Harwinton, CT Weather Forecast
Local 7-day forecast
Patchy Fog then Slight Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Harwinton, CT in one place.
Patchy fog before 8am, then a slight chance of rain showers. Partly sunny, with a high near 81. South wind 1 to 7 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
Local Weather Overview
This forecast page for Harwinton, CT 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: Sep 17, 2026 1:56 AM EDT.
The active forecast window currently covers Sep 17 to Sep 23, 2026 for Harwinton, CT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 23, 2026
- Latest sync
- Sep 17, 2026 1:56 AM EDT
- Forecast office
- ALY
- Source
- NOAA / NWS
Daily Outlook
This Week in Harwinton
Thursday looks like the warmest upcoming period in Harwinton at 81 degrees F.
Friday Night is the coolest period ahead with temperatures near 49 degrees F.
The strongest winds are forecast for Friday at about 7 to 12 mph N.
Precipitation is mentioned in 10 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 17, 2026 1:56 AM EDT
- Coverage
- 7 days
- Time zone
- America/New_York
- Forecast office
- ALY
- Radar station
- KOKX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
A chance of rain showers before 2am. Mostly cloudy, with a low around 63. Northwest wind 2 to 6 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
Sunny, with a high near 76. North wind 7 to 12 mph.
Partly cloudy, with a low around 49. North wind 3 to 8 mph.
Mostly sunny, with a high near 69.
A chance of rain showers after 2am. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Rain showers. Mostly cloudy, with a high near 66. Chance of precipitation is 80%.
Rain showers likely. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.
A chance of rain showers. Partly sunny, with a high near 68. Chance of precipitation is 30%.
A chance of rain showers. Mostly cloudy, with a low around 51. Chance of precipitation is 40%.
A chance of rain showers. Mostly cloudy, with a high near 64. Chance of precipitation is 40%.
A slight chance of rain showers. Mostly cloudy, with a low around 50.
A slight chance of rain showers. Partly sunny, with a high near 66.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Patchy Fog then Slight Chance Rain Showers
|
81°F |
1 to 7 mph
S
|
|
Thursday Night
Sep 17
|
Chance Rain Showers
|
63°F |
2 to 6 mph
NW
|
|
Friday
Sep 18
|
Sunny
|
76°F |
7 to 12 mph
N
|
|
Friday Night
Sep 18
|
Partly Cloudy
|
49°F |
3 to 8 mph
N
|
|
Saturday
Sep 19
|
Mostly Sunny
|
69°F |
3 mph
E
|
|
Saturday Night
Sep 19
|
Mostly Cloudy then Chance Rain Showers
|
53°F |
2 to 6 mph
SE
|
|
Sunday
Sep 20
|
Rain Showers
|
66°F |
7 mph
SE
|
|
Sunday Night
Sep 20
|
Rain Showers Likely
|
53°F |
7 mph
NE
|
|
Monday
Sep 21
|
Chance Rain Showers
|
68°F |
7 mph
NE
|
|
Monday Night
Sep 21
|
Chance Rain Showers
|
51°F |
3 to 7 mph
NE
|
|
Tuesday
Sep 22
|
Chance Rain Showers
|
64°F |
7 mph
NE
|
|
Tuesday Night
Sep 22
|
Slight Chance Rain Showers
|
50°F |
7 mph
NE
|
|
Wednesday
Sep 23
|
Slight Chance Rain Showers
|
66°F |
8 mph
E
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Harwinton.
