Groton, MA Hourly Weather
Hour-by-Hour Forecast
Today's Weather Breakdown
Currently 57°F and clear. Today in Groton, MA: high of 79°F, low of 52°F with partially cloudy. 44% chance of rain.
| Currently | 57°F · Clear |
| Today's High | 79°F |
| Today's Low | 52°F |
| Rain Chance | 44% |
Hour-by-Hour Temperature & Rain Probability
In Groton, MA today, temperatures start near 52°F in the early morning and climb toward a high of 79°F in the afternoon. Rain probability climbs through the day, reaching around 44%. The afternoon hours carry the highest precipitation risk — bring an umbrella if you plan to be outside.
Reading the Hourly Weather Forecast
The hour-by-hour table shows temperature, feels-like temperature, precipitation probability, wind speed, humidity, and UV index for each hour of the day in Groton. Rain probability above 40% for a given hour indicates a meaningful chance of precipitation during that window. UV index above 6 means sun protection is recommended for extended time outdoors.
Hourly forecasts are updated from live weather station data. For the full multi-day picture, see the Groton 10-day forecast or check tomorrow's rain forecast for precipitation timing.
Hour-by-Hour Forecast for Groton, MA
| Time | Temp | Feels Like | Rain | Conditions |
|---|---|---|---|---|
| 12:00 AM | 66°F | 66°F | 0% | Clear |
| 1:00 AM | 65°F | 65°F | 0% | Clear |
| 2:00 AM | 65°F | 65°F | 0% | Clear |
| 3:00 AM | 62°F | 62°F | 0% | Clear |
| 4:00 AM | 56°F | 56°F | 0% | Clear |
| 5:00 AM | 54°F | 54°F | 0% | Clear |
| 6:00 AM | 52°F | 52°F | 0% | Clear |
| 7:00 AM | 54°F | 54°F | 0% | Clear |
| 8:00 AM | 60°F | 60°F | 0% | Partially cloudy |
| 9:00 AM | 63°F | 63°F | 0% | Partially cloudy |
| 10:00 AM | 69°F | 69°F | 1% | Partially cloudy |
| 11:00 AM | 73°F | 73°F | 2% | Partially cloudy |
| 12:00 PM | 74°F | 74°F | 3% | Partially cloudy |
| 1:00 PM | 77°F | 77°F | 4% | Partially cloudy |
| 2:00 PM | 79°F | 79°F | 10% | Partially cloudy |
| 3:00 PM | 79°F | 79°F | 18% | Partially cloudy |
| 4:00 PM | 78°F | 78°F | 30% | Partially cloudy |
| 5:00 PM | 78°F | 78°F | 44% | Partially cloudy |
| 6:00 PM | 74°F | 74°F | 39% | Partially cloudy |
| 7:00 PM | 72°F | 72°F | 38% | Partially cloudy |
| 8:00 PM | 70°F | 70°F | 30% | Partially cloudy |
| 9:00 PM | 66°F | 66°F | 26% | Partially cloudy |
| 10:00 PM | 66°F | 66°F | 11% | Partially cloudy |
| 11:00 PM | 65°F | 65°F | 3% | Partially cloudy |
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