Waterloo Average Weather by Day

Data and chart of the the average high and low temperature for every day of the year in Waterloo, Iowa, based on NOAA data.
What's the hottest day of the year in Waterloo?
On average, July 13 is the hottest day of the year Waterloo, Iowa. From 1991–2020, the average high temperature on July 13 was 84.0 °F and the average low was 62.8 °F.
What's the coldest day of the year in Waterloo?
On average, January 16 is the coldest day of the year Waterloo, Iowa. From 1991–2020, the average high temperature on January 16 was 27.0 °F, and the average low was 9.2 °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 28.9 11.9
January 2 28.7 11.7
January 3 28.5 11.5
January 4 28.3 11.1
January 5 28.1 10.7
January 6 27.9 10.4
January 7 27.8 10.2
January 8 27.8 10.3
January 9 27.7 10.2
January 10 27.6 10.0
January 11 27.4 9.7
January 12 27.3 9.6
January 13 27.2 9.4
January 14 27.1 9.3
January 15 27.0 9.3
January 16 27.0 9.2
January 17 27.0 9.2
January 18 27.0 9.3
January 19 27.0 9.2
January 20 27.1 9.3
January 21 27.1 9.3
January 22 27.2 9.4
January 23 27.3 9.5
January 24 27.3 9.6
January 25 27.2 9.6
January 26 27.1 9.5
January 27 27.1 9.4
January 28 27.3 9.4
January 29 27.3 9.6
January 30 27.5 9.7
January 31 27.7 9.9
February 1 27.9 10.1
February 2 28.0 10.4
February 3 28.3 10.7
February 4 28.7 11.1
February 5 28.9 11.4
February 6 29.2 11.6
February 7 29.5 11.9
February 8 29.8 12.3
February 9 30.0 12.6
February 10 30.2 12.9
February 11 30.4 13.1
February 12 30.6 13.3
February 13 30.9 13.5
February 14 31.2 13.8
February 15 31.5 14.0
February 16 31.7 14.0
February 17 31.8 14.2
February 18 32.1 14.4
February 19 32.5 14.9
February 20 33.0 15.2
February 21 33.3 15.5
February 22 33.7 15.9
February 23 34.1 16.3
February 24 34.5 16.6
February 25 35.0 17.0
February 26 35.5 17.5
February 27 36.1 18.0
February 28 36.7 18.5
March 1 37.2 18.9
March 2 37.8 19.4
March 3 38.4 20.0
March 4 38.8 20.4
March 5 39.3 20.8
March 6 39.8 21.3
March 7 40.2 21.6
March 8 40.7 21.9
March 9 41.2 22.3
March 10 41.7 22.7
March 11 42.2 23.2
March 12 42.8 23.6
March 13 43.5 24.1
March 14 44.0 24.7
March 15 44.7 25.2
March 16 45.3 25.7
March 17 46.0 26.3
March 18 46.7 26.8
March 19 47.4 27.4
March 20 48.0 27.7
March 21 48.4 28.1
March 22 49.0 28.4
March 23 49.6 28.8
March 24 50.2 29.3
March 25 50.7 29.6
March 26 51.1 29.9
March 27 51.6 30.3
March 28 52.1 30.7
March 29 52.4 31.0
March 30 52.8 31.4
March 31 53.2 31.7
April 1 53.7 32.0
April 2 54.2 32.3
April 3 54.7 32.6
April 4 55.3 33.0
April 5 55.7 33.4
April 6 56.1 33.8
April 7 56.4 34.1
April 8 57.0 34.3
April 9 57.5 34.6
April 10 57.9 35.0
April 11 58.3 35.3
April 12 58.7 35.6
April 13 59.0 35.8
April 14 59.2 36.0
April 15 59.6 36.4
April 16 59.9 36.8
April 17 60.2 37.2
April 18 60.5 37.5
April 19 60.9 37.9
April 20 61.3 38.3
April 21 61.7 38.6
April 22 62.2 39.1
April 23 62.7 39.6
April 24 63.2 40.2
April 25 63.7 40.7
April 26 64.1 41.1
April 27 64.5 41.6
April 28 64.8 41.9
April 29 65.0 42.1
April 30 65.3 42.5
May 1 65.7 42.8
May 2 66.1 43.2
May 3 66.4 43.5
May 4 66.8 43.8
May 5 67.4 44.1
May 6 67.7 44.6
May 7 68.0 45.0
May 8 68.4 45.4
May 9 68.8 45.8
May 10 69.1 46.2
May 11 69.4 46.7
May 12 69.8 47.2
May 13 70.3 47.7
May 14 70.7 48.1
May 15 71.1 48.5
May 16 71.6 48.9
May 17 72.1 49.3
May 18 72.5 49.7
May 19 72.8 50.1
May 20 73.0 50.4
May 21 73.3 50.7
May 22 73.6 51.0
May 23 73.9 51.3
May 24 74.3 51.6
May 25 74.6 52.0
May 26 75.0 52.3
May 27 75.5 52.8
May 28 75.9 53.4
May 29 76.3 53.8
May 30 76.7 54.2
May 31 76.9 54.6
June 1 77.2 55.0
June 2 77.5 55.4
June 3 77.8 55.8
June 4 78.1 56.2
June 5 78.5 56.6
June 6 78.7 56.9
June 7 79.0 57.2
June 8 79.3 57.5
June 9 79.6 57.9
June 10 79.9 58.2
June 11 80.2 58.4
June 12 80.4 58.7
June 13 80.7 58.9
June 14 80.7 59.1
June 15 81.0 59.4
June 16 81.2 59.7
June 17 81.4 59.9
June 18 81.6 60.1
June 19 81.9 60.4
June 20 82.0 60.6
June 21 82.2 60.8
June 22 82.3 61.0
June 23 82.4 61.2
June 24 82.6 61.3
June 25 82.7 61.4
June 26 82.8 61.5
June 27 82.9 61.6
June 28 82.9 61.7
June 29 83.0 61.8
June 30 83.1 61.8
July 1 83.2 61.9
July 2 83.3 62.0
July 3 83.4 62.1
July 4 83.6 62.3
July 5 83.7 62.5
July 6 83.8 62.6
July 7 83.8 62.6
July 8 83.9 62.7
July 9 83.9 62.7
July 10 83.9 62.7
July 11 84.0 62.8
July 12 83.9 62.8
July 13 84.0 62.8
July 14 83.9 62.8
July 15 83.9 62.8
July 16 83.9 62.8
July 17 84.0 62.8
July 18 84.0 62.7
July 19 84.0 62.7
July 20 84.0 62.7
July 21 83.9 62.6
July 22 83.8 62.4
July 23 83.7 62.3
July 24 83.7 62.3
July 25 83.7 62.2
July 26 83.7 62.2
July 27 83.6 62.1
July 28 83.5 62.0
July 29 83.4 61.9
July 30 83.3 61.9
July 31 83.1 61.7
August 1 82.9 61.4
August 2 82.8 61.2
August 3 82.6 61.0
August 4 82.5 60.8
August 5 82.4 60.6
August 6 82.3 60.4
August 7 82.2 60.4
August 8 82.2 60.3
August 9 82.1 60.2
August 10 82.0 60.1
August 11 82.0 60.1
August 12 82.0 60.0
August 13 82.0 60.0
August 14 82.0 60.0
August 15 81.8 59.9
August 16 81.7 59.8
August 17 81.6 59.6
August 18 81.4 59.4
August 19 81.5 59.3
August 20 81.5 59.2
August 21 81.4 59.0
August 22 81.3 58.8
August 23 81.3 58.6
August 24 81.1 58.4
August 25 80.9 58.1
August 26 80.7 57.9
August 27 80.6 57.7
August 28 80.5 57.4
August 29 80.4 57.3
August 30 80.3 57.1
August 31 80.0 56.8
September 1 79.9 56.5
September 2 79.8 56.3
September 3 79.6 56.0
September 4 79.4 55.8
September 5 79.2 55.5
September 6 79.0 55.2
September 7 78.6 54.8
September 8 78.2 54.4
September 9 77.8 53.9
September 10 77.5 53.5
September 11 77.1 53.0
September 12 76.8 52.6
September 13 76.5 52.2
September 14 76.1 51.7
September 15 75.8 51.3
September 16 75.5 50.9
September 17 75.1 50.5
September 18 74.7 50.1
September 19 74.3 49.8
September 20 73.8 49.4
September 21 73.4 48.9
September 22 73.0 48.5
September 23 72.7 48.2
September 24 72.5 47.8
September 25 72.1 47.4
September 26 71.6 46.9
September 27 71.2 46.5
September 28 70.8 46.1
September 29 70.3 45.7
September 30 69.8 45.3
October 1 69.3 44.9
October 2 68.7 44.4
October 3 68.3 44.0
October 4 67.8 43.5
October 5 67.3 43.0
October 6 66.9 42.6
October 7 66.6 42.2
October 8 66.1 41.8
October 9 65.7 41.5
October 10 65.1 41.1
October 11 64.7 40.7
October 12 64.1 40.4
October 13 63.5 40.0
October 14 63.0 39.7
October 15 62.4 39.3
October 16 61.9 38.9
October 17 61.3 38.5
October 18 60.8 38.1
October 19 60.3 37.7
October 20 59.8 37.2
October 21 59.3 36.8
October 22 58.7 36.4
October 23 58.0 36.0
October 24 57.5 35.5
October 25 56.9 35.2
October 26 56.4 34.8
October 27 55.9 34.3
October 28 55.4 33.8
October 29 54.8 33.4
October 30 54.3 32.9
October 31 53.8 32.5
November 1 53.3 32.1
November 2 52.8 31.8
November 3 52.3 31.5
November 4 51.8 31.2
November 5 51.2 30.9
November 6 50.7 30.5
November 7 50.2 29.9
November 8 49.7 29.5
November 9 49.1 29.1
November 10 48.7 28.7
November 11 48.3 28.3
November 12 47.7 27.9
November 13 47.1 27.4
November 14 46.6 26.9
November 15 46.2 26.6
November 16 45.7 26.2
November 17 45.3 25.9
November 18 44.8 25.5
November 19 44.3 25.1
November 20 43.8 24.7
November 21 43.3 24.3
November 22 42.6 23.9
November 23 42.0 23.4
November 24 41.4 22.9
November 25 40.8 22.5
November 26 40.4 22.1
November 27 40.0 21.8
November 28 39.5 21.5
November 29 39.1 21.2
November 30 38.8 20.9
December 1 38.3 20.6
December 2 37.9 20.2
December 3 37.3 19.7
December 4 36.9 19.2
December 5 36.4 18.8
December 6 36.0 18.6
December 7 35.5 18.3
December 8 35.1 18.0
December 9 34.7 17.6
December 10 34.2 17.1
December 11 33.9 16.9
December 12 33.6 16.6
December 13 33.3 16.4
December 14 33.1 16.2
December 15 32.8 15.9
December 16 32.5 15.7
December 17 32.1 15.4
December 18 31.7 15.1
December 19 31.4 14.8
December 20 31.3 14.6
December 21 31.0 14.4
December 22 30.9 14.2
December 23 30.6 13.9
December 24 30.3 13.7
December 25 30.2 13.5
December 26 30.1 13.3
December 27 29.9 13.1
December 28 29.8 13.0
December 29 29.5 12.8
December 30 29.3 12.4
December 31 29.0 12.1
Weather Station Details
Years Station Coordinates
1950–2024 Waterloo Municipal Airport location
1895–1950 Waterloo location