January Weather in Smithfield, United States

Last updated: June 24, 2025

In January, the average temperature in Smithfield, United States hovers around -7°C (20°F). While temperatures can plummet to a chilling -31°C (-23°F), they might also peak at a milder 11°C (53°F). Expect approximately 84 mm (3.3 in) of precipitation spread over 8 days, contributing to an impressive average humidity of 88%. Prepare for a wintry experience!

January Temperature in Smithfield

In January in Smithfield, the average temperature is -7°C (20°F), with a maximum that can reach 11°C (53°F) and a minimum that can be as low as -31°C (-23°F). Travelers should be prepared for a wide range of temperatures and dress warmly to ensure a comfortable 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 -7°C (20°F), with highs reaching up to 11°C (53°F) and lows dropping to around -31°C (-23°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 84 mm (3.3 in) spread over 8 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 84 mm (3.3 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Smithfield

In Smithfield in January, humidity is 88%. With an average temperature of -7°C (20°F), this humidity feels like a biting, cold dampness that seeps into your clothes, making every step outside a struggle against the relentless chill and moisture that seems to cling to your skin.

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 88%, 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 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Smithfield, you can visit Hourly UV Index in Smithfield.

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 2, which falls under the low 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	-7°C (20°F)	84 mm (3.3 inches)	88%	low
February Weather	-5°C (22°F)	81 mm (3.2 inches)	88%	moderate
March Weather	-1°C (30°F)	72 mm (2.8 inches)	85%	moderate
April Weather	6°C (43°F)	121 mm (4.8 inches)	81%	high
May Weather	12°C (55°F)	85 mm (3.3 inches)	76%	very high
June Weather	18°C (65°F)	76 mm (3.0 inches)	74%	very high
July Weather	21°C (70°F)	110 mm (4.3 inches)	74%	very high
August Weather	20°C (69°F)	72 mm (2.8 inches)	74%	very high
September Weather	16°C (62°F)	70 mm (2.7 inches)	77%	high
October Weather	10°C (50°F)	124 mm (4.9 inches)	82%	moderate
November Weather	2°C (36°F)	108 mm (4.3 inches)	85%	moderate
December Weather	-4°C (25°F)	112 mm (4.4 inches)	84%	low