Altenbern Weather Records (USC00050214)
Record envelope, standing records and threshold days for Altenbern (USC00050214), Colorado, United States, with 80 years of record.
Key Facts for Altenbern
- Altenbern (USC00050214) is a weather station in Colorado, United States at 39.50 latitude and -108.38 longitude, 1,718 m (5,637 ft) above sea level.
- The station reports from 1947 to 2026, 80 years of record.
- 1,464 records set at Altenbern still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Altenbern set a daily record high minimum temperature of 18.3 C (64.9 F) on 29 July 2026.
About the Station
- Location: Colorado, United States, 39.50 latitude, -108.38 longitude.
- Elevation: 1,718 m (5,637 ft).
- Period of record: 1947 to 2026, 80 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
18 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 14.4 C (57.9 F) | -35.6 C (-32.1 F) | 13.3 C (55.9 F) | -17.2 C (1.0 F) |
| Feb | 19.4 C (66.9 F) | -28.9 C (-20.0 F) | 16.7 C (62.1 F) | -18.3 C (-0.9 F) |
| Mar | 29.4 C (84.9 F) | -23.9 C (-11.0 F) | 29.4 C (84.9 F) | -6.7 C (19.9 F) |
| Apr | 28.9 C (84.0 F) | -17.2 C (1.0 F) | 25.6 C (78.1 F) | -5.6 C (21.9 F) |
| May | 36.1 C (97.0 F) | -7.2 C (19.0 F) | 31.7 C (89.1 F) | -3.3 C (26.1 F) |
| Jun | 38.9 C (102.0 F) | -5.6 C (21.9 F) | 35.0 C (95.0 F) | 3.3 C (37.9 F) |
| Jul | 40.0 C (104.0 F) | -1.1 C (30.0 F) | 38.3 C (100.9 F) | 5.6 C (42.1 F) |
| Aug | 37.2 C (99.0 F) | -3.3 C (26.1 F) | n/a | n/a |
| Sep | 36.1 C (97.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Oct | 30.6 C (87.1 F) | -18.9 C (-2.0 F) | n/a | n/a |
| Nov | 22.2 C (72.0 F) | -23.9 C (-11.0 F) | n/a | n/a |
| Dec | 17.8 C (64.0 F) | -30.6 C (-23.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1958 | 12 |
| 1959 | 21 |
| 1960 | 35 |
| 1961 | 18 |
| 1962 | 49 |
| 1963 | 31 |
| 1964 | 31 |
| 1965 | 37 |
| 1966 | 24 |
| 1967 | 20 |
| 1968 | 19 |
| 1969 | 25 |
| 1970 | 23 |
| 1971 | 31 |
| 1972 | 31 |
| 1973 | 18 |
| 1974 | 17 |
| 1975 | 32 |
| 1976 | 10 |
| 1977 | 19 |
| 1978 | 16 |
| 1979 | 28 |
| 1980 | 13 |
| 1981 | 16 |
| 1982 | 20 |
| 1983 | 12 |
| 1984 | 22 |
| 1985 | 23 |
| 1986 | 28 |
| 1987 | 25 |
| 1988 | 19 |
| 1989 | 41 |
| 1990 | 61 |
| 1991 | 17 |
| 1992 | 24 |
| 1993 | 11 |
| 1994 | 8 |
| 1995 | 22 |
| 1996 | 25 |
| 1997 | 13 |
| 1998 | 18 |
| 1999 | 19 |
| 2000 | 28 |
| 2001 | 17 |
| 2002 | 22 |
| 2003 | 30 |
| 2004 | 13 |
| 2005 | 14 |
| 2006 | 16 |
| 2007 | 13 |
| 2008 | 13 |
| 2009 | 24 |
| 2010 | 15 |
| 2011 | 18 |
| 2012 | 16 |
| 2013 | 20 |
| 2014 | 8 |
| 2015 | 20 |
| 2016 | 16 |
| 2017 | 13 |
| 2018 | 6 |
| 2019 | 23 |
| 2020 | 16 |
| 2021 | 24 |
| 2022 | 9 |
| 2023 | 13 |
| 2024 | 15 |
| 2025 | 35 |
| 2026 | 23 |
All-Time Record Progression
7 new records| Date | Kind | Detail |
|---|---|---|
| 1980-01-28 | Record daily snowfall | Record daily snowfall 40.6 cm (16.0 in) |
| 1984-06-07 | Record daily precipitation | Record daily precipitation 46.2 mm (1.8 in) |
| 1989-02-04 | Record daily snowfall | Record daily snowfall 51.8 cm (20.4 in) |
| 1989-07-05 | Record high maximum temperature | Record high maximum temperature 38.9 C (102.0 F) |
| 1989-07-06 | Record high maximum temperature | Record high maximum temperature 40.0 C (104.0 F) |
| 1990-07-02 | Record high minimum temperature | Record high minimum temperature 26.1 C (79.0 F) |
| 2006-10-06 | Record daily precipitation | Record daily precipitation 47.5 mm (1.9 in) |
Wettest Day of Each Month
Oct: 47.5 mm (1.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 36.8 mm (1.4 in) | 25 January 1954 |
| Feb | 37.3 mm (1.5 in) | 21 February 1996 |
| Mar | 44.2 mm (1.7 in) | 28 March 1993 |
| Apr | 28.2 mm (1.1 in) | 1 April 2026 |
| May | 39.6 mm (1.6 in) | 15 May 2010 |
| Jun | 46.2 mm (1.8 in) | 7 June 1984 |
| Jul | 33.5 mm (1.3 in) | 26 July 1976 |
| Aug | 43.2 mm (1.7 in) | 8 August 1986 |
| Sep | 44.2 mm (1.7 in) | 9 September 2014 |
| Oct | 47.5 mm (1.9 in) | 6 October 2006 |
| Nov | 32.0 mm (1.3 in) | 9 November 1985 |
| Dec | 45.2 mm (1.8 in) | 20 December 2010 |
Period of Record Coverage
1958 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1958 | 113 | 31% | No |
| 1959 | 361 | 99% | Yes |
| 1960 | 365 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 364 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 364 | 100% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 363 | 99% | Yes |
| 1968 | 364 | 99% | Yes |
| 1969 | 363 | 99% | Yes |
| 1970 | 363 | 99% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 363 | 99% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 364 | 100% | Yes |
| 1976 | 365 | 100% | Yes |
| 1977 | 363 | 99% | Yes |
| 1978 | 364 | 100% | Yes |
| 1979 | 363 | 99% | Yes |
| 1980 | 363 | 99% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 357 | 98% | Yes |
| 1983 | 362 | 99% | Yes |
| 1984 | 361 | 99% | Yes |
| 1985 | 363 | 99% | Yes |
| 1986 | 360 | 99% | Yes |
| 1987 | 359 | 98% | Yes |
| 1988 | 361 | 99% | Yes |
| 1989 | 359 | 98% | Yes |
| 1990 | 361 | 99% | Yes |
| 1991 | 360 | 99% | Yes |
| 1992 | 362 | 99% | Yes |
| 1993 | 364 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 365 | 100% | Yes |
| 1997 | 364 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 335 | 92% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 355 | 97% | Yes |
| 2004 | 357 | 98% | Yes |
| 2005 | 333 | 91% | Yes |
| 2006 | 334 | 92% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 364 | 99% | Yes |
| 2009 | 362 | 99% | Yes |
| 2010 | 364 | 100% | Yes |
| 2011 | 365 | 100% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 364 | 100% | Yes |
| 2016 | 365 | 100% | Yes |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 364 | 100% | Yes |
| 2020 | 358 | 98% | Yes |
| 2021 | 365 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 318 | 87% | No |
| 2026 | 212 | 58% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 29 July 2026 | Altenbern, US | daily high min | 18.3 C (64.9 F) | 2.7 C (4.9 F) | 65 years | 33 of 100 (Routine) |
| 28 July 2026 | Altenbern, US | daily high min | 17.2 C (63.0 F) | 0.5 C (0.9 F) | 12 years | 10 of 100 (Routine) |
| 25 July 2026 | Altenbern, US | daily high max (Tie) | 36.7 C (98.1 F) | tie | 65 years | 6 of 100 (Routine) |
| 21 July 2026 | Altenbern, US | daily high min | 18.3 C (64.9 F) | 1.6 C (2.9 F) | 8 years | 13 of 100 (Routine) |
| 21 July 2026 | Altenbern, US | daily high max (Tie) | 37.8 C (100.0 F) | tie | 23 years | 3 of 100 (Routine) |
| 20 July 2026 | Altenbern, US | daily high max (Tie) | 37.8 C (100.0 F) | tie | 63 years | 6 of 100 (Routine) |
| 19 July 2026 | Altenbern, US | daily high min | 16.7 C (62.1 F) | 0.6 C (1.1 F) | 23 years | 13 of 100 (Routine) |
| 25 June 2026 | Altenbern, US | daily high min (Tie) | 13.9 C (57.0 F) | tie | 13 years | 2 of 100 (Routine) |
| 18 May 2026 | Altenbern, US | daily rain | 25.4 mm (1.0 in) | 13.0 mm (0.5 in) | 15 years | 37 of 100 (Notable) |
| 14 May 2026 | Altenbern, US | daily high max | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 29 years | 16 of 100 (Routine) |
| 12 May 2026 | Altenbern, US | daily high max | 31.7 C (89.1 F) | 0.6 C (1.1 F) | 65 years | 26 of 100 (Routine) |
| 26 April 2026 | Altenbern, US | daily rain | 14.0 mm (0.6 in) | 0.3 mm (0.01 in) | 27 years | 16 of 100 (Routine) |
| 1 April 2026 | Altenbern, US | monthly rain | 28.2 mm (1.1 in) | 2.5 mm (0.10 in) | 16 years | 27 of 100 (Routine) |
| 30 March 2026 | Altenbern, US | daily high max | 24.4 C (75.9 F) | 1.6 C (2.9 F) | 60 years | 26 of 100 (Routine) |
| 29 March 2026 | Altenbern, US | daily high max | 25.0 C (77.0 F) | 1.1 C (2.0 F) | 40 years | 20 of 100 (Routine) |
| 28 March 2026 | Altenbern, US | daily high max (Tie) | 23.3 C (73.9 F) | tie | 40 years | 4 of 100 (Routine) |
| 27 March 2026 | Altenbern, US | daily high max (Tie) | 23.9 C (75.0 F) | tie | 4 years | 1 of 100 (Routine) |
| 26 March 2026 | Altenbern, US | daily high max | 27.2 C (81.0 F) | 3.9 C (7.0 F) | 0 years | 13 of 100 (Routine) |
| 25 March 2026 | Altenbern, US | monthly high max | 29.4 C (84.9 F) | 1.6 C (2.9 F) | 0 years | 18 of 100 (Routine) |
| 25 March 2026 | Altenbern, US | daily high min | 4.4 C (39.9 F) | 1.6 C (2.9 F) | 19 years | 14 of 100 (Routine) |
Climate Trend
63 complete years, 1959 to 2024| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1959 | 8.2 C | -0.14 C |
| 1960 | 8.0 C | -0.32 C |
| 1961 | 8.1 C | -0.31 C |
| 1962 | 8.2 C | -0.20 C |
| 1963 | 8.5 C | +0.16 C |
| 1964 | 6.9 C | -1.47 C |
| 1965 | 7.6 C | -0.81 C |
| 1966 | 8.1 C | -0.23 C |
| 1967 | 7.6 C | -0.79 C |
| 1968 | 7.3 C | -1.07 C |
| 1969 | 8.4 C | 0.00 C |
| 1970 | 8.1 C | -0.23 C |
| 1971 | 8.0 C | -0.40 C |
| 1972 | 8.7 C | +0.32 C |
| 1973 | 7.3 C | -1.02 C |
| 1974 | 7.5 C | -0.84 C |
| 1975 | 6.8 C | -1.57 C |
| 1976 | 7.7 C | -0.64 C |
| 1977 | 8.8 C | +0.48 C |
| 1978 | 8.3 C | -0.07 C |
| 1979 | 7.2 C | -1.17 C |
| 1980 | 8.9 C | +0.52 C |
| 1981 | 9.2 C | +0.82 C |
| 1982 | 7.3 C | -1.04 C |
| 1983 | 8.1 C | -0.25 C |
| 1984 | 7.1 C | -1.23 C |
| 1985 | 7.7 C | -0.67 C |
| 1986 | 9.0 C | +0.59 C |
| 1987 | 8.3 C | -0.05 C |
| 1988 | 8.1 C | -0.24 C |
| 1989 | 8.5 C | +0.10 C |
| 1990 | 8.0 C | -0.36 C |
| 1991 | 7.5 C | -0.88 C |
| 1992 | 7.7 C | -0.64 C |
| 1993 | 7.5 C | -0.83 C |
| 1994 | 8.7 C | +0.33 C |
| 1995 | 8.7 C | +0.31 C |
| 1996 | 8.5 C | +0.10 C |
| 1997 | 8.2 C | -0.14 C |
| 1998 | 8.7 C | +0.37 C |
| 1999 | 8.7 C | +0.37 C |
| 2000 | 9.4 C | +0.99 C |
| 2002 | 8.8 C | +0.46 C |
| 2003 | 9.8 C | +1.46 C |
| 2004 | 8.7 C | +0.29 C |
| 2007 | 9.2 C | +0.87 C |
| 2008 | 7.9 C | -0.45 C |
| 2009 | 8.2 C | -0.20 C |
| 2010 | 8.4 C | +0.07 C |
| 2011 | 8.1 C | -0.23 C |
| 2012 | 9.8 C | +1.43 C |
| 2013 | 7.9 C | -0.46 C |
| 2014 | 8.9 C | +0.54 C |
| 2015 | 9.4 C | +0.99 C |
| 2016 | 8.9 C | +0.53 C |
| 2017 | 9.8 C | +1.42 C |
| 2018 | 9.5 C | +1.09 C |
| 2019 | 8.3 C | -0.11 C |
| 2020 | 9.1 C | +0.70 C |
| 2021 | 9.9 C | +1.56 C |
| 2022 | 8.8 C | +0.39 C |
| 2023 | 8.8 C | +0.41 C |
| 2024 | 10.1 C | +1.70 C |
The annual mean temperature here has risen by 0.2 C (0.2 to 0.3) per decade over 1959 to 2024. In Fahrenheit: 0.4 F (0.3 to 0.6) per decade. The slope is a straight line fitted to 63 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.2 C (0.2 to 0.3) per decade | 0.4 F (0.3 to 0.6) per decade | 1959 to 2024 | 63 | Rise |
| Mean daily maximum | 0.2 C (0.1 to 0.3) per decade | 0.3 F (0.1 to 0.5) per decade | 1959 to 2024 | 63 | Rise |
| Mean daily minimum | 0.3 C (0.2 to 0.4) per decade | 0.5 F (0.4 to 0.7) per decade | 1959 to 2024 | 63 | 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
1947 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.0 C (104.0 F) | 1989 | 36.1 C (97.0 F) | 69 |
| Coldest night (TNn) | -35.6 C (-32.1 F) | 1963 | -23.9 C (-11.0 F) | 69 |
| Wettest day (Rx1day) | 47.5 mm (1.9 in) | 2006 | 25.8 mm (1.0 in) | 80 |
| Wettest five days (Rx5day) | 116.1 mm (4.6 in) | 2010 | 44.1 mm (1.7 in) | 80 |
| Longest dry spell (CDD) | 82 days | 1972 | 28 days | 80 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1947 | n/a |
| 1948 | n/a |
| 1949 | n/a |
| 1950 | n/a |
| 1951 | n/a |
| 1952 | n/a |
| 1953 | n/a |
| 1954 | n/a |
| 1955 | n/a |
| 1956 | n/a |
| 1957 | n/a |
| 1958 | 31.7 C (89.1 F) |
| 1959 | 37.2 C (99.0 F) |
| 1960 | 38.3 C (100.9 F) |
| 1961 | 37.2 C (99.0 F) |
| 1962 | 36.1 C (97.0 F) |
| 1963 | 37.8 C (100.0 F) |
| 1964 | 37.2 C (99.0 F) |
| 1965 | 35.6 C (96.1 F) |
| 1966 | 35.0 C (95.0 F) |
| 1967 | 33.3 C (91.9 F) |
| 1968 | 35.0 C (95.0 F) |
| 1969 | 36.1 C (97.0 F) |
| 1970 | 36.7 C (98.1 F) |
| 1971 | 37.8 C (100.0 F) |
| 1972 | 36.1 C (97.0 F) |
| 1973 | 36.7 C (98.1 F) |
| 1974 | 36.1 C (97.0 F) |
| 1975 | 35.0 C (95.0 F) |
| 1976 | 35.6 C (96.1 F) |
| 1977 | 34.4 C (93.9 F) |
| 1978 | 36.7 C (98.1 F) |
| 1979 | 36.1 C (97.0 F) |
| 1980 | 35.0 C (95.0 F) |
| 1981 | 36.7 C (98.1 F) |
| 1982 | 35.0 C (95.0 F) |
| 1983 | 35.0 C (95.0 F) |
| 1984 | 35.0 C (95.0 F) |
| 1985 | 37.2 C (99.0 F) |
| 1986 | 35.0 C (95.0 F) |
| 1987 | 37.2 C (99.0 F) |
| 1988 | 35.0 C (95.0 F) |
| 1989 | 40.0 C (104.0 F) |
| 1990 | 38.9 C (102.0 F) |
| 1991 | 36.7 C (98.1 F) |
| 1992 | 34.4 C (93.9 F) |
| 1993 | 34.4 C (93.9 F) |
| 1994 | 36.1 C (97.0 F) |
| 1995 | 36.1 C (97.0 F) |
| 1996 | 36.1 C (97.0 F) |
| 1997 | 35.6 C (96.1 F) |
| 1998 | 37.2 C (99.0 F) |
| 1999 | 35.6 C (96.1 F) |
| 2000 | 37.2 C (99.0 F) |
| 2001 | 36.7 C (98.1 F) |
| 2002 | 39.4 C (102.9 F) |
| 2003 | 38.3 C (100.9 F) |
| 2004 | 37.2 C (99.0 F) |
| 2005 | 37.8 C (100.0 F) |
| 2006 | 35.0 C (95.0 F) |
| 2007 | 36.7 C (98.1 F) |
| 2008 | 35.6 C (96.1 F) |
| 2009 | 35.0 C (95.0 F) |
| 2010 | 36.7 C (98.1 F) |
| 2011 | 35.6 C (96.1 F) |
| 2012 | 36.1 C (97.0 F) |
| 2013 | 38.3 C (100.9 F) |
| 2014 | 37.2 C (99.0 F) |
| 2015 | 35.0 C (95.0 F) |
| 2016 | 36.1 C (97.0 F) |
| 2017 | 35.6 C (96.1 F) |
| 2018 | 37.2 C (99.0 F) |
| 2019 | 35.6 C (96.1 F) |
| 2020 | 36.1 C (97.0 F) |
| 2021 | 38.9 C (102.0 F) |
| 2022 | 36.1 C (97.0 F) |
| 2023 | 37.8 C (100.0 F) |
| 2024 | 37.2 C (99.0 F) |
| 2025 | 37.2 C (99.0 F) |
| 2026 | 38.3 C (100.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1947 | n/a |
| 1948 | n/a |
| 1949 | n/a |
| 1950 | n/a |
| 1951 | n/a |
| 1952 | n/a |
| 1953 | n/a |
| 1954 | n/a |
| 1955 | n/a |
| 1956 | n/a |
| 1957 | n/a |
| 1958 | -15.6 C (3.9 F) |
| 1959 | -25.6 C (-14.1 F) |
| 1960 | -25.0 C (-13.0 F) |
| 1961 | -23.9 C (-11.0 F) |
| 1962 | -30.6 C (-23.1 F) |
| 1963 | -35.6 C (-32.1 F) |
| 1964 | -27.2 C (-17.0 F) |
| 1965 | -21.1 C (-6.0 F) |
| 1966 | -23.9 C (-11.0 F) |
| 1967 | -25.6 C (-14.1 F) |
| 1968 | -26.7 C (-16.1 F) |
| 1969 | -21.1 C (-6.0 F) |
| 1970 | -22.2 C (-8.0 F) |
| 1971 | -31.7 C (-25.1 F) |
| 1972 | -25.0 C (-13.0 F) |
| 1973 | -26.1 C (-15.0 F) |
| 1974 | -26.7 C (-16.1 F) |
| 1975 | -27.2 C (-17.0 F) |
| 1976 | -27.2 C (-17.0 F) |
| 1977 | -23.9 C (-11.0 F) |
| 1978 | -26.1 C (-15.0 F) |
| 1979 | -28.9 C (-20.0 F) |
| 1980 | -19.4 C (-2.9 F) |
| 1981 | -22.2 C (-8.0 F) |
| 1982 | -28.3 C (-18.9 F) |
| 1983 | -22.8 C (-9.0 F) |
| 1984 | -27.8 C (-18.0 F) |
| 1985 | -28.9 C (-20.0 F) |
| 1986 | -17.2 C (1.0 F) |
| 1987 | -20.6 C (-5.1 F) |
| 1988 | -26.7 C (-16.1 F) |
| 1989 | -26.1 C (-15.0 F) |
| 1990 | -30.0 C (-22.0 F) |
| 1991 | -23.9 C (-11.0 F) |
| 1992 | -26.7 C (-16.1 F) |
| 1993 | -23.9 C (-11.0 F) |
| 1994 | -20.6 C (-5.1 F) |
| 1995 | -18.9 C (-2.0 F) |
| 1996 | -23.9 C (-11.0 F) |
| 1997 | -18.9 C (-2.0 F) |
| 1998 | -30.6 C (-23.1 F) |
| 1999 | -19.4 C (-2.9 F) |
| 2000 | -20.6 C (-5.1 F) |
| 2001 | -19.4 C (-2.9 F) |
| 2002 | -22.2 C (-8.0 F) |
| 2003 | -20.6 C (-5.1 F) |
| 2004 | -24.4 C (-11.9 F) |
| 2005 | -22.2 C (-8.0 F) |
| 2006 | -23.3 C (-9.9 F) |
| 2007 | -25.0 C (-13.0 F) |
| 2008 | -24.4 C (-11.9 F) |
| 2009 | -27.2 C (-17.0 F) |
| 2010 | -23.9 C (-11.0 F) |
| 2011 | -27.8 C (-18.0 F) |
| 2012 | -25.0 C (-13.0 F) |
| 2013 | -28.9 C (-20.0 F) |
| 2014 | -21.1 C (-6.0 F) |
| 2015 | -23.3 C (-9.9 F) |
| 2016 | -22.2 C (-8.0 F) |
| 2017 | -21.1 C (-6.0 F) |
| 2018 | -18.9 C (-2.0 F) |
| 2019 | -21.7 C (-7.1 F) |
| 2020 | -24.4 C (-11.9 F) |
| 2021 | -18.3 C (-0.9 F) |
| 2022 | -24.4 C (-11.9 F) |
| 2023 | -22.2 C (-8.0 F) |
| 2024 | -21.7 C (-7.1 F) |
| 2025 | -21.7 C (-7.1 F) |
| 2026 | -18.3 C (-0.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1947 | 24.9 mm (1.0 in) |
| 1948 | 21.8 mm (0.9 in) |
| 1949 | 21.1 mm (0.8 in) |
| 1950 | 20.8 mm (0.8 in) |
| 1951 | 39.4 mm (1.6 in) |
| 1952 | 18.0 mm (0.7 in) |
| 1953 | 23.1 mm (0.9 in) |
| 1954 | 36.8 mm (1.4 in) |
| 1955 | 24.4 mm (1.0 in) |
| 1956 | 19.6 mm (0.8 in) |
| 1957 | 34.3 mm (1.4 in) |
| 1958 | 21.3 mm (0.8 in) |
| 1959 | 23.4 mm (0.9 in) |
| 1960 | 15.5 mm (0.6 in) |
| 1961 | 37.1 mm (1.5 in) |
| 1962 | 33.3 mm (1.3 in) |
| 1963 | 21.8 mm (0.9 in) |
| 1964 | 18.5 mm (0.7 in) |
| 1965 | 33.0 mm (1.3 in) |
| 1966 | 42.2 mm (1.7 in) |
| 1967 | 38.1 mm (1.5 in) |
| 1968 | 22.1 mm (0.9 in) |
| 1969 | 33.5 mm (1.3 in) |
| 1970 | 22.4 mm (0.9 in) |
| 1971 | 33.0 mm (1.3 in) |
| 1972 | 29.2 mm (1.1 in) |
| 1973 | 13.7 mm (0.5 in) |
| 1974 | 15.2 mm (0.6 in) |
| 1975 | 19.8 mm (0.8 in) |
| 1976 | 33.5 mm (1.3 in) |
| 1977 | 20.3 mm (0.8 in) |
| 1978 | 27.2 mm (1.1 in) |
| 1979 | 19.6 mm (0.8 in) |
| 1980 | 26.2 mm (1.0 in) |
| 1981 | 28.2 mm (1.1 in) |
| 1982 | 24.9 mm (1.0 in) |
| 1983 | 26.4 mm (1.0 in) |
| 1984 | 46.2 mm (1.8 in) |
| 1985 | 33.5 mm (1.3 in) |
| 1986 | 43.2 mm (1.7 in) |
| 1987 | 15.7 mm (0.6 in) |
| 1988 | 18.3 mm (0.7 in) |
| 1989 | 22.1 mm (0.9 in) |
| 1990 | 22.1 mm (0.9 in) |
| 1991 | 21.1 mm (0.8 in) |
| 1992 | 37.6 mm (1.5 in) |
| 1993 | 44.2 mm (1.7 in) |
| 1994 | 23.1 mm (0.9 in) |
| 1995 | 38.6 mm (1.5 in) |
| 1996 | 37.3 mm (1.5 in) |
| 1997 | 31.5 mm (1.2 in) |
| 1998 | 25.7 mm (1.0 in) |
| 1999 | 28.7 mm (1.1 in) |
| 2000 | 20.3 mm (0.8 in) |
| 2001 | 33.5 mm (1.3 in) |
| 2002 | 18.8 mm (0.7 in) |
| 2003 | 18.5 mm (0.7 in) |
| 2004 | 27.4 mm (1.1 in) |
| 2005 | 23.1 mm (0.9 in) |
| 2006 | 47.5 mm (1.9 in) |
| 2007 | 41.7 mm (1.6 in) |
| 2008 | 25.9 mm (1.0 in) |
| 2009 | 21.3 mm (0.8 in) |
| 2010 | 45.2 mm (1.8 in) |
| 2011 | 24.4 mm (1.0 in) |
| 2012 | 15.5 mm (0.6 in) |
| 2013 | 28.4 mm (1.1 in) |
| 2014 | 44.2 mm (1.7 in) |
| 2015 | 26.4 mm (1.0 in) |
| 2016 | 36.3 mm (1.4 in) |
| 2017 | 22.4 mm (0.9 in) |
| 2018 | 36.8 mm (1.4 in) |
| 2019 | 24.9 mm (1.0 in) |
| 2020 | 24.1 mm (0.9 in) |
| 2021 | 32.5 mm (1.3 in) |
| 2022 | 22.6 mm (0.9 in) |
| 2023 | 30.2 mm (1.2 in) |
| 2024 | 32.0 mm (1.3 in) |
| 2025 | 18.5 mm (0.7 in) |
| 2026 | 28.2 mm (1.1 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1947 | 42.9 mm (1.7 in) |
| 1948 | 51.2 mm (2.0 in) |
| 1949 | 40.9 mm (1.6 in) |
| 1950 | 26.9 mm (1.1 in) |
| 1951 | 69.2 mm (2.7 in) |
| 1952 | 69.2 mm (2.7 in) |
| 1953 | 38.4 mm (1.5 in) |
| 1954 | 43.0 mm (1.7 in) |
| 1955 | 43.4 mm (1.7 in) |
| 1956 | 35.1 mm (1.4 in) |
| 1957 | 47.3 mm (1.9 in) |
| 1958 | 30.0 mm (1.2 in) |
| 1959 | 34.8 mm (1.4 in) |
| 1960 | 26.2 mm (1.0 in) |
| 1961 | 64.1 mm (2.5 in) |
| 1962 | 46.8 mm (1.8 in) |
| 1963 | 46.5 mm (1.8 in) |
| 1964 | 35.3 mm (1.4 in) |
| 1965 | 56.4 mm (2.2 in) |
| 1966 | 87.7 mm (3.5 in) |
| 1967 | 43.5 mm (1.7 in) |
| 1968 | 46.6 mm (1.8 in) |
| 1969 | 58.2 mm (2.3 in) |
| 1970 | 36.2 mm (1.4 in) |
| 1971 | 40.4 mm (1.6 in) |
| 1972 | 36.1 mm (1.4 in) |
| 1973 | 31.3 mm (1.2 in) |
| 1974 | 34.5 mm (1.4 in) |
| 1975 | 39.4 mm (1.6 in) |
| 1976 | 53.4 mm (2.1 in) |
| 1977 | 37.3 mm (1.5 in) |
| 1978 | 56.9 mm (2.2 in) |
| 1979 | 52.1 mm (2.1 in) |
| 1980 | 51.8 mm (2.0 in) |
| 1981 | 41.7 mm (1.6 in) |
| 1982 | 51.9 mm (2.0 in) |
| 1983 | 53.9 mm (2.1 in) |
| 1984 | 79.9 mm (3.1 in) |
| 1985 | 52.9 mm (2.1 in) |
| 1986 | 50.4 mm (2.0 in) |
| 1987 | 36.1 mm (1.4 in) |
| 1988 | 33.2 mm (1.3 in) |
| 1989 | 25.1 mm (1.0 in) |
| 1990 | 28.7 mm (1.1 in) |
| 1991 | 43.5 mm (1.7 in) |
| 1992 | 69.7 mm (2.7 in) |
| 1993 | 59.5 mm (2.3 in) |
| 1994 | 34.6 mm (1.4 in) |
| 1995 | 49.1 mm (1.9 in) |
| 1996 | 81.2 mm (3.2 in) |
| 1997 | 86.7 mm (3.4 in) |
| 1998 | 35.8 mm (1.4 in) |
| 1999 | 51.1 mm (2.0 in) |
| 2000 | 34.4 mm (1.4 in) |
| 2001 | 39.4 mm (1.6 in) |
| 2002 | 34.8 mm (1.4 in) |
| 2003 | 34.8 mm (1.4 in) |
| 2004 | 46.6 mm (1.8 in) |
| 2005 | 62.7 mm (2.5 in) |
| 2006 | 82.6 mm (3.3 in) |
| 2007 | 47.8 mm (1.9 in) |
| 2008 | 39.2 mm (1.5 in) |
| 2009 | 44.7 mm (1.8 in) |
| 2010 | 116.1 mm (4.6 in) |
| 2011 | 31.5 mm (1.2 in) |
| 2012 | 24.4 mm (1.0 in) |
| 2013 | 61.0 mm (2.4 in) |
| 2014 | 52.1 mm (2.1 in) |
| 2015 | 37.3 mm (1.5 in) |
| 2016 | 39.3 mm (1.5 in) |
| 2017 | 44.2 mm (1.7 in) |
| 2018 | 74.9 mm (2.9 in) |
| 2019 | 47.2 mm (1.9 in) |
| 2020 | 35.4 mm (1.4 in) |
| 2021 | 46.5 mm (1.8 in) |
| 2022 | 43.9 mm (1.7 in) |
| 2023 | 42.7 mm (1.7 in) |
| 2024 | 68.5 mm (2.7 in) |
| 2025 | 52.6 mm (2.1 in) |
| 2026 | 30.0 mm (1.2 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1947 | 18 days |
| 1948 | 23 days |
| 1949 | 27 days |
| 1950 | 62 days |
| 1951 | 28 days |
| 1952 | 42 days |
| 1953 | 35 days |
| 1954 | 25 days |
| 1955 | 26 days |
| 1956 | 42 days |
| 1957 | 21 days |
| 1958 | 56 days |
| 1959 | 27 days |
| 1960 | 29 days |
| 1961 | 47 days |
| 1962 | 35 days |
| 1963 | 29 days |
| 1964 | 45 days |
| 1965 | 27 days |
| 1966 | 34 days |
| 1967 | 25 days |
| 1968 | 16 days |
| 1969 | 22 days |
| 1970 | 25 days |
| 1971 | 36 days |
| 1972 | 82 days |
| 1973 | 27 days |
| 1974 | 37 days |
| 1975 | 23 days |
| 1976 | 57 days |
| 1977 | 24 days |
| 1978 | 41 days |
| 1979 | 37 days |
| 1980 | 38 days |
| 1981 | 28 days |
| 1982 | 18 days |
| 1983 | 16 days |
| 1984 | 30 days |
| 1985 | 20 days |
| 1986 | 24 days |
| 1987 | 28 days |
| 1988 | 27 days |
| 1989 | 29 days |
| 1990 | 29 days |
| 1991 | 31 days |
| 1992 | 34 days |
| 1993 | 24 days |
| 1994 | 38 days |
| 1995 | 21 days |
| 1996 | 26 days |
| 1997 | 26 days |
| 1998 | 18 days |
| 1999 | 22 days |
| 2000 | 23 days |
| 2001 | 52 days |
| 2002 | 44 days |
| 2003 | 30 days |
| 2004 | 31 days |
| 2005 | 23 days |
| 2006 | 25 days |
| 2007 | 39 days |
| 2008 | 37 days |
| 2009 | 22 days |
| 2010 | 23 days |
| 2011 | 23 days |
| 2012 | 42 days |
| 2013 | 36 days |
| 2014 | 26 days |
| 2015 | 28 days |
| 2016 | 16 days |
| 2017 | 39 days |
| 2018 | 44 days |
| 2019 | 32 days |
| 2020 | 43 days |
| 2021 | 27 days |
| 2022 | 31 days |
| 2023 | 17 days |
| 2024 | 27 days |
| 2025 | 39 days |
| 2026 | 39 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
63 years with a frostAcross 63 years with a frost, the median last spring frost at Altenbern falls on 24 May and the median first autumn frost on 24 September, which leaves a median of 123 days between them.
In 1992 to 2024 the median growing season was 130 days. That is 16 days more than in 1959 to 1988.
Fitted over all years, the growing season changes by +5.3 days per decade at this station.
| Measure | Median, all years | Earliest period (1959 to 1988) | Recent period (1992 to 2024) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 24 May | 27 May | 22 May | 5 days earlier | -1.9 days per decade |
| First autumn frost | 24 September | 20 September | 29 September | 9 days later | +3.4 days per decade |
| Growing days | 123 days | 114 days | 130 days | 16 days more | +5.3 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
78 years, 1948 to 2025A day with at least 26.5 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 54.7 mm (2.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 26.5 mm (1.0 in) | |
| 5 years | 34.5 mm (1.4 in) | |
| 10 years | 39.6 mm (1.6 in) | |
| 25 years | 45.8 mm (1.8 in) | |
| 50 years | 50.3 mm (2.0 in) | |
| 100 years | 54.7 mm (2.2 in) | Longer than the 78 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, 78 years of values from 1948 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: 47.5 mm (1.9 in) in 2006; 46.2 mm (1.8 in) in 1984; 45.2 mm (1.8 in) in 2010.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2010 to 2024 against 1961 to 1990Over 2010 to 2024, Altenbern had a mean temperature of 9.0 C (48.3 F) and 426.6 mm (16.8 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Scipio (United States, 321 km away), Corinne (United States, 389 km away) and Byers 5 ENE (United States, 365 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Scipio | United States | 321 km (199 mi) | 8.9 C (48.0 F) | 360.3 mm (14.2 in) | 0.59 |
| Corinne | United States | 389 km (242 mi) | 9.2 C (48.6 F) | 446.1 mm (17.6 in) | 0.61 |
| Byers 5 ENE | United States | 365 km (227 mi) | 9.3 C (48.8 F) | 389.5 mm (15.3 in) | 0.64 |
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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).