Ninety Nine Is Weather Records (USC00386293)
Record envelope, standing records and threshold days for Ninety Nine Is (USC00386293), South Carolina, United States, with 87 years of record.
Key Facts for Ninety Nine Is
- Ninety Nine Is (USC00386293) is a weather station in South Carolina, United States at 35.03 latitude and -81.49 longitude, 152 m (500 ft) above sea level.
- The station reports from 1940 to 2026, 87 years of record.
- 1,464 records set at Ninety Nine Is still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Ninety Nine Is set a daily record precipitation of 39.4 mm (1.6 in) on 20 September 2026 (provisional).
Provisional Records
Records set in the last 60 days are provisional until they clear the revision window.
About the Station
- Location: South Carolina, United States, 35.03 latitude, -81.49 longitude.
- Elevation: 152 m (500 ft).
- Period of record: 1940 to 2026, 87 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 26.1 C (79.0 F) | -20.0 C (-4.0 F) | n/a | n/a |
| Feb | 26.7 C (80.1 F) | -16.7 C (1.9 F) | n/a | n/a |
| Mar | 30.6 C (87.1 F) | -13.3 C (8.1 F) | n/a | n/a |
| Apr | 33.3 C (91.9 F) | -7.8 C (18.0 F) | n/a | n/a |
| May | 36.1 C (97.0 F) | -3.3 C (26.1 F) | n/a | n/a |
| Jun | 37.8 C (100.0 F) | 3.3 C (37.9 F) | n/a | n/a |
| Jul | 40.0 C (104.0 F) | 10.0 C (50.0 F) | n/a | n/a |
| Aug | 41.1 C (106.0 F) | 8.3 C (46.9 F) | n/a | n/a |
| Sep | 36.7 C (98.1 F) | 0.6 C (33.1 F) | n/a | n/a |
| Oct | 35.6 C (96.1 F) | -7.2 C (19.0 F) | n/a | n/a |
| Nov | 30.6 C (87.1 F) | -12.8 C (9.0 F) | n/a | n/a |
| Dec | 26.7 C (80.1 F) | -20.0 C (-4.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1960 | 5 |
| 1961 | 30 |
| 1962 | 44 |
| 1963 | 41 |
| 1964 | 26 |
| 1965 | 26 |
| 1966 | 35 |
| 1967 | 38 |
| 1968 | 26 |
| 1969 | 22 |
| 1970 | 35 |
| 1971 | 26 |
| 1972 | 19 |
| 1973 | 23 |
| 1974 | 39 |
| 1975 | 22 |
| 1976 | 39 |
| 1977 | 39 |
| 1978 | 17 |
| 1979 | 22 |
| 1980 | 33 |
| 1981 | 29 |
| 1982 | 25 |
| 1983 | 38 |
| 1984 | 33 |
| 1985 | 30 |
| 1986 | 25 |
| 1987 | 10 |
| 1988 | 22 |
| 1989 | 29 |
| 1990 | 9 |
| 1991 | 31 |
| 1992 | 21 |
| 1993 | 17 |
| 1994 | 17 |
| 1995 | 17 |
| 1996 | 25 |
| 1997 | 34 |
| 1998 | 25 |
| 1999 | 28 |
| 2000 | 31 |
| 2001 | 17 |
| 2002 | 22 |
| 2003 | 16 |
| 2004 | 13 |
| 2005 | 14 |
| 2006 | 8 |
| 2007 | 32 |
| 2008 | 18 |
| 2009 | 12 |
| 2010 | 30 |
| 2011 | 21 |
| 2012 | 16 |
| 2013 | 13 |
| 2014 | 20 |
| 2015 | 21 |
| 2016 | 10 |
| 2017 | 27 |
| 2018 | 26 |
| 2019 | 21 |
| 2020 | 4 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1985-08-17 | Record daily precipitation | Record daily precipitation 181.9 mm (7.2 in) |
| 1988-01-07 | Record daily snowfall | Record daily snowfall 33.0 cm (13.0 in) |
| 1988-01-07 | Record snow depth | Record snow depth 33.0 cm (13.0 in) |
| 2007-08-12 | Record high minimum temperature | Record high minimum temperature 25.0 C (77.0 F) |
Wettest Day of Each Month
Aug: 181.9 mm (7.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 81.3 mm (3.2 in) | 10 January 2024 |
| Feb | 78.7 mm (3.1 in) | 6 February 1955 |
| Mar | 75.2 mm (3.0 in) | 29 March 1991 |
| Apr | 117.3 mm (4.6 in) | 28 April 2023 |
| May | 99.8 mm (3.9 in) | 22 May 2003 |
| Jun | 104.6 mm (4.1 in) | 1 June 1964 |
| Jul | 127.0 mm (5.0 in) | 7 July 1967 |
| Aug | 181.9 mm (7.2 in) | 17 August 1985 |
| Sep | 114.3 mm (4.5 in) | 6 September 1942 |
| Oct | 181.1 mm (7.1 in) | 12 October 1990 |
| Nov | 108.0 mm (4.3 in) | 28 November 1948 |
| Dec | 85.6 mm (3.4 in) | 28 December 1958 |
Period of Record Coverage
1960 to 2020| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1960 | 92 | 25% | No |
| 1961 | 365 | 100% | Yes |
| 1962 | 354 | 97% | Yes |
| 1963 | 363 | 99% | Yes |
| 1964 | 335 | 92% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 334 | 92% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 365 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 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 | 364 | 100% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 364 | 100% | Yes |
| 1992 | 362 | 99% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 362 | 99% | Yes |
| 1996 | 359 | 98% | Yes |
| 1997 | 363 | 99% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 359 | 98% | Yes |
| 2000 | 364 | 99% | Yes |
| 2001 | 359 | 98% | Yes |
| 2002 | 358 | 98% | Yes |
| 2003 | 352 | 96% | Yes |
| 2004 | 357 | 98% | Yes |
| 2005 | 356 | 98% | Yes |
| 2006 | 358 | 98% | Yes |
| 2007 | 357 | 98% | Yes |
| 2008 | 355 | 97% | Yes |
| 2009 | 360 | 99% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 363 | 99% | Yes |
| 2012 | 366 | 100% | Yes |
| 2013 | 365 | 100% | Yes |
| 2014 | 365 | 100% | Yes |
| 2015 | 365 | 100% | Yes |
| 2016 | 325 | 89% | No |
| 2017 | 365 | 100% | Yes |
| 2018 | 365 | 100% | Yes |
| 2019 | 365 | 100% | Yes |
| 2020 | 64 | 17% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 20 September 2026 | Ninety Nine Is, US | daily rain (Provisional) | 39.4 mm (1.6 in) | 15.3 mm (0.6 in) | 83 years | 40 of 100 (Notable) |
| 5 August 2026 | Ninety Nine Is, US | daily rain | 41.7 mm (1.6 in) | 3.6 mm (0.14 in) | 0 years | 9 of 100 (Routine) |
| 23 May 2026 | Ninety Nine Is, US | daily rain | 43.2 mm (1.7 in) | 12.7 mm (0.5 in) | 68 years | 37 of 100 (Notable) |
| 7 May 2026 | Ninety Nine Is, US | daily rain | 48.3 mm (1.9 in) | 7.9 mm (0.31 in) | 48 years | 27 of 100 (Routine) |
| 5 August 2025 | Ninety Nine Is, US | daily rain | 38.1 mm (1.5 in) | 13.2 mm (0.5 in) | 14 years | 18 of 100 (Routine) |
| 13 June 2025 | Ninety Nine Is, US | daily rain | 43.9 mm (1.7 in) | 3.5 mm (0.14 in) | 63 years | 28 of 100 (Routine) |
| 8 April 2025 | Ninety Nine Is, US | daily rain | 43.2 mm (1.7 in) | 6.1 mm (0.24 in) | 60 years | 30 of 100 (Routine) |
| 9 August 2024 | Ninety Nine Is, US | daily rain | 62.2 mm (2.4 in) | 3.5 mm (0.14 in) | 54 years | 25 of 100 (Routine) |
| 10 January 2024 | Ninety Nine Is, US | monthly rain | 81.3 mm (3.2 in) | 12.0 mm (0.5 in) | 40 years | 40 of 100 (Notable) |
| 27 December 2023 | Ninety Nine Is, US | monthly rain (Tie) | 85.6 mm (3.4 in) | tie | 64 years | 9 of 100 (Routine) |
| 21 October 2023 | Ninety Nine Is, US | daily rain | 20.1 mm (0.8 in) | 1.0 mm (0.04 in) | 37 years | 19 of 100 (Routine) |
| 24 July 2023 | Ninety Nine Is, US | daily rain | 74.2 mm (2.9 in) | 44.2 mm (1.7 in) | 20 years | 45 of 100 (Notable) |
| 22 June 2023 | Ninety Nine Is, US | daily rain | 26.7 mm (1.1 in) | 1.3 mm (0.05 in) | 45 years | 22 of 100 (Routine) |
| 28 April 2023 | Ninety Nine Is, US | monthly rain | 117.3 mm (4.6 in) | 42.1 mm (1.7 in) | 20 years | 58 of 100 (Notable) |
| 12 February 2023 | Ninety Nine Is, US | daily rain | 41.9 mm (1.6 in) | 11.7 mm (0.5 in) | 23 years | 23 of 100 (Routine) |
| 4 January 2023 | Ninety Nine Is, US | daily rain | 28.7 mm (1.1 in) | 1.8 mm (0.07 in) | 51 years | 24 of 100 (Routine) |
| 9 March 2022 | Ninety Nine Is, US | daily rain | 53.1 mm (2.1 in) | 33.3 mm (1.3 in) | 24 years | 39 of 100 (Notable) |
| 3 January 2022 | Ninety Nine Is, US | daily rain | 53.3 mm (2.1 in) | 6.3 mm (0.25 in) | 78 years | 36 of 100 (Notable) |
| 18 August 2021 | Ninety Nine Is, US | daily rain | 36.6 mm (1.4 in) | 17.5 mm (0.7 in) | 35 years | 26 of 100 (Routine) |
| 27 July 2021 | Ninety Nine Is, US | daily rain | 49.5 mm (1.9 in) | 13.9 mm (0.5 in) | 79 years | 40 of 100 (Notable) |
Climate Trend
56 complete years, 1961 to 2019| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1961 | 14.6 C | -0.21 C |
| 1962 | 14.7 C | -0.09 C |
| 1963 | 14.1 C | -0.70 C |
| 1965 | 15.1 C | +0.25 C |
| 1966 | 14.2 C | -0.60 C |
| 1967 | 14.4 C | -0.45 C |
| 1968 | 14.3 C | -0.48 C |
| 1970 | 15.1 C | +0.31 C |
| 1971 | 15.1 C | +0.27 C |
| 1972 | 14.8 C | -0.04 C |
| 1973 | 15.3 C | +0.52 C |
| 1974 | 15.4 C | +0.53 C |
| 1975 | 15.5 C | +0.72 C |
| 1976 | 14.1 C | -0.75 C |
| 1977 | 15.0 C | +0.13 C |
| 1978 | 14.5 C | -0.37 C |
| 1979 | 14.5 C | -0.33 C |
| 1980 | 14.6 C | -0.18 C |
| 1981 | 14.3 C | -0.53 C |
| 1982 | 15.2 C | +0.39 C |
| 1983 | 14.6 C | -0.25 C |
| 1984 | 15.1 C | +0.24 C |
| 1985 | 15.3 C | +0.49 C |
| 1986 | 15.4 C | +0.62 C |
| 1987 | 14.6 C | -0.20 C |
| 1988 | 13.8 C | -1.07 C |
| 1989 | 14.4 C | -0.38 C |
| 1990 | 15.9 C | +1.03 C |
| 1991 | 15.4 C | +0.55 C |
| 1992 | 14.3 C | -0.56 C |
| 1993 | 14.7 C | -0.15 C |
| 1994 | 14.6 C | -0.20 C |
| 1995 | 14.5 C | -0.29 C |
| 1996 | 13.7 C | -1.10 C |
| 1997 | 13.4 C | -1.38 C |
| 1998 | 16.0 C | +1.19 C |
| 1999 | 15.4 C | +0.60 C |
| 2000 | 14.8 C | -0.04 C |
| 2001 | 15.2 C | +0.38 C |
| 2002 | 15.3 C | +0.46 C |
| 2003 | 14.4 C | -0.45 C |
| 2004 | 14.9 C | +0.03 C |
| 2005 | 15.0 C | +0.14 C |
| 2006 | 15.0 C | +0.19 C |
| 2007 | 15.5 C | +0.66 C |
| 2008 | 14.6 C | -0.19 C |
| 2009 | 14.6 C | -0.21 C |
| 2010 | 14.6 C | -0.21 C |
| 2011 | 15.2 C | +0.42 C |
| 2012 | 15.7 C | +0.83 C |
| 2013 | 14.3 C | -0.50 C |
| 2014 | 14.3 C | -0.55 C |
| 2015 | 15.6 C | +0.73 C |
| 2017 | 15.4 C | +0.56 C |
| 2018 | 14.9 C | +0.09 C |
| 2019 | 15.2 C | +0.36 C |
The fitted trend in annual mean temperature here over 1961 to 2019 is 0.06 C (-0.03 to 0.15) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.3) per decade. The slope is a straight line fitted to 56 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.06 C (-0.03 to 0.15) per decade | 0.1 F (-0.1 to 0.3) per decade | 1961 to 2019 | 56 | Not clearly different from zero |
| Mean daily maximum | -0.11 C (-0.22 to 0.00) per decade | -0.20 F (-0.40 to 0.00) per decade | 1961 to 2019 | 56 | Fall |
| Mean daily minimum | 0.2 C (0.1 to 0.3) per decade | 0.4 F (0.2 to 0.6) per decade | 1961 to 2019 | 56 | 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
1940 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.1 C (106.0 F) | 1983 | 36.1 C (97.0 F) | 61 |
| Coldest night (TNn) | -20.0 C (-4.0 F) | 1962 | -13.9 C (7.0 F) | 61 |
| Wettest day (Rx1day) | 181.9 mm (7.2 in) | 1985 | 72.4 mm (2.9 in) | 87 |
| Wettest five days (Rx5day) | 260.0 mm (10.2 in) | 1994 | 115.1 mm (4.5 in) | 87 |
| Longest dry spell (CDD) | 40 days | 2000 | 21 days | 87 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1940 | n/a |
| 1941 | n/a |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 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 | n/a |
| 1959 | n/a |
| 1960 | 31.1 C (88.0 F) |
| 1961 | 35.6 C (96.1 F) |
| 1962 | 36.7 C (98.1 F) |
| 1963 | 37.8 C (100.0 F) |
| 1964 | 37.8 C (100.0 F) |
| 1965 | 35.0 C (95.0 F) |
| 1966 | 37.8 C (100.0 F) |
| 1967 | 34.4 C (93.9 F) |
| 1968 | 38.9 C (102.0 F) |
| 1969 | 38.3 C (100.9 F) |
| 1970 | 37.8 C (100.0 F) |
| 1971 | 35.0 C (95.0 F) |
| 1972 | 36.1 C (97.0 F) |
| 1973 | 35.0 C (95.0 F) |
| 1974 | 34.4 C (93.9 F) |
| 1975 | 37.2 C (99.0 F) |
| 1976 | 36.1 C (97.0 F) |
| 1977 | 38.9 C (102.0 F) |
| 1978 | 37.2 C (99.0 F) |
| 1979 | 35.6 C (96.1 F) |
| 1980 | 38.3 C (100.9 F) |
| 1981 | 37.2 C (99.0 F) |
| 1982 | 35.0 C (95.0 F) |
| 1983 | 41.1 C (106.0 F) |
| 1984 | 36.7 C (98.1 F) |
| 1985 | 37.2 C (99.0 F) |
| 1986 | 40.0 C (104.0 F) |
| 1987 | 36.1 C (97.0 F) |
| 1988 | 37.8 C (100.0 F) |
| 1989 | 33.9 C (93.0 F) |
| 1990 | 35.6 C (96.1 F) |
| 1991 | 35.0 C (95.0 F) |
| 1992 | 35.6 C (96.1 F) |
| 1993 | 36.7 C (98.1 F) |
| 1994 | 32.8 C (91.0 F) |
| 1995 | 35.6 C (96.1 F) |
| 1996 | 33.9 C (93.0 F) |
| 1997 | 35.6 C (96.1 F) |
| 1998 | 36.1 C (97.0 F) |
| 1999 | 38.9 C (102.0 F) |
| 2000 | 37.2 C (99.0 F) |
| 2001 | 34.4 C (93.9 F) |
| 2002 | 36.1 C (97.0 F) |
| 2003 | 32.8 C (91.0 F) |
| 2004 | 34.4 C (93.9 F) |
| 2005 | 37.2 C (99.0 F) |
| 2006 | 35.6 C (96.1 F) |
| 2007 | 39.4 C (102.9 F) |
| 2008 | 37.2 C (99.0 F) |
| 2009 | 35.6 C (96.1 F) |
| 2010 | 37.2 C (99.0 F) |
| 2011 | 37.8 C (100.0 F) |
| 2012 | 39.4 C (102.9 F) |
| 2013 | 33.9 C (93.0 F) |
| 2014 | 34.4 C (93.9 F) |
| 2015 | 36.7 C (98.1 F) |
| 2016 | 36.1 C (97.0 F) |
| 2017 | 35.0 C (95.0 F) |
| 2018 | 33.3 C (91.9 F) |
| 2019 | 35.6 C (96.1 F) |
| 2020 | 22.8 C (73.0 F) |
| 2021 | n/a |
| 2022 | n/a |
| 2023 | n/a |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1940 | n/a |
| 1941 | n/a |
| 1942 | n/a |
| 1943 | n/a |
| 1944 | n/a |
| 1945 | n/a |
| 1946 | n/a |
| 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 | n/a |
| 1959 | n/a |
| 1960 | -13.9 C (7.0 F) |
| 1961 | -15.6 C (3.9 F) |
| 1962 | -20.0 C (-4.0 F) |
| 1963 | -14.4 C (6.1 F) |
| 1964 | -14.4 C (6.1 F) |
| 1965 | -12.2 C (10.0 F) |
| 1966 | -15.6 C (3.9 F) |
| 1967 | -16.7 C (1.9 F) |
| 1968 | -14.4 C (6.1 F) |
| 1969 | -15.0 C (5.0 F) |
| 1970 | -18.9 C (-2.0 F) |
| 1971 | -13.9 C (7.0 F) |
| 1972 | -12.8 C (9.0 F) |
| 1973 | -12.2 C (10.0 F) |
| 1974 | -11.1 C (12.0 F) |
| 1975 | -13.3 C (8.1 F) |
| 1976 | -15.0 C (5.0 F) |
| 1977 | -16.7 C (1.9 F) |
| 1978 | -15.6 C (3.9 F) |
| 1979 | -15.0 C (5.0 F) |
| 1980 | -12.8 C (9.0 F) |
| 1981 | -17.2 C (1.0 F) |
| 1982 | -17.2 C (1.0 F) |
| 1983 | -18.3 C (-0.9 F) |
| 1984 | -13.3 C (8.1 F) |
| 1985 | -20.0 C (-4.0 F) |
| 1986 | -15.0 C (5.0 F) |
| 1987 | -10.6 C (12.9 F) |
| 1988 | -14.4 C (6.1 F) |
| 1989 | -12.8 C (9.0 F) |
| 1990 | -8.3 C (17.1 F) |
| 1991 | -11.7 C (10.9 F) |
| 1992 | -10.0 C (14.0 F) |
| 1993 | -11.7 C (10.9 F) |
| 1994 | -16.7 C (1.9 F) |
| 1995 | -15.0 C (5.0 F) |
| 1996 | -16.1 C (3.0 F) |
| 1997 | -15.6 C (3.9 F) |
| 1998 | -16.1 C (3.0 F) |
| 1999 | -12.2 C (10.0 F) |
| 2000 | -13.9 C (7.0 F) |
| 2001 | -15.0 C (5.0 F) |
| 2002 | -12.8 C (9.0 F) |
| 2003 | -17.8 C (0.0 F) |
| 2004 | -10.0 C (14.0 F) |
| 2005 | -13.9 C (7.0 F) |
| 2006 | -11.7 C (10.9 F) |
| 2007 | -10.0 C (14.0 F) |
| 2008 | -12.2 C (10.0 F) |
| 2009 | -13.3 C (8.1 F) |
| 2010 | -13.3 C (8.1 F) |
| 2011 | -12.8 C (9.0 F) |
| 2012 | -10.6 C (12.9 F) |
| 2013 | -8.3 C (17.1 F) |
| 2014 | -14.4 C (6.1 F) |
| 2015 | -16.7 C (1.9 F) |
| 2016 | -11.1 C (12.0 F) |
| 2017 | -10.6 C (12.9 F) |
| 2018 | -16.1 C (3.0 F) |
| 2019 | -9.4 C (15.1 F) |
| 2020 | -8.3 C (17.1 F) |
| 2021 | n/a |
| 2022 | n/a |
| 2023 | n/a |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1940 | 31.8 mm (1.3 in) |
| 1941 | 66.0 mm (2.6 in) |
| 1942 | 114.3 mm (4.5 in) |
| 1943 | 77.5 mm (3.1 in) |
| 1944 | 72.4 mm (2.9 in) |
| 1945 | 92.7 mm (3.6 in) |
| 1946 | 80.0 mm (3.1 in) |
| 1947 | 97.8 mm (3.9 in) |
| 1948 | 108.0 mm (4.3 in) |
| 1949 | 100.3 mm (3.9 in) |
| 1950 | 52.1 mm (2.1 in) |
| 1951 | 63.5 mm (2.5 in) |
| 1952 | 71.1 mm (2.8 in) |
| 1953 | 64.8 mm (2.6 in) |
| 1954 | 49.5 mm (1.9 in) |
| 1955 | 83.8 mm (3.3 in) |
| 1956 | 92.5 mm (3.6 in) |
| 1957 | 95.3 mm (3.8 in) |
| 1958 | 85.6 mm (3.4 in) |
| 1959 | 98.0 mm (3.9 in) |
| 1960 | 63.5 mm (2.5 in) |
| 1961 | 64.0 mm (2.5 in) |
| 1962 | 84.6 mm (3.3 in) |
| 1963 | 95.0 mm (3.7 in) |
| 1964 | 104.6 mm (4.1 in) |
| 1965 | 119.4 mm (4.7 in) |
| 1966 | 71.9 mm (2.8 in) |
| 1967 | 127.0 mm (5.0 in) |
| 1968 | 50.8 mm (2.0 in) |
| 1969 | 60.7 mm (2.4 in) |
| 1970 | 58.7 mm (2.3 in) |
| 1971 | 66.8 mm (2.6 in) |
| 1972 | 74.9 mm (2.9 in) |
| 1973 | 73.9 mm (2.9 in) |
| 1974 | 62.0 mm (2.4 in) |
| 1975 | 98.3 mm (3.9 in) |
| 1976 | 121.2 mm (4.8 in) |
| 1977 | 53.3 mm (2.1 in) |
| 1978 | 66.5 mm (2.6 in) |
| 1979 | 60.5 mm (2.4 in) |
| 1980 | 63.5 mm (2.5 in) |
| 1981 | 71.9 mm (2.8 in) |
| 1982 | 95.3 mm (3.8 in) |
| 1983 | 61.5 mm (2.4 in) |
| 1984 | 69.3 mm (2.7 in) |
| 1985 | 181.9 mm (7.2 in) |
| 1986 | 64.3 mm (2.5 in) |
| 1987 | 102.6 mm (4.0 in) |
| 1988 | 39.9 mm (1.6 in) |
| 1989 | 150.9 mm (5.9 in) |
| 1990 | 181.1 mm (7.1 in) |
| 1991 | 75.2 mm (3.0 in) |
| 1992 | 86.1 mm (3.4 in) |
| 1993 | 82.0 mm (3.2 in) |
| 1994 | 129.0 mm (5.1 in) |
| 1995 | 111.5 mm (4.4 in) |
| 1996 | 52.8 mm (2.1 in) |
| 1997 | 54.9 mm (2.2 in) |
| 1998 | 167.6 mm (6.6 in) |
| 1999 | 80.8 mm (3.2 in) |
| 2000 | 39.9 mm (1.6 in) |
| 2001 | 88.6 mm (3.5 in) |
| 2002 | 63.0 mm (2.5 in) |
| 2003 | 99.8 mm (3.9 in) |
| 2004 | 99.6 mm (3.9 in) |
| 2005 | 91.2 mm (3.6 in) |
| 2006 | 64.3 mm (2.5 in) |
| 2007 | 64.3 mm (2.5 in) |
| 2008 | 102.4 mm (4.0 in) |
| 2009 | 81.3 mm (3.2 in) |
| 2010 | 55.9 mm (2.2 in) |
| 2011 | 49.3 mm (1.9 in) |
| 2012 | 55.1 mm (2.2 in) |
| 2013 | 78.0 mm (3.1 in) |
| 2014 | 114.8 mm (4.5 in) |
| 2015 | 49.3 mm (1.9 in) |
| 2016 | 65.8 mm (2.6 in) |
| 2017 | 42.4 mm (1.7 in) |
| 2018 | 64.5 mm (2.5 in) |
| 2019 | 51.1 mm (2.0 in) |
| 2020 | 50.0 mm (2.0 in) |
| 2021 | 49.5 mm (1.9 in) |
| 2022 | 64.8 mm (2.6 in) |
| 2023 | 117.3 mm (4.6 in) |
| 2024 | 81.3 mm (3.2 in) |
| 2025 | 49.0 mm (1.9 in) |
| 2026 | 48.3 mm (1.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1940 | 42.0 mm (1.7 in) |
| 1941 | 113.0 mm (4.4 in) |
| 1942 | 125.7 mm (4.9 in) |
| 1943 | 125.7 mm (4.9 in) |
| 1944 | 119.5 mm (4.7 in) |
| 1945 | 257.8 mm (10.1 in) |
| 1946 | 138.3 mm (5.4 in) |
| 1947 | 130.8 mm (5.1 in) |
| 1948 | 171.4 mm (6.7 in) |
| 1949 | 152.3 mm (6.0 in) |
| 1950 | 86.4 mm (3.4 in) |
| 1951 | 114.3 mm (4.5 in) |
| 1952 | 118.1 mm (4.6 in) |
| 1953 | 115.5 mm (4.5 in) |
| 1954 | 81.3 mm (3.2 in) |
| 1955 | 105.1 mm (4.1 in) |
| 1956 | 167.2 mm (6.6 in) |
| 1957 | 108.4 mm (4.3 in) |
| 1958 | 122.4 mm (4.8 in) |
| 1959 | 138.1 mm (5.4 in) |
| 1960 | 85.3 mm (3.4 in) |
| 1961 | 141.0 mm (5.6 in) |
| 1962 | 106.4 mm (4.2 in) |
| 1963 | 96.0 mm (3.8 in) |
| 1964 | 143.8 mm (5.7 in) |
| 1965 | 165.7 mm (6.5 in) |
| 1966 | 90.0 mm (3.5 in) |
| 1967 | 179.6 mm (7.1 in) |
| 1968 | 86.5 mm (3.4 in) |
| 1969 | 120.7 mm (4.8 in) |
| 1970 | 129.1 mm (5.1 in) |
| 1971 | 115.9 mm (4.6 in) |
| 1972 | 122.4 mm (4.8 in) |
| 1973 | 115.3 mm (4.5 in) |
| 1974 | 90.5 mm (3.6 in) |
| 1975 | 124.0 mm (4.9 in) |
| 1976 | 207.9 mm (8.2 in) |
| 1977 | 106.7 mm (4.2 in) |
| 1978 | 115.1 mm (4.5 in) |
| 1979 | 96.5 mm (3.8 in) |
| 1980 | 115.8 mm (4.6 in) |
| 1981 | 89.9 mm (3.5 in) |
| 1982 | 123.2 mm (4.9 in) |
| 1983 | 132.1 mm (5.2 in) |
| 1984 | 81.8 mm (3.2 in) |
| 1985 | 194.1 mm (7.6 in) |
| 1986 | 101.6 mm (4.0 in) |
| 1987 | 169.7 mm (6.7 in) |
| 1988 | 65.8 mm (2.6 in) |
| 1989 | 171.7 mm (6.8 in) |
| 1990 | 248.7 mm (9.8 in) |
| 1991 | 89.2 mm (3.5 in) |
| 1992 | 153.9 mm (6.1 in) |
| 1993 | 97.3 mm (3.8 in) |
| 1994 | 260.0 mm (10.2 in) |
| 1995 | 181.6 mm (7.1 in) |
| 1996 | 70.2 mm (2.8 in) |
| 1997 | 83.1 mm (3.3 in) |
| 1998 | 179.3 mm (7.1 in) |
| 1999 | 135.2 mm (5.3 in) |
| 2000 | 79.1 mm (3.1 in) |
| 2001 | 137.1 mm (5.4 in) |
| 2002 | 101.1 mm (4.0 in) |
| 2003 | 134.1 mm (5.3 in) |
| 2004 | 57.6 mm (2.3 in) |
| 2005 | 51.1 mm (2.0 in) |
| 2006 | 67.4 mm (2.7 in) |
| 2007 | 60.9 mm (2.4 in) |
| 2008 | 179.3 mm (7.1 in) |
| 2009 | 120.2 mm (4.7 in) |
| 2010 | 106.6 mm (4.2 in) |
| 2011 | 95.9 mm (3.8 in) |
| 2012 | 109.7 mm (4.3 in) |
| 2013 | 99.4 mm (3.9 in) |
| 2014 | 122.7 mm (4.8 in) |
| 2015 | 86.9 mm (3.4 in) |
| 2016 | 85.7 mm (3.4 in) |
| 2017 | 101.6 mm (4.0 in) |
| 2018 | 105.8 mm (4.2 in) |
| 2019 | 79.0 mm (3.1 in) |
| 2020 | 88.9 mm (3.5 in) |
| 2021 | 80.0 mm (3.1 in) |
| 2022 | 84.9 mm (3.3 in) |
| 2023 | 155.4 mm (6.1 in) |
| 2024 | 120.6 mm (4.7 in) |
| 2025 | 79.0 mm (3.1 in) |
| 2026 | 92.3 mm (3.6 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1940 | 11 days |
| 1941 | 30 days |
| 1942 | 33 days |
| 1943 | 25 days |
| 1944 | 23 days |
| 1945 | 19 days |
| 1946 | 15 days |
| 1947 | 30 days |
| 1948 | 22 days |
| 1949 | 19 days |
| 1950 | 19 days |
| 1951 | 25 days |
| 1952 | 26 days |
| 1953 | 17 days |
| 1954 | 24 days |
| 1955 | 23 days |
| 1956 | 20 days |
| 1957 | 17 days |
| 1958 | 26 days |
| 1959 | 19 days |
| 1960 | 12 days |
| 1961 | 30 days |
| 1962 | 23 days |
| 1963 | 32 days |
| 1964 | 28 days |
| 1965 | 19 days |
| 1966 | 15 days |
| 1967 | 19 days |
| 1968 | 26 days |
| 1969 | 18 days |
| 1970 | 25 days |
| 1971 | 15 days |
| 1972 | 19 days |
| 1973 | 20 days |
| 1974 | 19 days |
| 1975 | 20 days |
| 1976 | 20 days |
| 1977 | 15 days |
| 1978 | 24 days |
| 1979 | 14 days |
| 1980 | 22 days |
| 1981 | 24 days |
| 1982 | 15 days |
| 1983 | 17 days |
| 1984 | 26 days |
| 1985 | 24 days |
| 1986 | 21 days |
| 1987 | 26 days |
| 1988 | 18 days |
| 1989 | 20 days |
| 1990 | 18 days |
| 1991 | 27 days |
| 1992 | 18 days |
| 1993 | 28 days |
| 1994 | 17 days |
| 1995 | 21 days |
| 1996 | 24 days |
| 1997 | 21 days |
| 1998 | 26 days |
| 1999 | 22 days |
| 2000 | 40 days |
| 2001 | 28 days |
| 2002 | 21 days |
| 2003 | 13 days |
| 2004 | 19 days |
| 2005 | 38 days |
| 2006 | 29 days |
| 2007 | 23 days |
| 2008 | 22 days |
| 2009 | 20 days |
| 2010 | 16 days |
| 2011 | 23 days |
| 2012 | 25 days |
| 2013 | 20 days |
| 2014 | 19 days |
| 2015 | 13 days |
| 2016 | 35 days |
| 2017 | 25 days |
| 2018 | 18 days |
| 2019 | 38 days |
| 2020 | 18 days |
| 2021 | 14 days |
| 2022 | 19 days |
| 2023 | 23 days |
| 2024 | 28 days |
| 2025 | 26 days |
| 2026 | 19 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
56 years with a frostAcross 56 years with a frost, the median last spring frost at Ninety Nine Is falls on 21 April and the median first autumn frost on 21 October, which leaves a median of 183 days between them.
Fitted over all years, the growing season changes by +4.4 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1989 to 2019) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 21 April | n/a | 16 April | n/a | -2.9 days per decade |
| First autumn frost | 21 October | n/a | 24 October | n/a | +1.5 days per decade |
| Growing days | 183 days | n/a | 191 days | n/a | +4.4 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, 1941 to 2025A day with at least 75.1 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 192.7 mm (7.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 75.1 mm (3.0 in) | |
| 5 years | 100.7 mm (4.0 in) | |
| 10 years | 119.8 mm (4.7 in) | |
| 25 years | 146.6 mm (5.8 in) | |
| 50 years | 168.7 mm (6.6 in) | |
| 100 years | 192.7 mm (7.6 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 1941 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: 181.9 mm (7.2 in) in 1985; 181.1 mm (7.1 in) in 1990; 167.6 mm (6.6 in) in 1998.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Ninety Nine Is, at 1994. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1994 ran 0.2 C (0.3 F) lower than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1994 | -0.2 | -0.3 | possible | 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-13).