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New Zealand weather

Weather in Greymouth for December 2025

Your guide to Greymouth weather in December - trends and predictions

    Temperatures

  • Until now, December 2025 in Greymouth has been nearly identical to the historical average, with a temperature of 16.3 °C (showing only a slight deviation of -0.2 °C).

  • The forecast for the next days in Greymouth predicts temperatures to be around 17 °C, close to the historical average.

  • In general, the average temperature in Greymouth at the beginning of December is 16.6 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 19.3 °C by the end of December.

    • Rain 🌧️

  • Greymouth experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 342 mm.

Average dry days
8
Dry days
Average rainy days
23
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/12°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Greymouth Weather December

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

Temperatures trend during December in Greymouth

See the weather trend as well as the moving average line

December weather in Greymouth day by day

Click on a date for more information
November January
Date Weather Temperatures Rain UV More
1 Dec. Sunny
Sunny
 16° /9° 3.5 mm 7
2 Dec. Overcast
Overcast
 16° /9° 6.5 mm 7
3 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 17° /11° 14.2 mm 7
4 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 16° /11° 7.6 mm 7
5 Dec. Patchy rain possible
Patchy rain possible
 17° /12° 10.8 mm 7
6 Dec. Patchy rain possible
Patchy rain possible
 17° /13° 5.3 mm 7
7 Dec. Moderate rain at times
Moderate rain at times
 17° /14° 4.2 mm 7
8 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 16° /11° 46.2 mm 7
9 Dec. Patchy rain possible
Patchy rain possible
 16° /10° 5.8 mm 8
10 Dec. Moderate rain at times
Moderate rain at times
 17° /9° 0.9 mm 8
11 Dec. Moderate rain at times
Moderate rain at times
 16° /10° 2.1 mm 7
12 Dec. Moderate rain at times
Moderate rain at times
 17° /10° 1.2 mm 7
13 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 17° /11° 7.1 mm 7
14 Dec. Partly cloudy
Partly cloudy
 19° /11° 0 mm 2.8
15 Dec. Patchy rain possible
Patchy rain possible
 20° /11° 4.1 mm 3.2
16 Dec. Heavy rain
Heavy rain
 16° /12° 56.1 mm 1.1
17 Dec. Patchy rain possible
Patchy rain possible
 18° /10° 1.1 mm 2.2
18 Dec. Patchy rain possible
Patchy rain possible
 13° /10° 1.4 mm 0
19 Dec. Patchy rain possible
Patchy rain possible
 17° /9° 0.5 mm 6
20 Dec. Moderate rain
Moderate rain
 13° /10° 5.1 mm 6
21 Dec. Patchy rain possible
Patchy rain possible
 16° /9° 1.5 mm 6
22 Dec. Patchy rain possible
Patchy rain possible
 16° /12° 1 mm 6
23 Dec. Patchy rain possible
Patchy rain possible
 15° /12° 2.3 mm 6
24 Dec. Moderate rain
Moderate rain
 17° /12° 11.5 mm 7
25 Dec. Sunny
Sunny
 18° /11° 0 mm 7
26 Dec. Sunny
Sunny
 20° /13° 0 mm 8
27 Dec. Sunny
Sunny
 22° /12° 0 mm 9
28 Dec. Overcast
Overcast
 19° /13° 0 mm 7
29 Dec. Moderate or heavy rain shower
Moderate or heavy rain shower
 19° /13° 21.1 mm 7
30 Dec. Moderate rain at times
Moderate rain at times
 18° /13° 4.7 mm 7
31 Dec. Sunny
Sunny
 19° /11° 0 mm 8
Next
Important Notice
Our weather forecast for Greymouth 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 Greymouth forecast closer to your planned date for the most up-to-date weather information.
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Greymouth in December - FAQ

What are the expected maximum and minimum temperatures in Greymouth during December?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Greymouth during December?
Significant rainfall exceeding 342 mm is expected in Greymouth during December, occurring over more than 23 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Greymouth during December?
The average wind speed in Greymouth during December is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

December rainfall patterns in Greymouth

Explore the daily rainfall trends and prepare for Greymouths December weather 💧
Typically, Greymouth has 23 rainy days in December with a total of 342 mm of rainfall.

UV exposure in Greymouth during December

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

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Get accurate weather forecasts for Greymouth, located at latitude -42.467 and longitude 171.2. Stay updated with localized weather information tailored for Greymouth.

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