Yuen Long San Hui weather in December
In December, Yuen Long San Hui sees average daytime highs of 21°C and overnight lows near 15°C, with 31 mm of rain across 4.2 wet days and about 10.7 hours of daylight. It is the 10th-warmest and 12th-wettest month of the year here.
Highs ease over the month, from about 22°C in the first days to 20°C by the end. The sky is clear or mostly clear about 47% of the time in December, and the air most often feels dry.
Daylight stretches from about 10 h 42 min at the start of December to 10 h 36 min by month's end. Set against the rest of the year, December is Yuen Long San Hui's 3rd-clearest and 1st-windiest month. For the whole year in context, see Yuen Long San Hui's year-round climate.
- Daytime high
- 21°
- 10th warmest
- Overnight low
- 15°
- 3rd coldest
- Rainfall
- 31 mm
- 4.2 wet days
- Daylight
- 10 h 36 min
- 7:01 AM – 5:39 PM
- Cloud cover
- 45%
- 3rd clearest
- Wind
- 13 km/h
- 1st windiest
- Solar energy
- 3.38 kWh/m²
- Travel score
- 7.5
- out of 10
Yuen Long San Hui is Town in Northwest New Territories Hong Kong.
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Highs ease over the month, from about 22°C in the first days to 20°C by the end.
A typical December day in Yuen Long San Hui reaches about 21°C in the afternoon and slips back to 15°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 24°C. Set against its neighbours, December runs about 4°C cooler than November and about 2°C warmer 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) | 22 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 |
| Avg low (°C) | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 22 | 17 |
| 2 | 22 | 16 |
| 3 | 22 | 16 |
| 4 | 22 | 16 |
| 5 | 22 | 16 |
| 6 | 22 | 16 |
| 7 | 21 | 16 |
| 8 | 21 | 16 |
| 9 | 21 | 15 |
| 10 | 21 | 15 |
| 11 | 21 | 15 |
| 12 | 21 | 15 |
| 13 | 21 | 15 |
| 14 | 20 | 15 |
| 15 | 20 | 15 |
| 16 | 20 | 14 |
| 17 | 20 | 14 |
| 18 | 20 | 14 |
| 19 | 20 | 14 |
| 20 | 20 | 14 |
| 21 | 20 | 14 |
| 22 | 20 | 14 |
| 23 | 20 | 14 |
| 24 | 20 | 14 |
| 25 | 20 | 14 |
| 26 | 20 | 14 |
| 27 | 20 | 14 |
| 28 | 20 | 14 |
| 29 | 20 | 14 |
| 30 | 20 | 14 |
| 31 | 20 | 14 |
How December really feels in Yuen Long San Hui
Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Yuen Long San Hui weather by month
How December compares with the rest of the year at a glance. December is the 10th-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 | 19° / 13° | 32 | 5.5 | 10.8 | 6.9 |
| Feb | 20° / 15° | 43 | 7.8 | 11.2 | 6.4 |
| Mar | 22° / 17° | 75 | 11.4 | 11.8 | 6.3 |
| Apr | 26° / 21° | 125 | 13.8 | 12.5 | 5.8 |
| May | 29° / 24° | 229 | 19.1 | 13.1 | 4.4 |
| Jun | 30° / 26° | 319 | 22.9 | 13.3 | 3.2 |
| Jul | 31° / 27° | 243 | 22.1 | 13.2 | 3.1 |
| Aug | 31° / 27° | 313 | 23.6 | 12.8 | 3.1 |
| Sep | 30° / 26° | 199 | 16.6 | 12.1 | 4.1 |
| Oct | 28° / 23° | 61 | 6.7 | 11.5 | 6.7 |
| Nov | 25° / 19° | 34 | 4.9 | 10.9 | 7.9 |
| Dec | 21° / 15° | 31 | 4.2 | 10.7 | 7.5 |
Cloud cover in December
The sky is clear or mostly clear about 47% 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 37%.
| 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 (%) | 66 | 66 | 65 | 64 | 64 | 63 | 62 | 61 | 60 | 60 | 60 | 60 | 60 | 60 | 60 | 61 | 61 | 62 | 62 | 62 | 63 | 63 | 64 | 64 | 64 | 64 | 64 | 64 | 64 | 63 | 63 |
| Cloudier (%) | 34 | 34 | 35 | 36 | 36 | 37 | 38 | 39 | 40 | 40 | 40 | 40 | 40 | 40 | 40 | 39 | 39 | 38 | 38 | 38 | 37 | 37 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 37 | 37 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 66 | 34 |
| 2 | 66 | 34 |
| 3 | 65 | 35 |
| 4 | 64 | 36 |
| 5 | 64 | 36 |
| 6 | 63 | 37 |
| 7 | 62 | 38 |
| 8 | 61 | 39 |
| 9 | 60 | 40 |
| 10 | 60 | 40 |
| 11 | 60 | 40 |
| 12 | 60 | 40 |
| 13 | 60 | 40 |
| 14 | 60 | 40 |
| 15 | 60 | 40 |
| 16 | 61 | 39 |
| 17 | 61 | 39 |
| 18 | 62 | 38 |
| 19 | 62 | 38 |
| 20 | 62 | 38 |
| 21 | 63 | 37 |
| 22 | 63 | 37 |
| 23 | 64 | 36 |
| 24 | 64 | 36 |
| 25 | 64 | 36 |
| 26 | 64 | 36 |
| 27 | 64 | 36 |
| 28 | 64 | 36 |
| 29 | 64 | 36 |
| 30 | 63 | 37 |
| 31 | 63 | 37 |
Chance of precipitation in December
Yuen Long San Hui gets around 31 mm of rain over 4.2 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 14% and peaks near 15% 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 (%) | 15 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 |
| Rain chance (%) | |
|---|---|
| 1 | 15 |
| 2 | 14 |
| 3 | 14 |
| 4 | 14 |
| 5 | 14 |
| 6 | 13 |
| 7 | 13 |
| 8 | 13 |
| 9 | 13 |
| 10 | 14 |
| 11 | 14 |
| 12 | 14 |
| 13 | 14 |
| 14 | 14 |
| 15 | 14 |
| 16 | 14 |
| 17 | 14 |
| 18 | 14 |
| 19 | 14 |
| 20 | 14 |
| 21 | 14 |
| 22 | 14 |
| 23 | 14 |
| 24 | 14 |
| 25 | 14 |
| 26 | 14 |
| 27 | 14 |
| 28 | 14 |
| 29 | 14 |
| 30 | 14 |
| 31 | 14 |
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 59% of days. Sticky, muggy-or-worse air turns up on roughly 6% 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 (%) | 46 | 48 | 49 | 50 | 52 | 53 | 55 | 56 | 57 | 58 | 58 | 61 | 60 | 60 | 60 | 60 | 61 | 62 | 63 | 62 | 62 | 63 | 62 | 64 | 63 | 63 | 64 | 63 | 62 | 62 | 61 |
| Comfortable (%) | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 20 | 20 | 20 | 21 | 21 | 22 | 22 | 23 | 24 | 25 | 25 | 26 |
| Humid (%) | 18 | 17 | 16 | 16 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 14 | 14 | 14 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 |
| Muggy (%) | 13 | 12 | 11 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 |
| Oppressive (%) | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 46 | 20 | 18 | 13 | 3 |
| 2 | 48 | 20 | 17 | 12 | 3 |
| 3 | 49 | 20 | 16 | 11 | 3 |
| 4 | 50 | 21 | 16 | 11 | 3 |
| 5 | 52 | 21 | 15 | 10 | 2 |
| 6 | 53 | 21 | 15 | 9 | 2 |
| 7 | 55 | 21 | 14 | 8 | 2 |
| 8 | 56 | 21 | 14 | 7 | 2 |
| 9 | 57 | 21 | 14 | 6 | 2 |
| 10 | 58 | 21 | 14 | 5 | 2 |
| 11 | 58 | 21 | 14 | 5 | 2 |
| 12 | 61 | 20 | 14 | 4 | 1 |
| 13 | 60 | 20 | 15 | 4 | 1 |
| 14 | 60 | 20 | 15 | 4 | 1 |
| 15 | 60 | 20 | 15 | 4 | 1 |
| 16 | 60 | 20 | 15 | 4 | 1 |
| 17 | 61 | 19 | 15 | 4 | 1 |
| 18 | 62 | 19 | 15 | 4 | 0 |
| 19 | 63 | 19 | 14 | 4 | 0 |
| 20 | 62 | 20 | 14 | 4 | 0 |
| 21 | 62 | 20 | 14 | 4 | 0 |
| 22 | 63 | 20 | 13 | 4 | 0 |
| 23 | 62 | 21 | 13 | 4 | 0 |
| 24 | 64 | 21 | 12 | 3 | 0 |
| 25 | 63 | 22 | 12 | 3 | 0 |
| 26 | 63 | 22 | 12 | 3 | 0 |
| 27 | 64 | 23 | 11 | 2 | 0 |
| 28 | 63 | 24 | 11 | 2 | 0 |
| 29 | 62 | 25 | 11 | 2 | 0 |
| 30 | 62 | 25 | 11 | 2 | 0 |
| 31 | 61 | 26 | 11 | 2 | 0 |
Wind in December
Winds average 13 km/h in December, the windiest month of the year.
Across December, daily wind ranges from about 13 km/h on the calmest days to 13 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) | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
| 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 | 13 | light breeze |
| 2 | 13 | light breeze |
| 3 | 13 | light breeze |
| 4 | 13 | light breeze |
| 5 | 13 | light breeze |
| 6 | 13 | light breeze |
| 7 | 13 | light breeze |
| 8 | 13 | light breeze |
| 9 | 13 | light breeze |
| 10 | 13 | light breeze |
| 11 | 13 | light breeze |
| 12 | 13 | light breeze |
| 13 | 13 | light breeze |
| 14 | 13 | light breeze |
| 15 | 13 | light breeze |
| 16 | 13 | light breeze |
| 17 | 13 | light breeze |
| 18 | 13 | light breeze |
| 19 | 13 | light breeze |
| 20 | 13 | light breeze |
| 21 | 13 | light breeze |
| 22 | 13 | light breeze |
| 23 | 13 | light breeze |
| 24 | 13 | light breeze |
| 25 | 13 | light breeze |
| 26 | 13 | light breeze |
| 27 | 13 | light breeze |
| 28 | 13 | light breeze |
| 29 | 13 | light breeze |
| 30 | 13 | light breeze |
| 31 | 13 | light breeze |
Sunrise & sunset in December
Daylight runs from about 10 h 42 min at the start of December to 10 h 36 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 6 minutes over December. Sunrise moves from 6:52 AM to 7:08 AM, and sunset from 5:35 PM to 5:46 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) | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.7 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 | 10.6 |
| Sunrise (AM) | 6:52 | 6:53 | 6:53 | 6:54 | 6:54 | 6:55 | 6:56 | 6:56 | 6:57 | 6:58 | 6:58 | 6:59 | 6:59 | 7:00 | 7:00 | 7:01 | 7:02 | 7:02 | 7:03 | 7:03 | 7:04 | 7:04 | 7:05 | 7:05 | 7:05 | 7:06 | 7:06 | 7:07 | 7:07 | 7:07 | 7:08 |
| Sunset (PM) | 5:35 | 5:35 | 5:36 | 5:36 | 5:36 | 5:36 | 5:36 | 5:37 | 5:37 | 5:37 | 5:37 | 5:38 | 5:38 | 5:38 | 5:39 | 5:39 | 5:39 | 5:40 | 5:40 | 5:41 | 5:41 | 5:42 | 5:42 | 5:43 | 5:43 | 5:44 | 5:44 | 5:45 | 5:45 | 5:46 | 5:46 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 10.7 | 6:52 | 5:35 |
| 2 | 10.7 | 6:53 | 5:35 |
| 3 | 10.7 | 6:53 | 5:36 |
| 4 | 10.7 | 6:54 | 5:36 |
| 5 | 10.7 | 6:54 | 5:36 |
| 6 | 10.7 | 6:55 | 5:36 |
| 7 | 10.7 | 6:56 | 5:36 |
| 8 | 10.7 | 6:56 | 5:37 |
| 9 | 10.7 | 6:57 | 5:37 |
| 10 | 10.7 | 6:58 | 5:37 |
| 11 | 10.7 | 6:58 | 5:37 |
| 12 | 10.6 | 6:59 | 5:38 |
| 13 | 10.6 | 6:59 | 5:38 |
| 14 | 10.6 | 7:00 | 5:38 |
| 15 | 10.6 | 7:00 | 5:39 |
| 16 | 10.6 | 7:01 | 5:39 |
| 17 | 10.6 | 7:02 | 5:39 |
| 18 | 10.6 | 7:02 | 5:40 |
| 19 | 10.6 | 7:03 | 5:40 |
| 20 | 10.6 | 7:03 | 5:41 |
| 21 | 10.6 | 7:04 | 5:41 |
| 22 | 10.6 | 7:04 | 5:42 |
| 23 | 10.6 | 7:05 | 5:42 |
| 24 | 10.6 | 7:05 | 5:43 |
| 25 | 10.6 | 7:05 | 5:43 |
| 26 | 10.6 | 7:06 | 5:44 |
| 27 | 10.6 | 7:06 | 5:44 |
| 28 | 10.6 | 7:07 | 5:45 |
| 29 | 10.6 | 7:07 | 5:45 |
| 30 | 10.6 | 7:07 | 5:46 |
| 31 | 10.6 | 7:08 | 5:46 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 3.38 kWh/m² — the year's lowest.
For context, solar energy here swings from a low near 3.38 kWh/m² to a high of 5.5 kWh/m² in July across the year — December's 3.38 kWh/m² sits near the bottom.
| 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) | 3.5 | 3.5 | 3.5 | 3.5 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.3 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 3.5 | Moderate |
| 2 | 3.5 | Moderate |
| 3 | 3.5 | Moderate |
| 4 | 3.5 | Moderate |
| 5 | 3.4 | Moderate |
| 6 | 3.4 | Moderate |
| 7 | 3.4 | Moderate |
| 8 | 3.4 | Moderate |
| 9 | 3.4 | Moderate |
| 10 | 3.3 | Moderate |
| 11 | 3.3 | Moderate |
| 12 | 3.3 | Moderate |
| 13 | 3.3 | Moderate |
| 14 | 3.3 | Moderate |
| 15 | 3.3 | Moderate |
| 16 | 3.3 | Moderate |
| 17 | 3.3 | Moderate |
| 18 | 3.4 | Moderate |
| 19 | 3.4 | Moderate |
| 20 | 3.4 | Moderate |
| 21 | 3.4 | Moderate |
| 22 | 3.4 | Moderate |
| 23 | 3.4 | Moderate |
| 24 | 3.4 | Moderate |
| 25 | 3.4 | Moderate |
| 26 | 3.4 | Moderate |
| 27 | 3.4 | Moderate |
| 28 | 3.4 | Moderate |
| 29 | 3.4 | Moderate |
| 30 | 3.4 | Moderate |
| 31 | 3.4 | Moderate |
Hazard calendar for Yuen Long San Hui
In December, Yuen Long San Hui sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Yuen Long San Hui sits in the Pacific typhoon belt; the season peaks July–October.
Yuen Long San Hui's monsoon runs May–September, when most of the year's rain falls.
Is December a good time to visit Yuen Long San Hui?
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 Yuen Long San Hui for general sightseeing.
What to pack for Yuen Long San Hui in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Yuen Long San Hui sees daytime highs around 21°C and nights near 15°C. Little to plan around — just the basics. About 4 days see rain.
Sea temperature near Yuen Long San Hui in December
The nearest coast averages about 20°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 18 km away) is warmest in August at about 29°C and coldest in February near 19°C.
It's comfortable for a long swim from Mar 18 to Dec 18 — about 9.1 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 19 | 19 | 20 | 23 | 26 | 28 | 29 | 29 | 28 | 27 | 24 | 20 |
| Comfort | Cool | Cool | Cool | Refreshing | Warm | Warm | Tropical | Tropical | Tropical | Warm | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 19 | Cool |
| Feb | 19 | Cool |
| Mar | 20 | Cool |
| Apr | 23 | Refreshing |
| May | 26 | Warm |
| Jun | 28 | Warm |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 28 | Tropical |
| Oct | 27 | Warm |
| Nov | 24 | Refreshing |
| Dec | 20 | Refreshing |
UV index in Yuen Long San Hui in December
Clear-sky midday UV in December peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Yuen Long San Hui peaks around July 13 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 6 (high).
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) | 6 | 8 | 9 | 9 | 10 | 12 | 12 | 11 | 10 | 8 | 7 | 6 |
| Level | High | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 6 | High |
| Feb | 8 | Very high |
| Mar | 9 | Very high |
| Apr | 9 | Very high |
| May | 10 | Very high |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 10 | Very high |
| Oct | 8 | Very high |
| Nov | 7 | High |
| Dec | 6 | High |
Air quality in Yuen Long San Hui 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 Yuen Long San Hui is worst in January — around 183 µg/m³ PM2.5 (very unhealthy), about 2.5× the cleanest month (July, 73 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) | 183 | 175 | 165 | 149 | 115 | 83 | 73 | 85 | 119 | 127 | 157 | 156 |
| Level | Very unhealthy | Very unhealthy | Very unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Very unhealthy | Very unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 183 | Very unhealthy |
| Feb | 175 | Very unhealthy |
| Mar | 165 | Very unhealthy |
| Apr | 149 | Unhealthy |
| May | 115 | Unhealthy |
| Jun | 83 | Unhealthy |
| Jul | 73 | Unhealthy |
| Aug | 85 | Unhealthy |
| Sep | 119 | Unhealthy |
| Oct | 127 | Unhealthy |
| Nov | 157 | Very unhealthy |
| Dec | 156 | Very unhealthy |
Where is Yuen Long San Hui?
Yuen Long San Hui sits at 22.4°N, 114.0°E, 8 m above sea level, in Hong Kong. The nearest listed city is Shap Pat Heung, 1.0 km away.
Topography around Yuen Long San Hui
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Yuen Long San Hui.
Within 3 km, the terrain around Yuen Long San Hui has significant variations in elevation — a maximum elevation change of 278 m around an average of 42 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 948 m; within 80 km, large variations in elevation — a maximum elevation change of 1,020 m.
The land around Yuen Long San Hui is covered by trees (47%) and artificial surfaces (41%) within 3 km, trees (42%), water (30%) and artificial surfaces (22%) within 16 km, and water (54%) and trees (24%) within 80 km.
Hong Kong travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type D / G / M
- 220 V · 50 Hz
- Prices
- ≈ 71% of US
- price level, 2025
- GDP per capita
- $56,983
- 2025
- Happiness
- 5.6 / 10
- World Happiness, 2025
- Safe drinking water
- 100%
- of population, 2024
- Homicide rate
- 0.4
- per 100k, 2023
- Income group
- High
- World Bank
- English
- Moderate
- EF EPI 538
- 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 Yuen Long San Hui (22.4333°, 114.0333°, elevation 8 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).