January Weather in Myrtle, United States

Last updated: June 24, 2025

In January, the average temperature in Myrtle, United States hovers around 7°C (44°F), presenting a mix of chilly and temperate days. The temperature can dip as low as -14°C (8°F) while peaking at a pleasant 25°C (76°F). Expect about 120 mm (4.7 in) of precipitation spread across 8 days, paired with a relatively high average humidity of 86%. Perfect for those who enjoy a cool, damp climate!

January Temperature in Myrtle

In January in Myrtle, the average temperature is 7°C (44°F), with maximums reaching 25°C (76°F) and minimums dipping as low as -14°C (8°F). Be prepared for a wide range of temperatures when traveling to Myrtle during this month.

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

The chart illustrates January temperature patterns in Myrtle, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Myrtle, January typically has an average temperature of 7°C (44°F), with highs reaching up to 25°C (76°F) and lows dropping to around -14°C (8°F).

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

January Precipitation in Myrtle

In Myrtle in January, the total precipitation amount reaches 120 mm (4.7 in) over the course of 8 days.

January Precipitation Trends in Myrtle

The chart displays monthly precipitation patterns in Myrtle, 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 Myrtle, January typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Myrtle

In Myrtle in January, humidity is 86%. With an average temperature of 7°C (44°F), this humidity feels like a chilly, damp blanket wrapping around you, making outdoor activities uncomfortable and travel quite uninviting.

January Average Humidity in Myrtle

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

In Myrtle 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 Myrtle for better planning.

Maximum UV Index Levels in Myrtle for January

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

Data source: Myrtle 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 Myrtle Compares to Other Months

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

This table compares monthly weather conditions in Myrtle, 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 (44°F)	120 mm (4.7 inches)	86%	moderate
February Weather	9°C (48°F)	188 mm (7.4 inches)	85%	high
March Weather	14°C (57°F)	157 mm (6.2 inches)	84%	very high
April Weather	16°C (62°F)	146 mm (5.8 inches)	81%	very high
May Weather	22°C (72°F)	110 mm (4.3 inches)	83%	extreme
June Weather	26°C (78°F)	133 mm (5.2 inches)	83%	extreme
July Weather	27°C (81°F)	118 mm (4.6 inches)	80%	extreme
August Weather	26°C (80°F)	113 mm (4.4 inches)	73%	very high
September Weather	24°C (76°F)	116 mm (4.6 inches)	70%	very high
October Weather	18°C (65°F)	106 mm (4.2 inches)	73%	high
November Weather	11°C (51°F)	79 mm (3.1 inches)	85%	high
December Weather	9°C (48°F)	150 mm (5.9 inches)	88%	moderate