Slettnes Fyr Weather Records (NOE00109777)
Record envelope, standing records and threshold days for Slettnes Fyr (NOE00109777), Norway, with 71 years of record.
Key Facts for Slettnes Fyr
- Slettnes Fyr (NOE00109777) is a weather station in Norway at 71.08 latitude and 28.22 longitude, 8 m (26 ft) above sea level.
- The station reports from 1956 to 2026, 71 years of record.
- 1,464 records set at Slettnes Fyr still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Slettnes Fyr set a daily record high minimum temperature of 13.0 C (55.4 F) on 30 August 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: Norway, 71.08 latitude, 28.22 longitude.
- Elevation: 8 m (26 ft).
- Period of record: 1956 to 2026, 71 years.
- Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
6 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 7.3 C (45.1 F) | -20.9 C (-5.6 F) | 4.5 C (40.1 F) | -14.5 C (5.9 F) |
| Feb | 7.8 C (46.0 F) | -23.1 C (-9.6 F) | 3.6 C (38.5 F) | -15.6 C (3.9 F) |
| Mar | 7.9 C (46.2 F) | -18.2 C (-0.8 F) | 4.7 C (40.5 F) | -7.6 C (18.3 F) |
| Apr | 13.6 C (56.5 F) | -12.8 C (9.0 F) | 10.1 C (50.2 F) | -3.7 C (25.3 F) |
| May | 23.4 C (74.1 F) | -10.8 C (12.6 F) | 15.4 C (59.7 F) | -1.8 C (28.8 F) |
| Jun | 27.6 C (81.7 F) | -2.8 C (27.0 F) | 19.5 C (67.1 F) | 3.3 C (37.9 F) |
| Jul | 32.2 C (90.0 F) | 2.0 C (35.6 F) | 21.9 C (71.4 F) | 5.6 C (42.1 F) |
| Aug | 30.3 C (86.5 F) | 1.4 C (34.5 F) | 20.2 C (68.4 F) | 2.6 C (36.7 F) |
| Sep | 22.8 C (73.0 F) | -4.3 C (24.3 F) | n/a | n/a |
| Oct | 16.0 C (60.8 F) | -10.5 C (13.1 F) | n/a | n/a |
| Nov | 10.4 C (50.7 F) | -13.7 C (7.3 F) | n/a | n/a |
| Dec | 7.7 C (45.9 F) | -17.5 C (0.5 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1956 | 17 |
| 1957 | 8 |
| 1958 | 18 |
| 1959 | 19 |
| 1960 | 42 |
| 1961 | 10 |
| 1962 | 23 |
| 1963 | 37 |
| 1964 | 16 |
| 1965 | 40 |
| 1966 | 66 |
| 1967 | 16 |
| 1968 | 66 |
| 1969 | 14 |
| 1970 | 23 |
| 1971 | 16 |
| 1972 | 34 |
| 1973 | 30 |
| 1974 | 26 |
| 1975 | 16 |
| 1976 | 21 |
| 1977 | 34 |
| 1978 | 25 |
| 1979 | 24 |
| 1980 | 24 |
| 1981 | 19 |
| 1982 | 21 |
| 1983 | 8 |
| 1984 | 28 |
| 1985 | 21 |
| 1986 | 22 |
| 1987 | 35 |
| 1988 | 15 |
| 1989 | 26 |
| 1990 | 13 |
| 1991 | 21 |
| 1992 | 23 |
| 1993 | 10 |
| 1994 | 5 |
| 1995 | 14 |
| 1996 | 16 |
| 1997 | 13 |
| 1998 | 19 |
| 1999 | 15 |
| 2000 | 18 |
| 2001 | 13 |
| 2002 | 14 |
| 2003 | 24 |
| 2004 | 14 |
| 2005 | 16 |
| 2006 | 31 |
| 2007 | 25 |
| 2008 | 13 |
| 2009 | 13 |
| 2010 | 19 |
| 2011 | 22 |
| 2012 | 3 |
| 2013 | 23 |
| 2014 | 8 |
| 2015 | 9 |
| 2016 | 22 |
| 2017 | 10 |
| 2018 | 25 |
| 2019 | 7 |
| 2020 | 8 |
| 2021 | 17 |
| 2022 | 10 |
| 2023 | 15 |
| 2024 | 38 |
| 2025 | 27 |
| 2026 | 11 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1991-06-26 | Record daily precipitation | Record daily precipitation 35.2 mm (1.4 in) |
| 1999-01-26 | Record low maximum temperature | Record low maximum temperature -18.8 C (-1.8 F) |
| 2000-07-15 | Record high minimum temperature | Record high minimum temperature 16.8 C (62.2 F) |
| 2016-07-03 | Record high minimum temperature | Record high minimum temperature 17.6 C (63.7 F) |
Wettest Day of Each Month
Jun: 35.2 mm (1.4 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 17.5 mm (0.7 in) | 19 January 1971 |
| Feb | 25.7 mm (1.0 in) | 21 February 2004 |
| Mar | 17.0 mm (0.7 in) | 13 March 2003 |
| Apr | 23.1 mm (0.9 in) | 7 April 1974 |
| May | 22.5 mm (0.9 in) | 9 May 1982 |
| Jun | 35.2 mm (1.4 in) | 26 June 1991 |
| Jul | 28.0 mm (1.1 in) | 13 July 1969 |
| Aug | 27.7 mm (1.1 in) | 24 August 2004 |
| Sep | 23.2 mm (0.9 in) | 3 September 1992 |
| Oct | 22.7 mm (0.9 in) | 3 October 1987 |
| Nov | 24.6 mm (1.0 in) | 7 November 1980 |
| Dec | 24.6 mm (1.0 in) | 2 December 1990 |
Period of Record Coverage
1956 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1956 | 128 | 35% | No |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 364 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 357 | 98% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 365 | 100% | 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 | 366 | 100% | Yes |
| 2021 | 364 | 100% | Yes |
| 2022 | 365 | 100% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 366 | 100% | Yes |
| 2025 | 365 | 100% | Yes |
| 2026 | 243 | 67% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 30 August 2026 | Slettnes Fyr, NO | daily high min (Provisional) | 13.0 C (55.4 F) | 0.2 C (0.4 F) | 1 year | 7 of 100 (Routine) |
| 27 July 2026 | Slettnes Fyr, NO | daily high min | 13.1 C (55.6 F) | 0.3 C (0.5 F) | 1 year | 8 of 100 (Routine) |
| 12 June 2026 | Slettnes Fyr, NO | daily high min | 10.2 C (50.4 F) | 1.5 C (2.7 F) | 4 years | 14 of 100 (Routine) |
| 11 June 2026 | Slettnes Fyr, NO | daily high max | 19.5 C (67.1 F) | 1.0 C (1.8 F) | 60 years | 27 of 100 (Routine) |
| 4 June 2026 | Slettnes Fyr, NO | daily high max | 18.3 C (64.9 F) | 0.3 C (0.5 F) | 40 years | 19 of 100 (Routine) |
| 4 June 2026 | Slettnes Fyr, NO | daily high min | 10.2 C (50.4 F) | 0.2 C (0.4 F) | 40 years | 19 of 100 (Routine) |
| 16 May 2026 | Slettnes Fyr, NO | daily high max | 15.4 C (59.7 F) | 1.9 C (3.4 F) | 3 years | 12 of 100 (Routine) |
| 21 April 2026 | Slettnes Fyr, NO | daily high min | 5.0 C (41.0 F) | 0.3 C (0.5 F) | 7 years | 9 of 100 (Routine) |
| 14 April 2026 | Slettnes Fyr, NO | daily high max (Tie) | 8.8 C (47.8 F) | tie | 36 years | 4 of 100 (Routine) |
| 11 April 2026 | Slettnes Fyr, NO | daily high max | 9.4 C (48.9 F) | 1.4 C (2.5 F) | 65 years | 30 of 100 (Routine) |
| 10 April 2026 | Slettnes Fyr, NO | daily high max | 7.9 C (46.2 F) | 1.1 C (2.0 F) | 65 years | 29 of 100 (Routine) |
| 19 March 2026 | Slettnes Fyr, NO | daily high min | 1.7 C (35.1 F) | 0.4 C (0.7 F) | 33 years | 18 of 100 (Routine) |
| 2 January 2026 | Slettnes Fyr, NO | daily low max | -7.5 C (18.5 F) | 1.0 C (1.8 F) | 16 years | 13 of 100 (Routine) |
| 27 December 2025 | Slettnes Fyr, NO | daily high max | 5.3 C (41.5 F) | 0.3 C (0.5 F) | 52 years | 22 of 100 (Routine) |
| 25 December 2025 | Slettnes Fyr, NO | daily high max | 5.2 C (41.4 F) | 0.3 C (0.5 F) | 38 years | 18 of 100 (Routine) |
| 24 December 2025 | Slettnes Fyr, NO | daily high min | 2.9 C (37.2 F) | 0.1 C (0.2 F) | 28 years | 15 of 100 (Routine) |
| 23 December 2025 | Slettnes Fyr, NO | daily high max | 6.3 C (43.3 F) | 1.2 C (2.2 F) | 63 years | 28 of 100 (Routine) |
| 28 October 2025 | Slettnes Fyr, NO | daily high min | 4.4 C (39.9 F) | 0.8 C (1.4 F) | 27 years | 17 of 100 (Routine) |
| 3 October 2025 | Slettnes Fyr, NO | daily high max | 12.2 C (54.0 F) | 0.3 C (0.5 F) | 4 years | 8 of 100 (Routine) |
| 29 September 2025 | Slettnes Fyr, NO | daily high max | 15.8 C (60.4 F) | 1.3 C (2.3 F) | 4 years | 11 of 100 (Routine) |
Climate Trend
69 complete years, 1957 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1957 | 2.3 C | +0.14 C |
| 1958 | 1.1 C | -1.09 C |
| 1959 | 2.7 C | +0.53 C |
| 1960 | 2.5 C | +0.35 C |
| 1961 | 2.5 C | +0.32 C |
| 1962 | 1.0 C | -1.15 C |
| 1963 | 1.4 C | -0.71 C |
| 1964 | 2.3 C | +0.14 C |
| 1965 | 0.6 C | -1.50 C |
| 1966 | 0.1 C | -2.07 C |
| 1967 | 2.3 C | +0.11 C |
| 1968 | 0.2 C | -1.96 C |
| 1969 | 1.1 C | -1.06 C |
| 1970 | 1.8 C | -0.30 C |
| 1971 | 0.4 C | -1.75 C |
| 1972 | 3.1 C | +1.00 C |
| 1973 | 1.6 C | -0.53 C |
| 1974 | 2.7 C | +0.57 C |
| 1975 | 1.8 C | -0.34 C |
| 1976 | 1.4 C | -0.78 C |
| 1977 | 1.2 C | -0.99 C |
| 1978 | 0.4 C | -1.73 C |
| 1979 | 1.3 C | -0.86 C |
| 1980 | 1.4 C | -0.75 C |
| 1981 | 0.9 C | -1.26 C |
| 1982 | 1.7 C | -0.44 C |
| 1983 | 2.2 C | +0.08 C |
| 1984 | 2.4 C | +0.28 C |
| 1985 | 1.1 C | -1.00 C |
| 1986 | 1.7 C | -0.45 C |
| 1987 | 0.9 C | -1.21 C |
| 1988 | 1.2 C | -0.91 C |
| 1989 | 3.2 C | +1.05 C |
| 1990 | 3.0 C | +0.88 C |
| 1991 | 2.6 C | +0.50 C |
| 1992 | 2.7 C | +0.52 C |
| 1993 | 1.8 C | -0.33 C |
| 1994 | 2.2 C | +0.09 C |
| 1995 | 1.9 C | -0.26 C |
| 1996 | 2.1 C | +0.00 C |
| 1997 | 2.0 C | -0.13 C |
| 1998 | 0.8 C | -1.37 C |
| 1999 | 2.1 C | -0.06 C |
| 2000 | 2.7 C | +0.54 C |
| 2001 | 2.1 C | +0.00 C |
| 2002 | 2.2 C | +0.02 C |
| 2003 | 2.4 C | +0.30 C |
| 2004 | 3.1 C | +0.98 C |
| 2005 | 2.9 C | +0.77 C |
| 2006 | 3.0 C | +0.87 C |
| 2007 | 3.0 C | +0.81 C |
| 2008 | 2.1 C | -0.02 C |
| 2009 | 2.1 C | -0.03 C |
| 2010 | 2.2 C | +0.02 C |
| 2011 | 3.3 C | +1.16 C |
| 2012 | 2.4 C | +0.22 C |
| 2013 | 3.4 C | +1.23 C |
| 2014 | 2.7 C | +0.54 C |
| 2015 | 3.1 C | +0.96 C |
| 2016 | 3.8 C | +1.61 C |
| 2017 | 2.8 C | +0.63 C |
| 2018 | 3.1 C | +0.99 C |
| 2019 | 2.0 C | -0.13 C |
| 2020 | 3.2 C | +1.07 C |
| 2021 | 2.4 C | +0.28 C |
| 2022 | 3.3 C | +1.19 C |
| 2023 | 3.0 C | +0.83 C |
| 2024 | 3.8 C | +1.62 C |
| 2025 | 3.8 C | +1.64 C |
The annual mean temperature here has risen by 0.3 C (0.2 to 0.4) per decade over 1957 to 2025. In Fahrenheit: 0.5 F (0.3 to 0.6) per decade. The slope is a straight line fitted to 69 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 | 0.5 F (0.3 to 0.6) per decade | 1957 to 2025 | 69 | Rise |
| Mean daily maximum | 0.3 C (0.2 to 0.4) per decade | 0.5 F (0.3 to 0.6) per decade | 1957 to 2025 | 69 | Rise |
| Mean daily minimum | 0.3 C (0.2 to 0.4) per decade | 0.5 F (0.4 to 0.7) per decade | 1957 to 2025 | 69 | 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
1956 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 32.2 C (90.0 F) | 1972 | 23.5 C (74.3 F) | 71 |
| Coldest night (TNn) | -23.1 C (-9.6 F) | 1985 | -15.2 C (4.6 F) | 71 |
| Wettest day (Rx1day) | 35.2 mm (1.4 in) | 1991 | 18.5 mm (0.7 in) | 51 |
| Wettest five days (Rx5day) | 63.5 mm (2.5 in) | 2004 | 36.2 mm (1.4 in) | 51 |
| Longest dry spell (CDD) | 100 days | 2014 | 18 days | 51 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1956 | 14.4 C (57.9 F) |
| 1957 | 27.0 C (80.6 F) |
| 1958 | 26.5 C (79.7 F) |
| 1959 | 23.8 C (74.8 F) |
| 1960 | 30.4 C (86.7 F) |
| 1961 | 21.1 C (70.0 F) |
| 1962 | 18.7 C (65.7 F) |
| 1963 | 23.4 C (74.1 F) |
| 1964 | 27.6 C (81.7 F) |
| 1965 | 19.6 C (67.3 F) |
| 1966 | 25.4 C (77.7 F) |
| 1967 | 27.5 C (81.5 F) |
| 1968 | 19.0 C (66.2 F) |
| 1969 | 21.5 C (70.7 F) |
| 1970 | 26.2 C (79.2 F) |
| 1971 | 22.0 C (71.6 F) |
| 1972 | 32.2 C (90.0 F) |
| 1973 | 25.0 C (77.0 F) |
| 1974 | 23.5 C (74.3 F) |
| 1975 | 22.4 C (72.3 F) |
| 1976 | 24.0 C (75.2 F) |
| 1977 | 21.8 C (71.2 F) |
| 1978 | 21.0 C (69.8 F) |
| 1979 | 24.2 C (75.6 F) |
| 1980 | 24.6 C (76.3 F) |
| 1981 | 24.8 C (76.6 F) |
| 1982 | 24.6 C (76.3 F) |
| 1983 | 23.2 C (73.8 F) |
| 1984 | 24.5 C (76.1 F) |
| 1985 | 23.0 C (73.4 F) |
| 1986 | 26.9 C (80.4 F) |
| 1987 | 22.0 C (71.6 F) |
| 1988 | 22.2 C (72.0 F) |
| 1989 | 26.4 C (79.5 F) |
| 1990 | 22.6 C (72.7 F) |
| 1991 | 24.0 C (75.2 F) |
| 1992 | 24.0 C (75.2 F) |
| 1993 | 19.5 C (67.1 F) |
| 1994 | 26.0 C (78.8 F) |
| 1995 | 19.5 C (67.1 F) |
| 1996 | 22.8 C (73.0 F) |
| 1997 | 24.1 C (75.4 F) |
| 1998 | 18.1 C (64.6 F) |
| 1999 | 23.1 C (73.6 F) |
| 2000 | 28.0 C (82.4 F) |
| 2001 | 22.2 C (72.0 F) |
| 2002 | 21.8 C (71.2 F) |
| 2003 | 21.9 C (71.4 F) |
| 2004 | 25.4 C (77.7 F) |
| 2005 | 22.1 C (71.8 F) |
| 2006 | 21.9 C (71.4 F) |
| 2007 | 19.5 C (67.1 F) |
| 2008 | 20.2 C (68.4 F) |
| 2009 | 22.8 C (73.0 F) |
| 2010 | 24.6 C (76.3 F) |
| 2011 | 23.1 C (73.6 F) |
| 2012 | 20.6 C (69.1 F) |
| 2013 | 24.7 C (76.5 F) |
| 2014 | 26.4 C (79.5 F) |
| 2015 | 19.8 C (67.6 F) |
| 2016 | 27.9 C (82.2 F) |
| 2017 | 23.1 C (73.6 F) |
| 2018 | 31.4 C (88.5 F) |
| 2019 | 25.8 C (78.4 F) |
| 2020 | 22.7 C (72.9 F) |
| 2021 | 24.6 C (76.3 F) |
| 2022 | 28.9 C (84.0 F) |
| 2023 | 28.8 C (83.8 F) |
| 2024 | 28.9 C (84.0 F) |
| 2025 | 30.3 C (86.5 F) |
| 2026 | 21.9 C (71.4 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1956 | -13.5 C (7.7 F) |
| 1957 | -16.8 C (1.8 F) |
| 1958 | -19.3 C (-2.7 F) |
| 1959 | -12.4 C (9.7 F) |
| 1960 | -14.2 C (6.4 F) |
| 1961 | -16.0 C (3.2 F) |
| 1962 | -16.9 C (1.6 F) |
| 1963 | -16.9 C (1.6 F) |
| 1964 | -19.5 C (-3.1 F) |
| 1965 | -14.2 C (6.4 F) |
| 1966 | -21.4 C (-6.5 F) |
| 1967 | -14.7 C (5.5 F) |
| 1968 | -16.0 C (3.2 F) |
| 1969 | -18.3 C (-0.9 F) |
| 1970 | -22.4 C (-8.3 F) |
| 1971 | -15.0 C (5.0 F) |
| 1972 | -13.8 C (7.2 F) |
| 1973 | -15.5 C (4.1 F) |
| 1974 | -15.0 C (5.0 F) |
| 1975 | -12.5 C (9.5 F) |
| 1976 | -17.5 C (0.5 F) |
| 1977 | -15.4 C (4.3 F) |
| 1978 | -18.2 C (-0.8 F) |
| 1979 | -18.0 C (-0.4 F) |
| 1980 | -21.0 C (-5.8 F) |
| 1981 | -18.2 C (-0.8 F) |
| 1982 | -14.0 C (6.8 F) |
| 1983 | -15.2 C (4.6 F) |
| 1984 | -14.0 C (6.8 F) |
| 1985 | -23.1 C (-9.6 F) |
| 1986 | -20.0 C (-4.0 F) |
| 1987 | -17.4 C (0.7 F) |
| 1988 | -15.5 C (4.1 F) |
| 1989 | -13.5 C (7.7 F) |
| 1990 | -15.0 C (5.0 F) |
| 1991 | -12.8 C (9.0 F) |
| 1992 | -12.6 C (9.3 F) |
| 1993 | -12.2 C (10.0 F) |
| 1994 | -13.6 C (7.5 F) |
| 1995 | -16.8 C (1.8 F) |
| 1996 | -13.5 C (7.7 F) |
| 1997 | -14.0 C (6.8 F) |
| 1998 | -16.8 C (1.8 F) |
| 1999 | -20.9 C (-5.6 F) |
| 2000 | -12.9 C (8.8 F) |
| 2001 | -16.6 C (2.1 F) |
| 2002 | -15.1 C (4.8 F) |
| 2003 | -15.1 C (4.8 F) |
| 2004 | -11.8 C (10.8 F) |
| 2005 | -12.9 C (8.8 F) |
| 2006 | -17.5 C (0.5 F) |
| 2007 | -13.1 C (8.4 F) |
| 2008 | -13.5 C (7.7 F) |
| 2009 | -17.2 C (1.0 F) |
| 2010 | -16.4 C (2.5 F) |
| 2011 | -15.4 C (4.3 F) |
| 2012 | -19.8 C (-3.6 F) |
| 2013 | -16.7 C (1.9 F) |
| 2014 | -13.8 C (7.2 F) |
| 2015 | -14.5 C (5.9 F) |
| 2016 | -17.2 C (1.0 F) |
| 2017 | -12.7 C (9.1 F) |
| 2018 | -14.9 C (5.2 F) |
| 2019 | -16.4 C (2.5 F) |
| 2020 | -11.5 C (11.3 F) |
| 2021 | -14.4 C (6.1 F) |
| 2022 | -13.0 C (8.6 F) |
| 2023 | -12.6 C (9.3 F) |
| 2024 | -16.4 C (2.5 F) |
| 2025 | -12.7 C (9.1 F) |
| 2026 | -15.6 C (3.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1956 | 8.6 mm (0.34 in) |
| 1957 | 15.3 mm (0.6 in) |
| 1958 | 18.0 mm (0.7 in) |
| 1959 | 17.5 mm (0.7 in) |
| 1960 | 18.0 mm (0.7 in) |
| 1961 | 19.1 mm (0.8 in) |
| 1962 | 12.0 mm (0.5 in) |
| 1963 | 16.4 mm (0.6 in) |
| 1964 | 14.6 mm (0.6 in) |
| 1965 | 24.9 mm (1.0 in) |
| 1966 | 22.5 mm (0.9 in) |
| 1967 | 17.6 mm (0.7 in) |
| 1968 | 24.5 mm (1.0 in) |
| 1969 | 28.0 mm (1.1 in) |
| 1970 | 18.5 mm (0.7 in) |
| 1971 | 17.5 mm (0.7 in) |
| 1972 | 16.8 mm (0.7 in) |
| 1973 | 18.6 mm (0.7 in) |
| 1974 | 23.1 mm (0.9 in) |
| 1975 | 18.5 mm (0.7 in) |
| 1976 | 16.1 mm (0.6 in) |
| 1977 | 9.8 mm (0.39 in) |
| 1978 | 22.6 mm (0.9 in) |
| 1979 | 16.8 mm (0.7 in) |
| 1980 | 24.6 mm (1.0 in) |
| 1981 | 27.0 mm (1.1 in) |
| 1982 | 23.9 mm (0.9 in) |
| 1983 | 15.4 mm (0.6 in) |
| 1984 | 24.1 mm (0.9 in) |
| 1985 | 13.2 mm (0.5 in) |
| 1986 | 16.4 mm (0.6 in) |
| 1987 | 22.7 mm (0.9 in) |
| 1988 | 20.2 mm (0.8 in) |
| 1989 | 25.2 mm (1.0 in) |
| 1990 | 24.6 mm (1.0 in) |
| 1991 | 35.2 mm (1.4 in) |
| 1992 | 24.7 mm (1.0 in) |
| 1993 | 16.3 mm (0.6 in) |
| 1994 | 14.4 mm (0.6 in) |
| 1995 | 19.9 mm (0.8 in) |
| 1996 | 18.3 mm (0.7 in) |
| 1997 | 18.8 mm (0.7 in) |
| 1998 | 18.5 mm (0.7 in) |
| 1999 | 20.1 mm (0.8 in) |
| 2000 | 15.2 mm (0.6 in) |
| 2001 | 24.4 mm (1.0 in) |
| 2002 | 16.3 mm (0.6 in) |
| 2003 | 23.1 mm (0.9 in) |
| 2004 | 27.7 mm (1.1 in) |
| 2005 | 6.1 mm (0.24 in) |
| 2006 | n/a |
| 2007 | n/a |
| 2008 | n/a |
| 2009 | n/a |
| 2010 | n/a |
| 2011 | n/a |
| 2012 | n/a |
| 2013 | n/a |
| 2014 | 0.0 mm (0.00 in) |
| 2015 | n/a |
| 2016 | n/a |
| 2017 | n/a |
| 2018 | n/a |
| 2019 | n/a |
| 2020 | n/a |
| 2021 | n/a |
| 2022 | n/a |
| 2023 | n/a |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1956 | 17.9 mm (0.7 in) |
| 1957 | 26.5 mm (1.0 in) |
| 1958 | 32.0 mm (1.3 in) |
| 1959 | 38.6 mm (1.5 in) |
| 1960 | 34.2 mm (1.3 in) |
| 1961 | 60.5 mm (2.4 in) |
| 1962 | 19.7 mm (0.8 in) |
| 1963 | 43.2 mm (1.7 in) |
| 1964 | 35.1 mm (1.4 in) |
| 1965 | 36.8 mm (1.4 in) |
| 1966 | 36.8 mm (1.4 in) |
| 1967 | 33.6 mm (1.3 in) |
| 1968 | 46.6 mm (1.8 in) |
| 1969 | 43.1 mm (1.7 in) |
| 1970 | 36.2 mm (1.4 in) |
| 1971 | 35.4 mm (1.4 in) |
| 1972 | 27.5 mm (1.1 in) |
| 1973 | 36.8 mm (1.4 in) |
| 1974 | 33.0 mm (1.3 in) |
| 1975 | 33.2 mm (1.3 in) |
| 1976 | 28.2 mm (1.1 in) |
| 1977 | 22.4 mm (0.9 in) |
| 1978 | 26.6 mm (1.0 in) |
| 1979 | 35.0 mm (1.4 in) |
| 1980 | 37.0 mm (1.5 in) |
| 1981 | 48.0 mm (1.9 in) |
| 1982 | 42.5 mm (1.7 in) |
| 1983 | 34.7 mm (1.4 in) |
| 1984 | 44.4 mm (1.7 in) |
| 1985 | 37.3 mm (1.5 in) |
| 1986 | 47.8 mm (1.9 in) |
| 1987 | 43.0 mm (1.7 in) |
| 1988 | 28.4 mm (1.1 in) |
| 1989 | 40.9 mm (1.6 in) |
| 1990 | 35.0 mm (1.4 in) |
| 1991 | 48.3 mm (1.9 in) |
| 1992 | 48.1 mm (1.9 in) |
| 1993 | 34.4 mm (1.4 in) |
| 1994 | 24.9 mm (1.0 in) |
| 1995 | 39.6 mm (1.6 in) |
| 1996 | 28.5 mm (1.1 in) |
| 1997 | 50.3 mm (2.0 in) |
| 1998 | 41.4 mm (1.6 in) |
| 1999 | 47.4 mm (1.9 in) |
| 2000 | 31.5 mm (1.2 in) |
| 2001 | 38.8 mm (1.5 in) |
| 2002 | 27.5 mm (1.1 in) |
| 2003 | 43.7 mm (1.7 in) |
| 2004 | 63.5 mm (2.5 in) |
| 2005 | 15.2 mm (0.6 in) |
| 2006 | n/a |
| 2007 | n/a |
| 2008 | n/a |
| 2009 | n/a |
| 2010 | n/a |
| 2011 | n/a |
| 2012 | n/a |
| 2013 | n/a |
| 2014 | 0.0 mm (0.00 in) |
| 2015 | n/a |
| 2016 | n/a |
| 2017 | n/a |
| 2018 | n/a |
| 2019 | n/a |
| 2020 | n/a |
| 2021 | n/a |
| 2022 | n/a |
| 2023 | n/a |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1956 | 8 days |
| 1957 | 20 days |
| 1958 | 18 days |
| 1959 | 15 days |
| 1960 | 18 days |
| 1961 | 22 days |
| 1962 | 14 days |
| 1963 | 19 days |
| 1964 | 14 days |
| 1965 | 15 days |
| 1966 | 41 days |
| 1967 | 12 days |
| 1968 | 11 days |
| 1969 | 27 days |
| 1970 | 15 days |
| 1971 | 16 days |
| 1972 | 30 days |
| 1973 | 18 days |
| 1974 | 22 days |
| 1975 | 13 days |
| 1976 | 23 days |
| 1977 | 12 days |
| 1978 | 20 days |
| 1979 | 30 days |
| 1980 | 19 days |
| 1981 | 19 days |
| 1982 | 19 days |
| 1983 | 14 days |
| 1984 | 20 days |
| 1985 | 29 days |
| 1986 | 17 days |
| 1987 | 13 days |
| 1988 | 30 days |
| 1989 | 15 days |
| 1990 | 36 days |
| 1991 | 18 days |
| 1992 | 20 days |
| 1993 | 26 days |
| 1994 | 12 days |
| 1995 | 17 days |
| 1996 | 21 days |
| 1997 | 18 days |
| 1998 | 31 days |
| 1999 | 12 days |
| 2000 | 27 days |
| 2001 | 17 days |
| 2002 | 25 days |
| 2003 | 42 days |
| 2004 | 17 days |
| 2005 | 12 days |
| 2006 | n/a |
| 2007 | n/a |
| 2008 | n/a |
| 2009 | n/a |
| 2010 | n/a |
| 2011 | n/a |
| 2012 | n/a |
| 2013 | n/a |
| 2014 | 100 days |
| 2015 | n/a |
| 2016 | n/a |
| 2017 | n/a |
| 2018 | n/a |
| 2019 | n/a |
| 2020 | n/a |
| 2021 | n/a |
| 2022 | n/a |
| 2023 | n/a |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
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
69 years with a frostAcross 69 years with a frost, the median last spring frost at Slettnes Fyr falls on 24 May and the median first autumn frost on 9 October, which leaves a median of 140 days between them.
In 1996 to 2025 the median growing season was 151 days. That is 23 days more than in 1957 to 1986.
Fitted over all years, the growing season changes by +4.9 days per decade at this station.
| Measure | Median, all years | Earliest period (1957 to 1986) | Recent period (1996 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 24 May | 29 May | 17 May | 12 days earlier | -2.9 days per decade |
| First autumn frost | 9 October | 4 October | 14 October | 10 days later | +2.0 days per decade |
| Growing days | 140 days | 128 days | 151 days | 23 days more | +4.9 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
47 years, 1957 to 2003A day with at least 19.3 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 32.9 mm (1.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 19.3 mm (0.8 in) | |
| 5 years | 23.5 mm (0.9 in) | |
| 10 years | 26.1 mm (1.0 in) | |
| 25 years | 29.0 mm (1.1 in) | |
| 50 years | 31.0 mm (1.2 in) | Longer than the 47 years of record |
| 100 years | 32.9 mm (1.3 in) | Longer than the 47 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, 47 years of values from 1957 to 2003.
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: 35.2 mm (1.4 in) in 1991; 28.0 mm (1.1 in) in 1969; 27.0 mm (1.1 in) in 1981.
Station Changes
3 suspected3 changes were suspected in the annual mean temperature of Slettnes Fyr, at 1980, 2000 and 2009. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1980 ran 0.1 C (0.2 F) higher than in the years before (possible change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2000 ran 0.3 C (0.6 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 2009 ran 0.2 C (0.3 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1980 | +0.1 | +0.2 | possible | 5 |
| 2000 | -0.3 | -0.6 | likely | 5 |
| 2009 | +0.2 | +0.3 | 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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-17).