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Weather in Whanganui for December 2025

Your guide to Whanganui weather in December - trends and predictions

    Temperatures

  • In general, the average temperature in Whanganui at the beginning of December is 18.6 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 20.9 °C by the end of December.

    • Rain 🌧️

  • Whanganui experiences moderate rainfall in December, with an average of 10 rainy days and a total precipitation of 137 mm.

Average dry days
21
Dry days
Average rainy days
10
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/11°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Whanganui Weather December

Move between months or click on a day
November
January
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Overcast
19°
2
Overcast
19°
3
Light rain
18°
4
Light rain shower
19°
5
Light rain shower
17°
6
Patchy rain possible
19°
7
Patchy rain possible
19°
8
Sunny
20°
9
Sunny
19°
10
Light drizzle
19°
11
Overcast
18°
12
Patchy rain possible
16°
13
Patchy rain possible
18°
14
Patchy rain possible
19°
15
Partly cloudy
20°
16
Patchy rain possible
20°
17
Overcast
19°
18
Patchy rain possible
19°
19
Cloudy
19°
20
Sunny
19°
21
Sunny
23°
22
Moderate or heavy rain shower
20°
23
Moderate or heavy rain shower
22°
24
Patchy rain possible
21°
25
Patchy rain possible
21°
26
Patchy rain possible
20°
27
Patchy rain possible
20°
28
Sunny
22°
29
Sunny
23°
30
Overcast
21°
31
Sunny
19°

Temperatures trend during December in Whanganui

See the weather trend as well as the moving average line

December weather in Whanganui day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
1 Dec. Overcast
Overcast
 19° /11° 0.1 mm 6
2 Dec. Overcast
Overcast
 19° /11° 0.2 mm 6
3 Dec. Light rain
Light rain
 18° /13° 3.7 mm 6
4 Dec. Light rain shower
Light rain shower
 19° /13° 1.5 mm 6
5 Dec. Light rain shower
Light rain shower
 17° /13° 1 mm 5
6 Dec. Patchy rain possible
Patchy rain possible
 19° /12° 0.3 mm 6
7 Dec. Patchy rain possible
Patchy rain possible
 19° /11° 0.1 mm 6
8 Dec. Sunny
Sunny
 20° /10° 0.9 mm 7
9 Dec. Sunny
Sunny
 19° /11° 1.8 mm 6
10 Dec. Light drizzle
Light drizzle
 19° /12° 0.6 mm 6
11 Dec. Overcast
Overcast
 18° /9° 0 mm 6
12 Dec. Patchy rain possible
Patchy rain possible
 16° /11° 2.8 mm 6
13 Dec. Patchy rain possible
Patchy rain possible
 18° /10° 0.4 mm 7
14 Dec. Patchy rain possible
Patchy rain possible
 19° /12° 0.1 mm 7
15 Dec. Partly cloudy
Partly cloudy
 20° /11° 0 mm 7
16 Dec. Patchy rain possible
Patchy rain possible
 20° /12° 4.5 mm 7
17 Dec. Overcast
Overcast
 19° /12° 0.2 mm 6
18 Dec. Patchy rain possible
Patchy rain possible
 19° /11° 0.3 mm 7
19 Dec. Cloudy
Cloudy
 19° /12° 0.5 mm 6
20 Dec. Sunny
Sunny
 19° /12° 1 mm 7
21 Dec. Sunny
Sunny
 23° /13° 1.5 mm 7
22 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 20° /13° 5.3 mm 6
23 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 22° /14° 7.1 mm 6
24 Dec. Patchy rain possible
Patchy rain possible
 21° /14° 2.1 mm 6
25 Dec. Patchy rain possible
Patchy rain possible
 21° /13° 1.6 mm 6
26 Dec. Patchy rain possible
Patchy rain possible
 20° /14° 2.5 mm 6
27 Dec. Patchy rain possible
Patchy rain possible
 20° /13° 0.9 mm 6
28 Dec. Sunny
Sunny
 22° /11° 0.1 mm 6
29 Dec. Sunny
Sunny
 23° /12° 0.7 mm 6
30 Dec. Overcast
Overcast
 21° /14° 3.8 mm 6
31 Dec. Sunny
Sunny
 19° /13° 7.4 mm 6
Next
Important Notice
Our weather forecast for Whanganui in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Whanganui forecast closer to your planned date for the most up-to-date weather information.
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Whanganui in December - FAQ

What are the expected maximum and minimum temperatures in Whanganui during December?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Whanganui during December?
Significant rainfall exceeding 137 mm is expected in Whanganui during December, occurring over more than 10 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Whanganui during December?
The average wind speed in Whanganui during December is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in Whanganui

Explore the daily rainfall trends and prepare for Whanganuis December weather 💧

UV exposure in Whanganui during December

Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️

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Location coordinates Where is Whanganui?

Get accurate weather forecasts for Whanganui, located at latitude -39.933 and longitude 175.05. Stay updated with localized weather information tailored for Whanganui.

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