St. Johnsbury Average Temperature by Month

This page shows the average temperature in each month of the year in St. Johnsbury, Vermont. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in St. Johnsbury?
In St. Johnsbury, Vermont, the warmest month is July, with an average daily high temperature of 81.2 °F and an average low of 58.2 °F.
What's the Coldest Month in St. Johnsbury?
In St. Johnsbury, Vermont, the coolest month is January, with an average daily high temperature of 28.3 °F and an average low of 9.0 °F.
Month Avg. High Avg. Low
January 28.3 °F 9.0 °F
February 32.5 °F 10.3 °F
March 42.2 °F 19.9 °F
April 56.6 °F 32.0 °F
May 69.7 °F 43.6 °F
June 77.5 °F 53.3 °F
July 81.2 °F 58.2 °F
August 79.4 °F 56.6 °F
September 72.1 °F 49.3 °F
October 58.8 °F 38.2 °F
November 44.9 °F 28.3 °F
December 33.0 °F 17.2 °F
Year 56.5 °F 34.8 °F
Weather Station Details
Years Station Coordinates
1894–2024 St. Johnsbury location
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