Wellsboro Weather Records (USC00369407)
Record envelope, standing records and threshold days for Wellsboro (USC00369407), Pennsylvania, United States, with 107 years of record.
Key Facts for Wellsboro
- Wellsboro (USC00369407) is a weather station in Pennsylvania, United States at 41.74 latitude and -77.31 longitude, 421 m (1,380 ft) above sea level.
- The station reports from 1893 to 1999, 107 years of record.
- 1,464 records set at Wellsboro still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Wellsboro set a daily record low minimum temperature of -6.7 C (19.9 F) on 26 April 1999.
About the Station
- Location: Pennsylvania, United States, 41.74 latitude, -77.31 longitude.
- Elevation: 421 m (1,380 ft).
- Period of record: 1893 to 1999, 107 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) | -32.8 C (-27.0 F) | n/a | n/a |
| Feb | 17.2 C (63.0 F) | -31.7 C (-25.1 F) | n/a | n/a |
| Mar | 28.3 C (82.9 F) | -31.7 C (-25.1 F) | n/a | n/a |
| Apr | 32.8 C (91.0 F) | -17.8 C (0.0 F) | n/a | n/a |
| May | 35.0 C (95.0 F) | -6.1 C (21.0 F) | n/a | n/a |
| Jun | 36.7 C (98.1 F) | -5.0 C (23.0 F) | n/a | n/a |
| Jul | 38.3 C (100.9 F) | 1.7 C (35.1 F) | n/a | n/a |
| Aug | 37.8 C (100.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Sep | 33.9 C (93.0 F) | -3.9 C (25.0 F) | n/a | n/a |
| Oct | 35.0 C (95.0 F) | -11.1 C (12.0 F) | n/a | n/a |
| Nov | 24.4 C (75.9 F) | -18.9 C (-2.0 F) | n/a | n/a |
| Dec | 20.0 C (68.0 F) | -33.3 C (-27.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1893 | 45 |
| 1894 | 57 |
| 1895 | 62 |
| 1896 | 72 |
| 1897 | 33 |
| 1898 | 45 |
| 1899 | 41 |
| 1900 | 35 |
| 1901 | 34 |
| 1902 | 34 |
| 1903 | 41 |
| 1904 | 13 |
| 1905 | 24 |
| 1906 | 48 |
| 1907 | 29 |
| 1908 | 39 |
| 1909 | 36 |
| 1910 | 30 |
| 1911 | 36 |
| 1912 | 31 |
| 1913 | 22 |
| 1914 | 40 |
| 1915 | 18 |
| 1916 | 27 |
| 1917 | 46 |
| 1918 | 40 |
| 1919 | 25 |
| 1920 | 38 |
| 1921 | 15 |
| 1922 | 22 |
| 1923 | 31 |
| 1924 | 31 |
| 1925 | 38 |
| 1926 | 28 |
| 1927 | 40 |
| 1928 | 28 |
| 1929 | 46 |
| 1948 | 19 |
| 1949 | 35 |
| 1950 | 34 |
| 1997 | 12 |
| 1998 | 37 |
| 1999 | 7 |
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 1950-08-19 | Record daily precipitation | Record daily precipitation 132.8 mm (5.2 in) |
Wettest Day of Each Month
Aug: 132.8 mm (5.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 55.9 mm (2.2 in) | 12 January 1915 |
| Feb | 74.7 mm (2.9 in) | 6 February 1896 |
| Mar | 53.3 mm (2.1 in) | 23 March 1903 |
| Apr | 63.5 mm (2.5 in) | 24 April 1898 |
| May | 79.5 mm (3.1 in) | 19 May 1894 |
| Jun | 60.2 mm (2.4 in) | 3 June 1916 |
| Jul | 75.7 mm (3.0 in) | 22 July 1919 |
| Aug | 132.8 mm (5.2 in) | 19 August 1950 |
| Sep | 63.5 mm (2.5 in) | 19 September 1894 |
| Oct | 73.7 mm (2.9 in) | 13 October 1896 |
| Nov | 66.0 mm (2.6 in) | 26 November 1900 |
| Dec | 54.6 mm (2.1 in) | 26 December 1895 |
Period of Record Coverage
1893 to 1999| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1893 | 259 | 71% | No |
| 1894 | 352 | 96% | Yes |
| 1895 | 350 | 96% | Yes |
| 1896 | 356 | 97% | Yes |
| 1897 | 362 | 99% | Yes |
| 1898 | 365 | 100% | Yes |
| 1899 | 364 | 100% | Yes |
| 1900 | 364 | 100% | Yes |
| 1901 | 362 | 99% | Yes |
| 1902 | 363 | 99% | Yes |
| 1903 | 361 | 99% | Yes |
| 1904 | 362 | 99% | Yes |
| 1905 | 296 | 81% | No |
| 1906 | 365 | 100% | Yes |
| 1907 | 361 | 99% | Yes |
| 1908 | 365 | 100% | Yes |
| 1909 | 365 | 100% | Yes |
| 1910 | 357 | 98% | Yes |
| 1911 | 365 | 100% | Yes |
| 1912 | 364 | 99% | Yes |
| 1913 | 220 | 60% | No |
| 1914 | 263 | 72% | No |
| 1915 | 365 | 100% | Yes |
| 1916 | 365 | 100% | Yes |
| 1917 | 365 | 100% | Yes |
| 1918 | 363 | 99% | Yes |
| 1919 | 362 | 99% | Yes |
| 1920 | 366 | 100% | Yes |
| 1921 | 365 | 100% | Yes |
| 1922 | 357 | 98% | Yes |
| 1923 | 321 | 88% | No |
| 1924 | 350 | 96% | Yes |
| 1925 | 343 | 94% | Yes |
| 1926 | 360 | 99% | Yes |
| 1927 | 364 | 100% | Yes |
| 1928 | 356 | 97% | Yes |
| 1929 | 364 | 100% | Yes |
| 1948 | 245 | 67% | No |
| 1949 | 365 | 100% | Yes |
| 1950 | 273 | 75% | No |
| 1997 | 275 | 75% | No |
| 1998 | 364 | 100% | Yes |
| 1999 | 117 | 32% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 26 April 1999 | Wellsboro, US | daily low min | -6.7 C (19.9 F) | 1.1 C (2.0 F) | 80 years | 36 of 100 (Notable) |
| 9 March 1999 | Wellsboro, US | daily low max (Tie) | -2.8 C (27.0 F) | tie | 84 years | 8 of 100 (Routine) |
| 8 March 1999 | Wellsboro, US | daily low min | -22.2 C (-8.0 F) | 5.5 C (9.9 F) | 85 years | 43 of 100 (Notable) |
| 8 March 1999 | Wellsboro, US | daily low max | -6.7 C (19.9 F) | 3.9 C (7.0 F) | 85 years | 40 of 100 (Notable) |
| 4 March 1999 | Wellsboro, US | daily rain | 51.1 mm (2.0 in) | 41.7 mm (1.6 in) | 89 years | 76 of 100 (Major) |
| 17 February 1999 | Wellsboro, US | daily high max (Tie) | 13.3 C (55.9 F) | tie | 101 years | 10 of 100 (Routine) |
| 12 February 1999 | Wellsboro, US | daily high max | 11.7 C (53.1 F) | 0.6 C (1.1 F) | 80 years | 35 of 100 (Notable) |
| 10 February 1999 | Wellsboro, US | daily high max (Tie) | 11.7 C (53.1 F) | tie | 0 years | 2 of 100 (Routine) |
| 3 February 1999 | Wellsboro, US | daily high min | -0.6 C (30.9 F) | 0.5 C (0.9 F) | 96 years | 38 of 100 (Notable) |
| 24 January 1999 | Wellsboro, US | daily high min | 3.9 C (39.0 F) | 1.7 C (3.1 F) | 89 years | 38 of 100 (Notable) |
| 24 January 1999 | Wellsboro, US | daily high max | 11.7 C (53.1 F) | 0.6 C (1.1 F) | 89 years | 37 of 100 (Notable) |
| 15 January 1999 | Wellsboro, US | daily rain | 29.7 mm (1.2 in) | 12.2 mm (0.5 in) | 80 years | 49 of 100 (Notable) |
| 22 December 1998 | Wellsboro, US | daily rain | 22.6 mm (0.9 in) | 8.1 mm (0.32 in) | 80 years | 20 of 100 (Routine) |
| 8 December 1998 | Wellsboro, US | daily high max | 17.8 C (64.0 F) | 1.1 C (2.0 F) | 81 years | 36 of 100 (Notable) |
| 7 December 1998 | Wellsboro, US | daily high min | 9.4 C (48.9 F) | 8.8 C (15.8 F) | 101 years | 53 of 100 (Notable) |
| 7 December 1998 | Wellsboro, US | monthly high max | 20.0 C (68.0 F) | 0.6 C (1.1 F) | 0 years | 21 of 100 (Routine) |
| 6 December 1998 | Wellsboro, US | daily high max | 18.9 C (66.0 F) | 1.7 C (3.1 F) | 85 years | 38 of 100 (Notable) |
| 6 December 1998 | Wellsboro, US | daily high min | 6.7 C (44.1 F) | 1.7 C (3.1 F) | 85 years | 37 of 100 (Notable) |
| 5 December 1998 | Wellsboro, US | daily high min | 5.6 C (42.1 F) | 2.8 C (5.0 F) | 72 years | 35 of 100 (Notable) |
| 5 December 1998 | Wellsboro, US | monthly high max | 19.4 C (66.9 F) | 0.5 C (0.9 F) | 0 years | 20 of 100 (Routine) |
Climate Trend
32 complete years, 1894 to 1998| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1894 | 8.4 C | +0.35 C |
| 1895 | 6.6 C | -1.41 C |
| 1896 | 7.6 C | -0.45 C |
| 1897 | 8.3 C | +0.26 C |
| 1898 | 9.5 C | +1.45 C |
| 1899 | 8.8 C | +0.75 C |
| 1900 | 9.3 C | +1.25 C |
| 1901 | 8.6 C | +0.55 C |
| 1903 | 8.9 C | +0.83 C |
| 1904 | 7.4 C | -0.64 C |
| 1906 | 8.2 C | +0.22 C |
| 1907 | 7.4 C | -0.67 C |
| 1908 | 8.8 C | +0.74 C |
| 1909 | 8.4 C | +0.42 C |
| 1910 | 8.4 C | +0.37 C |
| 1911 | 9.1 C | +1.07 C |
| 1912 | 8.0 C | +0.01 C |
| 1915 | 7.5 C | -0.54 C |
| 1916 | 7.4 C | -0.59 C |
| 1917 | 6.1 C | -1.90 C |
| 1918 | 7.7 C | -0.35 C |
| 1919 | 8.1 C | +0.06 C |
| 1920 | 6.7 C | -1.31 C |
| 1921 | 8.7 C | +0.71 C |
| 1922 | 8.1 C | +0.06 C |
| 1924 | 6.6 C | -1.46 C |
| 1926 | 6.7 C | -1.37 C |
| 1927 | 8.0 C | +0.01 C |
| 1928 | 8.0 C | +0.01 C |
| 1929 | 7.8 C | -0.23 C |
| 1949 | 8.8 C | +0.73 C |
| 1998 | 9.0 C | +0.98 C |
The fitted trend in annual mean temperature here over 1894 to 1998 is 0.01 C (-0.15 to 0.18) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.03 F (-0.27 to 0.32) 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 | 0.01 C (-0.15 to 0.18) per decade | 0.03 F (-0.27 to 0.32) per decade | 1894 to 1998 | 32 | Not clearly different from zero |
| Mean daily maximum | 0.15 C (-0.03 to 0.33) per decade | 0.3 F (-0.1 to 0.6) per decade | 1894 to 1998 | 32 | Not clearly different from zero |
| Mean daily minimum | -0.1 C (-0.3 to 0.1) per decade | -0.2 F (-0.6 to 0.1) per decade | 1894 to 1998 | 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
1893 to 1999| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 38.3 C (100.9 F) | 1911 | 34.4 C (93.9 F) | 43 |
| Coldest night (TNn) | -33.3 C (-27.9 F) | 1894 | -26.1 C (-15.0 F) | 43 |
| Wettest day (Rx1day) | 132.8 mm (5.2 in) | 1950 | 50.8 mm (2.0 in) | 42 |
| Wettest five days (Rx5day) | 202.7 mm (8.0 in) | 1894 | 74.0 mm (2.9 in) | 42 |
| Longest dry spell (CDD) | 44 days | 1924 | 19 days | 42 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1893 | 32.2 C (90.0 F) |
| 1894 | 35.0 C (95.0 F) |
| 1895 | 36.7 C (98.1 F) |
| 1896 | 33.9 C (93.0 F) |
| 1897 | 35.0 C (95.0 F) |
| 1898 | 35.6 C (96.1 F) |
| 1899 | 35.6 C (96.1 F) |
| 1900 | 35.6 C (96.1 F) |
| 1901 | 35.6 C (96.1 F) |
| 1902 | 33.3 C (91.9 F) |
| 1903 | 33.9 C (93.0 F) |
| 1904 | 33.9 C (93.0 F) |
| 1905 | 34.4 C (93.9 F) |
| 1906 | 32.2 C (90.0 F) |
| 1907 | 33.3 C (91.9 F) |
| 1908 | 34.4 C (93.9 F) |
| 1909 | 35.6 C (96.1 F) |
| 1910 | 36.7 C (98.1 F) |
| 1911 | 38.3 C (100.9 F) |
| 1912 | 34.4 C (93.9 F) |
| 1913 | 31.7 C (89.1 F) |
| 1914 | 33.3 C (91.9 F) |
| 1915 | 31.1 C (88.0 F) |
| 1916 | 34.4 C (93.9 F) |
| 1917 | 36.1 C (97.0 F) |
| 1918 | 37.8 C (100.0 F) |
| 1919 | 35.0 C (95.0 F) |
| 1920 | 31.7 C (89.1 F) |
| 1921 | 34.4 C (93.9 F) |
| 1922 | 33.3 C (91.9 F) |
| 1923 | 33.9 C (93.0 F) |
| 1924 | 33.9 C (93.0 F) |
| 1925 | 35.0 C (95.0 F) |
| 1926 | 35.0 C (95.0 F) |
| 1927 | 34.4 C (93.9 F) |
| 1928 | 33.9 C (93.0 F) |
| 1929 | 33.9 C (93.0 F) |
| 1948 | 36.7 C (98.1 F) |
| 1949 | 35.6 C (96.1 F) |
| 1950 | 33.9 C (93.0 F) |
| 1997 | 32.8 C (91.0 F) |
| 1998 | 32.8 C (91.0 F) |
| 1999 | 23.3 C (73.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1893 | -26.7 C (-16.1 F) |
| 1894 | -33.3 C (-27.9 F) |
| 1895 | -30.0 C (-22.0 F) |
| 1896 | -25.6 C (-14.1 F) |
| 1897 | -22.2 C (-8.0 F) |
| 1898 | -23.3 C (-9.9 F) |
| 1899 | -31.7 C (-25.1 F) |
| 1900 | -20.0 C (-4.0 F) |
| 1901 | -23.3 C (-9.9 F) |
| 1902 | -20.0 C (-4.0 F) |
| 1903 | -20.6 C (-5.1 F) |
| 1904 | -31.7 C (-25.1 F) |
| 1905 | -24.4 C (-11.9 F) |
| 1906 | -25.0 C (-13.0 F) |
| 1907 | -30.6 C (-23.1 F) |
| 1908 | -30.0 C (-22.0 F) |
| 1909 | -26.7 C (-16.1 F) |
| 1910 | -27.2 C (-17.0 F) |
| 1911 | -20.0 C (-4.0 F) |
| 1912 | -32.8 C (-27.0 F) |
| 1913 | -18.3 C (-0.9 F) |
| 1914 | -32.2 C (-26.0 F) |
| 1915 | -27.8 C (-18.0 F) |
| 1916 | -31.7 C (-25.1 F) |
| 1917 | -29.4 C (-20.9 F) |
| 1918 | -28.9 C (-20.0 F) |
| 1919 | -28.3 C (-18.9 F) |
| 1920 | -29.4 C (-20.9 F) |
| 1921 | -25.6 C (-14.1 F) |
| 1922 | -28.3 C (-18.9 F) |
| 1923 | -25.0 C (-13.0 F) |
| 1924 | -31.1 C (-24.0 F) |
| 1925 | -31.7 C (-25.1 F) |
| 1926 | -26.7 C (-16.1 F) |
| 1927 | -26.1 C (-15.0 F) |
| 1928 | -25.0 C (-13.0 F) |
| 1929 | -23.3 C (-9.9 F) |
| 1948 | -17.8 C (0.0 F) |
| 1949 | -21.1 C (-6.0 F) |
| 1950 | -23.9 C (-11.0 F) |
| 1997 | -12.2 C (10.0 F) |
| 1998 | -25.6 C (-14.1 F) |
| 1999 | -22.2 C (-8.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1893 | 57.2 mm (2.3 in) |
| 1894 | 79.5 mm (3.1 in) |
| 1895 | 57.2 mm (2.3 in) |
| 1896 | 74.7 mm (2.9 in) |
| 1897 | 44.5 mm (1.8 in) |
| 1898 | 69.9 mm (2.8 in) |
| 1899 | 45.7 mm (1.8 in) |
| 1900 | 66.0 mm (2.6 in) |
| 1901 | 49.5 mm (1.9 in) |
| 1902 | 69.9 mm (2.8 in) |
| 1903 | 53.3 mm (2.1 in) |
| 1904 | 24.1 mm (0.9 in) |
| 1905 | n/a |
| 1906 | 51.6 mm (2.0 in) |
| 1907 | 32.5 mm (1.3 in) |
| 1908 | 36.3 mm (1.4 in) |
| 1909 | 58.4 mm (2.3 in) |
| 1910 | 62.5 mm (2.5 in) |
| 1911 | 24.9 mm (1.0 in) |
| 1912 | 40.6 mm (1.6 in) |
| 1913 | 50.8 mm (2.0 in) |
| 1914 | 38.4 mm (1.5 in) |
| 1915 | 55.9 mm (2.2 in) |
| 1916 | 60.2 mm (2.4 in) |
| 1917 | 45.2 mm (1.8 in) |
| 1918 | 49.8 mm (2.0 in) |
| 1919 | 75.7 mm (3.0 in) |
| 1920 | 42.4 mm (1.7 in) |
| 1921 | 39.1 mm (1.5 in) |
| 1922 | 49.5 mm (1.9 in) |
| 1923 | 45.2 mm (1.8 in) |
| 1924 | 49.5 mm (1.9 in) |
| 1925 | 50.8 mm (2.0 in) |
| 1926 | 44.5 mm (1.8 in) |
| 1927 | 51.3 mm (2.0 in) |
| 1928 | 46.7 mm (1.8 in) |
| 1929 | 57.4 mm (2.3 in) |
| 1948 | 44.5 mm (1.8 in) |
| 1949 | 58.4 mm (2.3 in) |
| 1950 | 132.8 mm (5.2 in) |
| 1997 | 29.7 mm (1.2 in) |
| 1998 | 52.6 mm (2.1 in) |
| 1999 | 51.1 mm (2.0 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1893 | 76.5 mm (3.0 in) |
| 1894 | 202.7 mm (8.0 in) |
| 1895 | 62.3 mm (2.5 in) |
| 1896 | 55.9 mm (2.2 in) |
| 1897 | 60.2 mm (2.4 in) |
| 1898 | 114.4 mm (4.5 in) |
| 1899 | 78.8 mm (3.1 in) |
| 1900 | 114.2 mm (4.5 in) |
| 1901 | 79.0 mm (3.1 in) |
| 1902 | 139.8 mm (5.5 in) |
| 1903 | 68.5 mm (2.7 in) |
| 1904 | 30.5 mm (1.2 in) |
| 1905 | n/a |
| 1906 | 71.4 mm (2.8 in) |
| 1907 | 56.4 mm (2.2 in) |
| 1908 | 71.6 mm (2.8 in) |
| 1909 | 97.0 mm (3.8 in) |
| 1910 | 114.5 mm (4.5 in) |
| 1911 | 57.1 mm (2.2 in) |
| 1912 | 60.7 mm (2.4 in) |
| 1913 | 88.5 mm (3.5 in) |
| 1914 | 43.2 mm (1.7 in) |
| 1915 | 63.0 mm (2.5 in) |
| 1916 | 87.1 mm (3.4 in) |
| 1917 | 80.8 mm (3.2 in) |
| 1918 | 76.9 mm (3.0 in) |
| 1919 | 104.5 mm (4.1 in) |
| 1920 | 90.0 mm (3.5 in) |
| 1921 | 73.1 mm (2.9 in) |
| 1922 | 72.6 mm (2.9 in) |
| 1923 | 45.2 mm (1.8 in) |
| 1924 | 94.0 mm (3.7 in) |
| 1925 | 55.1 mm (2.2 in) |
| 1926 | 63.6 mm (2.5 in) |
| 1927 | 74.9 mm (2.9 in) |
| 1928 | 91.4 mm (3.6 in) |
| 1929 | 86.4 mm (3.4 in) |
| 1948 | 57.7 mm (2.3 in) |
| 1949 | 72.6 mm (2.9 in) |
| 1950 | 161.2 mm (6.3 in) |
| 1997 | 58.9 mm (2.3 in) |
| 1998 | 78.5 mm (3.1 in) |
| 1999 | 63.8 mm (2.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1893 | 22 days |
| 1894 | 24 days |
| 1895 | 19 days |
| 1896 | 9 days |
| 1897 | 11 days |
| 1898 | 19 days |
| 1899 | 16 days |
| 1900 | 25 days |
| 1901 | 24 days |
| 1902 | 20 days |
| 1903 | 23 days |
| 1904 | 4 days |
| 1905 | n/a |
| 1906 | 27 days |
| 1907 | 14 days |
| 1908 | 21 days |
| 1909 | 22 days |
| 1910 | 14 days |
| 1911 | 15 days |
| 1912 | 12 days |
| 1913 | 13 days |
| 1914 | 20 days |
| 1915 | 16 days |
| 1916 | 16 days |
| 1917 | 21 days |
| 1918 | 19 days |
| 1919 | 21 days |
| 1920 | 14 days |
| 1921 | 16 days |
| 1922 | 24 days |
| 1923 | 24 days |
| 1924 | 44 days |
| 1925 | 16 days |
| 1926 | 29 days |
| 1927 | 17 days |
| 1928 | 18 days |
| 1929 | 22 days |
| 1948 | 14 days |
| 1949 | 12 days |
| 1950 | 15 days |
| 1997 | 19 days |
| 1998 | 18 days |
| 1999 | 15 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 Wellsboro falls on 29 May and the median first autumn frost on 21 September, which leaves a median of 116 days between them.
Fitted over all years, the growing season changes by -1.0 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1896 to 1998) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 29 May | n/a | 29 May | n/a | +1.5 days per decade |
| First autumn frost | 21 September | n/a | 22 September | n/a | +0.6 days per decade |
| Growing days | 116 days | n/a | 117 days | n/a | -1.0 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
30 years, 1894 to 1998A day with at least 50.6 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 82.2 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 | 50.6 mm (2.0 in) | |
| 5 years | 61.3 mm (2.4 in) | |
| 10 years | 67.4 mm (2.7 in) | |
| 25 years | 74.0 mm (2.9 in) | |
| 50 years | 78.4 mm (3.1 in) | Longer than the 30 years of record |
| 100 years | 82.2 mm (3.2 in) | Longer than the 30 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, 30 years of values from 1894 to 1998.
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: 79.5 mm (3.1 in) in 1894; 75.7 mm (3.0 in) in 1919; 69.9 mm (2.8 in) in 1902.
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).