Climate averages 1991–2020
Changchun weather
in September.
A mild, moderately wet month: the 4th warmest and the 8th driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Changchun: daytime highs average 21.4°C and nights cool to about 11.5°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 62 mm of rain on roughly 8 days, which makes September a moderately wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 33 min on an average September day.
The nearest other city in this atlas is Jiutai (51 km away). In September its highs average 21.3°C, about as warm as Changchun, with 64 mm of rain.
Among the 884 cities listed in China, Changchun ranks joint 772nd of 884 for the warmest September highs and joint 193rd of 884 for the driest September (rainfall, lowest first). The mean September high of those 884 cities is 25.7°C; Changchun is 4.3°C cooler than that mean.
From September to October, average highs fall by 8.3°C to 13.0°C, and monthly rainfall falls from 62 mm to 36 mm.
The annual picture
September in context
Monthly precipitation
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
Changchun climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -9.8°C-20.0°C | -20.0°C | 4.3 | 1.4 | 9.39 h |
| February | -4.0°C-15.4°C | -15.4°C | 6.2 | 1.7 | 10.410 h |
| March | 4.7°C-6.9°C | -6.9°C | 17 | 3.5 | 11.912 h |
| April | 14.2°C1.5°C | 1.5°C | 28 | 5.0 | 13.413 h |
| May | 21.2°C9.2°C | 9.2°C | 66 | 8.8 | 14.715 h |
| June | 26.0°C15.7°C | 15.7°C | 98 | 12.6 | 15.415 h |
| July | 27.6°C19.3°C | 19.3°C | 168 | 14.5 | 15.115 h |
| August | 26.2°C18.0°C | 18.0°C | 138 | 12.4 | 14.014 h |
| September, selected | 21.4°C11.5°C | 11.5°C | 62 | 7.8 | 12.613 h |
| October | 13.0°C3.2°C | 3.2°C | 36 | 6.6 | 11.011 h |
| November | 1.8°C-6.5°C | -6.5°C | 20 | 4.3 | 9.710 h |
| December | -7.4°C-16.8°C | -16.8°C | 7.9 | 2.4 | 9.09 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet 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
September in nearby cities
- Jiutai in SeptemberChina · 51 kmHigh 21.3°C · Low 11.2°C · 64 mm rain
- Gongzhuling in SeptemberChina · 58 kmHigh 21.5°C · Low 11.7°C · 58 mm rain
- Dehui in SeptemberChina · 79 kmHigh 21.3°C · Low 11.0°C · 60 mm rain
- Jilin in SeptemberChina · 99 kmHigh 20.9°C · Low 11.1°C · 74 mm rain
- Siping in SeptemberChina · 110 kmHigh 21.9°C · Low 11.9°C · 60 mm rain
- Longshan in SeptemberChina · 112 kmHigh 21.3°C · Low 11.3°C · 63 mm rain
- Panshi in SeptemberChina · 120 kmHigh 20.8°C · Low 10.4°C · 74 mm rain
- Jishu in SeptemberChina · 128 kmHigh 20.4°C · Low 10.7°C · 67 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 Changchun) is explained once on the Changchun year overview and on the Sources, method and limits page.