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As of 09:47 EDT

Weather in Port Jefferson, OH

76°Current weather

Port Jefferson, Sunday, 9 August, 09:47

Clear. Feels like 76°. High 88°, low 66°.

Pressure30.09 inHg
Wind2 mph SE
Humidity73%
Visibility6.2 mi
Dew point65°
Mon, 1090° / 69°1.02Heavy rain
90 °Heavy rain

Port Jefferson, Monday, 10 August

Heavy rain. High 90°, low 69°.

Pressure29.97 inHg
Wind19.9 mph S
Humidity85%
Visibility6.2 mi
Dew point70°
Tue, 1181° / 63°2.72Heavy rain
81 °Heavy rain

Port Jefferson, Tuesday, 11 August

Heavy rain. High 81°, low 63°.

Pressure30.00 inHg
Wind7.3 mph S
Humidity94%
Visibility6.2 mi
Dew point70°
Wed, 1280° / 65°0.8Heavy rain
80 °Heavy rain

Port Jefferson, Wednesday, 12 August

Heavy rain. High 80°, low 65°.

Pressure29.80 inHg
Wind7.2 mph W
Humidity83%
Visibility6.2 mi
Dew point73°
Thu, 1378° / 62°0.04Light rain
78 °Light rain

Port Jefferson, Thursday, 13 August

Light rain. High 78°, low 62°.

Pressure29.97 inHg
Wind7.9 mph SE
Humidity68%
Visibility—
Dew point64°
Fri, 1472° / 60°0.17Light rain
72 °Light rain

Port Jefferson, Friday, 14 August

Light rain. High 72°, low 60°.

Pressure30.09 inHg
Wind12.2 mph NE
Humidity81%
Visibility—
Dew point65°
Sat, 1572° / 55°0Overcast
72 °Overcast

Port Jefferson, Saturday, 15 August

Overcast. High 72°, low 55°.

Pressure30.27 inHg
Wind9.7 mph E
Humidity67%
Visibility—
Dew point57°
Sun, 1677° / 59°0.06Light rain
77 °Light rain

Port Jefferson, Sunday, 16 August

Light rain. High 77°, low 59°.

Pressure29.97 inHg
Wind10.3 mph SE
Humidity87%
Visibility—
Dew point64°
Mon, 1770° / 62°0.02Light rain
70 °Light rain

Port Jefferson, Monday, 17 August

Light rain. High 70°, low 62°.

Pressure30.06 inHg
Wind9 mph NW
Humidity82%
Visibility—
Dew point63°
Tue, 1876° / 58°0Overcast
76 °Overcast

Port Jefferson, Tuesday, 18 August

Overcast. High 76°, low 58°.

Pressure29.94 inHg
Wind7.3 mph S
Humidity70%
Visibility—
Dew point62°
Wed, 1981° / 63°0.07Light rain
81 °Light rain

Port Jefferson, Wednesday, 19 August

Light rain. High 81°, low 63°.

Pressure29.74 inHg
Wind14.1 mph NW
Humidity76%
Visibility—
Dew point70°
Thu, 2070° / 57°0Overcast
70 °Overcast

Port Jefferson, Thursday, 20 August

Overcast. High 70°, low 57°.

Pressure29.91 inHg
Wind8.8 mph N
Humidity68%
Visibility—
Dew point57°
Fri, 2175° / 54°0.03Light rain
75 °Light rain

Port Jefferson, Friday, 21 August

Light rain. High 75°, low 54°.

Pressure29.91 inHg
Wind8.8 mph SW
Humidity76%
Visibility—
Dew point62°
Sat, 2279° / 63°0.2Light rain
79 °Light rain

Port Jefferson, Saturday, 22 August

Light rain. High 79°, low 63°.

Pressure29.80 inHg
Wind13.8 mph SW
Humidity82%
Visibility—
Dew point71°
Sun, 2372° / 57°0Clear
72 °Clear

Port Jefferson, Sunday, 23 August

Clear. High 72°, low 57°.

Pressure30.09 inHg
Wind12.8 mph N
Humidity63%
Visibility—
Dew point56°
Mon, 2474° / 55°0Clear
74 °Clear

Port Jefferson, Monday, 24 August

Clear. High 74°, low 55°.

Pressure30.21 inHg
Wind6.4 mph N
Humidity61%
Visibility—
Dew point57°

About the monthly outlook

How accurate is a 30-day forecast?

The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Port Jefferson, OH are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.

What does "above normal" mean?

We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.

Where do the 66-year records come from?

They are real temperature extremes recorded in Port Jefferson, OH since 1960: the highest and lowest reading for each calendar date, with the year it happened.

How often is it updated?

The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.