Cos Cob Weather Forecast 15 Days, Weather in Cos Cob Today
Current weather conditions and 15 day weather forecast for Cos Cob, Connecticut, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Cos Cob
| 15 December 2025 Monday -7.8 ° C / 18°F  Clear |
Feels Like : -16.3 ° C / 2.7°F Humidity : % 53 Pressure : 1018 mb Wind Speed : 27.4 kmph / 17 miles from NW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for Cos Cob, CT, USA
Weather Forecast for next 15 Days for Cos Cob including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Cos Cob, Connecticut state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 15 December 2025 Monday |  Partly Cloudy |
-10.1 ° C (13.8°F) |
-2 ° C (28.4°F) |
-5.4 ° C (22.3°F) |
% 62 | 0% | 0.3 | Sunrise:07:13 AM Sunset: 04:27 PM |
Moonrise:03:09 AM Moonset: 01:24 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday | Partly Cloudy |
-3.9 ° C (25°F) |
0.3 ° C (32.5°F) |
-1.9 ° C (28.6°F) |
% 67 | 0% | 0.3 | Sunrise:07:13 AM Sunset: 04:27 PM |
Moonrise:04:12 AM Moonset: 01:51 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday |  Cloudy |
-0.6 ° C (30.9°F) |
5.7 ° C (42.3°F) |
1.9 ° C (35.4°F) |
% 71 | 0% | 0.3 | Sunrise:07:14 AM Sunset: 04:27 PM |
Moonrise:05:15 AM Moonset: 02:22 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday |  Patchy rain nearby |
0.3 ° C (32.6°F) |
4.7 ° C (40.4°F) |
3.1 ° C (37.7°F) |
% 85 | 81% | 0.2 | Sunrise:07:15 AM Sunset: 04:28 PM |
Moonrise:06:17 AM Moonset: 03:02 PM Moon Phase ( Waning Crescent ) |
|
| 19 December 2025 Friday |  Heavy rain |
-1.5 ° C (29.3°F) |
11.4 ° C (52.5°F) |
8.3 ° C (46.9°F) |
% 84 | 88% | 0 | Sunrise:07:15 AM Sunset: 04:28 PM |
Moonrise:07:15 AM Moonset: 03:49 PM Moon Phase ( New Moon ) |
|
| 20 December 2025 Saturday | Sunny |
-3 ° C (26.6°F) |
0.4 ° C (32.8°F) |
-0.6 ° C (30.9°F) |
% 48 | 0% | 2 | Sunrise:07:16 AM Sunset: 04:28 PM |
Moonrise:08:07 AM Moonset: 04:44 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday | Patchy rain nearby |
4 ° C (39.2°F) |
7.8 ° C (46°F) |
5.8 ° C (42.5°F) |
% 88 | 89% | 2 | Sunrise:07:16 AM Sunset: 04:29 PM |
Moonrise:08:51 AM Moonset: 05:47 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday | Partly Cloudy |
-1.1 ° C (30°F) |
1.8 ° C (35.3°F) |
0.4 ° C (32.8°F) |
% 57 | 0% | 2 | Sunrise:07:17 AM Sunset: 04:30 PM |
Moonrise:09:28 AM Moonset: 06:52 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday |  Overcast |
-1.9 ° C (28.6°F) |
0.6 ° C (33.1°F) |
-0.3 ° C (31.5°F) |
% 61 | 0% | 1 | Sunrise:07:17 AM Sunset: 04:30 PM |
Moonrise:09:58 AM Moonset: 07:59 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Partly Cloudy |
2.4 ° C (36.4°F) |
7.4 ° C (45.4°F) |
4.5 ° C (40.2°F) |
% 65 | 0% | 2 | Sunrise:07:18 AM Sunset: 04:31 PM |
Moonrise:10:24 AM Moonset: 09:07 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday | Sunny |
-4.5 ° C (24°F) |
0.5 ° C (33°F) |
-1.2 ° C (29.9°F) |
% 52 | 0% | 2 | Sunrise:07:18 AM Sunset: 04:31 PM |
Moonrise:10:47 AM Moonset: 10:14 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Partly Cloudy |
-5.2 ° C (22.6°F) |
-0.8 ° C (30.6°F) |
-2.7 ° C (27.2°F) |
% 48 | 0% | 2 | Sunrise:07:18 AM Sunset: 04:32 PM |
Moonrise:11:09 AM Moonset: 11:22 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Patchy rain nearby |
0.7 ° C (33.2°F) |
2.2 ° C (35.9°F) |
1.9 ° C (35.5°F) |
% 78 | 89% | 1 | Sunrise:07:19 AM Sunset: 04:33 PM |
Moonrise:11:31 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday |  Moderate rain |
2 ° C (35.7°F) |
6.4 ° C (43.6°F) |
5.1 ° C (41.3°F) |
% 97 | 80% | 2 | Sunrise:07:19 AM Sunset: 04:33 PM |
Moonrise:11:54 AM Moonset: 12:32 AM Moon Phase ( Waxing Gibbous ) |
|
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