Weather in Groton, MA
Groton, Wednesday, 14 October, 09:24
Mostly clear. Feels like 62°. High 68°, low 54°.
Monthly outlook for Groton, MA: average high 60.8°, average low 41.5°. That is 1.4° above the climate normal for October. Precipitation is expected on 6 days (about 1.6 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 16 October (68°), the coolest 18 October (32.9°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 14 October – 23 October | 62.2° | 59.5° | +1.5° |
| 24 October – 2 November | 58.4° | 55.6° | +1.5° |
| 3 November – 12 November | at normal | 51.9° | — |
October records over 66 years
0
Groton, Thursday, 15 October
Partly cloudy. High 56°, low 43°.
0.09
Groton, Friday, 16 October
Rain. High 68°, low 42°.
0Groton, Saturday, 17 October
Mostly clear. High 60°, low 37°.
0
Groton, Sunday, 18 October
Clear. High 52°, low 33°.
0Groton, Monday, 19 October
Clear. High 64°, low 37°.
0Groton, Tuesday, 20 October
Partly cloudy. High 67°, low 44°.
0Groton, Wednesday, 21 October
Clear. High 65°, low 46°.
0.04Groton, Thursday, 22 October
Light rain. High 65°, low 44°.
0.13Groton, Friday, 23 October
Rain. High 57°, low 41°.
0
Groton, Saturday, 24 October
Overcast. High 61°, low 37°.
0.17Groton, Sunday, 25 October
Rain. High 64°, low 45°.
0Groton, Monday, 26 October
Clear. High 49°, low 38°.
0Groton, Tuesday, 27 October
Clear. High 55°, low 36°.
0Groton, Wednesday, 28 October
Clear. High 62°, low 41°.
1.13Groton, Thursday, 29 October
Rain. High 60°, low 50°.
0.16Groton, Friday, 30 October
Climate normal for this date — 60-year average.
0.09Groton, Saturday, 31 October
Climate normal for this date — 60-year average.
0.12Groton, Sunday, 1 November
Climate normal for this date — 60-year average.
0.09Groton, Monday, 2 November
Climate normal for this date — 60-year average.
0.17
Groton, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.04Groton, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.15Groton, Thursday, 5 November
Climate normal for this date — 60-year average.
0.13Groton, Friday, 6 November
Climate normal for this date — 60-year average.
0.05Groton, Saturday, 7 November
Climate normal for this date — 60-year average.
0.09Groton, Sunday, 8 November
Climate normal for this date — 60-year average.
0.1Groton, Monday, 9 November
Climate normal for this date — 60-year average.
0.15Groton, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.11Groton, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.13Groton, Thursday, 12 November
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, 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.
Sun and moon today
Weather history
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