Weather in Groton Long Point, CT
Groton Long Point, Sunday, 9 August, 03:34
Clear. Feels like 76°. High 90°, low 74°.
Monthly outlook for Groton Long Point, CT: average high 78.8°, average low 67.6°. That is 0° below the climate normal for August. Precipitation is expected on 7 days (about 0.9 inches), against a normal of 5 days and 2.2 inches. The warmest day looks like 9 August (89.6°), the coolest 15 August (60.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 79° | 79.5° | -0.3° |
| 19 August – 28 August | 78.5° | 78° | +0.3° |
| 29 August – 7 September | at normal | 76.5° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Fishers Island (3 mi).
0.02
Groton Long Point, Monday, 10 August
Light rain. High 85°, low 69°.
0.08Groton Long Point, Tuesday, 11 August
Light rain. High 81°, low 71°.
0
Groton Long Point, Wednesday, 12 August
Overcast. High 75°, low 68°.
0.31Groton Long Point, Thursday, 13 August
Rain. High 79°, low 68°.
0
Groton Long Point, Friday, 14 August
Clear. High 75°, low 61°.
0Groton Long Point, Saturday, 15 August
Clear. High 78°, low 60°.
0Groton Long Point, Sunday, 16 August
Overcast. High 78°, low 62°.
0.14Groton Long Point, Monday, 17 August
Light rain. High 76°, low 64°.
0.09Groton Long Point, Tuesday, 18 August
Light rain. High 75°, low 63°.
0.01Groton Long Point, Wednesday, 19 August
Light rain. High 76°, low 66°.
0
Groton Long Point, Thursday, 20 August
Partly cloudy. High 77°, low 70°.
0.06Groton Long Point, Friday, 21 August
Light rain. High 79°, low 72°.
0.13Groton Long Point, Saturday, 22 August
Light rain. High 81°, low 73°.
0Groton Long Point, Sunday, 23 August
Clear. High 80°, low 70°.
0.07Groton Long Point, Monday, 24 August
Light rain. High 78°, low 70°.
0.09Groton Long Point, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.09Groton Long Point, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11Groton Long Point, Thursday, 27 August
Climate normal for this date — 60-year average.
0.19
Groton Long Point, Friday, 28 August
Climate normal for this date — 60-year average.
0.17Groton Long Point, Saturday, 29 August
Climate normal for this date — 60-year average.
0.11Groton Long Point, Sunday, 30 August
Climate normal for this date — 60-year average.
0.05Groton Long Point, Monday, 31 August
Climate normal for this date — 60-year average.
0.08Groton Long Point, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.22Groton Long Point, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.12Groton Long Point, Thursday, 3 September
Climate normal for this date — 60-year average.
0.13Groton Long Point, Friday, 4 September
Climate normal for this date — 60-year average.
0.06
Groton Long Point, Saturday, 5 September
Climate normal for this date — 60-year average.
0.15Groton Long Point, Sunday, 6 September
Climate normal for this date — 60-year average.
0.11Groton Long Point, Monday, 7 September
Climate normal for this date — 60-year average.
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 Long Point, CT 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 Long Point, CT 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.
Sun and moon today
Weather history
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