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As of 09:01 EDT

Weather in South Mount Vernon, OH

69°Current weather

South Mount Vernon, Sunday, 9 August, 09:01

Clear. Feels like 70°. High 86°, low 66°.

Pressure30.09 inHg
Wind4.9 mph NW
Humidity95%
Visibility6.2 mi
Dew point67°
Mon, 1087° / 68°0.78Heavy rain
87 °Heavy rain

South Mount Vernon, Monday, 10 August

Heavy rain. High 87°, low 68°.

Pressure29.97 inHg
Wind11.1 mph SW
Humidity80%
Visibility6.2 mi
Dew point67°
Tue, 1179° / 64°0.53Heavy rain
79 °Heavy rain

South Mount Vernon, Tuesday, 11 August

Heavy rain. High 79°, low 64°.

Pressure30.00 inHg
Wind11.3 mph W
Humidity88%
Visibility6.2 mi
Dew point70°
Wed, 1280° / 64°1.53Heavy rain
80 °Heavy rain

South Mount Vernon, Wednesday, 12 August

Heavy rain. High 80°, low 64°.

Pressure29.80 inHg
Wind11 mph SW
Humidity90%
Visibility6.2 mi
Dew point72°
Thu, 1379° / 63°0Partly cloudy
79 °Partly cloudy

South Mount Vernon, Thursday, 13 August

Partly cloudy. High 79°, low 63°.

Pressure29.97 inHg
Wind7.2 mph W
Humidity54%
Visibility—
Dew point59°
Fri, 1474° / 58°0Light rain
74 °Light rain

South Mount Vernon, Friday, 14 August

Light rain. High 74°, low 58°.

Pressure30.06 inHg
Wind11.5 mph N
Humidity60%
Visibility—
Dew point58°
Sat, 1572° / 54°0Overcast
72 °Overcast

South Mount Vernon, Saturday, 15 August

Overcast. High 72°, low 54°.

Pressure30.27 inHg
Wind7.1 mph NE
Humidity55%
Visibility—
Dew point53°
Sun, 1677° / 55°0.04Light rain
77 °Light rain

South Mount Vernon, Sunday, 16 August

Light rain. High 77°, low 55°.

Pressure30.06 inHg
Wind8.9 mph SE
Humidity80%
Visibility—
Dew point59°
Mon, 1770° / 61°0Light rain
70 °Light rain

South Mount Vernon, Monday, 17 August

Light rain. High 70°, low 61°.

Pressure30.03 inHg
Wind8.8 mph N
Humidity78%
Visibility—
Dew point61°
Tue, 1878° / 57°0Overcast
78 °Overcast

South Mount Vernon, Tuesday, 18 August

Overcast. High 78°, low 57°.

Pressure29.97 inHg
Wind6.6 mph SW
Humidity58%
Visibility—
Dew point59°
Wed, 1981° / 63°0.04Light rain
81 °Light rain

South Mount Vernon, Wednesday, 19 August

Light rain. High 81°, low 63°.

Pressure29.71 inHg
Wind13.4 mph NW
Humidity72%
Visibility—
Dew point69°
Thu, 2070° / 56°0Overcast
70 °Overcast

South Mount Vernon, Thursday, 20 August

Overcast. High 70°, low 56°.

Pressure29.91 inHg
Wind9.8 mph N
Humidity60%
Visibility—
Dew point55°
Fri, 2174° / 53°0Clear
74 °Clear

South Mount Vernon, Friday, 21 August

Clear. High 74°, low 53°.

Pressure29.94 inHg
Wind7.9 mph SW
Humidity55%
Visibility—
Dew point54°
Sat, 2281° / 60°0.35Rain
81 °Rain

South Mount Vernon, Saturday, 22 August

Rain. High 81°, low 60°.

Pressure29.80 inHg
Wind13.4 mph SW
Humidity66%
Visibility—
Dew point66°
Sun, 2372° / 58°0Overcast
72 °Overcast

South Mount Vernon, Sunday, 23 August

Overcast. High 72°, low 58°.

Pressure30.06 inHg
Wind12.1 mph N
Humidity66%
Visibility—
Dew point56°
Mon, 2475° / 54°0Clear
75 °Clear

South Mount Vernon, Monday, 24 August

Clear. High 75°, low 54°.

Pressure30.21 inHg
Wind6.7 mph N
Humidity49%
Visibility—
Dew point51°

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 South Mount Vernon, 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 South Mount Vernon, 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.