Ballajura weather in December
In December, Ballajura sees average daytime highs of 30°C and overnight lows near 17°C, with 11 mm of rain across 1.9 wet days and about 14 hours of daylight. It is the 3rd-warmest and 12th-wettest month of the year here.
Highs climb over the month, from about 28°C in the first days to 31°C by the end. The sky is clear or mostly clear about 70% of the time in December, and the air most often feels dry.
Daylight stretches from about 13 h 54 min at the start of December to 14 h 06 min by month's end. Set against the rest of the year, December is Ballajura's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Ballajura's year-round climate.
- Daytime high
- 30°
- 3rd warmest
- Overnight low
- 17°
- 9th coldest
- Rainfall
- 11 mm
- 1.9 wet days
- Daylight
- 14 h 06 min
- 5:10 AM – 7:15 PM
- Cloud cover
- 27%
- 3rd clearest
- Wind
- 16 km/h
- 2nd windiest
- Solar energy
- 8.37 kWh/m²
- Travel score
- 6.8
- out of 10
Ballajura is suburb of Perth, Western Australia.
- Density
- 2,074/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Highs climb over the month, from about 28°C in the first days to 31°C by the end.
A typical December day in Ballajura reaches about 30°C in the afternoon and slips back to 17°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 36°C. Set against its neighbours, December runs about 3°C warmer than November and about 2°C cooler than January.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 |
| Avg low (°C) | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 18 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 15 |
| 2 | 27 | 15 |
| 3 | 28 | 15 |
| 4 | 28 | 15 |
| 5 | 28 | 15 |
| 6 | 28 | 15 |
| 7 | 28 | 16 |
| 8 | 28 | 16 |
| 9 | 29 | 16 |
| 10 | 29 | 16 |
| 11 | 29 | 16 |
| 12 | 29 | 16 |
| 13 | 29 | 16 |
| 14 | 29 | 16 |
| 15 | 29 | 17 |
| 16 | 30 | 17 |
| 17 | 30 | 17 |
| 18 | 30 | 17 |
| 19 | 30 | 17 |
| 20 | 30 | 17 |
| 21 | 30 | 17 |
| 22 | 30 | 17 |
| 23 | 31 | 17 |
| 24 | 31 | 17 |
| 25 | 31 | 17 |
| 26 | 31 | 18 |
| 27 | 31 | 18 |
| 28 | 31 | 18 |
| 29 | 31 | 18 |
| 30 | 31 | 18 |
| 31 | 31 | 18 |
Ballajura weather by month
How December compares with the rest of the year at a glance. December is the 3rd-warmest and 12th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 32° / 18° | 20 | 2.3 | 13.8 | 5.4 |
| Feb | 32° / 19° | 17 | 1.8 | 13.2 | 5.4 |
| Mar | 29° / 17° | 19 | 2.8 | 12.2 | 6.7 |
| Apr | 25° / 15° | 24 | 3.9 | 11.2 | 8.0 |
| May | 21° / 11° | 54 | 6.9 | 10.4 | 7.2 |
| Jun | 18° / 9° | 73 | 9.4 | 10 | 6.2 |
| Jul | 17° / 9° | 83 | 10.9 | 10.1 | 5.6 |
| Aug | 18° / 9° | 73 | 10.2 | 10.8 | 5.9 |
| Sep | 19° / 9° | 49 | 8 | 11.8 | 6.6 |
| Oct | 23° / 11° | 26 | 4.6 | 12.8 | 7.9 |
| Nov | 26° / 14° | 19 | 3.7 | 13.6 | 8.0 |
| Dec | 30° / 17° | 11 | 1.9 | 14 | 6.8 |
Cloud cover in December
The sky is clear or mostly clear about 70% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 12% of December, with mostly cloudy or overcast conditions the remaining 18%. Skies tend to open up as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 79 | 79 | 79 | 80 | 80 | 80 | 81 | 81 | 81 | 82 | 82 | 82 | 82 | 82 | 82 | 82 | 82 | 82 | 83 | 83 | 83 | 84 | 84 | 84 | 84 | 84 | 84 | 85 | 85 | 85 | 86 |
| Cloudier (%) | 21 | 21 | 21 | 20 | 20 | 20 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 14 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 79 | 21 |
| 2 | 79 | 21 |
| 3 | 79 | 21 |
| 4 | 80 | 20 |
| 5 | 80 | 20 |
| 6 | 80 | 20 |
| 7 | 81 | 19 |
| 8 | 81 | 19 |
| 9 | 81 | 19 |
| 10 | 82 | 18 |
| 11 | 82 | 18 |
| 12 | 82 | 18 |
| 13 | 82 | 18 |
| 14 | 82 | 18 |
| 15 | 82 | 18 |
| 16 | 82 | 18 |
| 17 | 82 | 18 |
| 18 | 82 | 18 |
| 19 | 83 | 17 |
| 20 | 83 | 17 |
| 21 | 83 | 17 |
| 22 | 84 | 16 |
| 23 | 84 | 16 |
| 24 | 84 | 16 |
| 25 | 84 | 16 |
| 26 | 84 | 16 |
| 27 | 84 | 16 |
| 28 | 85 | 15 |
| 29 | 85 | 15 |
| 30 | 85 | 15 |
| 31 | 86 | 14 |
Chance of precipitation in December
Ballajura gets around 11 mm of rain over 1.9 wet days in December, the driest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 7% and peaks near 8% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 |
| Rain chance (%) | |
|---|---|
| 1 | 8 |
| 2 | 8 |
| 3 | 8 |
| 4 | 8 |
| 5 | 8 |
| 6 | 8 |
| 7 | 8 |
| 8 | 7 |
| 9 | 7 |
| 10 | 7 |
| 11 | 7 |
| 12 | 7 |
| 13 | 7 |
| 14 | 7 |
| 15 | 7 |
| 16 | 7 |
| 17 | 7 |
| 18 | 7 |
| 19 | 6 |
| 20 | 6 |
| 21 | 6 |
| 22 | 6 |
| 23 | 5 |
| 24 | 5 |
| 25 | 5 |
| 26 | 5 |
| 27 | 5 |
| 28 | 5 |
| 29 | 5 |
| 30 | 5 |
| 31 | 5 |
Humidity in December
Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the dry band about 69% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 77 | 77 | 78 | 77 | 77 | 77 | 75 | 75 | 74 | 72 | 71 | 70 | 70 | 69 | 68 | 66 | 66 | 65 | 64 | 64 | 63 | 64 | 64 | 64 | 64 | 64 | 63 | 63 | 63 | 63 | 62 |
| Comfortable (%) | 19 | 19 | 18 | 18 | 18 | 18 | 19 | 19 | 20 | 21 | 22 | 23 | 23 | 24 | 25 | 26 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 |
| Humid (%) | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 |
| Muggy (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 77 | 19 | 4 | 0 |
| 2 | 77 | 19 | 4 | 0 |
| 3 | 78 | 18 | 4 | 0 |
| 4 | 77 | 18 | 5 | 0 |
| 5 | 77 | 18 | 5 | 0 |
| 6 | 77 | 18 | 5 | 0 |
| 7 | 75 | 19 | 6 | 0 |
| 8 | 75 | 19 | 6 | 0 |
| 9 | 74 | 20 | 6 | 0 |
| 10 | 72 | 21 | 7 | 0 |
| 11 | 71 | 22 | 7 | 0 |
| 12 | 70 | 23 | 7 | 0 |
| 13 | 70 | 23 | 7 | 0 |
| 14 | 69 | 24 | 7 | 0 |
| 15 | 68 | 25 | 7 | 0 |
| 16 | 66 | 26 | 8 | 0 |
| 17 | 66 | 26 | 8 | 0 |
| 18 | 65 | 27 | 8 | 0 |
| 19 | 64 | 27 | 8 | 1 |
| 20 | 64 | 27 | 8 | 1 |
| 21 | 63 | 28 | 8 | 1 |
| 22 | 64 | 28 | 7 | 1 |
| 23 | 64 | 28 | 7 | 1 |
| 24 | 64 | 28 | 7 | 1 |
| 25 | 64 | 28 | 7 | 1 |
| 26 | 64 | 28 | 7 | 1 |
| 27 | 63 | 28 | 7 | 2 |
| 28 | 63 | 27 | 8 | 2 |
| 29 | 63 | 27 | 8 | 2 |
| 30 | 63 | 27 | 8 | 2 |
| 31 | 62 | 27 | 8 | 3 |
Wind in December
Winds average 16 km/h in December.
Across December, daily wind ranges from about 16 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 16 | light breeze |
| 2 | 16 | light breeze |
| 3 | 16 | light breeze |
| 4 | 16 | light breeze |
| 5 | 16 | light breeze |
| 6 | 16 | light breeze |
| 7 | 16 | light breeze |
| 8 | 16 | light breeze |
| 9 | 16 | light breeze |
| 10 | 16 | light breeze |
| 11 | 16 | light breeze |
| 12 | 16 | light breeze |
| 13 | 16 | light breeze |
| 14 | 16 | light breeze |
| 15 | 16 | light breeze |
| 16 | 16 | light breeze |
| 17 | 16 | light breeze |
| 18 | 16 | light breeze |
| 19 | 16 | light breeze |
| 20 | 16 | light breeze |
| 21 | 16 | light breeze |
| 22 | 16 | light breeze |
| 23 | 16 | light breeze |
| 24 | 16 | light breeze |
| 25 | 16 | light breeze |
| 26 | 16 | light breeze |
| 27 | 16 | light breeze |
| 28 | 16 | light breeze |
| 29 | 16 | light breeze |
| 30 | 16 | light breeze |
| 31 | 16 | light breeze |
Sunrise & sunset in December
Daylight runs from about 13 h 54 min at the start of December to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 12 minutes over December. Sunrise moves from 5:08 AM to 5:18 AM, and sunset from 7:04 PM to 7:21 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.9 | 13.9 | 14.0 | 14.0 | 14.0 | 14.0 | 14.0 | 14.0 | 14.0 | 14.0 | 14.0 | 14.0 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 |
| Sunrise (AM) | 5:08 | 5:08 | 5:08 | 5:08 | 5:08 | 5:08 | 5:08 | 5:09 | 5:09 | 5:09 | 5:09 | 5:09 | 5:10 | 5:10 | 5:10 | 5:10 | 5:11 | 5:11 | 5:12 | 5:12 | 5:12 | 5:13 | 5:13 | 5:14 | 5:14 | 5:15 | 5:16 | 5:16 | 5:17 | 5:17 | 5:18 |
| Sunset (PM) | 7:04 | 7:05 | 7:06 | 7:06 | 7:07 | 7:08 | 7:09 | 7:09 | 7:10 | 7:11 | 7:12 | 7:12 | 7:13 | 7:13 | 7:14 | 7:15 | 7:15 | 7:16 | 7:16 | 7:17 | 7:17 | 7:18 | 7:18 | 7:19 | 7:19 | 7:20 | 7:20 | 7:20 | 7:21 | 7:21 | 7:21 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.9 | 5:08 | 7:04 |
| 2 | 13.9 | 5:08 | 7:05 |
| 3 | 14.0 | 5:08 | 7:06 |
| 4 | 14.0 | 5:08 | 7:06 |
| 5 | 14.0 | 5:08 | 7:07 |
| 6 | 14.0 | 5:08 | 7:08 |
| 7 | 14.0 | 5:08 | 7:09 |
| 8 | 14.0 | 5:09 | 7:09 |
| 9 | 14.0 | 5:09 | 7:10 |
| 10 | 14.0 | 5:09 | 7:11 |
| 11 | 14.0 | 5:09 | 7:12 |
| 12 | 14.0 | 5:09 | 7:12 |
| 13 | 14.1 | 5:10 | 7:13 |
| 14 | 14.1 | 5:10 | 7:13 |
| 15 | 14.1 | 5:10 | 7:14 |
| 16 | 14.1 | 5:10 | 7:15 |
| 17 | 14.1 | 5:11 | 7:15 |
| 18 | 14.1 | 5:11 | 7:16 |
| 19 | 14.1 | 5:12 | 7:16 |
| 20 | 14.1 | 5:12 | 7:17 |
| 21 | 14.1 | 5:12 | 7:17 |
| 22 | 14.1 | 5:13 | 7:18 |
| 23 | 14.1 | 5:13 | 7:18 |
| 24 | 14.1 | 5:14 | 7:19 |
| 25 | 14.1 | 5:14 | 7:19 |
| 26 | 14.1 | 5:15 | 7:20 |
| 27 | 14.1 | 5:16 | 7:20 |
| 28 | 14.1 | 5:16 | 7:20 |
| 29 | 14.1 | 5:17 | 7:21 |
| 30 | 14.1 | 5:17 | 7:21 |
| 31 | 14.1 | 5:18 | 7:21 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 8.37 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 2.6 kWh/m² to a high of 8.37 kWh/m² in December across the year — December's 8.37 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 8.1 | 8.1 | 8.1 | 8.2 | 8.2 | 8.2 | 8.2 | 8.2 | 8.2 | 8.2 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.3 | 8.4 | 8.4 | 8.4 | 8.5 | 8.5 | 8.5 | 8.6 | 8.6 | 8.6 | 8.6 | 8.7 | 8.7 | 8.7 | 8.7 | 8.7 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 8.1 | Intense |
| 2 | 8.1 | Intense |
| 3 | 8.1 | Intense |
| 4 | 8.2 | Intense |
| 5 | 8.2 | Intense |
| 6 | 8.2 | Intense |
| 7 | 8.2 | Intense |
| 8 | 8.2 | Intense |
| 9 | 8.2 | Intense |
| 10 | 8.2 | Intense |
| 11 | 8.3 | Intense |
| 12 | 8.3 | Intense |
| 13 | 8.3 | Intense |
| 14 | 8.3 | Intense |
| 15 | 8.3 | Intense |
| 16 | 8.3 | Intense |
| 17 | 8.4 | Intense |
| 18 | 8.4 | Intense |
| 19 | 8.4 | Intense |
| 20 | 8.5 | Intense |
| 21 | 8.5 | Intense |
| 22 | 8.5 | Intense |
| 23 | 8.6 | Intense |
| 24 | 8.6 | Intense |
| 25 | 8.6 | Intense |
| 26 | 8.6 | Intense |
| 27 | 8.7 | Intense |
| 28 | 8.7 | Intense |
| 29 | 8.7 | Intense |
| 30 | 8.7 | Intense |
| 31 | 8.7 | Intense |
Hazard calendar for Ballajura
In December, Ballajura sits inside its cyclone season. The full year is below, with each hazard's peak months called out.
Ballajura sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Is December a good time to visit Ballajura?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a reasonable time to visit Ballajura for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Ballajura in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Ballajura sees daytime highs around 30°C and nights near 17°C. Pack light clothes and sun protection.
Sea temperature near Ballajura in December
The nearest coast averages about 21°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 26 km away) is warmest in February at about 22°C and coldest in September near 19°C.
It's comfortable for a long swim from Nov 22 to Jul 12 — about 7.7 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 22 | 22 | 22 | 22 | 22 | 21 | 20 | 19 | 19 | 19 | 20 | 21 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool | Cool | Cool | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 22 | Refreshing |
| Feb | 22 | Refreshing |
| Mar | 22 | Refreshing |
| Apr | 22 | Refreshing |
| May | 22 | Refreshing |
| Jun | 21 | Refreshing |
| Jul | 20 | Cool |
| Aug | 19 | Cool |
| Sep | 19 | Cool |
| Oct | 19 | Cool |
| Nov | 20 | Cool |
| Dec | 21 | Refreshing |
UV index in Ballajura in December
Clear-sky midday UV in December peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Ballajura peaks around December 23 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 13 | 12 | 11 | 6 | 4 | 3 | 3 | 5 | 8 | 9 | 10 | 13 |
| Level | Extreme | Extreme | Extreme | High | Moderate | Moderate | Moderate | Moderate | Very high | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 13 | Extreme |
| Feb | 12 | Extreme |
| Mar | 11 | Extreme |
| Apr | 6 | High |
| May | 4 | Moderate |
| Jun | 3 | Moderate |
| Jul | 3 | Moderate |
| Aug | 5 | Moderate |
| Sep | 8 | Very high |
| Oct | 9 | Very high |
| Nov | 10 | Extreme |
| Dec | 13 | Extreme |
Air quality in Ballajura in December
Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.
Air quality in Ballajura is worst in May — around 17 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (December, 4 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 6 | 5 | 4 | 11 | 17 | 5 | 5 | 6 | 11 | 11 | 6 | 4 |
| Level | Good | Good | Good | Good | Moderate | Good | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 6 | Good |
| Feb | 5 | Good |
| Mar | 4 | Good |
| Apr | 11 | Good |
| May | 17 | Moderate |
| Jun | 5 | Good |
| Jul | 5 | Good |
| Aug | 6 | Good |
| Sep | 11 | Good |
| Oct | 11 | Good |
| Nov | 6 | Good |
| Dec | 4 | Good |
Where is Ballajura?
Ballajura sits at 31.8°S, 115.9°E, 40 m above sea level, in Australia. The nearest listed city is Landsdale, 5.0 km away.
Topography around Ballajura
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ballajura.
Within 3 km, the terrain around Ballajura has only modest variations in elevation — a maximum elevation change of 70 m around an average of 42 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 232 m; within 80 km, significant variations in elevation — a maximum elevation change of 567 m.
The land around Ballajura is covered by artificial surfaces (50%) and trees (24%) within 3 km, artificial surfaces (43%), trees (24%) and grassland (20%) within 16 km, and trees (39%) and water (29%) within 80 km.
Australia travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type I
- 230 V · 50 Hz
- Prices
- ≈ 90% of US
- price level, 2025
- GDP per capita
- $65,130
- 2025
- Happiness
- 6.9 / 10
- World Happiness, 2025
- Homicide rate
- 0.9
- per 100k, 2023
- Road deaths
- 4.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Ballajura (-31.8406°, 115.8955°, elevation 40 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).