5-day weather forecast for Old Mystic, Connecticut
Today
57°
66°
Chance Thunderstorms
Friday
58°
69°
Chance Thunderstorms
Saturday
63°
76°
Partly sunny
Sunday
61°
75°
Slight Chance Thunderstorms
Monday
63°
76°
Chance Thunderstorms
Click on a forecast to see the forecast trend for that day
Weather changeability for Groton, Connecticut
| Temperature | Last Month | Last Year |
|---|---|---|
| Average change in high temperature day-to-day | 4.6° | 5.0° |
| Average change in low temperature day-to-day | 5.6° | 6.7° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 67% | 61% |
| Chance of precip day after a dry day | 4% | 20% |
Weather forecast accuracy for Groton, Connecticut
| The Weather Channel | 74.69% |
| Intellicast | 74.69% |
| AccuWeather | 66.67% |
| World Weather Online | 64.51% |
| National Weather Service | 63.58% |
| Weather Underground | 62.96% |
| CustomWeather | 62.04% |
| Persistence | 60.55% |
| NWS Digital Forecast | 57.47% |
| Intellicast | 71.89% |
| The Weather Channel | 71.87% |
| AccuWeather | 70.06% |
| National Weather Service | 67.77% |
| CustomWeather | 65.92% |
| NWS Digital Forecast | 63.23% |
| Persistence | 47.52% |
ForecastAdvisor Fact
75.3% of The Weather Channel's high temperature forecasts for Groton were within 3 degrees of actual temperatures last month.