Short answer
April to May and September to November are the two windows worth planning around. April and May give you full water, green peaks and the mist that makes the karst look like the ink paintings it inspired. September to early November gives the clearest skies, the calmest river of the year, and golden rice on the Longji terraces around the harvest.
If you have to pick one month, October is the safest bet: comfortable temperatures, the lowest rainfall of the year, and long sunshine hours. If you want the misty, atmospheric version, late April and May deliver it, at the cost of carrying a rain jacket everywhere.
Two things matter more than temperature. Water level decides whether your Li River cruise sails the full route, a shortened one, or not at all. And Chinese public holidays decide whether you share the river with a few hundred people or several thousand. Work those two variables before you book flights.
Why water level beats weather
The Li River is a monsoon-fed working river, not a canal. Its level swings hard between the dry season and the summer rains, and that swing governs your trip more than the thermometer does.
High water after heavy rain means brown, fast water, and above a set threshold sailings stop for safety. Low water in winter means the river can be too shallow for the full run, so operators switch to a shortened route with adjusted fares. Both directions cost you the thing you came for.
| Period | River condition | What it means for you |
|---|---|---|
| Apr–May | Full, rising, mostly steady rain | Best all-round window. Green hills, working water, occasional mist |
| Jun–Aug | Flood season. Brown water after downpours | Rafting suspended on short notice. Several days to clear after rain |
| Sep–early Nov | Receding but still workable. Clearest of the year | The photography window. Calm surface, long visibility |
| Mid-Nov–Mar | Dry season. Shallow enough to see the riverbed | Shortened cruise routes. Less colour in the hills |
Note the rainfall pattern. Roughly 70 to 75 per cent of Guilin's annual rain falls between April and August, and June alone is the heaviest month. September and October are the driest.
The months, in a table
Figures below are climate averages reported by weather sources for the Guilin region. Different sources disagree. Annual rainfall is quoted anywhere between about 1,500 mm and 2,200 mm, and monthly temperatures vary by two or three degrees. Treat the shape of the year as reliable and the exact numbers as approximate.
| Month | Typical range | Rain | Verdict |
|---|---|---|---|
| January | Coldest month, roughly 5–13°C | Light, 75–120 mm | Quiet and cheap. Low water, muted hills, occasional mist |
| February | Similar to January, damp | Moderate | The least rewarding month. Grey, cool, and Spring Festival crowds if the holiday falls here |
| March | Warming, around 12–20°C | Rising, 200–230 mm | Shoulder season. Unpredictable, but the landscape is greening fast |
| April | Pleasant, around 16–24°C | Heavy, 290–300 mm | Excellent. Rain usually falls as steady drizzle rather than storms |
| May | Warm, around 20–28°C | Heaviest stretch, 350 mm | Excellent scenery, high humidity. Avoid 1–5 May |
| June | Hot and humid, 24–30°C | Wettest month, around 370 mm | Poor visibility, cancellation risk. The month to skip |
| July | Hottest, 25–32°C, 80%+ humidity | Heavy but shorter bursts | School holidays and oppressive heat. Feels well above the thermometer |
| August | Hot, 25–32°C | Moderate, 145 mm | Still crowded and sticky, though rain eases late in the month |
| September | Warm, 24–31°C | Driest month, around 73 mm | Strong. Humidity drops, visibility improves, rice starts turning gold |
| October | Best all-round, 18–26°C | Very low, 76 mm | The single best month, apart from 1–7 October |
| November | Cool and clear, 13–21°C | Low, around 98 mm | Excellent, with far fewer people. Best value of the good months |
| December | Cool, 7–16°C | Low, 75 mm | Quiet and cheap. Caves stay a steady 18°C, which helps |
The holiday weeks to avoid
China's public holidays are set by the State Council and published as an annual calendar. They matter more than the weather, because tens of millions travel in the same few days and Guilin is a top domestic destination.
| Holiday | 2026 dates | Impact on Guilin |
|---|---|---|
| New Year's Day | 1–3 January | Mild. A long weekend rather than a mass migration |
| Spring Festival | 15–23 February | Nine days, the longest on record. Hotels, trains and cruises all peak |
| Qingming | 4–6 April | Moderate. A short tomb-sweeping break |
| Labour Day | 1–5 May | Severe. One of the two worst windows of the year |
| Dragon Boat | 19–21 June | Minor for this region, but it coincides with the rainy season |
| Mid-Autumn | 25–27 September | Moderate. A three-day break right at the start of the best season |
| National Day | 1–7 October | Severe. Golden Week. The busiest week of the year nationwide |
The practical consequence: if you want October, go in the second half, after Golden Week ends. Late October and all of November give the same clear skies with a fraction of the traffic. Similarly, early May is a write-off, but mid to late May is one of the best periods of the year.
Weekdays are calmer than weekends year round, and that applies to cruise boats and Yulong River raft docks as much as to hotels. For dates beyond 2026, check the official State Council calendar. The holiday schedule is announced annually and adjusted workdays change with it.
What each season is actually good for
Spring, March to May
This is when the landscape fills in. Rice paddies are flooded and mirror-like, and the Longji terraces hold water from roughly mid-May into early June, the reflection season photographers plan around. Rain arrives steadily rather than violently, and fog on still mornings is what makes the Li River look like a painting. It can also sit until midday and hide the peaks. Morning cruises have better odds than afternoon ones.
Summer, June to August
Hot, humid, and frequently hazy. Daytime highs run 32–37°C with humidity above 80 per cent, which pushes the felt temperature well past 36°C. Afternoon downpours are common and can suspend bamboo rafting at short notice, and prolonged rain in the mountains has caused landslides on roads into Longji and Mao'er Mountain. If you are here in summer anyway, work in the early morning and late afternoon, and use the caves as your midday shelter. Reed Flute Cave holds a constant 18°C.
Autumn, September to November
The best of the year, and it is not close. Rainfall drops off after the summer monsoon, humidity falls to around 66–70 per cent, and visibility across the karst stretches for miles. The Longji terraces turn gold as the rice ripens, with the harvest usually in the second half of October. Temperatures suit cycling and hiking, which is exactly what Yangshuo is for. See the Yangshuo cycling routes for what to ride.
Winter, December to February
Cold, damp and quiet. The river drops, some operators run shortened cruise routes with adjusted fares, and the hills lose their green. It is also the cheapest time to come, the crowds are gone, and the mist over the karst has a spare quality some people prefer to the postcard version. Bring layers: the day-to-night temperature gap in autumn and winter often exceeds 10°C.
Frequently asked questions
What is the best month to visit Guilin and Yangshuo?
October. It has the most comfortable temperatures of the year, the lowest rainfall, and long sunshine hours. The one caveat is Golden Week, 1–7 October, the busiest week in China. Go in the second half of the month, or in November.
When is the rainy season?
April to August carries roughly 70 to 75 per cent of the year's rainfall, and June is the heaviest month at around 370 mm. Spring rain is steady drizzle; summer rain comes as short violent downpours, often at night. September and October are the driest.
Can I visit in the summer?
You can, but it is the weakest season for scenery. Humidity and haze cut visibility over the peaks, and heavy rain can suspend rafting and cruises on short notice. If summer is your only option, plan outdoor activity for early morning and use the caves during the hottest hours.
What is winter like?
Cool, damp and overcast, averaging around 9–11°C with lows near 5°C in January. The river drops and some cruises run a shortened route with adjusted fares. It is the quietest and cheapest season, and the misty karst has its own appeal.
When do the Longji rice terraces look best?
Two windows. Mid-May to early June, when the paddies are flooded and mirror the sky. And late September to mid-October, when the rice ripens and the terraces turn gold. Summer is lush green; winter is bare earth and frost.
Should I avoid Chinese public holidays?
Yes, if you can. National Day, 1–7 October 2026, and Labour Day, 1–5 May 2026, are the two worst. Spring Festival, 15–23 February 2026, is nine days and affects transport and hotels nationwide. Mid-Autumn, 25–27 September 2026, is shorter and milder.
Does the Li River cruise run all year?
Year round, but not always the full route. In the dry season, roughly mid-November to March, operators may run a shortened route with adjusted fares. In the flood season, heavy rain can push the river above the safety threshold and sailings are suspended outright. Keep a land fallback ready in May and June.
How much does the weather vary between Guilin and Yangshuo?
Very little. They are about 70 km apart in the same river valley and share one climate pattern. The differences that matter are local: the Yulong valley can be a degree or two cooler than Yangshuo town, and Longji and Mao'er Mountain are colder and wetter than either city.
Related reading
Monthly temperature and rainfall figures are climate averages compiled from public weather sources, which differ between them; annual rainfall is quoted anywhere from about 1,500 mm to 2,200 mm depending on the source and reference period. The 2026 public holiday dates follow the State Council's published calendar. River-level behaviour, cruise route changes and terrace harvest timing follow Guilin scenic-area operator information and independent travel reports, current as of September 2026. Confirm your dates against the official calendar before you book.