January Weather in Arnold, United States

Last updated: June 24, 2025

In January, the average temperature in Arnold, United States hovers around 4°C (39°F). You can expect chilly days, with minimum temperatures dipping as low as -14°C (7°F) and occasional highs reaching 19°C (67°F). Be prepared for wet weather, as 258 mm (10.2 in) of precipitation typically falls over 10 days, contributing to an average humidity level of 84%. Don't forget your raincoat!

January Temperature in Arnold

In January in Arnold, the average temperature is 4°C (39°F), with maximums reaching up to 19°C (67°F) and minimums plunging as low as -14°C (7°F). Be prepared for a wide temperature range if you're planning to travel during this time.

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

The chart illustrates January temperature patterns in Arnold, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arnold, January typically has an average temperature of 4°C (39°F), with highs reaching up to 19°C (67°F) and lows dropping to around -14°C (7°F).

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

January Precipitation in Arnold

In Arnold in January, the total precipitation amount is 258 mm (10.2 in) over a span of 10 days.

January Precipitation Trends in Arnold

The chart displays monthly precipitation patterns in Arnold, 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 Arnold, January typically receives around 258 mm (10.2 inches) of precipitation spread over approximately 10 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 Arnold

In Arnold in January, humidity is 84%. With an average temperature of 4°C (39°F), this humidity feels like a damp chill that seeps into your bones, making outdoor excursions uncomfortable and demanding more layers than you anticipate while traveling.

January Average Humidity in Arnold

This chart illustrates the average monthly humidity levels in Arnold, 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 Arnold is approximately 84%, 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 Arnold

In Arnold 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 Arnold for better planning.

Maximum UV Index Levels in Arnold for January

The chart shows the monthly maximum UV Index (UVI) for Arnold 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 Arnold typically reaches 4, which falls under the moderate exposure category.

Data source: Arnold 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 Arnold Compares to Other Months

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

This table compares monthly weather conditions in Arnold, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (39°F)	258 mm (10.2 inches)	84%	moderate
February Weather	4°C (39°F)	260 mm (10.2 inches)	84%	moderate
March Weather	5°C (41°F)	277 mm (10.9 inches)	83%	very high
April Weather	9°C (48°F)	121 mm (4.8 inches)	81%	very high
May Weather	13°C (55°F)	82 mm (3.2 inches)	74%	extreme
June Weather	19°C (66°F)	16 mm (0.6 inches)	64%	extreme
July Weather	23°C (73°F)	2 mm (0.1 inches)	44%	extreme
August Weather	22°C (72°F)	6 mm (0.2 inches)	36%	extreme
September Weather	18°C (65°F)	12 mm (0.5 inches)	44%	very high
October Weather	13°C (55°F)	59 mm (2.3 inches)	65%	high
November Weather	8°C (46°F)	127 mm (5.0 inches)	84%	moderate
December Weather	4°C (39°F)	197 mm (7.8 inches)	83%	moderate