Groton Weather Forecast 15 Days, Weather in Groton Today
Current weather conditions and 15 day weather forecast for Groton, Connecticut, USA including weather daily high/low temperature, warnings, chance of precipitation, pressure, humidity/wind chill, rain risk, wind speed, cloud, pressure, and UV index.
Current weather conditions at Groton
| 24 September 2026 Thursday 13.5 ° C / 56.3°F  Clear |
Feels Like : 7.6 ° C / 45.7°F Humidity : % 75 Pressure : 1032 mb Wind Speed : 31.3 kmph / 19.5 miles from NE  Visibility : 10 km Precipitation (rainfall) : 0 mm Cloud (%) : 22 |
15 day weather forecast for Groton, CT, USA
Weather Forecast for next 15 Days for Groton including weather warnings, temperature, rain, wind speed, cloud, snow, wind speed and wind direction, pressure and UV index.Here is weather for the next 15 days in Groton, Connecticut state, US. To see the daily forecast, scroll to the table below.
| Date | Weather forecast | Low temperature | High temperature | Avg. temperature | Humidity | Chance of rain | UV Index | Sun Position | Moon Position | |
|---|---|---|---|---|---|---|---|---|---|---|
| 23 September 2026 Wednesday |  Overcast |
12.5 ° C (54.5°F) |
18.3 ° C (65°F) |
15.3 ° C (59.5°F) |
% 67 | 12% | 5.3 | Sunrise:06:36 AM Sunset: 06:44 PM |
Moonrise:05:28 PM Moonset: 03:31 AM Moon Phase ( Waxing Gibbous ) |
|
| 24 September 2026 Thursday | Sunny |
11.6 ° C (52.9°F) |
18.4 ° C (65.1°F) |
14.6 ° C (58.2°F) |
% 70 | 11% | 5.3 | Sunrise:06:37 AM Sunset: 06:42 PM |
Moonrise:05:48 PM Moonset: 04:33 AM Moon Phase ( Full Moon ) |
|
| 25 September 2026 Friday | Overcast |
13.3 ° C (55.9°F) |
17 ° C (62.5°F) |
14.6 ° C (58.4°F) |
% 68 | 18% | 2.9 | Sunrise:06:38 AM Sunset: 06:41 PM |
Moonrise:06:07 PM Moonset: 05:35 AM Moon Phase ( Full Moon ) |
|
| 26 September 2026 Saturday |  Moderate rain |
13.2 ° C (55.8°F) |
15.1 ° C (59.2°F) |
13.9 ° C (57°F) |
% 86 | 91% | 0.7 | Sunrise:06:40 AM Sunset: 06:39 PM |
Moonrise:06:27 PM Moonset: 06:37 AM Moon Phase ( Full Moon ) |
|
| 27 September 2026 Sunday | Moderate rain |
13.3 ° C (56°F) |
14.3 ° C (57.7°F) |
13.7 ° C (56.6°F) |
% 90 | 92% | 0.4 | Sunrise:06:41 AM Sunset: 06:37 PM |
Moonrise:06:48 PM Moonset: 07:41 AM Moon Phase ( Waning Gibbous ) |
|
| 28 September 2026 Monday |  Patchy rain nearby |
13 ° C (55.4°F) |
14.5 ° C (58.1°F) |
14 ° C (57.3°F) |
% 86 | 78% | 3 | Sunrise:06:42 AM Sunset: 06:35 PM |
Moonrise:07:13 PM Moonset: 08:47 AM Moon Phase ( Waning Gibbous ) |
|
| 29 September 2026 Tuesday |  Partly Cloudy |
14.6 ° C (58.3°F) |
18.6 ° C (65.5°F) |
16.7 ° C (62°F) |
% 79 | 20% | 5 | Sunrise:06:43 AM Sunset: 06:34 PM |
Moonrise:07:42 PM Moonset: 09:56 AM Moon Phase ( Waning Gibbous ) |
|
| 30 September 2026 Wednesday | Overcast |
16.6 ° C (62°F) |
20.1 ° C (68.2°F) |
18.7 ° C (65.7°F) |
% 83 | 20% | 5 | Sunrise:06:44 AM Sunset: 06:32 PM |
Moonrise:08:18 PM Moonset: 11:07 AM Moon Phase ( Waning Gibbous ) |
|
| 01 October 2026 Thursday |  Light rain shower |
17.1 ° C (62.9°F) |
20.6 ° C (69°F) |
19.8 ° C (67.6°F) |
% 81 | 77% | 6 | Sunrise:06:45 AM Sunset: 06:30 PM |
Moonrise:09:05 PM Moonset: 12:17 PM Moon Phase ( Last Quarter ) |
|
| 02 October 2026 Friday | Sunny |
14.3 ° C (57.8°F) |
19.9 ° C (67.9°F) |
17.1 ° C (62.8°F) |
% 60 | 5% | 5 | Sunrise:06:46 AM Sunset: 06:29 PM |
Moonrise:10:02 PM Moonset: 01:22 PM Moon Phase ( Last Quarter ) |
|
| 03 October 2026 Saturday | Overcast |
14.1 ° C (57.4°F) |
18.9 ° C (66°F) |
17 ° C (62.6°F) |
% 64 | 68% | 4 | Sunrise:06:47 AM Sunset: 06:27 PM |
Moonrise:11:10 PM Moonset: 02:19 PM Moon Phase ( Last Quarter ) |
|
| 04 October 2026 Sunday | Overcast |
14.7 ° C (58.5°F) |
18.5 ° C (65.3°F) |
17.1 ° C (62.7°F) |
% 94 | 93% | 4 | Sunrise:06:48 AM Sunset: 06:25 PM |
Moonrise:Does not rise today Moonset: 03:06 PM Moon Phase ( Last Quarter ) |
|
| 05 October 2026 Monday | Patchy rain nearby |
16.1 ° C (61°F) |
18 ° C (64.3°F) |
16.9 ° C (62.5°F) |
% 92 | 92% | 4 | Sunrise:06:49 AM Sunset: 06:24 PM |
Moonrise:12:25 AM Moonset: 03:45 PM Moon Phase ( Waning Crescent ) |
|
| 06 October 2026 Tuesday | Light rain shower |
12.5 ° C (54.5°F) |
16.2 ° C (61.2°F) |
15.3 ° C (59.5°F) |
% 89 | 88% | 5 | Sunrise:06:50 AM Sunset: 06:22 PM |
Moonrise:01:43 AM Moonset: 04:16 PM Moon Phase ( Waning Crescent ) |
|
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