Climate averages 1991–2020
Ya'an weather
in December.
A cool, moderately wet month: the 11th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cool month in Ya'an: daytime highs average 9.8°C and nights cool to about 4.4°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 44 mm of rain on roughly 12 days, which makes December a moderately wet month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 10 h 15 min on an average December day.
The nearest other city in this atlas is Meishan (81 km away). In December its highs average 11.6°C, 1.8°C warmer than Ya'an, with 28 mm of rain.
Among the 884 cities listed in China, Ya'an ranks joint 411th of 884 for the warmest December highs and joint 711th of 884 for the driest December (rainfall, lowest first). The mean December high of those 884 cities is 7.5°C; Ya'an is 2.3°C warmer than that mean.
From December to January, average highs fall by 1.5°C to 8.3°C, and monthly rainfall rises from 44 mm to 45 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Ya'an climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.3°C2.7°C | 2.7°C | 45 | 12.9 | 10.410 h |
| February | 10.8°C4.5°C | 4.5°C | 52 | 13.4 | 11.111 h |
| March | 15.2°C8.1°C | 8.1°C | 76 | 15.2 | 12.012 h |
| April | 20.2°C12.7°C | 12.7°C | 104 | 15.3 | 12.913 h |
| May | 23.5°C16.5°C | 16.5°C | 129 | 17.1 | 13.614 h |
| June | 26.0°C19.8°C | 19.8°C | 168 | 18.2 | 14.014 h |
| July | 27.7°C21.6°C | 21.6°C | 284 | 22.0 | 13.914 h |
| August | 27.3°C21.3°C | 21.3°C | 329 | 22.5 | 13.213 h |
| September | 23.4°C18.8°C | 18.8°C | 197 | 20.5 | 12.412 h |
| October | 18.7°C14.6°C | 14.6°C | 119 | 20.4 | 11.511 h |
| November | 14.6°C9.8°C | 9.8°C | 76 | 15.5 | 10.711 h |
| December, selected | 9.8°C4.4°C | 4.4°C | 44 | 12.4 | 10.310 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Meishan in DecemberChina · 81 kmHigh 11.6°C · Low 5.4°C · 28 mm rain
- Leshan in DecemberChina · 88 kmHigh 11.5°C · Low 6.1°C · 42 mm rain
- Kangding in DecemberChina · 100 kmHigh 1.9°C · Low -9.8°C · 15 mm precipitation
- Luocheng in DecemberChina · 120 kmHigh 11.1°C · Low 5.8°C · 21 mm rain
- Chengdu in DecemberChina · 127 kmHigh 11.1°C · Low 4.6°C · 4.1 mm rain
- Ziyang in DecemberChina · 159 kmHigh 11.9°C · Low 5.8°C · 18 mm rain
- Deyang in DecemberChina · 184 kmHigh 10.5°C · Low 4.4°C · 9.7 mm rain
- Zigong in DecemberChina · 186 kmHigh 12.2°C · Low 6.8°C · 23 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Ya'an) is explained once on the Ya'an year overview and on the Sources, method and limits page.