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 chilly minimum plunging to -28°C (-18°F) and a rare maximum reaching 15°C (60°F). Expect 16 mm (0.6 in) of precipitation spread over 4 days, complemented by a notable average humidity of 84%.

January Temperature in Wellington

In January in Wellington, the average temperature is -1°C (30°F), with maximums reaching 15°C (60°F) and minimums dropping as low as -28°C (-18°F). It's advisable to pack warm clothing and be prepared for significant temperature fluctuations if you plan to travel during this time.

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 15°C (60°F) and lows dropping to around -28°C (-18°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 16 mm (0.6 in) over a span of 4 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 16 mm (0.6 inches) of precipitation spread over approximately 4 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 84%. With an average temperature of -1°C (30°F), this humidity feels like a sharp chill that seeps into your bones, making travel uncomfortable as the wetness in the air intensifies the cold, leaving you yearning for warmth and shelter.

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 84%, 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 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 Wellington for better planning.

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 4, 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)	16 mm (0.6 inches)	84%	moderate
February Weather	-2°C (28°F)	24 mm (0.9 inches)	85%	high
March Weather	4°C (39°F)	53 mm (2.1 inches)	75%	very high
April Weather	7°C (45°F)	54 mm (2.1 inches)	67%	very high
May Weather	12°C (54°F)	116 mm (4.6 inches)	67%	extreme
June Weather	19°C (67°F)	46 mm (1.8 inches)	68%	extreme
July Weather	22°C (73°F)	35 mm (1.4 inches)	62%	extreme
August Weather	21°C (71°F)	37 mm (1.5 inches)	63%	extreme
September Weather	18°C (64°F)	26 mm (1.0 inches)	63%	very high
October Weather	8°C (47°F)	36 mm (1.4 inches)	72%	high
November Weather	4°C (40°F)	24 mm (0.9 inches)	79%	moderate
December Weather	0°C (33°F)	18 mm (0.7 inches)	85%	moderate