Stanford Weather Records (USC00247858)
Record envelope, standing records and threshold days for Stanford (USC00247858), Montana, United States, with 38 years of record.
Key Facts for Stanford
- Stanford (USC00247858) is a weather station in Montana, United States at 47.15 latitude and -110.22 longitude, 1,305 m (4,281 ft) above sea level.
- The station reports from 1927 to 1964, 38 years of record.
- 1,464 records set at Stanford still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Stanford set a monthly record low minimum temperature of -36.7 C (-34.1 F) on 17 December 1964.
About the Station
- Location: Montana, United States, 47.15 latitude, -110.22 longitude.
- Elevation: 1,305 m (4,281 ft).
- Period of record: 1927 to 1964, 38 years.
- Eligible elements: tmax, tmin, prcp.
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 | 20.0 C (68.0 F) | -41.1 C (-42.0 F) | n/a | n/a |
| Feb | 20.6 C (69.1 F) | -42.2 C (-44.0 F) | n/a | n/a |
| Mar | 22.8 C (73.0 F) | -33.9 C (-29.0 F) | n/a | n/a |
| Apr | 30.6 C (87.1 F) | -28.3 C (-18.9 F) | n/a | n/a |
| May | 33.3 C (91.9 F) | -16.7 C (1.9 F) | n/a | n/a |
| Jun | 38.9 C (102.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Jul | 38.9 C (102.0 F) | -0.6 C (30.9 F) | n/a | n/a |
| Aug | 40.0 C (104.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Sep | 35.0 C (95.0 F) | -9.4 C (15.1 F) | n/a | n/a |
| Oct | 31.1 C (88.0 F) | -21.1 C (-6.0 F) | n/a | n/a |
| Nov | 25.0 C (77.0 F) | -37.2 C (-35.0 F) | n/a | n/a |
| Dec | 21.1 C (70.0 F) | -36.7 C (-34.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1927 | 31 |
| 1928 | 57 |
| 1929 | 41 |
| 1930 | 47 |
| 1931 | 46 |
| 1932 | 51 |
| 1933 | 36 |
| 1934 | 73 |
| 1935 | 29 |
| 1936 | 98 |
| 1937 | 45 |
| 1938 | 32 |
| 1939 | 48 |
| 1940 | 32 |
| 1941 | 27 |
| 1942 | 34 |
| 1943 | 50 |
| 1944 | 20 |
| 1945 | 28 |
| 1946 | 21 |
| 1947 | 27 |
| 1948 | 19 |
| 1949 | 36 |
| 1950 | 59 |
| 1951 | 47 |
| 1952 | 26 |
| 1953 | 30 |
| 1954 | 43 |
| 1955 | 40 |
| 1956 | 37 |
| 1957 | 24 |
| 1958 | 27 |
| 1959 | 35 |
| 1960 | 40 |
| 1961 | 32 |
| 1962 | 37 |
| 1963 | 30 |
| 1964 | 29 |
All-Time Record Progression
2 new records| Date | Kind | Detail |
|---|---|---|
| 1961-08-05 | Record high maximum temperature | Record high maximum temperature 40.0 C (104.0 F) |
| 1964-06-08 | Record daily precipitation | Record daily precipitation 63.8 mm (2.5 in) |
Wettest Day of Each Month
Jun: 63.8 mm (2.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 12.7 mm (0.5 in) | 22 January 1948 |
| Feb | 25.7 mm (1.0 in) | 22 February 1937 |
| Mar | 16.3 mm (0.6 in) | 29 March 1930 |
| Apr | 18.5 mm (0.7 in) | 16 April 1927 |
| May | 42.7 mm (1.7 in) | 31 May 1935 |
| Jun | 63.8 mm (2.5 in) | 8 June 1964 |
| Jul | 41.1 mm (1.6 in) | 19 July 1932 |
| Aug | 38.6 mm (1.5 in) | 22 August 1933 |
| Sep | 46.0 mm (1.8 in) | 7 September 1941 |
| Oct | 25.4 mm (1.0 in) | 15 October 1938 |
| Nov | 25.9 mm (1.0 in) | 5 November 1927 |
| Dec | 24.1 mm (0.9 in) | 12 December 1937 |
Period of Record Coverage
1927 to 1964| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1927 | 255 | 70% | No |
| 1928 | 361 | 99% | Yes |
| 1929 | 361 | 99% | Yes |
| 1930 | 364 | 100% | Yes |
| 1931 | 365 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 364 | 100% | Yes |
| 1934 | 364 | 100% | Yes |
| 1935 | 354 | 97% | Yes |
| 1936 | 364 | 99% | Yes |
| 1937 | 364 | 100% | Yes |
| 1938 | 362 | 99% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 365 | 100% | Yes |
| 1941 | 364 | 100% | Yes |
| 1942 | 364 | 100% | Yes |
| 1943 | 364 | 100% | Yes |
| 1944 | 364 | 99% | Yes |
| 1945 | 364 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 364 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 365 | 100% | Yes |
| 1954 | 364 | 100% | Yes |
| 1955 | 363 | 99% | Yes |
| 1956 | 363 | 99% | Yes |
| 1957 | 363 | 99% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 365 | 100% | Yes |
| 1961 | 364 | 100% | Yes |
| 1962 | 350 | 96% | Yes |
| 1963 | 339 | 93% | Yes |
| 1964 | 306 | 84% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 17 December 1964 | Stanford, US | monthly low min | -36.7 C (-34.1 F) | 2.3 C (4.1 F) | 16 years | 19 of 100 (Routine) |
| 16 December 1964 | Stanford, US | monthly low max | -31.1 C (-24.0 F) | 7.2 C (13.0 F) | 8 years | 24 of 100 (Routine) |
| 16 December 1964 | Stanford, US | monthly low min (Tie) | -34.4 C (-29.9 F) | tie | 16 years | 4 of 100 (Routine) |
| 2 December 1964 | Stanford, US | daily low max | -10.6 C (12.9 F) | 2.3 C (4.1 F) | 22 years | 12 of 100 (Routine) |
| 1 December 1964 | Stanford, US | daily rain | 8.9 mm (0.35 in) | 6.4 mm (0.25 in) | 35 years | 20 of 100 (Routine) |
| 29 November 1964 | Stanford, US | daily low min | -23.3 C (-9.9 F) | 1.1 C (2.0 F) | 35 years | 14 of 100 (Routine) |
| 28 November 1964 | Stanford, US | daily low min | -23.3 C (-9.9 F) | 2.7 C (4.9 F) | 35 years | 16 of 100 (Routine) |
| 28 November 1964 | Stanford, US | daily low max | -12.8 C (9.0 F) | 4.5 C (8.1 F) | 9 years | 11 of 100 (Routine) |
| 27 November 1964 | Stanford, US | daily low max | -11.1 C (12.0 F) | 0.5 C (0.9 F) | 9 years | 5 of 100 (Routine) |
| 27 November 1964 | Stanford, US | daily low min | -21.1 C (-6.0 F) | 0.5 C (0.9 F) | 9 years | 5 of 100 (Routine) |
| 25 November 1964 | Stanford, US | daily rain | 6.4 mm (0.25 in) | 1.1 mm (0.04 in) | 5 years | 7 of 100 (Routine) |
| 7 November 1964 | Stanford, US | daily high max | 20.6 C (69.1 F) | 1.2 C (2.2 F) | 34 years | 14 of 100 (Routine) |
| 7 November 1964 | Stanford, US | daily high min (Tie) | 3.9 C (39.0 F) | tie | 33 years | 3 of 100 (Routine) |
| 25 October 1964 | Stanford, US | daily high max | 23.3 C (73.9 F) | 0.5 C (0.9 F) | 35 years | 13 of 100 (Routine) |
| 24 October 1964 | Stanford, US | daily high max | 24.4 C (75.9 F) | 1.6 C (2.9 F) | 35 years | 15 of 100 (Routine) |
| 1 October 1964 | Stanford, US | daily rain | 7.6 mm (0.30 in) | 4.6 mm (0.18 in) | 6 years | 14 of 100 (Routine) |
| 24 August 1964 | Stanford, US | daily low max | 16.1 C (61.0 F) | 1.7 C (3.1 F) | 13 years | 9 of 100 (Routine) |
| 20 August 1964 | Stanford, US | daily low max | 12.2 C (54.0 F) | 5.6 C (10.1 F) | 5 years | 15 of 100 (Routine) |
| 19 August 1964 | Stanford, US | daily high max (Tie) | 35.0 C (95.0 F) | tie | 22 years | 2 of 100 (Routine) |
| 18 August 1964 | Stanford, US | daily high max | 37.2 C (99.0 F) | 2.8 C (5.0 F) | 16 years | 12 of 100 (Routine) |
Climate Trend
35 complete years, 1928 to 1962| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1928 | 6.2 C | 0.00 C |
| 1929 | 4.6 C | -1.68 C |
| 1930 | 6.7 C | +0.51 C |
| 1931 | 8.0 C | +1.72 C |
| 1932 | 6.0 C | -0.22 C |
| 1933 | 6.9 C | +0.70 C |
| 1934 | 8.5 C | +2.27 C |
| 1935 | 6.6 C | +0.41 C |
| 1936 | 6.2 C | 0.00 C |
| 1937 | 5.1 C | -1.15 C |
| 1938 | 6.5 C | +0.24 C |
| 1939 | 7.2 C | +1.01 C |
| 1940 | 6.8 C | +0.57 C |
| 1941 | 6.6 C | +0.40 C |
| 1942 | 6.1 C | -0.15 C |
| 1943 | 5.7 C | -0.54 C |
| 1944 | 6.0 C | -0.21 C |
| 1945 | 5.6 C | -0.64 C |
| 1946 | 6.3 C | +0.08 C |
| 1947 | 5.9 C | -0.33 C |
| 1948 | 5.1 C | -1.13 C |
| 1949 | 5.7 C | -0.51 C |
| 1950 | 4.6 C | -1.61 C |
| 1951 | 3.9 C | -2.29 C |
| 1952 | 6.9 C | +0.63 C |
| 1953 | 7.9 C | +1.67 C |
| 1954 | 6.3 C | +0.08 C |
| 1955 | 4.7 C | -1.57 C |
| 1956 | 6.7 C | +0.51 C |
| 1957 | 6.0 C | -0.22 C |
| 1958 | 7.0 C | +0.80 C |
| 1959 | 5.8 C | -0.40 C |
| 1960 | 6.2 C | 0.00 C |
| 1961 | 7.2 C | +0.97 C |
| 1962 | 6.5 C | +0.24 C |
The fitted trend in annual mean temperature here over 1928 to 1962 is -0.1 C (-0.4 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.2 F (-0.8 to 0.4) per decade. The slope is a straight line fitted to 35 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 (-0.4 to 0.2) per decade | -0.2 F (-0.8 to 0.4) per decade | 1928 to 1962 | 35 | Not clearly different from zero |
| Mean daily maximum | -0.1 C (-0.5 to 0.2) per decade | -0.2 F (-0.9 to 0.4) per decade | 1928 to 1962 | 35 | Not clearly different from zero |
| Mean daily minimum | -0.1 C (-0.4 to 0.3) per decade | -0.2 F (-0.8 to 0.5) per decade | 1928 to 1962 | 35 | 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
1927 to 1964| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.0 C (104.0 F) | 1961 | 35.9 C (96.5 F) | 38 |
| Coldest night (TNn) | -42.2 C (-44.0 F) | 1936 | -34.7 C (-30.5 F) | 38 |
| Wettest day (Rx1day) | 63.8 mm (2.5 in) | 1964 | 31.6 mm (1.2 in) | 38 |
| Wettest five days (Rx5day) | 122.9 mm (4.8 in) | 1964 | 49.5 mm (1.9 in) | 38 |
| Longest dry spell (CDD) | 54 days | 1935 | 29 days | 38 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1927 | 32.8 C (91.0 F) |
| 1928 | 35.6 C (96.1 F) |
| 1929 | 38.9 C (102.0 F) |
| 1930 | 36.7 C (98.1 F) |
| 1931 | 38.9 C (102.0 F) |
| 1932 | 35.0 C (95.0 F) |
| 1933 | 38.9 C (102.0 F) |
| 1934 | 38.3 C (100.9 F) |
| 1935 | 35.6 C (96.1 F) |
| 1936 | 38.9 C (102.0 F) |
| 1937 | 37.8 C (100.0 F) |
| 1938 | 33.3 C (91.9 F) |
| 1939 | 37.2 C (99.0 F) |
| 1940 | 38.9 C (102.0 F) |
| 1941 | 36.1 C (97.0 F) |
| 1942 | 35.0 C (95.0 F) |
| 1943 | 35.0 C (95.0 F) |
| 1944 | 33.3 C (91.9 F) |
| 1945 | 35.0 C (95.0 F) |
| 1946 | 35.0 C (95.0 F) |
| 1947 | 36.1 C (97.0 F) |
| 1948 | 35.0 C (95.0 F) |
| 1949 | 38.3 C (100.9 F) |
| 1950 | 33.9 C (93.0 F) |
| 1951 | 36.1 C (97.0 F) |
| 1952 | 35.6 C (96.1 F) |
| 1953 | 37.8 C (100.0 F) |
| 1954 | 35.0 C (95.0 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 35.0 C (95.0 F) |
| 1957 | 33.9 C (93.0 F) |
| 1958 | 35.0 C (95.0 F) |
| 1959 | 35.0 C (95.0 F) |
| 1960 | 36.7 C (98.1 F) |
| 1961 | 40.0 C (104.0 F) |
| 1962 | 33.3 C (91.9 F) |
| 1963 | 37.8 C (100.0 F) |
| 1964 | 37.2 C (99.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1927 | -32.2 C (-26.0 F) |
| 1928 | -31.7 C (-25.1 F) |
| 1929 | -41.1 C (-42.0 F) |
| 1930 | -36.1 C (-33.0 F) |
| 1931 | -23.9 C (-11.0 F) |
| 1932 | -36.7 C (-34.1 F) |
| 1933 | -34.4 C (-29.9 F) |
| 1934 | -31.1 C (-24.0 F) |
| 1935 | -35.0 C (-31.0 F) |
| 1936 | -42.2 C (-44.0 F) |
| 1937 | -35.0 C (-31.0 F) |
| 1938 | -35.0 C (-31.0 F) |
| 1939 | -41.7 C (-43.1 F) |
| 1940 | -31.7 C (-25.1 F) |
| 1941 | -28.9 C (-20.0 F) |
| 1942 | -35.0 C (-31.0 F) |
| 1943 | -36.7 C (-34.1 F) |
| 1944 | -28.3 C (-18.9 F) |
| 1945 | -32.8 C (-27.0 F) |
| 1946 | -27.2 C (-17.0 F) |
| 1947 | -32.8 C (-27.0 F) |
| 1948 | -34.4 C (-29.9 F) |
| 1949 | -36.1 C (-33.0 F) |
| 1950 | -37.2 C (-35.0 F) |
| 1951 | -32.8 C (-27.0 F) |
| 1952 | -35.0 C (-31.0 F) |
| 1953 | -24.4 C (-11.9 F) |
| 1954 | -38.9 C (-38.0 F) |
| 1955 | -36.1 C (-33.0 F) |
| 1956 | -32.2 C (-26.0 F) |
| 1957 | -37.2 C (-35.0 F) |
| 1958 | -30.0 C (-22.0 F) |
| 1959 | -37.2 C (-35.0 F) |
| 1960 | -33.9 C (-29.0 F) |
| 1961 | -30.0 C (-22.0 F) |
| 1962 | -35.0 C (-31.0 F) |
| 1963 | -33.3 C (-27.9 F) |
| 1964 | -36.7 C (-34.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1927 | 26.2 mm (1.0 in) |
| 1928 | 39.1 mm (1.5 in) |
| 1929 | 32.0 mm (1.3 in) |
| 1930 | 17.0 mm (0.7 in) |
| 1931 | 31.2 mm (1.2 in) |
| 1932 | 47.2 mm (1.9 in) |
| 1933 | 56.4 mm (2.2 in) |
| 1934 | 39.9 mm (1.6 in) |
| 1935 | 42.7 mm (1.7 in) |
| 1936 | 15.7 mm (0.6 in) |
| 1937 | 25.7 mm (1.0 in) |
| 1938 | 41.9 mm (1.6 in) |
| 1939 | 20.6 mm (0.8 in) |
| 1940 | 25.7 mm (1.0 in) |
| 1941 | 46.0 mm (1.8 in) |
| 1942 | 33.3 mm (1.3 in) |
| 1943 | 41.4 mm (1.6 in) |
| 1944 | 26.2 mm (1.0 in) |
| 1945 | 36.6 mm (1.4 in) |
| 1946 | 32.3 mm (1.3 in) |
| 1947 | 53.8 mm (2.1 in) |
| 1948 | 57.9 mm (2.3 in) |
| 1949 | 51.1 mm (2.0 in) |
| 1950 | 29.2 mm (1.1 in) |
| 1951 | 16.0 mm (0.6 in) |
| 1952 | 21.8 mm (0.9 in) |
| 1953 | 38.9 mm (1.5 in) |
| 1954 | 34.8 mm (1.4 in) |
| 1955 | 17.8 mm (0.7 in) |
| 1956 | 23.1 mm (0.9 in) |
| 1957 | 36.8 mm (1.4 in) |
| 1958 | 21.3 mm (0.8 in) |
| 1959 | 19.1 mm (0.8 in) |
| 1960 | 15.7 mm (0.6 in) |
| 1961 | 29.2 mm (1.1 in) |
| 1962 | 21.3 mm (0.8 in) |
| 1963 | 26.7 mm (1.1 in) |
| 1964 | 63.8 mm (2.5 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1927 | 75.8 mm (3.0 in) |
| 1928 | 71.9 mm (2.8 in) |
| 1929 | 56.4 mm (2.2 in) |
| 1930 | 25.6 mm (1.0 in) |
| 1931 | 48.0 mm (1.9 in) |
| 1932 | 95.7 mm (3.8 in) |
| 1933 | 67.3 mm (2.6 in) |
| 1934 | 49.4 mm (1.9 in) |
| 1935 | 49.5 mm (1.9 in) |
| 1936 | 26.9 mm (1.1 in) |
| 1937 | 46.1 mm (1.8 in) |
| 1938 | 68.4 mm (2.7 in) |
| 1939 | 39.8 mm (1.6 in) |
| 1940 | 41.8 mm (1.6 in) |
| 1941 | 49.1 mm (1.9 in) |
| 1942 | 68.1 mm (2.7 in) |
| 1943 | 63.7 mm (2.5 in) |
| 1944 | 43.1 mm (1.7 in) |
| 1945 | 67.5 mm (2.7 in) |
| 1946 | 63.1 mm (2.5 in) |
| 1947 | 98.0 mm (3.9 in) |
| 1948 | 96.5 mm (3.8 in) |
| 1949 | 54.4 mm (2.1 in) |
| 1950 | 56.2 mm (2.2 in) |
| 1951 | 32.3 mm (1.3 in) |
| 1952 | 38.1 mm (1.5 in) |
| 1953 | 60.0 mm (2.4 in) |
| 1954 | 62.5 mm (2.5 in) |
| 1955 | 24.4 mm (1.0 in) |
| 1956 | 49.5 mm (1.9 in) |
| 1957 | 67.6 mm (2.7 in) |
| 1958 | 38.7 mm (1.5 in) |
| 1959 | 33.2 mm (1.3 in) |
| 1960 | 31.8 mm (1.3 in) |
| 1961 | 35.3 mm (1.4 in) |
| 1962 | 40.4 mm (1.6 in) |
| 1963 | 41.0 mm (1.6 in) |
| 1964 | 122.9 mm (4.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1927 | 21 days |
| 1928 | 25 days |
| 1929 | 26 days |
| 1930 | 20 days |
| 1931 | 33 days |
| 1932 | 22 days |
| 1933 | 31 days |
| 1934 | 35 days |
| 1935 | 54 days |
| 1936 | 29 days |
| 1937 | 53 days |
| 1938 | 24 days |
| 1939 | 31 days |
| 1940 | 32 days |
| 1941 | 23 days |
| 1942 | 37 days |
| 1943 | 34 days |
| 1944 | 34 days |
| 1945 | 27 days |
| 1946 | 22 days |
| 1947 | 27 days |
| 1948 | 35 days |
| 1949 | 31 days |
| 1950 | 22 days |
| 1951 | 25 days |
| 1952 | 23 days |
| 1953 | 26 days |
| 1954 | 33 days |
| 1955 | 26 days |
| 1956 | 28 days |
| 1957 | 24 days |
| 1958 | 33 days |
| 1959 | 42 days |
| 1960 | 42 days |
| 1961 | 26 days |
| 1962 | 36 days |
| 1963 | 32 days |
| 1964 | 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
35 years with a frostAcross 35 years with a frost, the median last spring frost at Stanford falls on 4 June and the median first autumn frost on 14 September, which leaves a median of 103 days between them.
Fitted over all years, the growing season changes by -1.5 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1933 to 1962) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 4 June | n/a | 4 June | n/a | -0.9 days per decade |
| First autumn frost | 14 September | n/a | 15 September | n/a | -2.4 days per decade |
| Growing days | 103 days | n/a | 104 days | n/a | -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
36 years, 1928 to 1963A day with at least 30.9 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 67.9 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 | 30.9 mm (1.2 in) | |
| 5 years | 42.2 mm (1.7 in) | |
| 10 years | 49.1 mm (1.9 in) | |
| 25 years | 57.2 mm (2.3 in) | |
| 50 years | 62.7 mm (2.5 in) | Longer than the 36 years of record |
| 100 years | 67.9 mm (2.7 in) | Longer than the 36 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, 36 years of values from 1928 to 1963.
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: 57.9 mm (2.3 in) in 1948; 56.4 mm (2.2 in) in 1933; 53.8 mm (2.1 in) in 1947.
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).