WEATHER IN St. Louis
Monthly temperature
| Month | Record low | Average low | Average | Average high | Record high |
| january | -19 (1930) | 23.8 | 32.1 | 40.4 | 77 (1950) |
| february | -18 (1905) | 27.6 | 36.7 | 45.8 | 84 (1911) |
| march | -5 (1960) | 36.7 | 46.6 | 56.6 | 92 (1929) |
| april | 20 (1936) | 47.0 | 57.5 | 68.0 | 93 (1930) |
| may | 31 (1976) | 57.9 | 67.5 | 77.1 | 98 (1953) |
| june | 43 (1969) | 67.2 | 76.5 | 85.9 | 108 (2012) |
| july | 51 (1972) | 71.1 | 80.4 | 89.6 | 115 (1954) |
| august | 47 (1986) | 69.3 | 78.8 | 88.3 | 110 (1934) |
| september | 32 (1942) | 60.9 | 71.0 | 81.1 | 104 (1984) |
| october | 21 (1925) | 49.1 | 59.1 | 69.2 | 94 (1953) |
| november | 1 (1964) | 37.4 | 46.5 | 55.5 | 86 (1937) |
| december | -16 (1989) | 28.5 | 36.5 | 44.5 | 76 (1970) |
| year | -19 (1930) | 47.8 | 57.0 | 66.1 | 115 (1954) |
Monthly precipitation
| Month | Average | Record low | Record high | Daily high |
| january | 2.59 | 0.10 (1986) | 9.01 (2005) | 4.16 (1950) |
| february | 2.23 | 0.25 (1963) | 8.94 (1882) | 3.96 (1882) |
| march | 3.50 | 0.14 (1910) | 9.52 (1938) | 3.59 (1913) |
| april | 4.73 | 0.46 (1895) | 10.84 (1893) | 4.79 (1979) |
| may | 4.82 | 0.54 (1934) | 12.92 (1995) | 5.59 (1995) |
| june | 4.49 | 0.10 (1914) | 12.35 (2003) | 4.70 (1902) |
| july | 3.93 | 0.25 (1930) | 10.71 (1981) | 4.68 (1948) |
| august | 3.38 | 0.07 (1873) | 20.45 (1946) | 6.85 (1915) |
| september | 2.96 | 0.00 (1979) | 10.53 (1866) | 4.61 (1945) |
| october | 3.15 | 0.21 (1908) | 12.38 (2009) | 2.91 (1946) |
| november | 3.42 | 0.00 (1865) | 9.95 (1985) | 3.56 (1921) |
| december | 2.50 | 0.03 (1955) | 10.90 (1846) | 3.04 (1922) |
| year | 40.96 | 20.59 (1953) | 68.83 (1858) | 6.85 (1915) |
Number of days with solid, liquid, and mixed precipitation
| Type of precipitation | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Wind speed, m/s
| jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
The frequency of different wind directions, %
| direction | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Air humidity, %
| jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
Snow cover
| Month | jul | aug | sep | oct | nov | dec | jan | feb | mar | apr | may | jun | Year |
| number of days | |||||||||||||
| height (sm) | |||||||||||||
| max height (sm) |
Cloudy, score
| month | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
| total | |||||||||||||
| low |
Number of clear, cloudy and cloudy days
| month | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
| Total cloud | |||||||||||||
| Low cloud | |||||||||||||
Number of days with different phenomena
| phenomenon | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |
The frequency of different types of clouds, %
| type of clouds | jan | feb | mar | apr | may | jun | jul | aug | sep | oct | nov | dec | Year |