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January Weather in Rocky Hill, United States

Last updated: June 24, 2025

In January, the average temperature in Rocky Hill, United States hovers around 1°C (34°F), with minimum temperatures dipping to a chilly -17°C (1°F) and maximums reaching a mild 19°C (67°F). Expect 67 mm (2.6 in) of precipitation spread over 8 days, accompanied by a high average humidity of 84%.

January Temperature in Rocky Hill

In January in Rocky Hill, the average temperature is 1°C (34°F). Maximum temperatures can reach 19°C (67°F), while the minimum can dip as low as -17°C (1°F). Be prepared for a wide range of temperatures when traveling to Rocky Hill during this month.

January Weather in Rocky Hill: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Rocky Hill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rocky Hill, January typically has an average temperature of 1°C (34°F), with highs reaching up to 19°C (67°F) and lows dropping to around -17°C (1°F).
JanFebMarAprMayJunJulAugSepOctNovDec343742526272777569594538
Data source: Temperature data for Rocky Hill generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Rocky Hill

In Rocky Hill in January, the total precipitation amount is 67 mm (2.6 in) over the course of 8 days.

January Precipitation Trends in Rocky Hill

The chart displays monthly precipitation patterns in Rocky Hill, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Rocky Hill, January typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec671061071051281011341389212783104
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Rocky Hill

In Rocky Hill in January humidity is 84%. With an average temperature of 1°C (34°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and requiring extra layers to keep warm while navigating the damp air.

January Average Humidity in Rocky Hill

This chart illustrates the average monthly humidity levels in Rocky Hill, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Rocky Hill is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Rocky Hill

In Rocky Hill in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Rocky Hill, you can check the information here.

Maximum UV Index Levels in Rocky Hill for January

The chart shows the monthly maximum UV Index (UVI) for Rocky Hill in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Rocky Hill typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Rocky Hill January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How January Weather in Rocky Hill Compares to Other Months

Weather in Rocky Hill varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Rocky Hill, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Rocky Hill, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)67 mm (2.6 inches)84%moderate
February Weather3°C (37°F)106 mm (4.2 inches)82%moderate
March Weather6°C (42°F)107 mm (4.2 inches)81%high
April Weather11°C (53°F)105 mm (4.1 inches)78%very high
May Weather17°C (62°F)128 mm (5.0 inches)69%very high
June Weather22°C (72°F)101 mm (4.0 inches)69%very high
July Weather25°C (78°F)134 mm (5.3 inches)62%very high
August Weather24°C (75°F)138 mm (5.4 inches)65%very high
September Weather21°C (70°F)92 mm (3.6 inches)68%very high
October Weather15°C (60°F)127 mm (5.0 inches)74%high
November Weather7°C (45°F)83 mm (3.3 inches)82%moderate
December Weather3°C (38°F)104 mm (4.1 inches)80%low

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