Hangzhou weather in December
In December, Hangzhou sees average daytime highs of 12°C and overnight lows near 4°C, with 59 mm of precipitation across 7.5 wet days and about 10.1 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.
Highs ease over the month, from about 13°C in the first days to 10°C by the end. The sky is clear or mostly clear about 44% of the time in December, and the air most often feels dry.
Daylight stretches from about 10 h 12 min at the start of December to 10 h 06 min by month's end. Set against the rest of the year, December is Hangzhou's 1st-clearest and 8th-windiest month. For the whole year in context, see Hangzhou's year-round climate.
- Daytime high
- 12°
- 10th warmest
- Overnight low
- 4°
- 3rd coldest
- Precipitation
- 59 mm
- 7.5 wet days
- Daylight
- 10 h 06 min
- 6:54 AM – 4:57 PM
- Cloud cover
- 51%
- 1st clearest
- Wind
- 9 km/h
- 8th windiest
- Solar energy
- 2.46 kWh/m²
- Travel score
- 3.2
- out of 10
Hangzhou is capital of Zhejiang Province, China.
- Air quality
- High
- PM2.5 29.5 µg/m³ · 2019
- Density
- 548/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Highs ease over the month, from about 13°C in the first days to 10°C by the end.
A typical December day in Hangzhou reaches about 12°C in the afternoon and slips back to 4°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 17°C. Set against its neighbours, December runs about 6°C cooler than November and about 3°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) | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Avg low (°C) | 7 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 14 | 7 |
| 2 | 14 | 6 |
| 3 | 14 | 6 |
| 4 | 13 | 6 |
| 5 | 13 | 6 |
| 6 | 13 | 6 |
| 7 | 13 | 5 |
| 8 | 12 | 5 |
| 9 | 12 | 5 |
| 10 | 12 | 5 |
| 11 | 12 | 5 |
| 12 | 12 | 4 |
| 13 | 12 | 4 |
| 14 | 11 | 4 |
| 15 | 11 | 4 |
| 16 | 11 | 4 |
| 17 | 11 | 4 |
| 18 | 11 | 4 |
| 19 | 11 | 3 |
| 20 | 11 | 3 |
| 21 | 11 | 3 |
| 22 | 11 | 3 |
| 23 | 11 | 3 |
| 24 | 10 | 3 |
| 25 | 10 | 3 |
| 26 | 10 | 3 |
| 27 | 10 | 3 |
| 28 | 10 | 3 |
| 29 | 10 | 3 |
| 30 | 10 | 3 |
| 31 | 10 | 3 |
How December really feels in Hangzhou
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.
Hangzhou weather by month
How December compares with the rest of the year at a glance. December is the 10th-warmest and 11th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 9° / 2° | 80 | 10.4 | 1.6 | 10.3 | 1.7 |
| Feb | 11° / 4° | 73 | 9.9 | 1 | 10.9 | 2.7 |
| Mar | 16° / 8° | 119 | 13.5 | 0.2 | 11.8 | 4.4 |
| Apr | 22° / 13° | 131 | 12.1 | 0 | 12.7 | 6.0 |
| May | 27° / 18° | 157 | 12.2 | 0 | 13.5 | 6.1 |
| Jun | 29° / 22° | 303 | 16.2 | 0 | 13.9 | 4.5 |
| Jul | 34° / 26° | 173 | 12.9 | 0 | 13.8 | 2.8 |
| Aug | 33° / 26° | 141 | 14.8 | 0 | 13.1 | 3.0 |
| Sep | 29° / 22° | 98 | 10.1 | 0 | 12.2 | 5.6 |
| Oct | 24° / 16° | 59 | 6.3 | 0 | 11.3 | 7.4 |
| Nov | 18° / 10° | 65 | 8.5 | 0 | 10.5 | 5.9 |
| Dec | 12° / 4° | 59 | 7.5 | 0.4 | 10.1 | 3.2 |
Cloud cover in December
The sky is clear or mostly clear about 44% of the time in December, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 10% of December, with mostly cloudy or overcast conditions the remaining 46%.
| 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 (%) | 50 | 51 | 51 | 51 | 52 | 53 | 53 | 54 | 54 | 54 | 54 | 54 | 54 | 55 | 55 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 55 | 55 | 55 | 55 | 54 | 54 | 53 | 52 |
| Cloudier (%) | 50 | 49 | 49 | 49 | 48 | 47 | 47 | 46 | 46 | 46 | 46 | 46 | 46 | 45 | 45 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 45 | 45 | 45 | 45 | 46 | 46 | 47 | 48 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 50 | 50 |
| 2 | 51 | 49 |
| 3 | 51 | 49 |
| 4 | 51 | 49 |
| 5 | 52 | 48 |
| 6 | 53 | 47 |
| 7 | 53 | 47 |
| 8 | 54 | 46 |
| 9 | 54 | 46 |
| 10 | 54 | 46 |
| 11 | 54 | 46 |
| 12 | 54 | 46 |
| 13 | 54 | 46 |
| 14 | 55 | 45 |
| 15 | 55 | 45 |
| 16 | 54 | 46 |
| 17 | 54 | 46 |
| 18 | 54 | 46 |
| 19 | 54 | 46 |
| 20 | 54 | 46 |
| 21 | 54 | 46 |
| 22 | 54 | 46 |
| 23 | 54 | 46 |
| 24 | 55 | 45 |
| 25 | 55 | 45 |
| 26 | 55 | 45 |
| 27 | 55 | 45 |
| 28 | 54 | 46 |
| 29 | 54 | 46 |
| 30 | 53 | 47 |
| 31 | 52 | 48 |
Chance of precipitation in December
Hangzhou gets around 59 mm of rain and snow over 7.5 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 25% and peaks near 27% on the wettest days, and about 0 day brings snow.
| 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 (%) | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 24 | 24 | 25 | 25 | 25 | 26 | 27 |
| Snow chance (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 26 | 1 |
| 2 | 26 | 1 |
| 3 | 26 | 1 |
| 4 | 25 | 1 |
| 5 | 25 | 1 |
| 6 | 25 | 1 |
| 7 | 25 | 1 |
| 8 | 24 | 1 |
| 9 | 24 | 1 |
| 10 | 24 | 1 |
| 11 | 25 | 1 |
| 12 | 25 | 1 |
| 13 | 25 | 1 |
| 14 | 25 | 1 |
| 15 | 25 | 1 |
| 16 | 26 | 1 |
| 17 | 26 | 1 |
| 18 | 26 | 1 |
| 19 | 26 | 1 |
| 20 | 26 | 1 |
| 21 | 25 | 1 |
| 22 | 25 | 1 |
| 23 | 25 | 1 |
| 24 | 25 | 2 |
| 25 | 24 | 2 |
| 26 | 24 | 2 |
| 27 | 25 | 2 |
| 28 | 25 | 2 |
| 29 | 25 | 3 |
| 30 | 26 | 3 |
| 31 | 27 | 3 |
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 99% 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 (%) | 95 | 95 | 95 | 95 | 97 | 97 | 97 | 98 | 98 | 98 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 |
| Comfortable (%) | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Humid (%) | 1 | 1 | 1 | 1 | 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 |
| Dry (%) | Comfortable (%) | Humid (%) | |
|---|---|---|---|
| 1 | 95 | 4 | 1 |
| 2 | 95 | 4 | 1 |
| 3 | 95 | 4 | 1 |
| 4 | 95 | 4 | 1 |
| 5 | 97 | 3 | 0 |
| 6 | 97 | 3 | 0 |
| 7 | 97 | 3 | 0 |
| 8 | 98 | 2 | 0 |
| 9 | 98 | 2 | 0 |
| 10 | 98 | 2 | 0 |
| 11 | 99 | 1 | 0 |
| 12 | 99 | 1 | 0 |
| 13 | 99 | 1 | 0 |
| 14 | 99 | 1 | 0 |
| 15 | 99 | 1 | 0 |
| 16 | 99 | 1 | 0 |
| 17 | 99 | 1 | 0 |
| 18 | 100 | 0 | 0 |
| 19 | 100 | 0 | 0 |
| 20 | 100 | 0 | 0 |
| 21 | 100 | 0 | 0 |
| 22 | 100 | 0 | 0 |
| 23 | 100 | 0 | 0 |
| 24 | 100 | 0 | 0 |
| 25 | 100 | 0 | 0 |
| 26 | 100 | 0 | 0 |
| 27 | 100 | 0 | 0 |
| 28 | 100 | 0 | 0 |
| 29 | 100 | 0 | 0 |
| 30 | 100 | 0 | 0 |
| 31 | 100 | 0 | 0 |
Wind in December
Winds average 9 km/h in December.
Across December, daily wind ranges from about 8 km/h on the calmest days to 9 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) | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 |
| 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 | 9 | calm |
| 2 | 9 | calm |
| 3 | 9 | calm |
| 4 | 9 | calm |
| 5 | 9 | calm |
| 6 | 9 | calm |
| 7 | 9 | calm |
| 8 | 9 | calm |
| 9 | 9 | calm |
| 10 | 9 | calm |
| 11 | 9 | calm |
| 12 | 9 | calm |
| 13 | 9 | calm |
| 14 | 9 | calm |
| 15 | 9 | calm |
| 16 | 9 | calm |
| 17 | 9 | calm |
| 18 | 9 | calm |
| 19 | 9 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 8 | calm |
| 29 | 8 | calm |
| 30 | 8 | calm |
| 31 | 8 | calm |
Sunrise & sunset in December
Daylight runs from about 10 h 12 min at the start of December to 10 h 06 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 6:44 AM to 7:00 AM, and sunset from 4:55 PM to 5:05 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) | 10.2 | 10.2 | 10.2 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.0 | 10.1 | 10.1 | 10.1 | 10.1 | 10.1 |
| Sunrise (AM) | 6:44 | 6:44 | 6:45 | 6:46 | 6:47 | 6:47 | 6:48 | 6:49 | 6:49 | 6:50 | 6:51 | 6:51 | 6:52 | 6:53 | 6:53 | 6:54 | 6:54 | 6:55 | 6:56 | 6:56 | 6:57 | 6:57 | 6:57 | 6:58 | 6:58 | 6:59 | 6:59 | 6:59 | 7:00 | 7:00 | 7:00 |
| Sunset (PM) | 4:55 | 4:55 | 4:55 | 4:55 | 4:55 | 4:55 | 4:55 | 4:55 | 4:55 | 4:56 | 4:56 | 4:56 | 4:56 | 4:57 | 4:57 | 4:57 | 4:58 | 4:58 | 4:58 | 4:59 | 4:59 | 5:00 | 5:00 | 5:01 | 5:01 | 5:02 | 5:02 | 5:03 | 5:03 | 5:04 | 5:05 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 10.2 | 6:44 | 4:55 |
| 2 | 10.2 | 6:44 | 4:55 |
| 3 | 10.2 | 6:45 | 4:55 |
| 4 | 10.1 | 6:46 | 4:55 |
| 5 | 10.1 | 6:47 | 4:55 |
| 6 | 10.1 | 6:47 | 4:55 |
| 7 | 10.1 | 6:48 | 4:55 |
| 8 | 10.1 | 6:49 | 4:55 |
| 9 | 10.1 | 6:49 | 4:55 |
| 10 | 10.1 | 6:50 | 4:56 |
| 11 | 10.1 | 6:51 | 4:56 |
| 12 | 10.1 | 6:51 | 4:56 |
| 13 | 10.1 | 6:52 | 4:56 |
| 14 | 10.1 | 6:53 | 4:57 |
| 15 | 10.1 | 6:53 | 4:57 |
| 16 | 10.1 | 6:54 | 4:57 |
| 17 | 10.1 | 6:54 | 4:58 |
| 18 | 10.0 | 6:55 | 4:58 |
| 19 | 10.0 | 6:56 | 4:58 |
| 20 | 10.0 | 6:56 | 4:59 |
| 21 | 10.0 | 6:57 | 4:59 |
| 22 | 10.0 | 6:57 | 5:00 |
| 23 | 10.0 | 6:57 | 5:00 |
| 24 | 10.0 | 6:58 | 5:01 |
| 25 | 10.0 | 6:58 | 5:01 |
| 26 | 10.0 | 6:59 | 5:02 |
| 27 | 10.1 | 6:59 | 5:02 |
| 28 | 10.1 | 6:59 | 5:03 |
| 29 | 10.1 | 7:00 | 5:03 |
| 30 | 10.1 | 7:00 | 5:04 |
| 31 | 10.1 | 7:00 | 5:05 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 2.46 kWh/m² — the year's lowest.
For context, solar energy here swings from a low near 2.46 kWh/m² to a high of 5.27 kWh/m² in July across the year — December's 2.46 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) | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 |
| 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 | 2.4 | Moderate |
| 2 | 2.4 | Moderate |
| 3 | 2.4 | Moderate |
| 4 | 2.4 | Moderate |
| 5 | 2.4 | Moderate |
| 6 | 2.4 | Moderate |
| 7 | 2.4 | Moderate |
| 8 | 2.4 | Moderate |
| 9 | 2.4 | Moderate |
| 10 | 2.4 | Moderate |
| 11 | 2.4 | Moderate |
| 12 | 2.4 | Moderate |
| 13 | 2.4 | Moderate |
| 14 | 2.4 | Moderate |
| 15 | 2.4 | Moderate |
| 16 | 2.4 | Moderate |
| 17 | 2.4 | Moderate |
| 18 | 2.4 | Moderate |
| 19 | 2.4 | Moderate |
| 20 | 2.5 | Moderate |
| 21 | 2.5 | Moderate |
| 22 | 2.5 | Moderate |
| 23 | 2.5 | Moderate |
| 24 | 2.5 | Moderate |
| 25 | 2.5 | Moderate |
| 26 | 2.5 | Moderate |
| 27 | 2.5 | Moderate |
| 28 | 2.5 | Moderate |
| 29 | 2.5 | Moderate |
| 30 | 2.5 | Moderate |
| 31 | 2.5 | Moderate |
Hazard calendar for Hangzhou
In December, Hangzhou sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Hangzhou sits in the Pacific typhoon belt; the season peaks July–October.
Hangzhou's rainy season runs May–August, when most of the year's rain falls.
Is December a good time to visit Hangzhou?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a weaker month for outdoor sightseeing in Hangzhou.
What to pack for Hangzhou in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Hangzhou sees daytime highs around 12°C and nights near 4°C. Pack a warm layer. About 8 days see rain.
Sea temperature near Hangzhou in December
The nearest coast averages about 12°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 45 km away) is warmest in August at about 29°C and coldest in February near 7°C.
It's comfortable for a long swim from May 22 to Oct 29 — about 5.3 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 8 | 7 | 10 | 14 | 19 | 24 | 27 | 29 | 26 | 22 | 17 | 12 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Tropical | Warm | Refreshing | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 8 | Bracing |
| Feb | 7 | Bracing |
| Mar | 10 | Bracing |
| Apr | 14 | Bracing |
| May | 19 | Cool |
| Jun | 24 | Refreshing |
| Jul | 27 | Warm |
| Aug | 29 | Tropical |
| Sep | 26 | Warm |
| Oct | 22 | Refreshing |
| Nov | 17 | Cool |
| Dec | 12 | Bracing |
UV index in Hangzhou in December
Clear-sky midday UV in December peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Hangzhou peaks around July 20 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 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) | 3 | 5 | 6 | 7 | 8 | 8 | 10 | 9 | 10 | 5 | 4 | 3 |
| Level | Moderate | High | High | Very high | Very high | Very high | Very high | Very high | Very high | Moderate | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 5 | High |
| Mar | 6 | High |
| Apr | 7 | Very high |
| May | 8 | Very high |
| Jun | 8 | Very high |
| Jul | 10 | Very high |
| Aug | 9 | Very high |
| Sep | 10 | Very high |
| Oct | 5 | Moderate |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Air quality in Hangzhou 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 Hangzhou is worst in December — around 39 µg/m³ PM2.5 (poor), about 2.2× the cleanest month (August, 18 µg/m³).
Seasonal pattern from CAMS reanalysis, scaled to Hangzhou's WHO annual average of 29.5 µg/m³.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 39 | 37 | 36 | 32 | 27 | 24 | 19 | 18 | 23 | 27 | 33 | 39 |
| Level | Poor | Poor | Poor | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Poor |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 39 | Poor |
| Feb | 37 | Poor |
| Mar | 36 | Poor |
| Apr | 32 | Moderate |
| May | 27 | Moderate |
| Jun | 24 | Moderate |
| Jul | 19 | Moderate |
| Aug | 18 | Moderate |
| Sep | 23 | Moderate |
| Oct | 27 | Moderate |
| Nov | 33 | Moderate |
| Dec | 39 | Poor |
Where is Hangzhou?
Hangzhou sits at 30.3°N, 120.2°E, 12 m above sea level, in China. The nearest listed city is Pingyao, 22 km away.
Topography around Hangzhou
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Hangzhou.
Within 3 km, the terrain around Hangzhou has only modest variations in elevation — a maximum elevation change of 28 m around an average of 10 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 415 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,634 m.
The land around Hangzhou is covered by artificial surfaces (77%) within 3 km, artificial surfaces (48%) and trees (26%) within 16 km, and trees (51%) and cropland (22%) within 80 km.
China travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / I
- 220 V · 50 Hz
- Prices
- ≈ 47% of US
- price level, 2025
- GDP per capita
- $13,862
- 2025
- Happiness
- 6.1 / 10
- World Happiness, 2025
- Homicide rate
- 0.5
- per 100k, 2020
- Road deaths
- 17.4
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 464
- 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 Hangzhou (30.2936°, 120.1614°, elevation 12 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).