January Weather in Greenock, United States

Last updated: June 24, 2025

In January, the average temperature in Greenock, United States is a chilly 0°C (32°F), with minimum temperatures plunging to -23°C (-9°F) and a milder maximum reaching 22°C (72°F). Rainfall during this month totals 90 mm (3.6 in) over approximately 12 days, contributing to a rather high average humidity of 89%.

January Temperature in Greenock

In January in Greenock, the average temperature is 0°C (32°F). Maximum temperatures can reach 22°C (72°F), while minimums can drop as low as -23°C (-9°F). Thus, be prepared for a wide range of temperatures when traveling to Greenock during this month.

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

The chart illustrates January temperature patterns in Greenock, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Greenock, January typically has an average temperature of 0°C (32°F), with highs reaching up to 22°C (72°F) and lows dropping to around -23°C (-9°F).

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

January Precipitation in Greenock

In Greenock in January, the precipitation amount is 90 mm (3.6 in) spread over 12 days.

January Precipitation Trends in Greenock

The chart displays monthly precipitation patterns in Greenock, 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 Greenock, January typically receives around 90 mm (3.6 inches) of precipitation spread over approximately 12 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 Greenock

In Greenock in January humidity is 89%. With an average temperature of 0°C (32°F), this humidity feels like a chilly embrace that makes every breath feel heavy and damp, turning your travel experience into a constant dance with the cold and moisture in the air, leaving you longing for warmth and comfort at every turn.

January Average Humidity in Greenock

This chart illustrates the average monthly humidity levels in Greenock, 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 Greenock is approximately 89%, 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 Greenock

In Greenock 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 Greenock, you can check the information here.

Maximum UV Index Levels in Greenock for January

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

Data source: Greenock 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 Greenock Compares to Other Months

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

This table compares monthly weather conditions in Greenock, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (32°F)	90 mm (3.6 inches)	89%	moderate
February Weather	2°C (36°F)	125 mm (4.9 inches)	90%	moderate
March Weather	6°C (42°F)	114 mm (4.5 inches)	89%	high
April Weather	11°C (52°F)	129 mm (5.1 inches)	88%	very high
May Weather	17°C (63°F)	154 mm (6.1 inches)	80%	very high
June Weather	21°C (70°F)	163 mm (6.4 inches)	79%	very high
July Weather	24°C (75°F)	147 mm (5.8 inches)	74%	very high
August Weather	23°C (73°F)	96 mm (3.8 inches)	64%	very high
September Weather	20°C (68°F)	123 mm (4.9 inches)	67%	very high
October Weather	14°C (58°F)	121 mm (4.8 inches)	81%	high
November Weather	6°C (43°F)	90 mm (3.6 inches)	89%	moderate
December Weather	3°C (37°F)	110 mm (4.3 inches)	88%	low