Merrimac, MA Weather Forecast
Local 7-day forecast
Widespread Frost then Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Merrimac, MA in one place.
Widespread frost before 9am. Sunny, with a high near 54. North wind around 3 mph.
Local Weather Overview
This forecast page for Merrimac, MA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Oct 17, 2026 4:22 PM EDT.
The active forecast window currently covers Oct 18 to Oct 23, 2026 for Merrimac, MA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 18 to Oct 23, 2026
- Latest sync
- Oct 17, 2026 4:22 PM EDT
- Forecast office
- BOX
- Source
- NOAA / NWS
Daily Outlook
This Week in Merrimac
Tuesday looks like the warmest upcoming period in Merrimac at 60 degrees F.
Sunday Night is the coolest period ahead with temperatures near 37 degrees F.
The strongest winds are forecast for Wednesday at about 14 mph NE.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Oct 17, 2026 4:22 PM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- BOX
- Radar station
- KBOX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Clear, with a low around 37. South wind around 3 mph.
Sunny, with a high near 58. North wind 2 to 7 mph.
Mostly cloudy, with a low around 42. Northeast wind 3 to 7 mph.
Partly sunny, with a high near 60. North wind 8 to 13 mph, with gusts as high as 23 mph.
Partly cloudy, with a low around 44. Northeast wind 7 to 13 mph.
Partly sunny, with a high near 54. Northeast wind around 14 mph, with gusts as high as 28 mph.
Mostly cloudy, with a low around 43. Northeast wind 8 to 12 mph.
A slight chance of rain showers between 8am and 4pm. Partly sunny, with a high near 57. North wind 7 to 10 mph.
Partly cloudy, with a low around 44. North wind 5 to 10 mph.
Mostly sunny, with a high near 57. North wind around 13 mph, with gusts as high as 24 mph.
A slight chance of rain showers after 1am. Partly cloudy, with a low around 43. North wind around 10 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Sunday
Oct 18
|
Widespread Frost then Sunny
|
54°F |
3 mph
N
|
|
Sunday Night
Oct 18
|
Clear
|
37°F |
3 mph
S
|
|
Monday
Oct 19
|
Sunny
|
58°F |
2 to 7 mph
N
|
|
Monday Night
Oct 19
|
Mostly Cloudy
|
42°F |
3 to 7 mph
NE
|
|
Tuesday
Oct 20
|
Partly Sunny
|
60°F |
8 to 13 mph
N
|
|
Tuesday Night
Oct 20
|
Partly Cloudy
|
44°F |
7 to 13 mph
NE
|
|
Wednesday
Oct 21
|
Partly Sunny
|
54°F |
14 mph
NE
|
|
Wednesday Night
Oct 21
|
Mostly Cloudy
|
43°F |
8 to 12 mph
NE
|
|
Thursday
Oct 22
|
Slight Chance Rain Showers
|
57°F |
7 to 10 mph
N
|
|
Thursday Night
Oct 22
|
Partly Cloudy
|
44°F |
5 to 10 mph
N
|
|
Friday
Oct 23
|
Mostly Sunny
|
57°F |
13 mph
N
|
|
Friday Night
Oct 23
|
Partly Cloudy then Slight Chance Rain Showers
|
43°F |
10 mph
N
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Merrimac.
