Byron Bay weather in December
December in Byron Bay: warm, rainy, with clean air — an excellent time to visit.
#3 of 12 months in Byron Bay · #102 of 897 destinations to visit in December · comfort 87/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Byron Bay in December
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Byron Bay climate normals — December
| Daytime high | 27°C / 80°F | 🌤 warm |
|---|---|---|
| Nighttime low | 21°C / 69°F | |
| Rainfall | 110 mm / 4.3 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 18°C / 65°F | |
| Sunshine | 11.3 h/day | |
| Daylight | 13.9 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 33 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Byron Bay in December — FAQ
- Is December a good time to visit Byron Bay?
- December in Byron Bay: warm, rainy, with clean air — an excellent time to visit. It ranks #3 of 12 months for Byron Bay on SeasonMap's comfort score (87/100).
- What is the weather like in Byron Bay in December?
- In December, Byron Bay averages a daily high of 26.7°C and a low of 20.8°C, with about 110.2 mm of rain over roughly 14 rainy days.
- What is the air quality in Byron Bay in December?
- Byron Bay has a mean US Air Quality Index of about 33 in December.