Climate averages 1991–2020
Longjiang weather
in September.
A mild, moderately wet month: the 5th warmest and the 9th 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 Longjiang: daytime highs average 20.3°C and nights cool to about 9.9°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 52 mm of rain on roughly 7 days, which makes September a moderately wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 37 min on an average September day.
The nearest other city in this atlas is Hulan Ergi (36 km away). In September its highs average 20.3°C, about as warm as Longjiang, with 53 mm of rain.
Among the 884 cities listed in China, Longjiang ranks joint 817th of 884 for the warmest September highs and joint 90th of 884 for the driest September (rainfall, lowest first). The mean September high of those 884 cities is 25.7°C; Longjiang is 5.4°C cooler than that mean.
From September to October, average highs fall by 9.3°C to 11.0°C, and monthly rainfall falls from 52 mm to 22 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
Longjiang climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -11.8°C-22.1°C | -22.1°C | 1.6 | 0.5 | 8.99 h |
| February | -5.6°C-17.5°C | -17.5°C | 2.7 | 0.8 | 10.210 h |
| March | 3.6°C-8.2°C | -8.2°C | 7.1 | 1.9 | 11.912 h |
| April | 13.5°C0.2°C | 0.2°C | 24 | 4.2 | 13.614 h |
| May | 21.4°C8.2°C | 8.2°C | 37 | 5.7 | 15.115 h |
| June | 26.4°C15.1°C | 15.1°C | 87 | 10.7 | 15.916 h |
| July | 27.9°C18.4°C | 18.4°C | 132 | 13.1 | 15.516 h |
| August | 25.8°C16.5°C | 16.5°C | 94 | 10.4 | 14.314 h |
| September, selected | 20.3°C9.9°C | 9.9°C | 52 | 6.8 | 12.613 h |
| October | 11.0°C0.9°C | 0.9°C | 22 | 4.7 | 10.911 h |
| November | -1.0°C-9.4°C | -9.4°C | 5.1 | 1.7 | 9.49 h |
| December | -10.4°C-19.1°C | -19.1°C | 4.8 | 1.8 | 8.59 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
- Hulan Ergi in SeptemberChina · 36 kmHigh 20.3°C · Low 10.3°C · 53 mm rain
- Qiqihar in SeptemberChina · 58 kmHigh 20.1°C · Low 10.7°C · 55 mm rain
- Zhalantun in SeptemberChina · 82 kmHigh 18.8°C · Low 8.2°C · 59 mm rain
- Fuyu (Heilongjiang), China in SeptemberChina · 108 kmHigh 19.5°C · Low 9.8°C · 61 mm rain
- Daqing in SeptemberChina · 160 kmHigh 20.2°C · Low 11.1°C · 55 mm rain
- Ulanhot in SeptemberChina · 163 kmHigh 20.7°C · Low 10.1°C · 47 mm rain
- Honggang in SeptemberChina · 165 kmHigh 20.6°C · Low 11.2°C · 55 mm rain
- Longfeng in SeptemberChina · 170 kmHigh 20.3°C · Low 11.2°C · 55 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 Longjiang) is explained once on the Longjiang year overview and on the Sources, method and limits page.