January Weather in Bethlehem, United States

Last updated: June 24, 2025

In January, the average temperature in Bethlehem, United States hovers around 7°C (46°F). Expect to experience a minimum chill of -10°C (14°F) and the possibility of warmth reaching up to 24°C (76°F). With an average precipitation of 108 mm (4.3 in) spread over 9 days, don't forget your umbrella! The atmosphere is notably humid, with an average humidity level of 86%, making for a uniquely refreshing experience.

January Temperature in Bethlehem

In January in Bethlehem, the average temperature is 7°C (46°F). Maximums can reach 24°C (76°F) and minimums can drop as low as -10°C (14°F). Travelers should be prepared for a wide range of temperatures during this time.

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

The chart illustrates January temperature patterns in Bethlehem, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bethlehem, January typically has an average temperature of 7°C (46°F), with highs reaching up to 24°C (76°F) and lows dropping to around -10°C (14°F).

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

January Precipitation in Bethlehem

In Bethlehem in January, the precipitation amount is 108 mm (4.3 in) spread over 9 days.

January Precipitation Trends in Bethlehem

The chart displays monthly precipitation patterns in Bethlehem, 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 Bethlehem, January typically receives around 108 mm (4.3 inches) of precipitation spread over approximately 9 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 Bethlehem

In Bethlehem in January humidity is 86%. With an average temperature of 7°C (46°F), this humidity feels like wrapping yourself in a damp blanket, making travel uncomfortable and heavy, as the cold air mixes with the muggy atmosphere, leaving you longing for a warm, dry refuge.

January Average Humidity in Bethlehem

This chart illustrates the average monthly humidity levels in Bethlehem, 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 Bethlehem 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 Bethlehem

In Bethlehem 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 Bethlehem for better planning.

Maximum UV Index Levels in Bethlehem for January

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

Data source: Bethlehem 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 Bethlehem Compares to Other Months

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

This table compares monthly weather conditions in Bethlehem, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (46°F)	108 mm (4.3 inches)	86%	moderate
February Weather	10°C (51°F)	147 mm (5.8 inches)	84%	high
March Weather	13°C (56°F)	130 mm (5.1 inches)	83%	very high
April Weather	17°C (62°F)	123 mm (4.8 inches)	81%	very high
May Weather	21°C (71°F)	125 mm (4.9 inches)	81%	extreme
June Weather	24°C (76°F)	127 mm (5.0 inches)	81%	extreme
July Weather	26°C (79°F)	118 mm (4.7 inches)	83%	extreme
August Weather	26°C (78°F)	147 mm (5.8 inches)	81%	very high
September Weather	23°C (75°F)	116 mm (4.6 inches)	82%	very high
October Weather	19°C (66°F)	141 mm (5.5 inches)	78%	very high
November Weather	11°C (52°F)	80 mm (3.1 inches)	86%	high
December Weather	9°C (48°F)	135 mm (5.3 inches)	89%	moderate