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January Weather in Smithfield, United States

Last updated: June 24, 2025

In Smithfield, United States, the average temperature in January hovers around 0°C (32°F). Expect a chilling minimum of -26°C (-14°F) and a pleasant maximum of 21°C (71°F). During this month, precipitation totals about 88 mm (3.5 in), spread over 13 days, contributing to an average humidity of 86%.

January Temperature in Smithfield

In January in Smithfield, the average temperature is 0°C (32°F). Maximum can reach 21°C (71°F) and minimum can be as low as -26°C (-14°F). Travelers should be prepared for a wide range of temperatures, from chilly to mild, during this month.

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 0°C (32°F), with highs reaching up to 21°C (71°F) and lows dropping to around -26°C (-14°F).
JanFebMarAprMayJunJulAugSepOctNovDec323742526269747267574337
Data source: Temperature data for Smithfield 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 Smithfield

In Smithfield in January, the precipitation amount is 88 mm (3.5 in) spread over 13 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 88 mm (3.5 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec881371161341441511149410711586126
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Smithfield

In Smithfield in January humidity is 86%. With an average temperature of 0°C (32°F), this humidity feels like a biting chill that seeps into your bones, making travel feel uncomfortable and damp, as the cold air combines with the moisture to create a brisk sensation that may deter outdoor exploration.

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 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%84%78%79%70%59%68%80%87%85%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3579101010108753
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.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)88 mm (3.5 inches)86%moderate
February Weather3°C (37°F)137 mm (5.4 inches)86%moderate
March Weather6°C (43°F)116 mm (4.6 inches)86%high
April Weather11°C (52°F)134 mm (5.3 inches)84%very high
May Weather17°C (62°F)144 mm (5.7 inches)78%very high
June Weather21°C (69°F)151 mm (5.9 inches)79%very high
July Weather23°C (74°F)114 mm (4.5 inches)70%very high
August Weather22°C (72°F)94 mm (3.7 inches)59%very high
September Weather19°C (67°F)107 mm (4.2 inches)68%very high
October Weather14°C (57°F)115 mm (4.5 inches)80%high
November Weather6°C (43°F)86 mm (3.4 inches)86%moderate
December Weather3°C (37°F)126 mm (4.9 inches)85%moderate

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