January Weather in Smithfield, United States

Last updated: June 24, 2025

In Smithfield, United States, the average temperature in January hovers around -5°C (23°F), with potential lows dipping to -25°C (-14°F) and highs reaching up to 7°C (45°F). During this month, expect about 67 mm (2.7 in) of precipitation spread across 10 days, while the air remains notably humid with an average humidity of 91%.

January Temperature in Smithfield

In January in Smithfield, the average temperature is -5°C (23°F). Maximum temperatures can reach 7°C (45°F), while minimums can drop as low as -25°C (-14°F). Travelers should prepare for a cold climate and dress warmly to enjoy their visit.

January Weather in Smithfield: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Smithfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Smithfield, January typically has an average temperature of -5°C (23°F), with highs reaching up to 7°C (45°F) and lows dropping to around -25°C (-14°F).

Data source: Temperature data for Smithfield generated using information from the Copernicus Climate Change Service.

January Precipitation in Smithfield

In Smithfield in January, the precipitation amount is 67 mm (2.7 in) over a span of 10 days.

January Precipitation Trends in Smithfield

The chart displays monthly precipitation patterns in Smithfield, 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 Smithfield, January typically receives around 67 mm (2.7 inches) of precipitation spread over approximately 10 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Smithfield

In Smithfield in January, humidity is 91%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and pushing you to seek warmth at every opportunity.

January Average Humidity in Smithfield

This chart illustrates the average monthly humidity levels in Smithfield, 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 Smithfield is approximately 91%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Smithfield

In Smithfield 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 Smithfield, you can check the information here.

Maximum UV Index Levels in Smithfield for January

The chart shows the monthly maximum UV Index (UVI) for Smithfield 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 Smithfield typically reaches 3, which falls under the moderate exposure category.

Data source: Smithfield 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 Smithfield Compares to Other Months

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

This table compares monthly weather conditions in Smithfield, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	67 mm (2.7 inches)	91%	moderate
February Weather	-4°C (26°F)	86 mm (3.4 inches)	92%	moderate
March Weather	1°C (35°F)	64 mm (2.5 inches)	84%	very high
April Weather	5°C (40°F)	78 mm (3.1 inches)	74%	very high
May Weather	10°C (50°F)	67 mm (2.7 inches)	62%	extreme
June Weather	17°C (63°F)	28 mm (1.1 inches)	56%	extreme
July Weather	22°C (71°F)	22 mm (0.9 inches)	44%	extreme
August Weather	20°C (69°F)	27 mm (1.1 inches)	37%	extreme
September Weather	15°C (59°F)	35 mm (1.4 inches)	46%	very high
October Weather	6°C (43°F)	46 mm (1.8 inches)	67%	high
November Weather	1°C (33°F)	56 mm (2.2 inches)	84%	moderate
December Weather	-5°C (23°F)	60 mm (2.3 inches)	88%	moderate