January Weather in Hartley, United States

Last updated: June 24, 2025

In Hartley, United States, the average temperature in January hovers around 3°C (37°F). Expect a chilly minimum of -17°C (2°F), while temperatures can rise to a comfortable 23°C (74°F). Precipitation during this month totals 15 mm (0.6 in) spread over just 2 days, and the air carries an average humidity of 74%, adding a crisp freshness to the atmosphere.

January Temperature in Hartley

In January in Hartley, the average temperature is 3°C (37°F). The maximum can reach 23°C (74°F), while the minimum can plummet to as low as -17°C (2°F). Be sure to pack layers and prepare for a wide range of temperatures if you're planning to travel during this time.

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

The chart illustrates January temperature patterns in Hartley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hartley, January typically has an average temperature of 3°C (37°F), with highs reaching up to 23°C (74°F) and lows dropping to around -17°C (2°F).

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

January Precipitation in Hartley

In Hartley in January, the precipitation amount is 15 mm (0.6 in) over the course of 2 days.

January Precipitation Trends in Hartley

The chart displays monthly precipitation patterns in Hartley, 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 Hartley, January typically receives around 15 mm (0.6 inches) of precipitation spread over approximately 2 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 Hartley

In Hartley in January, humidity is 74%. With an average temperature of 3°C (37°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and prompting travelers to seek out cozy indoor spots for warmth and comfort.

January Average Humidity in Hartley

This chart illustrates the average monthly humidity levels in Hartley, 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 Hartley is approximately 74%, 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 Hartley

In Hartley 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 Hartley for better planning.

Maximum UV Index Levels in Hartley for January

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

Data source: Hartley 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 Hartley Compares to Other Months

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

This table compares monthly weather conditions in Hartley, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (37°F)	15 mm (0.6 inches)	74%	moderate
February Weather	3°C (39°F)	10 mm (0.4 inches)	75%	high
March Weather	10°C (50°F)	39 mm (1.5 inches)	61%	very high
April Weather	13°C (56°F)	37 mm (1.5 inches)	61%	extreme
May Weather	19°C (66°F)	58 mm (2.3 inches)	69%	extreme
June Weather	24°C (76°F)	43 mm (1.7 inches)	74%	extreme
July Weather	26°C (79°F)	29 mm (1.1 inches)	75%	extreme
August Weather	25°C (77°F)	54 mm (2.1 inches)	78%	extreme
September Weather	22°C (71°F)	31 mm (1.2 inches)	76%	very high
October Weather	14°C (57°F)	50 mm (2.0 inches)	76%	high
November Weather	8°C (47°F)	11 mm (0.5 inches)	80%	moderate
December Weather	4°C (40°F)	14 mm (0.6 inches)	77%	moderate