Saint John Average Weather by Day
Data and chart of the the average high and low temperature for every day of the year in
Saint John, New Brunswick , based on NOAA data.
Change city
What's the hottest day of the year in Saint John?
On average, July 27 is the hottest day of the year Saint John, New Brunswick. From 1991–2020, the average high temperature on July 27 was 23.5 °C and the average low was 11.8 °C.
What's the coldest day of the year in Saint John?
On average, January 30 is the coldest day of the year Saint John, New Brunswick. From 1991–2020, the average high temperature on January 30 was -2.8 °C, and the average low was -14.1 °C.
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 (°C)
High
Low
January 1
-0.9
-11.0
January 2
-1.0
-11.2
January 3
-1.1
-11.4
January 4
-1.2
-11.5
January 5
-1.3
-11.6
January 6
-1.4
-11.8
January 7
-1.7
-12.0
January 8
-2.0
-12.4
January 9
-2.1
-12.6
January 10
-2.1
-12.6
January 11
-2.1
-12.7
January 12
-2.3
-12.9
January 13
-2.4
-13.1
January 14
-2.4
-13.1
January 15
-2.3
-13.1
January 16
-2.4
-13.1
January 17
-2.4
-13.1
January 18
-2.4
-13.2
January 19
-2.5
-13.3
January 20
-2.5
-13.3
January 21
-2.5
-13.4
January 22
-2.5
-13.5
January 23
-2.6
-13.6
January 24
-2.5
-13.7
January 25
-2.6
-13.7
January 26
-2.7
-13.8
January 27
-2.7
-13.9
January 28
-2.8
-14.0
January 29
-2.8
-14.1
January 30
-2.8
-14.1
January 31
-2.8
-14.2
February 1
-2.7
-14.1
February 2
-2.6
-14.0
February 3
-2.6
-14.1
February 4
-2.5
-14.0
February 5
-2.3
-13.9
February 6
-2.1
-13.6
February 7
-2.1
-13.4
February 8
-2.0
-13.4
February 9
-2.0
-13.3
February 10
-1.8
-13.1
February 11
-1.7
-12.9
February 12
-1.7
-12.8
February 13
-1.6
-12.7
February 14
-1.5
-12.6
February 15
-1.4
-12.6
February 16
-1.3
-12.4
February 17
-1.2
-12.3
February 18
-1.1
-12.1
February 19
-1.1
-12.0
February 20
-1.0
-11.9
February 21
-0.8
-11.8
February 22
-0.7
-11.5
February 23
-0.5
-11.4
February 24
-0.3
-11.2
February 25
-0.2
-11.0
February 26
0.0
-10.8
February 27
0.1
-10.5
February 28
0.3
-10.3
March 1
0.4
-9.9
March 2
0.5
-9.7
March 3
0.6
-9.6
March 4
0.7
-9.5
March 5
0.8
-9.4
March 6
0.9
-9.3
March 7
1.0
-9.2
March 8
1.2
-9.1
March 9
1.2
-9.0
March 10
1.4
-8.8
March 11
1.5
-8.7
March 12
1.6
-8.6
March 13
1.8
-8.4
March 14
2.0
-8.2
March 15
2.3
-7.9
March 16
2.6
-7.5
March 17
2.7
-7.3
March 18
2.9
-7.1
March 19
3.1
-6.9
March 20
3.3
-6.6
March 21
3.5
-6.4
March 22
3.7
-6.1
March 23
3.8
-5.9
March 24
4.0
-5.7
March 25
4.2
-5.5
March 26
4.4
-5.3
March 27
4.5
-5.1
March 28
4.8
-4.9
March 29
5.0
-4.7
March 30
5.2
-4.6
March 31
5.4
-4.4
April 1
5.7
-4.1
April 2
5.9
-3.9
April 3
6.2
-3.6
April 4
6.4
-3.4
April 5
6.6
-3.2
April 6
6.9
-3.1
April 7
7.1
-2.8
April 8
7.5
-2.6
April 9
7.7
-2.3
April 10
7.9
-2.1
April 11
8.1
-2.0
April 12
8.3
-1.9
April 13
8.4
-1.8
April 14
8.6
-1.7
April 15
8.7
-1.6
April 16
9.0
-1.5
April 17
9.2
-1.4
April 18
9.5
-1.3
April 19
9.8
-1.1
April 20
10.1
-0.9
April 21
10.4
-0.7
April 22
10.6
-0.5
April 23
10.9
-0.3
April 24
11.1
-0.1
April 25
11.3
0.0
April 26
11.5
0.2
April 27
11.7
0.5
April 28
11.9
0.6
April 29
12.1
0.7
April 30
12.3
0.8
May 1
12.4
1.0
May 2
12.6
1.2
May 3
12.8
1.4
May 4
13.0
1.5
May 5
13.2
1.7
May 6
13.4
1.8
May 7
13.5
2.0
May 8
13.8
2.1
May 9
14.0
2.2
May 10
14.2
2.4
May 11
14.4
2.7
May 12
14.5
2.8
May 13
14.7
3.0
May 14
14.9
3.1
May 15
15.1
3.3
May 16
15.3
3.5
May 17
15.4
3.7
May 18
15.5
3.8
May 19
15.7
3.9
May 20
15.8
4.0
May 21
15.9
4.2
May 22
15.9
4.3
May 23
16.0
4.4
May 24
16.2
4.6
May 25
16.4
4.6
May 26
16.6
4.8
May 27
16.8
4.9
May 28
17.0
5.1
May 29
17.2
5.3
May 30
17.4
5.5
May 31
17.5
5.7
June 1
17.6
5.8
June 2
17.8
5.9
June 3
18.0
6.1
June 4
18.2
6.2
June 5
18.3
6.4
June 6
18.4
6.5
June 7
18.6
6.7
June 8
18.8
6.9
June 9
18.9
7.0
June 10
19.1
7.2
June 11
19.4
7.3
June 12
19.5
7.5
June 13
19.7
7.7
June 14
19.9
7.9
June 15
20.0
8.1
June 16
20.1
8.2
June 17
20.2
8.4
June 18
20.4
8.6
June 19
20.6
8.7
June 20
20.8
8.9
June 21
21.0
9.0
June 22
21.1
9.2
June 23
21.2
9.4
June 24
21.3
9.5
June 25
21.4
9.7
June 26
21.4
9.8
June 27
21.5
9.9
June 28
21.7
10.0
June 29
21.8
10.1
June 30
22.0
10.2
July 1
22.1
10.3
July 2
22.2
10.5
July 3
22.3
10.6
July 4
22.4
10.7
July 5
22.4
10.8
July 6
22.5
10.9
July 7
22.6
11.0
July 8
22.7
11.0
July 9
22.7
11.1
July 10
22.7
11.3
July 11
22.8
11.3
July 12
22.8
11.3
July 13
22.9
11.4
July 14
22.9
11.5
July 15
23.0
11.6
July 16
23.1
11.6
July 17
23.2
11.6
July 18
23.3
11.6
July 19
23.3
11.7
July 20
23.3
11.7
July 21
23.4
11.8
July 22
23.4
11.8
July 23
23.4
11.8
July 24
23.5
11.8
July 25
23.6
11.8
July 26
23.6
11.8
July 27
23.5
11.8
July 28
23.5
11.9
July 29
23.5
11.9
July 30
23.5
11.9
July 31
23.5
11.9
August 1
23.5
11.8
August 2
23.4
11.8
August 3
23.4
11.8
August 4
23.4
11.8
August 5
23.3
11.8
August 6
23.3
11.8
August 7
23.3
11.7
August 8
23.3
11.7
August 9
23.3
11.6
August 10
23.2
11.5
August 11
23.2
11.4
August 12
23.2
11.3
August 13
23.1
11.2
August 14
23.1
11.2
August 15
23.0
11.2
August 16
22.9
11.2
August 17
22.9
11.1
August 18
22.8
11.0
August 19
22.7
10.8
August 20
22.7
10.7
August 21
22.6
10.7
August 22
22.5
10.6
August 23
22.4
10.5
August 24
22.3
10.4
August 25
22.2
10.4
August 26
22.1
10.3
August 27
22.0
10.2
August 28
21.9
10.1
August 29
21.7
9.9
August 30
21.6
9.8
August 31
21.4
9.6
September 1
21.3
9.5
September 2
21.2
9.4
September 3
21.0
9.3
September 4
20.8
9.1
September 5
20.7
8.9
September 6
20.5
8.7
September 7
20.4
8.6
September 8
20.3
8.5
September 9
20.1
8.4
September 10
20.0
8.3
September 11
19.8
8.1
September 12
19.6
7.9
September 13
19.4
7.8
September 14
19.3
7.7
September 15
19.1
7.6
September 16
18.9
7.4
September 17
18.7
7.3
September 18
18.5
7.2
September 19
18.3
7.0
September 20
18.1
6.9
September 21
17.9
6.7
September 22
17.7
6.5
September 23
17.5
6.3
September 24
17.3
6.0
September 25
17.1
5.9
September 26
17.0
5.8
September 27
16.8
5.6
September 28
16.6
5.5
September 29
16.4
5.3
September 30
16.3
5.1
October 1
16.1
4.9
October 2
15.9
4.8
October 3
15.7
4.7
October 4
15.5
4.5
October 5
15.3
4.4
October 6
15.1
4.2
October 7
14.9
4.1
October 8
14.7
3.9
October 9
14.4
3.8
October 10
14.3
3.7
October 11
14.0
3.5
October 12
13.8
3.3
October 13
13.5
3.1
October 14
13.3
2.9
October 15
13.1
2.8
October 16
12.9
2.6
October 17
12.7
2.5
October 18
12.5
2.4
October 19
12.3
2.2
October 20
12.1
2.1
October 21
11.9
2.0
October 22
11.7
1.8
October 23
11.5
1.7
October 24
11.3
1.6
October 25
11.1
1.4
October 26
10.9
1.3
October 27
10.7
1.2
October 28
10.5
1.1
October 29
10.3
0.9
October 30
10.1
0.7
October 31
9.8
0.5
November 1
9.6
0.4
November 2
9.5
0.3
November 3
9.2
0.2
November 4
9.0
-0.1
November 5
8.7
-0.3
November 6
8.6
-0.4
November 7
8.4
-0.6
November 8
8.2
-0.8
November 9
8.0
-1.0
November 10
7.8
-1.2
November 11
7.6
-1.3
November 12
7.5
-1.4
November 13
7.3
-1.6
November 14
7.2
-1.7
November 15
7.0
-2.0
November 16
6.8
-2.2
November 17
6.6
-2.4
November 18
6.4
-2.5
November 19
6.3
-2.6
November 20
6.1
-2.8
November 21
5.8
-3.1
November 22
5.6
-3.3
November 23
5.4
-3.5
November 24
5.1
-3.8
November 25
4.8
-4.1
November 26
4.6
-4.3
November 27
4.5
-4.5
November 28
4.3
-4.7
November 29
4.2
-4.9
November 30
3.9
-5.1
December 1
3.7
-5.3
December 2
3.5
-5.6
December 3
3.4
-5.7
December 4
3.2
-5.8
December 5
2.9
-6.1
December 6
2.8
-6.4
December 7
2.6
-6.6
December 8
2.5
-6.7
December 9
2.4
-6.8
December 10
2.3
-6.9
December 11
2.1
-7.1
December 12
2.0
-7.4
December 13
1.7
-7.6
December 14
1.6
-7.8
December 15
1.4
-8.0
December 16
1.2
-8.3
December 17
1.0
-8.6
December 18
0.7
-8.9
December 19
0.5
-9.1
December 20
0.4
-9.4
December 21
0.3
-9.5
December 22
0.2
-9.7
December 23
0.1
-9.8
December 24
0.0
-9.8
December 25
-0.2
-10.0
December 26
-0.3
-10.2
December 27
-0.5
-10.3
December 28
-0.6
-10.5
December 29
-0.7
-10.6
December 30
-0.7
-10.7
December 31
-0.8
-10.8