Willetton weather in December
In December, Willetton sees average daytime highs of 29°C and overnight lows near 16°C, with 11 mm of rain across 1.9 wet days and about 14.1 hours of daylight. It is the 3rd-warmest and 12th-wettest month of the year here.
Highs climb over the month, from about 27°C in the first days to 31°C by the end. The sky is clear or mostly clear about 69% 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 Willetton's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Willetton's year-round climate.
- Daytime high
- 29°
- 3rd warmest
- Overnight low
- 16°
- 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
- 8.36 kWh/m²
- Travel score
- 7.1
- out of 10
Willetton is suburb of Perth, Western Australia.
- Density
- 2,214/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 27°C in the first days to 31°C by the end.
A typical December day in Willetton reaches about 29°C in the afternoon and slips back to 16°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 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 |
| Avg low (°C) | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 15 |
| 2 | 27 | 15 |
| 3 | 27 | 15 |
| 4 | 27 | 15 |
| 5 | 27 | 15 |
| 6 | 27 | 15 |
| 7 | 28 | 15 |
| 8 | 28 | 15 |
| 9 | 28 | 16 |
| 10 | 28 | 16 |
| 11 | 28 | 16 |
| 12 | 28 | 16 |
| 13 | 29 | 16 |
| 14 | 29 | 16 |
| 15 | 29 | 16 |
| 16 | 29 | 16 |
| 17 | 29 | 16 |
| 18 | 29 | 17 |
| 19 | 30 | 17 |
| 20 | 30 | 17 |
| 21 | 30 | 17 |
| 22 | 30 | 17 |
| 23 | 30 | 17 |
| 24 | 30 | 17 |
| 25 | 30 | 17 |
| 26 | 30 | 17 |
| 27 | 30 | 17 |
| 28 | 31 | 17 |
| 29 | 31 | 18 |
| 30 | 31 | 18 |
| 31 | 31 | 18 |
Willetton 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 | 31° / 18° | 19 | 2.1 | 13.9 | 5.7 |
| Feb | 31° / 19° | 17 | 1.7 | 13.2 | 5.7 |
| Mar | 29° / 17° | 18 | 2.7 | 12.2 | 7.0 |
| Apr | 25° / 14° | 26 | 4 | 11.2 | 8.0 |
| May | 21° / 11° | 62 | 7 | 10.4 | 7.1 |
| Jun | 18° / 9° | 87 | 10 | 9.9 | 6.0 |
| Jul | 17° / 9° | 96 | 11.6 | 10.1 | 5.3 |
| Aug | 17° / 9° | 87 | 10.7 | 10.8 | 5.7 |
| Sep | 19° / 9° | 60 | 8.7 | 11.8 | 6.4 |
| Oct | 22° / 11° | 29 | 5 | 12.8 | 7.8 |
| Nov | 26° / 14° | 22 | 4 | 13.6 | 8.1 |
| Dec | 29° / 16° | 11 | 1.9 | 14.1 | 7.1 |
Cloud cover in December
The sky is clear or mostly clear about 69% 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 19%. 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 (%) | 77 | 77 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 80 | 80 | 80 | 80 | 81 | 81 | 81 | 81 | 83 | 83 | 83 | 84 | 84 | 84 | 85 | 85 | 85 | 86 | 85 |
| Cloudier (%) | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 17 | 17 | 17 | 16 | 16 | 16 | 15 | 15 | 15 | 14 | 15 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 77 | 23 |
| 2 | 77 | 23 |
| 3 | 78 | 22 |
| 4 | 78 | 22 |
| 5 | 78 | 22 |
| 6 | 78 | 22 |
| 7 | 78 | 22 |
| 8 | 78 | 22 |
| 9 | 78 | 22 |
| 10 | 78 | 22 |
| 11 | 78 | 22 |
| 12 | 78 | 22 |
| 13 | 80 | 20 |
| 14 | 80 | 20 |
| 15 | 80 | 20 |
| 16 | 80 | 20 |
| 17 | 81 | 19 |
| 18 | 81 | 19 |
| 19 | 81 | 19 |
| 20 | 81 | 19 |
| 21 | 83 | 17 |
| 22 | 83 | 17 |
| 23 | 83 | 17 |
| 24 | 84 | 16 |
| 25 | 84 | 16 |
| 26 | 84 | 16 |
| 27 | 85 | 15 |
| 28 | 85 | 15 |
| 29 | 85 | 15 |
| 30 | 86 | 14 |
| 31 | 85 | 15 |
Chance of precipitation in December
Willetton 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 10% 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 (%) | 10 | 10 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 |
| Rain chance (%) | |
|---|---|
| 1 | 10 |
| 2 | 10 |
| 3 | 9 |
| 4 | 9 |
| 5 | 9 |
| 6 | 9 |
| 7 | 8 |
| 8 | 8 |
| 9 | 8 |
| 10 | 8 |
| 11 | 8 |
| 12 | 8 |
| 13 | 7 |
| 14 | 7 |
| 15 | 7 |
| 16 | 7 |
| 17 | 7 |
| 18 | 6 |
| 19 | 6 |
| 20 | 6 |
| 21 | 6 |
| 22 | 5 |
| 23 | 5 |
| 24 | 5 |
| 25 | 5 |
| 26 | 5 |
| 27 | 4 |
| 28 | 4 |
| 29 | 4 |
| 30 | 4 |
| 31 | 4 |
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 (%) | 78 | 78 | 78 | 78 | 78 | 77 | 76 | 75 | 75 | 73 | 72 | 71 | 70 | 68 | 68 | 67 | 66 | 66 | 65 | 65 | 64 | 64 | 64 | 64 | 64 | 65 | 65 | 64 | 64 | 64 | 63 |
| Comfortable (%) | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 20 | 20 | 21 | 22 | 23 | 24 | 25 | 25 | 26 | 26 | 26 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 26 | 27 |
| Humid (%) | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 |
| Muggy (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 78 | 18 | 4 | 0 |
| 2 | 78 | 18 | 4 | 0 |
| 3 | 78 | 18 | 4 | 0 |
| 4 | 78 | 18 | 4 | 0 |
| 5 | 78 | 18 | 4 | 0 |
| 6 | 77 | 19 | 4 | 0 |
| 7 | 76 | 19 | 5 | 0 |
| 8 | 75 | 20 | 5 | 0 |
| 9 | 75 | 20 | 5 | 0 |
| 10 | 73 | 21 | 6 | 0 |
| 11 | 72 | 22 | 6 | 0 |
| 12 | 71 | 23 | 6 | 0 |
| 13 | 70 | 24 | 6 | 0 |
| 14 | 68 | 25 | 7 | 0 |
| 15 | 68 | 25 | 7 | 0 |
| 16 | 67 | 26 | 7 | 0 |
| 17 | 66 | 26 | 7 | 1 |
| 18 | 66 | 26 | 7 | 1 |
| 19 | 65 | 27 | 7 | 1 |
| 20 | 65 | 27 | 7 | 1 |
| 21 | 64 | 28 | 7 | 1 |
| 22 | 64 | 28 | 7 | 1 |
| 23 | 64 | 28 | 7 | 1 |
| 24 | 64 | 28 | 7 | 1 |
| 25 | 64 | 28 | 7 | 1 |
| 26 | 65 | 27 | 7 | 1 |
| 27 | 65 | 27 | 7 | 1 |
| 28 | 64 | 27 | 7 | 2 |
| 29 | 64 | 27 | 7 | 2 |
| 30 | 64 | 26 | 8 | 2 |
| 31 | 63 | 27 | 8 | 2 |
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 5:17 AM, and sunset from 7:05 PM to 7:22 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 | 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 | 14.1 | 14.1 |
| Sunrise (AM) | 5:08 | 5:08 | 5:08 | 5:08 | 5:08 | 5:08 | 5:08 | 5:08 | 5:08 | 5:08 | 5:09 | 5:09 | 5:09 | 5:09 | 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 |
| Sunset (PM) | 7:05 | 7:05 | 7:06 | 7:07 | 7:08 | 7:08 | 7:09 | 7:10 | 7:11 | 7:11 | 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 | 7:21 | 7:21 | 7:21 | 7:21 | 7:22 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.9 | 5:08 | 7:05 |
| 2 | 14.0 | 5:08 | 7:05 |
| 3 | 14.0 | 5:08 | 7:06 |
| 4 | 14.0 | 5:08 | 7:07 |
| 5 | 14.0 | 5:08 | 7:08 |
| 6 | 14.0 | 5:08 | 7:08 |
| 7 | 14.0 | 5:08 | 7:09 |
| 8 | 14.0 | 5:08 | 7:10 |
| 9 | 14.0 | 5:08 | 7:11 |
| 10 | 14.0 | 5:08 | 7:11 |
| 11 | 14.1 | 5:09 | 7:12 |
| 12 | 14.1 | 5:09 | 7:13 |
| 13 | 14.1 | 5:09 | 7:13 |
| 14 | 14.1 | 5:09 | 7:14 |
| 15 | 14.1 | 5:10 | 7:15 |
| 16 | 14.1 | 5:10 | 7:15 |
| 17 | 14.1 | 5:10 | 7:16 |
| 18 | 14.1 | 5:11 | 7:16 |
| 19 | 14.1 | 5:11 | 7:17 |
| 20 | 14.1 | 5:12 | 7:17 |
| 21 | 14.1 | 5:12 | 7:18 |
| 22 | 14.1 | 5:12 | 7:18 |
| 23 | 14.1 | 5:13 | 7:19 |
| 24 | 14.1 | 5:13 | 7:19 |
| 25 | 14.1 | 5:14 | 7:20 |
| 26 | 14.1 | 5:14 | 7:20 |
| 27 | 14.1 | 5:15 | 7:21 |
| 28 | 14.1 | 5:16 | 7:21 |
| 29 | 14.1 | 5:16 | 7:21 |
| 30 | 14.1 | 5:17 | 7:21 |
| 31 | 14.1 | 5:17 | 7:22 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 8.36 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 2.55 kWh/m² to a high of 8.36 kWh/m² in December across the year — December's 8.36 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 | 8.1 | 8.1 | 8.2 | 8.2 | 8.2 | 8.2 | 8.2 | 8.2 | 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 | 8.1 | Intense |
| 5 | 8.1 | Intense |
| 6 | 8.2 | Intense |
| 7 | 8.2 | Intense |
| 8 | 8.2 | Intense |
| 9 | 8.2 | Intense |
| 10 | 8.2 | Intense |
| 11 | 8.2 | 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 Willetton
In December, Willetton sits inside its cyclone season. The full year is below, with each hazard's peak months called out.
Willetton sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Willetton's rainy season runs May–September, when most of the year's rain falls.
Is December a good time to visit Willetton?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is one of the better times to visit Willetton for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Willetton in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Willetton sees daytime highs around 29°C and nights near 16°C. Pack light clothes and sun protection.
Sea temperature near Willetton 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 26 to Jul 9 — about 7.4 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 Willetton 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 Willetton 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 Willetton 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 Willetton is worst in May — around 18 µg/m³ PM2.5 (moderate), about 4.4× 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) | 8 | 7 | 5 | 10 | 18 | 8 | 6 | 7 | 15 | 15 | 10 | 4 |
| Level | Good | Good | Good | Good | Moderate | Good | Good | Good | Moderate | Moderate | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 7 | Good |
| Mar | 5 | Good |
| Apr | 10 | Good |
| May | 18 | Moderate |
| Jun | 8 | Good |
| Jul | 6 | Good |
| Aug | 7 | Good |
| Sep | 15 | Moderate |
| Oct | 15 | Moderate |
| Nov | 10 | Good |
| Dec | 4 | Good |
Where is Willetton?
Willetton sits at 32.1°S, 115.9°E, 22 m above sea level, in Australia. The nearest listed city is Canning Vale, 3.0 km away.
Topography around Willetton
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Willetton.
Within 3 km, the terrain around Willetton has only modest variations in elevation — a maximum elevation change of 46 m around an average of 19 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 311 m; within 80 km, significant variations in elevation — a maximum elevation change of 567 m.
The land around Willetton is covered by artificial surfaces (75%) within 3 km, artificial surfaces (48%) and trees (24%) within 16 km, and trees (43%) and water (31%) 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 Willetton (-32.0525°, 115.8878°, elevation 22 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).