As of 21:53 EDT

Weather in Merrimac, MA

42°Current weather

Merrimac, Monday, 19 October, 21:53

Clear. Feels like 40°. High 61°, low 33°.

Pressure30.27 inHg
Wind3 mph N
Humidity92%
Visibility6.2 mi
Dew point39°

Monthly outlook for Merrimac, MA: average high 57.6°, average low 38°. That is 0.2° above the climate normal for October. Precipitation is expected on 1 day (about 0.4 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 26 October (68.3°), the coolest 30 October (30.5°).

57.6°/38°
Average high / low
+0.2°
Above normal
1 / 5
Wet days / normal
0.4 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
19 October – 28 October59.5°58.2°+0.7°
29 October – 7 November54.4°54.8°-0.2°
8 November – 17 Novemberat normal49.7°—

October records over 66 years

84.9°5 October 2007All-time high
25.2°31 October 2020All-time low

Climate normals and records are computed from the nearest reference point — Lawrence (12 mi).

Tue, 2065° / 37°0Clear
65 °Clear

Merrimac, Tuesday, 20 October

Clear. High 65°, low 37°.

Pressure30.27 inHg
Wind9.8 mph NE
Humidity46%
Visibility6.2 mi
Dew point41°
Wed, 2156° / 36°0Overcast
56 °Overcast

Merrimac, Wednesday, 21 October

Overcast. High 56°, low 36°.

Pressure30.27 inHg
Wind9.7 mph NE
Humidity53%
Visibility6.2 mi
Dew point36°
Thu, 2262° / 43°0Clear
62 °Clear

Merrimac, Thursday, 22 October

Clear. High 62°, low 43°.

Pressure29.85 inHg
Wind6.3 mph NW
Humidity40%
Visibility6.2 mi
Dew point34°
Fri, 2350° / 39°0Partly cloudy
50 °Partly cloudy

Merrimac, Friday, 23 October

Partly cloudy. High 50°, low 39°.

Pressure30.12 inHg
Wind13.2 mph N
Humidity54%
Visibility6.2 mi
Dew point30°
Sat, 2457° / 35°0Clear
57 °Clear

Merrimac, Saturday, 24 October

Clear. High 57°, low 35°.

Pressure30.39 inHg
Wind8.1 mph NW
Humidity49%
Visibility—
Dew point29°
Sun, 2562° / 35°0Clear
62 °Clear

Merrimac, Sunday, 25 October

Clear. High 62°, low 35°.

Pressure30.53 inHg
Wind5.9 mph SW
Humidity43%
Visibility—
Dew point30°
Mon, 2668° / 43°0Overcast
68 °Overcast

Merrimac, Monday, 26 October

Overcast. High 68°, low 43°.

Pressure30.18 inHg
Wind10 mph W
Humidity52%
Visibility—
Dew point40°
Tue, 2758° / 47°0Partly cloudy
58 °Partly cloudy

Merrimac, Tuesday, 27 October

Partly cloudy. High 58°, low 47°.

Pressure30.15 inHg
Wind5.8 mph S
Humidity49%
Visibility—
Dew point37°
Wed, 2855° / 38°0.01Light rain
55 °Light rain

Merrimac, Wednesday, 28 October

Light rain. High 55°, low 38°.

Pressure29.85 inHg
Wind9.9 mph NW
Humidity70%
Visibility—
Dew point39°
Thu, 2947° / 32°0Clear
47 °Clear

Merrimac, Thursday, 29 October

Clear. High 47°, low 32°.

Pressure29.88 inHg
Wind11.1 mph W
Humidity36%
Visibility—
Dew point15°
Fri, 3048° / 31°0Clear
48 °Clear

Merrimac, Friday, 30 October

Clear. High 48°, low 31°.

Pressure30.09 inHg
Wind8.6 mph W
Humidity37%
Visibility—
Dew point16°
Sat, 3156° / 36°0Clear
56 °Clear

Merrimac, Saturday, 31 October

Clear. High 56°, low 36°.

Pressure30.21 inHg
Wind10.6 mph W
Humidity44%
Visibility—
Dew point29°
Sun, 0156° / 32°0Mostly clear
56 °Mostly clear

Merrimac, Sunday, 1 November

Mostly clear. High 56°, low 32°.

Pressure30.50 inHg
Wind8 mph SW
Humidity58%
Visibility—
Dew point33°
Mon, 0263° / 46°0Overcast
63 °Overcast

Merrimac, Monday, 2 November

Overcast. High 63°, low 46°.

Pressure30.24 inHg
Wind7.4 mph SW
Humidity52%
Visibility—
Dew point38°
Tue, 0357° / 47°0.42Rain
57 °Rain

Merrimac, Tuesday, 3 November

Rain. High 57°, low 47°.

Pressure30.12 inHg
Wind10.6 mph SE
Humidity84%
Visibility—
Dew point46°
From day 17 onward the outlook is built from 60-year climate statistics
Wed, 0455° / 41°0.05Climate normal
55 °Climate normal

Merrimac, Wednesday, 4 November

Climate normal for this date — 60-year average.

Average high55°
Average low41°
Average precipitation0.05 in
Chance of precipitation22%
Record high73° (1987)
Record low29° (2020)
Thu, 0554° / 41°0.17Climate normal
54 °Climate normal

Merrimac, Thursday, 5 November

Climate normal for this date — 60-year average.

Average high54°
Average low41°
Average precipitation0.17 in
Chance of precipitation32%
Record high75° (2022)
Record low29° (1965)
Fri, 0653° / 41°0.12Climate normal
53 °Climate normal

Merrimac, Friday, 6 November

Climate normal for this date — 60-year average.

Average high53°
Average low41°
Average precipitation0.12 in
Chance of precipitation37%
Record high76° (2022)
Record low29° (2012)
Sat, 0753° / 39°0.05Climate normal
53 °Climate normal

Merrimac, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high53°
Average low39°
Average precipitation0.05 in
Chance of precipitation17%
Record high72° (2022)
Record low27° (2002)
Sun, 0852° / 38°0.09Climate normal
52 °Climate normal

Merrimac, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high52°
Average low38°
Average precipitation0.09 in
Chance of precipitation28%
Record high71° (2020)
Record low26° (1960)
Mon, 0952° / 38°0.1Climate normal
52 °Climate normal

Merrimac, Monday, 9 November

Climate normal for this date — 60-year average.

Average high52°
Average low38°
Average precipitation0.1 in
Chance of precipitation28%
Record high70° (2020)
Record low23° (2019)
Tue, 1052° / 38°0.16Climate normal
52 °Climate normal

Merrimac, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high52°
Average low38°
Average precipitation0.16 in
Chance of precipitation33%
Record high72° (2020)
Record low24° (2017)
Wed, 1151° / 38°0.11Climate normal
51 °Climate normal

Merrimac, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high51°
Average low38°
Average precipitation0.11 in
Chance of precipitation37%
Record high73° (2020)
Record low22° (2017)
Thu, 1249° / 37°0.12Climate normal
49 °Climate normal

Merrimac, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high49°
Average low37°
Average precipitation0.12 in
Chance of precipitation38%
Record high73° (2022)
Record low24° (1976)
Fri, 1348° / 35°0.15Climate normal
48 °Climate normal

Merrimac, Friday, 13 November

Climate normal for this date — 60-year average.

Average high48°
Average low35°
Average precipitation0.15 in
Chance of precipitation38%
Record high69° (1964)
Record low16° (2019)
Sat, 1448° / 35°0.12Climate normal
48 °Climate normal

Merrimac, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high48°
Average low35°
Average precipitation0.12 in
Chance of precipitation25%
Record high66° (1973)
Record low15° (1986)
Sun, 1549° / 36°0.12Climate normal
49 °Climate normal

Merrimac, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high49°
Average low36°
Average precipitation0.12 in
Chance of precipitation37%
Record high72° (1993)
Record low20° (2018)
Mon, 1649° / 35°0.15Climate normal
49 °Climate normal

Merrimac, Monday, 16 November

Climate normal for this date — 60-year average.

Average high49°
Average low35°
Average precipitation0.15 in
Chance of precipitation28%
Record high67° (2005)
Record low16° (1967)
Tue, 1747° / 34°0.14Climate normal
47 °Climate normal

Merrimac, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high47°
Average low34°
Average precipitation0.14 in
Chance of precipitation30%
Record high64° (2006)
Record low11° (1972)

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.