Circle Hot Springs Weather Records (USC00501987)
Record envelope, standing records and threshold days for Circle Hot Springs (USC00501987), Alaska, United States, with 92 years of record.
Key Facts for Circle Hot Springs
- Circle Hot Springs (USC00501987) is a weather station in Alaska, United States at 65.49 latitude and -144.64 longitude, 262 m (860 ft) above sea level.
- The station reports from 1935 to 2026, 92 years of record.
- 1,464 records set at Circle Hot Springs still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Circle Hot Springs set a daily record high minimum temperature of 10.6 C (51.1 F) on 12 September 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Alaska, United States, 65.49 latitude, -144.64 longitude.
- Elevation: 262 m (860 ft).
- Period of record: 1935 to 2026, 92 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
13 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 9.4 C (48.9 F) | -51.1 C (-60.0 F) | -4.4 C (24.1 F) | -48.9 C (-56.0 F) |
| Feb | 10.6 C (51.1 F) | -50.0 C (-58.0 F) | -5.0 C (23.0 F) | -45.6 C (-50.1 F) |
| Mar | 11.7 C (53.1 F) | -42.8 C (-45.0 F) | -4.4 C (24.1 F) | -42.8 C (-45.0 F) |
| Apr | 20.0 C (68.0 F) | -36.1 C (-33.0 F) | 12.8 C (55.0 F) | -25.6 C (-14.1 F) |
| May | 32.2 C (90.0 F) | -22.2 C (-8.0 F) | 17.8 C (64.0 F) | -4.4 C (24.1 F) |
| Jun | 34.4 C (93.9 F) | -7.2 C (19.0 F) | 26.1 C (79.0 F) | -1.1 C (30.0 F) |
| Jul | 34.4 C (93.9 F) | -3.9 C (25.0 F) | 29.4 C (84.9 F) | -2.2 C (28.0 F) |
| Aug | 31.1 C (88.0 F) | -7.2 C (19.0 F) | 26.1 C (79.0 F) | -2.2 C (28.0 F) |
| Sep | 25.6 C (78.1 F) | -20.6 C (-5.1 F) | 17.2 C (63.0 F) | -8.3 C (17.1 F) |
| Oct | 21.7 C (71.1 F) | -40.6 C (-41.1 F) | 3.3 C (37.9 F) | -17.8 C (0.0 F) |
| Nov | 10.6 C (51.1 F) | -46.1 C (-51.0 F) | n/a | n/a |
| Dec | 7.8 C (46.0 F) | -51.1 C (-60.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1935 | 26 |
| 1936 | 45 |
| 1938 | 7 |
| 1939 | 7 |
| 1940 | 15 |
| 1941 | 11 |
| 1942 | 22 |
| 1943 | 37 |
| 1944 | 34 |
| 1945 | 13 |
| 1946 | 34 |
| 1947 | 29 |
| 1948 | 29 |
| 1949 | 3 |
| 1950 | 25 |
| 1951 | 33 |
| 1952 | 28 |
| 1953 | 28 |
| 1954 | 19 |
| 1955 | 17 |
| 1956 | 47 |
| 1957 | 35 |
| 1958 | 18 |
| 1959 | 18 |
| 1960 | 15 |
| 1961 | 30 |
| 1962 | 28 |
| 1963 | 23 |
| 1964 | 39 |
| 1965 | 28 |
| 1966 | 6 |
| 1967 | 23 |
| 1968 | 12 |
| 1969 | 28 |
| 1970 | 23 |
| 1971 | 17 |
| 1972 | 14 |
| 1973 | 9 |
| 1974 | 28 |
| 2000 | 16 |
| 2001 | 12 |
| 2002 | 13 |
| 2003 | 36 |
| 2004 | 23 |
| 2005 | 26 |
| 2006 | 15 |
| 2007 | 13 |
| 2008 | 21 |
| 2009 | 21 |
| 2010 | 25 |
| 2011 | 14 |
| 2012 | 22 |
| 2013 | 54 |
| 2014 | 20 |
| 2015 | 26 |
| 2016 | 17 |
| 2017 | 21 |
| 2018 | 10 |
| 2019 | 21 |
| 2020 | 32 |
| 2021 | 23 |
| 2022 | 15 |
| 2023 | 7 |
| 2024 | 15 |
| 2025 | 23 |
| 2026 | 20 |
All-Time Record Progression
10 new records| Date | Kind | Detail |
|---|---|---|
| 2020-01-30 | Record snow depth | Record snow depth 73.7 cm (29.0 in) |
| 2020-02-10 | Record snow depth | Record snow depth 78.7 cm (31.0 in) |
| 2021-12-30 | Record snow depth | Record snow depth 81.3 cm (32.0 in) |
| 2022-01-14 | Record snow depth | Record snow depth 83.8 cm (33.0 in) |
| 2022-01-22 | Record snow depth | Record snow depth 88.9 cm (35.0 in) |
| 2022-02-06 | Record snow depth | Record snow depth 91.4 cm (36.0 in) |
| 2022-02-09 | Record snow depth | Record snow depth 101.6 cm (40.0 in) |
| 2022-02-18 | Record snow depth | Record snow depth 104.1 cm (41.0 in) |
| 2022-02-19 | Record snow depth | Record snow depth 106.7 cm (42.0 in) |
| 2022-03-10 | Record snow depth | Record snow depth 111.8 cm (44.0 in) |
Wettest Day of Each Month
Oct: 54.9 mm (2.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 15.2 mm (0.6 in) | 8 January 1958 |
| Feb | 11.7 mm (0.5 in) | 24 February 2015 |
| Mar | 6.9 mm (0.27 in) | 1 March 1971 |
| Apr | 33.0 mm (1.3 in) | 1 April 2021 |
| May | 29.0 mm (1.1 in) | 31 May 2023 |
| Jun | 52.8 mm (2.1 in) | 26 June 1955 |
| Jul | 50.5 mm (2.0 in) | 30 July 1958 |
| Aug | 49.8 mm (2.0 in) | 14 August 2017 |
| Sep | 30.0 mm (1.2 in) | 1 September 2003 |
| Oct | 54.9 mm (2.2 in) | 10 October 1938 |
| Nov | 22.9 mm (0.9 in) | 17 November 2017 |
| Dec | 10.9 mm (0.4 in) | 29 December 1955 |
Period of Record Coverage
1935 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1935 | 149 | 41% | No |
| 1936 | 330 | 90% | Yes |
| 1938 | 61 | 17% | No |
| 1939 | 62 | 17% | No |
| 1940 | 84 | 23% | No |
| 1941 | 318 | 87% | No |
| 1942 | 341 | 93% | Yes |
| 1943 | 347 | 95% | Yes |
| 1944 | 361 | 99% | Yes |
| 1945 | 355 | 97% | Yes |
| 1946 | 360 | 99% | Yes |
| 1947 | 362 | 99% | Yes |
| 1948 | 364 | 99% | Yes |
| 1949 | 120 | 33% | No |
| 1950 | 364 | 100% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 364 | 99% | Yes |
| 1953 | 361 | 99% | Yes |
| 1954 | 351 | 96% | Yes |
| 1955 | 351 | 96% | Yes |
| 1956 | 361 | 99% | Yes |
| 1957 | 363 | 99% | Yes |
| 1958 | 364 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 364 | 99% | Yes |
| 1961 | 353 | 97% | Yes |
| 1962 | 311 | 85% | No |
| 1963 | 362 | 99% | Yes |
| 1964 | 350 | 96% | Yes |
| 1965 | 249 | 68% | No |
| 1966 | 160 | 44% | No |
| 1967 | 362 | 99% | Yes |
| 1968 | 350 | 96% | Yes |
| 1969 | 344 | 94% | Yes |
| 1970 | 362 | 99% | Yes |
| 1971 | 340 | 93% | Yes |
| 1972 | 361 | 99% | Yes |
| 1973 | 362 | 99% | Yes |
| 1974 | 304 | 83% | No |
| 2000 | 222 | 61% | No |
| 2001 | 265 | 73% | No |
| 2002 | 226 | 62% | No |
| 2003 | 331 | 91% | Yes |
| 2004 | 296 | 81% | No |
| 2005 | 171 | 47% | No |
| 2006 | 285 | 78% | No |
| 2007 | 308 | 84% | No |
| 2008 | 307 | 84% | No |
| 2009 | 279 | 76% | No |
| 2010 | 358 | 98% | Yes |
| 2011 | 360 | 99% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 357 | 98% | Yes |
| 2014 | 362 | 99% | Yes |
| 2015 | 362 | 99% | Yes |
| 2016 | 361 | 99% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 364 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 362 | 99% | Yes |
| 2021 | 364 | 100% | Yes |
| 2022 | 362 | 99% | Yes |
| 2023 | 361 | 99% | Yes |
| 2024 | 362 | 99% | Yes |
| 2025 | 361 | 99% | Yes |
| 2026 | 279 | 76% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 12 September 2026 | Circle Hot Springs, US | daily high min (Provisional) | 10.6 C (51.1 F) | 1.7 C (3.1 F) | 69 years | 32 of 100 (Routine) |
| 11 September 2026 | Circle Hot Springs, US | daily high min (Provisional) | 8.3 C (46.9 F) | 1.6 C (2.9 F) | 76 years | 34 of 100 (Routine) |
| 22 August 2026 | Circle Hot Springs, US | daily rain (Provisional) | 27.2 mm (1.1 in) | 8.9 mm (0.35 in) | 52 years | 39 of 100 (Notable) |
| 4 August 2026 | Circle Hot Springs, US | daily rain | 18.8 mm (0.7 in) | 4.1 mm (0.16 in) | 52 years | 20 of 100 (Routine) |
| 29 July 2026 | Circle Hot Springs, US | daily low min | -2.2 C (28.0 F) | 1.6 C (2.9 F) | 4 years | 14 of 100 (Routine) |
| 29 July 2026 | Circle Hot Springs, US | daily low max | 13.3 C (55.9 F) | 0.6 C (1.1 F) | 12 years | 13 of 100 (Routine) |
| 28 July 2026 | Circle Hot Springs, US | daily low max | 12.2 C (54.0 F) | 1.1 C (2.0 F) | 12 years | 14 of 100 (Routine) |
| 25 July 2026 | Circle Hot Springs, US | daily low max | 11.7 C (53.1 F) | 1.1 C (2.0 F) | 56 years | 28 of 100 (Routine) |
| 25 July 2026 | Circle Hot Springs, US | daily low min | -1.7 C (28.9 F) | 1.1 C (2.0 F) | 20 years | 18 of 100 (Routine) |
| 21 July 2026 | Circle Hot Springs, US | daily high max | 29.4 C (84.9 F) | 0.5 C (0.9 F) | 71 years | 31 of 100 (Routine) |
| 16 July 2026 | Circle Hot Springs, US | daily low max | 13.3 C (55.9 F) | 1.1 C (2.0 F) | 1 year | 11 of 100 (Routine) |
| 30 May 2026 | Circle Hot Springs, US | daily low max | 7.8 C (46.0 F) | 1.1 C (2.0 F) | 4 years | 11 of 100 (Routine) |
| 9 May 2026 | Circle Hot Springs, US | daily rain | 8.9 mm (0.35 in) | 3.1 mm (0.12 in) | 80 years | 20 of 100 (Routine) |
| 2 May 2026 | Circle Hot Springs, US | daily high min | 2.8 C (37.0 F) | 0.6 C (1.1 F) | 16 years | 14 of 100 (Routine) |
| 29 April 2026 | Circle Hot Springs, US | daily high min (Tie) | 3.3 C (37.9 F) | tie | 24 years | 4 of 100 (Routine) |
| 20 April 2026 | Circle Hot Springs, US | daily low max | -8.9 C (16.0 F) | 3.9 C (7.0 F) | 64 years | 33 of 100 (Routine) |
| 22 March 2026 | Circle Hot Springs, US | daily low min (Tie) | -36.7 C (-34.1 F) | tie | 24 years | 4 of 100 (Routine) |
| 21 March 2026 | Circle Hot Springs, US | daily low min | -37.2 C (-35.0 F) | 1.1 C (2.0 F) | 85 years | 35 of 100 (Notable) |
| 21 March 2026 | Circle Hot Springs, US | daily low max | -20.6 C (-5.1 F) | 0.6 C (1.1 F) | 84 years | 34 of 100 (Routine) |
| 20 March 2026 | Circle Hot Springs, US | daily low max | -20.6 C (-5.1 F) | 0.6 C (1.1 F) | 16 years | 14 of 100 (Routine) |
Climate Trend
40 complete years, 1944 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1944 | -3.5 C | +2.12 C |
| 1945 | -5.3 C | +0.37 C |
| 1946 | -6.3 C | -0.66 C |
| 1947 | -5.1 C | +0.52 C |
| 1948 | -6.5 C | -0.81 C |
| 1950 | -4.9 C | +0.80 C |
| 1951 | -6.2 C | -0.55 C |
| 1952 | -5.9 C | -0.21 C |
| 1953 | -5.2 C | +0.41 C |
| 1955 | -6.5 C | -0.87 C |
| 1956 | -7.4 C | -1.72 C |
| 1957 | -4.0 C | +1.66 C |
| 1958 | -5.9 C | -0.25 C |
| 1959 | -6.7 C | -1.07 C |
| 1960 | -5.7 C | -0.09 C |
| 1961 | -7.4 C | -1.71 C |
| 1963 | -5.1 C | +0.56 C |
| 1964 | -6.8 C | -1.11 C |
| 1967 | -4.6 C | +1.07 C |
| 1968 | -4.9 C | +0.73 C |
| 1970 | -5.8 C | -0.19 C |
| 1972 | -6.9 C | -1.23 C |
| 1973 | -6.3 C | -0.62 C |
| 2003 | -5.6 C | +0.02 C |
| 2010 | -6.0 C | -0.30 C |
| 2011 | -6.1 C | -0.47 C |
| 2012 | -8.1 C | -2.47 C |
| 2013 | -6.1 C | -0.44 C |
| 2014 | -5.5 C | +0.19 C |
| 2015 | -4.6 C | +1.02 C |
| 2016 | -4.8 C | +0.81 C |
| 2017 | -4.4 C | +1.22 C |
| 2018 | -4.9 C | +0.74 C |
| 2019 | -3.9 C | +1.77 C |
| 2020 | -6.5 C | -0.82 C |
| 2021 | -6.6 C | -0.97 C |
| 2022 | -6.0 C | -0.33 C |
| 2023 | -4.4 C | +1.29 C |
| 2024 | -5.2 C | +0.45 C |
| 2025 | -4.4 C | +1.23 C |
The fitted trend in annual mean temperature here over 1944 to 2025 is 0.04 C (-0.07 to 0.15) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.3) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.04 C (-0.07 to 0.15) per decade | 0.1 F (-0.1 to 0.3) per decade | 1944 to 2025 | 40 | Not clearly different from zero |
| Mean daily maximum | 0.14 C (0.03 to 0.26) per decade | 0.3 F (0.1 to 0.5) per decade | 1944 to 2025 | 40 | Rise |
| Mean daily minimum | -0.1 C (-0.2 to 0.1) per decade | -0.1 F (-0.3 to 0.1) per decade | 1944 to 2025 | 40 | Not clearly different from zero |
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
1935 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 34.4 C (93.9 F) | 1955 | 29.4 C (84.9 F) | 66 |
| Coldest night (TNn) | -51.1 C (-60.0 F) | 1946 | -46.1 C (-51.0 F) | 66 |
| Wettest day (Rx1day) | 54.9 mm (2.2 in) | 1938 | 21.1 mm (0.8 in) | 67 |
| Wettest five days (Rx5day) | 109.2 mm (4.3 in) | 1967 | 35.3 mm (1.4 in) | 66 |
| Longest dry spell (CDD) | 94 days | 1936 | 35 days | 66 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1935 | 28.9 C (84.0 F) |
| 1936 | 32.2 C (90.0 F) |
| 1937 | n/a |
| 1938 | 17.2 C (63.0 F) |
| 1939 | 17.2 C (63.0 F) |
| 1940 | 2.8 C (37.0 F) |
| 1941 | 32.8 C (91.0 F) |
| 1942 | 30.0 C (86.0 F) |
| 1943 | 28.3 C (82.9 F) |
| 1944 | 29.4 C (84.9 F) |
| 1945 | 26.1 C (79.0 F) |
| 1946 | 30.6 C (87.1 F) |
| 1947 | 30.6 C (87.1 F) |
| 1948 | 30.6 C (87.1 F) |
| 1949 | 25.6 C (78.1 F) |
| 1950 | 31.1 C (88.0 F) |
| 1951 | 32.2 C (90.0 F) |
| 1952 | 28.3 C (82.9 F) |
| 1953 | 30.6 C (87.1 F) |
| 1954 | 29.4 C (84.9 F) |
| 1955 | 34.4 C (93.9 F) |
| 1956 | 28.9 C (84.0 F) |
| 1957 | 30.0 C (86.0 F) |
| 1958 | 33.9 C (93.0 F) |
| 1959 | 28.3 C (82.9 F) |
| 1960 | 32.2 C (90.0 F) |
| 1961 | 29.4 C (84.9 F) |
| 1962 | 29.4 C (84.9 F) |
| 1963 | 27.2 C (81.0 F) |
| 1964 | 27.2 C (81.0 F) |
| 1965 | 25.6 C (78.1 F) |
| 1966 | 27.2 C (81.0 F) |
| 1967 | 30.6 C (87.1 F) |
| 1968 | 27.8 C (82.0 F) |
| 1969 | 30.6 C (87.1 F) |
| 1970 | 25.6 C (78.1 F) |
| 1971 | 27.8 C (82.0 F) |
| 1972 | 28.9 C (84.0 F) |
| 1973 | 27.2 C (81.0 F) |
| 1974 | 27.2 C (81.0 F) |
| 2000 | 34.4 C (93.9 F) |
| 2001 | 29.4 C (84.9 F) |
| 2002 | 26.7 C (80.1 F) |
| 2003 | 32.2 C (90.0 F) |
| 2004 | 32.2 C (90.0 F) |
| 2005 | 30.0 C (86.0 F) |
| 2006 | 27.8 C (82.0 F) |
| 2007 | 27.8 C (82.0 F) |
| 2008 | 27.8 C (82.0 F) |
| 2009 | 32.2 C (90.0 F) |
| 2010 | 31.1 C (88.0 F) |
| 2011 | 28.9 C (84.0 F) |
| 2012 | 29.4 C (84.9 F) |
| 2013 | 30.6 C (87.1 F) |
| 2014 | 27.8 C (82.0 F) |
| 2015 | 30.0 C (86.0 F) |
| 2016 | 30.6 C (87.1 F) |
| 2017 | 28.9 C (84.0 F) |
| 2018 | 32.2 C (90.0 F) |
| 2019 | 31.1 C (88.0 F) |
| 2020 | 25.0 C (77.0 F) |
| 2021 | 28.9 C (84.0 F) |
| 2022 | 29.4 C (84.9 F) |
| 2023 | 30.0 C (86.0 F) |
| 2024 | 31.1 C (88.0 F) |
| 2025 | 30.0 C (86.0 F) |
| 2026 | 29.4 C (84.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1935 | -40.0 C (-40.0 F) |
| 1936 | -46.1 C (-51.0 F) |
| 1937 | n/a |
| 1938 | -40.0 C (-40.0 F) |
| 1939 | -39.4 C (-38.9 F) |
| 1940 | -41.1 C (-42.0 F) |
| 1941 | -46.1 C (-51.0 F) |
| 1942 | -45.0 C (-49.0 F) |
| 1943 | -46.1 C (-51.0 F) |
| 1944 | -42.8 C (-45.0 F) |
| 1945 | -41.7 C (-43.1 F) |
| 1946 | -51.1 C (-60.0 F) |
| 1947 | -50.0 C (-58.0 F) |
| 1948 | -47.2 C (-53.0 F) |
| 1949 | -46.7 C (-52.1 F) |
| 1950 | -49.4 C (-56.9 F) |
| 1951 | -51.1 C (-60.0 F) |
| 1952 | -51.1 C (-60.0 F) |
| 1953 | -47.2 C (-53.0 F) |
| 1954 | -47.2 C (-53.0 F) |
| 1955 | -45.6 C (-50.1 F) |
| 1956 | -46.7 C (-52.1 F) |
| 1957 | -45.6 C (-50.1 F) |
| 1958 | -43.3 C (-45.9 F) |
| 1959 | -46.7 C (-52.1 F) |
| 1960 | -44.4 C (-47.9 F) |
| 1961 | -51.1 C (-60.0 F) |
| 1962 | -47.8 C (-54.0 F) |
| 1963 | -46.1 C (-51.0 F) |
| 1964 | -48.3 C (-54.9 F) |
| 1965 | -49.4 C (-56.9 F) |
| 1966 | -46.1 C (-51.0 F) |
| 1967 | -43.3 C (-45.9 F) |
| 1968 | -48.9 C (-56.0 F) |
| 1969 | -48.9 C (-56.0 F) |
| 1970 | -43.3 C (-45.9 F) |
| 1971 | -51.1 C (-60.0 F) |
| 1972 | -46.1 C (-51.0 F) |
| 1973 | -50.0 C (-58.0 F) |
| 1974 | -44.4 C (-47.9 F) |
| 2000 | -40.6 C (-41.1 F) |
| 2001 | -38.9 C (-38.0 F) |
| 2002 | -42.8 C (-45.0 F) |
| 2003 | -41.1 C (-42.0 F) |
| 2004 | -48.3 C (-54.9 F) |
| 2005 | -47.8 C (-54.0 F) |
| 2006 | -47.2 C (-53.0 F) |
| 2007 | -46.1 C (-51.0 F) |
| 2008 | -48.3 C (-54.9 F) |
| 2009 | -48.9 C (-56.0 F) |
| 2010 | -48.3 C (-54.9 F) |
| 2011 | -47.2 C (-53.0 F) |
| 2012 | -50.0 C (-58.0 F) |
| 2013 | -46.7 C (-52.1 F) |
| 2014 | -45.0 C (-49.0 F) |
| 2015 | -46.7 C (-52.1 F) |
| 2016 | -42.2 C (-44.0 F) |
| 2017 | -43.3 C (-45.9 F) |
| 2018 | -40.0 C (-40.0 F) |
| 2019 | -43.3 C (-45.9 F) |
| 2020 | -45.6 C (-50.1 F) |
| 2021 | -47.8 C (-54.0 F) |
| 2022 | -47.8 C (-54.0 F) |
| 2023 | -37.2 C (-35.0 F) |
| 2024 | -45.6 C (-50.1 F) |
| 2025 | -46.1 C (-51.0 F) |
| 2026 | -48.9 C (-56.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1935 | 17.0 mm (0.7 in) |
| 1936 | 21.1 mm (0.8 in) |
| 1937 | 12.7 mm (0.5 in) |
| 1938 | 54.9 mm (2.2 in) |
| 1939 | 54.9 mm (2.2 in) |
| 1940 | 24.1 mm (0.9 in) |
| 1941 | 14.0 mm (0.6 in) |
| 1942 | 21.8 mm (0.9 in) |
| 1943 | 27.7 mm (1.1 in) |
| 1944 | 41.1 mm (1.6 in) |
| 1945 | 27.7 mm (1.1 in) |
| 1946 | 15.7 mm (0.6 in) |
| 1947 | 12.7 mm (0.5 in) |
| 1948 | 17.0 mm (0.7 in) |
| 1949 | 9.7 mm (0.38 in) |
| 1950 | 24.9 mm (1.0 in) |
| 1951 | 21.1 mm (0.8 in) |
| 1952 | 19.6 mm (0.8 in) |
| 1953 | 17.3 mm (0.7 in) |
| 1954 | 15.5 mm (0.6 in) |
| 1955 | 52.8 mm (2.1 in) |
| 1956 | 19.3 mm (0.8 in) |
| 1957 | 15.7 mm (0.6 in) |
| 1958 | 50.5 mm (2.0 in) |
| 1959 | 16.3 mm (0.6 in) |
| 1960 | 27.2 mm (1.1 in) |
| 1961 | 26.9 mm (1.1 in) |
| 1962 | 15.7 mm (0.6 in) |
| 1963 | 10.7 mm (0.4 in) |
| 1964 | 35.8 mm (1.4 in) |
| 1965 | 19.6 mm (0.8 in) |
| 1966 | 4.3 mm (0.17 in) |
| 1967 | 42.2 mm (1.7 in) |
| 1968 | 25.1 mm (1.0 in) |
| 1969 | 13.7 mm (0.5 in) |
| 1970 | 18.3 mm (0.7 in) |
| 1971 | 29.0 mm (1.1 in) |
| 1972 | 15.0 mm (0.6 in) |
| 1973 | 27.9 mm (1.1 in) |
| 1974 | 14.7 mm (0.6 in) |
| 2000 | 17.5 mm (0.7 in) |
| 2001 | 17.8 mm (0.7 in) |
| 2002 | 18.0 mm (0.7 in) |
| 2003 | 30.0 mm (1.2 in) |
| 2004 | 8.4 mm (0.33 in) |
| 2005 | 30.5 mm (1.2 in) |
| 2006 | 13.5 mm (0.5 in) |
| 2007 | 45.7 mm (1.8 in) |
| 2008 | 15.2 mm (0.6 in) |
| 2009 | 14.0 mm (0.6 in) |
| 2010 | 24.6 mm (1.0 in) |
| 2011 | 25.4 mm (1.0 in) |
| 2012 | 22.9 mm (0.9 in) |
| 2013 | 21.8 mm (0.9 in) |
| 2014 | 19.6 mm (0.8 in) |
| 2015 | 25.4 mm (1.0 in) |
| 2016 | 22.9 mm (0.9 in) |
| 2017 | 49.8 mm (2.0 in) |
| 2018 | 33.0 mm (1.3 in) |
| 2019 | 25.4 mm (1.0 in) |
| 2020 | 20.8 mm (0.8 in) |
| 2021 | 40.6 mm (1.6 in) |
| 2022 | 16.3 mm (0.6 in) |
| 2023 | 29.0 mm (1.1 in) |
| 2024 | 18.0 mm (0.7 in) |
| 2025 | 25.4 mm (1.0 in) |
| 2026 | 27.2 mm (1.1 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1935 | 33.0 mm (1.3 in) |
| 1936 | 35.5 mm (1.4 in) |
| 1937 | 19.1 mm (0.8 in) |
| 1938 | n/a |
| 1939 | 13.2 mm (0.5 in) |
| 1940 | 39.9 mm (1.6 in) |
| 1941 | 33.3 mm (1.3 in) |
| 1942 | 29.0 mm (1.1 in) |
| 1943 | 42.4 mm (1.7 in) |
| 1944 | 49.5 mm (1.9 in) |
| 1945 | 32.1 mm (1.3 in) |
| 1946 | 27.9 mm (1.1 in) |
| 1947 | 32.7 mm (1.3 in) |
| 1948 | 23.6 mm (0.9 in) |
| 1949 | 12.7 mm (0.5 in) |
| 1950 | 63.0 mm (2.5 in) |
| 1951 | 31.5 mm (1.2 in) |
| 1952 | 37.9 mm (1.5 in) |
| 1953 | 30.3 mm (1.2 in) |
| 1954 | 27.3 mm (1.1 in) |
| 1955 | 87.8 mm (3.5 in) |
| 1956 | 38.3 mm (1.5 in) |
| 1957 | 30.9 mm (1.2 in) |
| 1958 | 60.4 mm (2.4 in) |
| 1959 | 24.9 mm (1.0 in) |
| 1960 | 55.9 mm (2.2 in) |
| 1961 | 57.7 mm (2.3 in) |
| 1962 | 29.3 mm (1.2 in) |
| 1963 | 27.4 mm (1.1 in) |
| 1964 | 55.1 mm (2.2 in) |
| 1965 | 35.1 mm (1.4 in) |
| 1966 | 10.4 mm (0.4 in) |
| 1967 | 109.2 mm (4.3 in) |
| 1968 | 57.6 mm (2.3 in) |
| 1969 | 31.5 mm (1.2 in) |
| 1970 | 44.8 mm (1.8 in) |
| 1971 | 32.6 mm (1.3 in) |
| 1972 | 29.7 mm (1.2 in) |
| 1973 | 54.1 mm (2.1 in) |
| 1974 | 23.3 mm (0.9 in) |
| 2000 | 37.0 mm (1.5 in) |
| 2001 | 37.5 mm (1.5 in) |
| 2002 | 21.3 mm (0.8 in) |
| 2003 | 45.0 mm (1.8 in) |
| 2004 | 13.8 mm (0.5 in) |
| 2005 | 35.6 mm (1.4 in) |
| 2006 | 29.8 mm (1.2 in) |
| 2007 | 83.1 mm (3.3 in) |
| 2008 | 29.2 mm (1.1 in) |
| 2009 | 27.8 mm (1.1 in) |
| 2010 | 24.6 mm (1.0 in) |
| 2011 | 50.0 mm (2.0 in) |
| 2012 | 47.0 mm (1.9 in) |
| 2013 | 41.6 mm (1.6 in) |
| 2014 | 39.4 mm (1.6 in) |
| 2015 | 55.9 mm (2.2 in) |
| 2016 | 49.4 mm (1.9 in) |
| 2017 | 88.9 mm (3.5 in) |
| 2018 | 39.9 mm (1.6 in) |
| 2019 | 38.9 mm (1.5 in) |
| 2020 | 42.7 mm (1.7 in) |
| 2021 | 40.6 mm (1.6 in) |
| 2022 | 26.7 mm (1.1 in) |
| 2023 | 34.1 mm (1.3 in) |
| 2024 | 30.7 mm (1.2 in) |
| 2025 | 30.5 mm (1.2 in) |
| 2026 | 44.7 mm (1.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1935 | 22 days |
| 1936 | 94 days |
| 1937 | 48 days |
| 1938 | n/a |
| 1939 | 33 days |
| 1940 | 59 days |
| 1941 | 42 days |
| 1942 | 36 days |
| 1943 | 40 days |
| 1944 | 24 days |
| 1945 | 17 days |
| 1946 | 32 days |
| 1947 | 30 days |
| 1948 | 18 days |
| 1949 | 18 days |
| 1950 | 29 days |
| 1951 | 29 days |
| 1952 | 60 days |
| 1953 | 51 days |
| 1954 | 40 days |
| 1955 | 34 days |
| 1956 | 31 days |
| 1957 | 23 days |
| 1958 | 27 days |
| 1959 | 35 days |
| 1960 | 40 days |
| 1961 | 27 days |
| 1962 | 27 days |
| 1963 | 36 days |
| 1964 | 29 days |
| 1965 | 34 days |
| 1966 | 24 days |
| 1967 | 25 days |
| 1968 | 44 days |
| 1969 | 48 days |
| 1970 | 28 days |
| 1971 | 28 days |
| 1972 | 32 days |
| 1973 | 35 days |
| 1974 | 25 days |
| 2000 | 23 days |
| 2001 | 29 days |
| 2002 | 54 days |
| 2003 | 48 days |
| 2004 | 34 days |
| 2005 | 26 days |
| 2006 | 15 days |
| 2007 | 48 days |
| 2008 | 31 days |
| 2009 | 37 days |
| 2010 | 48 days |
| 2011 | 52 days |
| 2012 | 51 days |
| 2013 | 37 days |
| 2014 | 53 days |
| 2015 | 55 days |
| 2016 | 39 days |
| 2017 | 50 days |
| 2018 | 41 days |
| 2019 | 42 days |
| 2020 | 40 days |
| 2021 | 34 days |
| 2022 | 45 days |
| 2023 | 30 days |
| 2024 | 35 days |
| 2025 | 30 days |
| 2026 | 36 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
40 years with a frostAcross 40 years with a frost, the median last spring frost at Circle Hot Springs falls on 4 June and the median first autumn frost on 18 August, which leaves a median of 75 days between them.
Fitted over all years, the growing season changes by -3.9 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1956 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 4 June | n/a | 5 June | n/a | +2.0 days per decade |
| First autumn frost | 18 August | n/a | 18 August | n/a | -1.9 days per decade |
| Growing days | 75 days | n/a | 74 days | n/a | -3.9 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
45 years, 1936 to 2025A day with at least 23.1 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 62.6 mm (2.5 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 23.1 mm (0.9 in) | |
| 5 years | 31.6 mm (1.2 in) | |
| 10 years | 38.1 mm (1.5 in) | |
| 25 years | 47.1 mm (1.9 in) | |
| 50 years | 54.5 mm (2.1 in) | Longer than the 45 years of record |
| 100 years | 62.6 mm (2.5 in) | Longer than the 45 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, 45 years of values from 1936 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: 52.8 mm (2.1 in) in 1955; 50.5 mm (2.0 in) in 1958; 49.8 mm (2.0 in) in 2017.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Circle Hot Springs, at 2003. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2003 ran 1.7 C (3.0 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 2003 | -1.7 | -3.0 | 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.
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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-13).