St. Lawrence County, NY Weather Forecast
County weather hub
Mostly Sunny
Compare major city weather across St. Lawrence County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Mostly sunny, with a high near 53. North wind around 5 mph.
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
- Oct 15 to Oct 20, 2026
- Latest sync
- Oct 14, 2026 5:13 PM EDT
- Forecast office
- BTV
- Source
- NOAA / NWS
Daily Outlook
This Week in St. Lawrence County
Friday looks like the warmest upcoming period in St. Lawrence County at 60 degrees F.
Saturday Night is the coolest period ahead with temperatures near 27 degrees F.
The strongest winds are forecast for Saturday at about 13 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 14, 2026 5:13 PM EDT
- Coverage
- 6 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
Rain showers after 2am. Cloudy, with a low around 42. East wind 2 to 9 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Rain showers. Cloudy, with a high near 60. South wind 8 to 12 mph, with gusts as high as 23 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Rain showers before 2am, then a slight chance of rain and snow showers. Mostly cloudy, with a low around 30. Northwest wind around 12 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
A slight chance of snow showers before 8am. Mostly sunny, with a high near 43. Northwest wind around 13 mph.
Partly cloudy, with a low around 27. Southwest wind 2 to 8 mph.
Mostly sunny, with a high near 53. Southwest wind 3 to 12 mph.
Mostly clear, with a low around 37. Southwest wind around 10 mph.
Sunny, with a high near 60. Southwest wind 9 to 13 mph.
Partly cloudy, with a low around 39. Southwest wind 3 to 8 mph.
Mostly sunny, with a high near 60. Southwest wind around 6 mph.
Mostly clear, with a low around 36. South wind around 2 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Oct 15
|
Mostly Sunny
|
53°F |
5 mph
N
|
|
Thursday Night
Oct 15
|
Cloudy then Rain Showers
|
42°F |
2 to 9 mph
E
|
|
Friday
Oct 16
|
Rain Showers
|
60°F |
8 to 12 mph
S
|
|
Friday Night
Oct 16
|
Rain Showers then Slight Chance Rain And Snow Showers
|
30°F |
12 mph
NW
|
|
Saturday
Oct 17
|
Slight Chance Snow Showers then Mostly Sunny
|
43°F |
13 mph
NW
|
|
Saturday Night
Oct 17
|
Partly Cloudy
|
27°F |
2 to 8 mph
SW
|
|
Sunday
Oct 18
|
Mostly Sunny
|
53°F |
3 to 12 mph
SW
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
37°F |
10 mph
SW
|
|
Monday
Oct 19
|
Sunny
|
60°F |
9 to 13 mph
SW
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
39°F |
3 to 8 mph
SW
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
60°F |
6 mph
SW
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
36°F |
2 mph
S
|
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.
