Eureka Rs Weather Records (USC00242827)
Record envelope, standing records and threshold days for Eureka Rs (USC00242827), Montana, United States, with 66 years of record.
Key Facts for Eureka Rs
- Eureka Rs (USC00242827) is a weather station in Montana, United States at 48.90 latitude and -115.06 longitude, 772 m (2,532 ft) above sea level.
- The station reports from 1960 to 2025, 66 years of record.
- 1,464 records set at Eureka Rs still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Eureka Rs set a daily record high minimum temperature of 13.9 C (57.0 F) on 15 September 2025.
About the Station
- Location: Montana, United States, 48.90 latitude, -115.06 longitude.
- Elevation: 772 m (2,532 ft).
- Period of record: 1960 to 2025, 66 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
7 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 17.2 C (63.0 F) | -37.2 C (-35.0 F) | 7.8 C (46.0 F) | -19.4 C (-2.9 F) |
| Feb | 18.9 C (66.0 F) | -34.4 C (-29.9 F) | 12.8 C (55.0 F) | -25.6 C (-14.1 F) |
| Mar | 25.6 C (78.1 F) | -30.6 C (-23.1 F) | 24.4 C (75.9 F) | -4.4 C (24.1 F) |
| Apr | 31.7 C (89.1 F) | -13.3 C (8.1 F) | 23.3 C (73.9 F) | -7.2 C (19.0 F) |
| May | 34.4 C (93.9 F) | -5.6 C (21.9 F) | 33.9 C (93.0 F) | 0.6 C (33.1 F) |
| Jun | 41.1 C (106.0 F) | -2.8 C (27.0 F) | 35.6 C (96.1 F) | 3.9 C (39.0 F) |
| Jul | 40.6 C (105.1 F) | -1.1 C (30.0 F) | 35.6 C (96.1 F) | 6.7 C (44.1 F) |
| Aug | 41.1 C (106.0 F) | -1.1 C (30.0 F) | 34.4 C (93.9 F) | 7.8 C (46.0 F) |
| Sep | 36.7 C (98.1 F) | -7.8 C (18.0 F) | 35.6 C (96.1 F) | 3.9 C (39.0 F) |
| Oct | 30.0 C (86.0 F) | -17.8 C (0.0 F) | 18.9 C (66.0 F) | 3.3 C (37.9 F) |
| Nov | 20.0 C (68.0 F) | -30.6 C (-23.1 F) | n/a | n/a |
| Dec | 15.0 C (59.0 F) | -45.6 C (-50.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1960 | 12 |
| 1961 | 24 |
| 1962 | 36 |
| 1963 | 46 |
| 1964 | 30 |
| 1965 | 31 |
| 1966 | 27 |
| 1967 | 35 |
| 1968 | 30 |
| 1969 | 39 |
| 1970 | 20 |
| 1971 | 26 |
| 1972 | 53 |
| 1973 | 32 |
| 1974 | 22 |
| 1975 | 24 |
| 1976 | 10 |
| 1977 | 20 |
| 1978 | 7 |
| 1979 | 27 |
| 1980 | 15 |
| 1981 | 26 |
| 1982 | 12 |
| 1983 | 21 |
| 1984 | 26 |
| 1985 | 51 |
| 1986 | 29 |
| 1987 | 23 |
| 1988 | 22 |
| 1989 | 21 |
| 1990 | 17 |
| 1991 | 14 |
| 1992 | 19 |
| 1993 | 26 |
| 1994 | 14 |
| 1995 | 24 |
| 1996 | 26 |
| 1997 | 17 |
| 1998 | 10 |
| 1999 | 21 |
| 2000 | 10 |
| 2001 | 17 |
| 2002 | 32 |
| 2003 | 16 |
| 2004 | 13 |
| 2005 | 14 |
| 2006 | 20 |
| 2007 | 17 |
| 2008 | 19 |
| 2009 | 17 |
| 2010 | 5 |
| 2011 | 15 |
| 2012 | 16 |
| 2013 | 10 |
| 2014 | 21 |
| 2015 | 31 |
| 2016 | 12 |
| 2017 | 11 |
| 2018 | 15 |
| 2019 | 26 |
| 2020 | 18 |
| 2021 | 39 |
| 2022 | 22 |
| 2023 | 20 |
| 2024 | 27 |
| 2025 | 16 |
All-Time Record Progression
7 new records| Date | Kind | Detail |
|---|---|---|
| 1994-07-24 | Record high minimum temperature | Record high minimum temperature 21.1 C (70.0 F) |
| 1994-08-14 | Record high maximum temperature | Record high maximum temperature 40.6 C (105.1 F) |
| 2002-07-14 | Record high minimum temperature | Record high minimum temperature 22.2 C (72.0 F) |
| 2013-06-20 | Record daily precipitation | Record daily precipitation 43.4 mm (1.7 in) |
| 2018-08-10 | Record high maximum temperature | Record high maximum temperature 41.1 C (106.0 F) |
| 2019-09-09 | Record daily precipitation | Record daily precipitation 47.8 mm (1.9 in) |
| 2023-08-18 | Record high minimum temperature | Record high minimum temperature 23.3 C (73.9 F) |
Wettest Day of Each Month
Sep: 47.8 mm (1.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 17.5 mm (0.7 in) | 24 January 1981 |
| Feb | 22.1 mm (0.9 in) | 6 February 2017 |
| Mar | 18.8 mm (0.7 in) | 16 March 2015 |
| Apr | 26.2 mm (1.0 in) | 24 April 1998 |
| May | 38.1 mm (1.5 in) | 22 May 2002 |
| Jun | 43.4 mm (1.7 in) | 20 June 2013 |
| Jul | 32.8 mm (1.3 in) | 22 July 1987 |
| Aug | 45.5 mm (1.8 in) | 30 August 2023 |
| Sep | 47.8 mm (1.9 in) | 9 September 2019 |
| Oct | 25.7 mm (1.0 in) | 2 October 2018 |
| Nov | 29.2 mm (1.1 in) | 12 November 1989 |
| Dec | 36.6 mm (1.4 in) | 9 December 2015 |
Period of Record Coverage
1960 to 2025| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1960 | 214 | 58% | No |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 363 | 99% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 363 | 99% | Yes |
| 1969 | 362 | 99% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 365 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 364 | 100% | Yes |
| 1975 | 362 | 99% | Yes |
| 1976 | 365 | 100% | Yes |
| 1977 | 363 | 99% | Yes |
| 1978 | 347 | 95% | Yes |
| 1979 | 351 | 96% | Yes |
| 1980 | 328 | 90% | No |
| 1981 | 359 | 98% | Yes |
| 1982 | 353 | 97% | Yes |
| 1983 | 363 | 99% | Yes |
| 1984 | 360 | 98% | Yes |
| 1985 | 359 | 98% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 363 | 99% | Yes |
| 1993 | 362 | 99% | Yes |
| 1994 | 359 | 98% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 365 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 362 | 99% | Yes |
| 1999 | 364 | 100% | Yes |
| 2000 | 330 | 90% | Yes |
| 2001 | 354 | 97% | Yes |
| 2002 | 359 | 98% | Yes |
| 2003 | 364 | 100% | Yes |
| 2004 | 365 | 100% | Yes |
| 2005 | 364 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 363 | 99% | Yes |
| 2008 | 339 | 93% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 273 | 75% | No |
| 2014 | 181 | 50% | No |
| 2015 | 365 | 100% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 362 | 99% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 366 | 100% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 348 | 95% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 250 | 68% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 15 September 2025 | Eureka Rs, US | daily high min | 13.9 C (57.0 F) | 2.2 C (4.0 F) | 38 years | 22 of 100 (Routine) |
| 14 September 2025 | Eureka Rs, US | daily high min | 13.9 C (57.0 F) | 2.2 C (4.0 F) | 28 years | 19 of 100 (Routine) |
| 13 September 2025 | Eureka Rs, US | daily rain | 11.9 mm (0.5 in) | 7.8 mm (0.31 in) | 44 years | 20 of 100 (Routine) |
| 13 September 2025 | Eureka Rs, US | daily high min | 13.3 C (55.9 F) | 0.5 C (0.9 F) | 8 years | 9 of 100 (Routine) |
| 8 September 2025 | Eureka Rs, US | daily high min | 13.9 C (57.0 F) | 0.6 C (1.1 F) | 27 years | 15 of 100 (Routine) |
| 11 August 2025 | Eureka Rs, US | daily high min (Tie) | 18.9 C (66.0 F) | tie | 7 years | 2 of 100 (Routine) |
| 4 August 2025 | Eureka Rs, US | daily rain | 6.1 mm (0.24 in) | 2.3 mm (0.09 in) | 63 years | 20 of 100 (Routine) |
| 15 July 2025 | Eureka Rs, US | daily rain | 18.8 mm (0.7 in) | 8.4 mm (0.33 in) | 43 years | 20 of 100 (Routine) |
| 5 July 2025 | Eureka Rs, US | daily rain | 25.4 mm (1.0 in) | 5.6 mm (0.22 in) | 60 years | 34 of 100 (Routine) |
| 11 June 2025 | Eureka Rs, US | daily high max | 35.0 C (95.0 F) | 0.6 C (1.1 F) | 60 years | 25 of 100 (Routine) |
| 10 June 2025 | Eureka Rs, US | daily high max | 35.0 C (95.0 F) | 0.6 C (1.1 F) | 10 years | 10 of 100 (Routine) |
| 9 June 2025 | Eureka Rs, US | daily high max (Tie) | 35.6 C (96.1 F) | tie | 8 years | 2 of 100 (Routine) |
| 31 May 2025 | Eureka Rs, US | daily high max | 33.9 C (93.0 F) | 1.1 C (2.0 F) | 39 years | 19 of 100 (Routine) |
| 12 May 2025 | Eureka Rs, US | daily rain | 11.7 mm (0.5 in) | 4.1 mm (0.16 in) | 34 years | 20 of 100 (Routine) |
| 11 May 2025 | Eureka Rs, US | daily high min | 12.8 C (55.0 F) | 3.9 C (7.0 F) | 48 years | 30 of 100 (Routine) |
| 8 May 2025 | Eureka Rs, US | daily high min (Tie) | 11.1 C (52.0 F) | tie | 8 years | 2 of 100 (Routine) |
| 8 April 2025 | Eureka Rs, US | daily high min (Tie) | 6.1 C (43.0 F) | tie | 2 years | 1 of 100 (Routine) |
| 1 April 2025 | Eureka Rs, US | daily rain | 22.1 mm (0.9 in) | 4.6 mm (0.18 in) | 48 years | 20 of 100 (Routine) |
| 28 March 2025 | Eureka Rs, US | daily high min | 8.9 C (48.0 F) | 0.6 C (1.1 F) | 10 years | 10 of 100 (Routine) |
| 27 March 2025 | Eureka Rs, US | monthly high min | 9.4 C (48.9 F) | 1.1 C (2.0 F) | 38 years | 29 of 100 (Routine) |
Climate Trend
60 complete years, 1961 to 2024| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1961 | 7.3 C | -0.37 C |
| 1962 | 7.0 C | -0.74 C |
| 1963 | 7.4 C | -0.32 C |
| 1964 | 6.6 C | -1.08 C |
| 1965 | 7.0 C | -0.71 C |
| 1966 | 7.7 C | -0.02 C |
| 1967 | 8.2 C | +0.47 C |
| 1968 | 7.1 C | -0.64 C |
| 1969 | 6.5 C | -1.15 C |
| 1970 | 6.5 C | -1.15 C |
| 1971 | 7.0 C | -0.72 C |
| 1972 | 6.2 C | -1.50 C |
| 1973 | 7.3 C | -0.41 C |
| 1974 | 8.2 C | +0.54 C |
| 1975 | 6.6 C | -1.10 C |
| 1976 | 7.9 C | +0.18 C |
| 1977 | 6.3 C | -1.37 C |
| 1978 | 6.5 C | -1.23 C |
| 1979 | 6.9 C | -0.79 C |
| 1981 | 7.4 C | -0.32 C |
| 1982 | 6.9 C | -0.82 C |
| 1983 | 7.2 C | -0.54 C |
| 1984 | 7.2 C | -0.49 C |
| 1985 | 5.7 C | -1.98 C |
| 1986 | 7.7 C | -0.03 C |
| 1987 | 8.5 C | +0.83 C |
| 1988 | 8.1 C | +0.43 C |
| 1989 | 7.2 C | -0.52 C |
| 1990 | 7.7 C | +0.01 C |
| 1991 | 7.6 C | -0.09 C |
| 1992 | 8.8 C | +1.12 C |
| 1993 | 6.5 C | -1.24 C |
| 1994 | 8.7 C | +0.96 C |
| 1995 | 8.1 C | +0.41 C |
| 1996 | 5.7 C | -2.01 C |
| 1997 | 7.4 C | -0.34 C |
| 1998 | 8.9 C | +1.21 C |
| 1999 | 9.1 C | +1.37 C |
| 2001 | 8.0 C | +0.32 C |
| 2002 | 7.1 C | -0.59 C |
| 2003 | 8.4 C | +0.68 C |
| 2004 | 8.7 C | +0.96 C |
| 2005 | 6.4 C | -1.31 C |
| 2006 | 7.8 C | +0.13 C |
| 2007 | 8.4 C | +0.74 C |
| 2008 | 7.6 C | -0.09 C |
| 2009 | 7.5 C | -0.20 C |
| 2010 | 8.0 C | +0.31 C |
| 2011 | 8.2 C | +0.46 C |
| 2012 | 8.7 C | +1.03 C |
| 2015 | 9.9 C | +2.18 C |
| 2016 | 9.3 C | +1.63 C |
| 2017 | 7.9 C | +0.25 C |
| 2018 | 8.4 C | +0.75 C |
| 2019 | 7.8 C | +0.12 C |
| 2020 | 9.2 C | +1.50 C |
| 2021 | 9.4 C | +1.73 C |
| 2022 | 7.9 C | +0.17 C |
| 2023 | 9.6 C | +1.88 C |
| 2024 | 9.5 C | +1.79 C |
The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1961 to 2024. 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 | 1961 to 2024 | 60 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.1 to 0.6) per decade | 1961 to 2024 | 60 | Rise |
| Mean daily minimum | 0.4 C (0.3 to 0.5) per decade | 0.8 F (0.6 to 1.0) per decade | 1961 to 2024 | 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
1960 to 2025| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.1 C (106.0 F) | 2018 | 37.2 C (99.0 F) | 66 |
| Coldest night (TNn) | -45.6 C (-50.1 F) | 1968 | -28.9 C (-20.0 F) | 66 |
| Wettest day (Rx1day) | 47.8 mm (1.9 in) | 2019 | 25.1 mm (1.0 in) | 66 |
| Wettest five days (Rx5day) | 83.7 mm (3.3 in) | 1998 | 40.8 mm (1.6 in) | 66 |
| Longest dry spell (CDD) | 82 days | 2017 | 32 days | 66 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1960 | 39.4 C (102.9 F) |
| 1961 | 39.4 C (102.9 F) |
| 1962 | 36.1 C (97.0 F) |
| 1963 | 38.9 C (102.0 F) |
| 1964 | 37.2 C (99.0 F) |
| 1965 | 38.3 C (100.9 F) |
| 1966 | 36.7 C (98.1 F) |
| 1967 | 40.0 C (104.0 F) |
| 1968 | 36.1 C (97.0 F) |
| 1969 | 38.9 C (102.0 F) |
| 1970 | 37.2 C (99.0 F) |
| 1971 | 40.0 C (104.0 F) |
| 1972 | 37.2 C (99.0 F) |
| 1973 | 37.2 C (99.0 F) |
| 1974 | 36.1 C (97.0 F) |
| 1975 | 38.3 C (100.9 F) |
| 1976 | 35.0 C (95.0 F) |
| 1977 | 36.1 C (97.0 F) |
| 1978 | 35.6 C (96.1 F) |
| 1979 | 39.4 C (102.9 F) |
| 1980 | 34.4 C (93.9 F) |
| 1981 | 37.8 C (100.0 F) |
| 1982 | 36.1 C (97.0 F) |
| 1983 | 35.0 C (95.0 F) |
| 1984 | 38.3 C (100.9 F) |
| 1985 | 38.9 C (102.0 F) |
| 1986 | 35.6 C (96.1 F) |
| 1987 | 37.2 C (99.0 F) |
| 1988 | 37.2 C (99.0 F) |
| 1989 | 36.7 C (98.1 F) |
| 1990 | 36.7 C (98.1 F) |
| 1991 | 35.6 C (96.1 F) |
| 1992 | 37.8 C (100.0 F) |
| 1993 | 33.3 C (91.9 F) |
| 1994 | 40.6 C (105.1 F) |
| 1995 | 35.0 C (95.0 F) |
| 1996 | 36.1 C (97.0 F) |
| 1997 | 36.1 C (97.0 F) |
| 1998 | 37.8 C (100.0 F) |
| 1999 | 35.6 C (96.1 F) |
| 2000 | 37.8 C (100.0 F) |
| 2001 | 37.8 C (100.0 F) |
| 2002 | 40.0 C (104.0 F) |
| 2003 | 38.9 C (102.0 F) |
| 2004 | 37.8 C (100.0 F) |
| 2005 | 36.1 C (97.0 F) |
| 2006 | 40.6 C (105.1 F) |
| 2007 | 39.4 C (102.9 F) |
| 2008 | 37.8 C (100.0 F) |
| 2009 | 35.0 C (95.0 F) |
| 2010 | 35.0 C (95.0 F) |
| 2011 | 36.7 C (98.1 F) |
| 2012 | 34.4 C (93.9 F) |
| 2013 | 38.9 C (102.0 F) |
| 2014 | 36.1 C (97.0 F) |
| 2015 | 40.0 C (104.0 F) |
| 2016 | 35.6 C (96.1 F) |
| 2017 | 37.8 C (100.0 F) |
| 2018 | 41.1 C (106.0 F) |
| 2019 | 36.1 C (97.0 F) |
| 2020 | 37.8 C (100.0 F) |
| 2021 | 41.1 C (106.0 F) |
| 2022 | 37.8 C (100.0 F) |
| 2023 | 38.9 C (102.0 F) |
| 2024 | 38.3 C (100.9 F) |
| 2025 | 35.6 C (96.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1960 | -18.3 C (-0.9 F) |
| 1961 | -27.2 C (-17.0 F) |
| 1962 | -36.7 C (-34.1 F) |
| 1963 | -37.2 C (-35.0 F) |
| 1964 | -32.8 C (-27.0 F) |
| 1965 | -23.9 C (-11.0 F) |
| 1966 | -28.3 C (-18.9 F) |
| 1967 | -22.2 C (-8.0 F) |
| 1968 | -45.6 C (-50.1 F) |
| 1969 | -36.7 C (-34.1 F) |
| 1970 | -30.6 C (-23.1 F) |
| 1971 | -26.7 C (-16.1 F) |
| 1972 | -34.4 C (-29.9 F) |
| 1973 | -32.2 C (-26.0 F) |
| 1974 | -28.3 C (-18.9 F) |
| 1975 | -32.2 C (-26.0 F) |
| 1976 | -21.1 C (-6.0 F) |
| 1977 | -28.9 C (-20.0 F) |
| 1978 | -37.2 C (-35.0 F) |
| 1979 | -36.7 C (-34.1 F) |
| 1980 | -28.9 C (-20.0 F) |
| 1981 | -26.7 C (-16.1 F) |
| 1982 | -34.4 C (-29.9 F) |
| 1983 | -34.4 C (-29.9 F) |
| 1984 | -31.7 C (-25.1 F) |
| 1985 | -32.2 C (-26.0 F) |
| 1986 | -25.0 C (-13.0 F) |
| 1987 | -22.2 C (-8.0 F) |
| 1988 | -30.0 C (-22.0 F) |
| 1989 | -31.1 C (-24.0 F) |
| 1990 | -34.4 C (-29.9 F) |
| 1991 | -30.6 C (-23.1 F) |
| 1992 | -23.3 C (-9.9 F) |
| 1993 | -32.8 C (-27.0 F) |
| 1994 | -28.3 C (-18.9 F) |
| 1995 | -22.2 C (-8.0 F) |
| 1996 | -36.1 C (-33.0 F) |
| 1997 | -28.9 C (-20.0 F) |
| 1998 | -31.7 C (-25.1 F) |
| 1999 | -14.4 C (6.1 F) |
| 2000 | -25.6 C (-14.1 F) |
| 2001 | -21.1 C (-6.0 F) |
| 2002 | -20.0 C (-4.0 F) |
| 2003 | -18.9 C (-2.0 F) |
| 2004 | -36.1 C (-33.0 F) |
| 2005 | -34.4 C (-29.9 F) |
| 2006 | -25.6 C (-14.1 F) |
| 2007 | -21.7 C (-7.1 F) |
| 2008 | -29.4 C (-20.9 F) |
| 2009 | -25.6 C (-14.1 F) |
| 2010 | -22.8 C (-9.0 F) |
| 2011 | -31.1 C (-24.0 F) |
| 2012 | -18.9 C (-2.0 F) |
| 2013 | -13.9 C (7.0 F) |
| 2014 | -31.1 C (-24.0 F) |
| 2015 | -19.4 C (-2.9 F) |
| 2016 | -27.2 C (-17.0 F) |
| 2017 | -30.0 C (-22.0 F) |
| 2018 | -27.8 C (-18.0 F) |
| 2019 | -30.6 C (-23.1 F) |
| 2020 | -19.4 C (-2.9 F) |
| 2021 | -30.0 C (-22.0 F) |
| 2022 | -35.0 C (-31.0 F) |
| 2023 | -22.8 C (-9.0 F) |
| 2024 | -36.1 C (-33.0 F) |
| 2025 | -25.6 C (-14.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1960 | 13.2 mm (0.5 in) |
| 1961 | 18.3 mm (0.7 in) |
| 1962 | 11.4 mm (0.4 in) |
| 1963 | 28.4 mm (1.1 in) |
| 1964 | 29.5 mm (1.2 in) |
| 1965 | 22.9 mm (0.9 in) |
| 1966 | 37.3 mm (1.5 in) |
| 1967 | 13.5 mm (0.5 in) |
| 1968 | 28.7 mm (1.1 in) |
| 1969 | 26.7 mm (1.1 in) |
| 1970 | 19.1 mm (0.8 in) |
| 1971 | 21.8 mm (0.9 in) |
| 1972 | 19.3 mm (0.8 in) |
| 1973 | 20.1 mm (0.8 in) |
| 1974 | 24.6 mm (1.0 in) |
| 1975 | 20.1 mm (0.8 in) |
| 1976 | 23.9 mm (0.9 in) |
| 1977 | 19.3 mm (0.8 in) |
| 1978 | 14.0 mm (0.6 in) |
| 1979 | 16.8 mm (0.7 in) |
| 1980 | 22.9 mm (0.9 in) |
| 1981 | 35.8 mm (1.4 in) |
| 1982 | 23.1 mm (0.9 in) |
| 1983 | 20.3 mm (0.8 in) |
| 1984 | 25.4 mm (1.0 in) |
| 1985 | 43.2 mm (1.7 in) |
| 1986 | 29.7 mm (1.2 in) |
| 1987 | 33.3 mm (1.3 in) |
| 1988 | 15.2 mm (0.6 in) |
| 1989 | 29.2 mm (1.1 in) |
| 1990 | 31.0 mm (1.2 in) |
| 1991 | 19.3 mm (0.8 in) |
| 1992 | 30.5 mm (1.2 in) |
| 1993 | 37.6 mm (1.5 in) |
| 1994 | 16.3 mm (0.6 in) |
| 1995 | 31.8 mm (1.3 in) |
| 1996 | 23.6 mm (0.9 in) |
| 1997 | 14.0 mm (0.6 in) |
| 1998 | 34.5 mm (1.4 in) |
| 1999 | 27.7 mm (1.1 in) |
| 2000 | 11.2 mm (0.4 in) |
| 2001 | 36.6 mm (1.4 in) |
| 2002 | 38.1 mm (1.5 in) |
| 2003 | 24.4 mm (1.0 in) |
| 2004 | 26.7 mm (1.1 in) |
| 2005 | 33.8 mm (1.3 in) |
| 2006 | 26.2 mm (1.0 in) |
| 2007 | 23.1 mm (0.9 in) |
| 2008 | 23.4 mm (0.9 in) |
| 2009 | 25.1 mm (1.0 in) |
| 2010 | 23.6 mm (0.9 in) |
| 2011 | 40.6 mm (1.6 in) |
| 2012 | 36.8 mm (1.4 in) |
| 2013 | 43.4 mm (1.7 in) |
| 2014 | 14.7 mm (0.6 in) |
| 2015 | 36.6 mm (1.4 in) |
| 2016 | 25.1 mm (1.0 in) |
| 2017 | 22.1 mm (0.9 in) |
| 2018 | 25.7 mm (1.0 in) |
| 2019 | 47.8 mm (1.9 in) |
| 2020 | 33.0 mm (1.3 in) |
| 2021 | 40.4 mm (1.6 in) |
| 2022 | 23.9 mm (0.9 in) |
| 2023 | 45.5 mm (1.8 in) |
| 2024 | 13.0 mm (0.5 in) |
| 2025 | 25.4 mm (1.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1960 | 19.6 mm (0.8 in) |
| 1961 | 35.2 mm (1.4 in) |
| 1962 | 15.7 mm (0.6 in) |
| 1963 | 34.0 mm (1.3 in) |
| 1964 | 60.5 mm (2.4 in) |
| 1965 | 39.7 mm (1.6 in) |
| 1966 | 65.1 mm (2.6 in) |
| 1967 | 15.9 mm (0.6 in) |
| 1968 | 49.8 mm (2.0 in) |
| 1969 | 73.2 mm (2.9 in) |
| 1970 | 25.2 mm (1.0 in) |
| 1971 | 25.3 mm (1.0 in) |
| 1972 | 31.0 mm (1.2 in) |
| 1973 | 28.6 mm (1.1 in) |
| 1974 | 42.9 mm (1.7 in) |
| 1975 | 37.9 mm (1.5 in) |
| 1976 | 36.9 mm (1.5 in) |
| 1977 | 24.3 mm (1.0 in) |
| 1978 | 31.9 mm (1.3 in) |
| 1979 | 22.4 mm (0.9 in) |
| 1980 | 45.2 mm (1.8 in) |
| 1981 | 56.9 mm (2.2 in) |
| 1982 | 40.2 mm (1.6 in) |
| 1983 | 37.6 mm (1.5 in) |
| 1984 | 34.8 mm (1.4 in) |
| 1985 | 52.1 mm (2.1 in) |
| 1986 | 50.3 mm (2.0 in) |
| 1987 | 49.5 mm (1.9 in) |
| 1988 | 35.1 mm (1.4 in) |
| 1989 | 50.1 mm (2.0 in) |
| 1990 | 45.0 mm (1.8 in) |
| 1991 | 22.8 mm (0.9 in) |
| 1992 | 41.4 mm (1.6 in) |
| 1993 | 82.4 mm (3.2 in) |
| 1994 | 23.7 mm (0.9 in) |
| 1995 | 69.9 mm (2.8 in) |
| 1996 | 45.7 mm (1.8 in) |
| 1997 | 34.3 mm (1.4 in) |
| 1998 | 83.7 mm (3.3 in) |
| 1999 | 32.8 mm (1.3 in) |
| 2000 | 20.6 mm (0.8 in) |
| 2001 | 47.0 mm (1.9 in) |
| 2002 | 68.8 mm (2.7 in) |
| 2003 | 24.4 mm (1.0 in) |
| 2004 | 51.1 mm (2.0 in) |
| 2005 | 59.3 mm (2.3 in) |
| 2006 | 72.5 mm (2.9 in) |
| 2007 | 23.8 mm (0.9 in) |
| 2008 | 26.4 mm (1.0 in) |
| 2009 | 30.5 mm (1.2 in) |
| 2010 | 48.2 mm (1.9 in) |
| 2011 | 43.6 mm (1.7 in) |
| 2012 | 59.0 mm (2.3 in) |
| 2013 | 51.3 mm (2.0 in) |
| 2014 | 28.6 mm (1.1 in) |
| 2015 | 43.9 mm (1.7 in) |
| 2016 | 58.4 mm (2.3 in) |
| 2017 | 65.9 mm (2.6 in) |
| 2018 | 34.7 mm (1.4 in) |
| 2019 | 57.0 mm (2.2 in) |
| 2020 | 35.8 mm (1.4 in) |
| 2021 | 64.2 mm (2.5 in) |
| 2022 | 48.5 mm (1.9 in) |
| 2023 | 45.5 mm (1.8 in) |
| 2024 | 28.2 mm (1.1 in) |
| 2025 | 38.6 mm (1.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1960 | 47 days |
| 1961 | 38 days |
| 1962 | 25 days |
| 1963 | 25 days |
| 1964 | 15 days |
| 1965 | 22 days |
| 1966 | 27 days |
| 1967 | 35 days |
| 1968 | 31 days |
| 1969 | 67 days |
| 1970 | 37 days |
| 1971 | 43 days |
| 1972 | 28 days |
| 1973 | 70 days |
| 1974 | 32 days |
| 1975 | 25 days |
| 1976 | 39 days |
| 1977 | 30 days |
| 1978 | 37 days |
| 1979 | 63 days |
| 1980 | 24 days |
| 1981 | 22 days |
| 1982 | 24 days |
| 1983 | 16 days |
| 1984 | 35 days |
| 1985 | 33 days |
| 1986 | 26 days |
| 1987 | 32 days |
| 1988 | 27 days |
| 1989 | 19 days |
| 1990 | 30 days |
| 1991 | 34 days |
| 1992 | 24 days |
| 1993 | 20 days |
| 1994 | 32 days |
| 1995 | 17 days |
| 1996 | 30 days |
| 1997 | 25 days |
| 1998 | 36 days |
| 1999 | 39 days |
| 2000 | 36 days |
| 2001 | 37 days |
| 2002 | 27 days |
| 2003 | 43 days |
| 2004 | 36 days |
| 2005 | 34 days |
| 2006 | 24 days |
| 2007 | 44 days |
| 2008 | 45 days |
| 2009 | 28 days |
| 2010 | 56 days |
| 2011 | 35 days |
| 2012 | 26 days |
| 2013 | 37 days |
| 2014 | 21 days |
| 2015 | 31 days |
| 2016 | 19 days |
| 2017 | 82 days |
| 2018 | 54 days |
| 2019 | 18 days |
| 2020 | 44 days |
| 2021 | 41 days |
| 2022 | 43 days |
| 2023 | 36 days |
| 2024 | 26 days |
| 2025 | 30 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 Eureka Rs falls on 21 May and the median first autumn frost on 17 September, which leaves a median of 122 days between them.
In 1992 to 2024 the median growing season was 133 days. That is 17 days more than in 1961 to 1991.
Fitted over all years, the growing season changes by +7.2 days per decade at this station.
| Measure | Median, all years | Earliest period (1961 to 1991) | Recent period (1992 to 2024) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 21 May | 23 May | 13 May | 10 days earlier | -3.8 days per decade |
| First autumn frost | 17 September | 13 September | 21 September | 8 days later | +3.3 days per decade |
| Growing days | 122 days | 116 days | 133 days | 17 days more | +7.2 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
62 years, 1961 to 2024A day with at least 25.7 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 50.0 mm (2.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 25.7 mm (1.0 in) | |
| 5 years | 33.6 mm (1.3 in) | |
| 10 years | 38.3 mm (1.5 in) | |
| 25 years | 43.4 mm (1.7 in) | |
| 50 years | 46.9 mm (1.8 in) | |
| 100 years | 50.0 mm (2.0 in) | Longer than the 62 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, 62 years of values from 1961 to 2024.
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: 47.8 mm (1.9 in) in 2019; 45.5 mm (1.8 in) in 2023; 43.2 mm (1.7 in) in 1985.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Eureka Rs, at 1991. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1991 ran 0.4 C (0.7 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1991 | +0.4 | +0.7 | likely | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
2008 to 2024 against 1961 to 1990Over 2008 to 2024, Eureka Rs had a mean temperature of 8.6 C (47.5 F) and 349.8 mm (13.8 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Tensleep 4NE (United States, 796 km away), Fairfield (United States, 989 km away) and Malta 4 ESE (United States, 747 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Tensleep 4NE | United States | 796 km (495 mi) | 8.6 C (47.5 F) | 327.8 mm (12.9 in) | 0.70 |
| Fairfield | United States | 989 km (615 mi) | 8.2 C (46.8 F) | 315.8 mm (12.4 in) | 0.72 |
| Malta 4 ESE | United States | 747 km (464 mi) | 8.4 C (47.2 F) | 276.0 mm (10.9 in) | 0.74 |
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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).