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January Weather in New Plymouth, United States

Last updated: June 24, 2025

In January, the average temperature in New Plymouth, United States hovers around 0°C (33°F). Expect extremes with a minimum of -26°C (-14°F) and a maximum of 14°C (57°F). During this time, precipitation totals roughly 48 mm (1.9 in) across 10 days, while the average humidity lingers at a damp 88%.

January Temperature in New Plymouth

In January in New Plymouth, the average temperature is 0°C (33°F), with maximums reaching up to 14°C (57°F) and minimums dropping as low as -26°C (-14°F). Be sure to dress in layers and prepare for potentially cold weather if you're planning a trip during this time.

January Weather in New Plymouth: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in New Plymouth, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In New Plymouth, January typically has an average temperature of 0°C (33°F), with highs reaching up to 14°C (57°F) and lows dropping to around -26°C (-14°F).
JanFebMarAprMayJunJulAugSepOctNovDec323546536272828069534234
Data source: Temperature data for New Plymouth generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in New Plymouth

In New Plymouth in January, the precipitation amount is 48 mm (1.9 in) spread over a period of 10 days.

January Precipitation Trends in New Plymouth

The chart displays monthly precipitation patterns in New Plymouth, 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 New Plymouth, January typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec4855413134191813203537
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in New Plymouth

In New Plymouth in January, humidity is 88%. With an average temperature of 0°C (33°F), this humidity feels like a damp chill that seeps into your bones, making travel uncomfortable and requiring extra layers to stay warm and dry.

January Average Humidity in New Plymouth

This chart illustrates the average monthly humidity levels in New Plymouth, 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 New Plymouth is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%89%85%79%71%71%66%50%48%65%84%87%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in New Plymouth

In New Plymouth 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 New Plymouth, you can check the information here.

Maximum UV Index Levels in New Plymouth for January

The chart shows the monthly maximum UV Index (UVI) for New Plymouth 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 New Plymouth typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec346710111098542
Data source: New Plymouth 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 New Plymouth Compares to Other Months

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

This table compares monthly weather conditions in New Plymouth, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (33°F)48 mm (1.9 inches)88%moderate
February Weather2°C (36°F)55 mm (2.2 inches)89%moderate
March Weather8°C (46°F)41 mm (1.6 inches)85%high
April Weather11°C (53°F)31 mm (1.2 inches)79%high
May Weather17°C (62°F)34 mm (1.3 inches)71%very high
June Weather22°C (72°F)19 mm (0.8 inches)71%extreme
July Weather28°C (83°F)1 mm (0.0 inches)66%very high
August Weather27°C (80°F)8 mm (0.3 inches)50%very high
September Weather20°C (69°F)12 mm (0.5 inches)48%very high
October Weather12°C (53°F)20 mm (0.8 inches)65%moderate
November Weather6°C (42°F)35 mm (1.4 inches)84%moderate
December Weather1°C (34°F)37 mm (1.5 inches)87%low

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