Flat Top Weather Records (USC00463072)
Record envelope, standing records and threshold days for Flat Top (USC00463072), West Virginia, United States, with 69 years of record.
Key Facts for Flat Top
- Flat Top (USC00463072) is a weather station in West Virginia, United States at 37.59 latitude and -81.09 longitude, 1,017 m (3,335 ft) above sea level.
- The station reports from 1931 to 1999, 69 years of record.
- 1,464 records set at Flat Top still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Flat Top set a daily record precipitation of 49.5 mm (1.9 in) on 29 July 1999.
About the Station
- Location: West Virginia, United States, 37.59 latitude, -81.09 longitude.
- Elevation: 1,017 m (3,335 ft).
- Period of record: 1931 to 1999, 69 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 | 21.1 C (70.0 F) | -33.3 C (-27.9 F) | n/a | n/a |
| Feb | 20.6 C (69.1 F) | -25.0 C (-13.0 F) | n/a | n/a |
| Mar | 26.1 C (79.0 F) | -20.6 C (-5.1 F) | n/a | n/a |
| Apr | 27.2 C (81.0 F) | -12.2 C (10.0 F) | n/a | n/a |
| May | 30.6 C (87.1 F) | -6.1 C (21.0 F) | n/a | n/a |
| Jun | 32.2 C (90.0 F) | -1.7 C (28.9 F) | n/a | n/a |
| Jul | 33.3 C (91.9 F) | 3.3 C (37.9 F) | n/a | n/a |
| Aug | 32.2 C (90.0 F) | 1.7 C (35.1 F) | n/a | n/a |
| Sep | 32.2 C (90.0 F) | -3.3 C (26.1 F) | n/a | n/a |
| Oct | 28.9 C (84.0 F) | -9.4 C (15.1 F) | n/a | n/a |
| Nov | 25.6 C (78.1 F) | -20.0 C (-4.0 F) | n/a | n/a |
| Dec | 22.2 C (72.0 F) | -29.4 C (-20.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1931 | 25 |
| 1932 | 27 |
| 1933 | 30 |
| 1934 | 26 |
| 1935 | 22 |
| 1936 | 36 |
| 1937 | 16 |
| 1938 | 16 |
| 1939 | 28 |
| 1940 | 34 |
| 1941 | 35 |
| 1942 | 21 |
| 1943 | 39 |
| 1944 | 25 |
| 1945 | 33 |
| 1946 | 19 |
| 1947 | 28 |
| 1948 | 23 |
| 1949 | 14 |
| 1950 | 20 |
| 1951 | 17 |
| 1952 | 21 |
| 1953 | 19 |
| 1954 | 34 |
| 1955 | 21 |
| 1956 | 28 |
| 1957 | 11 |
| 1958 | 14 |
| 1959 | 15 |
| 1960 | 13 |
| 1961 | 25 |
| 1962 | 24 |
| 1963 | 16 |
| 1964 | 28 |
| 1965 | 18 |
| 1966 | 16 |
| 1967 | 21 |
| 1968 | 11 |
| 1969 | 8 |
| 1970 | 14 |
| 1971 | 14 |
| 1972 | 19 |
| 1973 | 11 |
| 1974 | 21 |
| 1975 | 9 |
| 1976 | 29 |
| 1977 | 37 |
| 1978 | 11 |
| 1979 | 20 |
| 1980 | 13 |
| 1981 | 13 |
| 1982 | 23 |
| 1983 | 22 |
| 1984 | 21 |
| 1985 | 23 |
| 1986 | 18 |
| 1987 | 18 |
| 1988 | 30 |
| 1989 | 30 |
| 1990 | 16 |
| 1991 | 34 |
| 1992 | 11 |
| 1993 | 18 |
| 1994 | 16 |
| 1995 | 15 |
| 1996 | 20 |
| 1997 | 12 |
| 1998 | 35 |
| 1999 | 14 |
All-Time Record Progression
10 new records| Date | Kind | Detail |
|---|---|---|
| 1962-01-11 | Record low minimum temperature | Record low minimum temperature -27.8 C (-18.0 F) |
| 1963-01-24 | Record low minimum temperature | Record low minimum temperature -29.4 C (-20.9 F) |
| 1970-01-09 | Record low maximum temperature | Record low maximum temperature -20.0 C (-4.0 F) |
| 1982-01-11 | Record low maximum temperature | Record low maximum temperature -23.9 C (-11.0 F) |
| 1982-01-17 | Record low minimum temperature | Record low minimum temperature -30.0 C (-22.0 F) |
| 1985-01-21 | Record low minimum temperature | Record low minimum temperature -33.3 C (-27.9 F) |
| 1987-07-24 | Record high maximum temperature | Record high maximum temperature 32.8 C (91.0 F) |
| 1987-12-29 | Record daily snowfall | Record daily snowfall 57.2 cm (22.5 in) |
| 1988-07-09 | Record high maximum temperature | Record high maximum temperature 33.3 C (91.9 F) |
| 1998-01-28 | Record daily snowfall | Record daily snowfall 76.2 cm (30.0 in) |
Wettest Day of Each Month
Oct: 86.1 mm (3.4 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 61.0 mm (2.4 in) | 29 January 1957 |
| Feb | 62.7 mm (2.5 in) | 25 February 1934 |
| Mar | 56.4 mm (2.2 in) | 11 March 1963 |
| Apr | 73.7 mm (2.9 in) | 5 April 1977 |
| May | 78.7 mm (3.1 in) | 16 May 1996 |
| Jun | 75.7 mm (3.0 in) | 5 June 1992 |
| Jul | 70.4 mm (2.8 in) | 21 July 1946 |
| Aug | 82.3 mm (3.2 in) | 20 August 1969 |
| Sep | 77.2 mm (3.0 in) | 14 September 1966 |
| Oct | 86.1 mm (3.4 in) | 15 October 1954 |
| Nov | 53.8 mm (2.1 in) | 29 November 1963 |
| Dec | 55.1 mm (2.2 in) | 15 December 1948 |
Period of Record Coverage
1931 to 1999| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1931 | 363 | 99% | Yes |
| 1932 | 365 | 100% | Yes |
| 1933 | 362 | 99% | Yes |
| 1934 | 362 | 99% | Yes |
| 1935 | 364 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 271 | 74% | No |
| 1938 | 362 | 99% | Yes |
| 1939 | 359 | 98% | Yes |
| 1940 | 352 | 96% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 364 | 100% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 364 | 100% | Yes |
| 1948 | 365 | 100% | Yes |
| 1949 | 361 | 99% | Yes |
| 1950 | 360 | 99% | Yes |
| 1951 | 361 | 99% | Yes |
| 1952 | 364 | 99% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 364 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 364 | 99% | Yes |
| 1957 | 361 | 99% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 363 | 99% | Yes |
| 1960 | 364 | 99% | Yes |
| 1961 | 364 | 100% | Yes |
| 1962 | 333 | 91% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 334 | 92% | Yes |
| 1966 | 334 | 92% | Yes |
| 1967 | 334 | 92% | Yes |
| 1968 | 262 | 72% | No |
| 1969 | 364 | 100% | Yes |
| 1970 | 365 | 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 | 363 | 99% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 364 | 100% | Yes |
| 1984 | 364 | 99% | Yes |
| 1985 | 363 | 99% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 360 | 99% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 363 | 99% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 362 | 99% | Yes |
| 1992 | 363 | 99% | Yes |
| 1993 | 361 | 99% | Yes |
| 1994 | 364 | 100% | Yes |
| 1995 | 362 | 99% | Yes |
| 1996 | 365 | 100% | Yes |
| 1997 | 364 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 210 | 58% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 29 July 1999 | Flat Top, US | daily rain | 49.5 mm (1.9 in) | 4.3 mm (0.17 in) | 62 years | 28 of 100 (Routine) |
| 24 July 1999 | Flat Top, US | daily high min (Tie) | 20.6 C (69.1 F) | tie | 64 years | 6 of 100 (Routine) |
| 23 July 1999 | Flat Top, US | daily high max | 30.6 C (87.1 F) | 0.6 C (1.1 F) | 65 years | 27 of 100 (Routine) |
| 13 July 1999 | Flat Top, US | monthly low max | 13.3 C (55.9 F) | 0.6 C (1.1 F) | 27 years | 26 of 100 (Routine) |
| 7 July 1999 | Flat Top, US | daily high max (Tie) | 30.6 C (87.1 F) | tie | 49 years | 5 of 100 (Routine) |
| 6 July 1999 | Flat Top, US | daily high min (Tie) | 20.6 C (69.1 F) | tie | 29 years | 3 of 100 (Routine) |
| 6 July 1999 | Flat Top, US | daily high max (Tie) | 30.6 C (87.1 F) | tie | 5 years | 1 of 100 (Routine) |
| 5 July 1999 | Flat Top, US | daily high min | 20.6 C (69.1 F) | 1.2 C (2.2 F) | 5 years | 11 of 100 (Routine) |
| 5 July 1999 | Flat Top, US | daily high max (Tie) | 30.0 C (86.0 F) | tie | 50 years | 5 of 100 (Routine) |
| 4 July 1999 | Flat Top, US | daily high min (Tie) | 20.0 C (68.0 F) | tie | 5 years | 1 of 100 (Routine) |
| 27 June 1999 | Flat Top, US | daily high max (Tie) | 29.4 C (84.9 F) | tie | 46 years | 5 of 100 (Routine) |
| 11 June 1999 | Flat Top, US | daily high max | 31.7 C (89.1 F) | 1.7 C (3.1 F) | 52 years | 25 of 100 (Routine) |
| 10 June 1999 | Flat Top, US | daily high max | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 52 years | 24 of 100 (Routine) |
| 10 June 1999 | Flat Top, US | daily high min | 18.9 C (66.0 F) | 0.6 C (1.1 F) | 17 years | 12 of 100 (Routine) |
| 9 June 1999 | Flat Top, US | daily high max | 28.9 C (84.0 F) | 0.6 C (1.1 F) | 45 years | 20 of 100 (Routine) |
| 7 June 1999 | Flat Top, US | daily high max | 28.9 C (84.0 F) | 1.1 C (2.0 F) | 65 years | 28 of 100 (Routine) |
| 30 May 1999 | Flat Top, US | daily high max (Tie) | 26.7 C (80.1 F) | tie | 12 years | 2 of 100 (Routine) |
| 12 May 1999 | Flat Top, US | daily high max (Tie) | 25.6 C (78.1 F) | tie | 45 years | 4 of 100 (Routine) |
| 23 April 1999 | Flat Top, US | daily high min (Tie) | 15.6 C (60.1 F) | tie | 13 years | 2 of 100 (Routine) |
| 9 April 1999 | Flat Top, US | daily high min | 14.4 C (57.9 F) | 1.1 C (2.0 F) | 8 years | 9 of 100 (Routine) |
Climate Trend
60 complete years, 1931 to 1998| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1931 | 10.2 C | +0.82 C |
| 1932 | 10.1 C | +0.76 C |
| 1933 | 10.2 C | +0.82 C |
| 1934 | 9.3 C | -0.04 C |
| 1935 | 9.0 C | -0.37 C |
| 1936 | 9.3 C | -0.04 C |
| 1938 | 10.5 C | +1.16 C |
| 1939 | 10.8 C | +1.48 C |
| 1941 | 9.6 C | +0.28 C |
| 1942 | 9.2 C | -0.15 C |
| 1943 | 9.1 C | -0.26 C |
| 1944 | 9.1 C | -0.26 C |
| 1945 | 9.3 C | -0.05 C |
| 1946 | 10.6 C | +1.21 C |
| 1947 | 9.0 C | -0.33 C |
| 1948 | 9.4 C | +0.07 C |
| 1949 | 10.5 C | +1.15 C |
| 1950 | 9.0 C | -0.39 C |
| 1951 | 9.0 C | -0.37 C |
| 1952 | 9.6 C | +0.26 C |
| 1953 | 9.9 C | +0.56 C |
| 1954 | 9.1 C | -0.28 C |
| 1955 | 9.1 C | -0.28 C |
| 1956 | 9.0 C | -0.30 C |
| 1957 | 9.3 C | -0.06 C |
| 1958 | 7.8 C | -1.59 C |
| 1959 | 9.5 C | +0.11 C |
| 1960 | 8.3 C | -1.01 C |
| 1961 | 8.9 C | -0.49 C |
| 1963 | 8.0 C | -1.39 C |
| 1964 | 8.7 C | -0.60 C |
| 1969 | 8.4 C | -0.90 C |
| 1970 | 9.3 C | -0.03 C |
| 1971 | 9.2 C | -0.19 C |
| 1972 | 8.5 C | -0.82 C |
| 1973 | 9.6 C | +0.21 C |
| 1974 | 9.4 C | +0.06 C |
| 1975 | 9.7 C | +0.39 C |
| 1976 | 8.2 C | -1.11 C |
| 1977 | 8.6 C | -0.78 C |
| 1979 | 8.1 C | -1.20 C |
| 1980 | 8.6 C | -0.72 C |
| 1981 | 8.2 C | -1.11 C |
| 1982 | 9.3 C | +0.00 C |
| 1983 | 8.7 C | -0.69 C |
| 1984 | 9.0 C | -0.32 C |
| 1985 | 9.0 C | -0.35 C |
| 1986 | 9.7 C | +0.31 C |
| 1987 | 9.4 C | +0.06 C |
| 1988 | 9.1 C | -0.29 C |
| 1989 | 8.6 C | -0.73 C |
| 1990 | 10.0 C | +0.65 C |
| 1991 | 11.3 C | +1.91 C |
| 1992 | 9.6 C | +0.28 C |
| 1993 | 10.1 C | +0.72 C |
| 1994 | 10.4 C | +1.08 C |
| 1995 | 10.0 C | +0.61 C |
| 1996 | 9.4 C | +0.03 C |
| 1997 | 9.5 C | +0.11 C |
| 1998 | 11.6 C | +2.27 C |
The fitted trend in annual mean temperature here over 1931 to 1998 is -0.01 C (-0.11 to 0.09) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.02 F (-0.20 to 0.16) per decade. The slope is a straight line fitted to 60 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.01 C (-0.11 to 0.09) per decade | -0.02 F (-0.20 to 0.16) per decade | 1931 to 1998 | 60 | Not clearly different from zero |
| Mean daily maximum | -0.01 C (-0.12 to 0.10) per decade | -0.02 F (-0.22 to 0.18) per decade | 1931 to 1998 | 60 | Not clearly different from zero |
| Mean daily minimum | -0.01 C (-0.14 to 0.13) per decade | -0.01 F (-0.26 to 0.23) per decade | 1931 to 1998 | 60 | 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
1931 to 1999| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 33.3 C (91.9 F) | 1988 | 29.4 C (84.9 F) | 69 |
| Coldest night (TNn) | -33.3 C (-27.9 F) | 1985 | -21.7 C (-7.1 F) | 69 |
| Wettest day (Rx1day) | 86.1 mm (3.4 in) | 1954 | 50.8 mm (2.0 in) | 69 |
| Wettest five days (Rx5day) | 137.9 mm (5.4 in) | 1977 | 86.1 mm (3.4 in) | 69 |
| Longest dry spell (CDD) | 30 days | 1998 | 15 days | 69 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1931 | 28.9 C (84.0 F) |
| 1932 | 30.0 C (86.0 F) |
| 1933 | 30.0 C (86.0 F) |
| 1934 | 30.6 C (87.1 F) |
| 1935 | 27.2 C (81.0 F) |
| 1936 | 30.0 C (86.0 F) |
| 1937 | 27.8 C (82.0 F) |
| 1938 | 27.8 C (82.0 F) |
| 1939 | 29.4 C (84.9 F) |
| 1940 | 27.8 C (82.0 F) |
| 1941 | 31.1 C (88.0 F) |
| 1942 | 30.6 C (87.1 F) |
| 1943 | 30.0 C (86.0 F) |
| 1944 | 31.1 C (88.0 F) |
| 1945 | 30.0 C (86.0 F) |
| 1946 | 30.0 C (86.0 F) |
| 1947 | 30.0 C (86.0 F) |
| 1948 | 31.7 C (89.1 F) |
| 1949 | 30.6 C (87.1 F) |
| 1950 | 27.8 C (82.0 F) |
| 1951 | 29.4 C (84.9 F) |
| 1952 | 31.1 C (88.0 F) |
| 1953 | 32.2 C (90.0 F) |
| 1954 | 32.2 C (90.0 F) |
| 1955 | 31.1 C (88.0 F) |
| 1956 | 28.9 C (84.0 F) |
| 1957 | 30.6 C (87.1 F) |
| 1958 | 27.8 C (82.0 F) |
| 1959 | 30.0 C (86.0 F) |
| 1960 | 27.8 C (82.0 F) |
| 1961 | 27.8 C (82.0 F) |
| 1962 | 28.3 C (82.9 F) |
| 1963 | 27.8 C (82.0 F) |
| 1964 | 29.4 C (84.9 F) |
| 1965 | 29.4 C (84.9 F) |
| 1966 | 29.4 C (84.9 F) |
| 1967 | 26.1 C (79.0 F) |
| 1968 | 29.4 C (84.9 F) |
| 1969 | 29.4 C (84.9 F) |
| 1970 | 28.9 C (84.0 F) |
| 1971 | 28.3 C (82.9 F) |
| 1972 | 29.4 C (84.9 F) |
| 1973 | 28.3 C (82.9 F) |
| 1974 | 27.8 C (82.0 F) |
| 1975 | 28.9 C (84.0 F) |
| 1976 | 27.8 C (82.0 F) |
| 1977 | 30.0 C (86.0 F) |
| 1978 | 28.9 C (84.0 F) |
| 1979 | 27.8 C (82.0 F) |
| 1980 | 30.0 C (86.0 F) |
| 1981 | 27.8 C (82.0 F) |
| 1982 | 27.8 C (82.0 F) |
| 1983 | 30.6 C (87.1 F) |
| 1984 | 29.4 C (84.9 F) |
| 1985 | 28.3 C (82.9 F) |
| 1986 | 30.0 C (86.0 F) |
| 1987 | 32.8 C (91.0 F) |
| 1988 | 33.3 C (91.9 F) |
| 1989 | 28.3 C (82.9 F) |
| 1990 | 28.9 C (84.0 F) |
| 1991 | 30.6 C (87.1 F) |
| 1992 | 27.8 C (82.0 F) |
| 1993 | 31.7 C (89.1 F) |
| 1994 | 30.0 C (86.0 F) |
| 1995 | 31.1 C (88.0 F) |
| 1996 | 32.2 C (90.0 F) |
| 1997 | 29.4 C (84.9 F) |
| 1998 | 32.2 C (90.0 F) |
| 1999 | 31.7 C (89.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1931 | -12.2 C (10.0 F) |
| 1932 | -17.8 C (0.0 F) |
| 1933 | -22.2 C (-8.0 F) |
| 1934 | -21.7 C (-7.1 F) |
| 1935 | -24.4 C (-11.9 F) |
| 1936 | -27.2 C (-17.0 F) |
| 1937 | -17.8 C (0.0 F) |
| 1938 | -18.9 C (-2.0 F) |
| 1939 | -16.7 C (1.9 F) |
| 1940 | -23.3 C (-9.9 F) |
| 1941 | -17.2 C (1.0 F) |
| 1942 | -23.3 C (-9.9 F) |
| 1943 | -21.7 C (-7.1 F) |
| 1944 | -19.4 C (-2.9 F) |
| 1945 | -20.0 C (-4.0 F) |
| 1946 | -18.9 C (-2.0 F) |
| 1947 | -21.1 C (-6.0 F) |
| 1948 | -22.8 C (-9.0 F) |
| 1949 | -14.4 C (6.1 F) |
| 1950 | -20.0 C (-4.0 F) |
| 1951 | -22.2 C (-8.0 F) |
| 1952 | -17.2 C (1.0 F) |
| 1953 | -18.9 C (-2.0 F) |
| 1954 | -18.9 C (-2.0 F) |
| 1955 | -22.8 C (-9.0 F) |
| 1956 | -13.9 C (7.0 F) |
| 1957 | -22.8 C (-9.0 F) |
| 1958 | -22.8 C (-9.0 F) |
| 1959 | -22.8 C (-9.0 F) |
| 1960 | -21.1 C (-6.0 F) |
| 1961 | -21.7 C (-7.1 F) |
| 1962 | -27.8 C (-18.0 F) |
| 1963 | -29.4 C (-20.9 F) |
| 1964 | -18.9 C (-2.0 F) |
| 1965 | -21.1 C (-6.0 F) |
| 1966 | -23.9 C (-11.0 F) |
| 1967 | -23.3 C (-9.9 F) |
| 1968 | -21.7 C (-7.1 F) |
| 1969 | -18.9 C (-2.0 F) |
| 1970 | -24.4 C (-11.9 F) |
| 1971 | -22.8 C (-9.0 F) |
| 1972 | -27.8 C (-18.0 F) |
| 1973 | -21.7 C (-7.1 F) |
| 1974 | -16.1 C (3.0 F) |
| 1975 | -18.3 C (-0.9 F) |
| 1976 | -20.6 C (-5.1 F) |
| 1977 | -29.4 C (-20.9 F) |
| 1978 | -23.3 C (-9.9 F) |
| 1979 | -22.8 C (-9.0 F) |
| 1980 | -21.7 C (-7.1 F) |
| 1981 | -23.3 C (-9.9 F) |
| 1982 | -30.0 C (-22.0 F) |
| 1983 | -28.9 C (-20.0 F) |
| 1984 | -25.0 C (-13.0 F) |
| 1985 | -33.3 C (-27.9 F) |
| 1986 | -23.3 C (-9.9 F) |
| 1987 | -19.4 C (-2.9 F) |
| 1988 | -20.6 C (-5.1 F) |
| 1989 | -29.4 C (-20.9 F) |
| 1990 | -17.2 C (1.0 F) |
| 1991 | -20.0 C (-4.0 F) |
| 1992 | -17.8 C (0.0 F) |
| 1993 | -17.8 C (0.0 F) |
| 1994 | -28.9 C (-20.0 F) |
| 1995 | -18.9 C (-2.0 F) |
| 1996 | -23.9 C (-11.0 F) |
| 1997 | -21.1 C (-6.0 F) |
| 1998 | -13.9 C (7.0 F) |
| 1999 | -16.7 C (1.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1931 | 35.6 mm (1.4 in) |
| 1932 | 52.3 mm (2.1 in) |
| 1933 | 35.8 mm (1.4 in) |
| 1934 | 62.7 mm (2.5 in) |
| 1935 | 41.4 mm (1.6 in) |
| 1936 | 46.5 mm (1.8 in) |
| 1937 | 54.1 mm (2.1 in) |
| 1938 | 67.3 mm (2.6 in) |
| 1939 | 55.9 mm (2.2 in) |
| 1940 | 76.7 mm (3.0 in) |
| 1941 | 30.0 mm (1.2 in) |
| 1942 | 50.3 mm (2.0 in) |
| 1943 | 52.1 mm (2.1 in) |
| 1944 | 63.0 mm (2.5 in) |
| 1945 | 52.1 mm (2.1 in) |
| 1946 | 70.4 mm (2.8 in) |
| 1947 | 48.3 mm (1.9 in) |
| 1948 | 55.1 mm (2.2 in) |
| 1949 | 78.5 mm (3.1 in) |
| 1950 | 57.4 mm (2.3 in) |
| 1951 | 31.2 mm (1.2 in) |
| 1952 | 49.0 mm (1.9 in) |
| 1953 | 37.6 mm (1.5 in) |
| 1954 | 86.1 mm (3.4 in) |
| 1955 | 46.7 mm (1.8 in) |
| 1956 | 44.2 mm (1.7 in) |
| 1957 | 61.0 mm (2.4 in) |
| 1958 | 38.4 mm (1.5 in) |
| 1959 | 50.0 mm (2.0 in) |
| 1960 | 25.1 mm (1.0 in) |
| 1961 | 52.6 mm (2.1 in) |
| 1962 | 47.5 mm (1.9 in) |
| 1963 | 56.4 mm (2.2 in) |
| 1964 | 57.9 mm (2.3 in) |
| 1965 | 49.0 mm (1.9 in) |
| 1966 | 77.2 mm (3.0 in) |
| 1967 | 35.1 mm (1.4 in) |
| 1968 | 42.4 mm (1.7 in) |
| 1969 | 82.3 mm (3.2 in) |
| 1970 | 40.6 mm (1.6 in) |
| 1971 | 41.9 mm (1.6 in) |
| 1972 | 50.8 mm (2.0 in) |
| 1973 | 34.8 mm (1.4 in) |
| 1974 | 68.3 mm (2.7 in) |
| 1975 | 54.1 mm (2.1 in) |
| 1976 | 60.2 mm (2.4 in) |
| 1977 | 73.7 mm (2.9 in) |
| 1978 | 40.4 mm (1.6 in) |
| 1979 | 49.3 mm (1.9 in) |
| 1980 | 48.0 mm (1.9 in) |
| 1981 | 51.3 mm (2.0 in) |
| 1982 | 50.8 mm (2.0 in) |
| 1983 | 43.7 mm (1.7 in) |
| 1984 | 53.3 mm (2.1 in) |
| 1985 | 44.5 mm (1.8 in) |
| 1986 | 48.5 mm (1.9 in) |
| 1987 | 50.8 mm (2.0 in) |
| 1988 | 57.7 mm (2.3 in) |
| 1989 | 45.5 mm (1.8 in) |
| 1990 | 44.2 mm (1.7 in) |
| 1991 | 56.4 mm (2.2 in) |
| 1992 | 75.7 mm (3.0 in) |
| 1993 | 50.8 mm (2.0 in) |
| 1994 | 50.0 mm (2.0 in) |
| 1995 | 52.8 mm (2.1 in) |
| 1996 | 78.7 mm (3.1 in) |
| 1997 | 37.3 mm (1.5 in) |
| 1998 | 52.1 mm (2.1 in) |
| 1999 | 49.5 mm (1.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1931 | 78.8 mm (3.1 in) |
| 1932 | 70.2 mm (2.8 in) |
| 1933 | 80.0 mm (3.1 in) |
| 1934 | 94.5 mm (3.7 in) |
| 1935 | 91.3 mm (3.6 in) |
| 1936 | 78.0 mm (3.1 in) |
| 1937 | 105.7 mm (4.2 in) |
| 1938 | 129.6 mm (5.1 in) |
| 1939 | 69.8 mm (2.7 in) |
| 1940 | 111.0 mm (4.4 in) |
| 1941 | 67.1 mm (2.6 in) |
| 1942 | 83.0 mm (3.3 in) |
| 1943 | 94.5 mm (3.7 in) |
| 1944 | 64.3 mm (2.5 in) |
| 1945 | 90.2 mm (3.6 in) |
| 1946 | 98.6 mm (3.9 in) |
| 1947 | 99.5 mm (3.9 in) |
| 1948 | 80.5 mm (3.2 in) |
| 1949 | 130.6 mm (5.1 in) |
| 1950 | 113.1 mm (4.5 in) |
| 1951 | 47.3 mm (1.9 in) |
| 1952 | 81.2 mm (3.2 in) |
| 1953 | 72.6 mm (2.9 in) |
| 1954 | 96.0 mm (3.8 in) |
| 1955 | 113.9 mm (4.5 in) |
| 1956 | 81.0 mm (3.2 in) |
| 1957 | 133.7 mm (5.3 in) |
| 1958 | 75.0 mm (3.0 in) |
| 1959 | 69.3 mm (2.7 in) |
| 1960 | 52.4 mm (2.1 in) |
| 1961 | 74.1 mm (2.9 in) |
| 1962 | 69.4 mm (2.7 in) |
| 1963 | 89.8 mm (3.5 in) |
| 1964 | 83.5 mm (3.3 in) |
| 1965 | 87.4 mm (3.4 in) |
| 1966 | 86.1 mm (3.4 in) |
| 1967 | 70.2 mm (2.8 in) |
| 1968 | 50.1 mm (2.0 in) |
| 1969 | 117.9 mm (4.6 in) |
| 1970 | 98.1 mm (3.9 in) |
| 1971 | 65.8 mm (2.6 in) |
| 1972 | 103.2 mm (4.1 in) |
| 1973 | 65.0 mm (2.6 in) |
| 1974 | 85.6 mm (3.4 in) |
| 1975 | 101.1 mm (4.0 in) |
| 1976 | 86.6 mm (3.4 in) |
| 1977 | 137.9 mm (5.4 in) |
| 1978 | 80.5 mm (3.2 in) |
| 1979 | 74.9 mm (2.9 in) |
| 1980 | 97.6 mm (3.8 in) |
| 1981 | 94.5 mm (3.7 in) |
| 1982 | 81.2 mm (3.2 in) |
| 1983 | 121.9 mm (4.8 in) |
| 1984 | 106.7 mm (4.2 in) |
| 1985 | 99.4 mm (3.9 in) |
| 1986 | 72.6 mm (2.9 in) |
| 1987 | 102.9 mm (4.1 in) |
| 1988 | 75.8 mm (3.0 in) |
| 1989 | 98.1 mm (3.9 in) |
| 1990 | 89.9 mm (3.5 in) |
| 1991 | 91.1 mm (3.6 in) |
| 1992 | 90.2 mm (3.6 in) |
| 1993 | 54.9 mm (2.2 in) |
| 1994 | 84.1 mm (3.3 in) |
| 1995 | 64.7 mm (2.5 in) |
| 1996 | 99.3 mm (3.9 in) |
| 1997 | 68.9 mm (2.7 in) |
| 1998 | 97.0 mm (3.8 in) |
| 1999 | 71.6 mm (2.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1931 | 23 days |
| 1932 | 14 days |
| 1933 | 10 days |
| 1934 | 15 days |
| 1935 | 20 days |
| 1936 | 15 days |
| 1937 | 9 days |
| 1938 | 20 days |
| 1939 | 17 days |
| 1940 | 13 days |
| 1941 | 18 days |
| 1942 | 22 days |
| 1943 | 20 days |
| 1944 | 13 days |
| 1945 | 13 days |
| 1946 | 11 days |
| 1947 | 16 days |
| 1948 | 16 days |
| 1949 | 12 days |
| 1950 | 12 days |
| 1951 | 16 days |
| 1952 | 24 days |
| 1953 | 27 days |
| 1954 | 15 days |
| 1955 | 19 days |
| 1956 | 13 days |
| 1957 | 14 days |
| 1958 | 14 days |
| 1959 | 26 days |
| 1960 | 13 days |
| 1961 | 10 days |
| 1962 | 11 days |
| 1963 | 28 days |
| 1964 | 18 days |
| 1965 | 15 days |
| 1966 | 21 days |
| 1967 | 12 days |
| 1968 | 20 days |
| 1969 | 12 days |
| 1970 | 12 days |
| 1971 | 13 days |
| 1972 | 10 days |
| 1973 | 14 days |
| 1974 | 23 days |
| 1975 | 9 days |
| 1976 | 19 days |
| 1977 | 13 days |
| 1978 | 17 days |
| 1979 | 12 days |
| 1980 | 14 days |
| 1981 | 16 days |
| 1982 | 12 days |
| 1983 | 16 days |
| 1984 | 12 days |
| 1985 | 27 days |
| 1986 | 15 days |
| 1987 | 18 days |
| 1988 | 15 days |
| 1989 | 11 days |
| 1990 | 14 days |
| 1991 | 24 days |
| 1992 | 12 days |
| 1993 | 17 days |
| 1994 | 13 days |
| 1995 | 20 days |
| 1996 | 9 days |
| 1997 | 13 days |
| 1998 | 30 days |
| 1999 | 11 days |
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Frost Dates and Growing Season
60 years with a frostAcross 60 years with a frost, the median last spring frost at Flat Top falls on 28 April and the median first autumn frost on 10 October, which leaves a median of 160 days between them.
In 1964 to 1998 the median growing season was 159 days. That is 4 days fewer than in 1931 to 1963.
Fitted over all years, the growing season changes by +1.5 days per decade at this station.
| Measure | Median, all years | Earliest period (1931 to 1963) | Recent period (1964 to 1998) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 28 April | 28 April | 30 April | 2 days later | -0.6 days per decade |
| First autumn frost | 10 October | 9 October | 12 October | 3 days later | +0.9 days per decade |
| Growing days | 160 days | 163 days | 159 days | 4 days fewer | +1.5 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
65 years, 1932 to 1998A day with at least 51.1 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 91.0 mm (3.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 51.1 mm (2.0 in) | |
| 5 years | 63.0 mm (2.5 in) | |
| 10 years | 70.3 mm (2.8 in) | |
| 25 years | 79.1 mm (3.1 in) | |
| 50 years | 85.2 mm (3.4 in) | |
| 100 years | 91.0 mm (3.6 in) | Longer than the 65 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, 65 years of values from 1932 to 1998.
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: 86.1 mm (3.4 in) in 1954; 82.3 mm (3.2 in) in 1969; 78.7 mm (3.1 in) in 1996.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).