Warrnambool in December
December is right in the heart of summer for Warrnambool, and the weather has a definite personality this time of year.
Daytime highs average 22.2 degrees, dropping to 13.5 degrees overnight. That's a 9-degree swing between day and night. Comfortable during the day, with evenings that invite a light layer.
December is 4.2 degrees warmer than the yearly average here.
Rainfall in December averages 49mm over about 13 days. That means roughly a 43% chance of rain on any given day, pack a compact umbrella just in case.
Solar exposure averages 23.5 MJ/m2 per day in December, with UV levels in the extreme range. Sunscreen, hat, and sunnies are all essential. You can burn in under 10 minutes.
Our Comfort Score rates December at 9.3/10. That's about as good as it gets.
Packing tip: bring a mix of short and long sleeves, and serious sun protection.
Scroll down for the detailed climate data, or explore what nearby cities are like in December.
December at a Glance
Temperature Range
Daily temperature range in December. The bar shows the typical spread between overnight lows and afternoon highs.
What to Pack
- Comfortable casual wear suitable for warm days
- A waterproof jacket or compact umbrella
- Strong sun protection including a hat and SPF 50+
Coming From Overseas?
How December in Warrnambool stacks up against major cities around the world.
About 14 degrees warmer and considerably drier.
About 16 degrees warmer and considerably drier.
About 10 degrees warmer and considerably drier.
How December Compares
Warrnambool's monthly climate at a glance. December is highlighted.
| Month | Max | Min | Rain | Comfort |
|---|---|---|---|---|
| Jan | 21.6 | 14.7 | 58mm | 8.7 |
| Feb | 21.8 | 13.8 | 10mm | 9.8 |
| Mar | 21.9 | 13.8 | 15mm | 9.2 |
| Apr | 16.7 | 11.3 | 63mm | 3.6 |
| May | 15.9 | 9.4 | 29mm | 3.5 |
| Jun | 13.1 | 7.3 | 37mm | 1.5 |
| Jul | 13.1 | 7.2 | 98mm | 1.0 |
| Aug | 16.5 | 9.2 | 77mm | 3.7 |
| Sep | 14.9 | 9.8 | 84mm | 2.4 |
| Oct | 17.8 | 10.3 | 71mm | 5.5 |
| Nov | 20.7 | 12.0 | 85mm | 7.9 |
| Dec | 22.2 | 13.5 | 49mm | 9.3 |