Somerset Main Street Weather Records (USC00368249)
Record envelope, standing records and threshold days for Somerset Main Street (USC00368249), Pennsylvania, United States, with 65 years of record.
Key Facts for Somerset Main Street
- Somerset Main Street (USC00368249) is a weather station in Pennsylvania, United States at 40.02 latitude and -79.08 longitude, 656 m (2,152 ft) above sea level.
- The station reports from 1894 to 1958, 65 years of record.
- 1,464 records set at Somerset Main Street still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Somerset Main Street set a daily record low minimum temperature of -17.8 C (0.0 F) on 30 November 1958.
About the Station
- Location: Pennsylvania, United States, 40.02 latitude, -79.08 longitude.
- Elevation: 656 m (2,152 ft).
- Period of record: 1894 to 1958, 65 years.
- Eligible elements: tmax, tmin, prcp, snow, 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 | 23.9 C (75.0 F) | -33.3 C (-27.9 F) | n/a | n/a |
| Feb | 23.3 C (73.9 F) | -33.9 C (-29.0 F) | n/a | n/a |
| Mar | 29.4 C (84.9 F) | -24.4 C (-11.9 F) | n/a | n/a |
| Apr | 32.2 C (90.0 F) | -19.4 C (-2.9 F) | n/a | n/a |
| May | 33.9 C (93.0 F) | -8.9 C (16.0 F) | n/a | n/a |
| Jun | 37.2 C (99.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Jul | 37.8 C (100.0 F) | 0.6 C (33.1 F) | n/a | n/a |
| Aug | 39.4 C (102.9 F) | -1.7 C (28.9 F) | n/a | n/a |
| Sep | 36.7 C (98.1 F) | -5.6 C (21.9 F) | n/a | n/a |
| Oct | 33.3 C (91.9 F) | -12.8 C (9.0 F) | n/a | n/a |
| Nov | 25.6 C (78.1 F) | -26.1 C (-15.0 F) | n/a | n/a |
| Dec | 22.2 C (72.0 F) | -31.7 C (-25.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1894 | 41 |
| 1895 | 40 |
| 1896 | 30 |
| 1897 | 13 |
| 1898 | 25 |
| 1899 | 29 |
| 1900 | 32 |
| 1901 | 20 |
| 1902 | 13 |
| 1903 | 26 |
| 1904 | 16 |
| 1905 | 22 |
| 1906 | 19 |
| 1907 | 21 |
| 1908 | 27 |
| 1909 | 20 |
| 1910 | 20 |
| 1911 | 35 |
| 1912 | 16 |
| 1913 | 25 |
| 1914 | 37 |
| 1915 | 13 |
| 1916 | 23 |
| 1917 | 26 |
| 1918 | 27 |
| 1919 | 17 |
| 1920 | 11 |
| 1921 | 22 |
| 1922 | 19 |
| 1923 | 21 |
| 1924 | 19 |
| 1925 | 40 |
| 1926 | 20 |
| 1927 | 46 |
| 1928 | 18 |
| 1929 | 16 |
| 1930 | 42 |
| 1931 | 21 |
| 1932 | 38 |
| 1933 | 24 |
| 1934 | 27 |
| 1935 | 25 |
| 1936 | 37 |
| 1937 | 23 |
| 1938 | 26 |
| 1939 | 13 |
| 1940 | 24 |
| 1941 | 16 |
| 1942 | 16 |
| 1943 | 27 |
| 1944 | 12 |
| 1945 | 17 |
| 1946 | 17 |
| 1947 | 21 |
| 1948 | 18 |
| 1949 | 15 |
| 1950 | 27 |
| 1951 | 20 |
| 1952 | 18 |
| 1953 | 14 |
| 1954 | 15 |
| 1955 | 15 |
| 1956 | 16 |
| 1957 | 9 |
| 1958 | 6 |
All-Time Record Progression
2 new records| Date | Kind | Detail |
|---|---|---|
| 1926-08-10 | Record high maximum temperature | Record high maximum temperature 39.4 C (102.9 F) |
| 1934-02-28 | Record low minimum temperature | Record low minimum temperature -33.9 C (-29.0 F) |
Wettest Day of Each Month
Apr: 151.1 mm (5.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 53.3 mm (2.1 in) | 10 January 1915 |
| Feb | 47.0 mm (1.9 in) | 16 February 1914 |
| Mar | 90.2 mm (3.6 in) | 17 March 1936 |
| Apr | 151.1 mm (5.9 in) | 29 April 1894 |
| May | 97.8 mm (3.9 in) | 18 May 1894 |
| Jun | 71.1 mm (2.8 in) | 10 June 1930 |
| Jul | 91.4 mm (3.6 in) | 13 July 1934 |
| Aug | 113.0 mm (4.4 in) | 10 August 1905 |
| Sep | 82.6 mm (3.3 in) | 15 September 1911 |
| Oct | 100.3 mm (3.9 in) | 15 October 1954 |
| Nov | 76.2 mm (3.0 in) | 17 November 1920 |
| Dec | 57.9 mm (2.3 in) | 28 December 1923 |
Period of Record Coverage
1894 to 1958| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1894 | 322 | 88% | No |
| 1895 | 358 | 98% | Yes |
| 1896 | 362 | 99% | Yes |
| 1897 | 362 | 99% | Yes |
| 1898 | 364 | 100% | Yes |
| 1899 | 364 | 100% | Yes |
| 1900 | 361 | 99% | Yes |
| 1901 | 295 | 81% | No |
| 1902 | 360 | 99% | Yes |
| 1903 | 362 | 99% | Yes |
| 1904 | 358 | 98% | Yes |
| 1905 | 361 | 99% | Yes |
| 1906 | 352 | 96% | Yes |
| 1907 | 359 | 98% | Yes |
| 1908 | 366 | 100% | Yes |
| 1909 | 363 | 99% | Yes |
| 1910 | 358 | 98% | Yes |
| 1911 | 359 | 98% | Yes |
| 1912 | 364 | 99% | Yes |
| 1913 | 362 | 99% | Yes |
| 1914 | 357 | 98% | Yes |
| 1915 | 362 | 99% | Yes |
| 1916 | 363 | 99% | Yes |
| 1917 | 360 | 99% | Yes |
| 1918 | 331 | 91% | Yes |
| 1919 | 325 | 89% | No |
| 1920 | 354 | 97% | Yes |
| 1921 | 363 | 99% | Yes |
| 1922 | 360 | 99% | Yes |
| 1923 | 361 | 99% | Yes |
| 1924 | 281 | 77% | No |
| 1925 | 258 | 71% | No |
| 1926 | 131 | 36% | No |
| 1927 | 364 | 100% | Yes |
| 1928 | 363 | 99% | Yes |
| 1929 | 180 | 49% | No |
| 1930 | 364 | 100% | Yes |
| 1931 | 364 | 100% | Yes |
| 1932 | 366 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 364 | 100% | Yes |
| 1938 | 363 | 99% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 365 | 100% | Yes |
| 1944 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 364 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 366 | 100% | Yes |
| 1949 | 364 | 100% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 365 | 100% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 301 | 82% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 30 November 1958 | Somerset Main Street, US | daily low min | -17.8 C (0.0 F) | 3.9 C (7.0 F) | 11 years | 16 of 100 (Routine) |
| 18 November 1958 | Somerset Main Street, US | daily high max | 24.4 C (75.9 F) | 3.3 C (5.9 F) | 20 years | 16 of 100 (Routine) |
| 17 November 1958 | Somerset Main Street, US | daily high min | 11.7 C (53.1 F) | 3.4 C (6.1 F) | 61 years | 30 of 100 (Routine) |
| 16 November 1958 | Somerset Main Street, US | daily high min (Tie) | 12.2 C (54.0 F) | tie | 29 years | 3 of 100 (Routine) |
| 15 November 1958 | Somerset Main Street, US | daily high min | 8.3 C (46.9 F) | 1.1 C (2.0 F) | 32 years | 17 of 100 (Routine) |
| 26 September 1958 | Somerset Main Street, US | daily high min | 20.0 C (68.0 F) | 1.1 C (2.0 F) | 49 years | 22 of 100 (Routine) |
| 17 September 1958 | Somerset Main Street, US | daily high min (Tie) | 18.3 C (64.9 F) | tie | 27 years | 3 of 100 (Routine) |
| 21 July 1958 | Somerset Main Street, US | daily low max (Tie) | 18.3 C (64.9 F) | tie | 19 years | 2 of 100 (Routine) |
| 20 June 1958 | Somerset Main Street, US | daily rain | 44.5 mm (1.8 in) | 25.4 mm (1.0 in) | 55 years | 44 of 100 (Notable) |
| 7 May 1958 | Somerset Main Street, US | daily low max | 6.1 C (43.0 F) | 2.8 C (5.0 F) | 13 years | 15 of 100 (Routine) |
| 6 May 1958 | Somerset Main Street, US | daily low max (Tie) | 7.2 C (45.0 F) | tie | 49 years | 5 of 100 (Routine) |
| 3 May 1958 | Somerset Main Street, US | daily rain | 39.9 mm (1.6 in) | 17.5 mm (0.7 in) | 9 years | 26 of 100 (Routine) |
| 27 April 1958 | Somerset Main Street, US | daily rain | 24.1 mm (0.9 in) | 5.0 mm (0.20 in) | 4 years | 11 of 100 (Routine) |
| 25 March 1958 | Somerset Main Street, US | daily snow depth | 10.2 cm (4.0 in) | 2.6 cm (1.0 in) | 24 years | 15 of 100 (Routine) |
| 24 March 1958 | Somerset Main Street, US | daily snow depth (Tie) | 12.7 cm (5.0 in) | tie | 17 years | 2 of 100 (Routine) |
| 22 March 1958 | Somerset Main Street, US | daily snow depth | 17.8 cm (7.0 in) | 7.6 cm (3.0 in) | 29 years | 20 of 100 (Routine) |
| 21 March 1958 | Somerset Main Street, US | daily snow depth | 22.9 cm (9.0 in) | 5.1 cm (2.0 in) | 29 years | 18 of 100 (Routine) |
| 14 March 1958 | Somerset Main Street, US | daily snowfall | 25.4 cm (10.0 in) | 12.4 cm (4.9 in) | 20 years | 31 of 100 (Routine) |
| 20 February 1958 | Somerset Main Street, US | daily snow depth (Tie) | 40.6 cm (16.0 in) | tie | 36 years | 4 of 100 (Routine) |
| 19 February 1958 | Somerset Main Street, US | daily snow depth | 45.7 cm (18.0 in) | 17.8 cm (7.0 in) | 22 years | 28 of 100 (Routine) |
Climate Trend
56 complete years, 1895 to 1957| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1895 | 8.4 C | -0.38 C |
| 1896 | 9.0 C | +0.25 C |
| 1897 | 8.6 C | -0.11 C |
| 1898 | 9.1 C | +0.32 C |
| 1899 | 8.6 C | -0.15 C |
| 1900 | 8.8 C | +0.07 C |
| 1902 | 8.2 C | -0.53 C |
| 1903 | 8.6 C | -0.18 C |
| 1904 | 7.5 C | -1.26 C |
| 1905 | 7.9 C | -0.87 C |
| 1906 | 8.6 C | -0.12 C |
| 1907 | 7.8 C | -0.91 C |
| 1908 | 9.4 C | +0.62 C |
| 1909 | 9.2 C | +0.41 C |
| 1910 | 9.0 C | +0.25 C |
| 1911 | 9.7 C | +0.91 C |
| 1912 | 8.2 C | -0.57 C |
| 1913 | 9.6 C | +0.88 C |
| 1914 | 8.4 C | -0.33 C |
| 1915 | 8.4 C | -0.34 C |
| 1916 | 8.4 C | -0.31 C |
| 1917 | 7.0 C | -1.76 C |
| 1920 | 8.3 C | -0.43 C |
| 1921 | 11.0 C | +2.21 C |
| 1922 | 10.1 C | +1.31 C |
| 1923 | 9.1 C | +0.35 C |
| 1927 | 9.0 C | +0.26 C |
| 1928 | 8.6 C | -0.15 C |
| 1930 | 8.2 C | -0.55 C |
| 1931 | 9.5 C | +0.77 C |
| 1932 | 8.9 C | +0.11 C |
| 1933 | 9.0 C | +0.27 C |
| 1934 | 8.3 C | -0.44 C |
| 1935 | 8.1 C | -0.63 C |
| 1936 | 7.9 C | -0.86 C |
| 1937 | 7.6 C | -1.18 C |
| 1938 | 8.4 C | -0.32 C |
| 1939 | 8.9 C | +0.18 C |
| 1940 | 7.1 C | -1.64 C |
| 1941 | 8.3 C | -0.43 C |
| 1942 | 8.7 C | -0.10 C |
| 1943 | 8.6 C | -0.16 C |
| 1944 | 9.0 C | +0.21 C |
| 1945 | 8.9 C | +0.10 C |
| 1946 | 9.4 C | +0.66 C |
| 1947 | 8.3 C | -0.45 C |
| 1948 | 9.0 C | +0.22 C |
| 1949 | 10.0 C | +1.23 C |
| 1950 | 8.5 C | -0.21 C |
| 1951 | 8.8 C | +0.05 C |
| 1952 | 9.2 C | +0.43 C |
| 1953 | 9.7 C | +0.98 C |
| 1954 | 9.2 C | +0.44 C |
| 1955 | 9.1 C | +0.38 C |
| 1956 | 9.3 C | +0.54 C |
| 1957 | 9.6 C | +0.83 C |
The fitted trend in annual mean temperature here over 1895 to 1957 is 0.07 C (-0.03 to 0.17) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.3) per decade. The slope is a straight line fitted to 56 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.07 C (-0.03 to 0.17) per decade | 0.1 F (-0.1 to 0.3) per decade | 1895 to 1957 | 56 | Not clearly different from zero |
| Mean daily maximum | 0.10 C (-0.02 to 0.22) per decade | 0.17 F (-0.04 to 0.39) per decade | 1895 to 1957 | 56 | Not clearly different from zero |
| Mean daily minimum | 0.04 C (-0.07 to 0.15) per decade | 0.1 F (-0.1 to 0.3) per decade | 1895 to 1957 | 56 | 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
1894 to 1958| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 39.4 C (102.9 F) | 1926 | 33.9 C (93.0 F) | 65 |
| Coldest night (TNn) | -33.9 C (-29.0 F) | 1934 | -25.0 C (-13.0 F) | 65 |
| Wettest day (Rx1day) | 151.1 mm (5.9 in) | 1894 | 52.6 mm (2.1 in) | 65 |
| Wettest five days (Rx5day) | 227.4 mm (9.0 in) | 1894 | 87.9 mm (3.5 in) | 65 |
| Longest dry spell (CDD) | 34 days | 1953 | 14 days | 65 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1894 | 36.1 C (97.0 F) |
| 1895 | 36.7 C (98.1 F) |
| 1896 | 34.4 C (93.9 F) |
| 1897 | 35.0 C (95.0 F) |
| 1898 | 35.6 C (96.1 F) |
| 1899 | 33.9 C (93.0 F) |
| 1900 | 35.6 C (96.1 F) |
| 1901 | 37.2 C (99.0 F) |
| 1902 | 32.2 C (90.0 F) |
| 1903 | 31.7 C (89.1 F) |
| 1904 | 31.7 C (89.1 F) |
| 1905 | 31.7 C (89.1 F) |
| 1906 | 31.7 C (89.1 F) |
| 1907 | 30.6 C (87.1 F) |
| 1908 | 35.6 C (96.1 F) |
| 1909 | 35.0 C (95.0 F) |
| 1910 | 34.4 C (93.9 F) |
| 1911 | 36.1 C (97.0 F) |
| 1912 | 32.8 C (91.0 F) |
| 1913 | 35.0 C (95.0 F) |
| 1914 | 36.1 C (97.0 F) |
| 1915 | 33.9 C (93.0 F) |
| 1916 | 34.4 C (93.9 F) |
| 1917 | 34.4 C (93.9 F) |
| 1918 | 38.9 C (102.0 F) |
| 1919 | 37.8 C (100.0 F) |
| 1920 | 30.0 C (86.0 F) |
| 1921 | 34.4 C (93.9 F) |
| 1922 | 36.7 C (98.1 F) |
| 1923 | 34.4 C (93.9 F) |
| 1924 | 35.0 C (95.0 F) |
| 1925 | 37.2 C (99.0 F) |
| 1926 | 39.4 C (102.9 F) |
| 1927 | 31.7 C (89.1 F) |
| 1928 | 31.7 C (89.1 F) |
| 1929 | 31.7 C (89.1 F) |
| 1930 | 35.0 C (95.0 F) |
| 1931 | 34.4 C (93.9 F) |
| 1932 | 33.9 C (93.0 F) |
| 1933 | 35.0 C (95.0 F) |
| 1934 | 35.0 C (95.0 F) |
| 1935 | 31.7 C (89.1 F) |
| 1936 | 37.2 C (99.0 F) |
| 1937 | 30.6 C (87.1 F) |
| 1938 | 30.6 C (87.1 F) |
| 1939 | 32.2 C (90.0 F) |
| 1940 | 32.2 C (90.0 F) |
| 1941 | 33.9 C (93.0 F) |
| 1942 | 31.7 C (89.1 F) |
| 1943 | 32.8 C (91.0 F) |
| 1944 | 34.4 C (93.9 F) |
| 1945 | 31.7 C (89.1 F) |
| 1946 | 31.7 C (89.1 F) |
| 1947 | 32.8 C (91.0 F) |
| 1948 | 36.1 C (97.0 F) |
| 1949 | 33.3 C (91.9 F) |
| 1950 | 32.2 C (90.0 F) |
| 1951 | 32.2 C (90.0 F) |
| 1952 | 33.9 C (93.0 F) |
| 1953 | 35.6 C (96.1 F) |
| 1954 | 34.4 C (93.9 F) |
| 1955 | 33.3 C (91.9 F) |
| 1956 | 32.2 C (90.0 F) |
| 1957 | 32.2 C (90.0 F) |
| 1958 | 30.0 C (86.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1894 | -25.0 C (-13.0 F) |
| 1895 | -26.7 C (-16.1 F) |
| 1896 | -23.9 C (-11.0 F) |
| 1897 | -24.4 C (-11.9 F) |
| 1898 | -22.2 C (-8.0 F) |
| 1899 | -31.1 C (-24.0 F) |
| 1900 | -25.6 C (-14.1 F) |
| 1901 | -24.4 C (-11.9 F) |
| 1902 | -26.7 C (-16.1 F) |
| 1903 | -24.4 C (-11.9 F) |
| 1904 | -28.9 C (-20.0 F) |
| 1905 | -27.8 C (-18.0 F) |
| 1906 | -22.2 C (-8.0 F) |
| 1907 | -27.8 C (-18.0 F) |
| 1908 | -25.0 C (-13.0 F) |
| 1909 | -20.6 C (-5.1 F) |
| 1910 | -23.3 C (-9.9 F) |
| 1911 | -18.9 C (-2.0 F) |
| 1912 | -31.7 C (-25.1 F) |
| 1913 | -18.3 C (-0.9 F) |
| 1914 | -28.9 C (-20.0 F) |
| 1915 | -20.0 C (-4.0 F) |
| 1916 | -25.6 C (-14.1 F) |
| 1917 | -28.9 C (-20.0 F) |
| 1918 | -28.9 C (-20.0 F) |
| 1919 | -24.4 C (-11.9 F) |
| 1920 | -20.6 C (-5.1 F) |
| 1921 | -20.6 C (-5.1 F) |
| 1922 | -23.3 C (-9.9 F) |
| 1923 | -20.0 C (-4.0 F) |
| 1924 | -23.3 C (-9.9 F) |
| 1925 | -26.7 C (-16.1 F) |
| 1926 | -26.7 C (-16.1 F) |
| 1927 | -23.3 C (-9.9 F) |
| 1928 | -21.7 C (-7.1 F) |
| 1929 | -23.9 C (-11.0 F) |
| 1930 | -26.1 C (-15.0 F) |
| 1931 | -20.6 C (-5.1 F) |
| 1932 | -24.4 C (-11.9 F) |
| 1933 | -26.7 C (-16.1 F) |
| 1934 | -33.9 C (-29.0 F) |
| 1935 | -28.3 C (-18.9 F) |
| 1936 | -33.3 C (-27.9 F) |
| 1937 | -25.6 C (-14.1 F) |
| 1938 | -25.0 C (-13.0 F) |
| 1939 | -26.7 C (-16.1 F) |
| 1940 | -26.7 C (-16.1 F) |
| 1941 | -23.3 C (-9.9 F) |
| 1942 | -33.3 C (-27.9 F) |
| 1943 | -27.8 C (-18.0 F) |
| 1944 | -28.9 C (-20.0 F) |
| 1945 | -26.1 C (-15.0 F) |
| 1946 | -27.8 C (-18.0 F) |
| 1947 | -22.2 C (-8.0 F) |
| 1948 | -31.1 C (-24.0 F) |
| 1949 | -21.1 C (-6.0 F) |
| 1950 | -28.9 C (-20.0 F) |
| 1951 | -27.8 C (-18.0 F) |
| 1952 | -18.9 C (-2.0 F) |
| 1953 | -15.0 C (5.0 F) |
| 1954 | -25.6 C (-14.1 F) |
| 1955 | -28.3 C (-18.9 F) |
| 1956 | -18.3 C (-0.9 F) |
| 1957 | -23.3 C (-9.9 F) |
| 1958 | -19.4 C (-2.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1894 | 151.1 mm (5.9 in) |
| 1895 | 33.0 mm (1.3 in) |
| 1896 | 78.7 mm (3.1 in) |
| 1897 | 47.0 mm (1.9 in) |
| 1898 | 38.1 mm (1.5 in) |
| 1899 | 69.3 mm (2.7 in) |
| 1900 | 58.4 mm (2.3 in) |
| 1901 | 44.5 mm (1.8 in) |
| 1902 | 80.0 mm (3.1 in) |
| 1903 | 47.0 mm (1.9 in) |
| 1904 | 53.3 mm (2.1 in) |
| 1905 | 113.0 mm (4.4 in) |
| 1906 | 78.7 mm (3.1 in) |
| 1907 | 50.0 mm (2.0 in) |
| 1908 | 50.0 mm (2.0 in) |
| 1909 | 47.0 mm (1.9 in) |
| 1910 | 59.7 mm (2.4 in) |
| 1911 | 82.6 mm (3.3 in) |
| 1912 | 67.3 mm (2.6 in) |
| 1913 | 78.7 mm (3.1 in) |
| 1914 | 50.8 mm (2.0 in) |
| 1915 | 63.5 mm (2.5 in) |
| 1916 | 68.6 mm (2.7 in) |
| 1917 | 50.8 mm (2.0 in) |
| 1918 | 38.1 mm (1.5 in) |
| 1919 | 71.1 mm (2.8 in) |
| 1920 | 76.2 mm (3.0 in) |
| 1921 | 57.4 mm (2.3 in) |
| 1922 | 53.3 mm (2.1 in) |
| 1923 | 63.5 mm (2.5 in) |
| 1924 | 50.8 mm (2.0 in) |
| 1925 | 69.9 mm (2.8 in) |
| 1926 | 50.8 mm (2.0 in) |
| 1927 | 52.1 mm (2.1 in) |
| 1928 | 103.6 mm (4.1 in) |
| 1929 | 31.8 mm (1.3 in) |
| 1930 | 71.1 mm (2.8 in) |
| 1931 | 41.1 mm (1.6 in) |
| 1932 | 32.5 mm (1.3 in) |
| 1933 | 38.6 mm (1.5 in) |
| 1934 | 91.4 mm (3.6 in) |
| 1935 | 47.8 mm (1.9 in) |
| 1936 | 90.2 mm (3.6 in) |
| 1937 | 75.7 mm (3.0 in) |
| 1938 | 34.3 mm (1.4 in) |
| 1939 | 37.8 mm (1.5 in) |
| 1940 | 41.9 mm (1.6 in) |
| 1941 | 67.3 mm (2.6 in) |
| 1942 | 50.8 mm (2.0 in) |
| 1943 | 43.9 mm (1.7 in) |
| 1944 | 53.8 mm (2.1 in) |
| 1945 | 53.8 mm (2.1 in) |
| 1946 | 60.7 mm (2.4 in) |
| 1947 | 63.8 mm (2.5 in) |
| 1948 | 45.0 mm (1.8 in) |
| 1949 | 48.5 mm (1.9 in) |
| 1950 | 38.1 mm (1.5 in) |
| 1951 | 47.5 mm (1.9 in) |
| 1952 | 47.2 mm (1.9 in) |
| 1953 | 52.6 mm (2.1 in) |
| 1954 | 100.3 mm (3.9 in) |
| 1955 | 65.0 mm (2.6 in) |
| 1956 | 50.8 mm (2.0 in) |
| 1957 | 41.9 mm (1.6 in) |
| 1958 | 44.5 mm (1.8 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1894 | 227.4 mm (9.0 in) |
| 1895 | 67.5 mm (2.7 in) |
| 1896 | 91.5 mm (3.6 in) |
| 1897 | 67.9 mm (2.7 in) |
| 1898 | 67.4 mm (2.7 in) |
| 1899 | 117.7 mm (4.6 in) |
| 1900 | 104.2 mm (4.1 in) |
| 1901 | 82.7 mm (3.3 in) |
| 1902 | 103.9 mm (4.1 in) |
| 1903 | 68.7 mm (2.7 in) |
| 1904 | 56.5 mm (2.2 in) |
| 1905 | 137.4 mm (5.4 in) |
| 1906 | 127.2 mm (5.0 in) |
| 1907 | 113.6 mm (4.5 in) |
| 1908 | 86.3 mm (3.4 in) |
| 1909 | 91.7 mm (3.6 in) |
| 1910 | 97.8 mm (3.9 in) |
| 1911 | 99.4 mm (3.9 in) |
| 1912 | 114.1 mm (4.5 in) |
| 1913 | 69.1 mm (2.7 in) |
| 1914 | 79.8 mm (3.1 in) |
| 1915 | 104.4 mm (4.1 in) |
| 1916 | 80.1 mm (3.2 in) |
| 1917 | 107.9 mm (4.2 in) |
| 1918 | 108.2 mm (4.3 in) |
| 1919 | 145.2 mm (5.7 in) |
| 1920 | 115.8 mm (4.6 in) |
| 1921 | 123.2 mm (4.9 in) |
| 1922 | 67.6 mm (2.7 in) |
| 1923 | 109.0 mm (4.3 in) |
| 1924 | 85.9 mm (3.4 in) |
| 1925 | 80.7 mm (3.2 in) |
| 1926 | 105.4 mm (4.1 in) |
| 1927 | 93.8 mm (3.7 in) |
| 1928 | 126.4 mm (5.0 in) |
| 1929 | 54.6 mm (2.1 in) |
| 1930 | 76.6 mm (3.0 in) |
| 1931 | 66.5 mm (2.6 in) |
| 1932 | 59.5 mm (2.3 in) |
| 1933 | 75.7 mm (3.0 in) |
| 1934 | 132.3 mm (5.2 in) |
| 1935 | 74.7 mm (2.9 in) |
| 1936 | 141.5 mm (5.6 in) |
| 1937 | 115.3 mm (4.5 in) |
| 1938 | 64.5 mm (2.5 in) |
| 1939 | 76.9 mm (3.0 in) |
| 1940 | 64.8 mm (2.6 in) |
| 1941 | 133.6 mm (5.3 in) |
| 1942 | 76.6 mm (3.0 in) |
| 1943 | 96.6 mm (3.8 in) |
| 1944 | 78.7 mm (3.1 in) |
| 1945 | 75.4 mm (3.0 in) |
| 1946 | 66.6 mm (2.6 in) |
| 1947 | 120.2 mm (4.7 in) |
| 1948 | 111.2 mm (4.4 in) |
| 1949 | 65.6 mm (2.6 in) |
| 1950 | 62.5 mm (2.5 in) |
| 1951 | 101.9 mm (4.0 in) |
| 1952 | 79.3 mm (3.1 in) |
| 1953 | 77.7 mm (3.1 in) |
| 1954 | 118.1 mm (4.6 in) |
| 1955 | 87.9 mm (3.5 in) |
| 1956 | 73.1 mm (2.9 in) |
| 1957 | 55.7 mm (2.2 in) |
| 1958 | 108.6 mm (4.3 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1894 | 19 days |
| 1895 | 29 days |
| 1896 | 13 days |
| 1897 | 26 days |
| 1898 | 14 days |
| 1899 | 19 days |
| 1900 | 29 days |
| 1901 | 24 days |
| 1902 | 15 days |
| 1903 | 18 days |
| 1904 | 14 days |
| 1905 | 19 days |
| 1906 | 16 days |
| 1907 | 8 days |
| 1908 | 25 days |
| 1909 | 18 days |
| 1910 | 25 days |
| 1911 | 9 days |
| 1912 | 12 days |
| 1913 | 14 days |
| 1914 | 15 days |
| 1915 | 12 days |
| 1916 | 17 days |
| 1917 | 18 days |
| 1918 | 12 days |
| 1919 | 15 days |
| 1920 | 25 days |
| 1921 | 13 days |
| 1922 | 24 days |
| 1923 | 19 days |
| 1924 | 26 days |
| 1925 | 10 days |
| 1926 | 8 days |
| 1927 | 13 days |
| 1928 | 13 days |
| 1929 | 9 days |
| 1930 | 19 days |
| 1931 | 10 days |
| 1932 | 28 days |
| 1933 | 11 days |
| 1934 | 19 days |
| 1935 | 12 days |
| 1936 | 12 days |
| 1937 | 13 days |
| 1938 | 12 days |
| 1939 | 14 days |
| 1940 | 14 days |
| 1941 | 19 days |
| 1942 | 17 days |
| 1943 | 14 days |
| 1944 | 16 days |
| 1945 | 10 days |
| 1946 | 12 days |
| 1947 | 17 days |
| 1948 | 11 days |
| 1949 | 14 days |
| 1950 | 13 days |
| 1951 | 16 days |
| 1952 | 17 days |
| 1953 | 34 days |
| 1954 | 13 days |
| 1955 | 11 days |
| 1956 | 14 days |
| 1957 | 21 days |
| 1958 | 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
56 years with a frostAcross 56 years with a frost, the median last spring frost at Somerset Main Street falls on 22 May and the median first autumn frost on 24 September, which leaves a median of 125 days between them.
Fitted over all years, the growing season changes by -1.2 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1927 to 1957) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 22 May | n/a | 25 May | n/a | +0.7 days per decade |
| First autumn frost | 24 September | n/a | 24 September | n/a | -0.6 days per decade |
| Growing days | 125 days | n/a | 122 days | n/a | -1.2 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
57 years, 1895 to 1957A day with at least 54.2 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 125.4 mm (4.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 54.2 mm (2.1 in) | |
| 5 years | 70.7 mm (2.8 in) | |
| 10 years | 82.6 mm (3.3 in) | |
| 25 years | 98.8 mm (3.9 in) | |
| 50 years | 111.7 mm (4.4 in) | |
| 100 years | 125.4 mm (4.9 in) | Longer than the 57 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, 57 years of values from 1895 to 1957.
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: 113.0 mm (4.4 in) in 1905; 103.6 mm (4.1 in) in 1928; 100.3 mm (3.9 in) in 1954.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Somerset Main Street, at 1930. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1930 ran 0.3 C (0.5 F) lower than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1930 | -0.3 | -0.5 | possible | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
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).