Boise Average Weather by Day

Data and chart of the the average high and low temperature for every day of the year in Boise, Idaho, based on NOAA data.
Also see:
What's the hottest day of the year in Boise?
On average, July 27 is the hottest day of the year Boise, Idaho. From 1991–2020, the average high temperature on July 27 was 93.7 °F and the average low was 62.6 °F.
What's the coldest day of the year in Boise?
On average, January 2 is the coldest day of the year Boise, Idaho. From 1991–2020, the average high temperature on January 2 was 37.7 °F, and the average low was 24.1 °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 37.7 24.1
January 2 37.7 24.1
January 3 37.7 24.1
January 4 37.8 24.2
January 5 37.7 24.3
January 6 37.7 24.4
January 7 37.8 24.5
January 8 37.8 24.6
January 9 37.9 24.7
January 10 38.1 24.8
January 11 38.2 24.9
January 12 38.3 25.0
January 13 38.3 25.0
January 14 38.5 25.0
January 15 38.7 25.1
January 16 38.8 25.2
January 17 39.0 25.3
January 18 39.2 25.5
January 19 39.4 25.6
January 20 39.6 25.8
January 21 39.9 26.0
January 22 40.1 26.1
January 23 40.3 26.2
January 24 40.5 26.3
January 25 40.7 26.3
January 26 40.8 26.5
January 27 41.1 26.6
January 28 41.3 26.7
January 29 41.5 26.8
January 30 41.7 27.0
January 31 42.0 27.2
February 1 42.3 27.3
February 2 42.6 27.4
February 3 42.9 27.5
February 4 43.2 27.6
February 5 43.5 27.7
February 6 43.8 27.9
February 7 44.1 28.0
February 8 44.4 28.1
February 9 44.6 28.2
February 10 44.8 28.3
February 11 45.1 28.3
February 12 45.3 28.4
February 13 45.5 28.5
February 14 45.8 28.6
February 15 46.1 28.8
February 16 46.3 28.9
February 17 46.6 29.2
February 18 46.9 29.4
February 19 47.2 29.5
February 20 47.5 29.7
February 21 47.7 29.8
February 22 48.0 29.9
February 23 48.3 30.1
February 24 48.6 30.2
February 25 49.0 30.5
February 26 49.4 30.7
February 27 49.8 30.9
February 28 50.2 31.1
March 1 50.5 31.3
March 2 50.9 31.5
March 3 51.1 31.7
March 4 51.5 31.9
March 5 51.9 32.1
March 6 52.3 32.3
March 7 52.7 32.5
March 8 53.1 32.8
March 9 53.4 33.0
March 10 53.7 33.3
March 11 54.0 33.5
March 12 54.3 33.7
March 13 54.6 33.9
March 14 54.9 34.1
March 15 55.1 34.4
March 16 55.5 34.5
March 17 55.9 34.7
March 18 56.1 34.8
March 19 56.3 34.9
March 20 56.6 35.1
March 21 56.8 35.2
March 22 57.1 35.5
March 23 57.3 35.7
March 24 57.5 35.9
March 25 57.7 36.0
March 26 57.8 36.1
March 27 58.0 36.2
March 28 58.1 36.3
March 29 58.3 36.4
March 30 58.4 36.5
March 31 58.5 36.6
April 1 58.6 36.6
April 2 58.9 36.7
April 3 59.0 36.9
April 4 59.1 37.0
April 5 59.3 37.1
April 6 59.6 37.3
April 7 59.9 37.5
April 8 60.2 37.7
April 9 60.5 37.8
April 10 60.8 38.0
April 11 61.2 38.3
April 12 61.5 38.5
April 13 61.9 38.7
April 14 62.0 38.9
April 15 62.2 39.0
April 16 62.4 39.1
April 17 62.7 39.3
April 18 63.0 39.6
April 19 63.4 39.8
April 20 63.7 39.9
April 21 64.1 40.2
April 22 64.4 40.4
April 23 64.6 40.6
April 24 65.0 40.8
April 25 65.2 41.0
April 26 65.5 41.2
April 27 65.9 41.5
April 28 66.3 41.7
April 29 66.8 42.1
April 30 67.3 42.5
May 1 67.7 42.9
May 2 68.0 43.2
May 3 68.3 43.5
May 4 68.6 43.8
May 5 68.9 44.0
May 6 69.1 44.2
May 7 69.2 44.4
May 8 69.5 44.6
May 9 69.9 44.9
May 10 70.3 45.1
May 11 70.6 45.4
May 12 70.9 45.7
May 13 71.2 46.0
May 14 71.5 46.3
May 15 71.9 46.7
May 16 72.3 47.0
May 17 72.7 47.3
May 18 73.0 47.7
May 19 73.4 48.0
May 20 73.7 48.3
May 21 74.1 48.6
May 22 74.4 48.8
May 23 74.6 49.1
May 24 74.9 49.3
May 25 75.2 49.6
May 26 75.4 49.7
May 27 75.5 49.9
May 28 75.7 50.1
May 29 75.9 50.2
May 30 76.1 50.3
May 31 76.3 50.4
June 1 76.6 50.5
June 2 76.8 50.7
June 3 77.0 50.8
June 4 77.4 51.0
June 5 77.7 51.2
June 6 78.1 51.4
June 7 78.4 51.7
June 8 78.7 51.9
June 9 79.0 52.1
June 10 79.4 52.3
June 11 79.8 52.5
June 12 80.1 52.8
June 13 80.5 53.0
June 14 80.9 53.3
June 15 81.2 53.6
June 16 81.5 53.8
June 17 81.9 54.0
June 18 82.2 54.2
June 19 82.5 54.4
June 20 82.9 54.6
June 21 83.4 54.8
June 22 83.8 55.2
June 23 84.3 55.5
June 24 84.7 55.8
June 25 85.3 56.1
June 26 85.7 56.5
June 27 86.1 56.8
June 28 86.6 57.1
June 29 87.1 57.4
June 30 87.5 57.7
July 1 88.0 58.0
July 2 88.5 58.3
July 3 88.9 58.7
July 4 89.3 59.0
July 5 89.6 59.3
July 6 90.0 59.5
July 7 90.3 59.7
July 8 90.7 60.0
July 9 90.9 60.2
July 10 91.2 60.5
July 11 91.5 60.7
July 12 91.7 60.9
July 13 92.0 61.0
July 14 92.3 61.2
July 15 92.6 61.4
July 16 92.7 61.6
July 17 92.9 61.7
July 18 93.2 61.9
July 19 93.3 62.0
July 20 93.4 62.2
July 21 93.5 62.3
July 22 93.7 62.4
July 23 93.7 62.5
July 24 93.7 62.6
July 25 93.7 62.6
July 26 93.7 62.6
July 27 93.7 62.6
July 28 93.6 62.6
July 29 93.6 62.7
July 30 93.5 62.6
July 31 93.5 62.6
August 1 93.4 62.6
August 2 93.4 62.6
August 3 93.3 62.5
August 4 93.2 62.5
August 5 93.1 62.4
August 6 92.9 62.3
August 7 92.8 62.3
August 8 92.6 62.1
August 9 92.4 61.9
August 10 92.1 61.7
August 11 91.9 61.5
August 12 91.7 61.3
August 13 91.4 61.1
August 14 91.3 60.9
August 15 91.0 60.8
August 16 90.7 60.6
August 17 90.4 60.4
August 18 90.2 60.1
August 19 89.9 59.9
August 20 89.7 59.7
August 21 89.4 59.4
August 22 89.1 59.1
August 23 88.9 58.9
August 24 88.5 58.7
August 25 88.2 58.4
August 26 87.8 58.1
August 27 87.5 57.8
August 28 87.1 57.5
August 29 86.8 57.2
August 30 86.4 56.9
August 31 86.1 56.7
September 1 85.8 56.5
September 2 85.4 56.3
September 3 84.9 56.0
September 4 84.4 55.7
September 5 83.9 55.3
September 6 83.5 55.0
September 7 83.1 54.6
September 8 82.7 54.3
September 9 82.3 54.0
September 10 81.9 53.7
September 11 81.5 53.4
September 12 81.1 53.1
September 13 80.7 52.7
September 14 80.3 52.4
September 15 80.1 52.2
September 16 79.8 52.0
September 17 79.5 51.7
September 18 79.0 51.4
September 19 78.4 51.0
September 20 77.9 50.6
September 21 77.3 50.2
September 22 76.8 49.9
September 23 76.4 49.6
September 24 76.0 49.2
September 25 75.6 48.9
September 26 75.0 48.5
September 27 74.4 48.1
September 28 73.9 47.6
September 29 73.4 47.2
September 30 72.9 46.8
October 1 72.4 46.4
October 2 72.1 46.0
October 3 71.7 45.6
October 4 71.3 45.2
October 5 70.9 45.0
October 6 70.6 44.8
October 7 70.2 44.4
October 8 69.7 44.1
October 9 69.2 43.8
October 10 68.6 43.4
October 11 68.1 43.0
October 12 67.5 42.7
October 13 66.9 42.2
October 14 66.2 41.8
October 15 65.5 41.4
October 16 64.8 40.9
October 17 64.2 40.4
October 18 63.7 40.1
October 19 63.2 39.7
October 20 62.8 39.4
October 21 62.2 39.0
October 22 61.6 38.7
October 23 61.1 38.4
October 24 60.6 38.1
October 25 60.1 37.8
October 26 59.7 37.5
October 27 59.2 37.3
October 28 58.6 36.9
October 29 58.0 36.6
October 30 57.5 36.4
October 31 56.9 36.1
November 1 56.3 35.8
November 2 55.8 35.5
November 3 55.2 35.2
November 4 54.7 34.9
November 5 54.2 34.6
November 6 53.7 34.3
November 7 53.1 34.0
November 8 52.6 33.7
November 9 52.1 33.3
November 10 51.4 33.0
November 11 50.9 32.7
November 12 50.4 32.4
November 13 49.9 32.0
November 14 49.5 31.7
November 15 49.0 31.5
November 16 48.6 31.3
November 17 48.2 31.1
November 18 47.8 31.0
November 19 47.4 30.7
November 20 47.0 30.4
November 21 46.4 30.0
November 22 45.9 29.7
November 23 45.5 29.4
November 24 45.0 29.1
November 25 44.6 28.8
November 26 44.2 28.6
November 27 43.9 28.4
November 28 43.5 28.2
November 29 43.2 28.0
November 30 42.9 27.9
December 1 42.5 27.7
December 2 42.2 27.4
December 3 41.8 27.2
December 4 41.5 26.9
December 5 41.1 26.6
December 6 40.9 26.5
December 7 40.6 26.4
December 8 40.4 26.2
December 9 40.2 26.0
December 10 40.0 25.8
December 11 39.7 25.6
December 12 39.5 25.4
December 13 39.3 25.4
December 14 39.1 25.3
December 15 39.0 25.2
December 16 38.7 25.0
December 17 38.5 24.9
December 18 38.3 24.8
December 19 38.2 24.7
December 20 38.1 24.6
December 21 38.0 24.5
December 22 37.9 24.3
December 23 37.8 24.2
December 24 37.8 24.2
December 25 37.8 24.2
December 26 37.8 24.2
December 27 37.8 24.2
December 28 37.8 24.2
December 29 37.8 24.1
December 30 37.8 24.1
December 31 37.8 24.1
Weather Station Details
Years Station Coordinates
1940–2024 location
1911–1939 Meridian 1 W location
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