St. Lawrence County, NY Weather Forecast
County weather hub
Showers And Thunderstorms Likely
Compare major city weather across St. Lawrence County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A chance of rain showers before 2pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 66. Southwest wind around 7 mph. Chance of precipitation is 60%.
County Weather Overview
This county weather page brings together forecast coverage for St. Lawrence County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 12 of 12 mapped cities in St. Lawrence County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Apr 15 to Apr 18, 2026
- Latest sync
- Apr 12, 2026 5:08 PM EDT
- Forecast office
- BTV
- Source
- NOAA / NWS
Daily Outlook
This Week in St. Lawrence County
Saturday looks like the warmest upcoming period in St. Lawrence County at 75 degrees F.
Friday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Thursday at about 7 to 10 mph SW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 12, 2026 5:08 PM EDT
- Coverage
- 4 days
- Time zone
- America/New_York
- Forecast office
- BTV
- Radar station
- KTYX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Showers and thunderstorms likely. Mostly cloudy, with a low around 55. Southwest wind around 6 mph. Chance of precipitation is 70%.
Rain showers likely. Mostly cloudy, with a high near 71. Southwest wind 7 to 10 mph. Chance of precipitation is 70%.
Rain showers likely. Mostly cloudy, with a low around 53. Southwest wind around 9 mph. Chance of precipitation is 70%.
A chance of rain showers. Partly sunny, with a high near 65. West wind around 7 mph. Chance of precipitation is 30%.
A slight chance of rain showers before 8pm. Partly cloudy, with a low around 50. South wind around 6 mph.
A chance of rain showers after 2pm. Mostly sunny, with a high near 75. South wind 7 to 10 mph. Chance of precipitation is 40%.
A chance of rain showers. Mostly cloudy, with a low around 51. Southwest wind around 10 mph. Chance of precipitation is 50%.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Apr 15
|
Showers And Thunderstorms Likely
|
66°F |
7 mph
SW
|
|
Wednesday Night
Apr 15
|
Showers And Thunderstorms Likely
|
55°F |
6 mph
SW
|
|
Thursday
Apr 16
|
Rain Showers Likely
|
71°F |
7 to 10 mph
SW
|
|
Thursday Night
Apr 16
|
Rain Showers Likely
|
53°F |
9 mph
SW
|
|
Friday
Apr 17
|
Chance Rain Showers
|
65°F |
7 mph
W
|
|
Friday Night
Apr 17
|
Slight Chance Rain Showers then Partly Cloudy
|
50°F |
6 mph
S
|
|
Saturday
Apr 18
|
Mostly Sunny then Chance Rain Showers
|
75°F |
7 to 10 mph
S
|
|
Saturday Night
Apr 18
|
Chance Rain Showers
|
51°F |
10 mph
SW
|
Major City Forecasts
Live forecast snapshots for major cities across St. Lawrence County.
Coverage
Forecast coverage currently spans 12 of 12 mapped cities in St. Lawrence County.
Largest mapped city population in this region: 10,388.
