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Shaded-relief atlas plate of Merrimac, Massachusetts: rivers, roads, the city limits and where the water drains.
MASSACHUSETTS · ESSEX COUNTY

Merrimac

6,810 people, 170 ft above sea level in Essex County.

170 ftElevation, city center
6,810People, 2024 estimate
8 sq miLand area
Sunny 66°
Sunny now Dew point 55° · NNW 6 mph · high 68°
City of Merrimac River Interstate 2 miles
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The Merrimac plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.

MILE1
TODAY

Today in Merrimac

NWS forecast and National Blend of Models · updated 2:00 PM EDT
RIGHT NOW Manchester Airport (KMHT) · 2:53 PM
Sunny
66° Sunny Feels like 66° · high of 68° near 3 PM
WindNNW 6 mphno gusts
Humidity68%rising to 100% by morning
Pressure29.92 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 55° · Comfortableabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Rain
Friday40% chance · showers
LIKELY AMOUNT—amounts come within 3 days
LAST RAINSept. 270.42 in · 2 dry days
ALERTS & OUTLOOKS
No watches or warnings for Essex County
NWS Norton and the Storm Prediction Center · checked 3:47 PM
SUN & MOON
↑ 6:38 AM6:29 PM ↓
11 h 51 m of daylight, 3 minutes less than yesterday
Waning gibbous, 89% lit. The Harvest Moon was full Saturday.
AIR & POLLEN
14
GOODAir quality index · fine particles
Tomorrow: None, good. No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
TUESDAY, SEPT. 29
WEDNESDAY, SEPT. 30
THURSDAY, OCT. 1
FRIDAY, OCT. 2
3p
6p
9p
Mid
3a
6a
9a
Noon
3p
6p
9p
Mid
3a
6a
9a
Noon
3p
6p
9p
Mid
3a
6a
9a
Noon
mostly cloudy day
partly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
partly cloudy day
partly cloudy day
partly cloudy day
partly cloudy day
partly cloudy night
partly cloudy night
partly cloudy night
mostly cloudy night
partly cloudy day
partly cloudy day
mostly sunny
partly cloudy day
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy night
partly cloudy day
partly cloudy day
partly cloudy day
TEMPERATURE °F
68°
53°
71°
55°
77°
64°
CHANCE OF RAIN
50%
WIND, MPH
7
5
3
0
0
0
0
0
0
2
1
0
0
0
3
8
10
8
7
6
5
5
6
10
HOW IT FEELS · DEW POINT
Comfortable: dew points 52 to 61°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 69° / 49°
TUE Sept. 29 Mostly cloudy Mostly cloudy
68° 53°
0% rain — NNW 6 A
WED Sept. 30 Partly cloudy Partly cloudy
73° 55°
0% rain — NNW 0 B
THU Oct. 1 Partly cloudy Partly cloudy
80° 64°
0% rain — SW 6 B
FRI Oct. 2 Chance of showers Chance of showers
81° 55°
40% rain up to 0.1″ W 10 C
SAT Oct. 3 Mostly sunny; cooler Mostly sunny; cooler
70° 44°
10% rain — N 6 B
SUN Oct. 4 Chance of showers Chance of showers
66° 45°
40% rain up to 0.7″ SE 7 C
MON Oct. 5 Mostly sunny Mostly sunny
65° 39°
10% rain — NW 12 C
How sure are we? AModels agree: highs within 4° BSome spread: within 8° CWide spread: check back
Range from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL

Where today’s air came from

The air arriving over Merrimac about 5,000 feet above the ground was over New England three days ago, and over the western Atlantic a day ago, about 1,790 miles back along its path. The nine paths traced from around the city fan out, so treat that as a best guess. It rose from near the ground on the way. Near the ground the air came from Canada; at 10,000 feet, from the western Atlantic. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.

MILE7
ON THE NETWORK

Around Merrimac on the Forecast Network

Neighboring plates

Cambridge MA · 32 MI 32 miles south Boston MA · 35 MI 35 miles south Worcester MA · 56 MI 56 miles southwest Providence RI · 73 MI 73 miles south Springfield MA · 93 MI 93 miles southwest New Haven CT · 144 MI 144 miles southwest
FORECASTCITY
Atlas plate of Merrimac, Massachusetts. Explore the plate
MASSACHUSETTS · ESSEX

Merrimac

6,810 people, 170 ft above sea level in Essex County.

170 ftElevation
6,810People
8 sq miLand
Sunny 66°
SunnyDew point 55°
1

Today in Merrimac

NEXT 15 HOURS
Now mostly cloudy day 68° 1%
6p mostly cloudy day 65° 2%
9p partly cloudy night 60° 1%
12a mostly cloudy night 57° 1%
3a mostly cloudy night 55° 1%
6a mostly cloudy night 53° 0%
Rain
NEXT RAINFriday · 40%
→
Tue0%
Mostly cloudy Mostly cloudy
53
68
A
Wed0%
Partly cloudy Partly cloudy
55
73
B
Thu0%
Partly cloudy Partly cloudy
64
80
B
Fri40%
Chance of showers Chance of showers
55
81
C
Sat10%
Mostly sunny; cooler Mostly sunny; cooler
44
70
B
Sun40%
Chance of showers Chance of showers
45
66
C
Mon10%
Mostly sunny Mostly sunny
39
65
C
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
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