St. Louis Average Weather by Day

Data and chart of the the average high and low temperature for every day of the year in St. Louis, Missouri, based on NOAA data.
Also see:
What's the hottest day of the year in St. Louis?
On average, July 20 is the hottest day of the year St. Louis, Missouri. From 1991–2020, the average high temperature on July 20 was 89.8 °F and the average low was 71.7 °F.
What's the coldest day of the year in St. Louis?
On average, January 16 is the coldest day of the year St. Louis, Missouri. From 1991–2020, the average high temperature on January 16 was 40.2 °F, and the average low was 24.2 °F.
Average Temperature by Day
  • Average temperatures from 1991–2020. Daily averages are a mean of the period from 14 days before to 14 days after, inclusive.
Day Average (°F)
High Low
January 1 41.6 25.9
January 2 41.4 25.7
January 3 41.3 25.6
January 4 41.1 25.4
January 5 40.9 25.2
January 6 40.7 25.0
January 7 40.6 24.8
January 8 40.7 24.9
January 9 40.7 24.9
January 10 40.6 24.8
January 11 40.5 24.6
January 12 40.4 24.5
January 13 40.4 24.4
January 14 40.4 24.3
January 15 40.3 24.2
January 16 40.2 24.2
January 17 40.3 24.2
January 18 40.4 24.3
January 19 40.5 24.3
January 20 40.7 24.3
January 21 40.8 24.3
January 22 40.9 24.4
January 23 41.1 24.4
January 24 41.2 24.5
January 25 41.2 24.5
January 26 41.2 24.4
January 27 41.2 24.4
January 28 41.3 24.5
January 29 41.4 24.6
January 30 41.6 24.7
January 31 41.9 24.9
February 1 42.1 25.0
February 2 42.2 25.1
February 3 42.5 25.4
February 4 42.8 25.6
February 5 43.1 25.9
February 6 43.5 26.1
February 7 43.8 26.4
February 8 44.1 26.6
February 9 44.4 26.9
February 10 44.6 27.1
February 11 44.7 27.3
February 12 44.9 27.4
February 13 45.2 27.6
February 14 45.5 27.8
February 15 45.8 28.1
February 16 46.0 28.2
February 17 46.1 28.2
February 18 46.3 28.4
February 19 46.6 28.7
February 20 47.1 29.0
February 21 47.5 29.3
February 22 47.9 29.6
February 23 48.3 29.8
February 24 48.7 30.1
February 25 49.1 30.3
February 26 49.5 30.7
February 27 50.1 31.1
February 28 50.5 31.5
March 1 51.0 31.8
March 2 51.4 32.1
March 3 51.9 32.6
March 4 52.3 33.0
March 5 52.6 33.4
March 6 52.9 33.7
March 7 53.1 33.9
March 8 53.4 34.2
March 9 53.8 34.5
March 10 54.2 34.8
March 11 54.5 35.1
March 12 54.9 35.5
March 13 55.4 35.9
March 14 55.8 36.3
March 15 56.1 36.7
March 16 56.5 37.1
March 17 57.0 37.5
March 18 57.6 38.0
March 19 58.1 38.5
March 20 58.6 38.9
March 21 58.8 39.2
March 22 59.1 39.4
March 23 59.3 39.7
March 24 59.8 40.2
March 25 60.3 40.6
March 26 60.7 41.0
March 27 61.1 41.4
March 28 61.5 41.7
March 29 61.7 42.1
March 30 62.0 42.3
March 31 62.4 42.7
April 1 62.8 43.0
April 2 63.2 43.3
April 3 63.7 43.6
April 4 64.2 43.9
April 5 64.6 44.4
April 6 65.0 44.7
April 7 65.3 44.9
April 8 65.6 45.2
April 9 66.0 45.5
April 10 66.4 45.8
April 11 66.7 46.2
April 12 67.0 46.5
April 13 67.3 46.7
April 14 67.5 47.0
April 15 67.8 47.3
April 16 68.2 47.7
April 17 68.3 48.0
April 18 68.5 48.3
April 19 68.8 48.7
April 20 69.0 49.1
April 21 69.5 49.4
April 22 69.7 49.8
April 23 70.1 50.1
April 24 70.5 50.6
April 25 70.7 51.0
April 26 71.1 51.4
April 27 71.5 51.8
April 28 71.8 52.1
April 29 72.0 52.4
April 30 72.1 52.6
May 1 72.4 52.9
May 2 72.6 53.3
May 3 72.7 53.6
May 4 72.9 53.8
May 5 73.2 54.1
May 6 73.5 54.4
May 7 73.8 54.7
May 8 74.1 55.1
May 9 74.5 55.5
May 10 74.9 55.9
May 11 75.2 56.3
May 12 75.6 56.7
May 13 76.0 57.1
May 14 76.4 57.5
May 15 76.7 57.9
May 16 77.1 58.3
May 17 77.4 58.6
May 18 77.9 59.0
May 19 78.2 59.4
May 20 78.3 59.7
May 21 78.5 59.9
May 22 78.7 60.1
May 23 78.9 60.3
May 24 79.2 60.6
May 25 79.4 60.9
May 26 79.7 61.2
May 27 80.1 61.5
May 28 80.5 62.0
May 29 80.9 62.4
May 30 81.2 62.8
May 31 81.5 63.1
June 1 81.9 63.4
June 2 82.2 63.8
June 3 82.5 64.1
June 4 82.9 64.5
June 5 83.3 64.9
June 6 83.6 65.3
June 7 83.9 65.6
June 8 84.1 65.8
June 9 84.4 66.1
June 10 84.7 66.4
June 11 85.0 66.6
June 12 85.2 66.9
June 13 85.4 67.0
June 14 85.6 67.2
June 15 85.8 67.4
June 16 86.0 67.7
June 17 86.2 67.9
June 18 86.5 68.1
June 19 86.7 68.3
June 20 86.9 68.6
June 21 87.2 68.8
June 22 87.4 69.0
June 23 87.6 69.2
June 24 87.8 69.4
June 25 88.0 69.6
June 26 88.2 69.7
June 27 88.3 69.9
June 28 88.4 70.0
June 29 88.5 70.2
June 30 88.6 70.3
July 1 88.7 70.4
July 2 88.8 70.4
July 3 89.0 70.6
July 4 89.1 70.7
July 5 89.2 70.8
July 6 89.3 71.0
July 7 89.4 71.1
July 8 89.5 71.2
July 9 89.6 71.3
July 10 89.6 71.3
July 11 89.7 71.4
July 12 89.7 71.5
July 13 89.7 71.6
July 14 89.7 71.6
July 15 89.7 71.6
July 16 89.7 71.6
July 17 89.7 71.6
July 18 89.7 71.6
July 19 89.8 71.6
July 20 89.8 71.7
July 21 89.8 71.7
July 22 89.6 71.6
July 23 89.5 71.5
July 24 89.4 71.4
July 25 89.4 71.4
July 26 89.4 71.4
July 27 89.4 71.3
July 28 89.3 71.3
July 29 89.3 71.2
July 30 89.2 71.1
July 31 89.0 71.0
August 1 88.9 70.8
August 2 88.8 70.6
August 3 88.6 70.5
August 4 88.6 70.4
August 5 88.4 70.3
August 6 88.3 70.2
August 7 88.2 70.0
August 8 88.2 70.0
August 9 88.2 69.9
August 10 88.1 69.8
August 11 88.1 69.8
August 12 88.1 69.7
August 13 88.2 69.8
August 14 88.3 69.8
August 15 88.3 69.8
August 16 88.1 69.7
August 17 88.0 69.6
August 18 87.8 69.4
August 19 87.7 69.3
August 20 87.7 69.2
August 21 87.7 69.0
August 22 87.6 68.9
August 23 87.4 68.7
August 24 87.3 68.5
August 25 87.0 68.3
August 26 86.9 68.1
August 27 86.7 67.9
August 28 86.6 67.7
August 29 86.5 67.5
August 30 86.3 67.4
August 31 86.1 67.1
September 1 85.8 66.8
September 2 85.4 66.5
September 3 85.2 66.2
September 4 85.0 65.9
September 5 84.8 65.7
September 6 84.5 65.4
September 7 84.1 65.0
September 8 83.8 64.7
September 9 83.4 64.2
September 10 83.0 63.8
September 11 82.6 63.3
September 12 82.1 62.9
September 13 81.8 62.4
September 14 81.4 62.0
September 15 81.1 61.5
September 16 80.8 61.1
September 17 80.5 60.7
September 18 80.2 60.3
September 19 79.8 60.0
September 20 79.5 59.6
September 21 79.1 59.2
September 22 78.7 58.8
September 23 78.4 58.4
September 24 78.0 58.0
September 25 77.7 57.5
September 26 77.2 57.2
September 27 76.8 56.7
September 28 76.4 56.3
September 29 76.0 56.0
September 30 75.7 55.6
October 1 75.4 55.1
October 2 75.0 54.7
October 3 74.5 54.2
October 4 74.0 53.7
October 5 73.5 53.2
October 6 73.2 52.8
October 7 72.8 52.5
October 8 72.5 52.2
October 9 72.2 51.9
October 10 71.8 51.5
October 11 71.4 51.1
October 12 70.9 50.8
October 13 70.4 50.5
October 14 69.9 50.1
October 15 69.5 49.7
October 16 69.0 49.4
October 17 68.5 48.9
October 18 68.0 48.5
October 19 67.5 48.0
October 20 67.0 47.6
October 21 66.6 47.3
October 22 66.1 47.0
October 23 65.5 46.6
October 24 65.0 46.1
October 25 64.6 45.7
October 26 64.2 45.4
October 27 63.8 44.9
October 28 63.3 44.5
October 29 62.7 44.0
October 30 62.3 43.6
October 31 61.8 43.3
November 1 61.3 42.9
November 2 60.9 42.6
November 3 60.5 42.3
November 4 60.1 42.0
November 5 59.7 41.6
November 6 59.3 41.2
November 7 58.8 40.8
November 8 58.4 40.5
November 9 58.0 40.1
November 10 57.6 39.6
November 11 57.3 39.2
November 12 56.9 38.9
November 13 56.4 38.5
November 14 56.0 38.2
November 15 55.6 37.9
November 16 55.2 37.5
November 17 54.8 37.2
November 18 54.6 37.0
November 19 54.2 36.7
November 20 53.8 36.3
November 21 53.4 36.0
November 22 52.9 35.6
November 23 52.4 35.2
November 24 51.9 34.8
November 25 51.3 34.5
November 26 51.0 34.1
November 27 50.7 33.8
November 28 50.3 33.6
November 29 50.0 33.3
November 30 49.7 33.1
December 1 49.4 32.8
December 2 49.0 32.6
December 3 48.6 32.2
December 4 48.2 31.9
December 5 47.7 31.5
December 6 47.4 31.2
December 7 47.1 30.9
December 8 46.8 30.7
December 9 46.5 30.4
December 10 46.0 30.1
December 11 45.6 29.8
December 12 45.3 29.6
December 13 45.1 29.3
December 14 44.8 29.0
December 15 44.6 28.8
December 16 44.4 28.7
December 17 44.1 28.5
December 18 43.8 28.1
December 19 43.6 27.9
December 20 43.4 27.7
December 21 43.3 27.6
December 22 43.1 27.4
December 23 43.0 27.3
December 24 42.8 27.1
December 25 42.6 27.1
December 26 42.5 27.0
December 27 42.3 26.8
December 28 42.3 26.7
December 29 42.2 26.6
December 30 42.0 26.3
December 31 41.8 26.1
Weather Station Details
Years Station Coordinates
1939–2024 St. Louis International Airport location
1893–1938 St. Louis location
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