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January Weather in Grundy, United States

Last updated: June 24, 2025

In January, the average temperature in Grundy, United States hovers around 2°C (37°F), with fluctuations that can see the minimum plunge to -17°C (1°F) and the maximum soar to 22°C (72°F). Be prepared for some wet weather, as 98 mm (3.8 in) of precipitation is expected over approximately 13 days. With an average humidity of 87%, it’s a month where you might want to bundle up and stay dry!

January Temperature in Grundy

In January in Grundy, the average temperature is 2°C (37°F). Maximum temperatures can reach 22°C (72°F), while minimum temperatures can drop as low as -17°C (1°F). Be prepared for a wide range of temperatures when traveling during this time.

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

The chart illustrates January temperature patterns in Grundy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grundy, January typically has an average temperature of 2°C (37°F), with highs reaching up to 22°C (72°F) and lows dropping to around -17°C (1°F).
JanFebMarAprMayJunJulAugSepOctNovDec364247556470747268594541
Data source: Temperature data for Grundy 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 Grundy

In Grundy in January, the precipitation amount is 98 mm (3.8 in) spread over 13 days.

January Precipitation Trends in Grundy

The chart displays monthly precipitation patterns in Grundy, 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 Grundy, January typically receives around 98 mm (3.8 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec9816812614313815210712410513083129
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Grundy

In Grundy in January, humidity is 87%. With an average temperature of 2°C (37°F), this humidity feels like an uncomfortable chill that seeps into your bones, making every step feel heavier and each breath a reminder of the dampness in the air, which can be quite challenging for traveling.

January Average Humidity in Grundy

This chart illustrates the average monthly humidity levels in Grundy, 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 Grundy is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%86%84%83%83%79%66%68%78%89%86%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Grundy

In Grundy 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 Grundy, you can check the information here.

Maximum UV Index Levels in Grundy for January

The chart shows the monthly maximum UV Index (UVI) for Grundy 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 Grundy typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
Data source: Grundy 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 Grundy Compares to Other Months

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

This table compares monthly weather conditions in Grundy, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (37°F)98 mm (3.8 inches)87%moderate
February Weather5°C (42°F)168 mm (6.6 inches)87%high
March Weather8°C (47°F)126 mm (5.0 inches)86%very high
April Weather13°C (55°F)143 mm (5.6 inches)84%very high
May Weather18°C (64°F)138 mm (5.4 inches)83%extreme
June Weather21°C (70°F)152 mm (6.0 inches)83%extreme
July Weather23°C (74°F)107 mm (4.2 inches)79%extreme
August Weather22°C (72°F)124 mm (4.9 inches)66%very high
September Weather20°C (68°F)105 mm (4.1 inches)68%very high
October Weather15°C (59°F)130 mm (5.1 inches)78%high
November Weather7°C (45°F)82 mm (3.2 inches)89%moderate
December Weather5°C (41°F)129 mm (5.1 inches)86%moderate

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