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As of 05:40 EDT

Weather in South Dennis, MA

74°Current weather

South Dennis, Sunday, 9 August, 05:40

Clear. Feels like 76°. High 91°, low 72°.

Pressure29.88 inHg
Wind3 mph SW
Humidity93%
Visibility6.2 mi
Dew point72°
Mon, 1086° / 70°0Clear
86 °Clear

South Dennis, Monday, 10 August

Clear. High 86°, low 70°.

Pressure29.97 inHg
Wind6.7 mph S
Humidity53%
Visibility6.2 mi
Dew point62°
Tue, 1182° / 72°0.09Rain
82 °Rain

South Dennis, Tuesday, 11 August

Rain. High 82°, low 72°.

Pressure29.77 inHg
Wind5.7 mph W
Humidity68%
Visibility6.2 mi
Dew point66°
Wed, 1277° / 70°0.02Light rain
77 °Light rain

South Dennis, Wednesday, 12 August

Light rain. High 77°, low 70°.

Pressure29.77 inHg
Wind5 mph SE
Humidity50%
Visibility6.2 mi
Dew point58°
Thu, 1377° / 70°0.39Rain
77 °Rain

South Dennis, Thursday, 13 August

Rain. High 77°, low 70°.

Pressure29.68 inHg
Wind16.9 mph W
Humidity89%
Visibility—
Dew point69°
Fri, 1475° / 62°0Clear
75 °Clear

South Dennis, Friday, 14 August

Clear. High 75°, low 62°.

Pressure29.85 inHg
Wind19.7 mph NW
Humidity50%
Visibility—
Dew point48°
Sat, 1572° / 61°0Clear
72 °Clear

South Dennis, Saturday, 15 August

Clear. High 72°, low 61°.

Pressure29.94 inHg
Wind17.4 mph W
Humidity49%
Visibility—
Dew point48°
Sun, 1671° / 66°0Overcast
71 °Overcast

South Dennis, Sunday, 16 August

Overcast. High 71°, low 66°.

Pressure30.09 inHg
Wind12.4 mph NW
Humidity59%
Visibility—
Dew point55°
Mon, 1777° / 67°0.11Light rain
77 °Light rain

South Dennis, Monday, 17 August

Light rain. High 77°, low 67°.

Pressure30.03 inHg
Wind16.5 mph S
Humidity52%
Visibility—
Dew point56°
Tue, 1875° / 67°0.2Light rain
75 °Light rain

South Dennis, Tuesday, 18 August

Light rain. High 75°, low 67°.

Pressure30.03 inHg
Wind9.1 mph SW
Humidity61%
Visibility—
Dew point57°
Wed, 1976° / 67°0Light rain
76 °Light rain

South Dennis, Wednesday, 19 August

Light rain. High 76°, low 67°.

Pressure30.15 inHg
Wind7 mph W
Humidity66%
Visibility—
Dew point61°
Thu, 2079° / 69°0Mostly clear
79 °Mostly clear

South Dennis, Thursday, 20 August

Mostly clear. High 79°, low 69°.

Pressure30.09 inHg
Wind12.2 mph SW
Humidity67%
Visibility—
Dew point64°
Fri, 2180° / 73°0Overcast
80 °Overcast

South Dennis, Friday, 21 August

Overcast. High 80°, low 73°.

Pressure29.94 inHg
Wind18.9 mph SW
Humidity73%
Visibility—
Dew point68°
Sat, 2280° / 74°0.23Light rain
80 °Light rain

South Dennis, Saturday, 22 August

Light rain. High 80°, low 74°.

Pressure29.88 inHg
Wind15.4 mph SW
Humidity77%
Visibility—
Dew point71°
Sun, 2373° / 69°0.01Light rain
73 °Light rain

South Dennis, Sunday, 23 August

Light rain. High 73°, low 69°.

Pressure29.94 inHg
Wind11.3 mph NW
Humidity95%
Visibility—
Dew point69°
Mon, 2474° / 67°0Light rain
74 °Light rain

South Dennis, Monday, 24 August

Light rain. High 74°, low 67°.

Pressure30.03 inHg
Wind12.7 mph NE
Humidity76%
Visibility—
Dew point65°

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 Dennis, MA 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 Dennis, MA 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.