January Weather in Groton

Last updated: March 2, 2024

The weather in Groton, United States, during January is characterized by an average temperature of 2°C (35°F). Highs can soar to 11°C (53°F), while lows may dip to -12°C (11°F). Typically, the humidity level in Groton throughout January hovers around 84%.

-12°C (11°F)

Minimum temperature

2°C (35°F)

Average temperature

11°C (53°F)

Maximum temperature

84%

Humidity

Precipitation and Sunshine hours

In January, Groton averages 83 mm (3.3 inches) of rainfall, typically over the course of 8 rainy days. The month enjoys an average of 9 hours 33 minutes of daylight, with the sun shining for approximately 4 hours 54 minutes each day. Additionally, there is a 49% probability of sunny days during this period.

83 mm (3.3 inches)

Precipitation

8 rainy days

Rainy days

4 hours 54 minutes

Sunshine hours

49%

Chance of sun

UV Index

In January, the UV Index in Groton reaches a maximum of 3, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 30 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 1 1 1 2 2 3 2 2 1 1 0 0 0
Exposure Low Moderate Low
Time to burn 45 min 30 min 45 min

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