Weather for Old Mystic, Connecticut
Current Weather
44.1°F
Conditions: Partly cloudy
Humidity: 62%
Feels Like: 38°F
Wind: NNW 11.9 mph
Wind Gusts: 18.6 mph
Humidity: 62%
Feels Like: 38°F
Wind: NNW 11.9 mph
Wind Gusts: 18.6 mph
Pressure: 29.92 in
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0
Precipitation: 0 in
Cloud Cover: 75%
Visibility: 9 mi
UV Index: 0
Five Day Weather Forecast
Fri
H: 65°F
L: 42°F
Sat
H: 61°F
L: 46°F
Sun
H: 64°F
L: 58°F
Mon
H: 65°F
L: 55°F
Tue
H: 63°F
L: 50°F
Air Quality
AQI:
1 - Good
PM2.5:
1.95 μg/m3
PM10:
1.95 μg/m3
Carbon Monoxide: 164.85 μg/m3
Nitrogen Dioxide: 3.55 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 57 μg/m3
Nitrogen Dioxide: 3.55 μg/m3
Sulphur Dioxide: 1.55 μg/m3
Ozone: 57 μg/m3
Astronomical
Sunrise: 7:02 AM
Sun Transit: 12:33 AM
Sunset: 6:03 PM
Daylight: 11 hrs 1 mins
Sun Transit: 12:33 AM
Sunset: 6:03 PM
Daylight: 11 hrs 1 mins
Moonrise: 3:05 AM
Moon Transit: 9:51 AM
Moonset: 4:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 11.3%
Moon Transit: 9:51 AM
Moonset: 4:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 11.3%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM9:21 AM - 11:51 AM
Minor Periods
3:56 PM - 5:26 PM2:35 AM - 4:05 AM
Action Rating: 2 out of 5
Frost Advisory issued October 17 at 1:44AM EDT until October 18 at 9:00AM EDT by NWS Upton NY
Effective: Fri October 17, 2025, 1:44 AM
Expires: Fri October 17, 2025, 2:45 PM
* WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...In Connecticut, Northern Fairfield, Northern Middlesex, Northern New Haven, and Northern New London Counties. In New Jersey, Western Passaic County. In New York, Northern Westchester, Orange, Putnam, and Rockland Counties. * WHEN...From 11 PM this evening to 9 AM EDT Saturday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Take steps now to protect tender plants from the cold.
Friday, October 17, 2025
Weather Forecast
Conditions: Sunny
Average Temperature: 52.8°F
Average Humidity: 57%
Average Temperature: 52.8°F
Average Humidity: 57%
Chance of Rain: 0%
Wind: 14.8 mph
UV Index: 0.7
Wind: 14.8 mph
UV Index: 0.7
Air Quality
AQI:
1 - Good
PM2.5:
2.17 μg/m3
PM10:
2.17 μg/m3
Carbon Monoxide: 163.85 μg/m3
Nitrogen Dioxide: 3.47 μg/m3
Sulphur Dioxide: 1.43 μg/m3
Ozone: 67.96 μg/m3
Nitrogen Dioxide: 3.47 μg/m3
Sulphur Dioxide: 1.43 μg/m3
Ozone: 67.96 μg/m3
Astronomical
Sunrise: 7:02 AM
Sun Transit: 12:33 AM
Sunset: 6:03 PM
Daylight: 11 hrs 1 mins
Sun Transit: 12:33 AM
Sunset: 6:03 PM
Daylight: 11 hrs 1 mins
Moonrise: 3:05 AM
Moon Transit: 9:51 AM
Moonset: 4:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 11.3%
Moon Transit: 9:51 AM
Moonset: 4:26 PM
Moon Phase: Waning Crescent
Moon Illumination: 11.3%
Best Times for Fishing or Hunting
Major Periods
12:00 AM - 12:00 AM9:21 AM - 11:51 AM
Minor Periods
3:56 PM - 5:26 PM2:35 AM - 4:05 AM
Action Rating: 2 out of 5
Saturday, October 18, 2025
Weather Forecast
Conditions: Sunny
Average Temperature: 54.1°F
Average Humidity: 62%
Average Temperature: 54.1°F
Average Humidity: 62%
Chance of Rain: 0%
Wind: 8.7 mph
UV Index: 0.8
Wind: 8.7 mph
UV Index: 0.8
Air Quality
AQI:
1 - Good
PM2.5:
2.95 μg/m3
PM10:
3.1 μg/m3
Carbon Monoxide: 178.73 μg/m3
Nitrogen Dioxide: 6.71 μg/m3
Sulphur Dioxide: 2.06 μg/m3
Ozone: 62.24 μg/m3
Nitrogen Dioxide: 6.71 μg/m3
Sulphur Dioxide: 2.06 μg/m3
Ozone: 62.24 μg/m3
Astronomical
Sunrise: 7:03 AM
Sun Transit: 12:32 AM
Sunset: 6:02 PM
Daylight: 10 hrs 59 mins
Sun Transit: 12:32 AM
Sunset: 6:02 PM
Daylight: 10 hrs 59 mins
Moonrise: 4:09 AM
Moon Transit: 10:32 AM
Moonset: 4:45 PM
Moon Phase: Waning Crescent
Moon Illumination: 5.2%
Moon Transit: 10:32 AM
Moonset: 4:45 PM
Moon Phase: Waning Crescent
Moon Illumination: 5.2%
Best Times for Fishing or Hunting
Major Periods
12:10 AM - 2:40 AM10:02 AM - 12:32 AM
Minor Periods
4:15 PM - 5:45 PM3:39 AM - 5:09 AM
Action Rating: 3 out of 5
Sunday, October 19, 2025
Weather Forecast
Conditions: Partly Cloudy
Average Temperature: 61.5°F
Average Humidity: 76%
Average Temperature: 61.5°F
Average Humidity: 76%
Chance of Rain: 0%
Wind: 16.3 mph
UV Index: 0.8
Wind: 16.3 mph
UV Index: 0.8
Air Quality
AQI:
1 - Good
PM2.5:
9.23 μg/m3
PM10:
12.63 μg/m3
Carbon Monoxide: 170.61 μg/m3
Nitrogen Dioxide: 3.85 μg/m3
Sulphur Dioxide: 2.31 μg/m3
Ozone: 89.84 μg/m3
Nitrogen Dioxide: 3.85 μg/m3
Sulphur Dioxide: 2.31 μg/m3
Ozone: 89.84 μg/m3
Astronomical
Sunrise: 7:04 AM
Sun Transit: 12:32 AM
Sunset: 6:00 PM
Daylight: 10 hrs 56 mins
Sun Transit: 12:32 AM
Sunset: 6:00 PM
Daylight: 10 hrs 56 mins
Moonrise: 5:11 AM
Moon Transit: 11:12 AM
Moonset: 5:03 PM
Moon Phase: Waning Crescent
Moon Illumination: 1.3%
Moon Transit: 11:12 AM
Moonset: 5:03 PM
Moon Phase: Waning Crescent
Moon Illumination: 1.3%
Best Times for Fishing or Hunting
Major Periods
12:50 AM - 3:20 AM10:42 AM - 1:12 PM
Minor Periods
4:33 PM - 6:03 PM4:41 AM - 6:11 AM
Action Rating: 3 out of 5
Monday, October 20, 2025
Weather Forecast
Conditions: Moderate rain
Average Temperature: 61.8°F
Average Humidity: 85%
Average Temperature: 61.8°F
Average Humidity: 85%
Chance of Rain: 88%
Wind: 23.9 mph
UV Index: 0.5
Wind: 23.9 mph
UV Index: 0.5
Air Quality
AQI:
1 - Good
PM2.5:
4.82 μg/m3
PM10:
6.28 μg/m3
Carbon Monoxide: 137.05 μg/m3
Nitrogen Dioxide: 4.89 μg/m3
Sulphur Dioxide: 2.59 μg/m3
Ozone: 81.8 μg/m3
Nitrogen Dioxide: 4.89 μg/m3
Sulphur Dioxide: 2.59 μg/m3
Ozone: 81.8 μg/m3
Astronomical
Sunrise: 7:06 AM
Sun Transit: 12:32 AM
Sunset: 5:59 PM
Daylight: 10 hrs 53 mins
Sun Transit: 12:32 AM
Sunset: 5:59 PM
Daylight: 10 hrs 53 mins
Moonrise: 6:14 AM
Moon Transit: 11:53 AM
Moonset: 5:23 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%
Moon Transit: 11:53 AM
Moonset: 5:23 PM
Moon Phase: Waning Crescent
Moon Illumination: 0.0%
Best Times for Fishing or Hunting
Major Periods
1:31 AM - 4:01 AM11:23 AM - 1:53 PM
Minor Periods
4:53 PM - 6:23 PM5:44 AM - 7:14 AM
Action Rating: 4 out of 5
Tuesday, October 21, 2025
Weather Forecast
Conditions: Sunny
Average Temperature: 56.9°F
Average Humidity: 69%
Average Temperature: 56.9°F
Average Humidity: 69%
Chance of Rain: 0%
Wind: 15.2 mph
UV Index: 0
Wind: 15.2 mph
UV Index: 0
Air Quality
AQI:
1 - Good
PM2.5:
3.55 μg/m3
PM10:
3.73 μg/m3
Carbon Monoxide: 161.23 μg/m3
Nitrogen Dioxide: 8.62 μg/m3
Sulphur Dioxide: 2.83 μg/m3
Ozone: 68.08 μg/m3
Nitrogen Dioxide: 8.62 μg/m3
Sulphur Dioxide: 2.83 μg/m3
Ozone: 68.08 μg/m3
Astronomical
Sunrise: 7:07 AM
Sun Transit: 12:32 AM
Sunset: 5:57 PM
Daylight: 10 hrs 51 mins
Sun Transit: 12:32 AM
Sunset: 5:57 PM
Daylight: 10 hrs 51 mins
Moonrise: 7:16 AM
Moon Transit: 12:34 AM
Moonset: 5:44 PM
Moon Phase: New
Moon Illumination: 1.2%
Moon Transit: 12:34 AM
Moonset: 5:44 PM
Moon Phase: New
Moon Illumination: 1.2%
Best Times for Fishing or Hunting
Major Periods
2:12 AM - 4:42 AM12:04 AM - 2:34 PM
Minor Periods
5:14 PM - 6:44 PM6:46 AM - 8:16 AM
Action Rating: 4 out of 5
The times presented here are based upon the solunar theory, which is the idea that the movements of
fish and other animals are affected by the location of the sun and moon. The major periods are
believed to be the times of the greatest animal activity and occur when the moon is directly
overhead or underfoot (lunar transits). The minor periods also see increased activity and
occur when the moon is rising or setting. The strongest activity occurs during full or new moons,
and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.