133.9 mm (5.3 in) |
| 1971 | 108.7 mm (4.3 in) |
| 1972 | 76.8 mm (3.0 in) |
| 1973 | 69.5 mm (2.7 in) |
| 1974 | 166.9 mm (6.6 in) |
| 1975 | 95.7 mm (3.8 in) |
| 1976 | 114.0 mm (4.5 in) |
| 1977 | 55.6 mm (2.2 in) |
| 1978 | 110.2 mm (4.3 in) |
| 1979 | 61.6 mm (2.4 in) |
| 1980 | 168.7 mm (6.6 in) |
| 1981 | 91.6 mm (3.6 in) |
| 1982 | 74.5 mm (2.9 in) |
| 1983 | 76.2 mm (3.0 in) |
| 1984 | 84.7 mm (3.3 in) |
| 1985 | 52.3 mm (2.1 in) |
| 1986 | 90.4 mm (3.6 in) |
| 1987 | 81.5 mm (3.2 in) |
| 1988 | 92.7 mm (3.6 in) |
| 1989 | 54.6 mm (2.1 in) |
| 1990 | 131.8 mm (5.2 in) |
| 1991 | 119.1 mm (4.7 in) |
| 1992 | 139.2 mm (5.5 in) |
| 1993 | 53.2 mm (2.1 in) |
| 1994 | 47.5 mm (1.9 in) |
| 1995 | 128.0 mm (5.0 in) |
| 1996 | 87.2 mm (3.4 in) |
| 1997 | 51.9 mm (2.0 in) |
| 1998 | 56.9 mm (2.2 in) |
| 1999 | 67.1 mm (2.6 in) |
| 2000 | 57.2 mm (2.3 in) |
| 2001 | 63.8 mm (2.5 in) |
| 2002 | 91.3 mm (3.6 in) |
| 2003 | 105.4 mm (4.1 in) |
| 2004 | 84.3 mm (3.3 in) |
| 2005 | 48.1 mm (1.9 in) |
| 2006 | 24.7 mm (1.0 in) |
| 2007 | 84.8 mm (3.3 in) |
| 2008 | 81.6 mm (3.2 in) |
| 2009 | 66.6 mm (2.6 in) |
| 2010 | 81.0 mm (3.2 in) |
| 2011 | 28.0 mm (1.1 in) |
| 2012 | 64.3 mm (2.5 in) |
| 2013 | 53.6 mm (2.1 in) |
| 2014 | 99.0 mm (3.9 in) |
| 2015 | 44.7 mm (1.8 in) |
| 2016 | 99.0 mm (3.9 in) |
| 2017 | 69.0 mm (2.7 in) |
| 2018 | 109.2 mm (4.3 in) |
| 2019 | 95.3 mm (3.8 in) |
| 2020 | 29.5 mm (1.2 in) |
| 2021 | 152.9 mm (6.0 in) |
| 2022 | 61.7 mm (2.4 in) |
| 2023 | 75.7 mm (3.0 in) |
| 2024 | 60.3 mm (2.4 in) |
| 2025 | 81.8 mm (3.2 in) |
| 2026 | 59.8 mm (2.4 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1943 | 42 days |
| 1944 | 46 days |
| 1945 | 83 days |
| 1946 | 60 days |
| 1947 | 50 days |
| 1948 | 78 days |
| 1949 | 45 days |
| 1950 | 98 days |
| 1951 | 46 days |
| 1952 | 94 days |
| 1953 | 47 days |
| 1954 | 86 days |
| 1955 | 103 days |
| 1956 | 110 days |
| 1957 | 31 days |
| 1958 | 28 days |
| 1959 | 52 days |
| 1960 | 43 days |
| 1961 | 46 days |
| 1962 | 43 days |
| 1963 | 33 days |
| 1964 | 47 days |
| 1965 | 70 days |
| 1966 | 73 days |
| 1967 | 46 days |
| 1968 | 31 days |
| 1969 | 52 days |
| 1970 | 57 days |
| 1971 | 134 days |
| 1972 | 48 days |
| 1973 | 100 days |
| 1974 | 72 days |
| 1975 | 96 days |
| 1976 | 68 days |
| 1977 | 73 days |
| 1978 | 33 days |
| 1979 | 53 days |
| 1980 | 54 days |
| 1981 | 68 days |
| 1982 | 33 days |
| 1983 | 30 days |
| 1984 | 45 days |
| 1985 | 34 days |
| 1986 | 69 days |
| 1987 | 52 days |
| 1988 | 56 days |
| 1989 | 38 days |
| 1990 | 30 days |
| 1991 | 27 days |
| 1992 | 35 days |
| 1993 | 57 days |
| 1994 | 38 days |
| 1995 | 41 days |
| 1996 | 63 days |
| 1997 | 35 days |
| 1998 | 86 days |
| 1999 | 74 days |
| 2000 | 37 days |
| 2001 | 47 days |
| 2002 | 67 days |
| 2003 | 44 days |
| 2004 | 39 days |
| 2005 | 59 days |
| 2006 | 84 days |
| 2007 | 50 days |
| 2008 | 55 days |
| 2009 | 60 days |
| 2010 | 96 days |
| 2011 | 192 days |
| 2012 | 36 days |
| 2013 | 121 days |
| 2014 | 56 days |
| 2015 | 20 days |
| 2016 | 64 days |
| 2017 | 62 days |
| 2018 | 60 days |
| 2019 | 49 days |
| 2020 | 81 days |
| 2021 | 39 days |
| 2022 | 108 days |
| 2023 | 47 days |
| 2024 | 89 days |
| 2025 | 91 days |
| 2026 | 53 days |
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
65 years with a frostAcross 65 years with a frost, the median last spring frost at Chisos Basin falls on 16 March and the median first autumn frost on 16 November, which leaves a median of 246 days between them.
In 1988 to 2024 the median growing season was 254 days. That is 21 days more than in 1948 to 1980.
Fitted over all years, the growing season changes by +4.9 days per decade at this station.
| Measure | Median, all years | Earliest period (1948 to 1980) | Recent period (1988 to 2024) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 16 March | 21 March | 8 March | 13 days earlier | -3.0 days per decade |
| First autumn frost | 16 November | 9 November | 17 November | 8 days later | +1.9 days per decade |
| Growing days | 246 days | 233 days | 254 days | 21 days more | +4.9 days per decade |
A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.
Rainfall Return Levels
79 years, 1945 to 2025A day with at least 46.5 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 109.4 mm (4.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 46.5 mm (1.8 in) | |
| 5 years | 63.2 mm (2.5 in) | |
| 10 years | 74.3 mm (2.9 in) | |
| 25 years | 88.4 mm (3.5 in) | |
| 50 years | 98.9 mm (3.9 in) | |
| 100 years | 109.4 mm (4.3 in) | Longer than the 79 years of record |
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 79 years of values from 1945 to 2025.
A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.
The largest wettest-day totals in the fit: 109.0 mm (4.3 in) in 1966; 102.1 mm (4.0 in) in 1974; 89.9 mm (3.5 in) in 1995.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Chisos Basin, at 2020. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2020 ran 0.5 C (0.9 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 2020 | -0.5 | -0.9 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
2008 to 2025 against 1961 to 1990Over 2008 to 2025, Chisos Basin had a mean temperature of 17.6 C (63.7 F) and 407.2 mm (16.0 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Presa Chihuahua (Smn) (Mexico, 288 km away), Ojo Caliente (Mexico, 256 km away) and El Sitio (Mexico, 348 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Presa Chihuahua (Smn) | Mexico | 288 km (179 mi) | 17.5 C (63.4 F) | 470.2 mm (18.5 in) | 0.47 |
| Ojo Caliente | Mexico | 256 km (159 mi) | 17.4 C (63.3 F) | 365.7 mm (14.4 in) | 0.56 |
| El Sitio | Mexico | 348 km (216 mi) | 17.9 C (64.1 F) | 462.2 mm (18.2 in) | 0.63 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-15).