January Weather in Sandown, United States

Last updated: June 24, 2025

In Sandown, United States, the average temperature in January hovers around -3°C (28°F), with fluctuations ranging from a frigid -23°C (-9°F) to a surprisingly mild 19°C (67°F). Expect about 70 mm (2.7 in) of precipitation spread across 8 days, while the air remains notably damp with an average humidity of 86%.

January Temperature in Sandown

In January in Sandown, the average temperature is -3°C (28°F), with maximums that can reach 19°C (67°F) and minimums that can drop as low as -23°C (-9°F). When traveling during this time, be prepared for a wide range of temperatures and dress in layers to stay comfortable.

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

The chart illustrates January temperature patterns in Sandown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sandown, January typically has an average temperature of -3°C (28°F), with highs reaching up to 19°C (67°F) and lows dropping to around -23°C (-9°F).

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

January Precipitation in Sandown

In Sandown in January, the precipitation amount is 70 mm (2.7 in) spread over 8 days.

January Precipitation Trends in Sandown

The chart displays monthly precipitation patterns in Sandown, 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 Sandown, January typically receives around 70 mm (2.7 inches) of precipitation spread over approximately 8 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 Sandown

In Sandown in January, humidity is 86%. With an average temperature of -3°C (28°F), this humidity feels like a biting chill that seeps through layers of clothing, making travel outside quite uncomfortable and necessitating frequent warm-up breaks indoors.

January Average Humidity in Sandown

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

In Sandown in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Sandown, you can check the information here.

Maximum UV Index Levels in Sandown for January

The chart shows the monthly maximum UV Index (UVI) for Sandown 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 Sandown typically reaches 3, which falls under the moderate exposure category.

Data source: Sandown 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 Sandown Compares to Other Months

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

This table compares monthly weather conditions in Sandown, 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 (28°F)	70 mm (2.7 inches)	86%	moderate
February Weather	-1°C (30°F)	84 mm (3.3 inches)	84%	moderate
March Weather	2°C (36°F)	82 mm (3.2 inches)	82%	moderate
April Weather	8°C (47°F)	128 mm (5.0 inches)	80%	very high
May Weather	15°C (58°F)	77 mm (3.0 inches)	72%	very high
June Weather	20°C (69°F)	89 mm (3.5 inches)	72%	very high
July Weather	23°C (74°F)	135 mm (5.3 inches)	67%	very high
August Weather	23°C (73°F)	75 mm (2.9 inches)	66%	very high
September Weather	19°C (66°F)	72 mm (2.8 inches)	71%	high
October Weather	12°C (54°F)	125 mm (4.9 inches)	78%	moderate
November Weather	4°C (40°F)	99 mm (3.9 inches)	84%	moderate
December Weather	-1°C (31°F)	122 mm (4.8 inches)	81%	low