St. Johnsbury, VT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Johnsbury, a community in Caledonia County, Vermont.
Today
82°F
Sunny
Sunny, with a high near 82. West wind 2 to 6 mph.
7-day forecast for St. Johnsbury
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Sunny | 2 to 6 mph W | 0% |
| Tonight | 57°F | Mostly Clear | 3 mph NW | 0% |
| Wednesday | 86°F | Mostly Sunny | 2 mph SW | 0% |
| Wednesday Night | 63°F | Partly Cloudy | 1 mph SW | 5% |
| Thursday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 1 mph S | 36% |
| Thursday Night | 67°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 1 mph W | 36% |
| Friday | 86°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 2 mph W | 48% |
| Friday Night | 64°F | Chance Showers And Thunderstorms | 1 mph NW | 48% |
| Saturday | 85°F | Chance Showers And Thunderstorms | 1 mph W | 49% |
| Saturday Night | 63°F | Chance Showers And Thunderstorms | 1 mph NW | 49% |
| Sunday | 87°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 3 mph W | 18% |
| Sunday Night | 63°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 2 mph SW | 26% |
| Monday | 85°F | Chance Rain Showers | 1 to 5 mph SW | 53% |
| Monday Night | 60°F | Chance Showers And Thunderstorms | 3 mph W | 53% |
Forecast source: National Weather Service (api.weather.gov) for St. Johnsbury (44.430, -72.009). Updated through the day.
Growing snapshot for St. Johnsbury
Last spring frost
May 13
First fall frost
Oct 3
Growing season
143 days
Hardiness zone
4b
More local growing data for St. Johnsbury: nearby ZIP 05819 weather · frost dates · planting calendar · Vermont frost dates
Nearby towns & communities
Barnet
Danville
East Burke
Groton
Hardwick
Lyndon
Lyndon Center
Lyndonville
Peacham
Sheffield
Sutton
West Burke
Climate data from the nearest NOAA station, Saint Johnsbury, Vt (2.1 mi from St. Johnsbury). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.