Greenville, CT Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Greenville, CT in one place.
Mostly sunny. High near 74, with temperatures falling to around 72 in the afternoon. South wind 0 to 8 mph.
Local Weather Overview
This forecast page for Greenville, 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 15, 2026 11:54 AM EDT.
The active forecast window currently covers Sep 16 to Sep 21, 2026 for Greenville, CT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 16 to Sep 21, 2026
- Latest sync
- Sep 15, 2026 11:54 AM EDT
- Forecast office
- OKX
- Source
- NOAA / NWS
Daily Outlook
This Week in Greenville
Friday looks like the warmest upcoming period in Greenville at 79 degrees F.
Friday Night is the coolest period ahead with temperatures near 54 degrees F.
The strongest winds are forecast for Sunday at about 7 to 12 mph S.
Precipitation is mentioned in 7 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 15, 2026 11:54 AM EDT
- Coverage
- 6 days
- Time zone
- America/New_York
- Forecast office
- OKX
- Radar station
- KBOX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 61. South wind 0 to 5 mph.
Mostly sunny. High near 78, with temperatures falling to around 75 in the afternoon. South wind 0 to 8 mph.
A chance of rain showers after 8pm. Mostly cloudy. Low around 64, with temperatures rising to around 66 overnight. Chance of precipitation is 40%.
A chance of rain showers before 8am. Mostly sunny, with a high near 79. Chance of precipitation is 40%.
Partly cloudy, with a low around 54.
Mostly sunny, with a high near 71.
A chance of rain showers after 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 30%.
A chance of rain showers. Mostly cloudy, with a high near 76. Chance of precipitation is 50%.
A chance of rain showers. Mostly cloudy, with a low around 59. Chance of precipitation is 50%.
A chance of rain showers. Mostly cloudy, with a high near 72. Chance of precipitation is 50%.
A chance of rain showers. Mostly cloudy, with a low around 54.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Sep 16
|
Mostly Sunny
|
74°F |
0 to 8 mph
S
|
|
Wednesday Night
Sep 16
|
Partly Cloudy
|
61°F |
0 to 5 mph
S
|
|
Thursday
Sep 17
|
Mostly Sunny
|
78°F |
0 to 8 mph
S
|
|
Thursday Night
Sep 17
|
Chance Rain Showers
|
64°F |
5 to 8 mph
SW
|
|
Friday
Sep 18
|
Chance Rain Showers then Mostly Sunny
|
79°F |
6 to 9 mph
NW
|
|
Friday Night
Sep 18
|
Partly Cloudy
|
54°F |
2 to 6 mph
N
|
|
Saturday
Sep 19
|
Mostly Sunny
|
71°F |
7 mph
E
|
|
Saturday Night
Sep 19
|
Mostly Cloudy then Chance Rain Showers
|
57°F |
2 to 6 mph
SE
|
|
Sunday
Sep 20
|
Chance Rain Showers
|
76°F |
7 to 12 mph
S
|
|
Sunday Night
Sep 20
|
Chance Rain Showers
|
59°F |
5 to 9 mph
NW
|
|
Monday
Sep 21
|
Chance Rain Showers
|
72°F |
9 mph
NE
|
|
Monday Night
Sep 21
|
Chance Rain Showers
|
54°F |
5 to 8 mph
NE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Greenville.