January Weather in Islesboro, United States

Last updated: June 24, 2025

In Islesboro, United States, the average temperature in January hovers around -2°C (28°F). However, be prepared for the extremes, as temperatures can dip to a chilling -18°C (0°F) or rise to a comfortable 10°C (51°F). Expect 112 mm (4.4 in) of precipitation spread over 9 days, contributing to an average humidity level of a brisk 88%.

January Temperature in Islesboro

In January in Islesboro, the average temperature is -2°C (28°F). The maximum can reach 10°C (51°F), while the minimum can drop as low as -18°C (0°F). This weather means that travelers should dress warmly and be prepared for a wide range of temperatures during their visit.

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

The chart illustrates January temperature patterns in Islesboro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Islesboro, January typically has an average temperature of -2°C (28°F), with highs reaching up to 10°C (51°F) and lows dropping to around -18°C (0°F).

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

January Precipitation in Islesboro

In Islesboro in January, the total precipitation amount is 112 mm (4.4 in), occurring over a span of 9 days.

January Precipitation Trends in Islesboro

The chart displays monthly precipitation patterns in Islesboro, 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 Islesboro, January typically receives around 112 mm (4.4 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 Islesboro

In Islesboro in January humidity is 88%. With an average temperature of -2°C (28°F), this humidity feels like an icy cling to your skin, making every breath feel brisk and sharp, while the dampness cuts through layers of clothing, leaving travelers yearning for warmth and comfort.

January Average Humidity in Islesboro

This chart illustrates the average monthly humidity levels in Islesboro, 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 Islesboro is approximately 88%, 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 Islesboro

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

Maximum UV Index Levels in Islesboro for January

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

Data source: Islesboro 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 Islesboro Compares to Other Months

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

This table compares monthly weather conditions in Islesboro, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-2°C (28°F)	112 mm (4.4 inches)	88%	low
February Weather	-2°C (29°F)	108 mm (4.2 inches)	88%	moderate
March Weather	0°C (33°F)	89 mm (3.5 inches)	85%	moderate
April Weather	5°C (41°F)	169 mm (6.7 inches)	81%	high
May Weather	9°C (49°F)	114 mm (4.5 inches)	76%	very high
June Weather	14°C (58°F)	87 mm (3.4 inches)	74%	very high
July Weather	17°C (63°F)	100 mm (3.9 inches)	74%	very high
August Weather	18°C (65°F)	90 mm (3.5 inches)	74%	very high
September Weather	16°C (61°F)	99 mm (3.9 inches)	77%	high
October Weather	12°C (54°F)	169 mm (6.6 inches)	82%	moderate
November Weather	6°C (42°F)	145 mm (5.7 inches)	85%	moderate
December Weather	0°C (33°F)	160 mm (6.3 inches)	84%	low