Robertsburg Weather Records (USC00467614)
Record envelope, standing records and threshold days for Robertsburg (USC00467614), West Virginia, United States, with 40 years of record.
Key Facts for Robertsburg
- Robertsburg (USC00467614) is a weather station in West Virginia, United States at 38.65 latitude and -81.97 longitude, 174 m (571 ft) above sea level.
- The station reports from 1900 to 1939, 40 years of record.
- 1,464 records set at Robertsburg still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Robertsburg set a daily record precipitation of 50.0 mm (2.0 in) on 5 March 1939.
About the Station
- Location: West Virginia, United States, 38.65 latitude, -81.97 longitude.
- Elevation: 174 m (571 ft).
- Period of record: 1900 to 1939, 40 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 | 27.8 C (82.0 F) | -28.9 C (-20.0 F) | n/a | n/a |
| Feb | 26.7 C (80.1 F) | -25.6 C (-14.1 F) | n/a | n/a |
| Mar | 32.2 C (90.0 F) | -21.1 C (-6.0 F) | n/a | n/a |
| Apr | 35.6 C (96.1 F) | -12.2 C (10.0 F) | n/a | n/a |
| May | 36.7 C (98.1 F) | -2.2 C (28.0 F) | n/a | n/a |
| Jun | 38.3 C (100.9 F) | 3.3 C (37.9 F) | n/a | n/a |
| Jul | 40.6 C (105.1 F) | 7.2 C (45.0 F) | n/a | n/a |
| Aug | 41.1 C (106.0 F) | 6.1 C (43.0 F) | n/a | n/a |
| Sep | 40.6 C (105.1 F) | -1.1 C (30.0 F) | n/a | n/a |
| Oct | 34.4 C (93.9 F) | -7.2 C (19.0 F) | n/a | n/a |
| Nov | 31.1 C (88.0 F) | -15.6 C (3.9 F) | n/a | n/a |
| Dec | 24.4 C (75.9 F) | -30.0 C (-22.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1900 | 39 |
| 1901 | 55 |
| 1902 | 52 |
| 1903 | 63 |
| 1904 | 32 |
| 1905 | 22 |
| 1906 | 23 |
| 1907 | 33 |
| 1908 | 25 |
| 1909 | 28 |
| 1910 | 32 |
| 1911 | 48 |
| 1912 | 36 |
| 1913 | 38 |
| 1914 | 67 |
| 1915 | 28 |
| 1916 | 37 |
| 1917 | 48 |
| 1918 | 49 |
| 1919 | 26 |
| 1920 | 33 |
| 1921 | 25 |
| 1922 | 24 |
| 1923 | 33 |
| 1924 | 38 |
| 1925 | 47 |
| 1926 | 27 |
| 1927 | 44 |
| 1928 | 27 |
| 1929 | 47 |
| 1930 | 63 |
| 1931 | 30 |
| 1932 | 56 |
| 1933 | 34 |
| 1934 | 32 |
| 1935 | 22 |
| 1936 | 45 |
| 1937 | 30 |
| 1938 | 22 |
| 1939 | 4 |
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 1932-07-05 | Record daily precipitation | Record daily precipitation 101.6 mm (4.0 in) |
Wettest Day of Each Month
Jul: 101.6 mm (4.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 47.0 mm (1.9 in) | 12 January 1913 |
| Feb | 66.8 mm (2.6 in) | 3 February 1939 |
| Mar | 56.1 mm (2.2 in) | 17 March 1932 |
| Apr | 97.8 mm (3.9 in) | 19 April 1901 |
| May | 64.3 mm (2.5 in) | 27 May 1917 |
| Jun | 87.6 mm (3.4 in) | 27 June 1910 |
| Jul | 101.6 mm (4.0 in) | 5 July 1932 |
| Aug | 85.6 mm (3.4 in) | 12 August 1912 |
| Sep | 45.0 mm (1.8 in) | 30 September 1924 |
| Oct | 95.3 mm (3.8 in) | 1 October 1915 |
| Nov | 53.3 mm (2.1 in) | 15 November 1915 |
| Dec | 57.7 mm (2.3 in) | 14 December 1901 |
Period of Record Coverage
1900 to 1939| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1900 | 209 | 57% | No |
| 1901 | 360 | 99% | Yes |
| 1902 | 348 | 95% | Yes |
| 1903 | 345 | 95% | Yes |
| 1904 | 342 | 93% | Yes |
| 1905 | 358 | 98% | Yes |
| 1906 | 359 | 98% | Yes |
| 1907 | 360 | 99% | Yes |
| 1908 | 366 | 100% | Yes |
| 1909 | 336 | 92% | Yes |
| 1910 | 363 | 99% | Yes |
| 1911 | 365 | 100% | Yes |
| 1912 | 366 | 100% | Yes |
| 1913 | 364 | 100% | Yes |
| 1914 | 363 | 99% | Yes |
| 1915 | 363 | 99% | Yes |
| 1916 | 365 | 100% | Yes |
| 1917 | 362 | 99% | Yes |
| 1918 | 364 | 100% | Yes |
| 1919 | 363 | 99% | Yes |
| 1920 | 357 | 98% | Yes |
| 1921 | 360 | 99% | Yes |
| 1922 | 362 | 99% | Yes |
| 1923 | 364 | 100% | Yes |
| 1924 | 366 | 100% | Yes |
| 1925 | 363 | 99% | Yes |
| 1926 | 363 | 99% | Yes |
| 1927 | 365 | 100% | Yes |
| 1928 | 362 | 99% | Yes |
| 1929 | 364 | 100% | Yes |
| 1930 | 354 | 97% | Yes |
| 1931 | 363 | 99% | Yes |
| 1932 | 352 | 96% | Yes |
| 1933 | 353 | 97% | Yes |
| 1934 | 294 | 81% | No |
| 1935 | 328 | 90% | No |
| 1936 | 351 | 96% | Yes |
| 1937 | 358 | 98% | Yes |
| 1938 | 319 | 87% | No |
| 1939 | 62 | 17% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 5 March 1939 | Robertsburg, US | daily rain | 50.0 mm (2.0 in) | 17.0 mm (0.7 in) | 36 years | 34 of 100 (Routine) |
| 2 March 1939 | Robertsburg, US | daily high max | 23.3 C (73.9 F) | 3.9 C (7.0 F) | 32 years | 18 of 100 (Routine) |
| 27 February 1939 | Robertsburg, US | monthly high max (Tie) | 26.7 C (80.1 F) | tie | 3 years | 3 of 100 (Routine) |
| 23 February 1939 | Robertsburg, US | daily low max (Tie) | -2.2 C (28.0 F) | tie | 37 years | 3 of 100 (Routine) |
| 3 February 1939 | Robertsburg, US | monthly rain | 66.8 mm (2.6 in) | 17.8 mm (0.7 in) | 36 years | 49 of 100 (Notable) |
| 11 January 1939 | Robertsburg, US | daily high max | 20.0 C (68.0 F) | 3.9 C (7.0 F) | 5 years | 10 of 100 (Routine) |
| 6 January 1939 | Robertsburg, US | daily high max | 21.1 C (70.0 F) | 0.5 C (0.9 F) | 32 years | 13 of 100 (Routine) |
| 5 January 1939 | Robertsburg, US | daily high max | 21.1 C (70.0 F) | 2.2 C (4.0 F) | 17 years | 12 of 100 (Routine) |
| 25 November 1938 | Robertsburg, US | daily low max | -2.8 C (27.0 F) | 1.1 C (2.0 F) | 20 years | 10 of 100 (Routine) |
| 13 November 1938 | Robertsburg, US | daily high max | 26.1 C (79.0 F) | 0.5 C (0.9 F) | 7 years | 5 of 100 (Routine) |
| 8 November 1938 | Robertsburg, US | daily high max | 27.2 C (81.0 F) | 2.2 C (4.0 F) | 23 years | 12 of 100 (Routine) |
| 8 November 1938 | Robertsburg, US | daily high min | 8.3 C (46.9 F) | 1.1 C (2.0 F) | 17 years | 10 of 100 (Routine) |
| 5 November 1938 | Robertsburg, US | daily rain | 28.4 mm (1.1 in) | 1.0 mm (0.04 in) | 1 year | 4 of 100 (Routine) |
| 19 October 1938 | Robertsburg, US | daily high max | 31.7 C (89.1 F) | 1.1 C (2.0 F) | 28 years | 12 of 100 (Routine) |
| 15 August 1938 | Robertsburg, US | daily high max (Tie) | 35.0 C (95.0 F) | tie | 20 years | 2 of 100 (Routine) |
| 22 July 1938 | Robertsburg, US | daily low max | 25.0 C (77.0 F) | 0.6 C (1.1 F) | 32 years | 13 of 100 (Routine) |
| 9 July 1938 | Robertsburg, US | daily rain | 38.9 mm (1.5 in) | 26.2 mm (1.0 in) | 35 years | 35 of 100 (Notable) |
| 29 June 1938 | Robertsburg, US | daily low max | 22.2 C (72.0 F) | 3.4 C (6.1 F) | 36 years | 20 of 100 (Routine) |
| 28 June 1938 | Robertsburg, US | daily low max | 18.9 C (66.0 F) | 3.3 C (5.9 F) | 8 years | 12 of 100 (Routine) |
| 17 June 1938 | Robertsburg, US | daily rain | 30.2 mm (1.2 in) | 11.9 mm (0.5 in) | 12 years | 17 of 100 (Routine) |
Climate Trend
32 complete years, 1901 to 1937| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1901 | 12.7 C | +0.27 C |
| 1902 | 13.4 C | +0.96 C |
| 1903 | 13.2 C | +0.82 C |
| 1904 | 12.4 C | -0.02 C |
| 1905 | 12.1 C | -0.31 C |
| 1906 | 13.0 C | +0.61 C |
| 1907 | 11.9 C | -0.49 C |
| 1908 | 12.8 C | +0.39 C |
| 1910 | 11.8 C | -0.61 C |
| 1911 | 13.3 C | +0.91 C |
| 1912 | 11.3 C | -1.06 C |
| 1913 | 12.8 C | +0.43 C |
| 1914 | 12.0 C | -0.44 C |
| 1915 | 11.7 C | -0.70 C |
| 1917 | 10.7 C | -1.75 C |
| 1918 | 12.2 C | -0.22 C |
| 1919 | 13.0 C | +0.55 C |
| 1920 | 11.7 C | -0.70 C |
| 1921 | 14.1 C | +1.68 C |
| 1922 | 13.2 C | +0.76 C |
| 1923 | 12.5 C | +0.10 C |
| 1924 | 11.0 C | -1.41 C |
| 1925 | 12.0 C | -0.41 C |
| 1926 | 11.2 C | -1.21 C |
| 1927 | 12.4 C | +0.00 C |
| 1928 | 12.0 C | -0.40 C |
| 1929 | 12.1 C | -0.33 C |
| 1931 | 13.4 C | +0.97 C |
| 1932 | 12.8 C | +0.44 C |
| 1933 | 12.7 C | +0.34 C |
| 1936 | 12.8 C | +0.41 C |
| 1937 | 12.7 C | +0.29 C |
The fitted trend in annual mean temperature here over 1901 to 1937 is -0.03 C (-0.30 to 0.24) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.5 to 0.4) 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 | -0.03 C (-0.30 to 0.24) per decade | -0.1 F (-0.5 to 0.4) per decade | 1901 to 1937 | 32 | Not clearly different from zero |
| Mean daily maximum | 0.28 C (-0.01 to 0.57) per decade | 0.50 F (-0.03 to 1.03) per decade | 1901 to 1937 | 32 | Not clearly different from zero |
| Mean daily minimum | -0.34 C (-0.69 to 0.02) per decade | -0.61 F (-1.24 to 0.03) per decade | 1901 to 1937 | 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
1900 to 1939| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.1 C (106.0 F) | 1918 | 36.4 C (97.5 F) | 40 |
| Coldest night (TNn) | -30.0 C (-22.0 F) | 1917 | -19.4 C (-2.9 F) | 40 |
| Wettest day (Rx1day) | 101.6 mm (4.0 in) | 1932 | 50.3 mm (2.0 in) | 40 |
| Wettest five days (Rx5day) | 156.8 mm (6.2 in) | 1932 | 84.1 mm (3.3 in) | 40 |
| Longest dry spell (CDD) | 30 days | 1909 | 19 days | 40 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1900 | 36.1 C (97.0 F) |
| 1901 | 37.2 C (99.0 F) |
| 1902 | 35.6 C (96.1 F) |
| 1903 | 36.7 C (98.1 F) |
| 1904 | 34.4 C (93.9 F) |
| 1905 | 35.6 C (96.1 F) |
| 1906 | 34.4 C (93.9 F) |
| 1907 | 37.2 C (99.0 F) |
| 1908 | 36.7 C (98.1 F) |
| 1909 | 36.7 C (98.1 F) |
| 1910 | 35.0 C (95.0 F) |
| 1911 | 40.6 C (105.1 F) |
| 1912 | 36.1 C (97.0 F) |
| 1913 | 37.8 C (100.0 F) |
| 1914 | 40.0 C (104.0 F) |
| 1915 | 35.6 C (96.1 F) |
| 1916 | 36.1 C (97.0 F) |
| 1917 | 35.6 C (96.1 F) |
| 1918 | 41.1 C (106.0 F) |
| 1919 | 36.1 C (97.0 F) |
| 1920 | 33.9 C (93.0 F) |
| 1921 | 37.8 C (100.0 F) |
| 1922 | 36.7 C (98.1 F) |
| 1923 | 35.6 C (96.1 F) |
| 1924 | 36.1 C (97.0 F) |
| 1925 | 37.8 C (100.0 F) |
| 1926 | 38.3 C (100.9 F) |
| 1927 | 35.6 C (96.1 F) |
| 1928 | 35.0 C (95.0 F) |
| 1929 | 35.6 C (96.1 F) |
| 1930 | 40.0 C (104.0 F) |
| 1931 | 38.3 C (100.9 F) |
| 1932 | 40.6 C (105.1 F) |
| 1933 | 38.3 C (100.9 F) |
| 1934 | 40.6 C (105.1 F) |
| 1935 | 35.6 C (96.1 F) |
| 1936 | 40.0 C (104.0 F) |
| 1937 | 37.2 C (99.0 F) |
| 1938 | 35.0 C (95.0 F) |
| 1939 | 26.7 C (80.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1900 | -7.8 C (18.0 F) |
| 1901 | -16.7 C (1.9 F) |
| 1902 | -13.9 C (7.0 F) |
| 1903 | -20.6 C (-5.1 F) |
| 1904 | -19.4 C (-2.9 F) |
| 1905 | -23.3 C (-9.9 F) |
| 1906 | -21.1 C (-6.0 F) |
| 1907 | -23.3 C (-9.9 F) |
| 1908 | -14.4 C (6.1 F) |
| 1909 | -18.3 C (-0.9 F) |
| 1910 | -19.4 C (-2.9 F) |
| 1911 | -11.7 C (10.9 F) |
| 1912 | -28.9 C (-20.0 F) |
| 1913 | -15.0 C (5.0 F) |
| 1914 | -23.3 C (-9.9 F) |
| 1915 | -16.1 C (3.0 F) |
| 1916 | -19.4 C (-2.9 F) |
| 1917 | -30.0 C (-22.0 F) |
| 1918 | -26.7 C (-16.1 F) |
| 1919 | -17.8 C (0.0 F) |
| 1920 | -20.0 C (-4.0 F) |
| 1921 | -15.0 C (5.0 F) |
| 1922 | -12.8 C (9.0 F) |
| 1923 | -17.8 C (0.0 F) |
| 1924 | -19.4 C (-2.9 F) |
| 1925 | -26.1 C (-15.0 F) |
| 1926 | -19.4 C (-2.9 F) |
| 1927 | -20.0 C (-4.0 F) |
| 1928 | -18.3 C (-0.9 F) |
| 1929 | -21.7 C (-7.1 F) |
| 1930 | -21.1 C (-6.0 F) |
| 1931 | -13.3 C (8.1 F) |
| 1932 | -20.0 C (-4.0 F) |
| 1933 | -18.9 C (-2.0 F) |
| 1934 | -22.8 C (-9.0 F) |
| 1935 | -19.4 C (-2.9 F) |
| 1936 | -26.7 C (-16.1 F) |
| 1937 | -16.7 C (1.9 F) |
| 1938 | -12.8 C (9.0 F) |
| 1939 | -16.1 C (3.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1900 | 31.8 mm (1.3 in) |
| 1901 | 97.8 mm (3.9 in) |
| 1902 | 54.9 mm (2.2 in) |
| 1903 | 35.6 mm (1.4 in) |
| 1904 | 34.0 mm (1.3 in) |
| 1905 | 52.8 mm (2.1 in) |
| 1906 | 38.1 mm (1.5 in) |
| 1907 | 82.6 mm (3.3 in) |
| 1908 | 53.3 mm (2.1 in) |
| 1909 | 25.4 mm (1.0 in) |
| 1910 | 87.6 mm (3.4 in) |
| 1911 | 68.6 mm (2.7 in) |
| 1912 | 85.6 mm (3.4 in) |
| 1913 | 58.4 mm (2.3 in) |
| 1914 | 36.1 mm (1.4 in) |
| 1915 | 95.3 mm (3.8 in) |
| 1916 | 35.6 mm (1.4 in) |
| 1917 | 64.3 mm (2.5 in) |
| 1918 | 52.1 mm (2.1 in) |
| 1919 | 49.8 mm (2.0 in) |
| 1920 | 35.3 mm (1.4 in) |
| 1921 | 45.7 mm (1.8 in) |
| 1922 | 50.8 mm (2.0 in) |
| 1923 | 40.6 mm (1.6 in) |
| 1924 | 57.2 mm (2.3 in) |
| 1925 | 65.5 mm (2.6 in) |
| 1926 | 49.0 mm (1.9 in) |
| 1927 | 37.6 mm (1.5 in) |
| 1928 | 40.1 mm (1.6 in) |
| 1929 | 84.8 mm (3.3 in) |
| 1930 | 27.2 mm (1.1 in) |
| 1931 | 42.9 mm (1.7 in) |
| 1932 | 101.6 mm (4.0 in) |
| 1933 | 40.6 mm (1.6 in) |
| 1934 | 44.2 mm (1.7 in) |
| 1935 | 59.7 mm (2.4 in) |
| 1936 | 51.8 mm (2.0 in) |
| 1937 | 46.7 mm (1.8 in) |
| 1938 | 38.9 mm (1.5 in) |
| 1939 | 66.8 mm (2.6 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1900 | 85.6 mm (3.4 in) |
| 1901 | 137.7 mm (5.4 in) |
| 1902 | 80.7 mm (3.2 in) |
| 1903 | 55.6 mm (2.2 in) |
| 1904 | 47.0 mm (1.9 in) |
| 1905 | 90.6 mm (3.6 in) |
| 1906 | 79.0 mm (3.1 in) |
| 1907 | 104.1 mm (4.1 in) |
| 1908 | 83.8 mm (3.3 in) |
| 1909 | 57.3 mm (2.3 in) |
| 1910 | 103.3 mm (4.1 in) |
| 1911 | 105.9 mm (4.2 in) |
| 1912 | 111.2 mm (4.4 in) |
| 1913 | 79.7 mm (3.1 in) |
| 1914 | 58.9 mm (2.3 in) |
| 1915 | 132.9 mm (5.2 in) |
| 1916 | 72.4 mm (2.9 in) |
| 1917 | 115.6 mm (4.6 in) |
| 1918 | 80.8 mm (3.2 in) |
| 1919 | 88.2 mm (3.5 in) |
| 1920 | 63.9 mm (2.5 in) |
| 1921 | 72.8 mm (2.9 in) |
| 1922 | 95.6 mm (3.8 in) |
| 1923 | 73.1 mm (2.9 in) |
| 1924 | 82.7 mm (3.3 in) |
| 1925 | 105.9 mm (4.2 in) |
| 1926 | 115.2 mm (4.5 in) |
| 1927 | 91.5 mm (3.6 in) |
| 1928 | 73.4 mm (2.9 in) |
| 1929 | 117.8 mm (4.6 in) |
| 1930 | 31.8 mm (1.3 in) |
| 1931 | 72.6 mm (2.9 in) |
| 1932 | 156.8 mm (6.2 in) |
| 1933 | 93.8 mm (3.7 in) |
| 1934 | 57.9 mm (2.3 in) |
| 1935 | 96.8 mm (3.8 in) |
| 1936 | 84.3 mm (3.3 in) |
| 1937 | 120.1 mm (4.7 in) |
| 1938 | 56.7 mm (2.2 in) |
| 1939 | 75.2 mm (3.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1900 | 17 days |
| 1901 | 19 days |
| 1902 | 19 days |
| 1903 | 24 days |
| 1904 | 19 days |
| 1905 | 19 days |
| 1906 | 17 days |
| 1907 | 19 days |
| 1908 | 20 days |
| 1909 | 30 days |
| 1910 | 28 days |
| 1911 | 13 days |
| 1912 | 18 days |
| 1913 | 23 days |
| 1914 | 18 days |
| 1915 | 22 days |
| 1916 | 19 days |
| 1917 | 14 days |
| 1918 | 21 days |
| 1919 | 12 days |
| 1920 | 25 days |
| 1921 | 11 days |
| 1922 | 24 days |
| 1923 | 27 days |
| 1924 | 26 days |
| 1925 | 17 days |
| 1926 | 16 days |
| 1927 | 14 days |
| 1928 | 13 days |
| 1929 | 14 days |
| 1930 | 15 days |
| 1931 | 19 days |
| 1932 | 17 days |
| 1933 | 13 days |
| 1934 | 19 days |
| 1935 | 16 days |
| 1936 | 22 days |
| 1937 | 15 days |
| 1938 | 13 days |
| 1939 | 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
32 years with a frostAcross 32 years with a frost, the median last spring frost at Robertsburg falls on 28 April and the median first autumn frost on 15 October, which leaves a median of 173 days between them.
Fitted over all years, the growing season changes by -4.9 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1903 to 1937) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 28 April | n/a | 28 April | n/a | +3.4 days per decade |
| First autumn frost | 15 October | n/a | 15 October | n/a | -1.5 days per decade |
| Growing days | 173 days | n/a | 172 days | n/a | -4.9 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, 1903 to 1938A day with at least 48.7 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 126.6 mm (5.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 48.7 mm (1.9 in) | |
| 5 years | 66.1 mm (2.6 in) | |
| 10 years | 78.9 mm (3.1 in) | |
| 25 years | 96.7 mm (3.8 in) | |
| 50 years | 111.1 mm (4.4 in) | Longer than the 36 years of record |
| 100 years | 126.6 mm (5.0 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 1903 to 1938.
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: 101.6 mm (4.0 in) in 1932; 95.3 mm (3.8 in) in 1915; 87.6 mm (3.4 in) in 1910.
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).