Chilly Barton Flat Weather Records (USC00101671)
Record envelope, standing records and threshold days for Chilly Barton Flat (USC00101671), Idaho, United States, with 79 years of record.
Key Facts for Chilly Barton Flat
- Chilly Barton Flat (USC00101671) is a weather station in Idaho, United States at 43.98 latitude and -113.83 longitude, 1,908 m (6,260 ft) above sea level.
- The station reports from 1948 to 2026, 79 years of record.
- 1,464 records set at Chilly Barton Flat still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Chilly Barton Flat tied a daily record high maximum temperature of 26.1 C (79.0 F) on 6 October 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, 43.98 latitude, -113.83 longitude.
- Elevation: 1,908 m (6,260 ft).
- Period of record: 1948 to 2026, 79 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
22 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 10.0 C (50.0 F) | -41.1 C (-42.0 F) | 10.0 C (50.0 F) | -19.4 C (-2.9 F) |
| Feb | 12.8 C (55.0 F) | -37.8 C (-36.0 F) | 11.7 C (53.1 F) | -16.7 C (1.9 F) |
| Mar | 21.1 C (70.0 F) | -36.7 C (-34.1 F) | 21.1 C (70.0 F) | -9.4 C (15.1 F) |
| Apr | 25.6 C (78.1 F) | -21.1 C (-6.0 F) | 21.1 C (70.0 F) | -9.4 C (15.1 F) |
| May | 31.1 C (88.0 F) | -13.3 C (8.1 F) | 27.8 C (82.0 F) | -4.4 C (24.1 F) |
| Jun | 34.4 C (93.9 F) | -6.7 C (19.9 F) | 30.0 C (86.0 F) | -1.1 C (30.0 F) |
| Jul | 37.8 C (100.0 F) | -3.9 C (25.0 F) | 34.4 C (93.9 F) | 4.4 C (39.9 F) |
| Aug | 37.8 C (100.0 F) | -5.6 C (21.9 F) | 33.3 C (91.9 F) | 1.7 C (35.1 F) |
| Sep | 33.9 C (93.0 F) | -11.7 C (10.9 F) | 25.6 C (78.1 F) | -1.7 C (28.9 F) |
| Oct | 28.3 C (82.9 F) | -23.3 C (-9.9 F) | 26.1 C (79.0 F) | 1.1 C (34.0 F) |
| Nov | 19.4 C (66.9 F) | -29.4 C (-20.9 F) | n/a | n/a |
| Dec | 12.8 C (55.0 F) | -38.3 C (-36.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1948 | 23 |
| 1949 | 50 |
| 1950 | 32 |
| 1951 | 28 |
| 1952 | 47 |
| 1953 | 17 |
| 1954 | 17 |
| 1955 | 32 |
| 1956 | 30 |
| 1957 | 14 |
| 1958 | 18 |
| 1959 | 15 |
| 1960 | 34 |
| 1961 | 23 |
| 1962 | 32 |
| 1963 | 18 |
| 1964 | 24 |
| 1965 | 23 |
| 1966 | 10 |
| 1967 | 5 |
| 1968 | 15 |
| 1969 | 21 |
| 1970 | 17 |
| 1971 | 20 |
| 1972 | 18 |
| 1973 | 13 |
| 1974 | 20 |
| 1975 | 15 |
| 1976 | 7 |
| 1977 | 20 |
| 1978 | 20 |
| 1979 | 21 |
| 1980 | 10 |
| 1981 | 9 |
| 1982 | 17 |
| 1983 | 18 |
| 1984 | 20 |
| 1985 | 27 |
| 1986 | 17 |
| 1987 | 15 |
| 1988 | 22 |
| 1989 | 16 |
| 1990 | 20 |
| 1991 | 11 |
| 1992 | 26 |
| 1993 | 13 |
| 1994 | 14 |
| 1995 | 8 |
| 1996 | 17 |
| 1997 | 9 |
| 1998 | 9 |
| 1999 | 12 |
| 2000 | 11 |
| 2001 | 12 |
| 2002 | 17 |
| 2003 | 20 |
| 2004 | 13 |
| 2005 | 12 |
| 2006 | 15 |
| 2007 | 14 |
| 2008 | 17 |
| 2009 | 12 |
| 2010 | 16 |
| 2011 | 8 |
| 2012 | 21 |
| 2013 | 16 |
| 2014 | 25 |
| 2015 | 39 |
| 2016 | 16 |
| 2017 | 13 |
| 2018 | 7 |
| 2019 | 11 |
| 2020 | 18 |
| 2021 | 11 |
| 2022 | 22 |
| 2023 | 33 |
| 2024 | 5 |
| 2025 | 25 |
| 2026 | 26 |
All-Time Record Progression
5 new records| Date | Kind | Detail |
|---|---|---|
| 1983-12-23 | Record low maximum temperature | Record low maximum temperature -22.2 C (-8.0 F) |
| 2001-07-05 | Record high minimum temperature | Record high minimum temperature 19.4 C (66.9 F) |
| 2005-04-24 | Record daily precipitation | Record daily precipitation 38.1 mm (1.5 in) |
| 2005-07-22 | Record high minimum temperature | Record high minimum temperature 20.0 C (68.0 F) |
| 2007-07-24 | Record high maximum temperature | Record high maximum temperature 37.8 C (100.0 F) |
Wettest Day of Each Month
Apr: 38.1 mm (1.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 16.8 mm (0.7 in) | 2 January 1997 |
| Feb | 20.3 mm (0.8 in) | 2 February 2020 |
| Mar | 26.2 mm (1.0 in) | 11 March 1995 |
| Apr | 38.1 mm (1.5 in) | 24 April 2005 |
| May | 24.1 mm (0.9 in) | 20 May 1972 |
| Jun | 36.8 mm (1.4 in) | 14 June 1963 |
| Jul | 27.4 mm (1.1 in) | 21 July 1973 |
| Aug | 27.4 mm (1.1 in) | 22 August 1983 |
| Sep | 31.5 mm (1.2 in) | 11 September 1980 |
| Oct | 21.6 mm (0.9 in) | 4 October 2009 |
| Nov | 21.6 mm (0.9 in) | 19 November 1967 |
| Dec | 25.4 mm (1.0 in) | 24 December 2012 |
Period of Record Coverage
1948 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1948 | 153 | 42% | No |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 364 | 99% | Yes |
| 1957 | 347 | 95% | Yes |
| 1958 | 352 | 96% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 363 | 99% | Yes |
| 1961 | 364 | 100% | Yes |
| 1962 | 361 | 99% | Yes |
| 1963 | 360 | 99% | Yes |
| 1964 | 362 | 99% | Yes |
| 1965 | 327 | 90% | No |
| 1966 | 179 | 49% | No |
| 1967 | 325 | 89% | No |
| 1968 | 365 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 361 | 99% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 355 | 97% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 357 | 98% | Yes |
| 1976 | 348 | 95% | Yes |
| 1977 | 292 | 80% | No |
| 1978 | 354 | 97% | Yes |
| 1979 | 356 | 98% | Yes |
| 1980 | 361 | 99% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 357 | 98% | Yes |
| 1983 | 322 | 88% | No |
| 1984 | 364 | 99% | Yes |
| 1985 | 363 | 99% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 363 | 99% | Yes |
| 1988 | 364 | 99% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 315 | 86% | No |
| 1991 | 362 | 99% | Yes |
| 1992 | 360 | 98% | Yes |
| 1993 | 352 | 96% | Yes |
| 1994 | 351 | 96% | Yes |
| 1995 | 356 | 98% | Yes |
| 1996 | 349 | 95% | Yes |
| 1997 | 313 | 86% | No |
| 1998 | 350 | 96% | Yes |
| 1999 | 335 | 92% | Yes |
| 2000 | 342 | 93% | Yes |
| 2001 | 321 | 88% | No |
| 2002 | 312 | 85% | No |
| 2003 | 328 | 90% | No |
| 2004 | 304 | 83% | No |
| 2005 | 306 | 84% | No |
| 2006 | 333 | 91% | Yes |
| 2007 | 288 | 79% | No |
| 2008 | 277 | 76% | No |
| 2009 | 321 | 88% | No |
| 2010 | 334 | 92% | Yes |
| 2011 | 348 | 95% | Yes |
| 2012 | 339 | 93% | Yes |
| 2013 | 355 | 97% | Yes |
| 2014 | 359 | 98% | Yes |
| 2015 | 358 | 98% | Yes |
| 2016 | 324 | 89% | No |
| 2017 | 339 | 93% | Yes |
| 2018 | 331 | 91% | Yes |
| 2019 | 362 | 99% | Yes |
| 2020 | 357 | 98% | Yes |
| 2021 | 361 | 99% | Yes |
| 2022 | 355 | 97% | Yes |
| 2023 | 329 | 90% | Yes |
| 2024 | 351 | 96% | Yes |
| 2025 | 359 | 98% | Yes |
| 2026 | 278 | 76% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 6 October 2026 | Chilly Barton Flat, US | daily high max (Tie, Provisional) | 26.1 C (79.0 F) | tie | 47 years | 5 of 100 (Routine) |
| 5 October 2026 | Chilly Barton Flat, US | daily high max (Provisional) | 26.1 C (79.0 F) | 0.5 C (0.9 F) | 47 years | 21 of 100 (Routine) |
| 4 October 2026 | Chilly Barton Flat, US | daily high max (Tie, Provisional) | 26.1 C (79.0 F) | tie | 45 years | 5 of 100 (Routine) |
| 28 August 2026 | Chilly Barton Flat, US | daily high min (Provisional) | 13.3 C (55.9 F) | 0.5 C (0.9 F) | 12 years | 11 of 100 (Routine) |
| 22 August 2026 | Chilly Barton Flat, US | daily high max (Provisional) | 32.2 C (90.0 F) | 0.5 C (0.9 F) | 56 years | 25 of 100 (Routine) |
| 21 August 2026 | Chilly Barton Flat, US | daily high max (Provisional) | 32.2 C (90.0 F) | 0.5 C (0.9 F) | 16 years | 13 of 100 (Routine) |
| 8 August 2026 | Chilly Barton Flat, US | daily high max | 33.3 C (91.9 F) | 0.5 C (0.9 F) | 24 years | 15 of 100 (Routine) |
| 26 July 2026 | Chilly Barton Flat, US | daily high min | 13.9 C (57.0 F) | 0.6 C (1.1 F) | 19 years | 13 of 100 (Routine) |
| 25 July 2026 | Chilly Barton Flat, US | daily high min | 18.3 C (64.9 F) | 3.9 C (7.0 F) | 24 years | 25 of 100 (Routine) |
| 25 July 2026 | Chilly Barton Flat, US | daily high max (Tie) | 32.8 C (91.0 F) | tie | 65 years | 6 of 100 (Routine) |
| 21 July 2026 | Chilly Barton Flat, US | daily high min (Tie) | 17.2 C (63.0 F) | tie | 13 years | 2 of 100 (Routine) |
| 18 July 2026 | Chilly Barton Flat, US | daily rain | 24.9 mm (1.0 in) | 14.0 mm (0.6 in) | 39 years | 20 of 100 (Routine) |
| 13 July 2026 | Chilly Barton Flat, US | daily high min | 13.9 C (57.0 F) | 1.1 C (2.0 F) | 5 years | 11 of 100 (Routine) |
| 30 June 2026 | Chilly Barton Flat, US | daily rain | 6.4 mm (0.25 in) | 2.3 mm (0.09 in) | 11 years | 14 of 100 (Routine) |
| 28 June 2026 | Chilly Barton Flat, US | daily low max | 12.2 C (54.0 F) | 0.6 C (1.1 F) | 56 years | 25 of 100 (Routine) |
| 13 May 2026 | Chilly Barton Flat, US | daily high max | 27.8 C (82.0 F) | 1.1 C (2.0 F) | 67 years | 29 of 100 (Routine) |
| 29 March 2026 | Chilly Barton Flat, US | daily high max | 18.9 C (66.0 F) | 1.1 C (2.0 F) | 40 years | 21 of 100 (Routine) |
| 26 March 2026 | Chilly Barton Flat, US | daily high min | 2.8 C (37.0 F) | 1.1 C (2.0 F) | 32 years | 17 of 100 (Routine) |
| 25 March 2026 | Chilly Barton Flat, US | daily high max | 18.9 C (66.0 F) | 0.6 C (1.1 F) | 65 years | 27 of 100 (Routine) |
| 25 March 2026 | Chilly Barton Flat, US | daily high min | 4.4 C (39.9 F) | 0.5 C (0.9 F) | 13 years | 11 of 100 (Routine) |
Climate Trend
60 complete years, 1951 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1951 | 1.6 C | -2.80 C |
| 1952 | 1.3 C | -3.06 C |
| 1953 | 4.3 C | -0.15 C |
| 1954 | 3.9 C | -0.52 C |
| 1955 | 2.1 C | -2.26 C |
| 1956 | 2.7 C | -1.69 C |
| 1958 | 4.3 C | -0.08 C |
| 1959 | 4.7 C | +0.31 C |
| 1960 | 4.0 C | -0.40 C |
| 1961 | 4.7 C | +0.30 C |
| 1962 | 3.8 C | -0.59 C |
| 1963 | 4.1 C | -0.27 C |
| 1964 | 2.1 C | -2.33 C |
| 1968 | 3.6 C | -0.82 C |
| 1969 | 4.1 C | -0.27 C |
| 1970 | 4.0 C | -0.37 C |
| 1971 | 3.5 C | -0.92 C |
| 1972 | 4.0 C | -0.37 C |
| 1973 | 4.2 C | -0.17 C |
| 1974 | 5.1 C | +0.68 C |
| 1975 | 3.6 C | -0.81 C |
| 1976 | 4.5 C | +0.11 C |
| 1978 | 3.8 C | -0.57 C |
| 1979 | 3.8 C | -0.65 C |
| 1980 | 4.7 C | +0.31 C |
| 1981 | 5.3 C | +0.87 C |
| 1982 | 2.9 C | -1.46 C |
| 1984 | 2.9 C | -1.53 C |
| 1985 | 3.2 C | -1.19 C |
| 1986 | 4.9 C | +0.53 C |
| 1987 | 5.2 C | +0.75 C |
| 1988 | 5.5 C | +1.07 C |
| 1989 | 4.6 C | +0.18 C |
| 1991 | 4.3 C | -0.11 C |
| 1992 | 5.6 C | +1.22 C |
| 1993 | 3.1 C | -1.32 C |
| 1994 | 4.7 C | +0.32 C |
| 1995 | 4.8 C | +0.43 C |
| 1996 | 5.0 C | +0.58 C |
| 1998 | 4.9 C | +0.52 C |
| 1999 | 4.7 C | +0.31 C |
| 2000 | 5.2 C | +0.82 C |
| 2001 | 5.1 C | +0.69 C |
| 2002 | 4.3 C | -0.12 C |
| 2003 | 5.8 C | +1.44 C |
| 2006 | 4.4 C | +0.02 C |
| 2011 | 4.1 C | -0.32 C |
| 2012 | 5.6 C | +1.17 C |
| 2013 | 4.7 C | +0.30 C |
| 2014 | 5.8 C | +1.36 C |
| 2015 | 6.2 C | +1.80 C |
| 2016 | 4.9 C | +0.53 C |
| 2017 | 4.9 C | +0.51 C |
| 2018 | 5.4 C | +0.95 C |
| 2019 | 4.3 C | -0.10 C |
| 2020 | 5.3 C | +0.85 C |
| 2021 | 5.9 C | +1.53 C |
| 2022 | 4.7 C | +0.29 C |
| 2024 | 6.3 C | +1.91 C |
| 2025 | 6.8 C | +2.38 C |
The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1951 to 2025. In Fahrenheit: 0.6 F (0.4 to 0.8) per decade. The slope is a straight line fitted to 60 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.3 C (0.2 to 0.4) per decade | 0.6 F (0.4 to 0.8) per decade | 1951 to 2025 | 60 | Rise |
| Mean daily maximum | 0.11 C (-0.01 to 0.22) per decade | 0.19 F (-0.01 to 0.40) per decade | 1951 to 2025 | 60 | Not clearly different from zero |
| Mean daily minimum | 0.6 C (0.5 to 0.7) per decade | 1.0 F (0.8 to 1.2) per decade | 1951 to 2025 | 60 | 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
1948 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 37.8 C (100.0 F) | 2007 | 32.8 C (91.0 F) | 79 |
| Coldest night (TNn) | -41.1 C (-42.0 F) | 1949 | -28.9 C (-20.0 F) | 79 |
| Wettest day (Rx1day) | 38.1 mm (1.5 in) | 2005 | 18.0 mm (0.7 in) | 79 |
| Wettest five days (Rx5day) | 63.4 mm (2.5 in) | 1949 | 29.2 mm (1.1 in) | 79 |
| Longest dry spell (CDD) | 68 days | 1975 | 43 days | 79 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1948 | 30.0 C (86.0 F) |
| 1949 | 31.1 C (88.0 F) |
| 1950 | 32.2 C (90.0 F) |
| 1951 | 31.7 C (89.1 F) |
| 1952 | 31.1 C (88.0 F) |
| 1953 | 30.6 C (87.1 F) |
| 1954 | 32.2 C (90.0 F) |
| 1955 | 33.3 C (91.9 F) |
| 1956 | 30.0 C (86.0 F) |
| 1957 | 30.0 C (86.0 F) |
| 1958 | 35.6 C (96.1 F) |
| 1959 | 35.0 C (95.0 F) |
| 1960 | 35.6 C (96.1 F) |
| 1961 | 35.0 C (95.0 F) |
| 1962 | 32.2 C (90.0 F) |
| 1963 | 32.2 C (90.0 F) |
| 1964 | 33.9 C (93.0 F) |
| 1965 | 31.7 C (89.1 F) |
| 1966 | 34.4 C (93.9 F) |
| 1967 | 32.2 C (90.0 F) |
| 1968 | 32.8 C (91.0 F) |
| 1969 | 33.3 C (91.9 F) |
| 1970 | 32.2 C (90.0 F) |
| 1971 | 32.2 C (90.0 F) |
| 1972 | 32.2 C (90.0 F) |
| 1973 | 33.3 C (91.9 F) |
| 1974 | 33.3 C (91.9 F) |
| 1975 | 32.8 C (91.0 F) |
| 1976 | 32.2 C (90.0 F) |
| 1977 | 32.8 C (91.0 F) |
| 1978 | 33.3 C (91.9 F) |
| 1979 | 33.3 C (91.9 F) |
| 1980 | 34.4 C (93.9 F) |
| 1981 | 32.8 C (91.0 F) |
| 1982 | 31.7 C (89.1 F) |
| 1983 | 31.7 C (89.1 F) |
| 1984 | 31.7 C (89.1 F) |
| 1985 | 34.4 C (93.9 F) |
| 1986 | 32.8 C (91.0 F) |
| 1987 | 30.6 C (87.1 F) |
| 1988 | 34.4 C (93.9 F) |
| 1989 | 33.3 C (91.9 F) |
| 1990 | 35.0 C (95.0 F) |
| 1991 | 32.2 C (90.0 F) |
| 1992 | 34.4 C (93.9 F) |
| 1993 | 27.8 C (82.0 F) |
| 1994 | 32.2 C (90.0 F) |
| 1995 | 31.1 C (88.0 F) |
| 1996 | 32.2 C (90.0 F) |
| 1997 | 31.7 C (89.1 F) |
| 1998 | 33.9 C (93.0 F) |
| 1999 | 33.3 C (91.9 F) |
| 2000 | 34.4 C (93.9 F) |
| 2001 | 33.3 C (91.9 F) |
| 2002 | 35.6 C (96.1 F) |
| 2003 | 35.6 C (96.1 F) |
| 2004 | 31.7 C (89.1 F) |
| 2005 | 33.9 C (93.0 F) |
| 2006 | 34.4 C (93.9 F) |
| 2007 | 37.8 C (100.0 F) |
| 2008 | 37.8 C (100.0 F) |
| 2009 | 31.7 C (89.1 F) |
| 2010 | 31.7 C (89.1 F) |
| 2011 | 31.1 C (88.0 F) |
| 2012 | 31.7 C (89.1 F) |
| 2013 | 33.9 C (93.0 F) |
| 2014 | 33.9 C (93.0 F) |
| 2015 | 33.9 C (93.0 F) |
| 2016 | 31.7 C (89.1 F) |
| 2017 | 32.8 C (91.0 F) |
| 2018 | 33.9 C (93.0 F) |
| 2019 | 33.9 C (93.0 F) |
| 2020 | 33.9 C (93.0 F) |
| 2021 | 33.3 C (91.9 F) |
| 2022 | 32.8 C (91.0 F) |
| 2023 | 33.3 C (91.9 F) |
| 2024 | 34.4 C (93.9 F) |
| 2025 | 32.8 C (91.0 F) |
| 2026 | 34.4 C (93.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1948 | -33.9 C (-29.0 F) |
| 1949 | -41.1 C (-42.0 F) |
| 1950 | -37.2 C (-35.0 F) |
| 1951 | -36.7 C (-34.1 F) |
| 1952 | -37.2 C (-35.0 F) |
| 1953 | -22.8 C (-9.0 F) |
| 1954 | -28.9 C (-20.0 F) |
| 1955 | -35.6 C (-32.1 F) |
| 1956 | -37.8 C (-36.0 F) |
| 1957 | -36.1 C (-33.0 F) |
| 1958 | -29.4 C (-20.9 F) |
| 1959 | -31.7 C (-25.1 F) |
| 1960 | -37.2 C (-35.0 F) |
| 1961 | -33.3 C (-27.9 F) |
| 1962 | -36.7 C (-34.1 F) |
| 1963 | -33.3 C (-27.9 F) |
| 1964 | -36.1 C (-33.0 F) |
| 1965 | -28.9 C (-20.0 F) |
| 1966 | -30.0 C (-22.0 F) |
| 1967 | -31.7 C (-25.1 F) |
| 1968 | -30.0 C (-22.0 F) |
| 1969 | -28.3 C (-18.9 F) |
| 1970 | -29.4 C (-20.9 F) |
| 1971 | -31.7 C (-25.1 F) |
| 1972 | -33.3 C (-27.9 F) |
| 1973 | -28.9 C (-20.0 F) |
| 1974 | -31.7 C (-25.1 F) |
| 1975 | -28.3 C (-18.9 F) |
| 1976 | -26.1 C (-15.0 F) |
| 1977 | -26.7 C (-16.1 F) |
| 1978 | -36.7 C (-34.1 F) |
| 1979 | -35.6 C (-32.1 F) |
| 1980 | -35.6 C (-32.1 F) |
| 1981 | -28.3 C (-18.9 F) |
| 1982 | -34.4 C (-29.9 F) |
| 1983 | -35.6 C (-32.1 F) |
| 1984 | -35.6 C (-32.1 F) |
| 1985 | -31.7 C (-25.1 F) |
| 1986 | -26.7 C (-16.1 F) |
| 1987 | -26.7 C (-16.1 F) |
| 1988 | -28.9 C (-20.0 F) |
| 1989 | -30.0 C (-22.0 F) |
| 1990 | -38.3 C (-36.9 F) |
| 1991 | -26.1 C (-15.0 F) |
| 1992 | -26.7 C (-16.1 F) |
| 1993 | -30.6 C (-23.1 F) |
| 1994 | -26.7 C (-16.1 F) |
| 1995 | -29.4 C (-20.9 F) |
| 1996 | -32.2 C (-26.0 F) |
| 1997 | -24.4 C (-11.9 F) |
| 1998 | -27.8 C (-18.0 F) |
| 1999 | -27.2 C (-17.0 F) |
| 2000 | -25.0 C (-13.0 F) |
| 2001 | -25.6 C (-14.1 F) |
| 2002 | -27.2 C (-17.0 F) |
| 2003 | -24.4 C (-11.9 F) |
| 2004 | -28.9 C (-20.0 F) |
| 2005 | -30.6 C (-23.1 F) |
| 2006 | -28.9 C (-20.0 F) |
| 2007 | -26.7 C (-16.1 F) |
| 2008 | -30.0 C (-22.0 F) |
| 2009 | -27.8 C (-18.0 F) |
| 2010 | -27.2 C (-17.0 F) |
| 2011 | -28.9 C (-20.0 F) |
| 2012 | -26.7 C (-16.1 F) |
| 2013 | -28.9 C (-20.0 F) |
| 2014 | -28.9 C (-20.0 F) |
| 2015 | -26.1 C (-15.0 F) |
| 2016 | -30.6 C (-23.1 F) |
| 2017 | -31.1 C (-24.0 F) |
| 2018 | -26.1 C (-15.0 F) |
| 2019 | -26.1 C (-15.0 F) |
| 2020 | -23.9 C (-11.0 F) |
| 2021 | -24.4 C (-11.9 F) |
| 2022 | -26.7 C (-16.1 F) |
| 2023 | -28.9 C (-20.0 F) |
| 2024 | -24.4 C (-11.9 F) |
| 2025 | -30.6 C (-23.1 F) |
| 2026 | -19.4 C (-2.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1948 | 16.3 mm (0.6 in) |
| 1949 | 20.3 mm (0.8 in) |
| 1950 | 25.4 mm (1.0 in) |
| 1951 | 14.5 mm (0.6 in) |
| 1952 | 21.6 mm (0.9 in) |
| 1953 | 29.2 mm (1.1 in) |
| 1954 | 12.7 mm (0.5 in) |
| 1955 | 21.8 mm (0.9 in) |
| 1956 | 13.5 mm (0.5 in) |
| 1957 | 21.6 mm (0.9 in) |
| 1958 | 20.8 mm (0.8 in) |
| 1959 | 16.5 mm (0.6 in) |
| 1960 | 11.9 mm (0.5 in) |
| 1961 | 15.5 mm (0.6 in) |
| 1962 | 13.2 mm (0.5 in) |
| 1963 | 36.8 mm (1.4 in) |
| 1964 | 15.2 mm (0.6 in) |
| 1965 | 34.5 mm (1.4 in) |
| 1966 | 15.2 mm (0.6 in) |
| 1967 | 21.6 mm (0.9 in) |
| 1968 | 21.6 mm (0.9 in) |
| 1969 | 17.5 mm (0.7 in) |
| 1970 | 24.6 mm (1.0 in) |
| 1971 | 12.2 mm (0.5 in) |
| 1972 | 24.1 mm (0.9 in) |
| 1973 | 27.4 mm (1.1 in) |
| 1974 | 14.2 mm (0.6 in) |
| 1975 | 10.7 mm (0.4 in) |
| 1976 | 11.9 mm (0.5 in) |
| 1977 | 16.3 mm (0.6 in) |
| 1978 | 20.3 mm (0.8 in) |
| 1979 | 14.7 mm (0.6 in) |
| 1980 | 31.5 mm (1.2 in) |
| 1981 | 13.0 mm (0.5 in) |
| 1982 | 26.2 mm (1.0 in) |
| 1983 | 27.4 mm (1.1 in) |
| 1984 | 17.5 mm (0.7 in) |
| 1985 | 14.0 mm (0.6 in) |
| 1986 | 14.2 mm (0.6 in) |
| 1987 | 22.4 mm (0.9 in) |
| 1988 | 16.8 mm (0.7 in) |
| 1989 | 19.8 mm (0.8 in) |
| 1990 | 18.3 mm (0.7 in) |
| 1991 | 24.4 mm (1.0 in) |
| 1992 | 19.1 mm (0.8 in) |
| 1993 | 23.6 mm (0.9 in) |
| 1994 | 13.2 mm (0.5 in) |
| 1995 | 26.9 mm (1.1 in) |
| 1996 | 12.7 mm (0.5 in) |
| 1997 | 16.8 mm (0.7 in) |
| 1998 | 17.3 mm (0.7 in) |
| 1999 | 16.8 mm (0.7 in) |
| 2000 | 17.3 mm (0.7 in) |
| 2001 | 15.2 mm (0.6 in) |
| 2002 | 10.7 mm (0.4 in) |
| 2003 | 11.9 mm (0.5 in) |
| 2004 | 22.9 mm (0.9 in) |
| 2005 | 38.1 mm (1.5 in) |
| 2006 | 13.2 mm (0.5 in) |
| 2007 | 16.0 mm (0.6 in) |
| 2008 | 12.7 mm (0.5 in) |
| 2009 | 29.2 mm (1.1 in) |
| 2010 | 18.0 mm (0.7 in) |
| 2011 | 17.5 mm (0.7 in) |
| 2012 | 25.4 mm (1.0 in) |
| 2013 | 14.2 mm (0.6 in) |
| 2014 | 15.5 mm (0.6 in) |
| 2015 | 18.8 mm (0.7 in) |
| 2016 | 19.3 mm (0.8 in) |
| 2017 | 29.0 mm (1.1 in) |
| 2018 | 19.1 mm (0.8 in) |
| 2019 | 15.2 mm (0.6 in) |
| 2020 | 20.3 mm (0.8 in) |
| 2021 | 22.9 mm (0.9 in) |
| 2022 | 20.6 mm (0.8 in) |
| 2023 | 23.1 mm (0.9 in) |
| 2024 | 7.1 mm (0.28 in) |
| 2025 | 20.6 mm (0.8 in) |
| 2026 | 24.9 mm (1.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1948 | 26.5 mm (1.0 in) |
| 1949 | 63.4 mm (2.5 in) |
| 1950 | 41.7 mm (1.6 in) |
| 1951 | 28.4 mm (1.1 in) |
| 1952 | 30.5 mm (1.2 in) |
| 1953 | 46.9 mm (1.8 in) |
| 1954 | 22.9 mm (0.9 in) |
| 1955 | 26.4 mm (1.0 in) |
| 1956 | 33.8 mm (1.3 in) |
| 1957 | 30.8 mm (1.2 in) |
| 1958 | 27.2 mm (1.1 in) |
| 1959 | 20.8 mm (0.8 in) |
| 1960 | 18.5 mm (0.7 in) |
| 1961 | 24.7 mm (1.0 in) |
| 1962 | 21.9 mm (0.9 in) |
| 1963 | 62.2 mm (2.4 in) |
| 1964 | 26.4 mm (1.0 in) |
| 1965 | 36.5 mm (1.4 in) |
| 1966 | 25.4 mm (1.0 in) |
| 1967 | 22.1 mm (0.9 in) |
| 1968 | 35.3 mm (1.4 in) |
| 1969 | 26.3 mm (1.0 in) |
| 1970 | 24.6 mm (1.0 in) |
| 1971 | 23.4 mm (0.9 in) |
| 1972 | 45.2 mm (1.8 in) |
| 1973 | 39.1 mm (1.5 in) |
| 1974 | 18.0 mm (0.7 in) |
| 1975 | 18.1 mm (0.7 in) |
| 1976 | 28.0 mm (1.1 in) |
| 1977 | 34.3 mm (1.4 in) |
| 1978 | 37.1 mm (1.5 in) |
| 1979 | 15.0 mm (0.6 in) |
| 1980 | 57.3 mm (2.3 in) |
| 1981 | 18.8 mm (0.7 in) |
| 1982 | 31.5 mm (1.2 in) |
| 1983 | 45.0 mm (1.8 in) |
| 1984 | 45.3 mm (1.8 in) |
| 1985 | 28.3 mm (1.1 in) |
| 1986 | 24.7 mm (1.0 in) |
| 1987 | 38.7 mm (1.5 in) |
| 1988 | 30.3 mm (1.2 in) |
| 1989 | 33.3 mm (1.3 in) |
| 1990 | 31.2 mm (1.2 in) |
| 1991 | 42.4 mm (1.7 in) |
| 1992 | 40.1 mm (1.6 in) |
| 1993 | 57.6 mm (2.3 in) |
| 1994 | 16.6 mm (0.7 in) |
| 1995 | 42.7 mm (1.7 in) |
| 1996 | 24.2 mm (1.0 in) |
| 1997 | 29.2 mm (1.1 in) |
| 1998 | 27.4 mm (1.1 in) |
| 1999 | 29.9 mm (1.2 in) |
| 2000 | 23.9 mm (0.9 in) |
| 2001 | 24.9 mm (1.0 in) |
| 2002 | 17.3 mm (0.7 in) |
| 2003 | 17.7 mm (0.7 in) |
| 2004 | 42.0 mm (1.7 in) |
| 2005 | 46.2 mm (1.8 in) |
| 2006 | 25.9 mm (1.0 in) |
| 2007 | 19.0 mm (0.7 in) |
| 2008 | 23.7 mm (0.9 in) |
| 2009 | 41.7 mm (1.6 in) |
| 2010 | 19.8 mm (0.8 in) |
| 2011 | 39.3 mm (1.5 in) |
| 2012 | 26.0 mm (1.0 in) |
| 2013 | 16.5 mm (0.6 in) |
| 2014 | 49.3 mm (1.9 in) |
| 2015 | 29.3 mm (1.2 in) |
| 2016 | 34.8 mm (1.4 in) |
| 2017 | 32.3 mm (1.3 in) |
| 2018 | 43.2 mm (1.7 in) |
| 2019 | 24.9 mm (1.0 in) |
| 2020 | 35.0 mm (1.4 in) |
| 2021 | 35.3 mm (1.4 in) |
| 2022 | 28.7 mm (1.1 in) |
| 2023 | 45.2 mm (1.8 in) |
| 2024 | 15.5 mm (0.6 in) |
| 2025 | 28.8 mm (1.1 in) |
| 2026 | 35.3 mm (1.4 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1948 | 38 days |
| 1949 | 36 days |
| 1950 | 39 days |
| 1951 | 45 days |
| 1952 | 62 days |
| 1953 | 30 days |
| 1954 | 43 days |
| 1955 | 35 days |
| 1956 | 34 days |
| 1957 | 61 days |
| 1958 | 55 days |
| 1959 | 63 days |
| 1960 | 57 days |
| 1961 | 57 days |
| 1962 | 29 days |
| 1963 | 28 days |
| 1964 | 44 days |
| 1965 | 67 days |
| 1966 | 43 days |
| 1967 | 49 days |
| 1968 | 27 days |
| 1969 | 44 days |
| 1970 | 42 days |
| 1971 | 37 days |
| 1972 | 41 days |
| 1973 | 36 days |
| 1974 | 59 days |
| 1975 | 68 days |
| 1976 | 61 days |
| 1977 | 58 days |
| 1978 | 55 days |
| 1979 | 44 days |
| 1980 | 44 days |
| 1981 | 41 days |
| 1982 | 26 days |
| 1983 | 25 days |
| 1984 | 29 days |
| 1985 | 29 days |
| 1986 | 30 days |
| 1987 | 65 days |
| 1988 | 44 days |
| 1989 | 64 days |
| 1990 | 45 days |
| 1991 | 56 days |
| 1992 | 52 days |
| 1993 | 38 days |
| 1994 | 47 days |
| 1995 | 30 days |
| 1996 | 32 days |
| 1997 | 67 days |
| 1998 | 42 days |
| 1999 | 52 days |
| 2000 | 31 days |
| 2001 | 42 days |
| 2002 | 44 days |
| 2003 | 61 days |
| 2004 | 34 days |
| 2005 | 43 days |
| 2006 | 47 days |
| 2007 | 53 days |
| 2008 | 48 days |
| 2009 | 37 days |
| 2010 | 31 days |
| 2011 | 56 days |
| 2012 | 52 days |
| 2013 | 53 days |
| 2014 | 37 days |
| 2015 | 58 days |
| 2016 | 29 days |
| 2017 | 34 days |
| 2018 | 24 days |
| 2019 | 36 days |
| 2020 | 51 days |
| 2021 | 41 days |
| 2022 | 38 days |
| 2023 | 26 days |
| 2024 | 31 days |
| 2025 | 50 days |
| 2026 | 37 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
60 years with a frostAcross 60 years with a frost, the median last spring frost at Chilly Barton Flat falls on 19 June and the median first autumn frost on 28 August, which leaves a median of 64 days between them.
In 1987 to 2025 the median growing season was 77 days. That is 21 days more than in 1951 to 1986.
Fitted over all years, the growing season changes by +7.4 days per decade at this station.
| Measure | Median, all years | Earliest period (1951 to 1986) | Recent period (1987 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 19 June | 28 June | 15 June | 13 days earlier | -2.0 days per decade |
| First autumn frost | 28 August | 20 August | 5 September | 16 days later | +5.4 days per decade |
| Growing days | 64 days | 56 days | 77 days | 21 days more | +7.4 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
71 years, 1949 to 2025A day with at least 18.2 mm (0.7 in) of rain is expected about once in 2 years. A day with at least 39.5 mm (1.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 18.2 mm (0.7 in) | |
| 5 years | 24.0 mm (0.9 in) | |
| 10 years | 27.7 mm (1.1 in) | |
| 25 years | 32.5 mm (1.3 in) | |
| 50 years | 36.0 mm (1.4 in) | |
| 100 years | 39.5 mm (1.6 in) | Longer than the 71 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, 71 years of values from 1949 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: 38.1 mm (1.5 in) in 2005; 36.8 mm (1.4 in) in 1963; 34.5 mm (1.4 in) in 1965.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2006 to 2025 against 1961 to 1990Over 2006 to 2025, Chilly Barton Flat had a mean temperature of 5.3 C (41.5 F) and 194.3 mm (7.6 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Bitter Creek 4 NE (United States, 509 km away), Monte Vista 2W (United States, 958 km away) and Blanca 4 NW (United States, 1,002 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Bitter Creek 4 NE | United States | 509 km (316 mi) | 5.1 C (41.2 F) | 174.4 mm (6.9 in) | 0.45 |
| Monte Vista 2W | United States | 958 km (595 mi) | 5.3 C (41.5 F) | 188.2 mm (7.4 in) | 0.61 |
| Blanca 4 NW | United States | 1,002 km (623 mi) | 5.5 C (42.0 F) | 214.0 mm (8.4 in) | 0.62 |
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 (2026-10-14).