Sycamore Weather Records (USC00118452)
Record envelope, standing records and threshold days for Sycamore (USC00118452), Illinois, United States, with 73 years of record.
Key Facts for Sycamore
- Sycamore (USC00118452) is a weather station in Illinois, United States at 41.98 latitude and -88.68 longitude, 256 m (840 ft) above sea level.
- The station reports from 1893 to 1965, 73 years of record.
- 1,464 records set at Sycamore still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Sycamore tied a daily record high minimum temperature of 18.9 C (66.0 F) on 20 September 1965.
About the Station
- Location: Illinois, United States, 41.98 latitude, -88.68 longitude.
- Elevation: 256 m (840 ft).
- Period of record: 1893 to 1965, 73 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 | 17.2 C (63.0 F) | -31.7 C (-25.1 F) | n/a | n/a |
| Feb | 18.9 C (66.0 F) | -32.2 C (-26.0 F) | n/a | n/a |
| Mar | 28.9 C (84.0 F) | -25.0 C (-13.0 F) | n/a | n/a |
| Apr | 33.3 C (91.9 F) | -10.0 C (14.0 F) | n/a | n/a |
| May | 41.7 C (107.1 F) | -4.4 C (24.1 F) | n/a | n/a |
| Jun | 41.1 C (106.0 F) | 0.6 C (33.1 F) | n/a | n/a |
| Jul | 42.8 C (109.0 F) | 4.4 C (39.9 F) | n/a | n/a |
| Aug | 40.0 C (104.0 F) | 1.7 C (35.1 F) | n/a | n/a |
| Sep | 38.3 C (100.9 F) | -5.6 C (21.9 F) | n/a | n/a |
| Oct | 33.9 C (93.0 F) | -9.4 C (15.1 F) | n/a | n/a |
| Nov | 27.8 C (82.0 F) | -22.8 C (-9.0 F) | n/a | n/a |
| Dec | 18.9 C (66.0 F) | -31.1 C (-24.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1896 | 23 |
| 1897 | 37 |
| 1898 | 14 |
| 1899 | 32 |
| 1900 | 30 |
| 1901 | 20 |
| 1902 | 19 |
| 1903 | 21 |
| 1904 | 12 |
| 1905 | 18 |
| 1906 | 11 |
| 1907 | 18 |
| 1908 | 28 |
| 1909 | 33 |
| 1910 | 27 |
| 1911 | 32 |
| 1912 | 27 |
| 1913 | 34 |
| 1914 | 26 |
| 1915 | 28 |
| 1916 | 27 |
| 1917 | 23 |
| 1918 | 27 |
| 1919 | 11 |
| 1920 | 22 |
| 1921 | 20 |
| 1922 | 17 |
| 1923 | 19 |
| 1924 | 24 |
| 1925 | 23 |
| 1926 | 15 |
| 1927 | 18 |
| 1928 | 19 |
| 1929 | 21 |
| 1930 | 39 |
| 1931 | 22 |
| 1932 | 24 |
| 1933 | 22 |
| 1934 | 29 |
| 1935 | 21 |
| 1936 | 48 |
| 1937 | 11 |
| 1938 | 22 |
| 1939 | 19 |
| 1940 | 26 |
| 1941 | 13 |
| 1942 | 21 |
| 1943 | 11 |
| 1944 | 20 |
| 1945 | 19 |
| 1946 | 18 |
| 1947 | 19 |
| 1948 | 15 |
| 1949 | 14 |
| 1950 | 17 |
| 1951 | 29 |
| 1952 | 15 |
| 1953 | 25 |
| 1954 | 10 |
| 1955 | 12 |
| 1956 | 12 |
| 1957 | 11 |
| 1958 | 9 |
| 1959 | 12 |
| 1960 | 22 |
| 1961 | 5 |
| 1962 | 23 |
| 1963 | 26 |
| 1964 | 17 |
| 1965 | 10 |
All-Time Record Progression
5 new records| Date | Kind | Detail |
|---|---|---|
| 1926-07-19 | Record high minimum temperature | Record high minimum temperature 27.2 C (81.0 F) |
| 1934-05-31 | Record high maximum temperature | Record high maximum temperature 41.7 C (107.1 F) |
| 1936-07-14 | Record high maximum temperature | Record high maximum temperature 42.8 C (109.0 F) |
| 1951-12-24 | Record snow depth | Record snow depth 53.3 cm (21.0 in) |
| 1951-12-25 | Record snow depth | Record snow depth 68.6 cm (27.0 in) |
Wettest Day of Each Month
Aug: 144.3 mm (5.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 72.4 mm (2.9 in) | 24 January 1938 |
| Feb | 50.8 mm (2.0 in) | 27 February 1902 |
| Mar | 56.1 mm (2.2 in) | 12 March 1902 |
| Apr | 81.5 mm (3.2 in) | 30 April 1909 |
| May | 78.7 mm (3.1 in) | 31 May 1941 |
| Jun | 82.0 mm (3.2 in) | 3 June 1902 |
| Jul | 123.2 mm (4.9 in) | 2 July 1958 |
| Aug | 144.3 mm (5.7 in) | 23 August 1900 |
| Sep | 94.2 mm (3.7 in) | 29 September 1906 |
| Oct | 128.3 mm (5.1 in) | 10 October 1954 |
| Nov | 86.1 mm (3.4 in) | 17 November 1928 |
| Dec | 70.1 mm (2.8 in) | 29 December 1948 |
Period of Record Coverage
1896 to 1965| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1896 | 214 | 58% | No |
| 1897 | 362 | 99% | Yes |
| 1898 | 364 | 100% | Yes |
| 1899 | 357 | 98% | Yes |
| 1900 | 363 | 99% | Yes |
| 1901 | 365 | 100% | Yes |
| 1902 | 365 | 100% | Yes |
| 1903 | 365 | 100% | Yes |
| 1904 | 362 | 99% | Yes |
| 1905 | 361 | 99% | Yes |
| 1906 | 363 | 99% | Yes |
| 1907 | 360 | 99% | Yes |
| 1908 | 364 | 99% | Yes |
| 1909 | 360 | 99% | Yes |
| 1910 | 364 | 100% | Yes |
| 1911 | 364 | 100% | Yes |
| 1912 | 363 | 99% | Yes |
| 1913 | 360 | 99% | Yes |
| 1914 | 334 | 92% | Yes |
| 1915 | 355 | 97% | Yes |
| 1916 | 365 | 100% | Yes |
| 1917 | 364 | 100% | Yes |
| 1918 | 364 | 100% | Yes |
| 1919 | 363 | 99% | Yes |
| 1920 | 361 | 99% | Yes |
| 1921 | 363 | 99% | Yes |
| 1922 | 363 | 99% | Yes |
| 1923 | 364 | 100% | Yes |
| 1924 | 366 | 100% | Yes |
| 1925 | 365 | 100% | Yes |
| 1926 | 363 | 99% | Yes |
| 1927 | 364 | 100% | Yes |
| 1928 | 363 | 99% | Yes |
| 1929 | 365 | 100% | Yes |
| 1930 | 365 | 100% | Yes |
| 1931 | 353 | 97% | Yes |
| 1932 | 365 | 100% | Yes |
| 1933 | 365 | 100% | Yes |
| 1934 | 365 | 100% | Yes |
| 1935 | 365 | 100% | Yes |
| 1936 | 366 | 100% | Yes |
| 1937 | 365 | 100% | Yes |
| 1938 | 365 | 100% | Yes |
| 1939 | 365 | 100% | Yes |
| 1940 | 366 | 100% | Yes |
| 1941 | 365 | 100% | Yes |
| 1942 | 365 | 100% | Yes |
| 1943 | 364 | 100% | Yes |
| 1944 | 365 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 364 | 100% | Yes |
| 1948 | 365 | 100% | Yes |
| 1949 | 363 | 99% | Yes |
| 1950 | 362 | 99% | Yes |
| 1951 | 361 | 99% | Yes |
| 1952 | 359 | 98% | Yes |
| 1953 | 359 | 98% | Yes |
| 1954 | 362 | 99% | Yes |
| 1955 | 362 | 99% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 362 | 99% | Yes |
| 1958 | 363 | 99% | Yes |
| 1959 | 362 | 99% | Yes |
| 1960 | 336 | 92% | Yes |
| 1961 | 361 | 99% | Yes |
| 1962 | 356 | 98% | Yes |
| 1963 | 356 | 98% | Yes |
| 1964 | 362 | 99% | Yes |
| 1965 | 239 | 65% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 20 September 1965 | Sycamore, US | daily high min (Tie) | 18.9 C (66.0 F) | tie | 40 years | 4 of 100 (Routine) |
| 30 August 1965 | Sycamore, US | monthly low max | 16.1 C (61.0 F) | 0.6 C (1.1 F) | 61 years | 36 of 100 (Notable) |
| 29 August 1965 | Sycamore, US | daily low max | 17.8 C (64.0 F) | 2.2 C (4.0 F) | 19 years | 17 of 100 (Routine) |
| 27 August 1965 | Sycamore, US | daily rain | 55.9 mm (2.2 in) | 16.5 mm (0.6 in) | 62 years | 36 of 100 (Notable) |
| 9 August 1965 | Sycamore, US | daily rain | 40.9 mm (1.6 in) | 4.1 mm (0.16 in) | 19 years | 14 of 100 (Routine) |
| 31 July 1965 | Sycamore, US | daily rain | 52.3 mm (2.1 in) | 4.5 mm (0.18 in) | 40 years | 21 of 100 (Routine) |
| 24 July 1965 | Sycamore, US | daily high min | 24.4 C (75.9 F) | 1.1 C (2.0 F) | 52 years | 24 of 100 (Routine) |
| 23 July 1965 | Sycamore, US | daily high min (Tie) | 23.3 C (73.9 F) | tie | 51 years | 5 of 100 (Routine) |
| 13 July 1965 | Sycamore, US | daily rain | 79.8 mm (3.1 in) | 18.8 mm (0.7 in) | 8 years | 21 of 100 (Routine) |
| 1 July 1965 | Sycamore, US | daily low min | 6.1 C (43.0 F) | 0.6 C (1.1 F) | 63 years | 26 of 100 (Routine) |
| 29 May 1965 | Sycamore, US | daily low min | -0.6 C (30.9 F) | 1.2 C (2.2 F) | 35 years | 19 of 100 (Routine) |
| 25 May 1965 | Sycamore, US | daily high min | 20.0 C (68.0 F) | 3.3 C (5.9 F) | 26 years | 20 of 100 (Routine) |
| 9 May 1965 | Sycamore, US | daily high min (Tie) | 17.2 C (63.0 F) | tie | 31 years | 4 of 100 (Routine) |
| 2 May 1965 | Sycamore, US | daily high min | 15.0 C (59.0 F) | 0.6 C (1.1 F) | 10 years | 11 of 100 (Routine) |
| 28 February 1965 | Sycamore, US | daily high max (Tie) | 12.8 C (55.0 F) | tie | 39 years | 4 of 100 (Routine) |
| 7 February 1965 | Sycamore, US | daily high min (Tie) | 1.7 C (35.1 F) | tie | 37 years | 4 of 100 (Routine) |
| 3 February 1965 | Sycamore, US | daily low min (Tie) | -25.0 C (-13.0 F) | tie | 60 years | 6 of 100 (Routine) |
| 2 February 1965 | Sycamore, US | daily low max | -17.2 C (1.0 F) | 2.2 C (4.0 F) | 60 years | 28 of 100 (Routine) |
| 22 January 1965 | Sycamore, US | daily rain | 29.2 mm (1.1 in) | 3.8 mm (0.15 in) | 8 years | 13 of 100 (Routine) |
| 8 January 1965 | Sycamore, US | daily high max | 13.3 C (55.9 F) | 3.3 C (5.9 F) | 58 years | 29 of 100 (Routine) |
Climate Trend
66 complete years, 1897 to 1964| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1897 | 8.6 C | -0.45 C |
| 1898 | 8.7 C | -0.34 C |
| 1899 | 8.7 C | -0.34 C |
| 1900 | 9.2 C | +0.15 C |
| 1901 | 8.5 C | -0.54 C |
| 1902 | 9.2 C | +0.16 C |
| 1903 | 8.6 C | -0.47 C |
| 1904 | 7.3 C | -1.73 C |
| 1905 | 8.4 C | -0.60 C |
| 1906 | 9.2 C | +0.17 C |
| 1907 | 8.2 C | -0.86 C |
| 1908 | 9.5 C | +0.43 C |
| 1909 | 8.8 C | -0.27 C |
| 1910 | 8.9 C | -0.11 C |
| 1911 | 9.6 C | +0.56 C |
| 1912 | 8.0 C | -1.08 C |
| 1913 | 9.8 C | +0.77 C |
| 1915 | 7.9 C | -1.15 C |
| 1916 | 8.5 C | -0.58 C |
| 1917 | 7.1 C | -1.91 C |
| 1918 | 8.9 C | -0.10 C |
| 1919 | 9.4 C | +0.32 C |
| 1920 | 8.8 C | -0.20 C |
| 1921 | 10.9 C | +1.81 C |
| 1922 | 9.8 C | +0.74 C |
| 1923 | 9.0 C | -0.04 C |
| 1924 | 7.6 C | -1.42 C |
| 1925 | 9.0 C | -0.07 C |
| 1926 | 8.2 C | -0.87 C |
| 1927 | 9.6 C | +0.54 C |
| 1928 | 9.3 C | +0.27 C |
| 1929 | 7.9 C | -1.10 C |
| 1930 | 9.5 C | +0.47 C |
| 1931 | 10.7 C | +1.68 C |
| 1932 | 9.2 C | +0.14 C |
| 1933 | 9.7 C | +0.69 C |
| 1934 | 9.9 C | +0.81 C |
| 1935 | 8.8 C | -0.21 C |
| 1936 | 8.6 C | -0.46 C |
| 1937 | 8.5 C | -0.50 C |
| 1938 | 10.3 C | +1.28 C |
| 1939 | 10.2 C | +1.15 C |
| 1940 | 8.4 C | -0.62 C |
| 1941 | 10.0 C | +0.99 C |
| 1942 | 9.2 C | +0.20 C |
| 1943 | 8.7 C | -0.37 C |
| 1944 | 9.6 C | +0.52 C |
| 1945 | 8.4 C | -0.66 C |
| 1946 | 10.0 C | +1.00 C |
| 1947 | 8.8 C | -0.21 C |
| 1948 | 9.0 C | +0.00 C |
| 1949 | 9.7 C | +0.64 C |
| 1950 | 7.9 C | -1.17 C |
| 1951 | 8.0 C | -1.06 C |
| 1952 | 9.6 C | +0.55 C |
| 1953 | 10.3 C | +1.21 C |
| 1954 | 10.1 C | +1.04 C |
| 1955 | 9.8 C | +0.72 C |
| 1956 | 9.9 C | +0.82 C |
| 1957 | 9.3 C | +0.27 C |
| 1958 | 8.3 C | -0.75 C |
| 1959 | 9.2 C | +0.15 C |
| 1961 | 9.3 C | +0.21 C |
| 1962 | 8.7 C | -0.39 C |
| 1963 | 8.5 C | -0.53 C |
| 1964 | 9.6 C | +0.55 C |
The annual mean temperature here has risen by 0.10 C (0.00 to 0.20) per decade over 1897 to 1964. In Fahrenheit: 0.18 F (0.01 to 0.36) per decade. The slope is a straight line fitted to 66 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.10 C (0.00 to 0.20) per decade | 0.18 F (0.01 to 0.36) per decade | 1897 to 1964 | 66 | Rise |
| Mean daily maximum | 0.09 C (-0.02 to 0.21) per decade | 0.17 F (-0.04 to 0.37) per decade | 1897 to 1964 | 66 | Not clearly different from zero |
| Mean daily minimum | 0.11 C (0.01 to 0.21) per decade | 0.20 F (0.01 to 0.38) per decade | 1897 to 1964 | 66 | 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
1893 to 1965| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 42.8 C (109.0 F) | 1936 | 36.7 C (98.1 F) | 70 |
| Coldest night (TNn) | -32.2 C (-26.0 F) | 1905 | -25.6 C (-14.1 F) | 70 |
| Wettest day (Rx1day) | 144.3 mm (5.7 in) | 1900 | 64.0 mm (2.5 in) | 73 |
| Wettest five days (Rx5day) | 203.0 mm (8.0 in) | 1900 | 92.9 mm (3.7 in) | 73 |
| Longest dry spell (CDD) | 55 days | 1952 | 23 days | 73 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1893 | n/a |
| 1894 | n/a |
| 1895 | n/a |
| 1896 | 35.6 C (96.1 F) |
| 1897 | 35.6 C (96.1 F) |
| 1898 | 35.0 C (95.0 F) |
| 1899 | 37.2 C (99.0 F) |
| 1900 | 34.4 C (93.9 F) |
| 1901 | 41.1 C (106.0 F) |
| 1902 | 34.4 C (93.9 F) |
| 1903 | 36.1 C (97.0 F) |
| 1904 | 35.6 C (96.1 F) |
| 1905 | 36.1 C (97.0 F) |
| 1906 | 36.1 C (97.0 F) |
| 1907 | 35.0 C (95.0 F) |
| 1908 | 37.2 C (99.0 F) |
| 1909 | 38.3 C (100.9 F) |
| 1910 | 40.0 C (104.0 F) |
| 1911 | 41.1 C (106.0 F) |
| 1912 | 36.7 C (98.1 F) |
| 1913 | 38.9 C (102.0 F) |
| 1914 | 37.2 C (99.0 F) |
| 1915 | 31.1 C (88.0 F) |
| 1916 | 40.0 C (104.0 F) |
| 1917 | 37.2 C (99.0 F) |
| 1918 | 40.0 C (104.0 F) |
| 1919 | 37.2 C (99.0 F) |
| 1920 | 37.8 C (100.0 F) |
| 1921 | 37.2 C (99.0 F) |
| 1922 | 37.8 C (100.0 F) |
| 1923 | 36.7 C (98.1 F) |
| 1924 | 33.3 C (91.9 F) |
| 1925 | 37.8 C (100.0 F) |
| 1926 | 35.0 C (95.0 F) |
| 1927 | 36.7 C (98.1 F) |
| 1928 | 33.9 C (93.0 F) |
| 1929 | 34.4 C (93.9 F) |
| 1930 | 38.3 C (100.9 F) |
| 1931 | 37.2 C (99.0 F) |
| 1932 | 36.7 C (98.1 F) |
| 1933 | 37.8 C (100.0 F) |
| 1934 | 41.7 C (107.1 F) |
| 1935 | 36.7 C (98.1 F) |
| 1936 | 42.8 C (109.0 F) |
| 1937 | 36.7 C (98.1 F) |
| 1938 | 34.4 C (93.9 F) |
| 1939 | 38.3 C (100.9 F) |
| 1940 | 40.0 C (104.0 F) |
| 1941 | 37.2 C (99.0 F) |
| 1942 | 36.1 C (97.0 F) |
| 1943 | 35.6 C (96.1 F) |
| 1944 | 37.2 C (99.0 F) |
| 1945 | 36.7 C (98.1 F) |
| 1946 | 37.8 C (100.0 F) |
| 1947 | 37.8 C (100.0 F) |
| 1948 | 35.6 C (96.1 F) |
| 1949 | 37.2 C (99.0 F) |
| 1950 | 33.3 C (91.9 F) |
| 1951 | 32.8 C (91.0 F) |
| 1952 | 36.1 C (97.0 F) |
| 1953 | 38.3 C (100.9 F) |
| 1954 | 36.7 C (98.1 F) |
| 1955 | 38.9 C (102.0 F) |
| 1956 | 38.3 C (100.9 F) |
| 1957 | 35.6 C (96.1 F) |
| 1958 | 33.3 C (91.9 F) |
| 1959 | 35.6 C (96.1 F) |
| 1960 | 35.0 C (95.0 F) |
| 1961 | 35.0 C (95.0 F) |
| 1962 | 35.0 C (95.0 F) |
| 1963 | 36.7 C (98.1 F) |
| 1964 | 35.6 C (96.1 F) |
| 1965 | 35.6 C (96.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1893 | n/a |
| 1894 | n/a |
| 1895 | n/a |
| 1896 | -17.2 C (1.0 F) |
| 1897 | -30.6 C (-23.1 F) |
| 1898 | -22.8 C (-9.0 F) |
| 1899 | -30.6 C (-23.1 F) |
| 1900 | -24.4 C (-11.9 F) |
| 1901 | -25.6 C (-14.1 F) |
| 1902 | -26.1 C (-15.0 F) |
| 1903 | -28.3 C (-18.9 F) |
| 1904 | -28.3 C (-18.9 F) |
| 1905 | -32.2 C (-26.0 F) |
| 1906 | -18.3 C (-0.9 F) |
| 1907 | -25.0 C (-13.0 F) |
| 1908 | -23.9 C (-11.0 F) |
| 1909 | -25.6 C (-14.1 F) |
| 1910 | -26.7 C (-16.1 F) |
| 1911 | -20.6 C (-5.1 F) |
| 1912 | -28.9 C (-20.0 F) |
| 1913 | -22.8 C (-9.0 F) |
| 1914 | -30.0 C (-22.0 F) |
| 1915 | -30.0 C (-22.0 F) |
| 1916 | -26.7 C (-16.1 F) |
| 1917 | -27.2 C (-17.0 F) |
| 1918 | -28.9 C (-20.0 F) |
| 1919 | -30.0 C (-22.0 F) |
| 1920 | -24.4 C (-11.9 F) |
| 1921 | -18.3 C (-0.9 F) |
| 1922 | -24.4 C (-11.9 F) |
| 1923 | -25.0 C (-13.0 F) |
| 1924 | -31.1 C (-24.0 F) |
| 1925 | -25.6 C (-14.1 F) |
| 1926 | -23.9 C (-11.0 F) |
| 1927 | -28.3 C (-18.9 F) |
| 1928 | -23.3 C (-9.9 F) |
| 1929 | -31.7 C (-25.1 F) |
| 1930 | -31.7 C (-25.1 F) |
| 1931 | -20.6 C (-5.1 F) |
| 1932 | -25.6 C (-14.1 F) |
| 1933 | -32.2 C (-26.0 F) |
| 1934 | -23.3 C (-9.9 F) |
| 1935 | -24.4 C (-11.9 F) |
| 1936 | -31.7 C (-25.1 F) |
| 1937 | -20.0 C (-4.0 F) |
| 1938 | -20.0 C (-4.0 F) |
| 1939 | -17.8 C (0.0 F) |
| 1940 | -29.4 C (-20.9 F) |
| 1941 | -22.8 C (-9.0 F) |
| 1942 | -28.3 C (-18.9 F) |
| 1943 | -28.3 C (-18.9 F) |
| 1944 | -25.0 C (-13.0 F) |
| 1945 | -25.6 C (-14.1 F) |
| 1946 | -22.2 C (-8.0 F) |
| 1947 | -23.3 C (-9.9 F) |
| 1948 | -25.6 C (-14.1 F) |
| 1949 | -22.8 C (-9.0 F) |
| 1950 | -27.2 C (-17.0 F) |
| 1951 | -30.0 C (-22.0 F) |
| 1952 | -23.3 C (-9.9 F) |
| 1953 | -22.8 C (-9.0 F) |
| 1954 | -24.4 C (-11.9 F) |
| 1955 | -26.7 C (-16.1 F) |
| 1956 | -20.0 C (-4.0 F) |
| 1957 | -27.8 C (-18.0 F) |
| 1958 | -27.8 C (-18.0 F) |
| 1959 | -26.7 C (-16.1 F) |
| 1960 | -27.2 C (-17.0 F) |
| 1961 | -24.4 C (-11.9 F) |
| 1962 | -27.2 C (-17.0 F) |
| 1963 | -30.6 C (-23.1 F) |
| 1964 | -20.6 C (-5.1 F) |
| 1965 | -28.9 C (-20.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1893 | 52.8 mm (2.1 in) |
| 1894 | 80.3 mm (3.2 in) |
| 1895 | 66.3 mm (2.6 in) |
| 1896 | 68.8 mm (2.7 in) |
| 1897 | 71.9 mm (2.8 in) |
| 1898 | 70.1 mm (2.8 in) |
| 1899 | 67.1 mm (2.6 in) |
| 1900 | 144.3 mm (5.7 in) |
| 1901 | 32.8 mm (1.3 in) |
| 1902 | 82.0 mm (3.2 in) |
| 1903 | 61.0 mm (2.4 in) |
| 1904 | 57.4 mm (2.3 in) |
| 1905 | 77.5 mm (3.1 in) |
| 1906 | 94.2 mm (3.7 in) |
| 1907 | 71.1 mm (2.8 in) |
| 1908 | 52.1 mm (2.1 in) |
| 1909 | 81.5 mm (3.2 in) |
| 1910 | 38.9 mm (1.5 in) |
| 1911 | 44.2 mm (1.7 in) |
| 1912 | 46.7 mm (1.8 in) |
| 1913 | 50.8 mm (2.0 in) |
| 1914 | 63.8 mm (2.5 in) |
| 1915 | 53.1 mm (2.1 in) |
| 1916 | 53.8 mm (2.1 in) |
| 1917 | 55.9 mm (2.2 in) |
| 1918 | 53.3 mm (2.1 in) |
| 1919 | 74.4 mm (2.9 in) |
| 1920 | 43.2 mm (1.7 in) |
| 1921 | 52.3 mm (2.1 in) |
| 1922 | 60.5 mm (2.4 in) |
| 1923 | 61.7 mm (2.4 in) |
| 1924 | 90.9 mm (3.6 in) |
| 1925 | 47.8 mm (1.9 in) |
| 1926 | 58.4 mm (2.3 in) |
| 1927 | 42.4 mm (1.7 in) |
| 1928 | 86.1 mm (3.4 in) |
| 1929 | 61.0 mm (2.4 in) |
| 1930 | 76.5 mm (3.0 in) |
| 1931 | 64.3 mm (2.5 in) |
| 1932 | 66.0 mm (2.6 in) |
| 1933 | 68.6 mm (2.7 in) |
| 1934 | 39.9 mm (1.6 in) |
| 1935 | 79.2 mm (3.1 in) |
| 1936 | 89.2 mm (3.5 in) |
| 1937 | 51.1 mm (2.0 in) |
| 1938 | 72.4 mm (2.9 in) |
| 1939 | 59.2 mm (2.3 in) |
| 1940 | 47.2 mm (1.9 in) |
| 1941 | 78.7 mm (3.1 in) |
| 1942 | 88.9 mm (3.5 in) |
| 1943 | 77.7 mm (3.1 in) |
| 1944 | 52.8 mm (2.1 in) |
| 1945 | 64.0 mm (2.5 in) |
| 1946 | 53.3 mm (2.1 in) |
| 1947 | 75.2 mm (3.0 in) |
| 1948 | 70.1 mm (2.8 in) |
| 1949 | 94.0 mm (3.7 in) |
| 1950 | 64.5 mm (2.5 in) |
| 1951 | 91.4 mm (3.6 in) |
| 1952 | 78.2 mm (3.1 in) |
| 1953 | 54.9 mm (2.2 in) |
| 1954 | 128.3 mm (5.1 in) |
| 1955 | 97.8 mm (3.9 in) |
| 1956 | 61.0 mm (2.4 in) |
| 1957 | 84.3 mm (3.3 in) |
| 1958 | 123.2 mm (4.9 in) |
| 1959 | 64.0 mm (2.5 in) |
| 1960 | 53.3 mm (2.1 in) |
| 1961 | 62.5 mm (2.5 in) |
| 1962 | 32.0 mm (1.3 in) |
| 1963 | 62.2 mm (2.4 in) |
| 1964 | 43.2 mm (1.7 in) |
| 1965 | 79.8 mm (3.1 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1893 | 58.0 mm (2.3 in) |
| 1894 | 125.3 mm (4.9 in) |
| 1895 | 72.1 mm (2.8 in) |
| 1896 | 110.0 mm (4.3 in) |
| 1897 | 86.9 mm (3.4 in) |
| 1898 | 73.7 mm (2.9 in) |
| 1899 | 67.1 mm (2.6 in) |
| 1900 | 203.0 mm (8.0 in) |
| 1901 | 65.3 mm (2.6 in) |
| 1902 | 133.1 mm (5.2 in) |
| 1903 | 84.9 mm (3.3 in) |
| 1904 | 102.4 mm (4.0 in) |
| 1905 | 123.6 mm (4.9 in) |
| 1906 | 110.7 mm (4.4 in) |
| 1907 | 109.5 mm (4.3 in) |
| 1908 | 82.8 mm (3.3 in) |
| 1909 | 123.5 mm (4.9 in) |
| 1910 | 63.3 mm (2.5 in) |
| 1911 | 88.1 mm (3.5 in) |
| 1912 | 85.6 mm (3.4 in) |
| 1913 | 53.8 mm (2.1 in) |
| 1914 | 98.3 mm (3.9 in) |
| 1915 | 87.9 mm (3.5 in) |
| 1916 | 131.7 mm (5.2 in) |
| 1917 | 68.1 mm (2.7 in) |
| 1918 | 95.0 mm (3.7 in) |
| 1919 | 121.7 mm (4.8 in) |
| 1920 | 79.8 mm (3.1 in) |
| 1921 | 63.4 mm (2.5 in) |
| 1922 | 98.6 mm (3.9 in) |
| 1923 | 102.8 mm (4.0 in) |
| 1924 | 131.9 mm (5.2 in) |
| 1925 | 71.7 mm (2.8 in) |
| 1926 | 92.7 mm (3.6 in) |
| 1927 | 106.4 mm (4.2 in) |
| 1928 | 100.1 mm (3.9 in) |
| 1929 | 95.8 mm (3.8 in) |
| 1930 | 96.8 mm (3.8 in) |
| 1931 | 80.8 mm (3.2 in) |
| 1932 | 92.9 mm (3.7 in) |
| 1933 | 69.6 mm (2.7 in) |
| 1934 | 93.3 mm (3.7 in) |
| 1935 | 104.1 mm (4.1 in) |
| 1936 | 176.5 mm (6.9 in) |
| 1937 | 89.7 mm (3.5 in) |
| 1938 | 79.5 mm (3.1 in) |
| 1939 | 79.5 mm (3.1 in) |
| 1940 | 118.2 mm (4.7 in) |
| 1941 | 130.9 mm (5.2 in) |
| 1942 | 105.4 mm (4.1 in) |
| 1943 | 88.7 mm (3.5 in) |
| 1944 | 87.6 mm (3.4 in) |
| 1945 | 100.1 mm (3.9 in) |
| 1946 | 75.9 mm (3.0 in) |
| 1947 | 75.2 mm (3.0 in) |
| 1948 | 70.1 mm (2.8 in) |
| 1949 | 159.3 mm (6.3 in) |
| 1950 | 85.6 mm (3.4 in) |
| 1951 | 139.9 mm (5.5 in) |
| 1952 | 101.1 mm (4.0 in) |
| 1953 | 66.3 mm (2.6 in) |
| 1954 | 133.9 mm (5.3 in) |
| 1955 | 116.7 mm (4.6 in) |
| 1956 | 83.1 mm (3.3 in) |
| 1957 | 84.3 mm (3.3 in) |
| 1958 | 161.3 mm (6.4 in) |
| 1959 | 106.0 mm (4.2 in) |
| 1960 | 87.6 mm (3.4 in) |
| 1961 | 118.5 mm (4.7 in) |
| 1962 | 52.6 mm (2.1 in) |
| 1963 | 124.5 mm (4.9 in) |
| 1964 | 67.8 mm (2.7 in) |
| 1965 | 88.9 mm (3.5 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1893 | 32 days |
| 1894 | 24 days |
| 1895 | 20 days |
| 1896 | 22 days |
| 1897 | 24 days |
| 1898 | 23 days |
| 1899 | 25 days |
| 1900 | 19 days |
| 1901 | 20 days |
| 1902 | 21 days |
| 1903 | 25 days |
| 1904 | 50 days |
| 1905 | 18 days |
| 1906 | 22 days |
| 1907 | 21 days |
| 1908 | 25 days |
| 1909 | 33 days |
| 1910 | 34 days |
| 1911 | 15 days |
| 1912 | 26 days |
| 1913 | 33 days |
| 1914 | 22 days |
| 1915 | 34 days |
| 1916 | 23 days |
| 1917 | 20 days |
| 1918 | 23 days |
| 1919 | 42 days |
| 1920 | 31 days |
| 1921 | 15 days |
| 1922 | 20 days |
| 1923 | 21 days |
| 1924 | 23 days |
| 1925 | 22 days |
| 1926 | 16 days |
| 1927 | 23 days |
| 1928 | 19 days |
| 1929 | 14 days |
| 1930 | 32 days |
| 1931 | 18 days |
| 1932 | 29 days |
| 1933 | 33 days |
| 1934 | 30 days |
| 1935 | 19 days |
| 1936 | 26 days |
| 1937 | 25 days |
| 1938 | 23 days |
| 1939 | 30 days |
| 1940 | 18 days |
| 1941 | 17 days |
| 1942 | 28 days |
| 1943 | 25 days |
| 1944 | 27 days |
| 1945 | 24 days |
| 1946 | 20 days |
| 1947 | 23 days |
| 1948 | 19 days |
| 1949 | 22 days |
| 1950 | 30 days |
| 1951 | 16 days |
| 1952 | 55 days |
| 1953 | 25 days |
| 1954 | 19 days |
| 1955 | 16 days |
| 1956 | 17 days |
| 1957 | 23 days |
| 1958 | 31 days |
| 1959 | 25 days |
| 1960 | 26 days |
| 1961 | 16 days |
| 1962 | 21 days |
| 1963 | 18 days |
| 1964 | 20 days |
| 1965 | 17 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
66 years with a frostAcross 66 years with a frost, the median last spring frost at Sycamore falls on 8 May and the median first autumn frost on 4 October, which leaves a median of 153 days between them.
In 1934 to 1964 the median growing season was 154 days. That is 3 days more than in 1897 to 1927.
Fitted over all years, the growing season changes by +1.0 days per decade at this station.
| Measure | Median, all years | Earliest period (1897 to 1927) | Recent period (1934 to 1964) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 8 May | 8 May | 8 May | no change | -0.6 days per decade |
| First autumn frost | 4 October | 5 October | 3 October | 2 days earlier | +0.4 days per decade |
| Growing days | 153 days | 151 days | 154 days | 3 days more | +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
71 years, 1893 to 1964A day with at least 63.5 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 132.4 mm (5.2 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 63.5 mm (2.5 in) | |
| 5 years | 81.5 mm (3.2 in) | |
| 10 years | 93.6 mm (3.7 in) | |
| 25 years | 109.1 mm (4.3 in) | |
| 50 years | 120.7 mm (4.8 in) | |
| 100 years | 132.4 mm (5.2 in) | Longer than the 71 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, 71 years of values from 1893 to 1964.
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: 144.3 mm (5.7 in) in 1900; 128.3 mm (5.1 in) in 1954; 123.2 mm (4.9 in) in 1958.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Sycamore, at 1955. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1955 ran 0.2 C (0.4 F) higher than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1955 | +0.2 | +0.4 | 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).