Blacktown weather in December
In December, Blacktown sees average daytime highs of 27°C and overnight lows near 17°C, with 58 mm of rain across 8.7 wet days and about 14.2 hours of daylight. It is the 3rd-warmest and 6th-wettest month of the year here.
Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 33% of the time in December, and the air most often feels humid.
Daylight stretches from about 14 h 06 min at the start of December to 14 h 12 min by month's end. Set against the rest of the year, December is Blacktown's 10th-clearest and 2nd-windiest month. For the whole year in context, see Blacktown's year-round climate.
- Daytime high
- 27°
- 3rd warmest
- Overnight low
- 17°
- 10th coldest
- Rainfall
- 58 mm
- 8.7 wet days
- Daylight
- 14 h 12 min
- 5:46 AM – 7:59 PM
- Cloud cover
- 58%
- 10th clearest
- Wind
- 11 km/h
- 2nd windiest
- Solar energy
- 6.53 kWh/m²
- Travel score
- 6.7
- out of 10
Blacktown is suburb of Sydney, New South Wales, Australia.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Day-to-day highs hold fairly steady near 27°C through the month.
A typical December day in Blacktown reaches about 27°C in the afternoon and slips back to 17°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 33°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°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) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 |
| Avg low (°C) | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 26 | 16 |
| 2 | 26 | 16 |
| 3 | 26 | 16 |
| 4 | 26 | 16 |
| 5 | 26 | 16 |
| 6 | 26 | 16 |
| 7 | 26 | 17 |
| 8 | 26 | 17 |
| 9 | 26 | 17 |
| 10 | 26 | 17 |
| 11 | 26 | 17 |
| 12 | 26 | 17 |
| 13 | 26 | 17 |
| 14 | 27 | 17 |
| 15 | 27 | 17 |
| 16 | 27 | 17 |
| 17 | 27 | 17 |
| 18 | 27 | 17 |
| 19 | 27 | 17 |
| 20 | 27 | 17 |
| 21 | 27 | 17 |
| 22 | 27 | 17 |
| 23 | 27 | 17 |
| 24 | 27 | 18 |
| 25 | 27 | 18 |
| 26 | 27 | 18 |
| 27 | 27 | 18 |
| 28 | 27 | 18 |
| 29 | 27 | 18 |
| 30 | 27 | 18 |
| 31 | 28 | 18 |
Blacktown weather by month
How December compares with the rest of the year at a glance. December is the 3rd-warmest and 6th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 28° / 19° | 66 | 9.1 | 14 | 6.2 |
| Feb | 27° / 19° | 84 | 10 | 13.3 | 6.3 |
| Mar | 26° / 17° | 66 | 10.6 | 12.3 | 6.8 |
| Apr | 23° / 13° | 51 | 7.8 | 11.2 | 7.4 |
| May | 20° / 10° | 45 | 6.3 | 10.3 | 7.1 |
| Jun | 18° / 8° | 61 | 7.4 | 9.8 | 6.3 |
| Jul | 17° / 7° | 35 | 5.7 | 10 | 6.5 |
| Aug | 19° / 7° | 35 | 5.2 | 10.7 | 7.2 |
| Sep | 22° / 10° | 39 | 6.1 | 11.8 | 7.5 |
| Oct | 24° / 13° | 49 | 7.3 | 12.8 | 7.5 |
| Nov | 25° / 15° | 66 | 8.6 | 13.8 | 7.0 |
| Dec | 27° / 17° | 58 | 8.7 | 14.2 | 6.7 |
Cloud cover in December
The sky is clear or mostly clear about 33% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 52%. 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 (%) | 48 | 47 | 48 | 47 | 47 | 46 | 46 | 46 | 46 | 46 | 48 | 47 | 47 | 47 | 47 | 47 | 47 | 48 | 47 | 47 | 48 | 48 | 48 | 48 | 48 | 49 | 49 | 50 | 50 | 51 | 51 |
| Cloudier (%) | 52 | 53 | 52 | 53 | 53 | 54 | 54 | 54 | 54 | 54 | 52 | 53 | 53 | 53 | 53 | 53 | 53 | 52 | 53 | 53 | 52 | 52 | 52 | 52 | 52 | 51 | 51 | 50 | 50 | 49 | 49 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 48 | 52 |
| 2 | 47 | 53 |
| 3 | 48 | 52 |
| 4 | 47 | 53 |
| 5 | 47 | 53 |
| 6 | 46 | 54 |
| 7 | 46 | 54 |
| 8 | 46 | 54 |
| 9 | 46 | 54 |
| 10 | 46 | 54 |
| 11 | 48 | 52 |
| 12 | 47 | 53 |
| 13 | 47 | 53 |
| 14 | 47 | 53 |
| 15 | 47 | 53 |
| 16 | 47 | 53 |
| 17 | 47 | 53 |
| 18 | 48 | 52 |
| 19 | 47 | 53 |
| 20 | 47 | 53 |
| 21 | 48 | 52 |
| 22 | 48 | 52 |
| 23 | 48 | 52 |
| 24 | 48 | 52 |
| 25 | 48 | 52 |
| 26 | 49 | 51 |
| 27 | 49 | 51 |
| 28 | 50 | 50 |
| 29 | 50 | 50 |
| 30 | 51 | 49 |
| 31 | 51 | 49 |
Chance of precipitation in December
Blacktown gets around 58 mm of rain over 8.7 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 28% and peaks near 29% 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 (%) | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Rain chance (%) | |
|---|---|
| 1 | 28 |
| 2 | 28 |
| 3 | 29 |
| 4 | 29 |
| 5 | 29 |
| 6 | 29 |
| 7 | 29 |
| 8 | 28 |
| 9 | 28 |
| 10 | 28 |
| 11 | 28 |
| 12 | 28 |
| 13 | 28 |
| 14 | 28 |
| 15 | 28 |
| 16 | 28 |
| 17 | 28 |
| 18 | 29 |
| 19 | 29 |
| 20 | 29 |
| 21 | 29 |
| 22 | 28 |
| 23 | 28 |
| 24 | 28 |
| 25 | 28 |
| 26 | 28 |
| 27 | 28 |
| 28 | 28 |
| 29 | 28 |
| 30 | 28 |
| 31 | 28 |
Humidity in December
Most of December feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December lands in the humid band about 35% of days. Sticky, muggy-or-worse air turns up on roughly 13% of them.
| 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 (%) | 33 | 33 | 32 | 32 | 31 | 30 | 29 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 22 | 21 | 20 | 20 | 20 | 19 | 19 | 18 | 18 | 18 | 17 | 17 | 17 | 17 | 16 | 16 |
| Comfortable (%) | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 29 | 29 | 28 | 28 | 28 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 24 | 24 |
| Humid (%) | 29 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 32 | 32 | 32 | 33 | 33 | 34 | 34 | 35 | 35 | 36 | 37 | 37 | 38 | 38 | 39 | 39 | 40 | 40 | 41 | 41 | 41 | 41 | 41 |
| Muggy (%) | 7 | 8 | 8 | 8 | 9 | 9 | 10 | 10 | 10 | 11 | 11 | 11 | 12 | 12 | 13 | 13 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 17 | 17 | 18 | 19 |
| Oppressive (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 33 | 30 | 29 | 7 | 0 |
| 2 | 33 | 30 | 30 | 8 | 0 |
| 3 | 32 | 30 | 30 | 8 | 0 |
| 4 | 32 | 30 | 30 | 8 | 0 |
| 5 | 31 | 30 | 30 | 9 | 0 |
| 6 | 30 | 30 | 31 | 9 | 0 |
| 7 | 29 | 30 | 31 | 10 | 0 |
| 8 | 29 | 30 | 31 | 10 | 0 |
| 9 | 28 | 30 | 32 | 10 | 0 |
| 10 | 27 | 30 | 32 | 11 | 0 |
| 11 | 26 | 31 | 32 | 11 | 0 |
| 12 | 25 | 31 | 33 | 11 | 0 |
| 13 | 24 | 31 | 33 | 12 | 0 |
| 14 | 23 | 31 | 34 | 12 | 0 |
| 15 | 22 | 30 | 34 | 13 | 0 |
| 16 | 22 | 30 | 35 | 13 | 0 |
| 17 | 21 | 30 | 35 | 14 | 0 |
| 18 | 20 | 29 | 36 | 14 | 0 |
| 19 | 20 | 29 | 37 | 14 | 0 |
| 20 | 20 | 28 | 37 | 14 | 0 |
| 21 | 19 | 28 | 38 | 15 | 0 |
| 22 | 19 | 28 | 38 | 15 | 0 |
| 23 | 18 | 27 | 39 | 15 | 0 |
| 24 | 18 | 27 | 39 | 15 | 0 |
| 25 | 18 | 26 | 40 | 15 | 0 |
| 26 | 17 | 26 | 40 | 16 | 0 |
| 27 | 17 | 26 | 41 | 16 | 0 |
| 28 | 17 | 25 | 41 | 17 | 0 |
| 29 | 17 | 25 | 41 | 17 | 0 |
| 30 | 16 | 24 | 41 | 18 | 0 |
| 31 | 16 | 24 | 41 | 19 | 1 |
Wind in December
Winds average 11 km/h in December.
Across December, daily wind ranges from about 11 km/h on the calmest days to 11 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) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 11 | calm |
| 2 | 11 | calm |
| 3 | 11 | calm |
| 4 | 11 | calm |
| 5 | 11 | calm |
| 6 | 11 | calm |
| 7 | 11 | calm |
| 8 | 11 | calm |
| 9 | 11 | calm |
| 10 | 11 | calm |
| 11 | 11 | calm |
| 12 | 11 | calm |
| 13 | 11 | calm |
| 14 | 11 | calm |
| 15 | 11 | calm |
| 16 | 11 | calm |
| 17 | 11 | calm |
| 18 | 11 | calm |
| 19 | 11 | calm |
| 20 | 11 | calm |
| 21 | 11 | calm |
| 22 | 11 | calm |
| 23 | 11 | calm |
| 24 | 11 | calm |
| 25 | 11 | calm |
| 26 | 11 | calm |
| 27 | 11 | calm |
| 28 | 11 | calm |
| 29 | 11 | calm |
| 30 | 11 | calm |
| 31 | 11 | calm |
Sunrise & sunset in December
Daylight runs from about 14 h 06 min at the start of December to 14 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 6 minutes over December. Sunrise moves from 5:44 AM to 5:53 AM, and sunset from 7:49 PM to 8:06 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) | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.1 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 | 14.2 |
| Sunrise (AM) | 5:44 | 5:44 | 5:44 | 5:44 | 5:44 | 5:44 | 5:44 | 5:44 | 5:44 | 5:44 | 5:44 | 5:44 | 5:45 | 5:45 | 5:45 | 5:46 | 5:46 | 5:46 | 5:47 | 5:47 | 5:47 | 5:48 | 5:48 | 5:49 | 5:49 | 5:50 | 5:51 | 5:51 | 5:52 | 5:52 | 5:53 |
| Sunset (PM) | 7:49 | 7:49 | 7:50 | 7:51 | 7:52 | 7:53 | 7:53 | 7:54 | 7:55 | 7:56 | 7:56 | 7:57 | 7:58 | 7:58 | 7:59 | 7:59 | 8:00 | 8:01 | 8:01 | 8:02 | 8:02 | 8:03 | 8:03 | 8:04 | 8:04 | 8:04 | 8:05 | 8:05 | 8:05 | 8:06 | 8:06 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.1 | 5:44 | 7:49 |
| 2 | 14.1 | 5:44 | 7:49 |
| 3 | 14.1 | 5:44 | 7:50 |
| 4 | 14.1 | 5:44 | 7:51 |
| 5 | 14.1 | 5:44 | 7:52 |
| 6 | 14.1 | 5:44 | 7:53 |
| 7 | 14.2 | 5:44 | 7:53 |
| 8 | 14.2 | 5:44 | 7:54 |
| 9 | 14.2 | 5:44 | 7:55 |
| 10 | 14.2 | 5:44 | 7:56 |
| 11 | 14.2 | 5:44 | 7:56 |
| 12 | 14.2 | 5:44 | 7:57 |
| 13 | 14.2 | 5:45 | 7:58 |
| 14 | 14.2 | 5:45 | 7:58 |
| 15 | 14.2 | 5:45 | 7:59 |
| 16 | 14.2 | 5:46 | 7:59 |
| 17 | 14.2 | 5:46 | 8:00 |
| 18 | 14.2 | 5:46 | 8:01 |
| 19 | 14.2 | 5:47 | 8:01 |
| 20 | 14.2 | 5:47 | 8:02 |
| 21 | 14.2 | 5:47 | 8:02 |
| 22 | 14.2 | 5:48 | 8:03 |
| 23 | 14.2 | 5:48 | 8:03 |
| 24 | 14.2 | 5:49 | 8:04 |
| 25 | 14.2 | 5:49 | 8:04 |
| 26 | 14.2 | 5:50 | 8:04 |
| 27 | 14.2 | 5:51 | 8:05 |
| 28 | 14.2 | 5:51 | 8:05 |
| 29 | 14.2 | 5:52 | 8:05 |
| 30 | 14.2 | 5:52 | 8:06 |
| 31 | 14.2 | 5:53 | 8:06 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 6.53 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 2.48 kWh/m² to a high of 6.53 kWh/m² in December across the year — December's 6.53 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) | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.5 | 6.6 | 6.6 | 6.6 | 6.6 | 6.7 | 6.7 | 6.8 | 6.8 | 6.8 | 6.9 | 6.9 | 6.9 | 6.9 | 6.9 |
| 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 | 6.5 | Intense |
| 2 | 6.5 | Intense |
| 3 | 6.5 | Intense |
| 4 | 6.5 | Intense |
| 5 | 6.5 | Intense |
| 6 | 6.5 | Intense |
| 7 | 6.5 | Intense |
| 8 | 6.5 | Intense |
| 9 | 6.5 | Intense |
| 10 | 6.5 | Intense |
| 11 | 6.5 | Intense |
| 12 | 6.5 | Intense |
| 13 | 6.5 | Intense |
| 14 | 6.5 | Intense |
| 15 | 6.5 | Intense |
| 16 | 6.5 | Intense |
| 17 | 6.5 | Intense |
| 18 | 6.6 | Intense |
| 19 | 6.6 | Intense |
| 20 | 6.6 | Intense |
| 21 | 6.6 | Intense |
| 22 | 6.7 | Intense |
| 23 | 6.7 | Intense |
| 24 | 6.8 | Intense |
| 25 | 6.8 | Intense |
| 26 | 6.8 | Intense |
| 27 | 6.9 | Intense |
| 28 | 6.9 | Intense |
| 29 | 6.9 | Intense |
| 30 | 6.9 | Intense |
| 31 | 6.9 | Intense |
Hazard calendar for Blacktown
In December, Blacktown sits inside its cyclone season. The full year is below, with each hazard's peak months called out.
Blacktown sits in the South Indian Ocean cyclone belt; the season peaks January–March.
Is December a good time to visit Blacktown?
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 Blacktown for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Blacktown in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Blacktown sees daytime highs around 27°C and nights near 17°C. Pack sun protection. Worth having: light clothes and rain gear. About 9 days see rain.
Sea temperature near Blacktown 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 44 km away) is warmest in February at about 23°C and coldest in August near 18°C.
It's comfortable for a long swim from Nov 13 to Jun 7 — about 6.8 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 23 | 23 | 23 | 22 | 21 | 20 | 19 | 18 | 18 | 19 | 20 | 21 |
| Comfort | Refreshing | Refreshing | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 23 | Refreshing |
| Feb | 23 | Refreshing |
| Mar | 23 | Refreshing |
| Apr | 22 | Refreshing |
| May | 21 | Refreshing |
| Jun | 20 | Cool |
| Jul | 19 | Cool |
| Aug | 18 | Cool |
| Sep | 18 | Cool |
| Oct | 19 | Cool |
| Nov | 20 | Refreshing |
| Dec | 21 | Refreshing |
UV index in Blacktown in December
Clear-sky midday UV in December peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Blacktown peaks around January 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 18 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 12 | 12 | 9 | 6 | 4 | 2 | 3 | 4 | 6 | 8 | 10 | 11 |
| Level | Extreme | Extreme | Very high | High | Moderate | Moderate | Moderate | Moderate | High | Very high | Very high | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 12 | Extreme |
| Feb | 12 | Extreme |
| Mar | 9 | Very high |
| Apr | 6 | High |
| May | 4 | Moderate |
| Jun | 2 | Moderate |
| Jul | 3 | Moderate |
| Aug | 4 | Moderate |
| Sep | 6 | High |
| Oct | 8 | Very high |
| Nov | 10 | Very high |
| Dec | 11 | Extreme |
Air quality in Blacktown 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 Blacktown is worst in December — around 49 µg/m³ PM2.5 (poor), about 8.1× the cleanest month (June, 6 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) | 11 | 7 | 7 | 8 | 8 | 6 | 6 | 8 | 10 | 10 | 25 | 49 |
| Level | Good | Good | Good | Good | Good | Good | Good | Good | Good | Good | Moderate | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 7 | Good |
| Mar | 7 | Good |
| Apr | 8 | Good |
| May | 8 | Good |
| Jun | 6 | Good |
| Jul | 6 | Good |
| Aug | 8 | Good |
| Sep | 10 | Good |
| Oct | 10 | Good |
| Nov | 25 | Moderate |
| Dec | 49 | Poor |
Where is Blacktown?
Blacktown sits at 33.8°S, 150.9°E, 67 m above sea level, in Australia. The nearest listed city is Seven Hills, 2.0 km away.
Topography around Blacktown
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Blacktown.
Within 3 km, the terrain around Blacktown has only modest variations in elevation — a maximum elevation change of 65 m around an average of 57 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 278 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,350 m.
The land around Blacktown is covered by artificial surfaces (61%) and trees (33%) within 3 km, artificial surfaces (40%) and trees (39%) within 16 km, and trees (63%) and water (24%) 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 Blacktown (-33.7667°, 150.9167°, elevation 67 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).