Whanganui Weather in December
December in Whanganui brings pleasant temperatures, with highs of 20°C (68°F) and nights dropping to 13°C (55°F). Rainfall is on the higher side this month, averaging around 109 mm (4.3 in), so keep a rain jacket handy.
Rainfall in Whanganui in December
Typically, about 12 days will experience rainfall, with an average of 109 mm (4.3 in) for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.
Temperature in Whanganui in December
December in Whanganui brings pleasant temperatures, with highs of 20°C (68°F) and nights around 13°C (55°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 13°C (55°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Whanganui in December
The area enjoys a balanced 178 hours of sunlight, ensuring it's neither too overcast nor too sunny.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February and March typically offer the best weather for Whanganui.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit New Zealand, check out our Whanganui's climate page.
Whanganui Temperature in December
Min Temperature
13°C (55°F)
Max Temperature
20°C (68°F)
Chance of Rain
41%
Precipitation
109 mm (4.3 in)
Rainy days
12 days
Humidity
76% *
Sunshine
178 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Whanganui typically stay consistent throughout December, with daily highs averaging around 20°C (68°F). Nights are cool, with lows around 11°C (52°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Whanganui in December
Browse day-by-day weather records for Whanganui spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Whanganui historical weather extremes in December
Based on weather observations in Whanganui between 1992 and 2025, these are the recorded extremes during December.
- Whanganui recorded its highest December temperature of 27°C (81°F) on December 3, 1995.
- The coldest December day was on December 5, 2004, with a maximum of 9°C (48°F).
- The coldest night in December in Whanganui was on December 20, 2004, with a minimum of 2°C (36°F).
- The heaviest December precipitation occurred on December 14, 2021, when 45 mm (1.8 in) of precipitation fell.
Best Places in New Zealand in December
Find out more about the weather in New Zealand and which places have the best travel conditions in this month. See all of New Zealand in December →
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What to Wear in Whanganui in December
For Whanganui in December, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Whanganui in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit New Zealand, check out our Whanganui's climate page.
Temperature Rainfall Sunshine Humidity
See the full Whanganui climate overview or explore weather in New Zealand.
