Old Greenwich Weather Forecast 15 Days, Weather in Old Greenwich Today
Current weather conditions and 15 day weather forecast for Old Greenwich, 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 Old Greenwich
| 05 December 2025 Friday -9.9 ° C / 14.2°F  Partly cloudy |
Feels Like : -14.8 ° C / 5.4°F Humidity : % 51 Pressure : 1027 mb Wind Speed : 9 kmph / 5.6 miles from NNE  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 50 |
15 day weather forecast for Old Greenwich, CT, USA
Weather Forecast for next 15 Days for Old Greenwich 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 Old Greenwich, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 05 December 2025 Friday | Partly Cloudy |
-9.2 ° C (15.4°F) |
-0.4 ° C (31.3°F) |
-4.2 ° C (24.4°F) |
% 52 | 0% | 0.3 | Sunrise:07:04 AM Sunset: 04:25 PM |
Moonrise:04:52 PM Moonset: 08:09 AM Moon Phase ( Full Moon ) |
|
| 06 December 2025 Saturday |  Overcast |
-2.2 ° C (28°F) |
0.9 ° C (33.6°F) |
-0.6 ° C (30.9°F) |
% 91 | 0% | 0.3 | Sunrise:07:05 AM Sunset: 04:25 PM |
Moonrise:06:04 PM Moonset: 09:15 AM Moon Phase ( Waning Gibbous ) |
|
| 07 December 2025 Sunday | Overcast |
-1 ° C (30.2°F) |
2 ° C (35.6°F) |
0.6 ° C (33°F) |
% 78 | 0% | 0.3 | Sunrise:07:06 AM Sunset: 04:25 PM |
Moonrise:07:22 PM Moonset: 10:06 AM Moon Phase ( Waning Gibbous ) |
|
| 08 December 2025 Monday |  Sunny |
-5.5 ° C (22°F) |
0 ° C (32.1°F) |
-2.1 ° C (28.3°F) |
% 57 | 0% | 0.3 | Sunrise:07:07 AM Sunset: 04:25 PM |
Moonrise:08:38 PM Moonset: 10:45 AM Moon Phase ( Waning Gibbous ) |
|
| 09 December 2025 Tuesday | Partly Cloudy |
-6 ° C (21.1°F) |
1.7 ° C (35°F) |
-3 ° C (26.7°F) |
% 52 | 0% | 0 | Sunrise:07:08 AM Sunset: 04:25 PM |
Moonrise:09:51 PM Moonset: 11:15 AM Moon Phase ( Waning Gibbous ) |
|
| 10 December 2025 Wednesday | Partly Cloudy |
1.5 ° C (34.7°F) |
5.8 ° C (42.5°F) |
4.1 ° C (39.3°F) |
% 73 | 0% | 2 | Sunrise:07:09 AM Sunset: 04:25 PM |
Moonrise:10:59 PM Moonset: 11:40 AM Moon Phase ( Waning Gibbous ) |
|
| 11 December 2025 Thursday |  Patchy rain nearby |
3.9 ° C (38.9°F) |
7.2 ° C (45°F) |
5.9 ° C (42.5°F) |
% 83 | 87% | 2 | Sunrise:07:09 AM Sunset: 04:25 PM |
Moonrise:No moonrise Moonset: 12:01 PM Moon Phase ( Last Quarter ) |
|
| 12 December 2025 Friday | Partly Cloudy |
0.7 ° C (33.3°F) |
3.9 ° C (38.9°F) |
2.3 ° C (36.1°F) |
% 64 | 0% | 2 | Sunrise:07:10 AM Sunset: 04:26 PM |
Moonrise:12:03 AM Moonset: 12:21 PM Moon Phase ( Waning Crescent ) |
|
| 13 December 2025 Saturday | Partly Cloudy |
-0.7 ° C (30.7°F) |
1.9 ° C (35.5°F) |
0.4 ° C (32.7°F) |
% 54 | 0% | 2 | Sunrise:07:11 AM Sunset: 04:26 PM |
Moonrise:01:06 AM Moonset: 12:40 PM Moon Phase ( Waning Crescent ) |
|
| 14 December 2025 Sunday | Sunny |
-0.7 ° C (30.8°F) |
3.3 ° C (38°F) |
0.7 ° C (33.3°F) |
% 59 | 0% | 2 | Sunrise:07:12 AM Sunset: 04:26 PM |
Moonrise:02:07 AM Moonset: 01:01 PM Moon Phase ( Waning Crescent ) |
|
| 15 December 2025 Monday | Partly Cloudy |
-1.2 ° C (29.9°F) |
3.4 ° C (38.1°F) |
0.8 ° C (33.5°F) |
% 51 | 0% | 2 | Sunrise:07:12 AM Sunset: 04:26 PM |
Moonrise:03:09 AM Moonset: 01:24 PM Moon Phase ( Waning Crescent ) |
|
| 16 December 2025 Tuesday | Patchy rain nearby |
3 ° C (37.4°F) |
5.7 ° C (42.2°F) |
4.8 ° C (40.6°F) |
% 74 | 88% | 1 | Sunrise:07:13 AM Sunset: 04:27 PM |
Moonrise:04:12 AM Moonset: 01:50 PM Moon Phase ( Waning Crescent ) |
|
| 17 December 2025 Wednesday | Patchy rain nearby |
5.5 ° C (41.8°F) |
7.6 ° C (45.6°F) |
6.2 ° C (43.2°F) |
% 96 | 77% | 2 | Sunrise:07:14 AM Sunset: 04:27 PM |
Moonrise:05:15 AM Moonset: 02:22 PM Moon Phase ( Waning Crescent ) |
|
| 18 December 2025 Thursday |  Moderate rain |
5.5 ° C (41.9°F) |
7.4 ° C (45.3°F) |
7.3 ° C (45.2°F) |
% 99 | 79% | 2 | Sunrise:07:14 AM Sunset: 04:27 PM |
Moonrise:06:17 AM Moonset: 03:01 PM Moon Phase ( Waning Crescent ) |
|
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