Darmstadt-Botanischer Garten Weather Records (GME00132670)
Record envelope, standing records and threshold days for Darmstadt-Botanischer Garten (GME00132670), Germany, with 38 years of record.
Key Facts for Darmstadt-Botanischer Garten
- Darmstadt-Botanischer Garten (GME00132670) is a weather station in Germany at 49.87 latitude and 8.68 longitude, 169 m (554 ft) above sea level.
- The station reports from 1937 to 1974, 38 years of record.
- 1,464 records set at Darmstadt-Botanischer Garten still stand.
- Records are tracked for tmax, tmin, prcp, snwd: an element needs 30 years of data to be eligible.
- Darmstadt-Botanischer Garten tied a daily record low minimum temperature of 8.5 C (47.3 F) on 22 July 1974.
About the Station
- Location: Germany, 49.87 latitude, 8.68 longitude.
- Elevation: 169 m (554 ft).
- Period of record: 1937 to 1974, 38 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 | 14.1 C (57.4 F) | -26.9 C (-16.4 F) | n/a | n/a |
| Feb | 18.0 C (64.4 F) | -22.5 C (-8.5 F) | n/a | n/a |
| Mar | 24.0 C (75.2 F) | -13.5 C (7.7 F) | n/a | n/a |
| Apr | 29.6 C (85.3 F) | -5.9 C (21.4 F) | n/a | n/a |
| May | 31.1 C (88.0 F) | -3.2 C (26.2 F) | n/a | n/a |
| Jun | 36.2 C (97.2 F) | 0.8 C (33.4 F) | n/a | n/a |
| Jul | 37.6 C (99.7 F) | 3.5 C (38.3 F) | n/a | n/a |
| Aug | 35.1 C (95.2 F) | 4.1 C (39.4 F) | n/a | n/a |
| Sep | 34.8 C (94.6 F) | -0.4 C (31.3 F) | n/a | n/a |
| Oct | 27.0 C (80.6 F) | -6.0 C (21.2 F) | n/a | n/a |
| Nov | 18.6 C (65.5 F) | -9.5 C (14.9 F) | n/a | n/a |
| Dec | 17.5 C (63.5 F) | -21.0 C (-5.8 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1937 | 23 |
| 1938 | 49 |
| 1939 | 52 |
| 1940 | 47 |
| 1941 | 49 |
| 1942 | 46 |
| 1943 | 34 |
| 1944 | 32 |
| 1945 | 32 |
| 1946 | 33 |
| 1947 | 85 |
| 1948 | 42 |
| 1949 | 53 |
| 1950 | 18 |
| 1951 | 23 |
| 1952 | 52 |
| 1953 | 42 |
| 1954 | 28 |
| 1955 | 36 |
| 1956 | 69 |
| 1957 | 44 |
| 1958 | 41 |
| 1959 | 31 |
| 1960 | 41 |
| 1961 | 53 |
| 1962 | 65 |
| 1963 | 29 |
| 1964 | 36 |
| 1965 | 22 |
| 1966 | 40 |
| 1967 | 36 |
| 1968 | 38 |
| 1969 | 30 |
| 1970 | 17 |
| 1971 | 32 |
| 1972 | 27 |
| 1973 | 21 |
| 1974 | 16 |
Wettest Day of Each Month
Jun: 60.7 mm (2.4 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 26.4 mm (1.0 in) | 8 January 1965 |
| Feb | 30.3 mm (1.2 in) | 12 February 1962 |
| Mar | 26.5 mm (1.0 in) | 26 March 1963 |
| Apr | 28.4 mm (1.1 in) | 24 April 1968 |
| May | 49.7 mm (2.0 in) | 28 May 1941 |
| Jun | 60.7 mm (2.4 in) | 1 June 1961 |
| Jul | 41.3 mm (1.6 in) | 29 July 1965 |
| Aug | 51.4 mm (2.0 in) | 11 August 1958 |
| Sep | 50.3 mm (2.0 in) | 21 September 1967 |
| Oct | 37.8 mm (1.5 in) | 29 October 1953 |
| Nov | 45.5 mm (1.8 in) | 18 November 1971 |
| Dec | 45.6 mm (1.8 in) | 28 December 1947 |
Period of Record Coverage
1937 to 1974| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1937 | 332 | 91% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 364 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 365 | 100% | Yes |
| 1949 | 365 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 365 | 100% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 363 | 99% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 365 | 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 | 212 | 58% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 22 July 1974 | Darmstadt-Botanischer Garten, DE | daily low min (Tie) | 8.5 C (47.3 F) | tie | 5 years | 1 of 100 (Routine) |
| 20 July 1974 | Darmstadt-Botanischer Garten, DE | daily low max | 15.4 C (59.7 F) | 2.2 C (4.0 F) | 32 years | 16 of 100 (Routine) |
| 18 July 1974 | Darmstadt-Botanischer Garten, DE | daily rain | 24.8 mm (1.0 in) | 13.0 mm (0.5 in) | 25 years | 20 of 100 (Routine) |
| 8 July 1974 | Darmstadt-Botanischer Garten, DE | daily low min | 6.6 C (43.9 F) | 1.4 C (2.5 F) | 12 years | 10 of 100 (Routine) |
| 7 July 1974 | Darmstadt-Botanischer Garten, DE | daily low max | 15.7 C (60.3 F) | 1.1 C (2.0 F) | 28 years | 13 of 100 (Routine) |
| 28 June 1974 | Darmstadt-Botanischer Garten, DE | daily rain | 12.4 mm (0.5 in) | 4.3 mm (0.17 in) | 1 year | 8 of 100 (Routine) |
| 23 May 1974 | Darmstadt-Botanischer Garten, DE | daily rain | 10.8 mm (0.4 in) | 0.1 mm (0.00 in) | 7 years | 5 of 100 (Routine) |
| 13 May 1974 | Darmstadt-Botanischer Garten, DE | daily rain | 9.8 mm (0.39 in) | 4.6 mm (0.18 in) | 11 years | 14 of 100 (Routine) |
| 4 May 1974 | Darmstadt-Botanischer Garten, DE | daily rain | 16.5 mm (0.6 in) | 1.9 mm (0.07 in) | 8 years | 8 of 100 (Routine) |
| 26 April 1974 | Darmstadt-Botanischer Garten, DE | daily low max | 7.5 C (45.5 F) | 0.5 C (0.9 F) | 36 years | 15 of 100 (Routine) |
| 17 April 1974 | Darmstadt-Botanischer Garten, DE | daily low min | -0.6 C (30.9 F) | 0.4 C (0.7 F) | 8 years | 6 of 100 (Routine) |
| 10 April 1974 | Darmstadt-Botanischer Garten, DE | daily high max | 23.2 C (73.8 F) | 0.1 C (0.2 F) | 4 years | 4 of 100 (Routine) |
| 28 March 1974 | Darmstadt-Botanischer Garten, DE | daily high min | 9.5 C (49.1 F) | 0.5 C (0.9 F) | 16 years | 9 of 100 (Routine) |
| 27 March 1974 | Darmstadt-Botanischer Garten, DE | daily high max | 20.7 C (69.3 F) | 0.7 C (1.3 F) | 24 years | 11 of 100 (Routine) |
| 12 February 1974 | Darmstadt-Botanischer Garten, DE | daily high max (Tie) | 13.6 C (56.5 F) | tie | 16 years | 1 of 100 (Routine) |
| 11 February 1974 | Darmstadt-Botanischer Garten, DE | daily high min | 7.6 C (45.7 F) | 1.3 C (2.3 F) | 35 years | 15 of 100 (Routine) |
| 11 February 1974 | Darmstadt-Botanischer Garten, DE | daily high max | 15.6 C (60.1 F) | 3.0 C (5.4 F) | 16 years | 13 of 100 (Routine) |
| 10 February 1974 | Darmstadt-Botanischer Garten, DE | daily high min | 7.0 C (44.6 F) | 0.1 C (0.2 F) | 8 years | 5 of 100 (Routine) |
| 9 February 1974 | Darmstadt-Botanischer Garten, DE | daily high max (Tie) | 11.5 C (52.7 F) | tie | 24 years | 2 of 100 (Routine) |
| 5 February 1974 | Darmstadt-Botanischer Garten, DE | daily rain | 14.5 mm (0.6 in) | 3.6 mm (0.14 in) | 36 years | 20 of 100 (Routine) |
Climate Trend
36 complete years, 1938 to 1973| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1938 | 9.5 C | +0.12 C |
| 1939 | 9.2 C | -0.11 C |
| 1940 | 7.7 C | -1.66 C |
| 1941 | 8.2 C | -1.13 C |
| 1942 | 8.4 C | -0.90 C |
| 1943 | 9.8 C | +0.45 C |
| 1944 | 9.2 C | -0.11 C |
| 1945 | 10.0 C | +0.69 C |
| 1946 | 9.4 C | +0.06 C |
| 1947 | 10.1 C | +0.72 C |
| 1948 | 10.0 C | +0.68 C |
| 1949 | 10.3 C | +0.91 C |
| 1950 | 9.6 C | +0.27 C |
| 1951 | 9.8 C | +0.50 C |
| 1952 | 9.3 C | -0.07 C |
| 1953 | 10.0 C | +0.67 C |
| 1954 | 9.0 C | -0.36 C |
| 1955 | 8.6 C | -0.78 C |
| 1956 | 7.9 C | -1.44 C |
| 1957 | 9.6 C | +0.30 C |
| 1958 | 9.4 C | +0.02 C |
| 1959 | 10.2 C | +0.86 C |
| 1960 | 9.8 C | +0.46 C |
| 1961 | 10.1 C | +0.72 C |
| 1962 | 8.4 C | -0.96 C |
| 1963 | 8.2 C | -1.14 C |
| 1964 | 9.4 C | +0.08 C |
| 1965 | 8.9 C | -0.41 C |
| 1966 | 10.0 C | +0.69 C |
| 1967 | 10.1 C | +0.80 C |
| 1968 | 9.3 C | -0.02 C |
| 1969 | 9.1 C | -0.23 C |
| 1970 | 9.2 C | -0.14 C |
| 1971 | 9.7 C | +0.32 C |
| 1972 | 9.1 C | -0.27 C |
| 1973 | 9.6 C | +0.30 C |
The fitted trend in annual mean temperature here over 1938 to 1973 is 0.1 C (-0.2 to 0.3) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.3 to 0.5) per decade. The slope is a straight line fitted to 36 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 (-0.2 to 0.3) per decade | 0.1 F (-0.3 to 0.5) per decade | 1938 to 1973 | 36 | Not clearly different from zero |
| Mean daily maximum | 0.05 C (-0.23 to 0.33) per decade | 0.1 F (-0.4 to 0.6) per decade | 1938 to 1973 | 36 | Not clearly different from zero |
| Mean daily minimum | 0.1 C (-0.1 to 0.3) per decade | 0.2 F (-0.2 to 0.6) per decade | 1938 to 1973 | 36 | 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
1937 to 1974| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 37.6 C (99.7 F) | 1947 | 33.0 C (91.4 F) | 38 |
| Coldest night (TNn) | -26.9 C (-16.4 F) | 1940 | -14.5 C (5.8 F) | 38 |
| Wettest day (Rx1day) | 60.7 mm (2.4 in) | 1961 | 32.6 mm (1.3 in) | 38 |
| Wettest five days (Rx5day) | 116.3 mm (4.6 in) | 1961 | 60.6 mm (2.4 in) | 38 |
| Longest dry spell (CDD) | 39 days | 1956 | 22 days | 38 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1937 | 33.7 C (92.7 F) |
| 1938 | 33.1 C (91.6 F) |
| 1939 | 30.7 C (87.3 F) |
| 1940 | 29.4 C (84.9 F) |
| 1941 | 32.0 C (89.6 F) |
| 1942 | 32.4 C (90.3 F) |
| 1943 | 34.2 C (93.6 F) |
| 1944 | 35.1 C (95.2 F) |
| 1945 | 33.0 C (91.4 F) |
| 1946 | 33.2 C (91.8 F) |
| 1947 | 37.6 C (99.7 F) |
| 1948 | 32.0 C (89.6 F) |
| 1949 | 34.1 C (93.4 F) |
| 1950 | 33.0 C (91.4 F) |
| 1951 | 32.0 C (89.6 F) |
| 1952 | 36.6 C (97.9 F) |
| 1953 | 32.1 C (89.8 F) |
| 1954 | 32.0 C (89.6 F) |
| 1955 | 31.3 C (88.3 F) |
| 1956 | 28.0 C (82.4 F) |
| 1957 | 36.2 C (97.2 F) |
| 1958 | 30.0 C (86.0 F) |
| 1959 | 35.2 C (95.4 F) |
| 1960 | 30.2 C (86.4 F) |
| 1961 | 32.3 C (90.1 F) |
| 1962 | 33.8 C (92.8 F) |
| 1963 | 34.7 C (94.5 F) |
| 1964 | 34.8 C (94.6 F) |
| 1965 | 31.7 C (89.1 F) |
| 1966 | 34.5 C (94.1 F) |
| 1967 | 33.0 C (91.4 F) |
| 1968 | 30.9 C (87.6 F) |
| 1969 | 33.3 C (91.9 F) |
| 1970 | 31.8 C (89.2 F) |
| 1971 | 34.3 C (93.7 F) |
| 1972 | 33.0 C (91.4 F) |
| 1973 | 31.8 C (89.2 F) |
| 1974 | 29.5 C (85.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1937 | -10.0 C (14.0 F) |
| 1938 | -17.0 C (1.4 F) |
| 1939 | -21.0 C (-5.8 F) |
| 1940 | -26.9 C (-16.4 F) |
| 1941 | -15.3 C (4.5 F) |
| 1942 | -24.8 C (-12.6 F) |
| 1943 | -16.9 C (1.6 F) |
| 1944 | -11.1 C (12.0 F) |
| 1945 | -16.0 C (3.2 F) |
| 1946 | -15.5 C (4.1 F) |
| 1947 | -18.1 C (-0.6 F) |
| 1948 | -13.1 C (8.4 F) |
| 1949 | -12.9 C (8.8 F) |
| 1950 | -12.1 C (10.2 F) |
| 1951 | -7.0 C (19.4 F) |
| 1952 | -11.5 C (11.3 F) |
| 1953 | -14.6 C (5.7 F) |
| 1954 | -17.0 C (1.4 F) |
| 1955 | -14.5 C (5.9 F) |
| 1956 | -22.5 C (-8.5 F) |
| 1957 | -13.0 C (8.6 F) |
| 1958 | -9.0 C (15.8 F) |
| 1959 | -12.0 C (10.4 F) |
| 1960 | -18.0 C (-0.4 F) |
| 1961 | -13.1 C (8.4 F) |
| 1962 | -15.8 C (3.6 F) |
| 1963 | -19.1 C (-2.4 F) |
| 1964 | -13.7 C (7.3 F) |
| 1965 | -11.6 C (11.1 F) |
| 1966 | -17.0 C (1.4 F) |
| 1967 | -14.2 C (6.4 F) |
| 1968 | -19.0 C (-2.2 F) |
| 1969 | -16.0 C (3.2 F) |
| 1970 | -13.2 C (8.2 F) |
| 1971 | -16.5 C (2.3 F) |
| 1972 | -13.8 C (7.2 F) |
| 1973 | -14.5 C (5.9 F) |
| 1974 | -4.3 C (24.3 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1937 | 35.5 mm (1.4 in) |
| 1938 | 27.9 mm (1.1 in) |
| 1939 | 26.1 mm (1.0 in) |
| 1940 | 33.2 mm (1.3 in) |
| 1941 | 49.7 mm (2.0 in) |
| 1942 | 23.5 mm (0.9 in) |
| 1943 | 49.3 mm (1.9 in) |
| 1944 | 37.4 mm (1.5 in) |
| 1945 | 43.5 mm (1.7 in) |
| 1946 | 25.8 mm (1.0 in) |
| 1947 | 45.6 mm (1.8 in) |
| 1948 | 31.5 mm (1.2 in) |
| 1949 | 45.4 mm (1.8 in) |
| 1950 | 23.3 mm (0.9 in) |
| 1951 | 34.8 mm (1.4 in) |
| 1952 | 31.2 mm (1.2 in) |
| 1953 | 37.8 mm (1.5 in) |
| 1954 | 31.9 mm (1.3 in) |
| 1955 | 28.1 mm (1.1 in) |
| 1956 | 36.2 mm (1.4 in) |
| 1957 | 28.0 mm (1.1 in) |
| 1958 | 51.4 mm (2.0 in) |
| 1959 | 20.5 mm (0.8 in) |
| 1960 | 30.5 mm (1.2 in) |
| 1961 | 60.7 mm (2.4 in) |
| 1962 | 30.3 mm (1.2 in) |
| 1963 | 26.5 mm (1.0 in) |
| 1964 | 22.2 mm (0.9 in) |
| 1965 | 52.4 mm (2.1 in) |
| 1966 | 40.4 mm (1.6 in) |
| 1967 | 50.3 mm (2.0 in) |
| 1968 | 37.8 mm (1.5 in) |
| 1969 | 28.7 mm (1.1 in) |
| 1970 | 22.3 mm (0.9 in) |
| 1971 | 45.5 mm (1.8 in) |
| 1972 | 36.3 mm (1.4 in) |
| 1973 | 30.5 mm (1.2 in) |
| 1974 | 24.8 mm (1.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1937 | 47.0 mm (1.9 in) |
| 1938 | 51.4 mm (2.0 in) |
| 1939 | 61.9 mm (2.4 in) |
| 1940 | 100.4 mm (4.0 in) |
| 1941 | 62.2 mm (2.4 in) |
| 1942 | 62.7 mm (2.5 in) |
| 1943 | 57.8 mm (2.3 in) |
| 1944 | 53.2 mm (2.1 in) |
| 1945 | 65.8 mm (2.6 in) |
| 1946 | 44.2 mm (1.7 in) |
| 1947 | 89.7 mm (3.5 in) |
| 1948 | 72.0 mm (2.8 in) |
| 1949 | 54.6 mm (2.1 in) |
| 1950 | 42.5 mm (1.7 in) |
| 1951 | 59.3 mm (2.3 in) |
| 1952 | 63.0 mm (2.5 in) |
| 1953 | 76.6 mm (3.0 in) |
| 1954 | 39.5 mm (1.6 in) |
| 1955 | 72.5 mm (2.9 in) |
| 1956 | 55.5 mm (2.2 in) |
| 1957 | 67.6 mm (2.7 in) |
| 1958 | 78.7 mm (3.1 in) |
| 1959 | 46.1 mm (1.8 in) |
| 1960 | 41.0 mm (1.6 in) |
| 1961 | 116.3 mm (4.6 in) |
| 1962 | 52.6 mm (2.1 in) |
| 1963 | 43.5 mm (1.7 in) |
| 1964 | 75.7 mm (3.0 in) |
| 1965 | 115.0 mm (4.5 in) |
| 1966 | 83.6 mm (3.3 in) |
| 1967 | 64.6 mm (2.5 in) |
| 1968 | 89.8 mm (3.5 in) |
| 1969 | 54.9 mm (2.2 in) |
| 1970 | 48.8 mm (1.9 in) |
| 1971 | 81.9 mm (3.2 in) |
| 1972 | 55.4 mm (2.2 in) |
| 1973 | 51.6 mm (2.0 in) |
| 1974 | 37.5 mm (1.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1937 | 17 days |
| 1938 | 25 days |
| 1939 | 17 days |
| 1940 | 23 days |
| 1941 | 16 days |
| 1942 | 34 days |
| 1943 | 36 days |
| 1944 | 20 days |
| 1945 | 17 days |
| 1946 | 21 days |
| 1947 | 33 days |
| 1948 | 31 days |
| 1949 | 22 days |
| 1950 | 15 days |
| 1951 | 28 days |
| 1952 | 18 days |
| 1953 | 33 days |
| 1954 | 17 days |
| 1955 | 21 days |
| 1956 | 39 days |
| 1957 | 19 days |
| 1958 | 25 days |
| 1959 | 39 days |
| 1960 | 21 days |
| 1961 | 18 days |
| 1962 | 36 days |
| 1963 | 26 days |
| 1964 | 14 days |
| 1965 | 15 days |
| 1966 | 15 days |
| 1967 | 16 days |
| 1968 | 30 days |
| 1969 | 26 days |
| 1970 | 14 days |
| 1971 | 28 days |
| 1972 | 25 days |
| 1973 | 20 days |
| 1974 | 36 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
36 years with a frostAcross 36 years with a frost, the median last spring frost at Darmstadt-Botanischer Garten falls on 24 April and the median first autumn frost on 19 October, which leaves a median of 176 days between them.
Fitted over all years, the growing season changes by +0.4 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1944 to 1973) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 24 April | n/a | 24 April | n/a | -1.4 days per decade |
| First autumn frost | 19 October | n/a | 19 October | n/a | -0.9 days per decade |
| Growing days | 176 days | n/a | 174 days | n/a | +0.4 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
37 years, 1937 to 1973A day with at least 33.9 mm (1.3 in) of rain is expected about once in 2 years. A day with at least 67.4 mm (2.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 33.9 mm (1.3 in) | |
| 5 years | 43.3 mm (1.7 in) | |
| 10 years | 49.3 mm (1.9 in) | |
| 25 years | 56.8 mm (2.2 in) | |
| 50 years | 62.1 mm (2.4 in) | Longer than the 37 years of record |
| 100 years | 67.4 mm (2.7 in) | Longer than the 37 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, 37 years of values from 1937 to 1973.
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: 60.7 mm (2.4 in) in 1961; 52.4 mm (2.1 in) in 1965; 51.4 mm (2.0 in) in 1958.
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 (2025-12-31).