Lewis County, NY Weather Forecast
County weather hub
Slight Chance Showers And Thunderstorms
Compare major city weather across Lewis County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
A slight chance of rain showers before 3pm, then a slight chance of showers and thunderstorms. Partly sunny, with a high near 69. Southwest wind 7 to 10 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
County Weather Overview
This county weather page brings together forecast coverage for Lewis County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 4 of 4 mapped cities in Lewis County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Apr 15 to Apr 21, 2026
- Latest sync
- Apr 15, 2026 2:08 PM EDT
- Forecast office
- BUF
- Source
- NOAA / NWS
Daily Outlook
This Week in Lewis County
Saturday looks like the warmest upcoming period in Lewis County at 73 degrees F.
Monday Night is the coolest period ahead with temperatures near 24 degrees F.
The strongest winds are forecast for Monday at about 10 to 14 mph W.
Precipitation is mentioned in 14 upcoming forecast periods.
Forecast Details
- Last updated
- Apr 15, 2026 2:08 PM EDT
- Coverage
- 7 days
- Time zone
- America/New_York
- Forecast office
- BUF
- Radar station
- KTYX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of showers and thunderstorms before 9pm, then rain showers and patchy fog. Mostly cloudy, with a low around 56. Southwest wind 2 to 6 mph. Chance of precipitation is 90%. New rainfall amounts less than a tenth of an inch possible.
Rain showers likely and patchy fog before 2pm, then showers and thunderstorms. Mostly cloudy, with a high near 70. South wind 5 to 12 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a low around 53. Southwest wind 2 to 9 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Showers and thunderstorms likely. Mostly cloudy, with a high near 63. Northwest wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch possible.
A slight chance of rain showers before 8pm. Partly cloudy, with a low around 48. Northeast wind around 5 mph. Chance of precipitation is 20%.
A chance of rain showers after 2pm. Partly sunny, with a high near 73. South wind 5 to 9 mph. Chance of precipitation is 30%.
A chance of rain showers before 8pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 40. South wind around 9 mph. Chance of precipitation is 70%.
Rain showers likely before 5pm, then rain and snow showers likely. Mostly cloudy, with a high near 51. Chance of precipitation is 60%.
Rain and snow showers likely. Mostly cloudy, with a low around 26. Chance of precipitation is 60%.
A chance of snow showers. Partly sunny, with a high near 38. Chance of precipitation is 30%.
A slight chance of snow showers before 8pm. Partly cloudy, with a low around 24.
A slight chance of rain showers after 2pm. Mostly sunny, with a high near 51.
A chance of rain showers. Mostly cloudy, with a low around 36.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
This Afternoon
Apr 15
|
Slight Chance Showers And Thunderstorms
|
69°F |
7 to 10 mph
SW
|
|
Tonight
Apr 15
|
Slight Chance Showers And Thunderstorms then Rain Showers
|
56°F |
2 to 6 mph
SW
|
|
Thursday
Apr 16
|
Showers And Thunderstorms
|
70°F |
5 to 12 mph
S
|
|
Thursday Night
Apr 16
|
Showers And Thunderstorms
|
53°F |
2 to 9 mph
SW
|
|
Friday
Apr 17
|
Showers And Thunderstorms Likely
|
63°F |
6 mph
NW
|
|
Friday Night
Apr 17
|
Slight Chance Rain Showers then Partly Cloudy
|
48°F |
5 mph
NE
|
|
Saturday
Apr 18
|
Partly Sunny then Chance Rain Showers
|
73°F |
5 to 9 mph
S
|
|
Saturday Night
Apr 18
|
Showers And Thunderstorms Likely
|
40°F |
9 mph
S
|
|
Sunday
Apr 19
|
Rain Showers Likely then Rain And Snow Showers Likely
|
51°F |
12 mph
SW
|
|
Sunday Night
Apr 19
|
Rain And Snow Showers Likely
|
26°F |
10 mph
W
|
|
Monday
Apr 20
|
Chance Snow Showers
|
38°F |
10 to 14 mph
W
|
|
Monday Night
Apr 20
|
Slight Chance Snow Showers then Partly Cloudy
|
24°F |
6 to 10 mph
W
|
|
Tuesday
Apr 21
|
Mostly Sunny then Slight Chance Rain Showers
|
51°F |
6 to 9 mph
SW
|
|
Tuesday Night
Apr 21
|
Chance Rain Showers
|
36°F |
7 mph
SW
|
Major City Forecasts
Live forecast snapshots for major cities across Lewis County.
Coverage
Forecast coverage currently spans 4 of 4 mapped cities in Lewis County.
Largest mapped city population in this region: 2,624.
