Lewiston Weather Records (USC00304715)
Record envelope, standing records and threshold days for Lewiston (USC00304715), New York, United States, with 92 years of record.
Key Facts for Lewiston
- Lewiston (USC00304715) is a weather station in New York, United States at 43.18 latitude and -79.04 longitude, 108 m (355 ft) above sea level.
- The station reports from 1935 to 2026, 92 years of record.
- 1,464 records set at Lewiston still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Lewiston set an all-time record daily precipitation of 97.5 mm (3.8 in) on 28 July 2026.
About the Station
- Location: New York, United States, 43.18 latitude, -79.04 longitude.
- Elevation: 108 m (355 ft).
- Period of record: 1935 to 2026, 92 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 | 20.0 C (68.0 F) | -22.8 C (-9.0 F) | n/a | n/a |
| Feb | 18.3 C (64.9 F) | -23.9 C (-11.0 F) | n/a | n/a |
| Mar | 25.6 C (78.1 F) | -20.6 C (-5.1 F) | n/a | n/a |
| Apr | 30.0 C (86.0 F) | -11.7 C (10.9 F) | n/a | n/a |
| May | 33.9 C (93.0 F) | -2.8 C (27.0 F) | n/a | n/a |
| Jun | 35.0 C (95.0 F) | 0.6 C (33.1 F) | n/a | n/a |
| Jul | 41.1 C (106.0 F) | 5.6 C (42.1 F) | n/a | n/a |
| Aug | 38.3 C (100.9 F) | 5.0 C (41.0 F) | n/a | n/a |
| Sep | 37.2 C (99.0 F) | -0.6 C (30.9 F) | n/a | n/a |
| Oct | 31.7 C (89.1 F) | -6.7 C (19.9 F) | n/a | n/a |
| Nov | 27.2 C (81.0 F) | -12.8 C (9.0 F) | n/a | n/a |
| Dec | 18.3 C (64.9 F) | -22.2 C (-8.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1935 | 34 |
| 1936 | 73 |
| 1937 | 43 |
| 1938 | 52 |
| 1939 | 31 |
| 1940 | 52 |
| 1941 | 49 |
| 1942 | 40 |
| 1943 | 45 |
| 1944 | 32 |
| 1945 | 65 |
| 1946 | 50 |
| 1947 | 45 |
| 1948 | 40 |
| 1949 | 44 |
| 1950 | 46 |
| 1951 | 42 |
| 1952 | 31 |
| 1953 | 34 |
| 1954 | 36 |
| 1955 | 45 |
| 1956 | 36 |
| 1957 | 37 |
| 1958 | 28 |
| 1959 | 46 |
| 1960 | 28 |
| 1961 | 29 |
| 1962 | 35 |
| 1963 | 35 |
| 1964 | 35 |
| 1965 | 36 |
| 1966 | 35 |
| 1967 | 30 |
| 1968 | 27 |
| 1969 | 26 |
| 1970 | 22 |
| 1971 | 21 |
| 1972 | 29 |
All-Time Record Progression
2 new records| Date | Kind | Detail |
|---|---|---|
| 1972-07-21 | Record high minimum temperature | Record high minimum temperature 25.6 C (78.1 F) |
| 2026-07-28 | Record daily precipitation | Record daily precipitation 97.5 mm (3.8 in) |
Wettest Day of Each Month
Jul: 97.5 mm (3.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 53.3 mm (2.1 in) | 23 January 1966 |
| Feb | 49.5 mm (1.9 in) | 16 February 1954 |
| Mar | 48.3 mm (1.9 in) | 31 March 1945 |
| Apr | 54.6 mm (2.1 in) | 3 April 2025 |
| May | 44.2 mm (1.7 in) | 24 May 2026 |
| Jun | 79.2 mm (3.1 in) | 19 June 2024 |
| Jul | 97.5 mm (3.8 in) | 28 July 2026 |
| Aug | 71.1 mm (2.8 in) | 10 August 1953 |
| Sep | 89.9 mm (3.5 in) | 18 September 1945 |
| Oct | 50.8 mm (2.0 in) | 1 October 1945 |
| Nov | 47.5 mm (1.9 in) | 10 November 1962 |
| Dec | 43.7 mm (1.7 in) | 28 December 1968 |
Period of Record Coverage
1935 to 1972| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1935 | 214 | 59% | No |
| 1936 | 354 | 97% | Yes |
| 1937 | 360 | 99% | Yes |
| 1938 | 363 | 99% | Yes |
| 1939 | 358 | 98% | Yes |
| 1940 | 364 | 99% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 363 | 99% | Yes |
| 1943 | 363 | 99% | Yes |
| 1944 | 365 | 100% | Yes |
| 1945 | 362 | 99% | Yes |
| 1946 | 362 | 99% | Yes |
| 1947 | 362 | 99% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 364 | 100% | Yes |
| 1951 | 362 | 99% | Yes |
| 1952 | 361 | 99% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 364 | 100% | Yes |
| 1955 | 362 | 99% | Yes |
| 1956 | 364 | 99% | Yes |
| 1957 | 358 | 98% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 362 | 99% | Yes |
| 1960 | 365 | 100% | Yes |
| 1961 | 346 | 95% | Yes |
| 1962 | 356 | 98% | Yes |
| 1963 | 362 | 99% | Yes |
| 1964 | 365 | 100% | Yes |
| 1965 | 357 | 98% | 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 | 332 | 91% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 28 July 2026 | Lewiston, US | all-time rain | 97.5 mm (3.8 in) | 7.6 mm (0.30 in) | 80 years | 60 of 100 (Major) |
| 22 July 2026 | Lewiston, US | daily rain | 60.2 mm (2.4 in) | 47.8 mm (1.9 in) | 83 years | 73 of 100 (Major) |
| 24 May 2026 | Lewiston, US | monthly rain | 44.2 mm (1.7 in) | 0.3 mm (0.01 in) | 89 years | 45 of 100 (Notable) |
| 1 April 2026 | Lewiston, US | daily rain | 23.9 mm (0.9 in) | 12.2 mm (0.5 in) | 64 years | 20 of 100 (Routine) |
| 23 March 2026 | Lewiston, US | daily rain | 10.2 mm (0.4 in) | 1.6 mm (0.06 in) | 60 years | 20 of 100 (Routine) |
| 6 March 2026 | Lewiston, US | daily rain | 13.5 mm (0.5 in) | 0.8 mm (0.03 in) | 83 years | 20 of 100 (Routine) |
| 26 January 2026 | Lewiston, US | daily snowfall | 19.1 cm (7.5 in) | 10.2 cm (4.0 in) | 76 years | 52 of 100 (Notable) |
| 22 January 2026 | Lewiston, US | daily snowfall | 10.4 cm (4.1 in) | 0.2 cm (0.1 in) | 90 years | 36 of 100 (Notable) |
| 20 January 2026 | Lewiston, US | daily snowfall | 27.9 cm (11.0 in) | 14.9 cm (5.9 in) | 0 years | 39 of 100 (Notable) |
| 7 January 2026 | Lewiston, US | daily rain | 19.6 mm (0.8 in) | 10.5 mm (0.4 in) | 64 years | 20 of 100 (Routine) |
| 29 December 2025 | Lewiston, US | daily rain | 31.2 mm (1.2 in) | 12.9 mm (0.5 in) | 84 years | 56 of 100 (Notable) |
| 12 November 2025 | Lewiston, US | daily snowfall | 0.3 cm (0.1 in) | 0.3 cm (0.1 in) | 90 years | 20 of 100 (Routine) |
| 11 November 2025 | Lewiston, US | daily snowfall | 8.1 cm (3.2 in) | 8.1 cm (3.2 in) | 90 years | 56 of 100 (Notable) |
| 10 November 2025 | Lewiston, US | daily snowfall | 5.1 cm (2.0 in) | 5.1 cm (2.0 in) | 90 years | 49 of 100 (Notable) |
| 31 October 2025 | Lewiston, US | daily rain | 25.1 mm (1.0 in) | 10.4 mm (0.4 in) | 79 years | 45 of 100 (Notable) |
| 20 October 2025 | Lewiston, US | daily rain | 20.8 mm (0.8 in) | 14.4 mm (0.6 in) | 56 years | 20 of 100 (Routine) |
| 8 October 2025 | Lewiston, US | daily rain | 39.4 mm (1.6 in) | 13.0 mm (0.5 in) | 76 years | 48 of 100 (Notable) |
| 31 July 2025 | Lewiston, US | daily rain | 16.5 mm (0.6 in) | 10.7 mm (0.4 in) | 64 years | 20 of 100 (Routine) |
| 1 July 2025 | Lewiston, US | daily rain | 13.0 mm (0.5 in) | 0.8 mm (0.03 in) | 71 years | 20 of 100 (Routine) |
| 23 May 2025 | Lewiston, US | daily rain | 21.8 mm (0.9 in) | 0.7 mm (0.03 in) | 88 years | 20 of 100 (Routine) |
Climate Trend
36 complete years, 1936 to 1971| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1936 | 9.0 C | -0.58 C |
| 1937 | 9.5 C | -0.08 C |
| 1938 | 9.9 C | +0.29 C |
| 1939 | 9.5 C | -0.11 C |
| 1940 | 8.3 C | -1.31 C |
| 1941 | 10.2 C | +0.60 C |
| 1942 | 9.5 C | -0.12 C |
| 1943 | 8.5 C | -1.08 C |
| 1944 | 9.5 C | -0.09 C |
| 1945 | 9.3 C | -0.36 C |
| 1946 | 10.3 C | +0.64 C |
| 1947 | 9.7 C | +0.04 C |
| 1948 | 9.7 C | +0.07 C |
| 1949 | 10.8 C | +1.20 C |
| 1950 | 9.1 C | -0.50 C |
| 1951 | 9.5 C | -0.08 C |
| 1952 | 10.4 C | +0.79 C |
| 1953 | 10.9 C | +1.32 C |
| 1954 | 9.8 C | +0.21 C |
| 1955 | 10.6 C | +0.96 C |
| 1956 | 9.3 C | -0.33 C |
| 1957 | 10.0 C | +0.38 C |
| 1958 | 9.1 C | -0.52 C |
| 1959 | 10.0 C | +0.43 C |
| 1960 | 8.9 C | -0.70 C |
| 1961 | 9.7 C | +0.10 C |
| 1962 | 9.5 C | -0.14 C |
| 1963 | 9.2 C | -0.38 C |
| 1964 | 10.0 C | +0.37 C |
| 1965 | 9.1 C | -0.48 C |
| 1966 | 9.6 C | -0.02 C |
| 1967 | 9.4 C | -0.26 C |
| 1968 | 9.5 C | -0.11 C |
| 1969 | 9.5 C | -0.14 C |
| 1970 | 9.6 C | +0.01 C |
| 1971 | 9.5 C | -0.07 C |
The fitted trend in annual mean temperature here over 1936 to 1971 is 0.02 C (-0.17 to 0.21) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.04 F (-0.30 to 0.37) 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 | 0.02 C (-0.17 to 0.21) per decade | 0.04 F (-0.30 to 0.37) per decade | 1936 to 1971 | 36 | Not clearly different from zero |
| Mean daily maximum | -0.19 C (-0.41 to 0.03) per decade | -0.35 F (-0.74 to 0.05) per decade | 1936 to 1971 | 36 | Not clearly different from zero |
| Mean daily minimum | 0.2 C (0.1 to 0.4) per decade | 0.4 F (0.1 to 0.7) per decade | 1936 to 1971 | 36 | Rise |
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
1935 to 2026| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.1 C (106.0 F) | 1936 | 34.7 C (94.5 F) | 38 |
| Coldest night (TNn) | -23.9 C (-11.0 F) | 1943 | -18.6 C (-1.5 F) | 38 |
| Wettest day (Rx1day) | 97.5 mm (3.8 in) | 2026 | 46.2 mm (1.8 in) | 41 |
| Wettest five days (Rx5day) | 144.8 mm (5.7 in) | 1945 | 65.9 mm (2.6 in) | 41 |
| Longest dry spell (CDD) | 30 days | 1969 | 16 days | 41 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1935 | 36.1 C (97.0 F) |
| 1936 | 41.1 C (106.0 F) |
| 1937 | 36.1 C (97.0 F) |
| 1938 | 34.4 C (93.9 F) |
| 1939 | 35.6 C (96.1 F) |
| 1940 | 33.9 C (93.0 F) |
| 1941 | 37.2 C (99.0 F) |
| 1942 | 34.4 C (93.9 F) |
| 1943 | 35.0 C (95.0 F) |
| 1944 | 35.6 C (96.1 F) |
| 1945 | 34.4 C (93.9 F) |
| 1946 | 35.0 C (95.0 F) |
| 1947 | 37.2 C (99.0 F) |
| 1948 | 38.3 C (100.9 F) |
| 1949 | 37.8 C (100.0 F) |
| 1950 | 32.8 C (91.0 F) |
| 1951 | 33.3 C (91.9 F) |
| 1952 | 35.6 C (96.1 F) |
| 1953 | 37.2 C (99.0 F) |
| 1954 | 33.9 C (93.0 F) |
| 1955 | 37.8 C (100.0 F) |
| 1956 | 34.4 C (93.9 F) |
| 1957 | 35.0 C (95.0 F) |
| 1958 | 33.3 C (91.9 F) |
| 1959 | 36.1 C (97.0 F) |
| 1960 | 32.8 C (91.0 F) |
| 1961 | 32.2 C (90.0 F) |
| 1962 | 33.9 C (93.0 F) |
| 1963 | 35.0 C (95.0 F) |
| 1964 | 34.4 C (93.9 F) |
| 1965 | 32.2 C (90.0 F) |
| 1966 | 35.6 C (96.1 F) |
| 1967 | 31.1 C (88.0 F) |
| 1968 | 32.8 C (91.0 F) |
| 1969 | 32.2 C (90.0 F) |
| 1970 | 30.6 C (87.1 F) |
| 1971 | 32.2 C (90.0 F) |
| 1972 | 35.6 C (96.1 F) |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1935 | -17.8 C (0.0 F) |
| 1936 | -22.8 C (-9.0 F) |
| 1937 | -12.8 C (9.0 F) |
| 1938 | -20.6 C (-5.1 F) |
| 1939 | -18.9 C (-2.0 F) |
| 1940 | -16.7 C (1.9 F) |
| 1941 | -16.7 C (1.9 F) |
| 1942 | -21.1 C (-6.0 F) |
| 1943 | -23.9 C (-11.0 F) |
| 1944 | -18.9 C (-2.0 F) |
| 1945 | -22.2 C (-8.0 F) |
| 1946 | -17.8 C (0.0 F) |
| 1947 | -15.6 C (3.9 F) |
| 1948 | -19.4 C (-2.9 F) |
| 1949 | -14.4 C (6.1 F) |
| 1950 | -20.0 C (-4.0 F) |
| 1951 | -17.8 C (0.0 F) |
| 1952 | -16.7 C (1.9 F) |
| 1953 | -12.8 C (9.0 F) |
| 1954 | -17.8 C (0.0 F) |
| 1955 | -17.2 C (1.0 F) |
| 1956 | -15.0 C (5.0 F) |
| 1957 | -22.8 C (-9.0 F) |
| 1958 | -18.9 C (-2.0 F) |
| 1959 | -17.8 C (0.0 F) |
| 1960 | -20.0 C (-4.0 F) |
| 1961 | -20.0 C (-4.0 F) |
| 1962 | -20.6 C (-5.1 F) |
| 1963 | -22.2 C (-8.0 F) |
| 1964 | -16.1 C (3.0 F) |
| 1965 | -17.8 C (0.0 F) |
| 1966 | -19.4 C (-2.9 F) |
| 1967 | -17.2 C (1.0 F) |
| 1968 | -18.9 C (-2.0 F) |
| 1969 | -17.2 C (1.0 F) |
| 1970 | -18.3 C (-0.9 F) |
| 1971 | -19.4 C (-2.9 F) |
| 1972 | -18.9 C (-2.0 F) |
| 2024 | n/a |
| 2025 | n/a |
| 2026 | n/a |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1935 | 24.1 mm (0.9 in) |
| 1936 | 41.4 mm (1.6 in) |
| 1937 | 43.9 mm (1.7 in) |
| 1938 | 45.2 mm (1.8 in) |
| 1939 | 29.2 mm (1.1 in) |
| 1940 | 44.7 mm (1.8 in) |
| 1941 | 30.5 mm (1.2 in) |
| 1942 | 50.5 mm (2.0 in) |
| 1943 | 46.2 mm (1.8 in) |
| 1944 | 30.5 mm (1.2 in) |
| 1945 | 89.9 mm (3.5 in) |
| 1946 | 46.2 mm (1.8 in) |
| 1947 | 54.9 mm (2.2 in) |
| 1948 | 51.3 mm (2.0 in) |
| 1949 | 33.5 mm (1.3 in) |
| 1950 | 54.6 mm (2.1 in) |
| 1951 | 44.7 mm (1.8 in) |
| 1952 | 43.7 mm (1.7 in) |
| 1953 | 71.1 mm (2.8 in) |
| 1954 | 55.1 mm (2.2 in) |
| 1955 | 38.9 mm (1.5 in) |
| 1956 | 49.5 mm (1.9 in) |
| 1957 | 43.4 mm (1.7 in) |
| 1958 | 36.3 mm (1.4 in) |
| 1959 | 33.5 mm (1.3 in) |
| 1960 | 25.9 mm (1.0 in) |
| 1961 | 49.0 mm (1.9 in) |
| 1962 | 59.2 mm (2.3 in) |
| 1963 | 46.5 mm (1.8 in) |
| 1964 | 72.4 mm (2.9 in) |
| 1965 | 46.2 mm (1.8 in) |
| 1966 | 53.3 mm (2.1 in) |
| 1967 | 46.2 mm (1.8 in) |
| 1968 | 71.6 mm (2.8 in) |
| 1969 | 29.2 mm (1.1 in) |
| 1970 | 36.1 mm (1.4 in) |
| 1971 | 39.6 mm (1.6 in) |
| 1972 | 39.6 mm (1.6 in) |
| 2024 | 79.2 mm (3.1 in) |
| 2025 | 54.6 mm (2.1 in) |
| 2026 | 97.5 mm (3.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1935 | 37.9 mm (1.5 in) |
| 1936 | 97.5 mm (3.8 in) |
| 1937 | 51.4 mm (2.0 in) |
| 1938 | 65.3 mm (2.6 in) |
| 1939 | 41.4 mm (1.6 in) |
| 1940 | 65.9 mm (2.6 in) |
| 1941 | 50.1 mm (2.0 in) |
| 1942 | 78.3 mm (3.1 in) |
| 1943 | 78.3 mm (3.1 in) |
| 1944 | 69.4 mm (2.7 in) |
| 1945 | 144.8 mm (5.7 in) |
| 1946 | 48.0 mm (1.9 in) |
| 1947 | 75.5 mm (3.0 in) |
| 1948 | 86.1 mm (3.4 in) |
| 1949 | 51.1 mm (2.0 in) |
| 1950 | 113.2 mm (4.5 in) |
| 1951 | 65.6 mm (2.6 in) |
| 1952 | 57.0 mm (2.2 in) |
| 1953 | 75.2 mm (3.0 in) |
| 1954 | 87.1 mm (3.4 in) |
| 1955 | 71.4 mm (2.8 in) |
| 1956 | 77.4 mm (3.0 in) |
| 1957 | 53.4 mm (2.1 in) |
| 1958 | 53.0 mm (2.1 in) |
| 1959 | 56.1 mm (2.2 in) |
| 1960 | 56.4 mm (2.2 in) |
| 1961 | 76.9 mm (3.0 in) |
| 1962 | 74.5 mm (2.9 in) |
| 1963 | 64.0 mm (2.5 in) |
| 1964 | 101.4 mm (4.0 in) |
| 1965 | 49.2 mm (1.9 in) |
| 1966 | 55.1 mm (2.2 in) |
| 1967 | 75.6 mm (3.0 in) |
| 1968 | 80.8 mm (3.2 in) |
| 1969 | 63.7 mm (2.5 in) |
| 1970 | 42.5 mm (1.7 in) |
| 1971 | 66.3 mm (2.6 in) |
| 1972 | 58.9 mm (2.3 in) |
| 2024 | 89.1 mm (3.5 in) |
| 2025 | 41.1 mm (1.6 in) |
| 2026 | 97.5 mm (3.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1935 | 15 days |
| 1936 | 24 days |
| 1937 | 14 days |
| 1938 | 14 days |
| 1939 | 20 days |
| 1940 | 14 days |
| 1941 | 19 days |
| 1942 | 15 days |
| 1943 | 20 days |
| 1944 | 14 days |
| 1945 | 16 days |
| 1946 | 14 days |
| 1947 | 17 days |
| 1948 | 20 days |
| 1949 | 18 days |
| 1950 | 14 days |
| 1951 | 11 days |
| 1952 | 18 days |
| 1953 | 14 days |
| 1954 | 13 days |
| 1955 | 23 days |
| 1956 | 15 days |
| 1957 | 23 days |
| 1958 | 19 days |
| 1959 | 12 days |
| 1960 | 16 days |
| 1961 | 22 days |
| 1962 | 18 days |
| 1963 | 28 days |
| 1964 | 16 days |
| 1965 | 17 days |
| 1966 | 13 days |
| 1967 | 16 days |
| 1968 | 25 days |
| 1969 | 30 days |
| 1970 | 14 days |
| 1971 | 24 days |
| 1972 | 12 days |
| 2024 | 17 days |
| 2025 | 13 days |
| 2026 | 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
36 years with a frostAcross 36 years with a frost, the median last spring frost at Lewiston falls on 3 May and the median first autumn frost on 17 October, which leaves a median of 164 days between them.
Fitted over all years, the growing season changes by +9.7 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1942 to 1971) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 3 May | n/a | 2 May | n/a | -3.4 days per decade |
| First autumn frost | 17 October | n/a | 18 October | n/a | +6.3 days per decade |
| Growing days | 164 days | n/a | 166 days | n/a | +9.7 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
38 years, 1936 to 2024A day with at least 44.8 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 95.0 mm (3.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 44.8 mm (1.8 in) | |
| 5 years | 57.4 mm (2.3 in) | |
| 10 years | 66.1 mm (2.6 in) | |
| 25 years | 77.5 mm (3.1 in) | |
| 50 years | 86.2 mm (3.4 in) | Longer than the 38 years of record |
| 100 years | 95.0 mm (3.7 in) | Longer than the 38 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, 38 years of values from 1936 to 2024.
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: 89.9 mm (3.5 in) in 1945; 79.2 mm (3.1 in) in 2024; 72.4 mm (2.9 in) in 1964.
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 (2026-10-12).