As of 17:07 EDT

Weather in South Merrimack, NH

86°

South Merrimack, Sunday, 9 August, 17:07

Clear. Feels like 88°. High 87°, low 69°.

Pressure29.88 inHg

Wind10 mph W

Humidity52%

Visibility6.2 mi

Dew point66°

See detailed hourly forecast

Mon, 1090° / 65°

0.09

90 °

South Merrimack, Monday, 10 August

Light rain. High 90°, low 65°.

Pressure29.94 inHg

Wind5.9 mph S

Humidity41%

Visibility6.2 mi

Dew point58°

Tue, 1185° / 66°

0.01

85 °

South Merrimack, Tuesday, 11 August

Light rain. High 85°, low 66°.

Pressure29.77 inHg

Wind10.7 mph NW

Humidity38%

Visibility6.2 mi

Dew point55°

Wed, 1271° / 60°

71 °

South Merrimack, Wednesday, 12 August

Light rain. High 71°, low 60°.

Pressure29.80 inHg

Wind1.4 mph SW

Humidity80%

Visibility6.2 mi

Dew point61°

Thu, 1382° / 60°

82 °

South Merrimack, Thursday, 13 August

Mostly clear. High 82°, low 60°.

Pressure29.74 inHg

Wind11.4 mph NW

Humidity40%

Visibility6.2 mi

Dew point54°

Fri, 1475° / 56°

75 °

South Merrimack, Friday, 14 August

Overcast. High 75°, low 56°.

Pressure30.03 inHg

Wind11.3 mph NW

Humidity42%

Visibility—

Dew point44°

Sat, 1578° / 53°

78 °

South Merrimack, Saturday, 15 August

Overcast. High 78°, low 53°.

Pressure30.18 inHg

Wind5.3 mph N

Humidity39%

Visibility—

Dew point43°

Sun, 1673° / 56°

0.56

73 °

South Merrimack, Sunday, 16 August

Rain. High 73°, low 56°.

Pressure30.00 inHg

Wind16.7 mph S

Humidity80%

Visibility—

Dew point59°

Mon, 1775° / 61°

0.05

75 °

South Merrimack, Monday, 17 August

Light rain. High 75°, low 61°.

Pressure29.83 inHg

Wind13.5 mph NW

Humidity68%

Visibility—

Dew point55°

Tue, 1883° / 60°

83 °

South Merrimack, Tuesday, 18 August

Partly cloudy. High 83°, low 60°.

Pressure30.06 inHg

Wind5.5 mph W

Humidity44%

Visibility—

Dew point53°

Wed, 1984° / 67°

0.03

84 °

South Merrimack, Wednesday, 19 August

Light rain. High 84°, low 67°.

Pressure29.83 inHg

Wind11.7 mph W

Humidity92%

Visibility—

Dew point68°

Thu, 2083° / 57°

83 °

South Merrimack, Thursday, 20 August

Partly cloudy. High 83°, low 57°.

Pressure29.94 inHg

Wind6.2 mph SW

Humidity44%

Visibility—

Dew point50°

Fri, 2181° / 65°

0.06

81 °

South Merrimack, Friday, 21 August

Light rain. High 81°, low 65°.

Pressure29.74 inHg

Wind11 mph SW

Humidity65%

Visibility—

Dew point63°

Sat, 2275° / 60°

0.01

75 °

South Merrimack, Saturday, 22 August

Light rain. High 75°, low 60°.

Pressure29.94 inHg

Wind6.1 mph SE

Humidity64%

Visibility—

Dew point59°

Sun, 2385° / 59°

85 °

South Merrimack, Sunday, 23 August

Clear. High 85°, low 59°.

Pressure30.06 inHg

Wind6.3 mph S

Humidity58%

Visibility—

Dew point59°

Mon, 2489° / 61°

89 °

South Merrimack, Monday, 24 August

Mostly clear. High 89°, low 61°.

Pressure29.94 inHg

Wind10.3 mph SW

Humidity52%

Visibility—

Dew point62°

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 South 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 South 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.