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January Weather in Jefferson City, United States

Last updated: June 24, 2025

The average temperature in Jefferson City, United States during January is a chilly 1°C (33°F). Prepare for extreme variations where the minimum can dip to -20°C (-4°F) and the maximum can soar to 21°C (69°F). Expect about 70 mm (2.8 in) of precipitation spread over 7 days, accompanied by an average humidity of 82%. Be ready for a diverse weather experience!

January Temperature in Jefferson City

In January in Jefferson City, the average temperature is 1°C (33°F), with maximums potentially reaching 21°C (69°F) and minimums dropping to as low as -20°C (-4°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack appropriately for both warmer and colder conditions.

January Weather in Jefferson City: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Jefferson City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jefferson City, January typically has an average temperature of 1°C (33°F), with highs reaching up to 21°C (69°F) and lows dropping to around -20°C (-4°F).
JanFebMarAprMayJunJulAugSepOctNovDec333647556676807672584539
Data source: Temperature data for Jefferson City 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 Jefferson City

In Jefferson City in January, the precipitation amount is 70 mm (2.8 in) over a span of 7 days.

January Precipitation Trends in Jefferson City

The chart displays monthly precipitation patterns in Jefferson City, 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 Jefferson City, January typically receives around 70 mm (2.8 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec7065120124163951099456995942
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Jefferson City

In Jefferson City in January humidity is 82%. With an average temperature of 1°C (33°F), this humidity feels like a biting chill that dampens your clothes and makes each breath a bit heavier, making travel uncomfortable and necessitating extra layers for warmth and protection against the moisture.

January Average Humidity in Jefferson City

This chart illustrates the average monthly humidity levels in Jefferson City, 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 Jefferson City is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Jefferson City

In Jefferson City 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 Jefferson City, you can check the information here.

Maximum UV Index Levels in Jefferson City for January

The chart shows the monthly maximum UV Index (UVI) for Jefferson City 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 Jefferson City typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109753
Data source: Jefferson City 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 Jefferson City Compares to Other Months

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

This table compares monthly weather conditions in Jefferson City, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (33°F)70 mm (2.8 inches)82%moderate
February Weather2°C (36°F)65 mm (2.6 inches)80%moderate
March Weather9°C (48°F)120 mm (4.7 inches)80%high
April Weather13°C (55°F)124 mm (4.9 inches)80%very high
May Weather19°C (67°F)163 mm (6.4 inches)82%very high
June Weather25°C (77°F)95 mm (3.7 inches)83%extreme
July Weather26°C (80°F)108 mm (4.3 inches)81%extreme
August Weather25°C (77°F)94 mm (3.7 inches)80%very high
September Weather22°C (73°F)56 mm (2.2 inches)76%very high
October Weather15°C (59°F)99 mm (3.9 inches)76%high
November Weather7°C (45°F)59 mm (2.3 inches)85%moderate
December Weather4°C (40°F)41 mm (1.6 inches)86%moderate

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