St. Charles Average Weather by Day

Data and chart of the the average high and low temperature for every day of the year in St. Charles, Missouri, based on NOAA data.
Also see:
What's the hottest day of the year in St. Charles?
On average, July 21 is the hottest day of the year St. Charles, Missouri. From 1991–2020, the average high temperature on July 21 was 87.9 °F and the average low was 67.9 °F.
What's the coldest day of the year in St. Charles?
On average, January 17 is the coldest day of the year St. Charles, Missouri. From 1991–2020, the average high temperature on January 17 was 39.0 °F, and the average low was 21.7 °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 40.7 23.4
January 2 40.5 23.2
January 3 40.4 23.1
January 4 40.2 23.0
January 5 40.0 22.8
January 6 39.8 22.5
January 7 39.5 22.3
January 8 39.5 22.2
January 9 39.5 22.3
January 10 39.5 22.3
January 11 39.4 22.2
January 12 39.3 22.1
January 13 39.2 21.9
January 14 39.2 21.8
January 15 39.1 21.7
January 16 39.1 21.7
January 17 39.0 21.7
January 18 39.1 21.7
January 19 39.2 21.7
January 20 39.4 21.7
January 21 39.6 21.8
January 22 39.7 21.9
January 23 39.8 22.0
January 24 40.0 22.0
January 25 40.1 22.0
January 26 40.1 22.1
January 27 40.1 22.0
January 28 40.1 22.0
January 29 40.3 22.0
January 30 40.4 22.1
January 31 40.6 22.2
February 1 40.8 22.3
February 2 41.1 22.4
February 3 41.3 22.6
February 4 41.6 22.8
February 5 41.9 23.1
February 6 42.2 23.3
February 7 42.7 23.6
February 8 42.9 23.8
February 9 43.2 24.0
February 10 43.5 24.3
February 11 43.8 24.5
February 12 43.9 24.7
February 13 44.0 24.9
February 14 44.3 25.0
February 15 44.7 25.3
February 16 45.0 25.4
February 17 45.1 25.5
February 18 45.2 25.7
February 19 45.4 25.9
February 20 45.8 26.1
February 21 46.2 26.4
February 22 46.6 26.6
February 23 46.9 26.9
February 24 47.4 27.1
February 25 47.7 27.3
February 26 48.1 27.6
February 27 48.6 27.9
February 28 49.2 28.3
March 1 49.6 28.6
March 2 49.9 28.9
March 3 50.3 29.2
March 4 50.8 29.6
March 5 51.2 30.0
March 6 51.4 30.4
March 7 51.7 30.6
March 8 51.9 30.8
March 9 52.3 31.1
March 10 52.7 31.4
March 11 53.0 31.7
March 12 53.3 32.0
March 13 53.7 32.4
March 14 54.2 32.8
March 15 54.6 33.2
March 16 54.9 33.6
March 17 55.3 34.0
March 18 55.9 34.4
March 19 56.4 34.8
March 20 57.0 35.3
March 21 57.5 35.7
March 22 57.6 35.9
March 23 57.9 36.1
March 24 58.3 36.5
March 25 58.7 36.9
March 26 59.2 37.4
March 27 59.5 37.8
March 28 60.0 38.2
March 29 60.4 38.5
March 30 60.6 38.8
March 31 60.9 39.1
April 1 61.3 39.5
April 2 61.7 39.8
April 3 62.1 40.0
April 4 62.6 40.4
April 5 63.1 40.7
April 6 63.5 41.1
April 7 63.9 41.4
April 8 64.2 41.6
April 9 64.5 41.9
April 10 64.9 42.2
April 11 65.3 42.5
April 12 65.5 42.8
April 13 65.9 43.1
April 14 66.2 43.3
April 15 66.3 43.6
April 16 66.6 43.9
April 17 67.0 44.2
April 18 67.1 44.6
April 19 67.3 44.9
April 20 67.6 45.3
April 21 67.8 45.7
April 22 68.3 46.0
April 23 68.5 46.3
April 24 68.9 46.7
April 25 69.3 47.1
April 26 69.6 47.4
April 27 69.9 47.8
April 28 70.3 48.2
April 29 70.5 48.5
April 30 70.7 48.8
May 1 70.8 49.0
May 2 71.0 49.4
May 3 71.3 49.6
May 4 71.5 50.0
May 5 71.7 50.2
May 6 72.1 50.6
May 7 72.3 50.9
May 8 72.6 51.2
May 9 73.0 51.7
May 10 73.3 52.1
May 11 73.7 52.4
May 12 74.0 52.9
May 13 74.3 53.3
May 14 74.7 53.7
May 15 75.1 54.1
May 16 75.4 54.5
May 17 75.8 54.9
May 18 76.1 55.3
May 19 76.5 55.6
May 20 76.8 55.9
May 21 76.9 56.3
May 22 77.1 56.5
May 23 77.2 56.8
May 24 77.4 57.0
May 25 77.6 57.3
May 26 77.8 57.6
May 27 78.1 58.0
May 28 78.5 58.4
May 29 78.9 58.8
May 30 79.3 59.3
May 31 79.6 59.7
June 1 79.9 60.0
June 2 80.2 60.3
June 3 80.5 60.7
June 4 80.8 61.1
June 5 81.2 61.4
June 6 81.6 61.8
June 7 81.9 62.1
June 8 82.1 62.4
June 9 82.3 62.6
June 10 82.6 62.9
June 11 82.9 63.1
June 12 83.1 63.3
June 13 83.3 63.5
June 14 83.5 63.6
June 15 83.7 63.7
June 16 83.9 64.0
June 17 84.0 64.2
June 18 84.2 64.4
June 19 84.4 64.6
June 20 84.7 64.8
June 21 84.9 65.1
June 22 85.1 65.3
June 23 85.2 65.4
June 24 85.5 65.6
June 25 85.6 65.8
June 26 85.9 65.9
June 27 86.0 66.0
June 28 86.1 66.1
June 29 86.2 66.2
June 30 86.3 66.4
July 1 86.4 66.4
July 2 86.5 66.5
July 3 86.6 66.6
July 4 86.7 66.8
July 5 86.9 67.0
July 6 87.0 67.1
July 7 87.1 67.2
July 8 87.2 67.3
July 9 87.3 67.4
July 10 87.4 67.5
July 11 87.4 67.6
July 12 87.5 67.7
July 13 87.5 67.9
July 14 87.6 67.9
July 15 87.6 68.0
July 16 87.6 67.9
July 17 87.6 67.9
July 18 87.6 67.9
July 19 87.7 67.9
July 20 87.8 67.9
July 21 87.9 67.9
July 22 87.8 67.8
July 23 87.7 67.8
July 24 87.6 67.7
July 25 87.5 67.6
July 26 87.5 67.6
July 27 87.5 67.6
July 28 87.6 67.5
July 29 87.5 67.4
July 30 87.4 67.3
July 31 87.4 67.2
August 1 87.2 67.0
August 2 87.0 66.8
August 3 86.9 66.6
August 4 86.8 66.5
August 5 86.8 66.4
August 6 86.6 66.2
August 7 86.5 66.1
August 8 86.5 65.9
August 9 86.5 65.8
August 10 86.4 65.7
August 11 86.4 65.5
August 12 86.4 65.5
August 13 86.4 65.5
August 14 86.4 65.5
August 15 86.6 65.5
August 16 86.5 65.4
August 17 86.4 65.3
August 18 86.2 65.2
August 19 86.0 65.0
August 20 85.9 64.8
August 21 85.9 64.7
August 22 85.9 64.5
August 23 85.8 64.3
August 24 85.7 64.2
August 25 85.6 64.0
August 26 85.3 63.8
August 27 85.2 63.6
August 28 85.1 63.4
August 29 85.0 63.1
August 30 84.9 63.0
August 31 84.8 62.8
September 1 84.5 62.4
September 2 84.2 62.2
September 3 83.9 61.9
September 4 83.6 61.6
September 5 83.5 61.3
September 6 83.2 61.1
September 7 82.9 60.7
September 8 82.6 60.4
September 9 82.3 59.9
September 10 81.9 59.5
September 11 81.5 59.1
September 12 81.1 58.6
September 13 80.7 58.2
September 14 80.4 57.7
September 15 80.1 57.2
September 16 79.8 56.8
September 17 79.6 56.4
September 18 79.4 56.0
September 19 79.1 55.8
September 20 78.8 55.5
September 21 78.5 55.2
September 22 78.1 54.7
September 23 77.7 54.3
September 24 77.4 53.9
September 25 77.0 53.4
September 26 76.6 53.0
September 27 76.2 52.6
September 28 75.7 52.2
September 29 75.3 51.8
September 30 74.9 51.4
October 1 74.6 51.0
October 2 74.3 50.6
October 3 73.9 50.1
October 4 73.5 49.7
October 5 73.0 49.3
October 6 72.6 48.8
October 7 72.2 48.4
October 8 71.8 48.0
October 9 71.5 47.7
October 10 71.1 47.4
October 11 70.7 47.0
October 12 70.3 46.7
October 13 69.8 46.4
October 14 69.3 46.0
October 15 68.8 45.7
October 16 68.3 45.4
October 17 67.8 45.0
October 18 67.2 44.5
October 19 66.7 44.0
October 20 66.1 43.5
October 21 65.6 43.1
October 22 65.1 42.8
October 23 64.7 42.5
October 24 64.2 42.1
October 25 63.7 41.7
October 26 63.3 41.3
October 27 63.0 41.1
October 28 62.6 40.7
October 29 62.1 40.3
October 30 61.5 39.9
October 31 61.0 39.5
November 1 60.6 39.2
November 2 60.1 38.8
November 3 59.6 38.5
November 4 59.3 38.2
November 5 58.9 38.0
November 6 58.5 37.7
November 7 58.0 37.4
November 8 57.6 37.1
November 9 57.2 36.7
November 10 56.7 36.4
November 11 56.3 36.0
November 12 56.0 35.7
November 13 55.6 35.3
November 14 55.2 35.0
November 15 54.8 34.8
November 16 54.5 34.5
November 17 54.1 34.2
November 18 53.7 34.0
November 19 53.5 33.8
November 20 53.1 33.5
November 21 52.7 33.1
November 22 52.3 32.8
November 23 51.8 32.5
November 24 51.2 32.2
November 25 50.7 31.7
November 26 50.1 31.3
November 27 49.8 31.0
November 28 49.5 30.8
November 29 49.1 30.5
November 30 48.8 30.3
December 1 48.5 30.1
December 2 48.2 29.9
December 3 47.8 29.6
December 4 47.4 29.2
December 5 47.0 28.9
December 6 46.6 28.6
December 7 46.3 28.3
December 8 46.0 28.1
December 9 45.7 27.8
December 10 45.4 27.6
December 11 45.0 27.3
December 12 44.6 27.0
December 13 44.3 26.8
December 14 44.0 26.5
December 15 43.8 26.2
December 16 43.5 26.0
December 17 43.4 25.8
December 18 43.0 25.5
December 19 42.8 25.2
December 20 42.5 25.0
December 21 42.3 24.9
December 22 42.2 24.8
December 23 42.1 24.6
December 24 41.9 24.4
December 25 41.7 24.3
December 26 41.6 24.3
December 27 41.4 24.2
December 28 41.3 24.0
December 29 41.3 24.0
December 30 41.2 23.8
December 31 40.9 23.5
Weather Station Details
Years Station Coordinates
1893–2024 St. Charles Elm Point location
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