Leiter 9N Weather Records (USC00485506)
Record envelope, standing records and threshold days for Leiter 9N (USC00485506), Wyoming, United States, with 63 years of record.
Key Facts for Leiter 9N
- Leiter 9N (USC00485506) is a weather station in Wyoming, United States at 44.85 latitude and -106.29 longitude, 1,268 m (4,160 ft) above sea level.
- The station reports from 1964 to 2026, 63 years of record.
- 1,464 records set at Leiter 9N still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Leiter 9N set a daily record high maximum temperature of 40.0 C (104.0 F) on 8 August 2026.
About the Station
- Location: Wyoming, United States, 44.85 latitude, -106.29 longitude.
- Elevation: 1,268 m (4,160 ft).
- Period of record: 1964 to 2026, 63 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
26 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 18.3 C (64.9 F) | -36.7 C (-34.1 F) | 17.8 C (64.0 F) | -24.4 C (-11.9 F) |
| Feb | 21.7 C (71.1 F) | -37.2 C (-35.0 F) | 21.7 C (71.1 F) | -18.3 C (-0.9 F) |
| Mar | 28.9 C (84.0 F) | -28.3 C (-18.9 F) | 28.9 C (84.0 F) | -13.9 C (7.0 F) |
| Apr | 31.1 C (88.0 F) | -18.3 C (-0.9 F) | 26.7 C (80.1 F) | -5.6 C (21.9 F) |
| May | 35.0 C (95.0 F) | -9.4 C (15.1 F) | 35.0 C (95.0 F) | -7.8 C (18.0 F) |
| Jun | 41.1 C (106.0 F) | -0.6 C (30.9 F) | 38.3 C (100.9 F) | 5.6 C (42.1 F) |
| Jul | 43.9 C (111.0 F) | 3.3 C (37.9 F) | 40.6 C (105.1 F) | 17.8 C (64.0 F) |
| Aug | 40.6 C (105.1 F) | 1.1 C (34.0 F) | 40.0 C (104.0 F) | 4.4 C (39.9 F) |
| Sep | 40.0 C (104.0 F) | -11.1 C (12.0 F) | n/a | n/a |
| Oct | 33.3 C (91.9 F) | -25.0 C (-13.0 F) | n/a | n/a |
| Nov | 25.0 C (77.0 F) | -28.9 C (-20.0 F) | n/a | n/a |
| Dec | 22.8 C (73.0 F) | -37.8 C (-36.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1964 | 6 |
| 1965 | 41 |
| 1966 | 34 |
| 1967 | 21 |
| 1968 | 30 |
| 1969 | 32 |
| 1970 | 18 |
| 1971 | 18 |
| 1972 | 40 |
| 1973 | 18 |
| 1974 | 11 |
| 1975 | 20 |
| 1976 | 9 |
| 1977 | 12 |
| 1978 | 16 |
| 1979 | 8 |
| 1980 | 27 |
| 1981 | 25 |
| 1982 | 20 |
| 1983 | 28 |
| 1984 | 19 |
| 1985 | 50 |
| 1986 | 22 |
| 1987 | 24 |
| 1988 | 31 |
| 1989 | 35 |
| 1990 | 26 |
| 1991 | 24 |
| 1992 | 39 |
| 1993 | 24 |
| 1994 | 16 |
| 1995 | 26 |
| 1996 | 34 |
| 1997 | 28 |
| 1998 | 14 |
| 1999 | 24 |
| 2000 | 31 |
| 2001 | 11 |
| 2002 | 34 |
| 2003 | 35 |
| 2004 | 17 |
| 2005 | 29 |
| 2006 | 30 |
| 2007 | 9 |
| 2008 | 15 |
| 2009 | 21 |
| 2010 | 14 |
| 2011 | 10 |
| 2012 | 19 |
| 2013 | 15 |
| 2014 | 22 |
| 2015 | 27 |
| 2016 | 21 |
| 2017 | 14 |
| 2018 | 12 |
| 2019 | 16 |
| 2020 | 37 |
| 2021 | 34 |
| 2022 | 25 |
| 2023 | 16 |
| 2024 | 25 |
| 2025 | 25 |
| 2026 | 30 |
All-Time Record Progression
6 new records| Date | Kind | Detail |
|---|---|---|
| 1997-04-05 | Record daily snowfall | Record daily snowfall 35.6 cm (14.0 in) |
| 2001-06-29 | Record high minimum temperature | Record high minimum temperature 24.4 C (75.9 F) |
| 2006-07-15 | Record high maximum temperature | Record high maximum temperature 43.9 C (111.0 F) |
| 2007-03-29 | Record daily snowfall | Record daily snowfall 38.1 cm (15.0 in) |
| 2007-03-30 | Record snow depth | Record snow depth 55.9 cm (22.0 in) |
| 2020-06-13 | Record high minimum temperature | Record high minimum temperature 25.0 C (77.0 F) |
Wettest Day of Each Month
Jun: 59.7 mm (2.4 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 25.1 mm (1.0 in) | 29 January 1965 |
| Feb | 28.4 mm (1.1 in) | 22 February 2012 |
| Mar | 30.5 mm (1.2 in) | 29 March 2007 |
| Apr | 48.3 mm (1.9 in) | 20 April 1974 |
| May | 55.9 mm (2.2 in) | 18 May 1978 |
| Jun | 59.7 mm (2.4 in) | 7 June 1993 |
| Jul | 47.2 mm (1.9 in) | 21 July 2002 |
| Aug | 44.2 mm (1.7 in) | 20 August 1965 |
| Sep | 41.9 mm (1.6 in) | 1 September 1986 |
| Oct | 46.0 mm (1.8 in) | 26 October 1996 |
| Nov | 18.0 mm (0.7 in) | 9 November 1978 |
| Dec | 18.5 mm (0.7 in) | 14 December 2022 |
Period of Record Coverage
1964 to 2026| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1964 | 111 | 30% | No |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 336 | 92% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 365 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 364 | 100% | Yes |
| 1975 | 364 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 332 | 91% | Yes |
| 1979 | 303 | 83% | No |
| 1980 | 295 | 81% | No |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 364 | 99% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 363 | 99% | Yes |
| 1987 | 364 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 364 | 100% | Yes |
| 1991 | 363 | 99% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 362 | 99% | Yes |
| 1994 | 359 | 98% | Yes |
| 1995 | 364 | 100% | Yes |
| 1996 | 365 | 100% | Yes |
| 1997 | 331 | 91% | Yes |
| 1998 | 363 | 99% | Yes |
| 1999 | 363 | 99% | Yes |
| 2000 | 363 | 99% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 363 | 99% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 362 | 99% | Yes |
| 2006 | 361 | 99% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 365 | 100% | Yes |
| 2009 | 364 | 100% | Yes |
| 2010 | 361 | 99% | Yes |
| 2011 | 362 | 99% | Yes |
| 2012 | 332 | 91% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 353 | 97% | Yes |
| 2015 | 363 | 99% | Yes |
| 2016 | 366 | 100% | Yes |
| 2017 | 362 | 99% | Yes |
| 2018 | 362 | 99% | Yes |
| 2019 | 364 | 100% | Yes |
| 2020 | 363 | 99% | Yes |
| 2021 | 348 | 95% | Yes |
| 2022 | 362 | 99% | Yes |
| 2023 | 365 | 100% | Yes |
| 2024 | 363 | 99% | Yes |
| 2025 | 362 | 99% | Yes |
| 2026 | 164 | 45% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 8 August 2026 | Leiter 9N, US | daily high max | 40.0 C (104.0 F) | 1.1 C (2.0 F) | 56 years | 24 of 100 (Routine) |
| 3 August 2026 | Leiter 9N, US | daily low min | 4.4 C (39.9 F) | 2.8 C (5.0 F) | 48 years | 28 of 100 (Routine) |
| 1 August 2026 | Leiter 9N, US | daily high max | 40.0 C (104.0 F) | 1.7 C (3.1 F) | 17 years | 14 of 100 (Routine) |
| 27 July 2026 | Leiter 9N, US | daily high min (Tie) | 21.1 C (70.0 F) | tie | 39 years | 4 of 100 (Routine) |
| 26 July 2026 | Leiter 9N, US | daily high max | 40.6 C (105.1 F) | 1.2 C (2.2 F) | 37 years | 19 of 100 (Routine) |
| 25 July 2026 | Leiter 9N, US | daily high max (Tie) | 40.6 C (105.1 F) | tie | 1 year | 1 of 100 (Routine) |
| 22 June 2026 | Leiter 9N, US | daily rain | 16.0 mm (0.6 in) | 2.0 mm (0.08 in) | 12 years | 11 of 100 (Routine) |
| 6 June 2026 | Leiter 9N, US | daily high max | 38.3 C (100.9 F) | 0.5 C (0.9 F) | 37 years | 17 of 100 (Routine) |
| 3 June 2026 | Leiter 9N, US | daily high min | 15.6 C (60.1 F) | 0.6 C (1.1 F) | 20 years | 13 of 100 (Routine) |
| 20 May 2026 | Leiter 9N, US | daily low min | -4.4 C (24.1 F) | 0.5 C (0.9 F) | 23 years | 13 of 100 (Routine) |
| 18 May 2026 | Leiter 9N, US | daily low max | 6.1 C (43.0 F) | 1.7 C (3.1 F) | 55 years | 24 of 100 (Routine) |
| 11 May 2026 | Leiter 9N, US | monthly high max | 35.0 C (95.0 F) | 0.6 C (1.1 F) | 56 years | 33 of 100 (Routine) |
| 7 May 2026 | Leiter 9N, US | daily low min | -7.8 C (18.0 F) | 5.0 C (9.0 F) | 57 years | 35 of 100 (Notable) |
| 3 April 2026 | Leiter 9N, US | daily rain | 24.6 mm (1.0 in) | 18.2 mm (0.7 in) | 8 years | 20 of 100 (Routine) |
| 3 April 2026 | Leiter 9N, US | daily snowfall | 12.7 cm (5.0 in) | 2.5 cm (1.0 in) | 8 years | 12 of 100 (Routine) |
| 25 March 2026 | Leiter 9N, US | daily high min | 7.8 C (46.0 F) | 2.8 C (5.0 F) | 32 years | 20 of 100 (Routine) |
| 25 March 2026 | Leiter 9N, US | daily high max | 26.1 C (79.0 F) | 3.3 C (5.9 F) | 19 years | 15 of 100 (Routine) |
| 21 March 2026 | Leiter 9N, US | monthly high max | 28.9 C (84.0 F) | 1.7 C (3.1 F) | 21 years | 24 of 100 (Routine) |
| 21 March 2026 | Leiter 9N, US | daily high min | 6.7 C (44.1 F) | 1.1 C (2.0 F) | 19 years | 12 of 100 (Routine) |
| 20 March 2026 | Leiter 9N, US | monthly high max (Tie) | 27.2 C (81.0 F) | tie | 21 years | 5 of 100 (Routine) |
Climate Trend
53 complete years, 1965 to 2025| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1965 | 7.4 C | -0.93 C |
| 1966 | 8.4 C | +0.13 C |
| 1967 | 8.0 C | -0.26 C |
| 1969 | 7.6 C | -0.65 C |
| 1970 | 7.6 C | -0.71 C |
| 1971 | 7.4 C | -0.93 C |
| 1972 | 7.4 C | -0.91 C |
| 1973 | 8.1 C | -0.23 C |
| 1974 | 8.5 C | +0.21 C |
| 1975 | 7.0 C | -1.31 C |
| 1976 | 8.6 C | +0.35 C |
| 1977 | 8.0 C | -0.30 C |
| 1981 | 9.6 C | +1.31 C |
| 1982 | 6.8 C | -1.53 C |
| 1983 | 8.2 C | -0.10 C |
| 1984 | 8.0 C | -0.31 C |
| 1985 | 7.0 C | -1.30 C |
| 1986 | 8.6 C | +0.36 C |
| 1987 | 9.4 C | +1.15 C |
| 1988 | 9.6 C | +1.34 C |
| 1989 | 7.4 C | -0.90 C |
| 1990 | 8.4 C | +0.08 C |
| 1991 | 8.6 C | +0.28 C |
| 1992 | 8.8 C | +0.53 C |
| 1993 | 6.3 C | -1.95 C |
| 1994 | 8.7 C | +0.45 C |
| 1995 | 8.0 C | -0.24 C |
| 1996 | 6.7 C | -1.54 C |
| 1998 | 9.2 C | +0.87 C |
| 1999 | 9.6 C | +1.36 C |
| 2000 | 8.4 C | +0.10 C |
| 2001 | 9.3 C | +1.00 C |
| 2002 | 8.2 C | -0.09 C |
| 2003 | 9.1 C | +0.79 C |
| 2004 | 9.4 C | +1.13 C |
| 2005 | 9.2 C | +0.89 C |
| 2006 | 9.8 C | +1.56 C |
| 2007 | 8.8 C | +0.52 C |
| 2008 | 7.5 C | -0.76 C |
| 2009 | 7.5 C | -0.77 C |
| 2010 | 8.2 C | -0.08 C |
| 2011 | 8.0 C | -0.25 C |
| 2013 | 8.2 C | -0.13 C |
| 2015 | 9.5 C | +1.23 C |
| 2016 | 9.5 C | +1.18 C |
| 2017 | 8.4 C | +0.13 C |
| 2018 | 7.5 C | -0.74 C |
| 2019 | 6.6 C | -1.73 C |
| 2020 | 8.9 C | +0.59 C |
| 2022 | 7.9 C | -0.42 C |
| 2023 | 8.0 C | -0.27 C |
| 2024 | 9.7 C | +1.45 C |
| 2025 | 8.6 C | +0.29 C |
The fitted trend in annual mean temperature here over 1965 to 2025 is 0.13 C (-0.01 to 0.27) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.24 F (-0.01 to 0.49) per decade. The slope is a straight line fitted to 53 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.13 C (-0.01 to 0.27) per decade | 0.24 F (-0.01 to 0.49) per decade | 1965 to 2025 | 53 | Not clearly different from zero |
| Mean daily maximum | 0.16 C (-0.01 to 0.33) per decade | 0.29 F (-0.01 to 0.59) per decade | 1965 to 2025 | 53 | Not clearly different from zero |
| Mean daily minimum | 0.10 C (-0.02 to 0.22) per decade | 0.18 F (-0.04 to 0.40) per decade | 1965 to 2025 | 53 | 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
1964 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 43.9 C (111.0 F) | 2006 | 38.9 C (102.0 F) | 63 |
| Coldest night (TNn) | -37.8 C (-36.0 F) | 1983 | -28.9 C (-20.0 F) | 63 |
| Wettest day (Rx1day) | 59.7 mm (2.4 in) | 1993 | 35.6 mm (1.4 in) | 63 |
| Wettest five days (Rx5day) | 118.8 mm (4.7 in) | 1978 | 50.5 mm (2.0 in) | 63 |
| Longest dry spell (CDD) | 52 days | 2012 | 29 days | 63 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1964 | 32.8 C (91.0 F) |
| 1965 | 39.4 C (102.9 F) |
| 1966 | 40.6 C (105.1 F) |
| 1967 | 37.2 C (99.0 F) |
| 1968 | 36.1 C (97.0 F) |
| 1969 | 38.9 C (102.0 F) |
| 1970 | 38.9 C (102.0 F) |
| 1971 | 38.3 C (100.9 F) |
| 1972 | 38.9 C (102.0 F) |
| 1973 | 39.4 C (102.9 F) |
| 1974 | 37.8 C (100.0 F) |
| 1975 | 38.9 C (102.0 F) |
| 1976 | 37.8 C (100.0 F) |
| 1977 | 40.0 C (104.0 F) |
| 1978 | 40.0 C (104.0 F) |
| 1979 | 40.6 C (105.1 F) |
| 1980 | 39.4 C (102.9 F) |
| 1981 | 41.1 C (106.0 F) |
| 1982 | 37.8 C (100.0 F) |
| 1983 | 40.6 C (105.1 F) |
| 1984 | 38.9 C (102.0 F) |
| 1985 | 38.9 C (102.0 F) |
| 1986 | 38.3 C (100.9 F) |
| 1987 | 35.0 C (95.0 F) |
| 1988 | 42.2 C (108.0 F) |
| 1989 | 42.2 C (108.0 F) |
| 1990 | 39.4 C (102.9 F) |
| 1991 | 38.9 C (102.0 F) |
| 1992 | 37.2 C (99.0 F) |
| 1993 | 36.1 C (97.0 F) |
| 1994 | 38.3 C (100.9 F) |
| 1995 | 39.4 C (102.9 F) |
| 1996 | 38.3 C (100.9 F) |
| 1997 | 37.2 C (99.0 F) |
| 1998 | 40.6 C (105.1 F) |
| 1999 | 40.0 C (104.0 F) |
| 2000 | 39.4 C (102.9 F) |
| 2001 | 40.0 C (104.0 F) |
| 2002 | 42.2 C (108.0 F) |
| 2003 | 40.6 C (105.1 F) |
| 2004 | 40.0 C (104.0 F) |
| 2005 | 41.7 C (107.1 F) |
| 2006 | 43.9 C (111.0 F) |
| 2007 | 39.4 C (102.9 F) |
| 2008 | 38.3 C (100.9 F) |
| 2009 | 37.2 C (99.0 F) |
| 2010 | 38.3 C (100.9 F) |
| 2011 | 37.8 C (100.0 F) |
| 2012 | 40.0 C (104.0 F) |
| 2013 | 38.9 C (102.0 F) |
| 2014 | 37.8 C (100.0 F) |
| 2015 | 37.8 C (100.0 F) |
| 2016 | 40.0 C (104.0 F) |
| 2017 | 38.9 C (102.0 F) |
| 2018 | 39.4 C (102.9 F) |
| 2019 | 35.0 C (95.0 F) |
| 2020 | 38.3 C (100.9 F) |
| 2021 | 41.7 C (107.1 F) |
| 2022 | 39.4 C (102.9 F) |
| 2023 | 37.8 C (100.0 F) |
| 2024 | 41.1 C (106.0 F) |
| 2025 | 39.4 C (102.9 F) |
| 2026 | 40.6 C (105.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1964 | -33.9 C (-29.0 F) |
| 1965 | -26.7 C (-16.1 F) |
| 1966 | -27.2 C (-17.0 F) |
| 1967 | -27.2 C (-17.0 F) |
| 1968 | -32.8 C (-27.0 F) |
| 1969 | -27.8 C (-18.0 F) |
| 1970 | -30.6 C (-23.1 F) |
| 1971 | -30.0 C (-22.0 F) |
| 1972 | -33.3 C (-27.9 F) |
| 1973 | -32.8 C (-27.0 F) |
| 1974 | -30.6 C (-23.1 F) |
| 1975 | -26.7 C (-16.1 F) |
| 1976 | -27.2 C (-17.0 F) |
| 1977 | -32.2 C (-26.0 F) |
| 1978 | -35.0 C (-31.0 F) |
| 1979 | -33.9 C (-29.0 F) |
| 1980 | -30.0 C (-22.0 F) |
| 1981 | -29.4 C (-20.9 F) |
| 1982 | -31.7 C (-25.1 F) |
| 1983 | -37.8 C (-36.0 F) |
| 1984 | -30.6 C (-23.1 F) |
| 1985 | -31.7 C (-25.1 F) |
| 1986 | -28.9 C (-20.0 F) |
| 1987 | -20.6 C (-5.1 F) |
| 1988 | -25.0 C (-13.0 F) |
| 1989 | -36.1 C (-33.0 F) |
| 1990 | -37.8 C (-36.0 F) |
| 1991 | -27.2 C (-17.0 F) |
| 1992 | -26.7 C (-16.1 F) |
| 1993 | -31.1 C (-24.0 F) |
| 1994 | -27.8 C (-18.0 F) |
| 1995 | -26.1 C (-15.0 F) |
| 1996 | -37.2 C (-35.0 F) |
| 1997 | -36.7 C (-34.1 F) |
| 1998 | -30.6 C (-23.1 F) |
| 1999 | -20.0 C (-4.0 F) |
| 2000 | -26.7 C (-16.1 F) |
| 2001 | -27.2 C (-17.0 F) |
| 2002 | -23.3 C (-9.9 F) |
| 2003 | -27.8 C (-18.0 F) |
| 2004 | -28.3 C (-18.9 F) |
| 2005 | -29.4 C (-20.9 F) |
| 2006 | -28.3 C (-18.9 F) |
| 2007 | -26.7 C (-16.1 F) |
| 2008 | -29.4 C (-20.9 F) |
| 2009 | -27.8 C (-18.0 F) |
| 2010 | -24.4 C (-11.9 F) |
| 2011 | -28.3 C (-18.9 F) |
| 2012 | -21.1 C (-6.0 F) |
| 2013 | -28.9 C (-20.0 F) |
| 2014 | -31.7 C (-25.1 F) |
| 2015 | -24.4 C (-11.9 F) |
| 2016 | -28.9 C (-20.0 F) |
| 2017 | -27.8 C (-18.0 F) |
| 2018 | -26.7 C (-16.1 F) |
| 2019 | -28.3 C (-18.9 F) |
| 2020 | -20.6 C (-5.1 F) |
| 2021 | -30.0 C (-22.0 F) |
| 2022 | -33.9 C (-29.0 F) |
| 2023 | -30.6 C (-23.1 F) |
| 2024 | -36.1 C (-33.0 F) |
| 2025 | -31.1 C (-24.0 F) |
| 2026 | -24.4 C (-11.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1964 | 15.2 mm (0.6 in) |
| 1965 | 45.0 mm (1.8 in) |
| 1966 | 15.5 mm (0.6 in) |
| 1967 | 34.3 mm (1.4 in) |
| 1968 | 41.1 mm (1.6 in) |
| 1969 | 32.0 mm (1.3 in) |
| 1970 | 31.8 mm (1.3 in) |
| 1971 | 30.7 mm (1.2 in) |
| 1972 | 25.1 mm (1.0 in) |
| 1973 | 28.7 mm (1.1 in) |
| 1974 | 48.3 mm (1.9 in) |
| 1975 | 38.9 mm (1.5 in) |
| 1976 | 44.5 mm (1.8 in) |
| 1977 | 36.3 mm (1.4 in) |
| 1978 | 55.9 mm (2.2 in) |
| 1979 | 18.5 mm (0.7 in) |
| 1980 | 47.0 mm (1.9 in) |
| 1981 | 44.2 mm (1.7 in) |
| 1982 | 38.6 mm (1.5 in) |
| 1983 | 14.2 mm (0.6 in) |
| 1984 | 20.8 mm (0.8 in) |
| 1985 | 21.6 mm (0.9 in) |
| 1986 | 41.9 mm (1.6 in) |
| 1987 | 31.8 mm (1.3 in) |
| 1988 | 29.7 mm (1.2 in) |
| 1989 | 19.1 mm (0.8 in) |
| 1990 | 35.8 mm (1.4 in) |
| 1991 | 33.0 mm (1.3 in) |
| 1992 | 40.1 mm (1.6 in) |
| 1993 | 59.7 mm (2.4 in) |
| 1994 | 35.6 mm (1.4 in) |
| 1995 | 35.1 mm (1.4 in) |
| 1996 | 46.0 mm (1.8 in) |
| 1997 | 21.6 mm (0.9 in) |
| 1998 | 37.6 mm (1.5 in) |
| 1999 | 24.6 mm (1.0 in) |
| 2000 | 20.1 mm (0.8 in) |
| 2001 | 37.6 mm (1.5 in) |
| 2002 | 47.2 mm (1.9 in) |
| 2003 | 33.0 mm (1.3 in) |
| 2004 | 38.6 mm (1.5 in) |
| 2005 | 33.5 mm (1.3 in) |
| 2006 | 35.3 mm (1.4 in) |
| 2007 | 57.4 mm (2.3 in) |
| 2008 | 47.8 mm (1.9 in) |
| 2009 | 33.0 mm (1.3 in) |
| 2010 | 51.6 mm (2.0 in) |
| 2011 | 35.1 mm (1.4 in) |
| 2012 | 28.4 mm (1.1 in) |
| 2013 | 43.9 mm (1.7 in) |
| 2014 | 28.7 mm (1.1 in) |
| 2015 | 21.6 mm (0.9 in) |
| 2016 | 37.6 mm (1.5 in) |
| 2017 | 46.5 mm (1.8 in) |
| 2018 | 46.7 mm (1.8 in) |
| 2019 | 22.9 mm (0.9 in) |
| 2020 | 15.5 mm (0.6 in) |
| 2021 | 43.2 mm (1.7 in) |
| 2022 | 45.0 mm (1.8 in) |
| 2023 | 40.1 mm (1.6 in) |
| 2024 | 38.9 mm (1.5 in) |
| 2025 | 45.0 mm (1.8 in) |
| 2026 | 24.6 mm (1.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1964 | 26.1 mm (1.0 in) |
| 1965 | 94.3 mm (3.7 in) |
| 1966 | 24.1 mm (0.9 in) |
| 1967 | 47.4 mm (1.9 in) |
| 1968 | 41.4 mm (1.6 in) |
| 1969 | 70.2 mm (2.8 in) |
| 1970 | 40.9 mm (1.6 in) |
| 1971 | 52.6 mm (2.1 in) |
| 1972 | 28.9 mm (1.1 in) |
| 1973 | 49.1 mm (1.9 in) |
| 1974 | 48.8 mm (1.9 in) |
| 1975 | 56.1 mm (2.2 in) |
| 1976 | 87.1 mm (3.4 in) |
| 1977 | 50.5 mm (2.0 in) |
| 1978 | 118.8 mm (4.7 in) |
| 1979 | 34.1 mm (1.3 in) |
| 1980 | 50.3 mm (2.0 in) |
| 1981 | 84.9 mm (3.3 in) |
| 1982 | 43.9 mm (1.7 in) |
| 1983 | 21.1 mm (0.8 in) |
| 1984 | 43.5 mm (1.7 in) |
| 1985 | 34.3 mm (1.4 in) |
| 1986 | 56.2 mm (2.2 in) |
| 1987 | 40.4 mm (1.6 in) |
| 1988 | 40.4 mm (1.6 in) |
| 1989 | 29.5 mm (1.2 in) |
| 1990 | 44.9 mm (1.8 in) |
| 1991 | 53.0 mm (2.1 in) |
| 1992 | 56.1 mm (2.2 in) |
| 1993 | 77.5 mm (3.1 in) |
| 1994 | 58.8 mm (2.3 in) |
| 1995 | 59.8 mm (2.4 in) |
| 1996 | 64.3 mm (2.5 in) |
| 1997 | 45.2 mm (1.8 in) |
| 1998 | 50.3 mm (2.0 in) |
| 1999 | 39.9 mm (1.6 in) |
| 2000 | 25.4 mm (1.0 in) |
| 2001 | 50.6 mm (2.0 in) |
| 2002 | 90.6 mm (3.6 in) |
| 2003 | 68.7 mm (2.7 in) |
| 2004 | 41.2 mm (1.6 in) |
| 2005 | 95.4 mm (3.8 in) |
| 2006 | 41.9 mm (1.6 in) |
| 2007 | 108.7 mm (4.3 in) |
| 2008 | 95.3 mm (3.8 in) |
| 2009 | 41.6 mm (1.6 in) |
| 2010 | 80.1 mm (3.2 in) |
| 2011 | 72.3 mm (2.8 in) |
| 2012 | 34.0 mm (1.3 in) |
| 2013 | 67.5 mm (2.7 in) |
| 2014 | 45.8 mm (1.8 in) |
| 2015 | 34.0 mm (1.3 in) |
| 2016 | 60.7 mm (2.4 in) |
| 2017 | 55.9 mm (2.2 in) |
| 2018 | 52.6 mm (2.1 in) |
| 2019 | 53.8 mm (2.1 in) |
| 2020 | 30.8 mm (1.2 in) |
| 2021 | 58.5 mm (2.3 in) |
| 2022 | 52.6 mm (2.1 in) |
| 2023 | 57.1 mm (2.2 in) |
| 2024 | 39.4 mm (1.6 in) |
| 2025 | 76.8 mm (3.0 in) |
| 2026 | 32.7 mm (1.3 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1964 | 19 days |
| 1965 | 42 days |
| 1966 | 24 days |
| 1967 | 33 days |
| 1968 | 16 days |
| 1969 | 42 days |
| 1970 | 27 days |
| 1971 | 31 days |
| 1972 | 26 days |
| 1973 | 34 days |
| 1974 | 24 days |
| 1975 | 32 days |
| 1976 | 37 days |
| 1977 | 24 days |
| 1978 | 33 days |
| 1979 | 30 days |
| 1980 | 24 days |
| 1981 | 28 days |
| 1982 | 32 days |
| 1983 | 25 days |
| 1984 | 20 days |
| 1985 | 36 days |
| 1986 | 26 days |
| 1987 | 28 days |
| 1988 | 33 days |
| 1989 | 32 days |
| 1990 | 20 days |
| 1991 | 22 days |
| 1992 | 48 days |
| 1993 | 23 days |
| 1994 | 27 days |
| 1995 | 17 days |
| 1996 | 23 days |
| 1997 | 23 days |
| 1998 | 45 days |
| 1999 | 46 days |
| 2000 | 19 days |
| 2001 | 41 days |
| 2002 | 28 days |
| 2003 | 44 days |
| 2004 | 33 days |
| 2005 | 25 days |
| 2006 | 43 days |
| 2007 | 29 days |
| 2008 | 31 days |
| 2009 | 31 days |
| 2010 | 20 days |
| 2011 | 12 days |
| 2012 | 52 days |
| 2013 | 32 days |
| 2014 | 30 days |
| 2015 | 33 days |
| 2016 | 23 days |
| 2017 | 30 days |
| 2018 | 29 days |
| 2019 | 24 days |
| 2020 | 46 days |
| 2021 | 36 days |
| 2022 | 20 days |
| 2023 | 37 days |
| 2024 | 44 days |
| 2025 | 29 days |
| 2026 | 24 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
53 years with a frostAcross 53 years with a frost, the median last spring frost at Leiter 9N falls on 14 May and the median first autumn frost on 27 September, which leaves a median of 138 days between them.
Fitted over all years, the growing season changes by +3.0 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1992 to 2025) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 14 May | n/a | 13 May | n/a | -0.6 days per decade |
| First autumn frost | 27 September | n/a | 29 September | n/a | +2.4 days per decade |
| Growing days | 138 days | n/a | 142 days | n/a | +3.0 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
58 years, 1965 to 2025A day with at least 36.6 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 57.6 mm (2.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 36.6 mm (1.4 in) | |
| 5 years | 45.7 mm (1.8 in) | |
| 10 years | 50.0 mm (2.0 in) | |
| 25 years | 53.9 mm (2.1 in) | |
| 50 years | 56.0 mm (2.2 in) | |
| 100 years | 57.6 mm (2.3 in) | Longer than the 58 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, 58 years of values from 1965 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: 59.7 mm (2.4 in) in 1993; 57.4 mm (2.3 in) in 2007; 55.9 mm (2.2 in) in 1978.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2008 to 2025 against 1961 to 1990Over 2008 to 2025, Leiter 9N had a mean temperature of 8.3 C (46.9 F) and 410.5 mm (16.2 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Thiokol Propulsion F S (United States, 606 km away), Rapid City Rgnl AP (United States, 272 km away) and Hemingford (United States, 382 km away).
| Twin station | Country | Distance away | Mean temperature, 1961-1990 | Rain a year, 1961-1990 | Climate difference |
|---|---|---|---|---|---|
| Thiokol Propulsion F S | United States | 606 km (377 mi) | 8.2 C (46.8 F) | 364.0 mm (14.3 in) | 0.83 |
| Rapid City Rgnl AP | United States | 272 km (169 mi) | 8.2 C (46.8 F) | 423.3 mm (16.7 in) | 0.93 |
| Hemingford | United States | 382 km (237 mi) | 8.5 C (47.3 F) | 438.8 mm (17.3 in) | 0.95 |
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-12).