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As of 22:07 EDT

Weather in Merrimack, NH

74°Current weather

Merrimack, Saturday, 8 August, 22:07

Mostly clear. Feels like 75°. High 87°, low 71°.

Pressure29.88 inHg
Wind4.8 mph W
Humidity87%
Visibility6.2 mi
Dew point69°
Sun, 0992° / 71°0Clear
92 °Clear

Merrimack, Sunday, 9 August

Clear. High 92°, low 71°.

Pressure29.88 inHg
Wind10.6 mph W
Humidity38%
Visibility6.2 mi
Dew point60°
Mon, 1090° / 66°0.06Rain
90 °Rain

Merrimack, Monday, 10 August

Rain. High 90°, low 66°.

Pressure29.91 inHg
Wind6.9 mph S
Humidity39%
Visibility6.2 mi
Dew point58°
Tue, 1187° / 66°0.06Light rain
87 °Light rain

Merrimack, Tuesday, 11 August

Light rain. High 87°, low 66°.

Pressure29.77 inHg
Wind12.1 mph NW
Humidity42%
Visibility6.2 mi
Dew point58°
Wed, 1272° / 61°0.35Rain
72 °Rain

Merrimack, Wednesday, 12 August

Rain. High 72°, low 61°.

Pressure29.77 inHg
Wind5 mph N
Humidity98%
Visibility6.2 mi
Dew point62°
Thu, 1379° / 60°0.03Light rain
79 °Light rain

Merrimack, Thursday, 13 August

Light rain. High 79°, low 60°.

Pressure29.68 inHg
Wind11.2 mph W
Humidity49%
Visibility—
Dew point55°
Fri, 1476° / 55°0Clear
76 °Clear

Merrimack, Friday, 14 August

Clear. High 76°, low 55°.

Pressure29.94 inHg
Wind10.6 mph NW
Humidity39%
Visibility—
Dew point42°
Sat, 1578° / 57°0Clear
78 °Clear

Merrimack, Saturday, 15 August

Clear. High 78°, low 57°.

Pressure30.00 inHg
Wind11.4 mph NW
Humidity47%
Visibility—
Dew point49°
Sun, 1679° / 55°0Clear
79 °Clear

Merrimack, Sunday, 16 August

Clear. High 79°, low 55°.

Pressure30.15 inHg
Wind7.6 mph N
Humidity34%
Visibility—
Dew point42°
Mon, 1782° / 53°0Overcast
82 °Overcast

Merrimack, Monday, 17 August

Overcast. High 82°, low 53°.

Pressure30.15 inHg
Wind11.1 mph S
Humidity42%
Visibility—
Dew point48°
Tue, 1873° / 63°0.54Rain
73 °Rain

Merrimack, Tuesday, 18 August

Rain. High 73°, low 63°.

Pressure30.12 inHg
Wind8.6 mph S
Humidity89%
Visibility—
Dew point62°
Wed, 1981° / 59°0Overcast
81 °Overcast

Merrimack, Wednesday, 19 August

Overcast. High 81°, low 59°.

Pressure29.97 inHg
Wind7.5 mph S
Humidity57%
Visibility—
Dew point57°
Thu, 2074° / 61°0.48Rain
74 °Rain

Merrimack, Thursday, 20 August

Rain. High 74°, low 61°.

Pressure29.62 inHg
Wind8.8 mph S
Humidity93%
Visibility—
Dew point66°
Fri, 2170° / 58°0Overcast
70 °Overcast

Merrimack, Friday, 21 August

Overcast. High 70°, low 58°.

Pressure29.65 inHg
Wind14 mph NW
Humidity60%
Visibility—
Dew point53°
Sat, 2277° / 53°0Clear
77 °Clear

Merrimack, Saturday, 22 August

Clear. High 77°, low 53°.

Pressure29.97 inHg
Wind9.7 mph NW
Humidity33%
Visibility—
Dew point38°
Sun, 2382° / 55°0.02Light rain
82 °Light rain

Merrimack, Sunday, 23 August

Light rain. High 82°, low 55°.

Pressure30.06 inHg
Wind9.2 mph SW
Humidity37%
Visibility—
Dew point45°

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.