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January Weather in Fort Smith, United States

Last updated: June 24, 2025

In Fort Smith, United States, the average temperature in January hovers around 4°C (40°F). Expect a chilly minimum of -16°C (4°F), with a pleasant maximum reaching 23°C (74°F). During this month, you can anticipate 98 mm (3.9 in) of precipitation spread over 9 days, accompanied by an average humidity level of 82%.

January Temperature in Fort Smith

In January in Fort Smith, the average temperature is 4°C (40°F). Maximum temperatures can reach 23°C (74°F), while minimum temperatures can drop as low as -16°C (4°F). This wide temperature range suggests that travelers should be well-prepared for both chilly and warm conditions when visiting.

January Weather in Fort Smith: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Fort Smith, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Fort Smith, January typically has an average temperature of 4°C (40°F), with highs reaching up to 23°C (74°F) and lows dropping to around -16°C (4°F).
JanFebMarAprMayJunJulAugSepOctNovDec404354596978817975625045
Data source: Temperature data for Fort Smith 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 Fort Smith

In Fort Smith in January, the precipitation amount is 98 mm (3.9 in) spread over a duration of 9 days.

January Precipitation Trends in Fort Smith

The chart displays monthly precipitation patterns in Fort Smith, 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 Fort Smith, January typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec981231421572139198132781518798
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Fort Smith

In Fort Smith in January, humidity is 82%. With an average temperature of 4°C (40°F), this humidity feels like a chilly dampness that lingers in the air, making travel slightly uncomfortable as the cold penetrates through layers of clothing, often leaving you feeling chilled and clammy.

January Average Humidity in Fort Smith

This chart illustrates the average monthly humidity levels in Fort Smith, 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 Fort Smith is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%79%77%78%82%81%75%61%59%69%82%88%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Fort Smith

In Fort Smith in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Fort Smith for better planning.

Maximum UV Index Levels in Fort Smith for January

The chart shows the monthly maximum UV Index (UVI) for Fort Smith 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 Fort Smith typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46710111111109754
Data source: Fort Smith 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 Fort Smith Compares to Other Months

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

This table compares monthly weather conditions in Fort Smith, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)98 mm (3.9 inches)82%moderate
February Weather6°C (43°F)123 mm (4.8 inches)79%high
March Weather12°C (54°F)141 mm (5.6 inches)77%high
April Weather15°C (60°F)157 mm (6.2 inches)78%very high
May Weather21°C (70°F)213 mm (8.4 inches)82%extreme
June Weather25°C (78°F)91 mm (3.6 inches)81%extreme
July Weather27°C (81°F)98 mm (3.8 inches)75%extreme
August Weather26°C (79°F)132 mm (5.2 inches)61%very high
September Weather24°C (76°F)78 mm (3.1 inches)59%very high
October Weather17°C (63°F)151 mm (5.9 inches)69%high
November Weather10°C (50°F)87 mm (3.4 inches)82%moderate
December Weather7°C (46°F)98 mm (3.9 inches)87%moderate

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