Portville, NY Weather Forecast
Local 7-day forecast
Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Portville, NY in one place.
A chance of rain showers before 1pm. Mostly cloudy. High near 68, with temperatures falling to around 62 in the afternoon. West wind around 8 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Portville, NY is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: May 19, 2026 6:12 PM EDT.
The active forecast window currently covers May 20 to May 25, 2026 for Portville, NY.
Page Snapshot
- Page focus
- city weather
- Forecast window
- May 20 to May 25, 2026
- Latest sync
- May 19, 2026 6:12 PM EDT
- Forecast office
- BUF
- Source
- NOAA / NWS
Daily Outlook
This Week in Portville
Memorial Day looks like the warmest upcoming period in Portville at 75 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 39 degrees F.
The strongest winds are forecast for Friday Night at about 7 to 10 mph SE.
Precipitation is mentioned in 9 upcoming forecast periods.
Forecast Details
- Last updated
- May 19, 2026 6:12 PM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- BUF
- Radar station
- KBUF
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly cloudy, with a low around 39. North wind around 7 mph.
Mostly sunny, with a high near 63. Northeast wind around 7 mph.
Partly cloudy, with a low around 40.
A chance of rain showers after 8am. Mostly cloudy, with a high near 64. Chance of precipitation is 40%.
Rain showers. Mostly cloudy, with a low around 45. Chance of precipitation is 80%.
Rain showers before 2pm, then showers and thunderstorms. Cloudy, with a high near 58. Chance of precipitation is 90%.
Showers and thunderstorms. Mostly cloudy, with a low around 48. Chance of precipitation is 80%.
A chance of showers and thunderstorms. Mostly cloudy, with a high near 69. Chance of precipitation is 50%.
A chance of showers and thunderstorms. Mostly cloudy, with a low around 52. Chance of precipitation is 50%.
A chance of rain showers. Mostly cloudy, with a high near 75. Chance of precipitation is 30%.
A slight chance of rain showers. Mostly cloudy, with a low around 53.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
May 20
|
Chance Rain Showers
|
68°F |
8 mph
W
|
|
Wednesday Night
May 20
|
Mostly Cloudy
|
39°F |
7 mph
N
|
|
Thursday
May 21
|
Mostly Sunny
|
63°F |
7 mph
NE
|
|
Thursday Night
May 21
|
Partly Cloudy
|
40°F |
6 mph
E
|
|
Friday
May 22
|
Chance Rain Showers
|
64°F |
5 to 8 mph
SE
|
|
Friday Night
May 22
|
Rain Showers
|
45°F |
7 to 10 mph
SE
|
|
Saturday
May 23
|
Rain Showers
|
58°F |
10 mph
SE
|
|
Saturday Night
May 23
|
Showers And Thunderstorms
|
48°F |
9 mph
SE
|
|
Sunday
May 24
|
Chance Showers And Thunderstorms
|
69°F |
7 mph
S
|
|
Sunday Night
May 24
|
Chance Showers And Thunderstorms
|
52°F |
5 mph
S
|
|
Memorial Day
May 25
|
Chance Rain Showers
|
75°F |
1 to 5 mph
W
|
|
Monday Night
May 25
|
Slight Chance Rain Showers
|
53°F |
3 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Portville.