Helena Average Weather by Day

Data and chart of the the average high and low temperature for every day of the year in Helena, Montana, based on NOAA data.
Also see:
What's the hottest day of the year in Helena?
On average, July 27 is the hottest day of the year Helena, Montana. From 1991–2020, the average high temperature on July 27 was 87.4 °F and the average low was 55.1 °F.
What's the coldest day of the year in Helena?
On average, January 3 is the coldest day of the year Helena, Montana. From 1991–2020, the average high temperature on January 3 was 30.3 °F, and the average low was 11.5 °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 30.3 11.5
January 2 30.3 11.5
January 3 30.3 11.5
January 4 30.4 11.5
January 5 30.5 11.7
January 6 30.7 11.9
January 7 31.0 12.0
January 8 31.1 12.1
January 9 31.2 12.2
January 10 31.3 12.3
January 11 31.4 12.3
January 12 31.5 12.4
January 13 31.6 12.5
January 14 31.8 12.5
January 15 32.0 12.6
January 16 32.3 12.8
January 17 32.5 13.2
January 18 32.9 13.5
January 19 33.2 13.7
January 20 33.4 13.8
January 21 33.7 14.1
January 22 33.9 14.3
January 23 34.0 14.4
January 24 34.2 14.5
January 25 34.4 14.7
January 26 34.7 14.9
January 27 34.9 15.1
January 28 35.0 15.2
January 29 35.2 15.3
January 30 35.4 15.5
January 31 35.6 15.7
February 1 35.9 15.8
February 2 36.1 16.0
February 3 36.2 16.1
February 4 36.3 16.2
February 5 36.5 16.4
February 6 36.6 16.5
February 7 36.9 16.6
February 8 37.1 16.8
February 9 37.3 16.9
February 10 37.3 16.9
February 11 37.3 16.9
February 12 37.3 16.9
February 13 37.5 16.9
February 14 37.5 17.0
February 15 37.6 17.0
February 16 37.8 17.1
February 17 38.0 17.1
February 18 38.1 17.4
February 19 38.3 17.5
February 20 38.4 17.5
February 21 38.6 17.6
February 22 38.7 17.6
February 23 39.1 17.8
February 24 39.5 18.1
February 25 39.9 18.4
February 26 40.5 18.7
February 27 40.9 19.0
February 28 41.3 19.3
March 1 41.7 19.5
March 2 42.0 19.8
March 3 42.2 20.0
March 4 42.6 20.2
March 5 43.0 20.4
March 6 43.4 20.6
March 7 43.8 20.9
March 8 44.2 21.2
March 9 44.6 21.5
March 10 44.9 21.8
March 11 45.4 22.1
March 12 45.9 22.6
March 13 46.4 23.1
March 14 46.8 23.6
March 15 47.2 24.0
March 16 47.7 24.3
March 17 48.2 24.7
March 18 48.6 25.0
March 19 48.9 25.3
March 20 49.3 25.5
March 21 49.8 25.9
March 22 50.2 26.3
March 23 50.6 26.7
March 24 50.9 27.0
March 25 51.2 27.2
March 26 51.4 27.5
March 27 51.6 27.7
March 28 51.8 27.8
March 29 52.0 28.0
March 30 52.2 28.2
March 31 52.4 28.4
April 1 52.6 28.6
April 2 52.8 28.8
April 3 53.2 29.0
April 4 53.3 29.3
April 5 53.6 29.5
April 6 53.8 29.7
April 7 54.2 29.9
April 8 54.7 30.2
April 9 55.0 30.6
April 10 55.4 30.9
April 11 55.7 31.1
April 12 56.1 31.3
April 13 56.4 31.5
April 14 56.5 31.8
April 15 56.7 32.0
April 16 56.8 32.2
April 17 57.1 32.5
April 18 57.4 32.7
April 19 57.8 32.9
April 20 58.2 33.1
April 21 58.6 33.4
April 22 58.9 33.7
April 23 59.1 34.0
April 24 59.5 34.3
April 25 59.8 34.5
April 26 60.0 34.8
April 27 60.3 35.0
April 28 60.6 35.3
April 29 61.0 35.6
April 30 61.6 36.0
May 1 62.0 36.4
May 2 62.3 36.8
May 3 62.8 37.1
May 4 63.1 37.4
May 5 63.4 37.8
May 6 63.7 38.1
May 7 63.8 38.4
May 8 64.0 38.7
May 9 64.2 38.9
May 10 64.4 39.2
May 11 64.7 39.5
May 12 65.0 39.8
May 13 65.4 40.2
May 14 65.7 40.5
May 15 66.2 40.8
May 16 66.5 41.2
May 17 66.8 41.5
May 18 67.1 41.9
May 19 67.4 42.2
May 20 67.6 42.5
May 21 68.0 42.8
May 22 68.4 43.1
May 23 68.6 43.4
May 24 68.9 43.7
May 25 69.2 44.0
May 26 69.4 44.3
May 27 69.5 44.5
May 28 69.6 44.7
May 29 69.8 44.9
May 30 70.0 45.0
May 31 70.1 45.2
June 1 70.2 45.4
June 2 70.4 45.5
June 3 70.5 45.7
June 4 70.7 46.0
June 5 71.0 46.2
June 6 71.3 46.3
June 7 71.8 46.5
June 8 72.1 46.8
June 9 72.5 47.0
June 10 72.8 47.2
June 11 73.2 47.4
June 12 73.6 47.7
June 13 74.0 47.9
June 14 74.5 48.2
June 15 74.8 48.4
June 16 75.1 48.7
June 17 75.4 48.9
June 18 75.7 49.1
June 19 76.0 49.3
June 20 76.3 49.5
June 21 76.6 49.7
June 22 77.1 49.9
June 23 77.6 50.1
June 24 78.0 50.4
June 25 78.6 50.6
June 26 79.0 50.9
June 27 79.4 51.1
June 28 79.9 51.3
June 29 80.3 51.6
June 30 80.8 51.8
July 1 81.3 52.1
July 2 81.8 52.2
July 3 82.2 52.4
July 4 82.7 52.7
July 5 83.1 53.0
July 6 83.4 53.2
July 7 83.8 53.3
July 8 84.1 53.5
July 9 84.4 53.7
July 10 84.7 53.9
July 11 85.0 54.1
July 12 85.2 54.2
July 13 85.4 54.3
July 14 85.7 54.4
July 15 86.0 54.5
July 16 86.2 54.6
July 17 86.4 54.7
July 18 86.7 54.7
July 19 86.8 54.9
July 20 87.0 54.9
July 21 87.0 55.0
July 22 87.1 55.0
July 23 87.2 55.0
July 24 87.3 55.1
July 25 87.3 55.1
July 26 87.3 55.1
July 27 87.4 55.1
July 28 87.3 55.1
July 29 87.3 55.0
July 30 87.2 54.9
July 31 87.2 54.9
August 1 87.2 54.8
August 2 87.1 54.7
August 3 86.9 54.6
August 4 86.8 54.5
August 5 86.8 54.4
August 6 86.7 54.3
August 7 86.5 54.1
August 8 86.4 53.9
August 9 86.2 53.8
August 10 86.0 53.7
August 11 85.8 53.5
August 12 85.7 53.2
August 13 85.5 53.1
August 14 85.3 52.9
August 15 85.1 52.8
August 16 84.8 52.6
August 17 84.6 52.3
August 18 84.4 52.2
August 19 84.3 51.9
August 20 84.2 51.7
August 21 83.9 51.6
August 22 83.5 51.4
August 23 83.2 51.1
August 24 82.9 50.9
August 25 82.5 50.6
August 26 82.1 50.4
August 27 81.8 50.1
August 28 81.5 49.9
August 29 81.1 49.6
August 30 80.7 49.3
August 31 80.3 49.1
September 1 80.0 48.8
September 2 79.6 48.5
September 3 79.0 48.2
September 4 78.5 47.9
September 5 78.0 47.6
September 6 77.4 47.3
September 7 76.9 46.8
September 8 76.4 46.4
September 9 76.0 46.1
September 10 75.5 45.8
September 11 75.1 45.4
September 12 74.7 45.1
September 13 74.2 44.8
September 14 73.9 44.4
September 15 73.6 44.2
September 16 73.2 43.8
September 17 72.7 43.5
September 18 72.1 43.1
September 19 71.4 42.7
September 20 70.8 42.2
September 21 70.2 41.8
September 22 69.8 41.4
September 23 69.4 41.1
September 24 68.9 40.7
September 25 68.4 40.3
September 26 67.9 39.9
September 27 67.3 39.5
September 28 66.7 39.1
September 29 66.2 38.8
September 30 65.7 38.5
October 1 65.2 38.1
October 2 64.8 37.7
October 3 64.4 37.4
October 4 64.0 37.1
October 5 63.7 36.8
October 6 63.4 36.6
October 7 63.0 36.4
October 8 62.6 36.1
October 9 62.1 35.8
October 10 61.5 35.3
October 11 60.8 34.9
October 12 60.2 34.5
October 13 59.6 34.1
October 14 58.9 33.7
October 15 58.1 33.2
October 16 57.4 32.7
October 17 56.9 32.4
October 18 56.4 32.0
October 19 56.0 31.6
October 20 55.6 31.3
October 21 55.0 30.9
October 22 54.5 30.6
October 23 54.0 30.2
October 24 53.5 29.9
October 25 52.9 29.7
October 26 52.5 29.3
October 27 52.1 28.9
October 28 51.5 28.5
October 29 51.1 28.1
October 30 50.7 27.9
October 31 50.3 27.6
November 1 49.8 27.3
November 2 49.5 27.0
November 3 49.0 26.7
November 4 48.5 26.4
November 5 48.0 26.0
November 6 47.5 25.6
November 7 46.9 25.2
November 8 46.3 24.8
November 9 45.8 24.4
November 10 45.3 24.1
November 11 44.8 23.8
November 12 44.4 23.5
November 13 44.0 23.2
November 14 43.6 22.9
November 15 43.2 22.6
November 16 42.9 22.4
November 17 42.5 22.2
November 18 42.2 22.0
November 19 41.8 21.7
November 20 41.3 21.3
November 21 40.8 20.9
November 22 40.3 20.4
November 23 39.8 20.0
November 24 39.4 19.6
November 25 39.0 19.2
November 26 38.7 19.0
November 27 38.4 18.7
November 28 37.9 18.4
November 29 37.5 18.0
November 30 37.1 17.8
December 1 36.7 17.5
December 2 36.4 17.2
December 3 36.0 16.9
December 4 35.8 16.6
December 5 35.4 16.3
December 6 35.2 16.2
December 7 35.0 16.1
December 8 34.8 15.8
December 9 34.4 15.4
December 10 34.1 15.1
December 11 33.8 14.9
December 12 33.6 14.7
December 13 33.4 14.5
December 14 33.3 14.3
December 15 33.0 14.1
December 16 32.7 13.8
December 17 32.4 13.6
December 18 32.1 13.3
December 19 32.0 13.1
December 20 31.8 12.9
December 21 31.7 12.8
December 22 31.7 12.7
December 23 31.6 12.6
December 24 31.5 12.7
December 25 31.4 12.6
December 26 31.2 12.5
December 27 31.1 12.3
December 28 30.8 12.1
December 29 30.7 11.8
December 30 30.5 11.7
December 31 30.4 11.6
Weather Station Details
Years Station Coordinates
1939–2024 Helena Regional Airport location
1893–1938 Helna location
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