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Greenwich, CT Weather Forecast
Greenwich, CT Weather Forecast Dated: 446 PM Sun Sep 20 2026
Expect a cool pattern with more clouds than sun and frequent chances of rain over the coming period. generally humid conditions and no major pressure swings will dominate.
Sunday, September 20, 2026
Mid-Morning
63°F 17°C
Light Rain
Mid-Afternoon
67°F 19°C
Light Rain
Early-Evening
69°F 21°C
Light Rain
Refreshing around 67°F 19°C, rounds of showers expected off and on all day, with steady humidity and barometric pressure falling. Winds turning from the SSE to the SW at 10 mph 16 km/h.
Monday, September 21, 2026
Mid-Morning
62°F 16°C
Cloudy
Mid-Afternoon
68°F 20°C
Overcast
Early-Evening
67°F 20°C
Overcast
Comfortable with temperatures reaching 68°F 20°C, overcast throughout the day, with lower humidity and steady pressure. Winds switching from the NNE to the ENE at 11 mph 17 km/h.
Tuesday, September 22, 2026
Mid-Morning
56°F 13°C
Light Showers
Mid-Afternoon
55°F 13°C
Scattered Showers
Early-Evening
58°F 14°C
Scattered Showers
Chilly near 55°F 13°C, locally heavy downpours at times, with lower humidity and steady pressure. Winds NE at 21 mph 33 km/h. Gusts up to 25 mph 40 km/h.
Wednesday, September 23, 2026
Mid-Morning
55°F 13°C
Overcast
Mid-Afternoon
63°F 17°C
Scattered Showers
Early-Evening
59°F 15°C
Scattered Showers
Cool with a high near 63°F 17°C, periods of heavy rain and gusty conditions, with steady humidity and steady pressure. Winds out of the ENE at 20 mph 32 km/h. Gusts up to 26 mph 41 km/h.
Thursday, September 24, 2026
Mid-Morning
55°F 13°C
Overcast
Mid-Afternoon
62°F 17°C
Scattered Showers
Early-Evening
61°F 16°C
Overcast
Refreshing around 62°F 17°C, scattered downpours possible, with lower humidity and barometric pressure falling. Winds blowing from the NE at 19 mph 31 km/h. Gusts up to 27 mph 44 km/h.
Friday, September 25, 2026
Mid-Morning
52°F 11°C
Light Showers
Mid-Afternoon
54°F 12°C
Heavy Rain Showers
Early-Evening
55°F 13°C
Scattered Showers
Cool and brisk at 54°F 12°C, locally heavy downpours at times, with steady humidity and barometric pressure falling. Winds N at 26 mph 42 km/h. Gusts up to 44 mph 70 km/h.
Saturday, September 26, 2026
Mid-Morning
58°F 15°C
Light Showers
Mid-Afternoon
60°F 15°C
Light Showers
Early-Evening
60°F 16°C
Light Showers
Comfortable at 60°F 15°C, rounds of showers expected off and on all day, with steady humidity and barometric pressure rising. Winds switching from the NNE to the NE at 27 mph 43 km/h. Gusts up to 40 mph 65 km/h.
Sunday, September 27, 2026
Mid-Morning
56°F 14°C
Scattered Showers
Mid-Afternoon
61°F 16°C
Overcast
Early-Evening
59°F 16°C
Scattered Showers
Cool with a high near 61°F 16°C, scattered downpours possible, with steady humidity and steady pressure. Winds blowing from the NE at 24 mph 38 km/h. Gusts up to 32 mph 52 km/h.
Monday, September 28, 2026
Mid-Morning
56°F 14°C
Scattered Showers
Mid-Afternoon
63°F 17°C
Overcast
Early-Evening
61°F 16°C
Overcast
Refreshing around 63°F 17°C, locally heavy downpours at times, with steady humidity and steady pressure. Winds NE at 19 mph 31 km/h. Gusts up to 24 mph 38 km/h.
Tuesday, September 29, 2026
Mid-Morning
56°F 13°C
Overcast
Mid-Afternoon
65°F 18°C
Sunny
Early-Evening
65°F 19°C
Cloudy
Mildly cool near 65°F 18°C, overcast in the morning, becoming cloudy through the afternoon and evening, with steady humidity and steady pressure. Winds out of the ENE at 12 mph 19 km/h.
Wednesday, September 30, 2026
Mid-Morning
57°F 14°C
Scattered Showers
Mid-Afternoon
59°F 15°C
Light Showers
Early-Evening
61°F 16°C
Light Showers
Comfortable at 59°F 15°C, scattered downpours possible, with steady humidity and steady pressure. Winds turning from the NNE to the NE at 11 mph 17 km/h.
Thursday, October 1, 2026
Mid-Morning
64°F 18°C
Light Fog
Mid-Afternoon
67°F 19°C
Sunny
Early-Evening
68°F 20°C
Sunny
Cool with a high near 67°F 19°C, overcast in the morning, cloudy in the afternoon, and sunny this evening, with lower humidity and steady pressure. Winds switching from the NE to the SSE at 7 mph 12 km/h.
Friday, October 2, 2026
Mid-Morning
64°F 18°C
Light Showers
Mid-Afternoon
65°F 18°C
Overcast
Early-Evening
65°F 18°C
Light Showers
Refreshing around 65°F 18°C, rounds of showers morning and night, dry in between, with steady humidity and steady pressure. Winds out of the SW at 4 mph 6 km/h.
Saturday, October 3, 2026
Mid-Morning
59°F 15°C
Sunny
Mid-Afternoon
67°F 20°C
Partly Cloudy
Early-Evening
65°F 18°C
Sunny
Mildly cool near 67°F 20°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and steady pressure. Winds swinging from the WSW to the W at 13 mph 20 km/h.
Greenwich, CT Weather Radar Map
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