Live Weather & Forecast
Weather in Groton
Massachusetts, United States · Real-time conditions & 3-day outlook
11°C
Feels like 11°C
51°F / Feels 52°F
Sunny
Groton, Massachusetts
🌞 Daytime
Updated: 2026-04-12 12:45
Humidity
27%
Wind
3.6 km/h WSW
Wind Gust
10.8 km/h
Pressure
1033 mb
Visibility
16 km
UV Index
5.5
(Moderate)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
-4.5°C
Wind Degree
239°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
173.9 μg/m³
NO₂
4.7 μg/m³
O₃
109 μg/m³
SO₂
2.3 μg/m³
PM 2.5
6.5 μg/m³
PM 10
7.6 μg/m³
Today's Hourly Forecast
24-hour breakdown for Groton, Massachusetts
12 AM
6°
Clear
1 AM
4°
Clear
2 AM
3°
Clear
3 AM
3°
Clear
4 AM
2°
Clear
5 AM
1°
Clear
6 AM
1°
Clear
7 AM
3°
Sunny
8 AM
5°
Sunny
9 AM
7°
Sunny
10 AM
10°
Sunny
11 AM
12°
Sunny
12 PM
11°
Sunny
1 PM
15°
Sunny
2 PM
15°
Sunny
3 PM
16°
Sunny
4 PM
16°
Sunny
5 PM
15°
Sunny
6 PM
13°
Overcast
7 PM
11°
Overcast
8 PM
11°
Overcast
9 PM
10°
Overcast
10 PM
8°
Overcast
11 PM
8°
Overcast
3-Day Forecast
Daily overview for Groton, Massachusetts
Today
Sunny
16°
/
1°
🌧️ 0% chance of rain
💧 Avg. humidity: 40%
💨 Max wind: 14.8 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:10 AM
🌇 Sunset: 07:25 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Moderate rain
17°
/
4°
🌧️ 84% chance of rain
💧 Avg. humidity: 81%
💨 Max wind: 24.1 km/h
🌧️ Total precip: 10.94 mm
☀️ UV Index: 0.3
🌅 Sunrise: 06:08 AM
🌇 Sunset: 07:26 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Sunny
25°
/
16°
🌧️ 0% chance of rain
💧 Avg. humidity: 71%
💨 Max wind: 17.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.7
🌅 Sunrise: 06:07 AM
🌇 Sunset: 07:28 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Best Time to Visit Groton
Plan your trip to Groton, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Groton?
Current conditions in Groton: Sunny, temperature 11°C, humidity 27%.
What is the best time to visit Groton?
The best time to visit Groton is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Groton?
Groton is located at approximately 42.6° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Groton?
The wettest period in Groton is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Groton?
For visits to Groton during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Groton in?
Groton is located in United States, in the state of Massachusetts.
What are the public holidays in Groton in 2026?
View the 2026 public holidays for Groton on our Holidays page.
What are the GPS coordinates used for the weather forecast in Groton?
The weather forecast for Groton uses coordinates 42.6112, -71.5745.