Iserlohn-Westig Weather Records (GME00124210)
Record envelope, standing records and threshold days for Iserlohn-Westig (GME00124210), Germany, with 48 years of record.
Key Facts for Iserlohn-Westig
- Iserlohn-Westig (GME00124210) is a weather station in Germany at 51.38 latitude and 7.77 longitude, 230 m (755 ft) above sea level.
- The station reports from 1931 to 1978, 48 years of record.
- 1,464 records set at Iserlohn-Westig still stand.
- Records are tracked for tmax, tmin, prcp, snwd: an element needs 30 years of data to be eligible.
- Iserlohn-Westig set a daily record low maximum temperature of 11.4 C (52.5 F) on 27 June 1978.
About the Station
- Location: Germany, 51.38 latitude, 7.77 longitude.
- Elevation: 230 m (755 ft).
- Period of record: 1931 to 1978, 48 years.
- Eligible elements: tmax, tmin, prcp, 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 | 14.4 C (57.9 F) | -27.1 C (-16.8 F) | n/a | n/a |
| Feb | 18.0 C (64.4 F) | -22.1 C (-7.8 F) | n/a | n/a |
| Mar | 24.2 C (75.6 F) | -16.1 C (3.0 F) | n/a | n/a |
| Apr | 29.6 C (85.3 F) | -6.1 C (21.0 F) | n/a | n/a |
| May | 32.5 C (90.5 F) | -4.6 C (23.7 F) | n/a | n/a |
| Jun | 35.5 C (95.9 F) | -0.5 C (31.1 F) | n/a | n/a |
| Jul | 34.5 C (94.1 F) | 3.2 C (37.8 F) | n/a | n/a |
| Aug | 35.0 C (95.0 F) | 3.0 C (37.4 F) | n/a | n/a |
| Sep | 32.5 C (90.5 F) | -2.4 C (27.7 F) | n/a | n/a |
| Oct | 25.0 C (77.0 F) | -5.6 C (21.9 F) | n/a | n/a |
| Nov | 20.7 C (69.3 F) | -11.0 C (12.2 F) | n/a | n/a |
| Dec | 17.0 C (62.6 F) | -19.5 C (-3.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1938 | 52 |
| 1939 | 46 |
| 1940 | 54 |
| 1941 | 53 |
| 1942 | 50 |
| 1943 | 38 |
| 1944 | 23 |
| 1947 | 70 |
| 1948 | 42 |
| 1949 | 47 |
| 1950 | 30 |
| 1951 | 18 |
| 1952 | 34 |
| 1953 | 52 |
| 1954 | 27 |
| 1955 | 32 |
| 1956 | 55 |
| 1957 | 46 |
| 1958 | 42 |
| 1959 | 38 |
| 1960 | 26 |
| 1961 | 53 |
| 1962 | 42 |
| 1963 | 33 |
| 1964 | 40 |
| 1965 | 32 |
| 1966 | 40 |
| 1967 | 25 |
| 1968 | 35 |
| 1969 | 37 |
| 1970 | 15 |
| 1971 | 43 |
| 1972 | 34 |
| 1973 | 21 |
| 1974 | 33 |
| 1975 | 27 |
| 1976 | 29 |
| 1977 | 35 |
| 1978 | 15 |
Wettest Day of Each Month
Jun: 96.4 mm (3.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 31.9 mm (1.3 in) | 20 January 1954 |
| Feb | 27.3 mm (1.1 in) | 25 February 1958 |
| Mar | 27.6 mm (1.1 in) | 24 March 1970 |
| Apr | 50.6 mm (2.0 in) | 17 April 1936 |
| May | 48.2 mm (1.9 in) | 29 May 1941 |
| Jun | 96.4 mm (3.8 in) | 2 June 1961 |
| Jul | 43.7 mm (1.7 in) | 8 July 1952 |
| Aug | 69.6 mm (2.7 in) | 30 August 1968 |
| Sep | 41.9 mm (1.6 in) | 10 September 1972 |
| Oct | 50.8 mm (2.0 in) | 27 October 1935 |
| Nov | 77.3 mm (3.0 in) | 3 November 1940 |
| Dec | 44.2 mm (1.7 in) | 30 December 1940 |
Period of Record Coverage
1938 to 1978| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 365 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 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 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 181 | 50% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 27 June 1978 | Iserlohn-Westig, DE | daily low max | 11.4 C (52.5 F) | 0.2 C (0.4 F) | 27 years | 12 of 100 (Routine) |
| 26 June 1978 | Iserlohn-Westig, DE | daily low max | 11.5 C (52.7 F) | 2.5 C (4.5 F) | 8 years | 11 of 100 (Routine) |
| 20 June 1978 | Iserlohn-Westig, DE | daily rain | 39.9 mm (1.6 in) | 19.9 mm (0.8 in) | 43 years | 40 of 100 (Notable) |
| 12 June 1978 | Iserlohn-Westig, DE | daily low max | 13.2 C (55.8 F) | 0.3 C (0.5 F) | 36 years | 15 of 100 (Routine) |
| 7 June 1978 | Iserlohn-Westig, DE | daily high min | 16.0 C (60.8 F) | 0.7 C (1.3 F) | 28 years | 14 of 100 (Routine) |
| 24 May 1978 | Iserlohn-Westig, DE | daily rain | 14.0 mm (0.6 in) | 2.6 mm (0.10 in) | 28 years | 16 of 100 (Routine) |
| 24 May 1978 | Iserlohn-Westig, DE | daily low max | 10.2 C (50.4 F) | 1.4 C (2.5 F) | 3 years | 6 of 100 (Routine) |
| 23 May 1978 | Iserlohn-Westig, DE | daily rain | 40.2 mm (1.6 in) | 20.7 mm (0.8 in) | 4 years | 40 of 100 (Notable) |
| 12 May 1978 | Iserlohn-Westig, DE | daily low max | 8.0 C (46.4 F) | 1.6 C (2.9 F) | 16 years | 11 of 100 (Routine) |
| 11 May 1978 | Iserlohn-Westig, DE | daily low max | 9.5 C (49.1 F) | 0.5 C (0.9 F) | 36 years | 16 of 100 (Routine) |
| 17 April 1978 | Iserlohn-Westig, DE | daily low min | -2.5 C (27.5 F) | 0.5 C (0.9 F) | 4 years | 6 of 100 (Routine) |
| 14 April 1978 | Iserlohn-Westig, DE | daily low max | 3.3 C (37.9 F) | 0.2 C (0.4 F) | 12 years | 7 of 100 (Routine) |
| 12 April 1978 | Iserlohn-Westig, DE | daily snow depth | 4.0 cm (1.6 in) | 4.0 cm (1.6 in) | 40 years | 20 of 100 (Routine) |
| 6 April 1978 | Iserlohn-Westig, DE | daily low min | -2.3 C (27.9 F) | 0.4 C (0.7 F) | 21 years | 11 of 100 (Routine) |
| 29 March 1978 | Iserlohn-Westig, DE | daily high min | 9.2 C (48.6 F) | 1.2 C (2.2 F) | 24 years | 13 of 100 (Routine) |
| 15 March 1978 | Iserlohn-Westig, DE | daily rain | 18.6 mm (0.7 in) | 8.1 mm (0.32 in) | 9 years | 20 of 100 (Routine) |
| 12 March 1978 | Iserlohn-Westig, DE | daily high min | 7.5 C (45.5 F) | 0.3 C (0.5 F) | 37 years | 15 of 100 (Routine) |
| 26 February 1978 | Iserlohn-Westig, DE | daily high min | 8.1 C (46.6 F) | 0.1 C (0.2 F) | 12 years | 7 of 100 (Routine) |
| 25 February 1978 | Iserlohn-Westig, DE | daily high min | 8.6 C (47.5 F) | 0.6 C (1.1 F) | 16 years | 10 of 100 (Routine) |
| 24 February 1978 | Iserlohn-Westig, DE | daily high min | 7.4 C (45.3 F) | 1.4 C (2.5 F) | 16 years | 11 of 100 (Routine) |
Climate Trend
38 complete years, 1938 to 1977| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1938 | 9.1 C | +0.25 C |
| 1939 | 8.5 C | -0.28 C |
| 1940 | 6.9 C | -1.90 C |
| 1941 | 7.7 C | -1.13 C |
| 1942 | 7.8 C | -0.98 C |
| 1943 | 9.4 C | +0.60 C |
| 1944 | 8.6 C | -0.21 C |
| 1947 | 9.3 C | +0.48 C |
| 1948 | 9.7 C | +0.89 C |
| 1949 | 9.7 C | +0.88 C |
| 1950 | 9.2 C | +0.38 C |
| 1951 | 9.5 C | +0.65 C |
| 1952 | 8.2 C | -0.60 C |
| 1953 | 9.5 C | +0.66 C |
| 1954 | 8.4 C | -0.43 C |
| 1955 | 8.2 C | -0.64 C |
| 1956 | 7.5 C | -1.32 C |
| 1957 | 9.3 C | +0.46 C |
| 1958 | 8.8 C | +0.01 C |
| 1959 | 9.9 C | +1.06 C |
| 1960 | 9.1 C | +0.32 C |
| 1961 | 9.6 C | +0.82 C |
| 1962 | 7.5 C | -1.31 C |
| 1963 | 7.7 C | -1.14 C |
| 1964 | 8.8 C | +0.02 C |
| 1965 | 8.1 C | -0.70 C |
| 1966 | 9.2 C | +0.41 C |
| 1967 | 9.5 C | +0.68 C |
| 1968 | 8.8 C | -0.06 C |
| 1969 | 8.8 C | -0.05 C |
| 1970 | 8.6 C | -0.23 C |
| 1971 | 9.1 C | +0.31 C |
| 1972 | 8.6 C | -0.20 C |
| 1973 | 9.1 C | +0.24 C |
| 1974 | 9.2 C | +0.42 C |
| 1975 | 9.5 C | +0.68 C |
| 1976 | 9.2 C | +0.43 C |
| 1977 | 9.3 C | +0.50 C |
The fitted trend in annual mean temperature here over 1938 to 1977 is 0.1 C (-0.1 to 0.4) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.3 F (-0.1 to 0.6) per decade. The slope is a straight line fitted to 38 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.1 C (-0.1 to 0.4) per decade | 0.3 F (-0.1 to 0.6) per decade | 1938 to 1977 | 38 | Not clearly different from zero |
| Mean daily maximum | 0.1 C (-0.1 to 0.3) per decade | 0.1 F (-0.2 to 0.5) per decade | 1938 to 1977 | 38 | Not clearly different from zero |
| Mean daily minimum | 0.22 C (-0.01 to 0.45) per decade | 0.40 F (-0.01 to 0.80) per decade | 1938 to 1977 | 38 | 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 1978| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 35.5 C (95.9 F) | 1947 | 31.4 C (88.5 F) | 39 |
| Coldest night (TNn) | -27.1 C (-16.8 F) | 1942 | -14.0 C (6.8 F) | 39 |
| Wettest day (Rx1day) | 96.4 mm (3.8 in) | 1961 | 34.0 mm (1.3 in) | 46 |
| Wettest five days (Rx5day) | 129.9 mm (5.1 in) | 1940 | 64.9 mm (2.6 in) | 46 |
| Longest dry spell (CDD) | 36 days | 1951 | 18 days | 46 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1931 | n/a |
| 1932 | n/a |
| 1933 | n/a |
| 1934 | n/a |
| 1935 | n/a |
| 1936 | n/a |
| 1937 | n/a |
| 1938 | 32.6 C (90.7 F) |
| 1939 | 31.6 C (88.9 F) |
| 1940 | 28.0 C (82.4 F) |
| 1941 | 33.0 C (91.4 F) |
| 1942 | 31.4 C (88.5 F) |
| 1943 | 32.5 C (90.5 F) |
| 1944 | 35.0 C (95.0 F) |
| 1947 | 35.5 C (95.9 F) |
| 1948 | 31.6 C (88.9 F) |
| 1949 | 31.0 C (87.8 F) |
| 1950 | 30.4 C (86.7 F) |
| 1951 | 29.4 C (84.9 F) |
| 1952 | 33.5 C (92.3 F) |
| 1953 | 31.2 C (88.2 F) |
| 1954 | 29.0 C (84.2 F) |
| 1955 | 29.4 C (84.9 F) |
| 1956 | 29.0 C (84.2 F) |
| 1957 | 34.3 C (93.7 F) |
| 1958 | 29.0 C (84.2 F) |
| 1959 | 34.5 C (94.1 F) |
| 1960 | 29.5 C (85.1 F) |
| 1961 | 31.9 C (89.4 F) |
| 1962 | 28.5 C (83.3 F) |
| 1963 | 32.5 C (90.5 F) |
| 1964 | 33.6 C (92.5 F) |
| 1965 | 27.5 C (81.5 F) |
| 1966 | 32.0 C (89.6 F) |
| 1967 | 30.5 C (86.9 F) |
| 1968 | 31.0 C (87.8 F) |
| 1969 | 32.5 C (90.5 F) |
| 1970 | 30.2 C (86.4 F) |
| 1971 | 31.0 C (87.8 F) |
| 1972 | 31.2 C (88.2 F) |
| 1973 | 31.6 C (88.9 F) |
| 1974 | 32.0 C (89.6 F) |
| 1975 | 31.5 C (88.7 F) |
| 1976 | 33.8 C (92.8 F) |
| 1977 | 30.8 C (87.4 F) |
| 1978 | 28.3 C (82.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1931 | n/a |
| 1932 | n/a |
| 1933 | n/a |
| 1934 | n/a |
| 1935 | n/a |
| 1936 | n/a |
| 1937 | n/a |
| 1938 | -19.5 C (-3.1 F) |
| 1939 | -11.1 C (12.0 F) |
| 1940 | -24.6 C (-12.3 F) |
| 1941 | -18.1 C (-0.6 F) |
| 1942 | -27.1 C (-16.8 F) |
| 1943 | -13.5 C (7.7 F) |
| 1944 | -14.5 C (5.9 F) |
| 1947 | -14.7 C (5.5 F) |
| 1948 | -12.2 C (10.0 F) |
| 1949 | -11.5 C (11.3 F) |
| 1950 | -16.0 C (3.2 F) |
| 1951 | -5.9 C (21.4 F) |
| 1952 | -12.2 C (10.0 F) |
| 1953 | -18.2 C (-0.8 F) |
| 1954 | -17.1 C (1.2 F) |
| 1955 | -16.1 C (3.0 F) |
| 1956 | -20.8 C (-5.4 F) |
| 1957 | -12.0 C (10.4 F) |
| 1958 | -14.0 C (6.8 F) |
| 1959 | -10.0 C (14.0 F) |
| 1960 | -19.2 C (-2.6 F) |
| 1961 | -14.0 C (6.8 F) |
| 1962 | -15.8 C (3.6 F) |
| 1963 | -20.8 C (-5.4 F) |
| 1964 | -14.0 C (6.8 F) |
| 1965 | -11.5 C (11.3 F) |
| 1966 | -16.0 C (3.2 F) |
| 1967 | -10.2 C (13.6 F) |
| 1968 | -18.2 C (-0.8 F) |
| 1969 | -12.4 C (9.7 F) |
| 1970 | -12.9 C (8.8 F) |
| 1971 | -16.3 C (2.7 F) |
| 1972 | -13.7 C (7.3 F) |
| 1973 | -12.4 C (9.7 F) |
| 1974 | -6.7 C (19.9 F) |
| 1975 | -8.7 C (16.3 F) |
| 1976 | -13.4 C (7.9 F) |
| 1977 | -8.8 C (16.2 F) |
| 1978 | -13.6 C (7.5 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1931 | 33.4 mm (1.3 in) |
| 1932 | 28.2 mm (1.1 in) |
| 1933 | 48.0 mm (1.9 in) |
| 1934 | 28.5 mm (1.1 in) |
| 1935 | 50.8 mm (2.0 in) |
| 1936 | 50.6 mm (2.0 in) |
| 1937 | 26.7 mm (1.1 in) |
| 1938 | 31.7 mm (1.2 in) |
| 1939 | 31.0 mm (1.2 in) |
| 1940 | 77.3 mm (3.0 in) |
| 1941 | 48.2 mm (1.9 in) |
| 1942 | 34.9 mm (1.4 in) |
| 1943 | 36.0 mm (1.4 in) |
| 1944 | 45.0 mm (1.8 in) |
| 1947 | 25.8 mm (1.0 in) |
| 1948 | 33.4 mm (1.3 in) |
| 1949 | 38.4 mm (1.5 in) |
| 1950 | 26.2 mm (1.0 in) |
| 1951 | 29.5 mm (1.2 in) |
| 1952 | 43.7 mm (1.7 in) |
| 1953 | 29.8 mm (1.2 in) |
| 1954 | 36.2 mm (1.4 in) |
| 1955 | 25.5 mm (1.0 in) |
| 1956 | 35.7 mm (1.4 in) |
| 1957 | 27.5 mm (1.1 in) |
| 1958 | 27.3 mm (1.1 in) |
| 1959 | 37.8 mm (1.5 in) |
| 1960 | 48.1 mm (1.9 in) |
| 1961 | 96.4 mm (3.8 in) |
| 1962 | 25.5 mm (1.0 in) |
| 1963 | 20.5 mm (0.8 in) |
| 1964 | 25.5 mm (1.0 in) |
| 1965 | 34.5 mm (1.4 in) |
| 1966 | 43.7 mm (1.7 in) |
| 1967 | 30.3 mm (1.2 in) |
| 1968 | 69.6 mm (2.7 in) |
| 1969 | 30.5 mm (1.2 in) |
| 1970 | 27.6 mm (1.1 in) |
| 1971 | 44.1 mm (1.7 in) |
| 1972 | 41.9 mm (1.6 in) |
| 1973 | 25.6 mm (1.0 in) |
| 1974 | 41.1 mm (1.6 in) |
| 1975 | 58.4 mm (2.3 in) |
| 1976 | 29.7 mm (1.2 in) |
| 1977 | 22.5 mm (0.9 in) |
| 1978 | 40.2 mm (1.6 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1931 | 49.1 mm (1.9 in) |
| 1932 | 58.8 mm (2.3 in) |
| 1933 | 64.4 mm (2.5 in) |
| 1934 | 52.4 mm (2.1 in) |
| 1935 | 74.6 mm (2.9 in) |
| 1936 | 77.6 mm (3.1 in) |
| 1937 | 54.0 mm (2.1 in) |
| 1938 | 57.8 mm (2.3 in) |
| 1939 | 96.2 mm (3.8 in) |
| 1940 | 129.9 mm (5.1 in) |
| 1941 | 99.5 mm (3.9 in) |
| 1942 | 71.5 mm (2.8 in) |
| 1943 | 53.5 mm (2.1 in) |
| 1944 | 70.1 mm (2.8 in) |
| 1947 | 61.5 mm (2.4 in) |
| 1948 | 80.8 mm (3.2 in) |
| 1949 | 66.9 mm (2.6 in) |
| 1950 | 45.6 mm (1.8 in) |
| 1951 | 60.9 mm (2.4 in) |
| 1952 | 64.8 mm (2.6 in) |
| 1953 | 49.4 mm (1.9 in) |
| 1954 | 72.5 mm (2.9 in) |
| 1955 | 56.6 mm (2.2 in) |
| 1956 | 67.2 mm (2.6 in) |
| 1957 | 79.5 mm (3.1 in) |
| 1958 | 56.8 mm (2.2 in) |
| 1959 | 43.2 mm (1.7 in) |
| 1960 | 65.5 mm (2.6 in) |
| 1961 | 122.6 mm (4.8 in) |
| 1962 | 59.3 mm (2.3 in) |
| 1963 | 44.3 mm (1.7 in) |
| 1964 | 46.7 mm (1.8 in) |
| 1965 | 84.0 mm (3.3 in) |
| 1966 | 87.1 mm (3.4 in) |
| 1967 | 52.9 mm (2.1 in) |
| 1968 | 127.2 mm (5.0 in) |
| 1969 | 64.9 mm (2.6 in) |
| 1970 | 64.9 mm (2.6 in) |
| 1971 | 70.2 mm (2.8 in) |
| 1972 | 84.2 mm (3.3 in) |
| 1973 | 61.6 mm (2.4 in) |
| 1974 | 71.2 mm (2.8 in) |
| 1975 | 84.4 mm (3.3 in) |
| 1976 | 58.3 mm (2.3 in) |
| 1977 | 50.3 mm (2.0 in) |
| 1978 | 58.4 mm (2.3 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1931 | 14 days |
| 1932 | 24 days |
| 1933 | 20 days |
| 1934 | 22 days |
| 1935 | 14 days |
| 1936 | 11 days |
| 1937 | 24 days |
| 1938 | 14 days |
| 1939 | 15 days |
| 1940 | 14 days |
| 1941 | 14 days |
| 1942 | 13 days |
| 1943 | 17 days |
| 1944 | 10 days |
| 1947 | 19 days |
| 1948 | 21 days |
| 1949 | 20 days |
| 1950 | 13 days |
| 1951 | 36 days |
| 1952 | 13 days |
| 1953 | 25 days |
| 1954 | 18 days |
| 1955 | 15 days |
| 1956 | 27 days |
| 1957 | 14 days |
| 1958 | 15 days |
| 1959 | 28 days |
| 1960 | 15 days |
| 1961 | 23 days |
| 1962 | 21 days |
| 1963 | 18 days |
| 1964 | 20 days |
| 1965 | 12 days |
| 1966 | 15 days |
| 1967 | 12 days |
| 1968 | 22 days |
| 1969 | 20 days |
| 1970 | 12 days |
| 1971 | 20 days |
| 1972 | 21 days |
| 1973 | 22 days |
| 1974 | 24 days |
| 1975 | 16 days |
| 1976 | 25 days |
| 1977 | 13 days |
| 1978 | 10 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
38 years with a frostAcross 38 years with a frost, the median last spring frost at Iserlohn-Westig falls on 28 April and the median first autumn frost on 20 October, which leaves a median of 176 days between them.
Fitted over all years, the growing season changes by +5.5 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1948 to 1977) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 28 April | n/a | 26 April | n/a | -2.7 days per decade |
| First autumn frost | 20 October | n/a | 20 October | n/a | +2.8 days per decade |
| Growing days | 176 days | n/a | 179 days | n/a | +5.5 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
45 years, 1931 to 1977A day with at least 33.6 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 100.8 mm (4.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 33.6 mm (1.3 in) | |
| 5 years | 45.0 mm (1.8 in) | |
| 10 years | 54.7 mm (2.2 in) | |
| 25 years | 70.0 mm (2.8 in) | |
| 50 years | 84.0 mm (3.3 in) | Longer than the 45 years of record |
| 100 years | 100.8 mm (4.0 in) | Longer than the 45 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, 45 years of values from 1931 to 1977.
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: 96.4 mm (3.8 in) in 1961; 77.3 mm (3.0 in) in 1940; 69.6 mm (2.7 in) in 1968.
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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 (2025-12-31).