St Louis St Louis UNIV Weather Records (USC00237465)
Record envelope, standing records and threshold days for St Louis St Louis UNIV (USC00237465), Missouri, United States, with 63 years of record.
Key Facts for St Louis St Louis UNIV
- St Louis St Louis UNIV (USC00237465) is a weather station in Missouri, United States at 38.63 latitude and -90.23 longitude, 171 m (561 ft) above sea level.
- The station reports from 1911 to 1973, 63 years of record.
- 1,464 records set at St Louis St Louis UNIV still stand.
- Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
- St Louis St Louis UNIV tied a daily record high minimum temperature of 18.3 C (64.9 F) on 21 April 1973.
About the Station
- Location: Missouri, United States, 38.63 latitude, -90.23 longitude.
- Elevation: 171 m (561 ft).
- Period of record: 1911 to 1973, 63 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 | 23.9 C (75.0 F) | -27.8 C (-18.0 F) | n/a | n/a |
| Feb | 28.3 C (82.9 F) | -23.9 C (-11.0 F) | n/a | n/a |
| Mar | 33.9 C (93.0 F) | -17.8 C (0.0 F) | n/a | n/a |
| Apr | 33.9 C (93.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| May | 36.1 C (97.0 F) | -1.1 C (30.0 F) | n/a | n/a |
| Jun | 40.0 C (104.0 F) | 6.1 C (43.0 F) | n/a | n/a |
| Jul | 45.0 C (113.0 F) | 11.7 C (53.1 F) | n/a | n/a |
| Aug | 42.8 C (109.0 F) | 8.9 C (48.0 F) | n/a | n/a |
| Sep | 39.4 C (102.9 F) | 3.3 C (37.9 F) | n/a | n/a |
| Oct | 33.9 C (93.0 F) | -5.6 C (21.9 F) | n/a | n/a |
| Nov | 31.7 C (89.1 F) | -16.7 C (1.9 F) | n/a | n/a |
| Dec | 23.9 C (75.0 F) | -22.8 C (-9.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1911 | 8 |
| 1912 | 20 |
| 1913 | 3 |
| 1914 | 22 |
| 1915 | 29 |
| 1916 | 23 |
| 1917 | 39 |
| 1918 | 44 |
| 1919 | 8 |
| 1920 | 27 |
| 1921 | 21 |
| 1922 | 8 |
| 1923 | 21 |
| 1924 | 39 |
| 1925 | 46 |
| 1926 | 18 |
| 1927 | 26 |
| 1928 | 27 |
| 1929 | 30 |
| 1930 | 37 |
| 1931 | 26 |
| 1932 | 32 |
| 1933 | 22 |
| 1934 | 50 |
| 1935 | 21 |
| 1936 | 75 |
| 1937 | 15 |
| 1938 | 23 |
| 1939 | 31 |
| 1940 | 33 |
| 1941 | 16 |
| 1942 | 21 |
| 1943 | 28 |
| 1944 | 21 |
| 1945 | 22 |
| 1946 | 14 |
| 1947 | 15 |
| 1948 | 19 |
| 1949 | 21 |
| 1950 | 33 |
| 1951 | 24 |
| 1952 | 30 |
| 1953 | 35 |
| 1954 | 33 |
| 1955 | 25 |
| 1956 | 18 |
| 1957 | 6 |
| 1958 | 8 |
| 1959 | 17 |
| 1960 | 17 |
| 1961 | 14 |
| 1962 | 26 |
| 1963 | 35 |
| 1964 | 17 |
| 1965 | 22 |
| 1966 | 17 |
| 1967 | 23 |
| 1968 | 16 |
| 1969 | 16 |
| 1970 | 14 |
| 1972 | 15 |
| 1973 | 2 |
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 1954-07-14 | Record high maximum temperature | Record high maximum temperature 45.0 C (113.0 F) |
Wettest Day of Each Month
Aug: 208.3 mm (8.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 69.6 mm (2.7 in) | 30 January 1916 |
| Feb | 77.5 mm (3.1 in) | 26 February 1957 |
| Mar | 89.2 mm (3.5 in) | 31 March 1927 |
| Apr | 187.7 mm (7.4 in) | 22 April 1944 |
| May | 104.1 mm (4.1 in) | 8 May 1961 |
| Jun | 165.1 mm (6.5 in) | 15 June 1957 |
| Jul | 179.3 mm (7.1 in) | 9 July 1942 |
| Aug | 208.3 mm (8.2 in) | 20 August 1915 |
| Sep | 96.0 mm (3.8 in) | 13 September 1945 |
| Oct | 83.3 mm (3.3 in) | 24 October 1947 |
| Nov | 82.3 mm (3.2 in) | 18 November 1921 |
| Dec | 79.2 mm (3.1 in) | 18 December 1924 |
Period of Record Coverage
1911 to 1973| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1911 | 153 | 42% | No |
| 1912 | 304 | 83% | No |
| 1913 | 31 | 8% | No |
| 1914 | 237 | 65% | No |
| 1915 | 365 | 100% | Yes |
| 1916 | 331 | 90% | Yes |
| 1917 | 363 | 99% | Yes |
| 1918 | 364 | 100% | Yes |
| 1919 | 362 | 99% | Yes |
| 1920 | 364 | 99% | Yes |
| 1921 | 358 | 98% | Yes |
| 1922 | 363 | 99% | Yes |
| 1923 | 363 | 99% | Yes |
| 1924 | 361 | 99% | Yes |
| 1925 | 361 | 99% | Yes |
| 1926 | 362 | 99% | Yes |
| 1927 | 359 | 98% | Yes |
| 1928 | 365 | 100% | Yes |
| 1929 | 354 | 97% | Yes |
| 1930 | 363 | 99% | Yes |
| 1931 | 365 | 100% | 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 | 366 | 100% | Yes |
| 1945 | 365 | 100% | Yes |
| 1946 | 365 | 100% | Yes |
| 1947 | 365 | 100% | Yes |
| 1948 | 365 | 100% | Yes |
| 1949 | 363 | 99% | Yes |
| 1950 | 365 | 100% | Yes |
| 1951 | 365 | 100% | Yes |
| 1952 | 366 | 100% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 335 | 92% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 333 | 91% | Yes |
| 1959 | 364 | 100% | Yes |
| 1960 | 360 | 98% | Yes |
| 1961 | 360 | 99% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 364 | 100% | Yes |
| 1964 | 334 | 91% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 331 | 91% | Yes |
| 1967 | 272 | 75% | No |
| 1968 | 200 | 55% | No |
| 1969 | 133 | 36% | No |
| 1970 | 302 | 83% | No |
| 1972 | 224 | 61% | No |
| 1973 | 26 | 7% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 21 April 1973 | St Louis St Louis UNIV, US | daily high min (Tie) | 18.3 C (64.9 F) | tie | 12 years | 2 of 100 (Routine) |
| 11 April 1973 | St Louis St Louis UNIV, US | daily low min | -1.7 C (28.9 F) | 0.6 C (1.1 F) | 32 years | 16 of 100 (Routine) |
| 10 April 1973 | St Louis St Louis UNIV, US | daily low min | -2.2 C (28.0 F) | 1.1 C (2.0 F) | 55 years | 24 of 100 (Routine) |
| 30 December 1972 | St Louis St Louis UNIV, US | daily rain | 24.1 mm (0.9 in) | 3.0 mm (0.12 in) | 40 years | 20 of 100 (Routine) |
| 13 December 1972 | St Louis St Louis UNIV, US | daily rain | 30.5 mm (1.2 in) | 2.8 mm (0.11 in) | 45 years | 21 of 100 (Routine) |
| 6 December 1972 | St Louis St Louis UNIV, US | daily rain | 32.8 mm (1.3 in) | 1.0 mm (0.04 in) | 12 years | 10 of 100 (Routine) |
| 26 September 1972 | St Louis St Louis UNIV, US | daily high min (Tie) | 21.7 C (71.1 F) | tie | 57 years | 5 of 100 (Routine) |
| 19 September 1972 | St Louis St Louis UNIV, US | daily high max | 37.8 C (100.0 F) | 1.7 C (3.1 F) | 47 years | 23 of 100 (Routine) |
| 19 September 1972 | St Louis St Louis UNIV, US | daily high min | 25.0 C (77.0 F) | 1.1 C (2.0 F) | 47 years | 22 of 100 (Routine) |
| 18 September 1972 | St Louis St Louis UNIV, US | daily high max | 36.7 C (98.1 F) | 0.6 C (1.1 F) | 47 years | 21 of 100 (Routine) |
| 22 August 1972 | St Louis St Louis UNIV, US | daily rain | 42.2 mm (1.7 in) | 27.7 mm (1.1 in) | 50 years | 35 of 100 (Notable) |
| 8 August 1972 | St Louis St Louis UNIV, US | daily low min | 15.0 C (59.0 F) | 1.7 C (3.1 F) | 27 years | 19 of 100 (Routine) |
| 27 July 1972 | St Louis St Louis UNIV, US | daily rain | 24.6 mm (1.0 in) | 0.2 mm (0.01 in) | 55 years | 20 of 100 (Routine) |
| 7 July 1972 | St Louis St Louis UNIV, US | daily low min (Tie) | 16.1 C (61.0 F) | tie | 5 years | 1 of 100 (Routine) |
| 6 July 1972 | St Louis St Louis UNIV, US | daily low min (Tie) | 13.9 C (57.0 F) | tie | 5 years | 1 of 100 (Routine) |
| 24 June 1972 | St Louis St Louis UNIV, US | daily low min (Tie) | 15.0 C (59.0 F) | tie | 46 years | 4 of 100 (Routine) |
| 17 June 1972 | St Louis St Louis UNIV, US | daily low min (Tie) | 13.3 C (55.9 F) | tie | 55 years | 5 of 100 (Routine) |
| 14 June 1972 | St Louis St Louis UNIV, US | daily high max (Tie) | 35.6 C (96.1 F) | tie | 50 years | 5 of 100 (Routine) |
| 11 June 1972 | St Louis St Louis UNIV, US | daily low min | 10.6 C (51.1 F) | 1.6 C (2.9 F) | 17 years | 15 of 100 (Routine) |
| 10 June 1972 | St Louis St Louis UNIV, US | daily low min | 9.4 C (48.9 F) | 2.8 C (5.0 F) | 6 years | 14 of 100 (Routine) |
Climate Trend
47 complete years, 1915 to 1965| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1915 | 13.1 C | -0.76 C |
| 1917 | 11.8 C | -1.98 C |
| 1918 | 13.4 C | -0.39 C |
| 1919 | 13.7 C | -0.08 C |
| 1920 | 13.0 C | -0.81 C |
| 1921 | 15.2 C | +1.36 C |
| 1922 | 14.1 C | +0.29 C |
| 1923 | 13.4 C | -0.44 C |
| 1924 | 12.3 C | -1.56 C |
| 1925 | 13.8 C | +0.01 C |
| 1926 | 13.0 C | -0.86 C |
| 1927 | 13.6 C | -0.27 C |
| 1928 | 13.2 C | -0.60 C |
| 1929 | 12.6 C | -1.24 C |
| 1930 | 14.0 C | +0.20 C |
| 1931 | 15.1 C | +1.23 C |
| 1932 | 14.0 C | +0.14 C |
| 1933 | 14.7 C | +0.92 C |
| 1934 | 14.4 C | +0.57 C |
| 1935 | 13.4 C | -0.44 C |
| 1936 | 13.9 C | +0.08 C |
| 1937 | 13.0 C | -0.78 C |
| 1938 | 15.2 C | +1.37 C |
| 1939 | 14.7 C | +0.87 C |
| 1940 | 13.1 C | -0.75 C |
| 1941 | 14.8 C | +0.93 C |
| 1942 | 13.8 C | -0.07 C |
| 1943 | 13.5 C | -0.35 C |
| 1944 | 13.9 C | +0.07 C |
| 1945 | 13.0 C | -0.78 C |
| 1946 | 15.0 C | +1.22 C |
| 1947 | 13.5 C | -0.28 C |
| 1948 | 13.7 C | -0.13 C |
| 1949 | 14.4 C | +0.60 C |
| 1950 | 13.3 C | -0.49 C |
| 1951 | 13.2 C | -0.63 C |
| 1952 | 15.0 C | +1.16 C |
| 1953 | 15.7 C | +1.83 C |
| 1954 | 15.5 C | +1.71 C |
| 1955 | 14.7 C | +0.89 C |
| 1957 | 14.3 C | +0.47 C |
| 1959 | 14.2 C | +0.36 C |
| 1960 | 13.0 C | -0.85 C |
| 1961 | 13.3 C | -0.53 C |
| 1962 | 13.3 C | -0.51 C |
| 1963 | 13.4 C | -0.42 C |
| 1965 | 13.8 C | -0.05 C |
The fitted trend in annual mean temperature here over 1915 to 1965 is 0.15 C (-0.03 to 0.33) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.27 F (-0.05 to 0.59) per decade. The slope is a straight line fitted to 47 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.15 C (-0.03 to 0.33) per decade | 0.27 F (-0.05 to 0.59) per decade | 1915 to 1965 | 47 | Not clearly different from zero |
| Mean daily maximum | 0.18 C (-0.02 to 0.38) per decade | 0.32 F (-0.04 to 0.69) per decade | 1915 to 1965 | 47 | Not clearly different from zero |
| Mean daily minimum | 0.12 C (-0.04 to 0.28) per decade | 0.2 F (-0.1 to 0.5) per decade | 1915 to 1965 | 47 | 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
1911 to 1973| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 45.0 C (113.0 F) | 1954 | 37.5 C (99.5 F) | 62 |
| Coldest night (TNn) | -27.8 C (-18.0 F) | 1918 | -17.8 C (0.0 F) | 62 |
| Wettest day (Rx1day) | 208.3 mm (8.2 in) | 1915 | 66.4 mm (2.6 in) | 62 |
| Wettest five days (Rx5day) | 350.5 mm (13.8 in) | 1946 | 89.6 mm (3.5 in) | 62 |
| Longest dry spell (CDD) | 38 days | 1955 | 22 days | 62 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1911 | 35.6 C (96.1 F) |
| 1912 | 36.1 C (97.0 F) |
| 1913 | 27.8 C (82.0 F) |
| 1914 | 40.0 C (104.0 F) |
| 1915 | 34.4 C (93.9 F) |
| 1916 | 37.8 C (100.0 F) |
| 1917 | 35.6 C (96.1 F) |
| 1918 | 41.1 C (106.0 F) |
| 1919 | 38.3 C (100.9 F) |
| 1920 | 37.8 C (100.0 F) |
| 1921 | 36.7 C (98.1 F) |
| 1922 | 38.3 C (100.9 F) |
| 1923 | 35.6 C (96.1 F) |
| 1924 | 35.0 C (95.0 F) |
| 1925 | 38.9 C (102.0 F) |
| 1926 | 37.8 C (100.0 F) |
| 1927 | 35.6 C (96.1 F) |
| 1928 | 34.4 C (93.9 F) |
| 1929 | 37.2 C (99.0 F) |
| 1930 | 41.7 C (107.1 F) |
| 1931 | 39.4 C (102.9 F) |
| 1932 | 37.8 C (100.0 F) |
| 1933 | 38.9 C (102.0 F) |
| 1934 | 43.3 C (109.9 F) |
| 1935 | 36.7 C (98.1 F) |
| 1936 | 42.2 C (108.0 F) |
| 1937 | 36.7 C (98.1 F) |
| 1938 | 37.8 C (100.0 F) |
| 1939 | 37.8 C (100.0 F) |
| 1940 | 38.3 C (100.9 F) |
| 1941 | 38.3 C (100.9 F) |
| 1942 | 37.8 C (100.0 F) |
| 1943 | 38.9 C (102.0 F) |
| 1944 | 36.7 C (98.1 F) |
| 1945 | 36.7 C (98.1 F) |
| 1946 | 37.2 C (99.0 F) |
| 1947 | 39.4 C (102.9 F) |
| 1948 | 36.1 C (97.0 F) |
| 1949 | 35.6 C (96.1 F) |
| 1950 | 35.0 C (95.0 F) |
| 1951 | 37.2 C (99.0 F) |
| 1952 | 39.4 C (102.9 F) |
| 1953 | 39.4 C (102.9 F) |
| 1954 | 45.0 C (113.0 F) |
| 1955 | 37.2 C (99.0 F) |
| 1956 | 37.8 C (100.0 F) |
| 1957 | 35.6 C (96.1 F) |
| 1958 | 34.4 C (93.9 F) |
| 1959 | 35.0 C (95.0 F) |
| 1960 | 36.7 C (98.1 F) |
| 1961 | 35.6 C (96.1 F) |
| 1962 | 40.0 C (104.0 F) |
| 1963 | 38.3 C (100.9 F) |
| 1964 | 36.1 C (97.0 F) |
| 1965 | 37.8 C (100.0 F) |
| 1966 | 40.0 C (104.0 F) |
| 1967 | 35.0 C (95.0 F) |
| 1968 | 36.1 C (97.0 F) |
| 1969 | 35.6 C (96.1 F) |
| 1970 | 39.4 C (102.9 F) |
| 1972 | 38.3 C (100.9 F) |
| 1973 | 26.7 C (80.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1911 | -11.7 C (10.9 F) |
| 1912 | -26.7 C (-16.1 F) |
| 1913 | -2.8 C (27.0 F) |
| 1914 | -16.7 C (1.9 F) |
| 1915 | -20.6 C (-5.1 F) |
| 1916 | -20.6 C (-5.1 F) |
| 1917 | -23.9 C (-11.0 F) |
| 1918 | -27.8 C (-18.0 F) |
| 1919 | -20.0 C (-4.0 F) |
| 1920 | -15.6 C (3.9 F) |
| 1921 | -11.1 C (12.0 F) |
| 1922 | -16.1 C (3.0 F) |
| 1923 | -17.2 C (1.0 F) |
| 1924 | -25.0 C (-13.0 F) |
| 1925 | -18.3 C (-0.9 F) |
| 1926 | -16.1 C (3.0 F) |
| 1927 | -19.4 C (-2.9 F) |
| 1928 | -21.1 C (-6.0 F) |
| 1929 | -16.7 C (1.9 F) |
| 1930 | -25.0 C (-13.0 F) |
| 1931 | -13.9 C (7.0 F) |
| 1932 | -17.8 C (0.0 F) |
| 1933 | -21.1 C (-6.0 F) |
| 1934 | -17.8 C (0.0 F) |
| 1935 | -16.7 C (1.9 F) |
| 1936 | -23.3 C (-9.9 F) |
| 1937 | -15.0 C (5.0 F) |
| 1938 | -15.0 C (5.0 F) |
| 1939 | -15.6 C (3.9 F) |
| 1940 | -24.4 C (-11.9 F) |
| 1941 | -11.7 C (10.9 F) |
| 1942 | -20.0 C (-4.0 F) |
| 1943 | -20.6 C (-5.1 F) |
| 1944 | -18.3 C (-0.9 F) |
| 1945 | -17.8 C (0.0 F) |
| 1946 | -12.8 C (9.0 F) |
| 1947 | -15.6 C (3.9 F) |
| 1948 | -17.2 C (1.0 F) |
| 1949 | -17.2 C (1.0 F) |
| 1950 | -16.1 C (3.0 F) |
| 1951 | -20.6 C (-5.1 F) |
| 1952 | -14.4 C (6.1 F) |
| 1953 | -14.4 C (6.1 F) |
| 1954 | -15.6 C (3.9 F) |
| 1955 | -19.4 C (-2.9 F) |
| 1956 | -13.3 C (8.1 F) |
| 1957 | -16.7 C (1.9 F) |
| 1958 | -20.0 C (-4.0 F) |
| 1959 | -19.4 C (-2.9 F) |
| 1960 | -17.8 C (0.0 F) |
| 1961 | -18.3 C (-0.9 F) |
| 1962 | -22.2 C (-8.0 F) |
| 1963 | -23.3 C (-9.9 F) |
| 1964 | -16.7 C (1.9 F) |
| 1965 | -20.6 C (-5.1 F) |
| 1966 | -22.8 C (-9.0 F) |
| 1967 | -17.2 C (1.0 F) |
| 1968 | -19.4 C (-2.9 F) |
| 1969 | -22.8 C (-9.0 F) |
| 1970 | -17.2 C (1.0 F) |
| 1972 | -12.8 C (9.0 F) |
| 1973 | -2.2 C (28.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1911 | 67.1 mm (2.6 in) |
| 1912 | 101.1 mm (4.0 in) |
| 1913 | 37.1 mm (1.5 in) |
| 1914 | 87.4 mm (3.4 in) |
| 1915 | 208.3 mm (8.2 in) |
| 1916 | 105.9 mm (4.2 in) |
| 1917 | 32.8 mm (1.3 in) |
| 1918 | 100.6 mm (4.0 in) |
| 1919 | 94.7 mm (3.7 in) |
| 1920 | 51.6 mm (2.0 in) |
| 1921 | 82.3 mm (3.2 in) |
| 1922 | 70.4 mm (2.8 in) |
| 1923 | 80.3 mm (3.2 in) |
| 1924 | 79.2 mm (3.1 in) |
| 1925 | 55.4 mm (2.2 in) |
| 1926 | 42.2 mm (1.7 in) |
| 1927 | 89.2 mm (3.5 in) |
| 1928 | 45.7 mm (1.8 in) |
| 1929 | 68.8 mm (2.7 in) |
| 1930 | 34.5 mm (1.4 in) |
| 1931 | 62.7 mm (2.5 in) |
| 1932 | 68.1 mm (2.7 in) |
| 1933 | 41.9 mm (1.6 in) |
| 1934 | 35.1 mm (1.4 in) |
| 1935 | 52.8 mm (2.1 in) |
| 1936 | 62.2 mm (2.4 in) |
| 1937 | 66.8 mm (2.6 in) |
| 1938 | 68.6 mm (2.7 in) |
| 1939 | 101.3 mm (4.0 in) |
| 1940 | 27.7 mm (1.1 in) |
| 1941 | 34.8 mm (1.4 in) |
| 1942 | 179.3 mm (7.1 in) |
| 1943 | 54.6 mm (2.1 in) |
| 1944 | 187.7 mm (7.4 in) |
| 1945 | 96.0 mm (3.8 in) |
| 1946 | 194.3 mm (7.6 in) |
| 1947 | 83.3 mm (3.3 in) |
| 1948 | 71.4 mm (2.8 in) |
| 1949 | 96.0 mm (3.8 in) |
| 1950 | 74.4 mm (2.9 in) |
| 1951 | 38.1 mm (1.5 in) |
| 1952 | 41.4 mm (1.6 in) |
| 1953 | 39.1 mm (1.5 in) |
| 1954 | 66.0 mm (2.6 in) |
| 1955 | 68.6 mm (2.7 in) |
| 1956 | 60.7 mm (2.4 in) |
| 1957 | 165.1 mm (6.5 in) |
| 1958 | 90.4 mm (3.6 in) |
| 1959 | 53.8 mm (2.1 in) |
| 1960 | 63.5 mm (2.5 in) |
| 1961 | 104.1 mm (4.1 in) |
| 1962 | 82.8 mm (3.3 in) |
| 1963 | 62.2 mm (2.4 in) |
| 1964 | 47.0 mm (1.9 in) |
| 1965 | 81.3 mm (3.2 in) |
| 1966 | 42.2 mm (1.7 in) |
| 1967 | 41.9 mm (1.6 in) |
| 1968 | 35.1 mm (1.4 in) |
| 1969 | 49.3 mm (1.9 in) |
| 1970 | 66.0 mm (2.6 in) |
| 1972 | 42.2 mm (1.7 in) |
| 1973 | 30.5 mm (1.2 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1911 | 82.1 mm (3.2 in) |
| 1912 | 189.2 mm (7.4 in) |
| 1913 | 49.1 mm (1.9 in) |
| 1914 | 123.5 mm (4.9 in) |
| 1915 | 255.5 mm (10.1 in) |
| 1916 | 300.0 mm (11.8 in) |
| 1917 | 78.7 mm (3.1 in) |
| 1918 | 123.0 mm (4.8 in) |
| 1919 | 155.9 mm (6.1 in) |
| 1920 | 83.1 mm (3.3 in) |
| 1921 | 89.7 mm (3.5 in) |
| 1922 | 89.4 mm (3.5 in) |
| 1923 | 100.1 mm (3.9 in) |
| 1924 | 88.9 mm (3.5 in) |
| 1925 | 66.6 mm (2.6 in) |
| 1926 | 97.6 mm (3.8 in) |
| 1927 | 108.5 mm (4.3 in) |
| 1928 | 82.1 mm (3.2 in) |
| 1929 | 95.7 mm (3.8 in) |
| 1930 | 68.2 mm (2.7 in) |
| 1931 | 81.1 mm (3.2 in) |
| 1932 | 116.9 mm (4.6 in) |
| 1933 | 95.3 mm (3.8 in) |
| 1934 | 54.1 mm (2.1 in) |
| 1935 | 81.5 mm (3.2 in) |
| 1936 | 64.7 mm (2.5 in) |
| 1937 | 85.6 mm (3.4 in) |
| 1938 | 97.8 mm (3.9 in) |
| 1939 | 115.3 mm (4.5 in) |
| 1940 | 42.8 mm (1.7 in) |
| 1941 | 51.1 mm (2.0 in) |
| 1942 | 190.0 mm (7.5 in) |
| 1943 | 128.0 mm (5.0 in) |
| 1944 | 202.4 mm (8.0 in) |
| 1945 | 120.1 mm (4.7 in) |
| 1946 | 350.5 mm (13.8 in) |
| 1947 | 133.4 mm (5.3 in) |
| 1948 | 87.4 mm (3.4 in) |
| 1949 | 139.2 mm (5.5 in) |
| 1950 | 106.2 mm (4.2 in) |
| 1951 | 87.1 mm (3.4 in) |
| 1952 | 50.5 mm (2.0 in) |
| 1953 | 57.9 mm (2.3 in) |
| 1954 | 79.0 mm (3.1 in) |
| 1955 | 78.1 mm (3.1 in) |
| 1956 | 121.1 mm (4.8 in) |
| 1957 | 238.8 mm (9.4 in) |
| 1958 | 120.2 mm (4.7 in) |
| 1959 | 79.0 mm (3.1 in) |
| 1960 | 116.1 mm (4.6 in) |
| 1961 | 247.2 mm (9.7 in) |
| 1962 | 122.9 mm (4.8 in) |
| 1963 | 65.8 mm (2.6 in) |
| 1964 | 55.4 mm (2.2 in) |
| 1965 | 83.8 mm (3.3 in) |
| 1966 | 86.8 mm (3.4 in) |
| 1967 | 45.7 mm (1.8 in) |
| 1968 | 94.8 mm (3.7 in) |
| 1969 | 72.4 mm (2.9 in) |
| 1970 | 122.2 mm (4.8 in) |
| 1972 | 63.5 mm (2.5 in) |
| 1973 | 42.0 mm (1.7 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1911 | 11 days |
| 1912 | 18 days |
| 1913 | 5 days |
| 1914 | 23 days |
| 1915 | 24 days |
| 1916 | 16 days |
| 1917 | 27 days |
| 1918 | 18 days |
| 1919 | 25 days |
| 1920 | 20 days |
| 1921 | 21 days |
| 1922 | 20 days |
| 1923 | 13 days |
| 1924 | 23 days |
| 1925 | 20 days |
| 1926 | 33 days |
| 1927 | 22 days |
| 1928 | 18 days |
| 1929 | 21 days |
| 1930 | 29 days |
| 1931 | 23 days |
| 1932 | 16 days |
| 1933 | 23 days |
| 1934 | 18 days |
| 1935 | 16 days |
| 1936 | 23 days |
| 1937 | 18 days |
| 1938 | 24 days |
| 1939 | 21 days |
| 1940 | 25 days |
| 1941 | 17 days |
| 1942 | 24 days |
| 1943 | 27 days |
| 1944 | 24 days |
| 1945 | 17 days |
| 1946 | 24 days |
| 1947 | 20 days |
| 1948 | 21 days |
| 1949 | 21 days |
| 1950 | 30 days |
| 1951 | 15 days |
| 1952 | 23 days |
| 1953 | 23 days |
| 1954 | 21 days |
| 1955 | 38 days |
| 1956 | 26 days |
| 1957 | 21 days |
| 1958 | 25 days |
| 1959 | 23 days |
| 1960 | 26 days |
| 1961 | 17 days |
| 1962 | 20 days |
| 1963 | 29 days |
| 1964 | 29 days |
| 1965 | 18 days |
| 1966 | 35 days |
| 1967 | 26 days |
| 1968 | 24 days |
| 1969 | 9 days |
| 1970 | 19 days |
| 1972 | 27 days |
| 1973 | 7 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
47 years with a frostAcross 47 years with a frost, the median last spring frost at St Louis St Louis UNIV falls on 3 April and the median first autumn frost on 4 November, which leaves a median of 213 days between them.
Fitted over all years, the growing season changes by -0.3 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1933 to 1965) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 3 April | n/a | 3 April | n/a | -0.7 days per decade |
| First autumn frost | 4 November | n/a | 3 November | n/a | -1.1 days per decade |
| Growing days | 213 days | n/a | 213 days | n/a | -0.3 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
52 years, 1915 to 1966A day with at least 66.2 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 242.9 mm (9.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 66.2 mm (2.6 in) | |
| 5 years | 99.5 mm (3.9 in) | |
| 10 years | 126.3 mm (5.0 in) | |
| 25 years | 166.7 mm (6.6 in) | |
| 50 years | 202.2 mm (8.0 in) | |
| 100 years | 242.9 mm (9.6 in) | Longer than the 52 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, 52 years of values from 1915 to 1966.
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: 208.3 mm (8.2 in) in 1915; 194.3 mm (7.6 in) in 1946; 187.7 mm (7.4 in) in 1944.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of St Louis St Louis UNIV, at 1950. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1950 ran 0.3 C (0.5 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1950 | +0.3 | +0.5 | likely | 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).