Circle Weather Records (USC00241758)
Record envelope, standing records and threshold days for Circle (USC00241758), Montana, United States, with 64 years of record.
Key Facts for Circle
- Circle (USC00241758) is a weather station in Montana, United States at 47.41 latitude and -105.60 longitude, 756 m (2,480 ft) above sea level.
- The station reports from 1963 to 2026, 64 years of record.
- 1,464 records set at Circle still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Circle set a daily record high minimum temperature of 13.9 C (57.0 F) on 23 September 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Montana, United States, 47.41 latitude, -105.60 longitude.
- Elevation: 756 m (2,480 ft).
- Period of record: 1963 to 2026, 64 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
19 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 18.3 C (64.9 F) | -41.1 C (-42.0 F) | 12.2 C (54.0 F) | -33.3 C (-27.9 F) |
| Feb | 21.1 C (70.0 F) | -41.7 C (-43.1 F) | 16.7 C (62.1 F) | -23.9 C (-11.0 F) |
| Mar | 28.3 C (82.9 F) | -39.4 C (-38.9 F) | 26.7 C (80.1 F) | -17.2 C (1.0 F) |
| Apr | 33.3 C (91.9 F) | -21.1 C (-6.0 F) | 31.1 C (88.0 F) | -10.0 C (14.0 F) |
| May | 38.3 C (100.9 F) | -8.3 C (17.1 F) | 36.7 C (98.1 F) | -7.2 C (19.0 F) |
| Jun | 41.7 C (107.1 F) | -2.8 C (27.0 F) | 32.2 C (90.0 F) | 3.9 C (39.0 F) |
| Jul | 44.4 C (111.9 F) | 1.7 C (35.1 F) | 44.4 C (111.9 F) | 10.6 C (51.1 F) |
| Aug | 42.8 C (109.0 F) | -2.8 C (27.0 F) | 40.6 C (105.1 F) | 4.4 C (39.9 F) |
| Sep | 40.6 C (105.1 F) | -9.4 C (15.1 F) | 35.6 C (96.1 F) | 2.2 C (36.0 F) |
| Oct | 34.4 C (93.9 F) | -22.8 C (-9.0 F) | 29.4 C (84.9 F) | -0.6 C (30.9 F) |
| Nov | 26.1 C (79.0 F) | -35.0 C (-31.0 F) | n/a | n/a |
| Dec | 20.0 C (68.0 F) | -43.3 C (-45.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1963 | 14 |
| 1964 | 32 |
| 1965 | 34 |
| 1966 | 24 |
| 1967 | 29 |
| 1968 | 19 |
| 1969 | 35 |
| 1970 | 16 |
| 1971 | 18 |
| 1972 | 34 |
| 1973 | 15 |
| 1974 | 27 |
| 1975 | 10 |
| 1976 | 20 |
| 1977 | 23 |
| 1978 | 19 |
| 1979 | 25 |
| 1980 | 25 |
| 1981 | 23 |
| 1982 | 25 |
| 1983 | 37 |
| 1984 | 30 |
| 1985 | 45 |
| 1986 | 8 |
| 1987 | 21 |
| 1988 | 45 |
| 1989 | 25 |
| 1990 | 17 |
| 1991 | 25 |
| 1992 | 38 |
| 1993 | 24 |
| 1994 | 14 |
| 1995 | 23 |
| 1996 | 32 |
| 1997 | 26 |
| 1998 | 10 |
| 1999 | 22 |
| 2000 | 20 |
| 2001 | 17 |
| 2002 | 29 |
| 2003 | 33 |
| 2004 | 19 |
| 2005 | 27 |
| 2006 | 15 |
| 2007 | 18 |
| 2008 | 10 |
| 2009 | 17 |
| 2010 | 9 |
| 2011 | 9 |
| 2012 | 24 |
| 2013 | 16 |
| 2014 | 19 |
| 2015 | 21 |
| 2016 | 12 |
| 2017 | 29 |
| 2018 | 15 |
| 2019 | 14 |
| 2020 | 22 |
| 2021 | 45 |
| 2022 | 17 |
| 2023 | 24 |
| 2024 | 22 |
| 2025 | 27 |
| 2026 | 25 |
All-Time Record Progression
3 new records| Date | Kind | Detail |
|---|---|---|
| 1995-08-06 | Record high minimum temperature | Record high minimum temperature 25.6 C (78.1 F) |
| 2021-07-20 | Record high minimum temperature | Record high minimum temperature 26.1 C (79.0 F) |
| 2026-07-12 | Record high maximum temperature | Record high maximum temperature 44.4 C (111.9 F) |
Wettest Day of Each Month
Jun: 88.9 mm (3.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 21.6 mm (0.9 in) | 13 January 2002 |
| Feb | 17.5 mm (0.7 in) | 17 February 1979 |
| Mar | 24.1 mm (0.9 in) | 18 March 2003 |
| Apr | 71.1 mm (2.8 in) | 18 April 1992 |
| May | 57.7 mm (2.3 in) | 10 May 2011 |
| Jun | 88.9 mm (3.5 in) | 18 June 1964 |
| Jul | 58.4 mm (2.3 in) | 5 July 1964 |
| Aug | 43.2 mm (1.7 in) | 15 August 2009 |
| Sep | 59.4 mm (2.3 in) | 25 September 1986 |
| Oct | 32.3 mm (1.3 in) | 19 October 1971 |
| Nov | 17.0 mm (0.7 in) | 1 November 1974 |
| Dec | 22.9 mm (0.9 in) | 28 December 2003 |
Period of Record Coverage
1963 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1963 | 97 | 27% | No |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 346 | 95% | Yes |
| 1969 | 357 | 98% | Yes |
| 1970 | 359 | 98% | Yes |
| 1971 | 359 | 98% | Yes |
| 1972 | 361 | 99% | Yes |
| 1973 | 359 | 98% | Yes |
| 1974 | 359 | 98% | Yes |
| 1975 | 364 | 100% | Yes |
| 1976 | 365 | 100% | Yes |
| 1977 | 363 | 99% | Yes |
| 1978 | 363 | 99% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 362 | 99% | Yes |
| 1983 | 363 | 99% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 230 | 63% | No |
| 1987 | 362 | 99% | Yes |
| 1988 | 362 | 99% | Yes |
| 1989 | 331 | 91% | Yes |
| 1990 | 360 | 99% | Yes |
| 1991 | 364 | 100% | Yes |
| 1992 | 362 | 99% | Yes |
| 1993 | 358 | 98% | Yes |
| 1994 | 358 | 98% | Yes |
| 1995 | 355 | 97% | Yes |
| 1996 | 355 | 97% | Yes |
| 1997 | 362 | 99% | Yes |
| 1998 | 360 | 99% | Yes |
| 1999 | 363 | 99% | Yes |
| 2000 | 360 | 98% | Yes |
| 2001 | 362 | 99% | Yes |
| 2002 | 364 | 100% | Yes |
| 2003 | 364 | 100% | Yes |
| 2004 | 362 | 99% | Yes |
| 2005 | 362 | 99% | Yes |
| 2006 | 361 | 99% | Yes |
| 2007 | 364 | 100% | Yes |
| 2008 | 360 | 98% | Yes |
| 2009 | 359 | 98% | Yes |
| 2010 | 360 | 99% | Yes |
| 2011 | 360 | 99% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 323 | 88% | No |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 284 | 78% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 23 September 2026 | Circle, US | daily high min (Provisional) | 13.9 C (57.0 F) | 0.6 C (1.1 F) | 3 years | 7 of 100 (Routine) |
| 19 September 2026 | Circle, US | daily high min (Provisional) | 13.3 C (55.9 F) | 0.5 C (0.9 F) | 1 year | 7 of 100 (Routine) |
| 4 August 2026 | Circle, US | daily low min (Tie) | 4.4 C (39.9 F) | tie | 53 years | 5 of 100 (Routine) |
| 2 August 2026 | Circle, US | daily high min | 23.3 C (73.9 F) | 2.2 C (4.0 F) | 44 years | 24 of 100 (Routine) |
| 2 August 2026 | Circle, US | daily high max (Tie) | 40.6 C (105.1 F) | tie | 1 year | 1 of 100 (Routine) |
| 1 August 2026 | Circle, US | daily high max | 40.6 C (105.1 F) | 1.7 C (3.1 F) | 61 years | 27 of 100 (Routine) |
| 26 July 2026 | Circle, US | daily high min | 21.7 C (71.1 F) | 2.3 C (4.1 F) | 43 years | 24 of 100 (Routine) |
| 26 July 2026 | Circle, US | daily high max | 41.1 C (106.0 F) | 3.3 C (5.9 F) | 4 years | 14 of 100 (Routine) |
| 25 July 2026 | Circle, US | daily high max (Tie) | 41.7 C (107.1 F) | tie | 19 years | 2 of 100 (Routine) |
| 13 July 2026 | Circle, US | daily high max | 43.9 C (111.0 F) | 5.0 C (9.0 F) | 57 years | 33 of 100 (Routine) |
| 12 July 2026 | Circle, US | all-time high max | 44.4 C (111.9 F) | 1.6 C (2.9 F) | 42 years | 41 of 100 (Notable) |
| 22 June 2026 | Circle, US | daily rain | 27.2 mm (1.1 in) | 12.0 mm (0.5 in) | 12 years | 21 of 100 (Routine) |
| 29 May 2026 | Circle, US | daily high min (Tie) | 17.8 C (64.0 F) | tie | 37 years | 4 of 100 (Routine) |
| 28 May 2026 | Circle, US | monthly high min | 19.4 C (66.9 F) | 0.5 C (0.9 F) | 46 years | 30 of 100 (Routine) |
| 28 May 2026 | Circle, US | daily high max (Tie) | 33.3 C (91.9 F) | tie | 56 years | 5 of 100 (Routine) |
| 27 May 2026 | Circle, US | daily high min | 17.2 C (63.0 F) | 1.6 C (2.9 F) | 23 years | 15 of 100 (Routine) |
| 26 May 2026 | Circle, US | daily high max | 36.7 C (98.1 F) | 2.8 C (5.0 F) | 60 years | 28 of 100 (Routine) |
| 26 May 2026 | Circle, US | daily high min | 17.2 C (63.0 F) | 3.3 C (5.9 F) | 20 years | 19 of 100 (Routine) |
| 25 May 2026 | Circle, US | daily high max | 33.9 C (93.0 F) | 0.6 C (1.1 F) | 40 years | 18 of 100 (Routine) |
| 6 May 2026 | Circle, US | daily low min | -7.2 C (19.0 F) | 3.9 C (7.0 F) | 12 years | 17 of 100 (Routine) |
Climate Trend
59 complete years, 1964 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1964 | 6.5 C | -0.26 C |
| 1965 | 5.2 C | -1.51 C |
| 1966 | 6.1 C | -0.61 C |
| 1967 | 6.6 C | -0.19 C |
| 1968 | 5.9 C | -0.84 C |
| 1969 | 5.2 C | -1.60 C |
| 1970 | 5.4 C | -1.31 C |
| 1971 | 5.7 C | -1.07 C |
| 1972 | 4.7 C | -2.09 C |
| 1973 | 6.8 C | +0.03 C |
| 1974 | 6.5 C | -0.24 C |
| 1975 | 5.3 C | -1.45 C |
| 1976 | 6.8 C | +0.08 C |
| 1977 | 6.0 C | -0.74 C |
| 1978 | 4.1 C | -2.62 C |
| 1979 | 4.9 C | -1.89 C |
| 1980 | 7.2 C | +0.45 C |
| 1981 | 8.4 C | +1.64 C |
| 1982 | 4.8 C | -1.97 C |
| 1983 | 7.2 C | +0.40 C |
| 1984 | 7.2 C | +0.42 C |
| 1985 | 5.3 C | -1.43 C |
| 1987 | 8.8 C | +2.01 C |
| 1988 | 8.2 C | +1.46 C |
| 1990 | 7.8 C | +1.02 C |
| 1991 | 7.5 C | +0.73 C |
| 1992 | 7.3 C | +0.56 C |
| 1993 | 5.1 C | -1.70 C |
| 1994 | 6.6 C | -0.11 C |
| 1995 | 6.8 C | +0.09 C |
| 1996 | 4.7 C | -2.09 C |
| 1997 | 7.5 C | +0.77 C |
| 1998 | 8.0 C | +1.20 C |
| 1999 | 8.3 C | +1.56 C |
| 2000 | 7.0 C | +0.29 C |
| 2001 | 8.0 C | +1.23 C |
| 2002 | 6.8 C | +0.05 C |
| 2003 | 7.6 C | +0.83 C |
| 2004 | 6.9 C | +0.12 C |
| 2005 | 7.6 C | +0.82 C |
| 2006 | 8.4 C | +1.64 C |
| 2007 | 8.0 C | +1.20 C |
| 2008 | 6.1 C | -0.67 C |
| 2009 | 6.0 C | -0.80 C |
| 2010 | 5.9 C | -0.90 C |
| 2011 | 6.0 C | -0.77 C |
| 2012 | 8.4 C | +1.69 C |
| 2013 | 6.5 C | -0.30 C |
| 2014 | 6.2 C | -0.60 C |
| 2015 | 8.2 C | +1.48 C |
| 2016 | 8.4 C | +1.61 C |
| 2017 | 7.9 C | +1.12 C |
| 2018 | 6.0 C | -0.73 C |
| 2019 | 5.4 C | -1.39 C |
| 2021 | 8.2 C | +1.47 C |
| 2022 | 6.5 C | -0.25 C |
| 2023 | 7.9 C | +1.18 C |
| 2024 | 8.4 C | +1.65 C |
| 2025 | 7.9 C | +1.19 C |
The annual mean temperature here has risen by 0.3 C (0.1 to 0.4) per decade over 1964 to 2025. In Fahrenheit: 0.5 F (0.2 to 0.8) per decade. The slope is a straight line fitted to 59 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 (0.1 to 0.4) per decade | 0.5 F (0.2 to 0.8) per decade | 1964 to 2025 | 59 | Rise |
| Mean daily maximum | 0.3 C (0.1 to 0.5) per decade | 0.5 F (0.1 to 0.8) per decade | 1964 to 2025 | 59 | Rise |
| Mean daily minimum | 0.3 C (0.2 to 0.4) per decade | 0.6 F (0.3 to 0.8) per decade | 1964 to 2025 | 59 | 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
1963 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 44.4 C (111.9 F) | 2026 | 38.9 C (102.0 F) | 64 |
| Coldest night (TNn) | -43.3 C (-45.9 F) | 1989 | -35.0 C (-31.0 F) | 64 |
| Wettest day (Rx1day) | 88.9 mm (3.5 in) | 1964 | 34.0 mm (1.3 in) | 64 |
| Wettest five days (Rx5day) | 108.9 mm (4.3 in) | 1973 | 52.4 mm (2.1 in) | 64 |
| Longest dry spell (CDD) | 95 days | 1965 | 37 days | 64 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1963 | 33.3 C (91.9 F) |
| 1964 | 38.9 C (102.0 F) |
| 1965 | 38.9 C (102.0 F) |
| 1966 | 41.7 C (107.1 F) |
| 1967 | 37.2 C (99.0 F) |
| 1968 | 38.9 C (102.0 F) |
| 1969 | 40.0 C (104.0 F) |
| 1970 | 39.4 C (102.9 F) |
| 1971 | 40.6 C (105.1 F) |
| 1972 | 39.4 C (102.9 F) |
| 1973 | 37.2 C (99.0 F) |
| 1974 | 39.4 C (102.9 F) |
| 1975 | 38.3 C (100.9 F) |
| 1976 | 38.3 C (100.9 F) |
| 1977 | 37.2 C (99.0 F) |
| 1978 | 38.3 C (100.9 F) |
| 1979 | 37.8 C (100.0 F) |
| 1980 | 40.0 C (104.0 F) |
| 1981 | 40.0 C (104.0 F) |
| 1982 | 38.9 C (102.0 F) |
| 1983 | 42.8 C (109.0 F) |
| 1984 | 41.7 C (107.1 F) |
| 1985 | 41.1 C (106.0 F) |
| 1986 | 35.0 C (95.0 F) |
| 1987 | 36.7 C (98.1 F) |
| 1988 | 41.7 C (107.1 F) |
| 1989 | 38.9 C (102.0 F) |
| 1990 | 38.3 C (100.9 F) |
| 1991 | 36.7 C (98.1 F) |
| 1992 | 36.7 C (98.1 F) |
| 1993 | 33.3 C (91.9 F) |
| 1994 | 36.7 C (98.1 F) |
| 1995 | 41.1 C (106.0 F) |
| 1996 | 37.2 C (99.0 F) |
| 1997 | 36.7 C (98.1 F) |
| 1998 | 38.9 C (102.0 F) |
| 1999 | 39.4 C (102.9 F) |
| 2000 | 39.4 C (102.9 F) |
| 2001 | 37.8 C (100.0 F) |
| 2002 | 42.8 C (109.0 F) |
| 2003 | 40.0 C (104.0 F) |
| 2004 | 38.9 C (102.0 F) |
| 2005 | 38.3 C (100.9 F) |
| 2006 | 38.9 C (102.0 F) |
| 2007 | 42.2 C (108.0 F) |
| 2008 | 38.3 C (100.9 F) |
| 2009 | 37.2 C (99.0 F) |
| 2010 | 37.8 C (100.0 F) |
| 2011 | 35.6 C (96.1 F) |
| 2012 | 38.9 C (102.0 F) |
| 2013 | 36.7 C (98.1 F) |
| 2014 | 35.6 C (96.1 F) |
| 2015 | 40.0 C (104.0 F) |
| 2016 | 36.1 C (97.0 F) |
| 2017 | 40.6 C (105.1 F) |
| 2018 | 40.6 C (105.1 F) |
| 2019 | 36.1 C (97.0 F) |
| 2020 | 38.3 C (100.9 F) |
| 2021 | 41.1 C (106.0 F) |
| 2022 | 40.6 C (105.1 F) |
| 2023 | 39.4 C (102.9 F) |
| 2024 | 41.7 C (107.1 F) |
| 2025 | 38.9 C (102.0 F) |
| 2026 | 44.4 C (111.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1963 | -35.6 C (-32.1 F) |
| 1964 | -32.8 C (-27.0 F) |
| 1965 | -32.2 C (-26.0 F) |
| 1966 | -33.3 C (-27.9 F) |
| 1967 | -35.0 C (-31.0 F) |
| 1968 | -36.1 C (-33.0 F) |
| 1969 | -41.1 C (-42.0 F) |
| 1970 | -38.9 C (-38.0 F) |
| 1971 | -36.1 C (-33.0 F) |
| 1972 | -37.2 C (-35.0 F) |
| 1973 | -30.6 C (-23.1 F) |
| 1974 | -36.1 C (-33.0 F) |
| 1975 | -30.0 C (-22.0 F) |
| 1976 | -36.1 C (-33.0 F) |
| 1977 | -40.6 C (-41.1 F) |
| 1978 | -33.9 C (-29.0 F) |
| 1979 | -35.0 C (-31.0 F) |
| 1980 | -36.7 C (-34.1 F) |
| 1981 | -29.4 C (-20.9 F) |
| 1982 | -41.1 C (-42.0 F) |
| 1983 | -37.8 C (-36.0 F) |
| 1984 | -33.3 C (-27.9 F) |
| 1985 | -34.4 C (-29.9 F) |
| 1986 | -24.4 C (-11.9 F) |
| 1987 | -22.8 C (-9.0 F) |
| 1988 | -34.4 C (-29.9 F) |
| 1989 | -43.3 C (-45.9 F) |
| 1990 | -37.2 C (-35.0 F) |
| 1991 | -32.2 C (-26.0 F) |
| 1992 | -37.8 C (-36.0 F) |
| 1993 | -35.6 C (-32.1 F) |
| 1994 | -36.1 C (-33.0 F) |
| 1995 | -31.1 C (-24.0 F) |
| 1996 | -39.4 C (-38.9 F) |
| 1997 | -35.0 C (-31.0 F) |
| 1998 | -35.6 C (-32.1 F) |
| 1999 | -31.1 C (-24.0 F) |
| 2000 | -30.6 C (-23.1 F) |
| 2001 | -28.9 C (-20.0 F) |
| 2002 | -36.1 C (-33.0 F) |
| 2003 | -32.8 C (-27.0 F) |
| 2004 | -35.6 C (-32.1 F) |
| 2005 | -37.8 C (-36.0 F) |
| 2006 | -31.1 C (-24.0 F) |
| 2007 | -31.1 C (-24.0 F) |
| 2008 | -36.7 C (-34.1 F) |
| 2009 | -32.8 C (-27.0 F) |
| 2010 | -33.9 C (-29.0 F) |
| 2011 | -38.3 C (-36.9 F) |
| 2012 | -28.3 C (-18.9 F) |
| 2013 | -37.2 C (-35.0 F) |
| 2014 | -31.1 C (-24.0 F) |
| 2015 | -33.3 C (-27.9 F) |
| 2016 | -33.3 C (-27.9 F) |
| 2017 | -37.8 C (-36.0 F) |
| 2018 | -41.1 C (-42.0 F) |
| 2019 | -38.3 C (-36.9 F) |
| 2020 | -31.1 C (-24.0 F) |
| 2021 | -36.7 C (-34.1 F) |
| 2022 | -34.4 C (-29.9 F) |
| 2023 | -33.9 C (-29.0 F) |
| 2024 | -39.4 C (-38.9 F) |
| 2025 | -41.7 C (-43.1 F) |
| 2026 | -33.3 C (-27.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1963 | 2.3 mm (0.09 in) |
| 1964 | 88.9 mm (3.5 in) |
| 1965 | 40.4 mm (1.6 in) |
| 1966 | 21.6 mm (0.9 in) |
| 1967 | 30.0 mm (1.2 in) |
| 1968 | 34.5 mm (1.4 in) |
| 1969 | 58.9 mm (2.3 in) |
| 1970 | 39.6 mm (1.6 in) |
| 1971 | 32.3 mm (1.3 in) |
| 1972 | 26.9 mm (1.1 in) |
| 1973 | 63.2 mm (2.5 in) |
| 1974 | 29.0 mm (1.1 in) |
| 1975 | 39.9 mm (1.6 in) |
| 1976 | 40.6 mm (1.6 in) |
| 1977 | 49.0 mm (1.9 in) |
| 1978 | 43.2 mm (1.7 in) |
| 1979 | 22.1 mm (0.9 in) |
| 1980 | 29.2 mm (1.1 in) |
| 1981 | 33.5 mm (1.3 in) |
| 1982 | 28.7 mm (1.1 in) |
| 1983 | 28.2 mm (1.1 in) |
| 1984 | 32.5 mm (1.3 in) |
| 1985 | 21.6 mm (0.9 in) |
| 1986 | 59.4 mm (2.3 in) |
| 1987 | 30.7 mm (1.2 in) |
| 1988 | 33.0 mm (1.3 in) |
| 1989 | 33.5 mm (1.3 in) |
| 1990 | 23.9 mm (0.9 in) |
| 1991 | 43.2 mm (1.7 in) |
| 1992 | 71.1 mm (2.8 in) |
| 1993 | 52.1 mm (2.1 in) |
| 1994 | 30.5 mm (1.2 in) |
| 1995 | 42.4 mm (1.7 in) |
| 1996 | 30.5 mm (1.2 in) |
| 1997 | 43.2 mm (1.7 in) |
| 1998 | 29.2 mm (1.1 in) |
| 1999 | 23.9 mm (0.9 in) |
| 2000 | 26.7 mm (1.1 in) |
| 2001 | 42.4 mm (1.7 in) |
| 2002 | 21.6 mm (0.9 in) |
| 2003 | 26.9 mm (1.1 in) |
| 2004 | 13.2 mm (0.5 in) |
| 2005 | 54.6 mm (2.1 in) |
| 2006 | 36.8 mm (1.4 in) |
| 2007 | 26.2 mm (1.0 in) |
| 2008 | 47.0 mm (1.9 in) |
| 2009 | 43.2 mm (1.7 in) |
| 2010 | 48.3 mm (1.9 in) |
| 2011 | 57.7 mm (2.3 in) |
| 2012 | 26.7 mm (1.1 in) |
| 2013 | 33.0 mm (1.3 in) |
| 2014 | 43.2 mm (1.7 in) |
| 2015 | 26.9 mm (1.1 in) |
| 2016 | 30.7 mm (1.2 in) |
| 2017 | 31.8 mm (1.3 in) |
| 2018 | 36.6 mm (1.4 in) |
| 2019 | 39.6 mm (1.6 in) |
| 2020 | 40.1 mm (1.6 in) |
| 2021 | 42.7 mm (1.7 in) |
| 2022 | 44.5 mm (1.8 in) |
| 2023 | 46.0 mm (1.8 in) |
| 2024 | 45.7 mm (1.8 in) |
| 2025 | 51.6 mm (2.0 in) |
| 2026 | 27.2 mm (1.1 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1963 | 2.3 mm (0.09 in) |
| 1964 | 92.5 mm (3.6 in) |
| 1965 | 64.5 mm (2.5 in) |
| 1966 | 33.8 mm (1.3 in) |
| 1967 | 73.6 mm (2.9 in) |
| 1968 | 58.1 mm (2.3 in) |
| 1969 | 68.3 mm (2.7 in) |
| 1970 | 56.4 mm (2.2 in) |
| 1971 | 50.8 mm (2.0 in) |
| 1972 | 29.4 mm (1.2 in) |
| 1973 | 108.9 mm (4.3 in) |
| 1974 | 44.7 mm (1.8 in) |
| 1975 | 52.4 mm (2.1 in) |
| 1976 | 48.8 mm (1.9 in) |
| 1977 | 62.7 mm (2.5 in) |
| 1978 | 72.0 mm (2.8 in) |
| 1979 | 32.0 mm (1.3 in) |
| 1980 | 48.7 mm (1.9 in) |
| 1981 | 47.0 mm (1.9 in) |
| 1982 | 50.3 mm (2.0 in) |
| 1983 | 34.8 mm (1.4 in) |
| 1984 | 67.3 mm (2.6 in) |
| 1985 | 45.9 mm (1.8 in) |
| 1986 | 60.4 mm (2.4 in) |
| 1987 | 39.3 mm (1.5 in) |
| 1988 | 41.1 mm (1.6 in) |
| 1989 | 70.3 mm (2.8 in) |
| 1990 | 28.2 mm (1.1 in) |
| 1991 | 59.6 mm (2.3 in) |
| 1992 | 91.2 mm (3.6 in) |
| 1993 | 92.5 mm (3.6 in) |
| 1994 | 38.1 mm (1.5 in) |
| 1995 | 42.4 mm (1.7 in) |
| 1996 | 52.3 mm (2.1 in) |
| 1997 | 45.7 mm (1.8 in) |
| 1998 | 43.7 mm (1.7 in) |
| 1999 | 38.9 mm (1.5 in) |
| 2000 | 53.6 mm (2.1 in) |
| 2001 | 89.4 mm (3.5 in) |
| 2002 | 30.1 mm (1.2 in) |
| 2003 | 43.4 mm (1.7 in) |
| 2004 | 24.2 mm (1.0 in) |
| 2005 | 85.0 mm (3.3 in) |
| 2006 | 45.0 mm (1.8 in) |
| 2007 | 65.9 mm (2.6 in) |
| 2008 | 49.5 mm (1.9 in) |
| 2009 | 74.4 mm (2.9 in) |
| 2010 | 83.9 mm (3.3 in) |
| 2011 | 72.2 mm (2.8 in) |
| 2012 | 47.1 mm (1.9 in) |
| 2013 | 101.1 mm (4.0 in) |
| 2014 | 83.4 mm (3.3 in) |
| 2015 | 28.4 mm (1.1 in) |
| 2016 | 58.5 mm (2.3 in) |
| 2017 | 40.7 mm (1.6 in) |
| 2018 | 63.0 mm (2.5 in) |
| 2019 | 72.1 mm (2.8 in) |
| 2020 | 40.1 mm (1.6 in) |
| 2021 | 57.2 mm (2.3 in) |
| 2022 | 51.1 mm (2.0 in) |
| 2023 | 85.1 mm (3.4 in) |
| 2024 | 85.1 mm (3.4 in) |
| 2025 | 103.9 mm (4.1 in) |
| 2026 | 38.4 mm (1.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1963 | 51 days |
| 1964 | 28 days |
| 1965 | 95 days |
| 1966 | 38 days |
| 1967 | 46 days |
| 1968 | 28 days |
| 1969 | 34 days |
| 1970 | 31 days |
| 1971 | 39 days |
| 1972 | 26 days |
| 1973 | 43 days |
| 1974 | 41 days |
| 1975 | 29 days |
| 1976 | 35 days |
| 1977 | 37 days |
| 1978 | 28 days |
| 1979 | 36 days |
| 1980 | 38 days |
| 1981 | 57 days |
| 1982 | 21 days |
| 1983 | 48 days |
| 1984 | 36 days |
| 1985 | 21 days |
| 1986 | 29 days |
| 1987 | 63 days |
| 1988 | 44 days |
| 1989 | 29 days |
| 1990 | 51 days |
| 1991 | 28 days |
| 1992 | 34 days |
| 1993 | 24 days |
| 1994 | 32 days |
| 1995 | 44 days |
| 1996 | 46 days |
| 1997 | 40 days |
| 1998 | 23 days |
| 1999 | 37 days |
| 2000 | 33 days |
| 2001 | 61 days |
| 2002 | 49 days |
| 2003 | 30 days |
| 2004 | 31 days |
| 2005 | 73 days |
| 2006 | 62 days |
| 2007 | 86 days |
| 2008 | 21 days |
| 2009 | 51 days |
| 2010 | 30 days |
| 2011 | 10 days |
| 2012 | 48 days |
| 2013 | 33 days |
| 2014 | 26 days |
| 2015 | 37 days |
| 2016 | 48 days |
| 2017 | 43 days |
| 2018 | 33 days |
| 2019 | 54 days |
| 2020 | 37 days |
| 2021 | 36 days |
| 2022 | 37 days |
| 2023 | 30 days |
| 2024 | 41 days |
| 2025 | 40 days |
| 2026 | 85 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
59 years with a frostAcross 59 years with a frost, the median last spring frost at Circle falls on 15 May and the median first autumn frost on 19 September, which leaves a median of 125 days between them.
Fitted over all years, the growing season changes by +1.2 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1995 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 15 May | n/a | 18 May | n/a | +0.3 days per decade |
| First autumn frost | 19 September | n/a | 22 September | n/a | +1.5 days per decade |
| Growing days | 125 days | n/a | 124 days | n/a | +1.2 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
60 years, 1964 to 2025A day with at least 35.2 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 78.9 mm (3.1 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 35.2 mm (1.4 in) | |
| 5 years | 46.4 mm (1.8 in) | |
| 10 years | 54.0 mm (2.1 in) | |
| 25 years | 63.8 mm (2.5 in) | |
| 50 years | 71.3 mm (2.8 in) | |
| 100 years | 78.9 mm (3.1 in) | Longer than the 60 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, 60 years of values from 1964 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: 88.9 mm (3.5 in) in 1964; 71.1 mm (2.8 in) in 1992; 63.2 mm (2.5 in) in 1973.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2010 to 2025 against 1961 to 1990Over 2010 to 2025, Circle had a mean temperature of 7.2 C (44.9 F) and 384.8 mm (15.1 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Maurine 12SW (United States, 367 km away), Zeona 10 SSW (United States, 329 km away) and Bison (United States, 318 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Maurine 12SW | United States | 367 km (228 mi) | 7.3 C (45.2 F) | 416.4 mm (16.4 in) | 0.87 |
| Zeona 10 SSW | United States | 329 km (204 mi) | 7.0 C (44.5 F) | 384.0 mm (15.1 in) | 0.94 |
| Bison | United States | 318 km (198 mi) | 6.9 C (44.3 F) | 432.0 mm (17.0 in) | 0.97 |
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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-17).