Old Mystic Weather Forecast 15 Days, Weather in Old Mystic Today
Current weather conditions and 15 day weather forecast for Old Mystic, 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 Mystic
| 20 December 2025 Saturday -1.7 ° C / 28.9°F  Partly Cloudy |
Feels Like : -8.6 ° C / 16.5°F Humidity : % 58 Pressure : 1018 mb Wind Speed : 29.2 kmph / 18.1 miles from WNW  Visibility : 16 km Precipitation (rainfall) : 0 mm Cloud (%) : 0 |
15 day weather forecast for Old Mystic, CT, USA
Weather Forecast for next 15 Days for Old Mystic 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 Mystic, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|
| 20 December 2025 Saturday |  Sunny |
-0.5 ° C (31.1°F) |
3.9 ° C (39°F) |
1.4 ° C (34.6°F) |
% 66 | 0% | 0.3 | Sunrise:07:10 AM Sunset: 04:21 PM |
Moonrise:08:01 AM Moonset: 04:36 PM Moon Phase ( New Moon ) |
|
| 21 December 2025 Sunday |  Overcast |
0.2 ° C (32.3°F) |
7.9 ° C (46.2°F) |
5.1 ° C (41.2°F) |
% 73 | 0% | 0.3 | Sunrise:07:10 AM Sunset: 04:21 PM |
Moonrise:08:45 AM Moonset: 05:38 PM Moon Phase ( Waxing Crescent ) |
|
| 22 December 2025 Monday | Sunny |
-4.7 ° C (23.5°F) |
1.8 ° C (35.2°F) |
-1.4 ° C (29.6°F) |
% 49 | 0% | 0.3 | Sunrise:07:11 AM Sunset: 04:22 PM |
Moonrise:09:22 AM Moonset: 06:44 PM Moon Phase ( Waxing Crescent ) |
|
| 23 December 2025 Tuesday |  Moderate rain |
-2.5 ° C (27.5°F) |
3.6 ° C (38.5°F) |
1.4 ° C (34.5°F) |
% 78 | 85% | 0.1 | Sunrise:07:11 AM Sunset: 04:22 PM |
Moonrise:09:52 AM Moonset: 07:52 PM Moon Phase ( Waxing Crescent ) |
|
| 24 December 2025 Wednesday | Partly Cloudy |
-0.5 ° C (31°F) |
4.6 ° C (40.3°F) |
2.8 ° C (37°F) |
% 80 | 0% | 0 | Sunrise:07:12 AM Sunset: 04:23 PM |
Moonrise:10:18 AM Moonset: 08:59 PM Moon Phase ( Waxing Crescent ) |
|
| 25 December 2025 Thursday |  Patchy rain nearby |
-0.6 ° C (30.9°F) |
5.6 ° C (42°F) |
3.6 ° C (38.4°F) |
% 85 | 80% | 1 | Sunrise:07:12 AM Sunset: 04:23 PM |
Moonrise:10:41 AM Moonset: 10:06 PM Moon Phase ( Waxing Crescent ) |
|
| 26 December 2025 Friday | Patchy rain nearby |
5.2 ° C (41.4°F) |
11.1 ° C (52°F) |
8.3 ° C (46.9°F) |
% 90 | 79% | 2 | Sunrise:07:12 AM Sunset: 04:24 PM |
Moonrise:11:02 AM Moonset: 11:15 PM Moon Phase ( Waxing Crescent ) |
|
| 27 December 2025 Saturday | Sunny |
2.3 ° C (36.2°F) |
6.7 ° C (44°F) |
4.6 ° C (40.3°F) |
% 81 | 0% | 2 | Sunrise:07:13 AM Sunset: 04:25 PM |
Moonrise:11:24 AM Moonset: No moonset Moon Phase ( First Quarter ) |
|
| 28 December 2025 Sunday | Partly Cloudy |
-0.4 ° C (31.2°F) |
3.8 ° C (38.9°F) |
1.5 ° C (34.7°F) |
% 70 | 0% | 2 | Sunrise:07:13 AM Sunset: 04:26 PM |
Moonrise:11:47 AM Moonset: 12:25 AM Moon Phase ( Waxing Gibbous ) |
|
| 29 December 2025 Monday |  Patchy moderate snow |
-0.9 ° C (30.3°F) |
2.6 ° C (36.6°F) |
0.7 ° C (33.2°F) |
% 60 | 75% | 1 | Sunrise:07:13 AM Sunset: 04:26 PM |
Moonrise:12:13 PM Moonset: 01:39 AM Moon Phase ( Waxing Gibbous ) |
|
| 30 December 2025 Tuesday |  Blizzard |
-1.4 ° C (29.4°F) |
1 ° C (33.7°F) |
-0.1 ° C (31.9°F) |
% 78 | 81% | 1 | Sunrise:07:14 AM Sunset: 04:27 PM |
Moonrise:12:45 PM Moonset: 02:56 AM Moon Phase ( Waxing Gibbous ) |
|
| 31 December 2025 Wednesday | Sunny |
-2.8 ° C (26.9°F) |
3.1 ° C (37.6°F) |
-0.7 ° C (30.8°F) |
% 63 | 0% | 2 | Sunrise:07:14 AM Sunset: 04:28 PM |
Moonrise:01:27 PM Moonset: 04:17 AM Moon Phase ( Waxing Gibbous ) |
|
| 01 January 2026 Thursday | Partly Cloudy |
-1.9 ° C (28.7°F) |
5.4 ° C (41.8°F) |
1.1 ° C (33.9°F) |
% 64 | 0% | 2 | Sunrise:07:14 AM Sunset: 04:29 PM |
Moonrise:02:20 PM Moonset: 05:36 AM Moon Phase ( Waxing Gibbous ) |
|
| 02 January 2026 Friday | Partly Cloudy |
-0.1 ° C (31.8°F) |
4.9 ° C (40.9°F) |
1.5 ° C (34.8°F) |
% 76 | 0% | 2 | Sunrise:07:14 AM Sunset: 04:30 PM |
Moonrise:03:28 PM Moonset: 06:47 AM Moon Phase ( Waxing Gibbous ) |
|
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