UTC Offset
UTC-04:00
Groton, United States Snapshot 2026
Where is Groton?
Groton, United States
- Continent
- Americas
- Country
- United States
- City
- Groton
- Population
- 9.2K
- Elevation
- 24 m
- Coordinates
- 41.35°, -72.08°
Groton is a city in United States with a population of approximately 9.2K. Average temperatures range from -2°C (28°F) in January to 28°C (82°F) in July. The best time to visit is June, July, August, September, October.
Time in Groton right now
Open full time & time zone page 13:49 49
Monday, June 15, 2026
IANA time zone
America/New_York
Daylight saving
DST in effect
EST / EDT
Next DST change
November 1
backward -1h
Live weather in Groton
Daylight in Groton today
View full sunrise & sunset page Sunrise
Sunset
Day length
15h 09m
Climate normals for Groton
Long-term monthly averages based on historical data.
January
Poor 
February
Poor March
Poor April
Fair May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October best
Good November
Poor December
Poor | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 4°C / -2°C | 0°C / -7°C | 10days (98 mm) Wet | 6h Fair | 68% Muggy | 2.3 Moderate | Poor | View Details |
| February | 5°C / -2°C | 2°C / -6°C | 10days (89 mm) Wet | 6.8h Fair | 71% Muggy | 3.3 Moderate | Poor | View Details |
| March | 9°C / 1°C | 5°C / -3°C | 10days (101 mm) Wet | 8.2h Good | 67% Muggy | 4.5 Moderate | Poor | View Details |
| April | 14°C / 6°C | 11°C / 2°C | 11days (108 mm) Wet | 8.7h Good | 70% Muggy | 5.3 High | Fair | View Details |
| May | 19°C / 11°C | 18°C / 9°C | 12days (102 mm) Wet | 9.7h Good | 76% Humid | 6.2 High | Good | View Details |
| June best | 24°C / 16°C | 25°C / 16°C | 10days (83 mm) Wet | 11.1h Excellent | 76% Humid | 7.2 Very High | Excellent | View Details |
| July best | 28°C / 20°C | 31°C / 22°C | 12days (124 mm) Wet | 11.4h Excellent | 78% Humid | 7.2 Very High | Excellent | View Details |
| August best | 27°C / 20°C | 29°C / 21°C | 12days (103 mm) Wet | 10.6h Excellent | 77% Humid | 6.6 High | Excellent | View Details |
| September best | 23°C / 17°C | 24°C / 17°C | 9days (99 mm) Wet | 8.6h Good | 77% Humid | 5.1 High | Excellent | View Details |
| October best | 18°C / 11°C | 17°C / 9°C | 9days (106 mm) Wet | 7.4h Good | 76% Humid | 4 Moderate | Good | View Details |
| November | 11°C / 5°C | 8°C / 1°C | 8days (81 mm) Wet | 6.7h Fair | 70% Muggy | 2.8 Moderate | Poor | View Details |
| December | 6°C / 0°C | 2°C / -4°C | 10days (129 mm) Wet | 5.6h Fair | 71% Muggy | 2 Low | Poor | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 4°C / -2°C . Feb: 5°C / -2°C . Mar: 9°C / 1°C . Apr: 14°C / 6°C . May: 19°C / 11°C . Jun: 24°C / 16°C . Jul: 28°C / 20°C . Aug: 27°C / 20°C . Sep: 23°C / 17°C . Oct: 18°C / 11°C . Nov: 11°C / 5°C . Dec: 6°C / 0°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 98 mm. Feb: 89 mm. Mar: 101 mm. Apr: 108 mm. May: 102 mm. Jun: 83 mm. Jul: 124 mm. Aug: 103 mm. Sep: 99 mm. Oct: 106 mm. Nov: 81 mm. Dec: 129 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 68%. Feb: 71%. Mar: 67%. Apr: 70%. May: 76%. Jun: 76%. Jul: 78%. Aug: 77%. Sep: 77%. Oct: 76%. Nov: 70%. Dec: 71%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 19 km/h . Feb: 19 km/h . Mar: 20 km/h . Apr: 19 km/h . May: 17 km/h . Jun: 16 km/h . Jul: 15 km/h . Aug: 15 km/h . Sep: 15 km/h . Oct: 17 km/h . Nov: 19 km/h . Dec: 19 km/h .
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 6°C . Feb: 4°C . Mar: 5°C . Apr: 8°C . May: 13°C . Jun: 17°C . Jul: 21°C . Aug: 21°C . Sep: 21°C . Oct: 18°C . Nov: 13°C . Dec: 8°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 2. Feb: UV 3. Mar: UV 5. Apr: UV 5. May: UV 6. Jun: UV 7. Jul: UV 7. Aug: UV 7. Sep: UV 5. Oct: UV 4. Nov: UV 3. Dec: UV 2.
Frequently Asked Questions
Groton has a population of approximately 9.2K.
The best months to visit Groton are June, July, August, September, October, when temperatures are pleasant and rainfall is lower.
Groton receives approximately 1223mm of rainfall annually across 123 rainy days.
Groton is located in United States, in the Americas region.
Groton sits at an elevation of 24 m (79 ft) above sea level.