Tetonia Exp STN Weather Records (USC00109065)
Record envelope, standing records and threshold days for Tetonia Exp STN (USC00109065), Idaho, United States, with 77 years of record.
Key Facts for Tetonia Exp STN
- Tetonia Exp STN (USC00109065) is a weather station in Idaho, United States at 43.86 latitude and -111.28 longitude, 1,881 m (6,170 ft) above sea level.
- The station reports from 1950 to 2026, 77 years of record.
- 1,464 records set at Tetonia Exp STN still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Tetonia Exp STN set a daily record high minimum temperature of 13.3 C (55.9 F) on 28 August 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Idaho, United States, 43.86 latitude, -111.28 longitude.
- Elevation: 1,881 m (6,170 ft).
- Period of record: 1950 to 2026, 77 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 | 15.0 C (59.0 F) | -39.4 C (-38.9 F) | 7.2 C (45.0 F) | -21.1 C (-6.0 F) |
| Feb | 15.6 C (60.1 F) | -38.3 C (-36.9 F) | 10.6 C (51.1 F) | -21.1 C (-6.0 F) |
| Mar | 21.1 C (70.0 F) | -28.9 C (-20.0 F) | 21.1 C (70.0 F) | -16.1 C (3.0 F) |
| Apr | 26.1 C (79.0 F) | -21.7 C (-7.1 F) | 22.8 C (73.0 F) | -10.0 C (14.0 F) |
| May | 31.1 C (88.0 F) | -13.9 C (7.0 F) | 27.8 C (82.0 F) | -7.2 C (19.0 F) |
| Jun | 32.8 C (91.0 F) | -7.2 C (19.0 F) | 26.7 C (80.1 F) | -2.2 C (28.0 F) |
| Jul | 36.7 C (98.1 F) | -2.2 C (28.0 F) | 33.3 C (91.9 F) | 5.6 C (42.1 F) |
| Aug | 36.1 C (97.0 F) | -5.6 C (21.9 F) | 33.3 C (91.9 F) | 2.8 C (37.0 F) |
| Sep | 33.9 C (93.0 F) | -14.4 C (6.1 F) | n/a | n/a |
| Oct | 28.3 C (82.9 F) | -22.2 C (-8.0 F) | n/a | n/a |
| Nov | 19.4 C (66.9 F) | -30.6 C (-23.1 F) | n/a | n/a |
| Dec | 13.9 C (57.0 F) | -42.8 C (-45.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1951 | 17 |
| 1952 | 21 |
| 1953 | 21 |
| 1954 | 33 |
| 1955 | 27 |
| 1956 | 26 |
| 1957 | 11 |
| 1958 | 18 |
| 1959 | 23 |
| 1960 | 29 |
| 1961 | 12 |
| 1962 | 32 |
| 1963 | 26 |
| 1964 | 21 |
| 1965 | 22 |
| 1966 | 28 |
| 1967 | 17 |
| 1968 | 15 |
| 1969 | 26 |
| 1970 | 19 |
| 1971 | 22 |
| 1972 | 21 |
| 1973 | 17 |
| 1974 | 19 |
| 1975 | 37 |
| 1976 | 9 |
| 1977 | 13 |
| 1978 | 19 |
| 1979 | 24 |
| 1980 | 19 |
| 1981 | 26 |
| 1982 | 23 |
| 1983 | 39 |
| 1984 | 21 |
| 1985 | 25 |
| 1986 | 19 |
| 1987 | 15 |
| 1988 | 20 |
| 1989 | 16 |
| 1990 | 21 |
| 1991 | 11 |
| 1992 | 18 |
| 1993 | 19 |
| 1994 | 17 |
| 1995 | 13 |
| 1996 | 21 |
| 1997 | 9 |
| 1998 | 6 |
| 1999 | 21 |
| 2000 | 7 |
| 2001 | 34 |
| 2002 | 13 |
| 2003 | 34 |
| 2004 | 11 |
| 2005 | 8 |
| 2006 | 19 |
| 2007 | 22 |
| 2008 | 22 |
| 2009 | 5 |
| 2010 | 10 |
| 2011 | 12 |
| 2012 | 14 |
| 2013 | 15 |
| 2014 | 18 |
| 2015 | 24 |
| 2016 | 15 |
| 2017 | 18 |
| 2018 | 8 |
| 2019 | 19 |
| 2020 | 34 |
| 2021 | 11 |
| 2022 | 18 |
| 2023 | 12 |
| 2024 | 11 |
| 2025 | 18 |
| 2026 | 28 |
All-Time Record Progression
15 new records| Date | Kind | Detail |
|---|---|---|
| 1981-06-27 | Record high minimum temperature | Record high minimum temperature 18.9 C (66.0 F) |
| 1983-12-23 | Record low minimum temperature | Record low minimum temperature -42.8 C (-45.0 F) |
| 1996-12-11 | Record snow depth | Record snow depth 55.9 cm (22.0 in) |
| 1996-12-12 | Record snow depth | Record snow depth 61.0 cm (24.0 in) |
| 1996-12-14 | Record snow depth | Record snow depth 76.2 cm (30.0 in) |
| 1996-12-16 | Record snow depth | Record snow depth 78.7 cm (31.0 in) |
| 1996-12-19 | Record snow depth | Record snow depth 81.3 cm (32.0 in) |
| 1996-12-20 | Record snow depth | Record snow depth 83.8 cm (33.0 in) |
| 1996-12-21 | Record snow depth | Record snow depth 99.1 cm (39.0 in) |
| 1996-12-22 | Record snow depth | Record snow depth 109.2 cm (43.0 in) |
| 1996-12-23 | Record snow depth | Record snow depth 114.3 cm (45.0 in) |
| 1996-12-24 | Record snow depth | Record snow depth 129.5 cm (51.0 in) |
| 1996-12-26 | Record snow depth | Record snow depth 147.3 cm (58.0 in) |
| 1996-12-27 | Record snow depth | Record snow depth 149.9 cm (59.0 in) |
| 2014-12-25 | Record daily snowfall | Record daily snowfall 23.1 cm (9.1 in) |
Wettest Day of Each Month
Aug: 59.7 mm (2.4 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 40.6 mm (1.6 in) | 12 January 2000 |
| Feb | 26.9 mm (1.1 in) | 25 February 2000 |
| Mar | 34.5 mm (1.4 in) | 14 March 1989 |
| Apr | 22.9 mm (0.9 in) | 15 April 2009 |
| May | 39.9 mm (1.6 in) | 8 May 2005 |
| Jun | 31.8 mm (1.3 in) | 10 June 2006 |
| Jul | 34.0 mm (1.3 in) | 23 July 1984 |
| Aug | 59.7 mm (2.4 in) | 21 August 1973 |
| Sep | 34.5 mm (1.4 in) | 21 September 2019 |
| Oct | 41.9 mm (1.6 in) | 31 October 2016 |
| Nov | 36.8 mm (1.4 in) | 8 November 2022 |
| Dec | 28.4 mm (1.1 in) | 9 December 1987 |
Period of Record Coverage
1951 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1951 | 358 | 98% | Yes |
| 1952 | 340 | 93% | Yes |
| 1953 | 355 | 97% | Yes |
| 1954 | 362 | 99% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 338 | 92% | Yes |
| 1957 | 344 | 94% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 363 | 99% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 362 | 99% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 363 | 99% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 363 | 99% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 326 | 89% | No |
| 1973 | 365 | 100% | Yes |
| 1974 | 334 | 92% | Yes |
| 1975 | 364 | 100% | Yes |
| 1976 | 364 | 99% | Yes |
| 1977 | 331 | 91% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 361 | 99% | Yes |
| 1980 | 297 | 81% | No |
| 1981 | 300 | 82% | No |
| 1982 | 358 | 98% | Yes |
| 1983 | 296 | 81% | No |
| 1984 | 264 | 72% | No |
| 1985 | 206 | 56% | No |
| 1986 | 235 | 64% | No |
| 1987 | 232 | 64% | No |
| 1988 | 233 | 64% | No |
| 1989 | 246 | 67% | No |
| 1990 | 229 | 63% | No |
| 1991 | 235 | 64% | No |
| 1992 | 240 | 66% | No |
| 1993 | 240 | 66% | No |
| 1994 | 241 | 66% | No |
| 1995 | 250 | 68% | No |
| 1996 | 340 | 93% | Yes |
| 1997 | 341 | 93% | Yes |
| 1998 | 355 | 97% | Yes |
| 1999 | 349 | 96% | Yes |
| 2000 | 336 | 92% | Yes |
| 2001 | 336 | 92% | Yes |
| 2002 | 339 | 93% | Yes |
| 2003 | 333 | 91% | Yes |
| 2004 | 314 | 86% | No |
| 2005 | 290 | 79% | No |
| 2006 | 329 | 90% | Yes |
| 2007 | 318 | 87% | No |
| 2008 | 240 | 66% | No |
| 2009 | 290 | 79% | No |
| 2010 | 276 | 76% | No |
| 2011 | 343 | 94% | Yes |
| 2012 | 343 | 94% | Yes |
| 2013 | 350 | 96% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 352 | 96% | Yes |
| 2016 | 359 | 98% | Yes |
| 2017 | 360 | 99% | Yes |
| 2018 | 351 | 96% | Yes |
| 2019 | 350 | 96% | Yes |
| 2020 | 358 | 98% | Yes |
| 2021 | 357 | 98% | Yes |
| 2022 | 345 | 95% | Yes |
| 2023 | 351 | 96% | Yes |
| 2024 | 352 | 96% | Yes |
| 2025 | 353 | 97% | Yes |
| 2026 | 235 | 64% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 28 August 2026 | Tetonia Exp STN, US | daily high min (Provisional) | 13.3 C (55.9 F) | 1.1 C (2.0 F) | 27 years | 18 of 100 (Routine) |
| 24 August 2026 | Tetonia Exp STN, US | daily high min (Tie, Provisional) | 12.8 C (55.0 F) | tie | 25 years | 3 of 100 (Routine) |
| 23 August 2026 | Tetonia Exp STN, US | daily high min (Provisional) | 10.6 C (51.1 F) | 0.6 C (1.1 F) | 20 years | 14 of 100 (Routine) |
| 22 August 2026 | Tetonia Exp STN, US | daily high min (Provisional) | 15.0 C (59.0 F) | 2.2 C (4.0 F) | 23 years | 19 of 100 (Routine) |
| 21 August 2026 | Tetonia Exp STN, US | daily high max (Tie, Provisional) | 31.1 C (88.0 F) | tie | 56 years | 6 of 100 (Routine) |
| 15 August 2026 | Tetonia Exp STN, US | daily rain (Provisional) | 21.6 mm (0.9 in) | 3.1 mm (0.12 in) | 11 years | 14 of 100 (Routine) |
| 14 August 2026 | Tetonia Exp STN, US | daily rain | 24.6 mm (1.0 in) | 11.6 mm (0.5 in) | 57 years | 20 of 100 (Routine) |
| 12 August 2026 | Tetonia Exp STN, US | daily high min | 14.4 C (57.9 F) | 0.5 C (0.9 F) | 53 years | 24 of 100 (Routine) |
| 2 August 2026 | Tetonia Exp STN, US | daily high min | 15.0 C (59.0 F) | 1.7 C (3.1 F) | 4 years | 13 of 100 (Routine) |
| 27 July 2026 | Tetonia Exp STN, US | monthly high min | 17.8 C (64.0 F) | 0.6 C (1.1 F) | 52 years | 33 of 100 (Routine) |
| 25 July 2026 | Tetonia Exp STN, US | daily high max (Tie) | 31.7 C (89.1 F) | tie | 37 years | 4 of 100 (Routine) |
| 23 July 2026 | Tetonia Exp STN, US | daily high min | 16.1 C (61.0 F) | 1.1 C (2.0 F) | 7 years | 12 of 100 (Routine) |
| 17 July 2026 | Tetonia Exp STN, US | daily high min | 16.1 C (61.0 F) | 1.1 C (2.0 F) | 4 years | 11 of 100 (Routine) |
| 11 July 2026 | Tetonia Exp STN, US | daily high min (Tie) | 11.7 C (53.1 F) | tie | 8 years | 2 of 100 (Routine) |
| 30 June 2026 | Tetonia Exp STN, US | daily rain (Tie) | 12.4 mm (0.5 in) | tie | 12 years | 2 of 100 (Routine) |
| 11 June 2026 | Tetonia Exp STN, US | daily low min | -2.2 C (28.0 F) | 1.1 C (2.0 F) | 47 years | 24 of 100 (Routine) |
| 31 May 2026 | Tetonia Exp STN, US | daily rain (Tie) | 23.6 mm (0.9 in) | tie | 8 years | 2 of 100 (Routine) |
| 14 May 2026 | Tetonia Exp STN, US | daily high max (Tie) | 27.8 C (82.0 F) | tie | 12 years | 2 of 100 (Routine) |
| 25 April 2026 | Tetonia Exp STN, US | daily low max | 2.2 C (36.0 F) | 2.2 C (4.0 F) | 68 years | 30 of 100 (Routine) |
| 8 April 2026 | Tetonia Exp STN, US | daily high max | 18.3 C (64.9 F) | 1.1 C (2.0 F) | 65 years | 27 of 100 (Routine) |
Climate Trend
48 complete years, 1951 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1951 | 3.2 C | -0.98 C |
| 1953 | 4.6 C | +0.43 C |
| 1954 | 4.7 C | +0.54 C |
| 1955 | 3.1 C | -1.05 C |
| 1958 | 4.9 C | +0.76 C |
| 1959 | 3.7 C | -0.43 C |
| 1960 | 3.8 C | -0.37 C |
| 1961 | 4.1 C | -0.06 C |
| 1962 | 4.2 C | +0.08 C |
| 1963 | 4.8 C | +0.68 C |
| 1964 | 2.7 C | -1.47 C |
| 1965 | 3.8 C | -0.36 C |
| 1966 | 4.3 C | +0.13 C |
| 1967 | 4.4 C | +0.29 C |
| 1968 | 3.6 C | -0.51 C |
| 1969 | 4.1 C | -0.04 C |
| 1970 | 3.3 C | -0.79 C |
| 1973 | 3.6 C | -0.58 C |
| 1975 | 3.1 C | -1.01 C |
| 1976 | 3.8 C | -0.33 C |
| 1978 | 3.9 C | -0.23 C |
| 1979 | 3.9 C | -0.28 C |
| 1982 | 2.5 C | -1.63 C |
| 1996 | 3.9 C | -0.21 C |
| 1997 | 3.6 C | -0.51 C |
| 1998 | 4.4 C | +0.25 C |
| 1999 | 4.5 C | +0.40 C |
| 2000 | 4.1 C | -0.01 C |
| 2001 | 4.8 C | +0.64 C |
| 2002 | 3.4 C | -0.70 C |
| 2003 | 5.2 C | +1.05 C |
| 2004 | 4.5 C | +0.34 C |
| 2006 | 4.3 C | +0.15 C |
| 2011 | 3.0 C | -1.12 C |
| 2012 | 5.3 C | +1.15 C |
| 2013 | 3.3 C | -0.86 C |
| 2014 | 4.3 C | +0.21 C |
| 2015 | 5.4 C | +1.28 C |
| 2016 | 5.2 C | +1.02 C |
| 2017 | 4.9 C | +0.75 C |
| 2018 | 4.7 C | +0.52 C |
| 2019 | 3.8 C | -0.32 C |
| 2020 | 4.6 C | +0.46 C |
| 2021 | 5.1 C | +0.95 C |
| 2022 | 3.4 C | -0.72 C |
| 2023 | 3.8 C | -0.33 C |
| 2024 | 5.4 C | +1.22 C |
| 2025 | 5.6 C | +1.46 C |
The annual mean temperature here has risen by 0.11 C (0.03 to 0.20) per decade over 1951 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 48 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.11 C (0.03 to 0.20) per decade | 0.2 F (0.1 to 0.4) per decade | 1951 to 2025 | 48 | Rise |
| Mean daily maximum | -0.08 C (-0.17 to 0.01) per decade | -0.14 F (-0.31 to 0.02) per decade | 1951 to 2025 | 48 | Not clearly different from zero |
| Mean daily minimum | 0.3 C (0.2 to 0.4) per decade | 0.6 F (0.4 to 0.7) per decade | 1951 to 2025 | 48 | 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
1950 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 36.7 C (98.1 F) | 1955 | 32.2 C (90.0 F) | 76 |
| Coldest night (TNn) | -42.8 C (-45.0 F) | 1983 | -30.6 C (-23.1 F) | 76 |
| Wettest day (Rx1day) | 59.7 mm (2.4 in) | 1973 | 25.4 mm (1.0 in) | 77 |
| Wettest five days (Rx5day) | 84.1 mm (3.3 in) | 1993 | 39.9 mm (1.6 in) | 77 |
| Longest dry spell (CDD) | 72 days | 1988 | 25 days | 77 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1950 | n/a |
| 1951 | 33.3 C (91.9 F) |
| 1952 | 30.6 C (87.1 F) |
| 1953 | 33.9 C (93.0 F) |
| 1954 | 34.4 C (93.9 F) |
| 1955 | 36.7 C (98.1 F) |
| 1956 | 31.7 C (89.1 F) |
| 1957 | 31.7 C (89.1 F) |
| 1958 | 33.9 C (93.0 F) |
| 1959 | 32.8 C (91.0 F) |
| 1960 | 34.4 C (93.9 F) |
| 1961 | 33.9 C (93.0 F) |
| 1962 | 31.1 C (88.0 F) |
| 1963 | 32.8 C (91.0 F) |
| 1964 | 32.2 C (90.0 F) |
| 1965 | 32.2 C (90.0 F) |
| 1966 | 35.6 C (96.1 F) |
| 1967 | 31.1 C (88.0 F) |
| 1968 | 32.2 C (90.0 F) |
| 1969 | 34.4 C (93.9 F) |
| 1970 | 32.2 C (90.0 F) |
| 1971 | 33.9 C (93.0 F) |
| 1972 | 33.3 C (91.9 F) |
| 1973 | 32.8 C (91.0 F) |
| 1974 | 34.4 C (93.9 F) |
| 1975 | 32.8 C (91.0 F) |
| 1976 | 33.3 C (91.9 F) |
| 1977 | 31.7 C (89.1 F) |
| 1978 | 33.3 C (91.9 F) |
| 1979 | 34.4 C (93.9 F) |
| 1980 | 31.1 C (88.0 F) |
| 1981 | 31.7 C (89.1 F) |
| 1982 | 31.1 C (88.0 F) |
| 1983 | 32.2 C (90.0 F) |
| 1984 | 31.1 C (88.0 F) |
| 1985 | 32.8 C (91.0 F) |
| 1986 | 33.3 C (91.9 F) |
| 1987 | 30.6 C (87.1 F) |
| 1988 | 32.8 C (91.0 F) |
| 1989 | 33.9 C (93.0 F) |
| 1990 | 32.8 C (91.0 F) |
| 1991 | 31.1 C (88.0 F) |
| 1992 | 31.7 C (89.1 F) |
| 1993 | 28.3 C (82.9 F) |
| 1994 | 31.7 C (89.1 F) |
| 1995 | 31.7 C (89.1 F) |
| 1996 | 31.1 C (88.0 F) |
| 1997 | 29.4 C (84.9 F) |
| 1998 | 32.2 C (90.0 F) |
| 1999 | 30.6 C (87.1 F) |
| 2000 | 33.9 C (93.0 F) |
| 2001 | 32.8 C (91.0 F) |
| 2002 | 34.4 C (93.9 F) |
| 2003 | 34.4 C (93.9 F) |
| 2004 | 30.6 C (87.1 F) |
| 2005 | 32.2 C (90.0 F) |
| 2006 | 32.8 C (91.0 F) |
| 2007 | 34.4 C (93.9 F) |
| 2008 | 31.7 C (89.1 F) |
| 2009 | 28.9 C (84.0 F) |
| 2010 | 32.2 C (90.0 F) |
| 2011 | 31.1 C (88.0 F) |
| 2012 | 31.7 C (89.1 F) |
| 2013 | 31.7 C (89.1 F) |
| 2014 | 30.0 C (86.0 F) |
| 2015 | 31.7 C (89.1 F) |
| 2016 | 30.6 C (87.1 F) |
| 2017 | 31.1 C (88.0 F) |
| 2018 | 33.9 C (93.0 F) |
| 2019 | 30.6 C (87.1 F) |
| 2020 | 32.2 C (90.0 F) |
| 2021 | 32.2 C (90.0 F) |
| 2022 | 33.9 C (93.0 F) |
| 2023 | 32.2 C (90.0 F) |
| 2024 | 32.2 C (90.0 F) |
| 2025 | 31.1 C (88.0 F) |
| 2026 | 33.3 C (91.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1950 | n/a |
| 1951 | -37.2 C (-35.0 F) |
| 1952 | -32.2 C (-26.0 F) |
| 1953 | -25.6 C (-14.1 F) |
| 1954 | -27.2 C (-17.0 F) |
| 1955 | -30.6 C (-23.1 F) |
| 1956 | -32.8 C (-27.0 F) |
| 1957 | -31.7 C (-25.1 F) |
| 1958 | -26.7 C (-16.1 F) |
| 1959 | -31.1 C (-24.0 F) |
| 1960 | -32.8 C (-27.0 F) |
| 1961 | -28.9 C (-20.0 F) |
| 1962 | -35.0 C (-31.0 F) |
| 1963 | -39.4 C (-38.9 F) |
| 1964 | -33.3 C (-27.9 F) |
| 1965 | -30.6 C (-23.1 F) |
| 1966 | -28.9 C (-20.0 F) |
| 1967 | -31.7 C (-25.1 F) |
| 1968 | -30.0 C (-22.0 F) |
| 1969 | -27.2 C (-17.0 F) |
| 1970 | -32.8 C (-27.0 F) |
| 1971 | -34.4 C (-29.9 F) |
| 1972 | -37.8 C (-36.0 F) |
| 1973 | -31.7 C (-25.1 F) |
| 1974 | -28.3 C (-18.9 F) |
| 1975 | -31.1 C (-24.0 F) |
| 1976 | -28.9 C (-20.0 F) |
| 1977 | -31.1 C (-24.0 F) |
| 1978 | -35.6 C (-32.1 F) |
| 1979 | -35.6 C (-32.1 F) |
| 1980 | -32.2 C (-26.0 F) |
| 1981 | -34.4 C (-29.9 F) |
| 1982 | -38.3 C (-36.9 F) |
| 1983 | -42.8 C (-45.0 F) |
| 1984 | -38.9 C (-38.0 F) |
| 1985 | -38.3 C (-36.9 F) |
| 1986 | -26.1 C (-15.0 F) |
| 1987 | -28.9 C (-20.0 F) |
| 1988 | -33.3 C (-27.9 F) |
| 1989 | -32.8 C (-27.0 F) |
| 1990 | -39.4 C (-38.9 F) |
| 1991 | -34.4 C (-29.9 F) |
| 1992 | -29.4 C (-20.9 F) |
| 1993 | -31.1 C (-24.0 F) |
| 1994 | -26.7 C (-16.1 F) |
| 1995 | -31.1 C (-24.0 F) |
| 1996 | -33.9 C (-29.0 F) |
| 1997 | -26.7 C (-16.1 F) |
| 1998 | -30.6 C (-23.1 F) |
| 1999 | -25.0 C (-13.0 F) |
| 2000 | -25.6 C (-14.1 F) |
| 2001 | -30.0 C (-22.0 F) |
| 2002 | -30.0 C (-22.0 F) |
| 2003 | -27.8 C (-18.0 F) |
| 2004 | -27.2 C (-17.0 F) |
| 2005 | -30.0 C (-22.0 F) |
| 2006 | -28.3 C (-18.9 F) |
| 2007 | -31.7 C (-25.1 F) |
| 2008 | -28.3 C (-18.9 F) |
| 2009 | -29.4 C (-20.9 F) |
| 2010 | -28.9 C (-20.0 F) |
| 2011 | -31.1 C (-24.0 F) |
| 2012 | -21.1 C (-6.0 F) |
| 2013 | -28.9 C (-20.0 F) |
| 2014 | -28.9 C (-20.0 F) |
| 2015 | -27.2 C (-17.0 F) |
| 2016 | -29.4 C (-20.9 F) |
| 2017 | -32.2 C (-26.0 F) |
| 2018 | -25.0 C (-13.0 F) |
| 2019 | -27.2 C (-17.0 F) |
| 2020 | -25.0 C (-13.0 F) |
| 2021 | -21.1 C (-6.0 F) |
| 2022 | -30.0 C (-22.0 F) |
| 2023 | -32.8 C (-27.0 F) |
| 2024 | -28.3 C (-18.9 F) |
| 2025 | -31.7 C (-25.1 F) |
| 2026 | -21.1 C (-6.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1950 | 25.4 mm (1.0 in) |
| 1951 | 35.8 mm (1.4 in) |
| 1952 | 23.6 mm (0.9 in) |
| 1953 | 18.3 mm (0.7 in) |
| 1954 | 25.7 mm (1.0 in) |
| 1955 | 27.7 mm (1.1 in) |
| 1956 | 25.7 mm (1.0 in) |
| 1957 | 22.4 mm (0.9 in) |
| 1958 | 15.2 mm (0.6 in) |
| 1959 | 27.9 mm (1.1 in) |
| 1960 | 14.5 mm (0.6 in) |
| 1961 | 27.9 mm (1.1 in) |
| 1962 | 23.9 mm (0.9 in) |
| 1963 | 28.2 mm (1.1 in) |
| 1964 | 20.6 mm (0.8 in) |
| 1965 | 31.0 mm (1.2 in) |
| 1966 | 21.8 mm (0.9 in) |
| 1967 | 24.1 mm (0.9 in) |
| 1968 | 22.1 mm (0.9 in) |
| 1969 | 19.6 mm (0.8 in) |
| 1970 | 22.1 mm (0.9 in) |
| 1971 | 20.8 mm (0.8 in) |
| 1972 | 14.7 mm (0.6 in) |
| 1973 | 59.7 mm (2.4 in) |
| 1974 | 17.5 mm (0.7 in) |
| 1975 | 33.8 mm (1.3 in) |
| 1976 | 16.8 mm (0.7 in) |
| 1977 | 22.6 mm (0.9 in) |
| 1978 | 24.1 mm (0.9 in) |
| 1979 | 19.6 mm (0.8 in) |
| 1980 | 20.3 mm (0.8 in) |
| 1981 | 25.9 mm (1.0 in) |
| 1982 | 20.3 mm (0.8 in) |
| 1983 | 26.7 mm (1.1 in) |
| 1984 | 34.0 mm (1.3 in) |
| 1985 | 35.6 mm (1.4 in) |
| 1986 | 20.8 mm (0.8 in) |
| 1987 | 28.4 mm (1.1 in) |
| 1988 | 10.7 mm (0.4 in) |
| 1989 | 34.5 mm (1.4 in) |
| 1990 | 14.7 mm (0.6 in) |
| 1991 | 28.7 mm (1.1 in) |
| 1992 | 23.4 mm (0.9 in) |
| 1993 | 36.8 mm (1.4 in) |
| 1994 | 27.9 mm (1.1 in) |
| 1995 | 33.5 mm (1.3 in) |
| 1996 | 19.1 mm (0.8 in) |
| 1997 | 21.8 mm (0.9 in) |
| 1998 | 25.7 mm (1.0 in) |
| 1999 | 21.6 mm (0.9 in) |
| 2000 | 40.6 mm (1.6 in) |
| 2001 | 22.1 mm (0.9 in) |
| 2002 | 36.8 mm (1.4 in) |
| 2003 | 15.7 mm (0.6 in) |
| 2004 | 29.2 mm (1.1 in) |
| 2005 | 39.9 mm (1.6 in) |
| 2006 | 31.8 mm (1.3 in) |
| 2007 | 26.4 mm (1.0 in) |
| 2008 | 35.6 mm (1.4 in) |
| 2009 | 22.9 mm (0.9 in) |
| 2010 | 22.9 mm (0.9 in) |
| 2011 | 33.0 mm (1.3 in) |
| 2012 | 16.5 mm (0.6 in) |
| 2013 | 16.5 mm (0.6 in) |
| 2014 | 33.0 mm (1.3 in) |
| 2015 | 26.2 mm (1.0 in) |
| 2016 | 41.9 mm (1.6 in) |
| 2017 | 32.5 mm (1.3 in) |
| 2018 | 30.5 mm (1.2 in) |
| 2019 | 34.5 mm (1.4 in) |
| 2020 | 23.1 mm (0.9 in) |
| 2021 | 25.4 mm (1.0 in) |
| 2022 | 36.8 mm (1.4 in) |
| 2023 | 27.9 mm (1.1 in) |
| 2024 | 19.6 mm (0.8 in) |
| 2025 | 21.8 mm (0.9 in) |
| 2026 | 24.6 mm (1.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1950 | 39.6 mm (1.6 in) |
| 1951 | 67.9 mm (2.7 in) |
| 1952 | 32.8 mm (1.3 in) |
| 1953 | 27.1 mm (1.1 in) |
| 1954 | 30.8 mm (1.2 in) |
| 1955 | 34.9 mm (1.4 in) |
| 1956 | 35.6 mm (1.4 in) |
| 1957 | 40.6 mm (1.6 in) |
| 1958 | 39.3 mm (1.5 in) |
| 1959 | 28.7 mm (1.1 in) |
| 1960 | 27.9 mm (1.1 in) |
| 1961 | 42.4 mm (1.7 in) |
| 1962 | 39.5 mm (1.6 in) |
| 1963 | 53.9 mm (2.1 in) |
| 1964 | 40.6 mm (1.6 in) |
| 1965 | 43.7 mm (1.7 in) |
| 1966 | 36.3 mm (1.4 in) |
| 1967 | 43.4 mm (1.7 in) |
| 1968 | 66.3 mm (2.6 in) |
| 1969 | 56.3 mm (2.2 in) |
| 1970 | 32.6 mm (1.3 in) |
| 1971 | 39.6 mm (1.6 in) |
| 1972 | 28.4 mm (1.1 in) |
| 1973 | 72.7 mm (2.9 in) |
| 1974 | 28.4 mm (1.1 in) |
| 1975 | 40.4 mm (1.6 in) |
| 1976 | 28.2 mm (1.1 in) |
| 1977 | 33.3 mm (1.3 in) |
| 1978 | 39.9 mm (1.6 in) |
| 1979 | 28.4 mm (1.1 in) |
| 1980 | 40.1 mm (1.6 in) |
| 1981 | 59.1 mm (2.3 in) |
| 1982 | 35.8 mm (1.4 in) |
| 1983 | 65.8 mm (2.6 in) |
| 1984 | 53.0 mm (2.1 in) |
| 1985 | 35.6 mm (1.4 in) |
| 1986 | 23.1 mm (0.9 in) |
| 1987 | 48.2 mm (1.9 in) |
| 1988 | 10.7 mm (0.4 in) |
| 1989 | 41.9 mm (1.6 in) |
| 1990 | 20.1 mm (0.8 in) |
| 1991 | 28.7 mm (1.1 in) |
| 1992 | 34.0 mm (1.3 in) |
| 1993 | 84.1 mm (3.3 in) |
| 1994 | 34.5 mm (1.4 in) |
| 1995 | 58.7 mm (2.3 in) |
| 1996 | 39.4 mm (1.6 in) |
| 1997 | 38.9 mm (1.5 in) |
| 1998 | 48.6 mm (1.9 in) |
| 1999 | 57.7 mm (2.3 in) |
| 2000 | 82.8 mm (3.3 in) |
| 2001 | 33.0 mm (1.3 in) |
| 2002 | 48.5 mm (1.9 in) |
| 2003 | 23.6 mm (0.9 in) |
| 2004 | 37.5 mm (1.5 in) |
| 2005 | 62.8 mm (2.5 in) |
| 2006 | 39.4 mm (1.6 in) |
| 2007 | 39.2 mm (1.5 in) |
| 2008 | 51.6 mm (2.0 in) |
| 2009 | 49.5 mm (1.9 in) |
| 2010 | 57.1 mm (2.2 in) |
| 2011 | 51.3 mm (2.0 in) |
| 2012 | 42.7 mm (1.7 in) |
| 2013 | 32.8 mm (1.3 in) |
| 2014 | 65.7 mm (2.6 in) |
| 2015 | 39.6 mm (1.6 in) |
| 2016 | 71.6 mm (2.8 in) |
| 2017 | 51.5 mm (2.0 in) |
| 2018 | 51.9 mm (2.0 in) |
| 2019 | 41.9 mm (1.6 in) |
| 2020 | 39.6 mm (1.6 in) |
| 2021 | 55.6 mm (2.2 in) |
| 2022 | 53.0 mm (2.1 in) |
| 2023 | 51.8 mm (2.0 in) |
| 2024 | 38.0 mm (1.5 in) |
| 2025 | 35.8 mm (1.4 in) |
| 2026 | 67.7 mm (2.7 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1950 | 27 days |
| 1951 | 26 days |
| 1952 | 64 days |
| 1953 | 20 days |
| 1954 | 24 days |
| 1955 | 18 days |
| 1956 | 28 days |
| 1957 | 28 days |
| 1958 | 29 days |
| 1959 | 31 days |
| 1960 | 22 days |
| 1961 | 31 days |
| 1962 | 22 days |
| 1963 | 26 days |
| 1964 | 28 days |
| 1965 | 26 days |
| 1966 | 26 days |
| 1967 | 22 days |
| 1968 | 22 days |
| 1969 | 35 days |
| 1970 | 23 days |
| 1971 | 21 days |
| 1972 | 24 days |
| 1973 | 18 days |
| 1974 | 37 days |
| 1975 | 19 days |
| 1976 | 42 days |
| 1977 | 40 days |
| 1978 | 54 days |
| 1979 | 31 days |
| 1980 | 27 days |
| 1981 | 31 days |
| 1982 | 18 days |
| 1983 | 19 days |
| 1984 | 22 days |
| 1985 | 19 days |
| 1986 | 28 days |
| 1987 | 30 days |
| 1988 | 72 days |
| 1989 | 26 days |
| 1990 | 23 days |
| 1991 | 22 days |
| 1992 | 28 days |
| 1993 | 32 days |
| 1994 | 22 days |
| 1995 | 23 days |
| 1996 | 26 days |
| 1997 | 18 days |
| 1998 | 17 days |
| 1999 | 24 days |
| 2000 | 19 days |
| 2001 | 26 days |
| 2002 | 25 days |
| 2003 | 31 days |
| 2004 | 19 days |
| 2005 | 21 days |
| 2006 | 34 days |
| 2007 | 45 days |
| 2008 | 24 days |
| 2009 | 14 days |
| 2010 | 24 days |
| 2011 | 26 days |
| 2012 | 33 days |
| 2013 | 25 days |
| 2014 | 24 days |
| 2015 | 21 days |
| 2016 | 30 days |
| 2017 | 17 days |
| 2018 | 36 days |
| 2019 | 29 days |
| 2020 | 28 days |
| 2021 | 28 days |
| 2022 | 24 days |
| 2023 | 25 days |
| 2024 | 17 days |
| 2025 | 24 days |
| 2026 | 16 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
48 years with a frostAcross 48 years with a frost, the median last spring frost at Tetonia Exp STN falls on 21 June and the median first autumn frost on 31 August, which leaves a median of 76 days between them.
Fitted over all years, the growing season changes by +6.5 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1975 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 21 June | n/a | 19 June | n/a | -1.7 days per decade |
| First autumn frost | 31 August | n/a | 5 September | n/a | +4.8 days per decade |
| Growing days | 76 days | n/a | 81 days | n/a | +6.5 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
53 years, 1951 to 2025A day with at least 24.3 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 54.9 mm (2.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 24.3 mm (1.0 in) | |
| 5 years | 31.3 mm (1.2 in) | |
| 10 years | 36.3 mm (1.4 in) | |
| 25 years | 43.3 mm (1.7 in) | |
| 50 years | 48.9 mm (1.9 in) | |
| 100 years | 54.9 mm (2.2 in) | Longer than the 53 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, 53 years of values from 1951 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: 59.7 mm (2.4 in) in 1973; 41.9 mm (1.6 in) in 2016; 40.6 mm (1.6 in) in 2000.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2011 to 2025 against 1961 to 1990Over 2011 to 2025, Tetonia Exp STN had a mean temperature of 4.5 C (40.1 F) and 515.4 mm (20.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Montpelier Rs (United States, 171 km away), Green Mt Dam (United States, 602 km away) and Yellowstone Park Mammoth (United States, 133 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Montpelier Rs | United States | 171 km (106 mi) | 4.9 C (40.9 F) | 378.2 mm (14.9 in) | 0.84 |
| Green Mt Dam | United States | 602 km (374 mi) | 4.3 C (39.7 F) | 387.9 mm (15.3 in) | 0.90 |
| Yellowstone Park Mammoth | United States | 133 km (83 mi) | 4.7 C (40.4 F) | 383.5 mm (15.1 in) | 0.92 |
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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-13).