Weather in Merrimac, MA
Merrimac, Wednesday, 21 October, 02:20
Clear. Feels like 42°. High 58°, low 36°.
Monthly outlook for Merrimac, MA: average high 55.5°, average low 36°. That is 0.6° below the climate normal for October. Precipitation is expected on 1 day (about 1.2 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 27 October (67.4°), the coolest 5 November (28.8°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 21 October – 30 October | 58.3° | 57.4° | +0.5° |
| 31 October – 9 November | 50.8° | 54.2° | -1.9° |
| 10 November – 19 November | at normal | 48.8° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Lawrence (12 mi).
0
Merrimac, Thursday, 22 October
Overcast. High 64°, low 37°.
0
Merrimac, Friday, 23 October
Clear. High 52°, low 37°.
0Merrimac, Saturday, 24 October
Clear. High 57°, low 32°.
0Merrimac, Sunday, 25 October
Clear. High 63°, low 37°.
0Merrimac, Monday, 26 October
Clear. High 67°, low 39°.
0Merrimac, Tuesday, 27 October
Overcast. High 67°, low 49°.
0.02
Merrimac, Wednesday, 28 October
Light rain. High 49°, low 34°.
0Merrimac, Thursday, 29 October
Overcast. High 52°, low 29°.
0.01Merrimac, Friday, 30 October
Light rain. High 54°, low 41°.
0Merrimac, Saturday, 31 October
Clear. High 49°, low 34°.
0Merrimac, Sunday, 1 November
Overcast. High 57°, low 32°.
1.15Merrimac, Monday, 2 November
Rain. High 63°, low 46°.
0Merrimac, Tuesday, 3 November
Overcast. High 48°, low 35°.
0Merrimac, Wednesday, 4 November
Clear. High 44°, low 30°.
0Merrimac, Thursday, 5 November
Clear. High 44°, low 29°.
0.12
Merrimac, Friday, 6 November
Climate normal for this date — 60-year average.
0.05
Merrimac, Saturday, 7 November
Climate normal for this date — 60-year average.
0.09
Merrimac, 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.
0.15Merrimac, Friday, 13 November
Climate normal for this date — 60-year average.
0.12Merrimac, Saturday, 14 November
Climate normal for this date — 60-year average.
0.12Merrimac, Sunday, 15 November
Climate normal for this date — 60-year average.
0.15Merrimac, Monday, 16 November
Climate normal for this date — 60-year average.
0.14Merrimac, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.07Merrimac, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.06Merrimac, Thursday, 19 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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