St Catharines Cda Weather Records (CA006137301)
Record envelope, standing records and threshold days for St Catharines Cda (CA006137301), Ontario, Canada, with 37 years of record.
Key Facts for St Catharines Cda
- St Catharines Cda (CA006137301) is a weather station in Ontario, Canada at 43.18 latitude and -79.23 longitude, 99 m (325 ft) above sea level.
- The station reports from 1928 to 1964, 37 years of record.
- 1,464 records set at St Catharines Cda still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- St Catharines Cda tied a daily record high minimum temperature of 12.8 C (55.0 F) on 28 October 1964.
About the Station
- Location: Ontario, Canada, 43.18 latitude, -79.23 longitude.
- Elevation: 99 m (325 ft).
- Period of record: 1928 to 1964, 37 years.
- Eligible elements: tmax, tmin, prcp, snow.
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 | 20.6 C (69.1 F) | -22.8 C (-9.0 F) | n/a | n/a |
| Feb | 18.9 C (66.0 F) | -24.4 C (-11.9 F) | n/a | n/a |
| Mar | 26.1 C (79.0 F) | -18.9 C (-2.0 F) | n/a | n/a |
| Apr | 29.4 C (84.9 F) | -9.4 C (15.1 F) | n/a | n/a |
| May | 33.3 C (91.9 F) | -2.2 C (28.0 F) | n/a | n/a |
| Jun | 36.7 C (98.1 F) | 0.0 C (32.0 F) | n/a | n/a |
| Jul | 40.0 C (104.0 F) | 5.0 C (41.0 F) | n/a | n/a |
| Aug | 36.7 C (98.1 F) | 5.0 C (41.0 F) | n/a | n/a |
| Sep | 36.1 C (97.0 F) | 0.6 C (33.1 F) | n/a | n/a |
| Oct | 30.6 C (87.1 F) | -5.6 C (21.9 F) | n/a | n/a |
| Nov | 27.2 C (81.0 F) | -13.3 C (8.1 F) | n/a | n/a |
| Dec | 17.2 C (63.0 F) | -20.6 C (-5.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1928 | 6 |
| 1929 | 57 |
| 1930 | 57 |
| 1931 | 46 |
| 1932 | 48 |
| 1933 | 66 |
| 1934 | 70 |
| 1935 | 47 |
| 1936 | 64 |
| 1937 | 31 |
| 1938 | 45 |
| 1939 | 31 |
| 1940 | 45 |
| 1941 | 41 |
| 1942 | 34 |
| 1943 | 41 |
| 1944 | 29 |
| 1945 | 68 |
| 1946 | 42 |
| 1947 | 35 |
| 1948 | 43 |
| 1949 | 43 |
| 1950 | 52 |
| 1951 | 32 |
| 1952 | 26 |
| 1953 | 27 |
| 1954 | 46 |
| 1955 | 27 |
| 1956 | 37 |
| 1957 | 40 |
| 1958 | 32 |
| 1959 | 26 |
| 1960 | 29 |
| 1961 | 22 |
| 1962 | 41 |
| 1963 | 18 |
| 1964 | 20 |
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 1962-07-23 | Record daily precipitation | Record daily precipitation 74.9 mm (2.9 in) |
Wettest Day of Each Month
Jul: 74.9 mm (2.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 42.9 mm (1.7 in) | 1 January 1932 |
| Feb | 62.2 mm (2.4 in) | 16 February 1954 |
| Mar | 46.5 mm (1.8 in) | 31 March 1945 |
| Apr | 34.5 mm (1.4 in) | 21 April 1937 |
| May | 50.8 mm (2.0 in) | 15 May 1942 |
| Jun | 47.8 mm (1.9 in) | 28 June 1957 |
| Jul | 74.9 mm (2.9 in) | 23 July 1962 |
| Aug | 74.9 mm (2.9 in) | 6 August 1962 |
| Sep | 61.5 mm (2.4 in) | 18 September 1945 |
| Oct | 51.6 mm (2.0 in) | 16 October 1943 |
| Nov | 39.1 mm (1.5 in) | 7 November 1941 |
| Dec | 38.1 mm (1.5 in) | 21 December 1949 |
Period of Record Coverage
1928 to 1964| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1928 | 60 | 16% | No |
| 1929 | 364 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 365 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 364 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 364 | 100% | Yes |
| 1943 | 351 | 96% | Yes |
| 1944 | 352 | 96% | Yes |
| 1945 | 363 | 99% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 357 | 98% | Yes |
| 1948 | 361 | 99% | 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 | 306 | 84% | No |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 364 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 362 | 99% | Yes |
| 1963 | 90 | 25% | No |
| 1964 | 210 | 57% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 28 October 1964 | St Catharines Cda, CA | daily high min (Tie) | 12.8 C (55.0 F) | tie | 17 years | 2 of 100 (Routine) |
| 11 October 1964 | St Catharines Cda, CA | daily low min | -2.2 C (28.0 F) | 0.5 C (0.9 F) | 27 years | 12 of 100 (Routine) |
| 10 October 1964 | St Catharines Cda, CA | daily low max | 5.6 C (42.1 F) | 3.3 C (5.9 F) | 19 years | 13 of 100 (Routine) |
| 7 October 1964 | St Catharines Cda, CA | daily low min (Tie) | -2.8 C (27.0 F) | tie | 29 years | 2 of 100 (Routine) |
| 23 September 1964 | St Catharines Cda, CA | daily high min (Tie) | 18.3 C (64.9 F) | tie | 25 years | 2 of 100 (Routine) |
| 16 September 1964 | St Catharines Cda, CA | daily low min | 2.2 C (36.0 F) | 2.2 C (4.0 F) | 5 years | 8 of 100 (Routine) |
| 31 August 1964 | St Catharines Cda, CA | daily high min (Tie) | 20.6 C (69.1 F) | tie | 34 years | 3 of 100 (Routine) |
| 22 August 1964 | St Catharines Cda, CA | daily rain | 40.4 mm (1.6 in) | 31.3 mm (1.2 in) | 23 years | 36 of 100 (Notable) |
| 21 August 1964 | St Catharines Cda, CA | daily low max | 17.2 C (63.0 F) | 1.1 C (2.0 F) | 3 years | 5 of 100 (Routine) |
| 15 August 1964 | St Catharines Cda, CA | daily low min | 9.4 C (48.9 F) | 1.2 C (2.2 F) | 2 years | 6 of 100 (Routine) |
| 14 August 1964 | St Catharines Cda, CA | daily low min | 7.8 C (46.0 F) | 1.1 C (2.0 F) | 23 years | 11 of 100 (Routine) |
| 14 August 1964 | St Catharines Cda, CA | daily low max (Tie) | 19.4 C (66.9 F) | tie | 30 years | 3 of 100 (Routine) |
| 13 August 1964 | St Catharines Cda, CA | daily low max | 20.0 C (68.0 F) | 1.1 C (2.0 F) | 23 years | 11 of 100 (Routine) |
| 12 August 1964 | St Catharines Cda, CA | daily low max (Tie) | 20.0 C (68.0 F) | tie | 23 years | 2 of 100 (Routine) |
| 11 August 1964 | St Catharines Cda, CA | daily rain | 45.7 mm (1.8 in) | 32.7 mm (1.3 in) | 33 years | 40 of 100 (Notable) |
| 11 August 1964 | St Catharines Cda, CA | daily low min | 9.4 C (48.9 F) | 2.3 C (4.1 F) | 34 years | 19 of 100 (Routine) |
| 9 August 1964 | St Catharines Cda, CA | daily low min | 9.4 C (48.9 F) | 0.6 C (1.1 F) | 35 years | 14 of 100 (Routine) |
| 9 August 1964 | St Catharines Cda, CA | daily low max | 19.4 C (66.9 F) | 2.3 C (4.1 F) | 2 years | 9 of 100 (Routine) |
| 8 August 1964 | St Catharines Cda, CA | daily low max | 19.4 C (66.9 F) | 1.7 C (3.1 F) | 9 years | 9 of 100 (Routine) |
| 6 August 1964 | St Catharines Cda, CA | daily low max (Tie) | 21.7 C (71.1 F) | tie | 8 years | 1 of 100 (Routine) |
Climate Trend
32 complete years, 1929 to 1962| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1929 | 8.1 C | -0.83 C |
| 1930 | 9.0 C | +0.07 C |
| 1931 | 10.1 C | +1.17 C |
| 1932 | 9.4 C | +0.42 C |
| 1933 | 9.1 C | +0.20 C |
| 1934 | 8.2 C | -0.69 C |
| 1935 | 8.5 C | -0.48 C |
| 1936 | 8.4 C | -0.49 C |
| 1937 | 9.1 C | +0.17 C |
| 1938 | 9.5 C | +0.54 C |
| 1939 | 9.0 C | +0.03 C |
| 1940 | 7.8 C | -1.11 C |
| 1941 | 9.4 C | +0.50 C |
| 1942 | 8.9 C | -0.06 C |
| 1943 | 8.3 C | -0.59 C |
| 1945 | 8.9 C | -0.02 C |
| 1946 | 10.0 C | +1.05 C |
| 1947 | 9.2 C | +0.30 C |
| 1948 | 8.6 C | -0.29 C |
| 1949 | 9.8 C | +0.90 C |
| 1950 | 8.4 C | -0.58 C |
| 1951 | 8.9 C | +0.01 C |
| 1952 | 9.7 C | +0.76 C |
| 1953 | 10.4 C | +1.50 C |
| 1954 | 8.9 C | -0.01 C |
| 1956 | 8.4 C | -0.55 C |
| 1957 | 9.1 C | +0.20 C |
| 1958 | 8.2 C | -0.76 C |
| 1959 | 8.9 C | -0.04 C |
| 1960 | 8.4 C | -0.55 C |
| 1961 | 8.8 C | -0.13 C |
| 1962 | 8.2 C | -0.75 C |
The fitted trend in annual mean temperature here over 1929 to 1962 is -0.04 C (-0.28 to 0.19) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.5 to 0.3) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.04 C (-0.28 to 0.19) per decade | -0.1 F (-0.5 to 0.3) per decade | 1929 to 1962 | 32 | Not clearly different from zero |
| Mean daily maximum | -0.01 C (-0.29 to 0.26) per decade | -0.03 F (-0.52 to 0.46) per decade | 1929 to 1962 | 32 | Not clearly different from zero |
| Mean daily minimum | -0.1 C (-0.3 to 0.2) per decade | -0.1 F (-0.5 to 0.3) per decade | 1929 to 1962 | 32 | 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
1928 to 1964| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.0 C (104.0 F) | 1936 | 34.4 C (93.9 F) | 37 |
| Coldest night (TNn) | -24.4 C (-11.9 F) | 1934 | -18.3 C (-0.9 F) | 37 |
| Wettest day (Rx1day) | 74.9 mm (2.9 in) | 1962 | 45.7 mm (1.8 in) | 37 |
| Wettest five days (Rx5day) | 117.9 mm (4.6 in) | 1945 | 63.2 mm (2.5 in) | 37 |
| Longest dry spell (CDD) | 28 days | 1943 | 16 days | 37 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1928 | 20.0 C (68.0 F) |
| 1929 | 33.9 C (93.0 F) |
| 1930 | 36.7 C (98.1 F) |
| 1931 | 36.7 C (98.1 F) |
| 1932 | 34.4 C (93.9 F) |
| 1933 | 36.7 C (98.1 F) |
| 1934 | 36.1 C (97.0 F) |
| 1935 | 34.4 C (93.9 F) |
| 1936 | 40.0 C (104.0 F) |
| 1937 | 33.3 C (91.9 F) |
| 1938 | 34.4 C (93.9 F) |
| 1939 | 35.6 C (96.1 F) |
| 1940 | 32.2 C (90.0 F) |
| 1941 | 36.7 C (98.1 F) |
| 1942 | 33.3 C (91.9 F) |
| 1943 | 33.3 C (91.9 F) |
| 1944 | 36.7 C (98.1 F) |
| 1945 | 33.3 C (91.9 F) |
| 1946 | 33.9 C (93.0 F) |
| 1947 | 34.4 C (93.9 F) |
| 1948 | 36.7 C (98.1 F) |
| 1949 | 35.6 C (96.1 F) |
| 1950 | 32.2 C (90.0 F) |
| 1951 | 32.8 C (91.0 F) |
| 1952 | 34.4 C (93.9 F) |
| 1953 | 36.1 C (97.0 F) |
| 1954 | 33.9 C (93.0 F) |
| 1955 | 36.1 C (97.0 F) |
| 1956 | 33.9 C (93.0 F) |
| 1957 | 34.4 C (93.9 F) |
| 1958 | 31.7 C (89.1 F) |
| 1959 | 34.4 C (93.9 F) |
| 1960 | 32.2 C (90.0 F) |
| 1961 | 32.8 C (91.0 F) |
| 1962 | 33.3 C (91.9 F) |
| 1963 | 21.1 C (70.0 F) |
| 1964 | 33.9 C (93.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1928 | -12.8 C (9.0 F) |
| 1929 | -19.4 C (-2.9 F) |
| 1930 | -17.2 C (1.0 F) |
| 1931 | -16.7 C (1.9 F) |
| 1932 | -13.9 C (7.0 F) |
| 1933 | -20.0 C (-4.0 F) |
| 1934 | -24.4 C (-11.9 F) |
| 1935 | -20.6 C (-5.1 F) |
| 1936 | -19.4 C (-2.9 F) |
| 1937 | -14.4 C (6.1 F) |
| 1938 | -22.2 C (-8.0 F) |
| 1939 | -18.9 C (-2.0 F) |
| 1940 | -17.2 C (1.0 F) |
| 1941 | -15.0 C (5.0 F) |
| 1942 | -21.1 C (-6.0 F) |
| 1943 | -23.3 C (-9.9 F) |
| 1944 | -17.2 C (1.0 F) |
| 1945 | -22.8 C (-9.0 F) |
| 1946 | -16.7 C (1.9 F) |
| 1947 | -15.6 C (3.9 F) |
| 1948 | -19.4 C (-2.9 F) |
| 1949 | -15.6 C (3.9 F) |
| 1950 | -18.9 C (-2.0 F) |
| 1951 | -17.8 C (0.0 F) |
| 1952 | -15.0 C (5.0 F) |
| 1953 | -12.8 C (9.0 F) |
| 1954 | -18.3 C (-0.9 F) |
| 1955 | -15.0 C (5.0 F) |
| 1956 | -16.1 C (3.0 F) |
| 1957 | -18.3 C (-0.9 F) |
| 1958 | -20.0 C (-4.0 F) |
| 1959 | -18.3 C (-0.9 F) |
| 1960 | -17.8 C (0.0 F) |
| 1961 | -19.4 C (-2.9 F) |
| 1962 | -19.4 C (-2.9 F) |
| 1963 | -22.2 C (-8.0 F) |
| 1964 | -5.0 C (23.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1928 | 14.5 mm (0.6 in) |
| 1929 | 45.7 mm (1.8 in) |
| 1930 | 37.8 mm (1.5 in) |
| 1931 | 36.1 mm (1.4 in) |
| 1932 | 51.6 mm (2.0 in) |
| 1933 | 42.4 mm (1.7 in) |
| 1934 | 35.6 mm (1.4 in) |
| 1935 | 49.3 mm (1.9 in) |
| 1936 | 30.0 mm (1.2 in) |
| 1937 | 34.5 mm (1.4 in) |
| 1938 | 73.2 mm (2.9 in) |
| 1939 | 46.0 mm (1.8 in) |
| 1940 | 34.3 mm (1.4 in) |
| 1941 | 47.0 mm (1.9 in) |
| 1942 | 55.9 mm (2.2 in) |
| 1943 | 51.6 mm (2.0 in) |
| 1944 | 34.3 mm (1.4 in) |
| 1945 | 61.5 mm (2.4 in) |
| 1946 | 47.5 mm (1.9 in) |
| 1947 | 43.9 mm (1.7 in) |
| 1948 | 61.0 mm (2.4 in) |
| 1949 | 41.9 mm (1.6 in) |
| 1950 | 32.0 mm (1.3 in) |
| 1951 | 34.3 mm (1.4 in) |
| 1952 | 51.8 mm (2.0 in) |
| 1953 | 50.8 mm (2.0 in) |
| 1954 | 62.2 mm (2.4 in) |
| 1955 | 44.2 mm (1.7 in) |
| 1956 | 49.5 mm (1.9 in) |
| 1957 | 47.8 mm (1.9 in) |
| 1958 | 30.5 mm (1.2 in) |
| 1959 | 31.8 mm (1.3 in) |
| 1960 | 28.4 mm (1.1 in) |
| 1961 | 49.0 mm (1.9 in) |
| 1962 | 74.9 mm (2.9 in) |
| 1963 | 14.5 mm (0.6 in) |
| 1964 | 60.2 mm (2.4 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1928 | 31.8 mm (1.3 in) |
| 1929 | 74.9 mm (2.9 in) |
| 1930 | 54.5 mm (2.1 in) |
| 1931 | 46.2 mm (1.8 in) |
| 1932 | 84.6 mm (3.3 in) |
| 1933 | 50.5 mm (2.0 in) |
| 1934 | 57.9 mm (2.3 in) |
| 1935 | 60.0 mm (2.4 in) |
| 1936 | 54.7 mm (2.2 in) |
| 1937 | 63.2 mm (2.5 in) |
| 1938 | 83.6 mm (3.3 in) |
| 1939 | 64.0 mm (2.5 in) |
| 1940 | 59.2 mm (2.3 in) |
| 1941 | 80.0 mm (3.1 in) |
| 1942 | 76.2 mm (3.0 in) |
| 1943 | 66.1 mm (2.6 in) |
| 1944 | 79.3 mm (3.1 in) |
| 1945 | 117.9 mm (4.6 in) |
| 1946 | 85.1 mm (3.4 in) |
| 1947 | 70.7 mm (2.8 in) |
| 1948 | 61.0 mm (2.4 in) |
| 1949 | 62.4 mm (2.5 in) |
| 1950 | 70.6 mm (2.8 in) |
| 1951 | 52.1 mm (2.1 in) |
| 1952 | 56.4 mm (2.2 in) |
| 1953 | 56.2 mm (2.2 in) |
| 1954 | 84.8 mm (3.3 in) |
| 1955 | 83.7 mm (3.3 in) |
| 1956 | 68.1 mm (2.7 in) |
| 1957 | 61.8 mm (2.4 in) |
| 1958 | 47.2 mm (1.9 in) |
| 1959 | 53.4 mm (2.1 in) |
| 1960 | 54.8 mm (2.2 in) |
| 1961 | 75.4 mm (3.0 in) |
| 1962 | 88.7 mm (3.5 in) |
| 1963 | 37.9 mm (1.5 in) |
| 1964 | 80.0 mm (3.1 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1928 | 11 days |
| 1929 | 19 days |
| 1930 | 24 days |
| 1931 | 16 days |
| 1932 | 14 days |
| 1933 | 15 days |
| 1934 | 17 days |
| 1935 | 17 days |
| 1936 | 23 days |
| 1937 | 16 days |
| 1938 | 15 days |
| 1939 | 20 days |
| 1940 | 19 days |
| 1941 | 22 days |
| 1942 | 16 days |
| 1943 | 28 days |
| 1944 | 14 days |
| 1945 | 17 days |
| 1946 | 13 days |
| 1947 | 18 days |
| 1948 | 20 days |
| 1949 | 18 days |
| 1950 | 15 days |
| 1951 | 15 days |
| 1952 | 16 days |
| 1953 | 13 days |
| 1954 | 14 days |
| 1955 | 16 days |
| 1956 | 15 days |
| 1957 | 23 days |
| 1958 | 14 days |
| 1959 | 15 days |
| 1960 | 13 days |
| 1961 | 19 days |
| 1962 | 18 days |
| 1963 | 7 days |
| 1964 | 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
32 years with a frostAcross 32 years with a frost, the median last spring frost at St Catharines Cda falls on 3 May and the median first autumn frost on 17 October, which leaves a median of 165 days between them.
Fitted over all years, the growing season changes by -0.1 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1931 to 1962) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 3 May | n/a | 4 May | n/a | +2.1 days per decade |
| First autumn frost | 17 October | n/a | 17 October | n/a | +2.0 days per decade |
| Growing days | 165 days | n/a | 164 days | n/a | -0.1 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
33 years, 1929 to 1962A day with at least 44.0 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 81.5 mm (3.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 44.0 mm (1.7 in) | |
| 5 years | 55.0 mm (2.2 in) | |
| 10 years | 61.9 mm (2.4 in) | |
| 25 years | 70.1 mm (2.8 in) | |
| 50 years | 75.9 mm (3.0 in) | Longer than the 33 years of record |
| 100 years | 81.5 mm (3.2 in) | Longer than the 33 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, 33 years of values from 1929 to 1962.
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: 74.9 mm (2.9 in) in 1962; 73.2 mm (2.9 in) in 1938; 62.2 mm (2.4 in) in 1954.
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 (2026-10-17).