January Weather in Cornish, United States

Last updated: June 24, 2025

In January, the average temperature in Cornish, United States hovers around -5°C (24°F). Be prepared for chilly conditions as the minimum can plummet to -26°C (-14°F), while the maximum may reach a mild 15°C (59°F). With 79 mm (3.1 in) of precipitation spread over 8 days, you can expect some wet weather. Additionally, an average humidity of 86% adds to the brisk atmosphere, making layering essential for comfort!

January Temperature in Cornish

In January in Cornish, the average temperature is -5°C (24°F), with maximums reaching 15°C (59°F) and minimums plummeting to as low as -26°C (-14°F). Travelers should be prepared for a wide range of temperatures, ensuring they dress in layers to stay comfortable in both chilly and mild conditions.

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

The chart illustrates January temperature patterns in Cornish, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cornish, January typically has an average temperature of -5°C (24°F), with highs reaching up to 15°C (59°F) and lows dropping to around -26°C (-14°F).

Data source: Temperature data for Cornish generated using information from the Copernicus Climate Change Service.

January Precipitation in Cornish

In Cornish in January, the precipitation amount is 79 mm (3.1 in) during 8 days, indicating a relatively wet period for the area.

January Precipitation Trends in Cornish

The chart displays monthly precipitation patterns in Cornish, 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 Cornish, January typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 8 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Cornish

In Cornish in January, humidity is 86%. With an average temperature of -5°C (24°F), this humidity feels like a damp chill that seeps into your bones, making traveling uncomfortable as even the slightest breeze becomes biting, and your clothing clings uncomfortably to your skin.

January Average Humidity in Cornish

This chart illustrates the average monthly humidity levels in Cornish, 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 Cornish is approximately 86%, 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 Cornish

In Cornish 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 Cornish, you can visit Hourly UV Index in Cornish.

Maximum UV Index Levels in Cornish for January

The chart shows the monthly maximum UV Index (UVI) for Cornish 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 Cornish typically reaches 2, which falls under the low exposure category.

Data source: Cornish 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 Cornish Compares to Other Months

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

This table compares monthly weather conditions in Cornish, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (24°F)	79 mm (3.1 inches)	86%	low
February Weather	-3°C (26°F)	89 mm (3.5 inches)	84%	moderate
March Weather	0°C (33°F)	77 mm (3.0 inches)	82%	moderate
April Weather	7°C (45°F)	123 mm (4.8 inches)	80%	very high
May Weather	13°C (56°F)	74 mm (2.9 inches)	72%	very high
June Weather	19°C (67°F)	87 mm (3.4 inches)	72%	very high
July Weather	22°C (72°F)	145 mm (5.7 inches)	67%	very high
August Weather	22°C (71°F)	82 mm (3.2 inches)	66%	very high
September Weather	18°C (64°F)	64 mm (2.5 inches)	71%	high
October Weather	11°C (52°F)	121 mm (4.8 inches)	78%	moderate
November Weather	3°C (39°F)	107 mm (4.2 inches)	84%	moderate
December Weather	-2°C (28°F)	114 mm (4.5 inches)	81%	low