Port Jefferson, OH Weather Forecast
Local 7-day forecast
Mostly Cloudy
Track current conditions, temperature changes, wind, and the full daily outlook for Port Jefferson, OH in one place.
Mostly cloudy, with a low around 56. Northeast wind around 9 mph.
Local Weather Overview
This forecast page for Port Jefferson, OH 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: Oct 15, 2026 3:10 AM EDT.
The active forecast window currently covers Oct 15 to Oct 21, 2026 for Port Jefferson, OH.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 15 to Oct 21, 2026
- Latest sync
- Oct 15, 2026 3:10 AM EDT
- Forecast office
- ILN
- Source
- NOAA / NWS
Daily Outlook
This Week in Port Jefferson
Thursday looks like the warmest upcoming period in Port Jefferson at 73 degrees F.
Saturday Night is the coolest period ahead with temperatures near 33 degrees F.
The strongest winds are forecast for Friday at about 18 mph W.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 15, 2026 3:10 AM EDT
- Coverage
- 7 days
- Time zone
- America/New_York
- Forecast office
- ILN
- Radar station
- KILN
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A slight chance of rain showers between 10am and 2pm, then a slight chance of showers and thunderstorms. Mostly cloudy, with a high near 73. East wind 5 to 8 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
A slight chance of showers and thunderstorms between 7pm and 8pm, then showers and thunderstorms likely between 8pm and 9pm, then a chance of showers and thunderstorms between 9pm and 11pm, then showers and thunderstorms likely between 11pm and 1am, then showers and thunderstorms. Mostly cloudy. Low around 58, with temperatures rising to around 68 overnight. South wind 7 to 16 mph, with gusts as high as 29 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch possible.
Showers and thunderstorms. Mostly cloudy, with a high near 60. West wind around 18 mph, with gusts as high as 30 mph. Chance of precipitation is 80%. New rainfall amounts less than a tenth of an inch possible.
A chance of rain showers before 2am. Mostly cloudy, with a low around 38. Northwest wind 15 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
Sunny, with a high near 53.
Areas of frost after 2am. Clear, with a low around 33.
Widespread frost before 9am. Sunny, with a high near 62.
Mostly clear, with a low around 38.
Sunny, with a high near 67.
Partly cloudy, with a low around 41.
Mostly sunny, with a high near 67.
Mostly clear, with a low around 42.
Sunny, with a high near 68.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Oct 15
|
Mostly Cloudy
|
56°F |
9 mph
NE
|
|
Thursday
Oct 15
|
Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms
|
73°F |
5 to 8 mph
E
|
|
Thursday Night
Oct 15
|
Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
58°F |
7 to 16 mph
S
|
|
Friday
Oct 16
|
Showers And Thunderstorms
|
60°F |
18 mph
W
|
|
Friday Night
Oct 16
|
Chance Rain Showers
|
38°F |
15 to 18 mph
NW
|
|
Saturday
Oct 17
|
Sunny
|
53°F |
5 to 14 mph
N
|
|
Saturday Night
Oct 17
|
Clear then Areas Of Frost
|
33°F |
0 to 3 mph
SE
|
|
Sunday
Oct 18
|
Widespread Frost then Sunny
|
62°F |
2 to 7 mph
S
|
|
Sunday Night
Oct 18
|
Mostly Clear
|
38°F |
6 mph
S
|
|
Monday
Oct 19
|
Sunny
|
67°F |
3 to 7 mph
S
|
|
Monday Night
Oct 19
|
Partly Cloudy
|
41°F |
0 to 3 mph
SE
|
|
Tuesday
Oct 20
|
Mostly Sunny
|
67°F |
2 mph
N
|
|
Tuesday Night
Oct 20
|
Mostly Clear
|
42°F |
2 mph
NE
|
|
Wednesday
Oct 21
|
Sunny
|
68°F |
0 to 3 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Port Jefferson.