Weather in Merrimac, MA
Merrimac, Wednesday, 14 October, 05:02
Overcast. Feels like 47°. High 69°, low 48°.
Monthly outlook for Merrimac, MA: average high 56.4°, average low 40.3°. That is 1.4° below the climate normal for October. Precipitation is expected on 4 days (about 1.2 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 14 October (69°), the coolest 29 October (33.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 14 October – 23 October | 60.9° | 60° | +0.5° |
| 24 October – 2 November | 48.8° | 56.3° | -4.2° |
| 3 November – 12 November | at normal | 52.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Lawrence (12 mi).
0Merrimac, Thursday, 15 October
Overcast. High 56°, low 47°.
0.55
Merrimac, Friday, 16 October
Rain. High 64°, low 47°.
0Merrimac, Saturday, 17 October
Light rain. High 61°, low 38°.
0
Merrimac, Sunday, 18 October
Clear. High 51°, low 34°.
0Merrimac, Monday, 19 October
Clear. High 65°, low 38°.
0Merrimac, Tuesday, 20 October
Overcast. High 67°, low 49°.
0
Merrimac, Wednesday, 21 October
Partly cloudy. High 65°, low 43°.
0.19Merrimac, Thursday, 22 October
Rain. High 63°, low 42°.
0
Merrimac, Friday, 23 October
Mostly clear. High 48°, low 37°.
0.36Merrimac, Saturday, 24 October
Rain. High 44°, low 38°.
0Merrimac, Sunday, 25 October
Partly cloudy. High 54°, low 39°.
0.02Merrimac, Monday, 26 October
Light rain. High 50°, low 38°.
0Merrimac, Tuesday, 27 October
Mostly clear. High 49°, low 36°.
0Merrimac, Wednesday, 28 October
Overcast. High 49°, low 35°.
0Merrimac, Thursday, 29 October
Overcast. High 47°, low 33°.
0.16Merrimac, Friday, 30 October
Climate normal for this date — 60-year average.
0.09Merrimac, Saturday, 31 October
Climate normal for this date — 60-year average.
0.11Merrimac, Sunday, 1 November
Climate normal for this date — 60-year average.
0.09Merrimac, Monday, 2 November
Climate normal for this date — 60-year average.
0.2
Merrimac, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.05Merrimac, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.17Merrimac, Thursday, 5 November
Climate normal for this date — 60-year average.
0.12Merrimac, Friday, 6 November
Climate normal for this date — 60-year average.
0.05Merrimac, Saturday, 7 November
Climate normal for this date — 60-year average.
0.09Merrimac, Sunday, 8 November
Climate normal for this date — 60-year average.
0.1Merrimac, Monday, 9 November
Climate normal for this date — 60-year average.
0.16Merrimac, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.11Merrimac, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.12Merrimac, 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 Merrimac, 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 Merrimac, 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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