As of 15:01 EDT

Weather in Merrimac, MA

61°Current weather

Merrimac, Friday, 16 October, 15:01

Overcast. Feels like 62°. High 64°, low 44°.

Pressure29.59 inHg
Wind9.2 mph SW
Humidity97%
Visibility6.2 mi
Dew point61°

Monthly outlook for Merrimac, MA: average high 58.9°, average low 39.3°. That is 0.5° above the climate normal for October. Precipitation is expected on 3 days (about 0.4 inches), against a normal of 5 days and 2.0 inches. The warmest day looks like 31 October (68.6°), the coolest 18 October (29.3°).

58.9°/39.3°
Average high / low
+0.5°
Above normal
3 / 5
Wet days / normal
0.4 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
16 October – 25 October56.7°59.2°-1.4°
26 October – 4 November62.5°55.7°+3.8°
5 November – 14 Novemberat normal51.2°—

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).

Sat, 1754° / 30°0Overcast
54 °Overcast

Merrimac, Saturday, 17 October

Overcast. High 54°, low 30°.

Pressure30.12 inHg
Wind14.1 mph NW
Humidity50%
Visibility6.2 mi
Dew point28°
Sun, 1854° / 29°0Clear
54 °Clear

Merrimac, Sunday, 18 October

Clear. High 54°, low 29°.

Pressure30.59 inHg
Wind1.2 mph S
Humidity45%
Visibility6.2 mi
Dew point25°
Mon, 1955° / 35°0Overcast
55 °Overcast

Merrimac, Monday, 19 October

Overcast. High 55°, low 35°.

Pressure30.50 inHg
Wind4.3 mph E
Humidity57%
Visibility6.2 mi
Dew point39°
Tue, 2063° / 39°0Overcast
63 °Overcast

Merrimac, Tuesday, 20 October

Overcast. High 63°, low 39°.

Pressure30.21 inHg
Wind7.7 mph NE
Humidity54%
Visibility6.2 mi
Dew point42°
Wed, 2155° / 41°0Clear
55 °Clear

Merrimac, Wednesday, 21 October

Clear. High 55°, low 41°.

Pressure30.42 inHg
Wind10.2 mph NE
Humidity51%
Visibility—
Dew point33°
Thu, 2251° / 41°0Overcast
51 °Overcast

Merrimac, Thursday, 22 October

Overcast. High 51°, low 41°.

Pressure30.42 inHg
Wind7.2 mph E
Humidity70%
Visibility—
Dew point38°
Fri, 2363° / 40°0Clear
63 °Clear

Merrimac, Friday, 23 October

Clear. High 63°, low 40°.

Pressure30.03 inHg
Wind11 mph NW
Humidity49%
Visibility—
Dew point36°
Sat, 2455° / 36°0Partly cloudy
55 °Partly cloudy

Merrimac, Saturday, 24 October

Partly cloudy. High 55°, low 36°.

Pressure30.30 inHg
Wind4.3 mph N
Humidity48%
Visibility—
Dew point29°
Sun, 2553° / 36°0Clear
53 °Clear

Merrimac, Sunday, 25 October

Clear. High 53°, low 36°.

Pressure30.50 inHg
Wind6.7 mph E
Humidity61%
Visibility—
Dew point36°
Mon, 2662° / 41°0Overcast
62 °Overcast

Merrimac, Monday, 26 October

Overcast. High 62°, low 41°.

Pressure30.39 inHg
Wind3 mph NW
Humidity62%
Visibility—
Dew point39°
Tue, 2757° / 41°0Overcast
57 °Overcast

Merrimac, Tuesday, 27 October

Overcast. High 57°, low 41°.

Pressure30.33 inHg
Wind7.6 mph E
Humidity60%
Visibility—
Dew point39°
Wed, 2859° / 40°0Overcast
59 °Overcast

Merrimac, Wednesday, 28 October

Overcast. High 59°, low 40°.

Pressure30.30 inHg
Wind5.3 mph SW
Humidity68%
Visibility—
Dew point42°
Thu, 2964° / 46°0.07Light rain
64 °Light rain

Merrimac, Thursday, 29 October

Light rain. High 64°, low 46°.

Pressure30.18 inHg
Wind7.9 mph NW
Humidity67%
Visibility—
Dew point48°
Fri, 3065° / 42°0.01Light rain
65 °Light rain

Merrimac, Friday, 30 October

Light rain. High 65°, low 42°.

Pressure30.21 inHg
Wind9.9 mph SW
Humidity64%
Visibility—
Dew point42°
Sat, 3169° / 46°0.1Light rain
69 °Light rain

Merrimac, Saturday, 31 October

Light rain. High 69°, low 46°.

Pressure30.00 inHg
Wind11.8 mph NE
Humidity72%
Visibility—
Dew point55°
From day 17 onward the outlook is built from 60-year climate statistics
Sun, 0157° / 42°0.11Climate normal
57 °Climate normal

Merrimac, Sunday, 1 November

Climate normal for this date — 60-year average.

Average high57°
Average low42°
Average precipitation0.11 in
Chance of precipitation28%
Record high75° (1974)
Record low31° (2020)
Mon, 0256° / 42°0.09Climate normal
56 °Climate normal

Merrimac, Monday, 2 November

Climate normal for this date — 60-year average.

Average high56°
Average low42°
Average precipitation0.09 in
Chance of precipitation28%
Record high72° (1982)
Record low28° (1965)
Tue, 0356° / 41°0.2Climate normal
56 °Climate normal

Merrimac, Tuesday, 3 November

Climate normal for this date — 60-year average.

Average high56°
Average low41°
Average precipitation0.2 in
Chance of precipitation37%
Record high73° (2017)
Record low26° (2002)
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)

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.