Cowles Weather Records (USC00292139)
Record envelope, standing records and threshold days for Cowles (USC00292139), New Mexico, United States, with 71 years of record.
Key Facts for Cowles
- Cowles (USC00292139) is a weather station in New Mexico, United States at 35.82 latitude and -105.67 longitude, 2,471 m (8,107 ft) above sea level.
- The station reports from 1894 to 1964, 71 years of record.
- 1,464 records set at Cowles still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- Cowles set a daily record low minimum temperature of -12.8 C (9.0 F) on 25 October 1964.
About the Station
- Location: New Mexico, United States, 35.82 latitude, -105.67 longitude.
- Elevation: 2,471 m (8,107 ft).
- Period of record: 1894 to 1964, 71 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 | 19.4 C (66.9 F) | -35.6 C (-32.1 F) | n/a | n/a |
| Feb | 18.3 C (64.9 F) | -32.8 C (-27.0 F) | n/a | n/a |
| Mar | 23.3 C (73.9 F) | -28.3 C (-18.9 F) | n/a | n/a |
| Apr | 24.4 C (75.9 F) | -22.8 C (-9.0 F) | n/a | n/a |
| May | 29.4 C (84.9 F) | -12.8 C (9.0 F) | n/a | n/a |
| Jun | 32.2 C (90.0 F) | -12.2 C (10.0 F) | n/a | n/a |
| Jul | 32.2 C (90.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Aug | 31.7 C (89.1 F) | -7.2 C (19.0 F) | n/a | n/a |
| Sep | 30.0 C (86.0 F) | -11.1 C (12.0 F) | n/a | n/a |
| Oct | 26.1 C (79.0 F) | -16.1 C (3.0 F) | n/a | n/a |
| Nov | 25.0 C (77.0 F) | -28.3 C (-18.9 F) | n/a | n/a |
| Dec | 20.6 C (69.1 F) | -29.4 C (-20.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1897 | 26 |
| 1898 | 33 |
| 1899 | 44 |
| 1900 | 26 |
| 1901 | 17 |
| 1902 | 29 |
| 1903 | 25 |
| 1904 | 20 |
| 1905 | 20 |
| 1906 | 30 |
| 1907 | 38 |
| 1908 | 27 |
| 1909 | 31 |
| 1910 | 26 |
| 1911 | 21 |
| 1912 | 47 |
| 1913 | 32 |
| 1914 | 19 |
| 1915 | 25 |
| 1916 | 25 |
| 1917 | 39 |
| 1918 | 41 |
| 1919 | 22 |
| 1920 | 30 |
| 1921 | 28 |
| 1922 | 35 |
| 1923 | 18 |
| 1924 | 23 |
| 1925 | 23 |
| 1926 | 22 |
| 1927 | 32 |
| 1928 | 22 |
| 1929 | 30 |
| 1930 | 23 |
| 1931 | 20 |
| 1932 | 18 |
| 1933 | 33 |
| 1934 | 37 |
| 1935 | 15 |
| 1936 | 33 |
| 1937 | 27 |
| 1938 | 16 |
| 1939 | 11 |
| 1940 | 4 |
| 1941 | 11 |
| 1942 | 11 |
| 1943 | 6 |
| 1944 | 9 |
| 1945 | 4 |
| 1946 | 2 |
| 1948 | 5 |
| 1949 | 8 |
| 1950 | 8 |
| 1954 | 7 |
| 1955 | 23 |
| 1956 | 38 |
| 1957 | 17 |
| 1958 | 32 |
| 1959 | 18 |
| 1960 | 30 |
| 1961 | 20 |
| 1962 | 9 |
| 1963 | 12 |
| 1964 | 31 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1931-09-15 | Record daily precipitation | Record daily precipitation 66.3 mm (2.6 in) |
| 1939-02-10 | Record low maximum temperature | Record low maximum temperature -12.2 C (10.0 F) |
| 1962-07-23 | Record high minimum temperature | Record high minimum temperature 16.1 C (61.0 F) |
| 1963-01-13 | Record low minimum temperature | Record low minimum temperature -35.6 C (-32.1 F) |
Wettest Day of Each Month
Sep: 66.3 mm (2.6 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 31.8 mm (1.3 in) | 8 January 1957 |
| Feb | 35.6 mm (1.4 in) | 7 February 1937 |
| Mar | 39.4 mm (1.6 in) | 21 March 1919 |
| Apr | 51.8 mm (2.0 in) | 15 April 1900 |
| May | 43.2 mm (1.7 in) | 23 May 1919 |
| Jun | 47.0 mm (1.9 in) | 11 June 1913 |
| Jul | 51.1 mm (2.0 in) | 13 July 1908 |
| Aug | 55.9 mm (2.2 in) | 7 August 1932 |
| Sep | 66.3 mm (2.6 in) | 15 September 1931 |
| Oct | 56.9 mm (2.2 in) | 5 October 1911 |
| Nov | 31.2 mm (1.2 in) | 2 November 1911 |
| Dec | 49.5 mm (1.9 in) | 1 December 1933 |
Period of Record Coverage
1897 to 1964| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1897 | 306 | 84% | No |
| 1898 | 365 | 100% | Yes |
| 1899 | 332 | 91% | Yes |
| 1900 | 353 | 97% | Yes |
| 1901 | 222 | 61% | No |
| 1902 | 342 | 94% | Yes |
| 1903 | 350 | 96% | Yes |
| 1904 | 237 | 65% | No |
| 1905 | 293 | 80% | No |
| 1906 | 263 | 72% | No |
| 1907 | 333 | 91% | Yes |
| 1908 | 291 | 80% | No |
| 1909 | 328 | 90% | No |
| 1910 | 259 | 71% | No |
| 1911 | 220 | 60% | No |
| 1912 | 325 | 89% | No |
| 1913 | 358 | 98% | Yes |
| 1914 | 347 | 95% | Yes |
| 1915 | 362 | 99% | Yes |
| 1916 | 356 | 97% | Yes |
| 1917 | 359 | 98% | Yes |
| 1918 | 364 | 100% | Yes |
| 1919 | 365 | 100% | Yes |
| 1920 | 364 | 99% | Yes |
| 1921 | 357 | 98% | Yes |
| 1922 | 365 | 100% | Yes |
| 1923 | 364 | 100% | Yes |
| 1924 | 362 | 99% | Yes |
| 1925 | 364 | 100% | Yes |
| 1926 | 363 | 99% | Yes |
| 1927 | 348 | 95% | Yes |
| 1928 | 360 | 98% | Yes |
| 1929 | 358 | 98% | Yes |
| 1930 | 353 | 97% | Yes |
| 1931 | 364 | 100% | Yes |
| 1932 | 361 | 99% | Yes |
| 1933 | 364 | 100% | Yes |
| 1934 | 358 | 98% | Yes |
| 1935 | 364 | 100% | Yes |
| 1936 | 364 | 99% | Yes |
| 1937 | 362 | 99% | Yes |
| 1938 | 334 | 92% | Yes |
| 1939 | 279 | 76% | No |
| 1940 | 218 | 60% | No |
| 1941 | 239 | 65% | No |
| 1942 | 231 | 63% | No |
| 1943 | 102 | 28% | No |
| 1944 | 141 | 39% | No |
| 1945 | 228 | 62% | No |
| 1946 | 92 | 25% | No |
| 1948 | 48 | 13% | No |
| 1949 | 93 | 25% | No |
| 1950 | 26 | 7% | No |
| 1954 | 209 | 57% | No |
| 1955 | 363 | 99% | Yes |
| 1956 | 365 | 100% | Yes |
| 1957 | 361 | 99% | Yes |
| 1958 | 365 | 100% | Yes |
| 1959 | 361 | 99% | Yes |
| 1960 | 361 | 99% | Yes |
| 1961 | 292 | 80% | No |
| 1962 | 138 | 38% | No |
| 1963 | 120 | 33% | No |
| 1964 | 296 | 81% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 25 October 1964 | Cowles, US | daily low min | -12.8 C (9.0 F) | 0.6 C (1.1 F) | 65 years | 26 of 100 (Routine) |
| 19 October 1964 | Cowles, US | daily low min (Tie) | -7.8 C (18.0 F) | tie | 66 years | 6 of 100 (Routine) |
| 18 October 1964 | Cowles, US | daily low min | -7.2 C (19.0 F) | 0.5 C (0.9 F) | 66 years | 27 of 100 (Routine) |
| 14 October 1964 | Cowles, US | daily low min | -8.3 C (17.1 F) | 0.5 C (0.9 F) | 52 years | 22 of 100 (Routine) |
| 13 October 1964 | Cowles, US | daily low min | -7.2 C (19.0 F) | 0.5 C (0.9 F) | 5 years | 8 of 100 (Routine) |
| 29 September 1964 | Cowles, US | daily low min (Tie) | -7.8 C (18.0 F) | tie | 28 years | 3 of 100 (Routine) |
| 28 September 1964 | Cowles, US | daily low min | -8.3 C (17.1 F) | 1.1 C (2.0 F) | 56 years | 25 of 100 (Routine) |
| 20 September 1964 | Cowles, US | daily low max | 13.3 C (55.9 F) | 2.3 C (4.1 F) | 33 years | 21 of 100 (Routine) |
| 19 September 1964 | Cowles, US | daily low max | 13.9 C (57.0 F) | 1.1 C (2.0 F) | 25 years | 16 of 100 (Routine) |
| 11 September 1964 | Cowles, US | daily rain | 36.6 mm (1.4 in) | 13.7 mm (0.5 in) | 22 years | 28 of 100 (Routine) |
| 28 August 1964 | Cowles, US | daily low min | -3.9 C (25.0 F) | 2.2 C (4.0 F) | 44 years | 27 of 100 (Routine) |
| 26 August 1964 | Cowles, US | daily low min | -1.7 C (28.9 F) | 1.7 C (3.1 F) | 64 years | 31 of 100 (Routine) |
| 24 August 1964 | Cowles, US | daily low min | 0.0 C (32.0 F) | 0.6 C (1.1 F) | 66 years | 28 of 100 (Routine) |
| 22 August 1964 | Cowles, US | daily low min (Tie) | 0.0 C (32.0 F) | tie | 8 years | 2 of 100 (Routine) |
| 21 August 1964 | Cowles, US | daily low min | -2.2 C (28.0 F) | 2.2 C (4.0 F) | 7 years | 16 of 100 (Routine) |
| 1 August 1964 | Cowles, US | daily low max | 16.1 C (61.0 F) | 1.7 C (3.1 F) | 8 years | 14 of 100 (Routine) |
| 25 July 1964 | Cowles, US | daily high min | 11.1 C (52.0 F) | 1.1 C (2.0 F) | 49 years | 24 of 100 (Routine) |
| 22 July 1964 | Cowles, US | daily rain | 35.6 mm (1.4 in) | 3.6 mm (0.14 in) | 34 years | 21 of 100 (Routine) |
| 12 July 1964 | Cowles, US | daily low max | 16.7 C (62.1 F) | 2.7 C (4.9 F) | 48 years | 29 of 100 (Routine) |
| 9 July 1964 | Cowles, US | daily high min (Tie) | 10.6 C (51.1 F) | tie | 51 years | 5 of 100 (Routine) |
Climate Trend
31 complete years, 1898 to 1960| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1898 | 4.8 C | -0.69 C |
| 1900 | 6.4 C | +0.86 C |
| 1903 | 4.8 C | -0.68 C |
| 1913 | 5.2 C | -0.31 C |
| 1914 | 5.5 C | -0.04 C |
| 1915 | 4.7 C | -0.78 C |
| 1916 | 5.7 C | +0.17 C |
| 1917 | 5.8 C | +0.26 C |
| 1918 | 5.4 C | -0.07 C |
| 1919 | 4.9 C | -0.56 C |
| 1920 | 4.7 C | -0.81 C |
| 1921 | 6.4 C | +0.88 C |
| 1922 | 6.3 C | +0.84 C |
| 1923 | 6.1 C | +0.55 C |
| 1924 | 5.8 C | +0.28 C |
| 1925 | 6.4 C | +0.91 C |
| 1926 | 5.9 C | +0.36 C |
| 1927 | 6.7 C | +1.24 C |
| 1929 | 5.5 C | +0.00 C |
| 1930 | 5.8 C | +0.31 C |
| 1931 | 6.3 C | +0.76 C |
| 1932 | 5.7 C | +0.20 C |
| 1933 | 6.5 C | +1.01 C |
| 1935 | 6.1 C | +0.60 C |
| 1936 | 6.6 C | +1.09 C |
| 1955 | 4.5 C | -0.98 C |
| 1956 | 4.9 C | -0.57 C |
| 1957 | 4.1 C | -1.38 C |
| 1958 | 4.3 C | -1.23 C |
| 1959 | 4.7 C | -0.76 C |
| 1960 | 4.0 C | -1.55 C |
The annual mean temperature here has fallen by 0.17 C (0.01 to 0.33) per decade over 1898 to 1960. In Fahrenheit: 0.31 F (0.02 to 0.60) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.17 C (-0.33 to -0.01) per decade | -0.31 F (-0.60 to -0.02) per decade | 1898 to 1960 | 31 | Fall |
| Mean daily maximum | 0.1 C (-0.1 to 0.3) per decade | 0.1 F (-0.2 to 0.5) per decade | 1898 to 1960 | 31 | Not clearly different from zero |
| Mean daily minimum | -0.4 C (-0.7 to -0.2) per decade | -0.8 F (-1.2 to -0.3) per decade | 1898 to 1960 | 31 | Fall |
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 1964| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 32.2 C (90.0 F) | 1909 | 30.0 C (86.0 F) | 64 |
| Coldest night (TNn) | -35.6 C (-32.1 F) | 1963 | -24.4 C (-11.9 F) | 64 |
| Wettest day (Rx1day) | 66.3 mm (2.6 in) | 1931 | 34.3 mm (1.4 in) | 67 |
| Wettest five days (Rx5day) | 125.5 mm (4.9 in) | 1931 | 58.9 mm (2.3 in) | 67 |
| Longest dry spell (CDD) | 82 days | 1903 | 28 days | 67 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1894 | n/a |
| 1895 | n/a |
| 1896 | n/a |
| 1897 | 29.4 C (84.9 F) |
| 1898 | 30.0 C (86.0 F) |
| 1899 | 30.0 C (86.0 F) |
| 1900 | 31.1 C (88.0 F) |
| 1901 | 30.0 C (86.0 F) |
| 1902 | 31.7 C (89.1 F) |
| 1903 | 30.6 C (87.1 F) |
| 1904 | 28.3 C (82.9 F) |
| 1905 | 28.9 C (84.0 F) |
| 1906 | 30.0 C (86.0 F) |
| 1907 | 30.0 C (86.0 F) |
| 1908 | 26.7 C (80.1 F) |
| 1909 | 32.2 C (90.0 F) |
| 1910 | 30.0 C (86.0 F) |
| 1911 | 27.2 C (81.0 F) |
| 1912 | 27.8 C (82.0 F) |
| 1913 | 27.8 C (82.0 F) |
| 1914 | 27.2 C (81.0 F) |
| 1915 | 27.8 C (82.0 F) |
| 1916 | 28.3 C (82.9 F) |
| 1917 | 29.4 C (84.9 F) |
| 1918 | 29.4 C (84.9 F) |
| 1919 | 26.7 C (80.1 F) |
| 1920 | 27.8 C (82.0 F) |
| 1921 | 28.9 C (84.0 F) |
| 1922 | 31.1 C (88.0 F) |
| 1923 | 31.1 C (88.0 F) |
| 1924 | 31.7 C (89.1 F) |
| 1925 | 30.6 C (87.1 F) |
| 1926 | 30.0 C (86.0 F) |
| 1927 | 31.7 C (89.1 F) |
| 1928 | 30.0 C (86.0 F) |
| 1929 | 29.4 C (84.9 F) |
| 1930 | 30.6 C (87.1 F) |
| 1931 | 30.6 C (87.1 F) |
| 1932 | 29.4 C (84.9 F) |
| 1933 | 30.6 C (87.1 F) |
| 1934 | 31.7 C (89.1 F) |
| 1935 | 29.4 C (84.9 F) |
| 1936 | 31.1 C (88.0 F) |
| 1937 | 31.1 C (88.0 F) |
| 1938 | 30.0 C (86.0 F) |
| 1939 | 32.2 C (90.0 F) |
| 1940 | 31.1 C (88.0 F) |
| 1941 | 30.0 C (86.0 F) |
| 1942 | 31.7 C (89.1 F) |
| 1943 | 29.4 C (84.9 F) |
| 1944 | 29.4 C (84.9 F) |
| 1945 | 27.8 C (82.0 F) |
| 1946 | 30.0 C (86.0 F) |
| 1948 | 15.0 C (59.0 F) |
| 1949 | 26.1 C (79.0 F) |
| 1950 | 15.6 C (60.1 F) |
| 1954 | 31.1 C (88.0 F) |
| 1955 | 30.0 C (86.0 F) |
| 1956 | 30.6 C (87.1 F) |
| 1957 | 32.2 C (90.0 F) |
| 1958 | 31.1 C (88.0 F) |
| 1959 | 30.0 C (86.0 F) |
| 1960 | 30.0 C (86.0 F) |
| 1961 | 32.2 C (90.0 F) |
| 1962 | 29.4 C (84.9 F) |
| 1963 | 21.1 C (70.0 F) |
| 1964 | 30.0 C (86.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1894 | n/a |
| 1895 | n/a |
| 1896 | n/a |
| 1897 | -23.9 C (-11.0 F) |
| 1898 | -25.6 C (-14.1 F) |
| 1899 | -32.8 C (-27.0 F) |
| 1900 | -22.8 C (-9.0 F) |
| 1901 | -25.0 C (-13.0 F) |
| 1902 | -22.2 C (-8.0 F) |
| 1903 | -27.8 C (-18.0 F) |
| 1904 | -22.8 C (-9.0 F) |
| 1905 | -23.9 C (-11.0 F) |
| 1906 | -26.7 C (-16.1 F) |
| 1907 | -20.0 C (-4.0 F) |
| 1908 | -22.2 C (-8.0 F) |
| 1909 | -27.8 C (-18.0 F) |
| 1910 | -28.3 C (-18.9 F) |
| 1911 | -26.1 C (-15.0 F) |
| 1912 | -20.0 C (-4.0 F) |
| 1913 | -26.7 C (-16.1 F) |
| 1914 | -20.6 C (-5.1 F) |
| 1915 | -21.7 C (-7.1 F) |
| 1916 | -22.2 C (-8.0 F) |
| 1917 | -22.8 C (-9.0 F) |
| 1918 | -24.4 C (-11.9 F) |
| 1919 | -27.2 C (-17.0 F) |
| 1920 | -23.3 C (-9.9 F) |
| 1921 | -17.8 C (0.0 F) |
| 1922 | -23.3 C (-9.9 F) |
| 1923 | -25.0 C (-13.0 F) |
| 1924 | -27.2 C (-17.0 F) |
| 1925 | -26.7 C (-16.1 F) |
| 1926 | -23.9 C (-11.0 F) |
| 1927 | -22.2 C (-8.0 F) |
| 1928 | -21.7 C (-7.1 F) |
| 1929 | -26.1 C (-15.0 F) |
| 1930 | -27.8 C (-18.0 F) |
| 1931 | -24.4 C (-11.9 F) |
| 1932 | -22.2 C (-8.0 F) |
| 1933 | -31.7 C (-25.1 F) |
| 1934 | -24.4 C (-11.9 F) |
| 1935 | -25.6 C (-14.1 F) |
| 1936 | -21.7 C (-7.1 F) |
| 1937 | -28.9 C (-20.0 F) |
| 1938 | -23.3 C (-9.9 F) |
| 1939 | -26.7 C (-16.1 F) |
| 1940 | -15.0 C (5.0 F) |
| 1941 | -15.6 C (3.9 F) |
| 1942 | -12.8 C (9.0 F) |
| 1943 | -3.9 C (25.0 F) |
| 1944 | -5.6 C (21.9 F) |
| 1945 | -20.0 C (-4.0 F) |
| 1946 | -6.7 C (19.9 F) |
| 1948 | -18.9 C (-2.0 F) |
| 1949 | -28.9 C (-20.0 F) |
| 1950 | -14.4 C (6.1 F) |
| 1954 | -21.1 C (-6.0 F) |
| 1955 | -28.9 C (-20.0 F) |
| 1956 | -24.4 C (-11.9 F) |
| 1957 | -28.3 C (-18.9 F) |
| 1958 | -29.4 C (-20.9 F) |
| 1959 | -26.7 C (-16.1 F) |
| 1960 | -29.4 C (-20.9 F) |
| 1961 | -28.9 C (-20.0 F) |
| 1962 | -25.0 C (-13.0 F) |
| 1963 | -35.6 C (-32.1 F) |
| 1964 | -29.4 C (-20.9 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1894 | 24.4 mm (1.0 in) |
| 1895 | 24.4 mm (1.0 in) |
| 1896 | 35.1 mm (1.4 in) |
| 1897 | 42.9 mm (1.7 in) |
| 1898 | 31.2 mm (1.2 in) |
| 1899 | 28.4 mm (1.1 in) |
| 1900 | 51.8 mm (2.0 in) |
| 1901 | 54.9 mm (2.2 in) |
| 1902 | 29.2 mm (1.1 in) |
| 1903 | 34.3 mm (1.4 in) |
| 1904 | 19.8 mm (0.8 in) |
| 1905 | 44.5 mm (1.8 in) |
| 1906 | 25.1 mm (1.0 in) |
| 1907 | 35.6 mm (1.4 in) |
| 1908 | 51.1 mm (2.0 in) |
| 1909 | 32.0 mm (1.3 in) |
| 1910 | 22.6 mm (0.9 in) |
| 1911 | 56.9 mm (2.2 in) |
| 1912 | 33.0 mm (1.3 in) |
| 1913 | 47.0 mm (1.9 in) |
| 1914 | 36.6 mm (1.4 in) |
| 1915 | 48.3 mm (1.9 in) |
| 1916 | 27.9 mm (1.1 in) |
| 1917 | 27.4 mm (1.1 in) |
| 1918 | 23.1 mm (0.9 in) |
| 1919 | 43.2 mm (1.7 in) |
| 1920 | 34.3 mm (1.4 in) |
| 1921 | 42.2 mm (1.7 in) |
| 1922 | 30.0 mm (1.2 in) |
| 1923 | 29.0 mm (1.1 in) |
| 1924 | 30.5 mm (1.2 in) |
| 1925 | 32.5 mm (1.3 in) |
| 1926 | 45.7 mm (1.8 in) |
| 1927 | 46.2 mm (1.8 in) |
| 1928 | 31.5 mm (1.2 in) |
| 1929 | 38.4 mm (1.5 in) |
| 1930 | 50.3 mm (2.0 in) |
| 1931 | 66.3 mm (2.6 in) |
| 1932 | 55.9 mm (2.2 in) |
| 1933 | 49.5 mm (1.9 in) |
| 1934 | 42.7 mm (1.7 in) |
| 1935 | 35.1 mm (1.4 in) |
| 1936 | 45.7 mm (1.8 in) |
| 1937 | 35.6 mm (1.4 in) |
| 1938 | 31.8 mm (1.3 in) |
| 1939 | 31.8 mm (1.3 in) |
| 1940 | 50.8 mm (2.0 in) |
| 1941 | 38.1 mm (1.5 in) |
| 1942 | 44.5 mm (1.8 in) |
| 1943 | 32.0 mm (1.3 in) |
| 1944 | 48.3 mm (1.9 in) |
| 1945 | 31.2 mm (1.2 in) |
| 1946 | 14.5 mm (0.6 in) |
| 1948 | 15.2 mm (0.6 in) |
| 1949 | 14.0 mm (0.6 in) |
| 1950 | 22.4 mm (0.9 in) |
| 1954 | 26.7 mm (1.1 in) |
| 1955 | 36.8 mm (1.4 in) |
| 1956 | 24.9 mm (1.0 in) |
| 1957 | 50.8 mm (2.0 in) |
| 1958 | 20.3 mm (0.8 in) |
| 1959 | 51.3 mm (2.0 in) |
| 1960 | 47.0 mm (1.9 in) |
| 1961 | 31.8 mm (1.3 in) |
| 1962 | 20.3 mm (0.8 in) |
| 1963 | 23.9 mm (0.9 in) |
| 1964 | 36.6 mm (1.4 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1894 | 60.7 mm (2.4 in) |
| 1895 | 52.4 mm (2.1 in) |
| 1896 | 83.0 mm (3.3 in) |
| 1897 | 57.3 mm (2.3 in) |
| 1898 | 57.7 mm (2.3 in) |
| 1899 | 49.8 mm (2.0 in) |
| 1900 | 67.5 mm (2.7 in) |
| 1901 | 55.8 mm (2.2 in) |
| 1902 | 47.2 mm (1.9 in) |
| 1903 | 61.0 mm (2.4 in) |
| 1904 | 45.5 mm (1.8 in) |
| 1905 | 55.4 mm (2.2 in) |
| 1906 | 51.5 mm (2.0 in) |
| 1907 | 75.9 mm (3.0 in) |
| 1908 | 100.6 mm (4.0 in) |
| 1909 | 51.6 mm (2.0 in) |
| 1910 | 51.6 mm (2.0 in) |
| 1911 | 82.1 mm (3.2 in) |
| 1912 | 50.7 mm (2.0 in) |
| 1913 | 68.6 mm (2.7 in) |
| 1914 | 86.4 mm (3.4 in) |
| 1915 | 85.7 mm (3.4 in) |
| 1916 | 81.0 mm (3.2 in) |
| 1917 | 72.4 mm (2.9 in) |
| 1918 | 40.9 mm (1.6 in) |
| 1919 | 75.8 mm (3.0 in) |
| 1920 | 68.3 mm (2.7 in) |
| 1921 | 79.8 mm (3.1 in) |
| 1922 | 36.8 mm (1.4 in) |
| 1923 | 35.4 mm (1.4 in) |
| 1924 | 55.9 mm (2.2 in) |
| 1925 | 64.0 mm (2.5 in) |
| 1926 | 70.3 mm (2.8 in) |
| 1927 | 58.9 mm (2.3 in) |
| 1928 | 54.1 mm (2.1 in) |
| 1929 | 92.0 mm (3.6 in) |
| 1930 | 87.0 mm (3.4 in) |
| 1931 | 125.5 mm (4.9 in) |
| 1932 | 60.2 mm (2.4 in) |
| 1933 | 77.0 mm (3.0 in) |
| 1934 | 54.9 mm (2.2 in) |
| 1935 | 47.5 mm (1.9 in) |
| 1936 | 73.6 mm (2.9 in) |
| 1937 | 62.2 mm (2.4 in) |
| 1938 | 58.7 mm (2.3 in) |
| 1939 | 77.2 mm (3.0 in) |
| 1940 | 101.7 mm (4.0 in) |
| 1941 | 68.5 mm (2.7 in) |
| 1942 | 61.0 mm (2.4 in) |
| 1943 | 38.3 mm (1.5 in) |
| 1944 | 78.1 mm (3.1 in) |
| 1945 | 46.8 mm (1.8 in) |
| 1946 | 30.0 mm (1.2 in) |
| 1948 | 21.5 mm (0.8 in) |
| 1949 | 20.3 mm (0.8 in) |
| 1950 | 37.2 mm (1.5 in) |
| 1954 | 49.6 mm (2.0 in) |
| 1955 | 58.7 mm (2.3 in) |
| 1956 | 39.6 mm (1.6 in) |
| 1957 | 100.6 mm (4.0 in) |
| 1958 | 52.5 mm (2.1 in) |
| 1959 | 67.0 mm (2.6 in) |
| 1960 | 67.6 mm (2.7 in) |
| 1961 | 49.9 mm (2.0 in) |
| 1962 | 40.4 mm (1.6 in) |
| 1963 | 42.2 mm (1.7 in) |
| 1964 | 72.1 mm (2.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1894 | 21 days |
| 1895 | 22 days |
| 1896 | 24 days |
| 1897 | 18 days |
| 1898 | 33 days |
| 1899 | 26 days |
| 1900 | 25 days |
| 1901 | 28 days |
| 1902 | 27 days |
| 1903 | 82 days |
| 1904 | 25 days |
| 1905 | 24 days |
| 1906 | 30 days |
| 1907 | 27 days |
| 1908 | 31 days |
| 1909 | 24 days |
| 1910 | 27 days |
| 1911 | 17 days |
| 1912 | 33 days |
| 1913 | 32 days |
| 1914 | 37 days |
| 1915 | 32 days |
| 1916 | 52 days |
| 1917 | 50 days |
| 1918 | 28 days |
| 1919 | 26 days |
| 1920 | 30 days |
| 1921 | 33 days |
| 1922 | 25 days |
| 1923 | 31 days |
| 1924 | 31 days |
| 1925 | 32 days |
| 1926 | 26 days |
| 1927 | 33 days |
| 1928 | 33 days |
| 1929 | 27 days |
| 1930 | 29 days |
| 1931 | 20 days |
| 1932 | 44 days |
| 1933 | 22 days |
| 1934 | 25 days |
| 1935 | 24 days |
| 1936 | 28 days |
| 1937 | 75 days |
| 1938 | 59 days |
| 1939 | 31 days |
| 1940 | 38 days |
| 1941 | 17 days |
| 1942 | 61 days |
| 1943 | 13 days |
| 1944 | 22 days |
| 1945 | 38 days |
| 1946 | 31 days |
| 1948 | 17 days |
| 1949 | 28 days |
| 1950 | 22 days |
| 1954 | 35 days |
| 1955 | 36 days |
| 1956 | 42 days |
| 1957 | 20 days |
| 1958 | 31 days |
| 1959 | 34 days |
| 1960 | 45 days |
| 1961 | 44 days |
| 1962 | 24 days |
| 1963 | 20 days |
| 1964 | 28 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
31 years with a frostAcross 31 years with a frost, the median last spring frost at Cowles falls on 15 June and the median first autumn frost on 7 September, which leaves a median of 79 days between them.
Fitted over all years, the growing season changes by -7.6 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1900 to 1960) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 15 June | n/a | 15 June | n/a | +2.7 days per decade |
| First autumn frost | 7 September | n/a | 8 September | n/a | -4.9 days per decade |
| Growing days | 79 days | n/a | 79 days | n/a | -7.6 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
39 years, 1897 to 1960A day with at least 36.7 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 69.7 mm (2.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 36.7 mm (1.4 in) | |
| 5 years | 46.6 mm (1.8 in) | |
| 10 years | 52.6 mm (2.1 in) | |
| 25 years | 59.9 mm (2.4 in) | |
| 50 years | 65.0 mm (2.6 in) | Longer than the 39 years of record |
| 100 years | 69.7 mm (2.7 in) | Longer than the 39 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, 39 years of values from 1897 to 1960.
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: 66.3 mm (2.6 in) in 1931; 56.9 mm (2.2 in) in 1911; 55.9 mm (2.2 in) in 1932.
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).