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December Weather in Masterton, New Zealand

Last updated: August 31, 2025

In Masterton, New Zealand, the average temperature in December hovers around 16°C (60°F). Expect a minimum of 5°C (41°F) and a maximum of 24°C (75°F) during this time. With 132 mm (5.2 in) of precipitation spread over 14 days, you'll want to prepare for some rain. The average humidity sits at a comfortable 75%, making the climate feel fresh and vibrant.

December Temperature in Masterton

In December in Masterton, the average temperature is 16°C (60°F). Maximum temperatures can reach 24°C (75°F), while minimums can drop to as low as 5°C (41°F). This makes it a pleasant time to visit, with mild days and cooler nights perfect for exploring.

December Weather in Masterton: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Masterton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Masterton, December typically has an average temperature of 16°C (60°F), with highs reaching up to 24°C (75°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec626260555249474850535660
Data source: Temperature data for Masterton 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.

December Precipitation in Masterton

In Masterton in December, the precipitation amount is 132 mm (5.2 in) over a span of 14 days.

December Precipitation Trends in Masterton

The chart displays monthly precipitation patterns in Masterton, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Masterton, December typically receives around 132 mm (5.2 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec53618410460102888010286103132
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Masterton

In Masterton in December humidity is 75%. With an average temperature of 16°C (60°F), this humidity feels like a warm, muggy blanket enveloping you, making outdoor activities a bit uncomfortable and requiring frequent hydration breaks while traveling.

December Average Humidity in Masterton

This chart illustrates the average monthly humidity levels in Masterton, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Masterton is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%76%76%77%82%83%84%81%80%79%78%75%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Masterton

In Masterton in December, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Masterton.

Maximum UV Index Levels in Masterton for December

The chart shows the monthly maximum UV Index (UVI) for Masterton in December, 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 December, the maximum UV index in Masterton typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1313974224691113
Data source: Masterton December 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 December Weather in Masterton Compares to Other Months

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

This table compares monthly weather conditions in Masterton, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (63°F)53 mm (2.1 inches)75%extreme
February Weather17°C (63°F)61 mm (2.4 inches)76%extreme
March Weather15°C (60°F)84 mm (3.3 inches)75%very high
April Weather13°C (56°F)104 mm (4.1 inches)77%high
May Weather11°C (52°F)60 mm (2.3 inches)82%moderate
June Weather9°C (49°F)102 mm (4.0 inches)83%low
July Weather8°C (47°F)88 mm (3.5 inches)83%low
August Weather9°C (48°F)80 mm (3.1 inches)81%moderate
September Weather10°C (50°F)102 mm (4.0 inches)80%high
October Weather11°C (53°F)86 mm (3.4 inches)79%very high
November Weather14°C (57°F)103 mm (4.0 inches)78%extreme
December Weather16°C (60°F)132 mm (5.2 inches)75%extreme

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