Most Monthly Precipitation in Saint John History

This is a list of the largest monthly precipitation totals ever recorded in Saint John, New Brunswick history from 1871–2024.
What Was the Wettest Month in Saint John History?
According to NOAA records, the most precipitation that Saint John, New Brunswick has ever received in a single month is 30.7 cm which occurred in December 1964.
Month to date though March 23, 2024: 17.6 cm
Saint John Most Rain in One Month
Rank Precipitation Month
1 30.7 cm December 1964
2 30.0 cm January 1952
2 30.0 cm January 1935
4 30.0 cm July 2023
5 29.6 cm January 1979
6 29.3 cm December 1990
7 28.5 cm November 1975
8 28.3 cm January 1978
9 28.2 cm December 2014
10 27.9 cm May 1979
11 27.9 cm December 1967
12 27.4 cm February 1947
13 27.3 cm January 1887
14 26.9 cm June 1985
15 26.5 cm August 1922
16 26.1 cm December 1975
17 25.9 cm December 1954
18 25.9 cm October 1900
19 25.6 cm December 1981
20 25.3 cm May 1897