January Weather in Wellington, United States

Last updated: June 24, 2025

In January, the average temperature in Wellington, United States hovers around -1°C (30°F), with a minimum dipping to -21°C (-5°F) and a maximum reaching 18°C (64°F). Expect precipitation to amount to 86 mm (3.4 in) over approximately 12 days, contributing to an average humidity of a rather high 88%.

January Temperature in Wellington

In January in Wellington, the average temperature is -1°C (30°F). Maximum temperatures can reach up to 18°C (64°F), while the minimum can drop as low as -21°C (-5°F). Be prepared for a wide range of temperatures, so pack layers to stay comfortable during your travels.

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

The chart illustrates January temperature patterns in Wellington, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Wellington, January typically has an average temperature of -1°C (30°F), with highs reaching up to 18°C (64°F) and lows dropping to around -21°C (-5°F).

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

January Precipitation in Wellington

In Wellington in January, the precipitation amount is 86 mm (3.4 in) over a span of 12 days.

January Precipitation Trends in Wellington

The chart displays monthly precipitation patterns in Wellington, 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 Wellington, January typically receives around 86 mm (3.4 inches) of precipitation spread over approximately 12 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 Wellington

In Wellington in January humidity is 88%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that penetrates through your layers, making travel uncomfortable as every gust of wind becomes a sharp reminder of the cold and damp air surrounding you.

January Average Humidity in Wellington

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

In Wellington 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 Wellington, you can check the information here.

Maximum UV Index Levels in Wellington for January

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

Data source: Wellington 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 Wellington Compares to Other Months

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

This table compares monthly weather conditions in Wellington, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	86 mm (3.4 inches)	88%	moderate
February Weather	0°C (32°F)	97 mm (3.8 inches)	88%	moderate
March Weather	4°C (39°F)	99 mm (3.9 inches)	87%	high
April Weather	9°C (49°F)	124 mm (4.9 inches)	87%	very high
May Weather	16°C (61°F)	126 mm (5.0 inches)	81%	very high
June Weather	21°C (70°F)	129 mm (5.1 inches)	83%	very high
July Weather	24°C (75°F)	124 mm (4.9 inches)	82%	very high
August Weather	23°C (73°F)	91 mm (3.6 inches)	76%	very high
September Weather	20°C (68°F)	86 mm (3.4 inches)	77%	very high
October Weather	14°C (57°F)	107 mm (4.2 inches)	82%	high
November Weather	5°C (42°F)	100 mm (3.9 inches)	89%	moderate
December Weather	2°C (35°F)	92 mm (3.6 inches)	86%	low