Groton, CT weather
Today, hourly and 7-day forecast, sunrise and sunset, and the normal climate month by month
Weather in Groton now
Loading the National Weather Service forecast…
Groton weather by the hour
Groton weather for the next 7 days
Source: National Weather Service (NOAA) · forecast for the coordinates of Groton.
This week in Groton
Sunrise, sunset and moon in Groton
What is the weather usually like in Groton?
Köppen climate classification, calculated from the 1991–2020 normals
- Julywarmest month · 80°F average high
- Januarycoldest month · 23°F average low
- 39.3 inprecipitation per year · 999 mm
Average high and low temperature (°F)
Average precipitation (inches)
Best time to visit Groton: June to September, with mild temperatures and fewer rainy days.
Source: NOAA NCEI U.S. Climate Normals 1991–2020, station GROTON NEW LONDON AP, CT US (USW00014707), adjusted for the elevation of Groton.
Groton weather month by month
Sunrise and sunset in Groton through the year
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:10 AM | 4:45 PM | 9 h 35 min |
| February | 6:41 AM | 5:23 PM | 10 h 42 min |
| March | 6:58 AM | 6:56 PM | 11 h 58 min |
| April | 6:06 AM | 7:29 PM | 13 h 23 min |
| May | 5:27 AM | 8:01 PM | 14 h 33 min |
| June | 5:12 AM | 8:24 PM | 15 h 12 min |
| July | 5:26 AM | 8:21 PM | 14 h 55 min |
| August | 5:56 AM | 7:49 PM | 13 h 52 min |
| September | 6:27 AM | 6:59 PM | 12 h 31 min |
| October | 6:58 AM | 6:09 PM | 11 h 10 min |
| November | 6:35 AM | 4:30 PM | 9 h 55 min |
| December | 7:05 AM | 4:21 PM | 9 h 15 min |
Times for the 15th of each month, local time (America/New York).
What is the weather like in Groton?
Groton has a hot-summer humid continental climate. The warmest month is July, with an average high of 80°F (26°C), and the coldest is January, with average lows of 23°F (-5°C).
It gets about 39.3 inches (999 mm) of precipitation a year. The wettest month is September and the driest is February.
The best time to visit Groton is June to September. At 79 ft of elevation, nights are mild most of the year. The live forecast on this page comes from the National Weather Service and the climate averages from NOAA’s 1991–2020 U.S. Climate Normals.
More about Groton
Weather in towns near Groton
Questions about the weather in Groton
What is the hottest month in Groton?
July, with an average high of 80°F (26°C).
What is the coldest month in Groton?
January, with an average low of 23°F (-5°C).
How much does it rain in Groton?
About 39.3 inches (999 mm) a year; the wettest month is September.
Does it snow in Groton?
Snow is very rare or not recorded at the nearest weather station.
When is the best time to visit Groton?
June to September, when temperatures are most pleasant and rainy days are fewer.
What climate does Groton have?
Hot-summer humid continental (Köppen Dfa).
What is the weather like in Groton in November?
Highs average 53°F and lows 37°F, with about 3.2 inches of precipitation.
What time is sunrise in Groton?
Around 6:35 AM in mid-November, and sunset around 4:30 PM. Today’s exact times are shown above.
Where does this Groton weather forecast come from?
From the National Weather Service (NOAA), the official U.S. weather agency, for the exact coordinates of Groton.
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