Longjiang climate
Longjiang (Heilongjiang, China) has a monsoon-influenced hot-summer humid continental climate (Köppen Dwa). The average temperature over the year is 4 °C39 °F, and about 491 mm19 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Longjiang climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | −139 | −23−10 | −18−1 | 40.1 | 31 |
| Feb | −818 | −21−5 | −146 | 40.2 | 28 |
| Mar | 236 | −1014 | −425 | 80.3 | 31 |
| Apr | 1356 | −131 | 643 | 210.8 | 19 |
| May | 2272 | 745 | 1559 | 431.7 | 1 |
| Jun | 2882 | 1458 | 2170 | 983.9 | 0 |
| Jul | 3085 | 1864 | 2474 | 1355.3 | 0 |
| Aug | 2781 | 1559 | 2170 | 933.7 | 0 |
| Sep | 2170 | 846 | 1458 | 542.1 | 1 |
| Oct | 1051 | −229 | 440 | 180.7 | 21 |
| Nov | −228 | −1112 | −720 | 70.3 | 30 |
| Dec | −1211 | −21−6 | −162 | 60.2 | 31 |
| Year | 3085 | −23−10 | 439 | 49119 | 193 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 80% | 45% | 1.9 | 8:52 |
| Feb | 76% | 45% | 3.0 | 10:12 |
| Mar | 63% | 46% | 4.3 | 11:45 |
| Apr | 50% | 53% | 5.3 | 13:33 |
| May | 49% | 61% | 5.8 | 15:04 |
| Jun | 59% | 64% | 5.8 | 15:55 |
| Jul | 67% | 66% | 5.5 | 15:34 |
| Aug | 68% | 60% | 5.0 | 14:14 |
| Sep | 64% | 48% | 4.3 | 12:29 |
| Oct | 64% | 43% | 3.1 | 10:46 |
| Nov | 70% | 48% | 1.9 | 9:14 |
| Dec | 80% | 50% | 1.4 | 8:29 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Longjiang is like
The warmest month is July, with an average high of 30 °C85 °F and a low of 18 °C64 °F. The coldest is January, when highs average −13 °C9 °F and lows −23 °C−10 °F. The climate is extremely continental — the average temperature swings by 41.8 °C75.2 °F between the coldest and the warmest month.
Annual precipitation is moderate at about 491 mm19 in. The wettest three-month stretch is June–August, which brings 66% of the annual total. Months with less than 20 mm0.8 in on average: October–March. The wettest month is July (135 mm5.3 in), the driest is January (4 mm0.1 in).
Relative humidity ranges from 49% in May to 80% in January. The clearest skies (lowest average cloud amount, 43%) are typical of October. Average wind speed near the ground ranges from 8 km/h (5 mph) in August to 13 km/h (8 mph) in April. Daylight lasts from about 8.5 hours in December to 15.9 hours in June.
A lasting snow cover is typical in November–March, when the average snow depth in the reanalysis exceeds 10 cm (deepest in January, about 17 cm).
Best time to visit Longjiang
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May and June and August and September: average highs of 21 °C70 °F to 28 °C82 °F with 43 mm1.7 in to 98 mm3.9 in of precipitation per month.
The most challenging month is January, which is cold, with average highs of −13 °C9 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Longjiang
- Winter (December–February) — highs −139 to −8 °C18 °F, lows −23−10 to −21 °C−5 °F, about 5 mm0.2 in of precipitation a month. Pack heavy insulated clothing, thermal base layers, a warm hat, mittens and insulated boots and an extra layer for the cooler mornings and evenings.
- Spring (March–May) — highs 236 to 22 °C72 °F, lows −1014 to 7 °C45 °F, about 24 mm0.9 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket, an extra layer for the cooler mornings and evenings and shoes with good grip, as frost is common.
- Summer (June–August) — highs 2781 to 30 °C85 °F, lows 1458 to 18 °C64 °F, about 109 mm4.3 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses, an extra layer for the cooler mornings and evenings and an umbrella or light rain jacket.
- Autumn (September–November) — highs −228 to 21 °C70 °F, lows −1112 to 8 °C46 °F, about 26 mm1.0 in of precipitation a month. Pack a warm coat, layers and closed shoes, an extra layer for the cooler mornings and evenings and shoes with good grip, as frost is common.
How Longjiang compares
Compared with Hulan Ergi, about 36 km to the southeast, Longjiang has practically the same average temperature and receives 6% more precipitation (491 mm19 in vs 463 mm18 in). The difference is largest in August (0.6 °C1 °F cooler).
Of the 547 places in China covered by World Climates, Longjiang is the 522nd warmest by annual mean temperature and the 475th wettest by annual precipitation. See all of them on the China climate page.
Places in other countries with the most similar temperature and rainfall pattern: Kyzyl (Russia, BSk), Pavlodar (Kazakhstan, Dfb) and Khakasskaya (Abakan) (Russia, Dfb).
Nearby places
- Hulan Ergi 36 km · 4 °C39 °F · 463 mm18 in
- Qiqihar 58 km · 4 °C39 °F · 483 mm19 in
- Zhalantun 82 km · 3 °C38 °F · 531 mm21 in
- Daqing 160 km · 4 °C39 °F · 481 mm19 in
- Ulanhot 163 km · 5 °C41 °F · 449 mm18 in
- Honggang 165 km · 4 °C40 °F · 481 mm19 in
- Nehe 178 km · 2 °C36 °F · 526 mm21 in
- Baicheng 193 km · 5 °C41 °F · 424 mm17 in
Frequently asked questions
What is the warmest month in Longjiang?
July is the warmest month in Longjiang, with an average high of 30 °C (85 °F) and an average low of 18 °C (64 °F).
What is the coldest month in Longjiang?
January is the coldest month, with an average high of -13 °C (9 °F) and an average low of -23 °C (-10 °F).
When does it rain the most in Longjiang?
July is the wettest month with about 135 mm (5.3 in) of precipitation; January is the driest with about 4 mm (0.1 in).
What is the best time to visit Longjiang?
Judging by long-term averages, the most comfortable months are May and June and August and September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 233 m, while Longjiang lies at about 182 m. Temperatures on this page were therefore adjusted by +0.3 °C0.6 °F using the standard lapse rate of 6.5 °C per 1,000 m.