As of 20:11 EDT

Weather in Merrimack, NH

46°Current weather

Merrimack, Wednesday, 21 October, 20:11

Clear. Feels like 43°. High 58°, low 41°.

Pressure30.15 inHg
Wind5.7 mph NE
Humidity74%
Visibility6.2 mi
Dew point39°

Monthly outlook for Merrimack, NH: average high 57.8°, average low 37.4°. That is 1.4° above the climate normal for October. Precipitation is expected on 3 days (about 1.5 inches), against a normal of 5 days and 2.1 inches. The warmest day looks like 26 October (67.1°), the coolest 5 November (29.9°).

57.8°/37.4°
Average high / low
+1.4°
Above normal
3 / 5
Wet days / normal
1.5 in
Precipitation this month

Ten-day blocks vs climate normal

PeriodForecast highNormalDifference
21 October – 30 October58.5°56°+1.4°
31 October – 9 November56.7°52.6°+2.2°
10 November – 19 Novemberat normal47.2°—

October records over 66 years

84.7°5 October 2007All-time high
24.6°31 October 2020All-time low

Climate normals and records are computed from the nearest reference point — Bedford (6 mi).

Thu, 2267° / 40°0Clear
67 °Clear

Merrimack, Thursday, 22 October

Clear. High 67°, low 40°.

Pressure29.97 inHg
Wind9.1 mph N
Humidity33%
Visibility6.2 mi
Dew point27°
Fri, 2354° / 33°0Clear
54 °Clear

Merrimack, Friday, 23 October

Clear. High 54°, low 33°.

Pressure30.39 inHg
Wind5.9 mph N
Humidity49%
Visibility6.2 mi
Dew point29°
Sat, 2460° / 30°0Clear
60 °Clear

Merrimack, Saturday, 24 October

Clear. High 60°, low 30°.

Pressure30.53 inHg
Wind1.5 mph NW
Humidity40%
Visibility6.2 mi
Dew point26°
Sun, 2564° / 31°0Clear
64 °Clear

Merrimack, Sunday, 25 October

Clear. High 64°, low 31°.

Pressure30.50 inHg
Wind1.2 mph SW
Humidity34%
Visibility6.2 mi
Dew point30°
Mon, 2667° / 39°0Clear
67 °Clear

Merrimack, Monday, 26 October

Clear. High 67°, low 39°.

Pressure30.33 inHg
Wind6.4 mph NW
Humidity34%
Visibility—
Dew point30°
Tue, 2756° / 38°0Partly cloudy
56 °Partly cloudy

Merrimack, Tuesday, 27 October

Partly cloudy. High 56°, low 38°.

Pressure30.33 inHg
Wind6.5 mph NW
Humidity55%
Visibility—
Dew point37°
Wed, 2848° / 36°0Overcast
48 °Overcast

Merrimack, Wednesday, 28 October

Overcast. High 48°, low 36°.

Pressure30.42 inHg
Wind4.5 mph S
Humidity63%
Visibility—
Dew point31°
Thu, 2964° / 42°0.13Light rain
64 °Light rain

Merrimack, Thursday, 29 October

Light rain. High 64°, low 42°.

Pressure29.80 inHg
Wind15.8 mph W
Humidity97%
Visibility—
Dew point53°
Fri, 3047° / 34°0Clear
47 °Clear

Merrimack, Friday, 30 October

Clear. High 47°, low 34°.

Pressure29.83 inHg
Wind16.5 mph W
Humidity41%
Visibility—
Dew point19°
Sat, 3153° / 36°0.01Light rain
53 °Light rain

Merrimack, Saturday, 31 October

Light rain. High 53°, low 36°.

Pressure30.27 inHg
Wind9.9 mph W
Humidity45%
Visibility—
Dew point26°
Sun, 0163° / 39°0Overcast
63 °Overcast

Merrimack, Sunday, 1 November

Overcast. High 63°, low 39°.

Pressure30.33 inHg
Wind11 mph SW
Humidity52%
Visibility—
Dew point35°
Mon, 0264° / 48°0Overcast
64 °Overcast

Merrimack, Monday, 2 November

Overcast. High 64°, low 48°.

Pressure30.39 inHg
Wind3.6 mph W
Humidity62%
Visibility—
Dew point44°
Tue, 0361° / 51°0.74Rain
61 °Rain

Merrimack, Tuesday, 3 November

Rain. High 61°, low 51°.

Pressure29.91 inHg
Wind9.8 mph SW
Humidity94%
Visibility—
Dew point57°
Wed, 0451° / 33°0.62Rain
51 °Rain

Merrimack, Wednesday, 4 November

Rain. High 51°, low 33°.

Pressure30.33 inHg
Wind10.2 mph NW
Humidity66%
Visibility—
Dew point31°
Thu, 0547° / 30°0Clear
47 °Clear

Merrimack, Thursday, 5 November

Clear. High 47°, low 30°.

Pressure30.47 inHg
Wind5.7 mph S
Humidity50%
Visibility—
Dew point24°
From day 17 onward the outlook is built from 60-year climate statistics
Fri, 0651° / 39°0.13Climate normal
51 °Climate normal

Merrimack, Friday, 6 November

Climate normal for this date — 60-year average.

Average high51°
Average low39°
Average precipitation0.13 in
Chance of precipitation37%
Record high75° (2024)
Record low27° (2012)
Sat, 0751° / 37°0.05Climate normal
51 °Climate normal

Merrimack, Saturday, 7 November

Climate normal for this date — 60-year average.

Average high51°
Average low37°
Average precipitation0.05 in
Chance of precipitation23%
Record high72° (2020)
Record low25° (2002)
Sun, 0850° / 37°0.1Climate normal
50 °Climate normal

Merrimack, Sunday, 8 November

Climate normal for this date — 60-year average.

Average high50°
Average low37°
Average precipitation0.1 in
Chance of precipitation30%
Record high71° (2020)
Record low24° (1960)
Mon, 0950° / 36°0.1Climate normal
50 °Climate normal

Merrimack, Monday, 9 November

Climate normal for this date — 60-year average.

Average high50°
Average low36°
Average precipitation0.1 in
Chance of precipitation28%
Record high71° (2020)
Record low22° (1971)
Tue, 1051° / 37°0.15Climate normal
51 °Climate normal

Merrimack, Tuesday, 10 November

Climate normal for this date — 60-year average.

Average high51°
Average low37°
Average precipitation0.15 in
Chance of precipitation37%
Record high72° (2020)
Record low22° (2017)
Wed, 1149° / 36°0.12Climate normal
49 °Climate normal

Merrimack, Wednesday, 11 November

Climate normal for this date — 60-year average.

Average high49°
Average low36°
Average precipitation0.12 in
Chance of precipitation35%
Record high73° (2020)
Record low20° (2017)
Thu, 1248° / 35°0.13Climate normal
48 °Climate normal

Merrimack, Thursday, 12 November

Climate normal for this date — 60-year average.

Average high48°
Average low35°
Average precipitation0.13 in
Chance of precipitation38%
Record high71° (2022)
Record low21° (1976)
Fri, 1346° / 33°0.15Climate normal
46 °Climate normal

Merrimack, Friday, 13 November

Climate normal for this date — 60-year average.

Average high46°
Average low33°
Average precipitation0.15 in
Chance of precipitation37%
Record high67° (1964)
Record low14° (2019)
Sat, 1447° / 33°0.11Climate normal
47 °Climate normal

Merrimack, Saturday, 14 November

Climate normal for this date — 60-year average.

Average high47°
Average low33°
Average precipitation0.11 in
Chance of precipitation28%
Record high65° (1989)
Record low12° (1986)
Sun, 1547° / 34°0.13Climate normal
47 °Climate normal

Merrimack, Sunday, 15 November

Climate normal for this date — 60-year average.

Average high47°
Average low34°
Average precipitation0.13 in
Chance of precipitation38%
Record high69° (1993)
Record low19° (1967)
Mon, 1647° / 33°0.15Climate normal
47 °Climate normal

Merrimack, Monday, 16 November

Climate normal for this date — 60-year average.

Average high47°
Average low33°
Average precipitation0.15 in
Chance of precipitation30%
Record high66° (2005)
Record low13° (1967)
Tue, 1746° / 32°0.13Climate normal
46 °Climate normal

Merrimack, Tuesday, 17 November

Climate normal for this date — 60-year average.

Average high46°
Average low32°
Average precipitation0.13 in
Chance of precipitation30%
Record high64° (2006)
Record low11° (1972)
Wed, 1846° / 32°0.08Climate normal
46 °Climate normal

Merrimack, Wednesday, 18 November

Climate normal for this date — 60-year average.

Average high46°
Average low32°
Average precipitation0.08 in
Chance of precipitation25%
Record high66° (1963)
Record low21° (2020)
Thu, 1945° / 31°0.06Climate normal
45 °Climate normal

Merrimack, Thursday, 19 November

Climate normal for this date — 60-year average.

Average high45°
Average low31°
Average precipitation0.06 in
Chance of precipitation23%
Record high63° (1991)
Record low13° (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 Merrimack, NH 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 Merrimack, NH 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.