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As of 16:30 EDT

Weather in Groton, MA

86°Current weather

Groton, Saturday, 8 August, 16:30

Overcast. Feels like 93°. High 87°, low 71°.

Pressure29.85 inHg
Wind6 mph NW
Humidity64%
Visibility6.2 mi
Dew point73°
Sun, 0992° / 71°0Clear
92 °Clear

Groton, Sunday, 9 August

Clear. High 92°, low 71°.

Pressure29.88 inHg
Wind9.3 mph W
Humidity40%
Visibility6.2 mi
Dew point61°
Mon, 1088° / 68°0.05Light rain
88 °Light rain

Groton, Monday, 10 August

Light rain. High 88°, low 68°.

Pressure29.94 inHg
Wind6.8 mph S
Humidity41%
Visibility6.2 mi
Dew point59°
Tue, 1187° / 68°0Partly cloudy
87 °Partly cloudy

Groton, Tuesday, 11 August

Partly cloudy. High 87°, low 68°.

Pressure29.80 inHg
Wind12.4 mph NW
Humidity37%
Visibility6.2 mi
Dew point56°
Wed, 1268° / 60°0.07Light rain
68 °Light rain

Groton, Wednesday, 12 August

Light rain. High 68°, low 60°.

Pressure29.80 inHg
Wind4.2 mph NE
Humidity95%
Visibility6.2 mi
Dew point61°
Thu, 1385° / 60°0.08Light rain
85 °Light rain

Groton, Thursday, 13 August

Light rain. High 85°, low 60°.

Pressure29.71 inHg
Wind11.5 mph NW
Humidity89%
Visibility—
Dew point66°
Fri, 1477° / 54°0Clear
77 °Clear

Groton, Friday, 14 August

Clear. High 77°, low 54°.

Pressure29.88 inHg
Wind12 mph NW
Humidity42%
Visibility—
Dew point44°
Sat, 1576° / 54°0Clear
76 °Clear

Groton, Saturday, 15 August

Clear. High 76°, low 54°.

Pressure30.09 inHg
Wind8.6 mph NW
Humidity40%
Visibility—
Dew point43°
Sun, 1679° / 52°0Partly cloudy
79 °Partly cloudy

Groton, Sunday, 16 August

Partly cloudy. High 79°, low 52°.

Pressure30.27 inHg
Wind4.5 mph SW
Humidity35%
Visibility—
Dew point42°
Mon, 1781° / 57°0Overcast
81 °Overcast

Groton, Monday, 17 August

Overcast. High 81°, low 57°.

Pressure30.18 inHg
Wind8.8 mph SW
Humidity36%
Visibility—
Dew point46°
Tue, 1872° / 63°0.4Rain
72 °Rain

Groton, Tuesday, 18 August

Rain. High 72°, low 63°.

Pressure30.00 inHg
Wind7.1 mph S
Humidity98%
Visibility—
Dew point64°
Wed, 1978° / 62°0.07Light rain
78 °Light rain

Groton, Wednesday, 19 August

Light rain. High 78°, low 62°.

Pressure29.85 inHg
Wind6.2 mph E
Humidity60%
Visibility—
Dew point59°
Thu, 2074° / 60°0.13Light rain
74 °Light rain

Groton, Thursday, 20 August

Light rain. High 74°, low 60°.

Pressure30.00 inHg
Wind5.1 mph SE
Humidity65%
Visibility—
Dew point58°
Fri, 2176° / 59°0.86Rain
76 °Rain

Groton, Friday, 21 August

Rain. High 76°, low 59°.

Pressure30.00 inHg
Wind9.3 mph SW
Humidity59%
Visibility—
Dew point58°
Sat, 2276° / 62°0.59Rain
76 °Rain

Groton, Saturday, 22 August

Rain. High 76°, low 62°.

Pressure29.77 inHg
Wind7.9 mph S
Humidity89%
Visibility—
Dew point66°
Sun, 2370° / 57°0Mostly clear
70 °Mostly clear

Groton, Sunday, 23 August

Mostly clear. High 70°, low 57°.

Pressure29.80 inHg
Wind14.7 mph NW
Humidity43%
Visibility—
Dew point42°

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 Groton, 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 Groton, 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.