Short answer
Two windows are clearly better than the rest. Mid-September to late October brings dry air, 10 to 24°C days, blue skies and the sharpest light of the year. Mid-April to late May is the mirror image: 10 to 26°C, blossom, and the city opening up for summer.
Summer is a season to plan around rather than avoid. July and August run 30 to 33°C with humidity near 80%, and roughly three-quarters of the year's rain falls between June and September. Winter is cold and dry, frequently below freezing, but indoor heating is excellent, prices are lowest and the crowds vanish.
Two things override the charts: public holidays fill every site with domestic travellers, and spring dust storms can close the sky for a day or two in March and April. Air quality has improved substantially over the past decade, and the weakest stretch is now the winter heating season.
Month by month
| Month | Typical high / low | Rain | Crowds | Verdict |
|---|---|---|---|---|
| January | 2°C / -9°C | Almost none | High at Lunar New Year, then low | Coldest and driest, cheap and quiet |
| February | 6°C / -6°C | Very little | High early, then low | Still winter, occasional snow on the Wall |
| March | 13°C / 0°C | 10mm | Low to moderate | Warming fast, but dust and wind arrive |
| April | 21°C / 8°C | 25mm | Moderate; Qingming weekend | One of the two best months |
| May | 27°C / 14°C | 40mm | High 1-5 May | Excellent early, hot and busy late |
| June | 31°C / 19°C | 75mm | Moderate | Long sunny days, humidity climbing |
| July | 32°C / 22°C | 170mm, 13 days | High, school holidays | Wettest and stickiest month |
| August | 31°C / 21°C | 120mm, 11 days | High, school holidays | Hot, humid, afternoon storms |
| September | 27°C / 15°C | 55mm | Rising towards 1 October | Improves sharply after mid-month |
| October | 19°C / 7°C | 25mm | Extreme 1-7 October | Best single month, outside the holiday |
| November | 10°C / -1°C | 13mm | Low | Crisp, clear, cheap, underrated |
| December | 4°C / -7°C | Almost none | Low | Cold, dry, clear, very few visitors |
Annual rainfall comes to roughly 545mm, most of it in four months. These are long-run averages, so treat them as what to pack for rather than a forecast.
Spring, March to May
Spring arrives quickly. March is still coat weather at 0 to 13°C, April jumps to 8 to 21°C, and late May reaches 27°C. The parks are at their best in April, and the Summer Palace earns a full morning.
The drawback is dust. Cold fronts from Mongolia lift Gobi sand and carry it east, usually in March and April. On a bad day the sky turns yellow-brown and visibility drops to a few hundred metres; most years bring a handful of these, and they clear within a day or two. Pollen is heavy in April too, which is hard on anyone with hay fever. Pack layers rather than one heavy coat, plus a scarf, sunglasses and lip balm.
Summer, June to August
June is the pleasant end of summer: 19 to 31°C, long days, about ten hours of sun, and rain that arrives as short squalls. July and August are harder, at 31 to 32°C with humidity moving between 70% and 80%, so walking the Forbidden City or the Wall at midday is genuinely draining.
The rain pattern helps. Beijing storms come as afternoon cloudbursts lasting an hour rather than all-day drizzle, so mornings outdoors and afternoons in a museum works well. Chinese school holidays also run through July and August, which fills the headline sights earlier in the day and lifts hotel rates. Pack light cotton, a compact umbrella and a refillable bottle; public buildings are strongly air-conditioned, so a light layer helps indoors.
Autumn, September to November
The second half of September is when Beijing becomes the city people describe. Humidity breaks in the first cool front, the sky clears and temperatures settle in the low twenties. October averages 7 to 19°C with 25mm of rain across a handful of days, and the low light is the best of the year.
Autumn is also the season for trips out of town. The Great Wall ridge is at its most photogenic as the maples turn, and the air is usually cleanest between rain events. Our day-trips guide covers the timings. The trap is the first week: the National Day holiday runs 1 to 7 October and is the busiest travel week of the Chinese year, with prices, queues and traffic peaking together. Arrive after the 8th and October is the best month of the twelve.
Winter, November to February
Winter here is dry and cold rather than grey and damp. January runs from about -9°C at night to 2°C by day, snow falls on a handful of days in a typical year, and wind on the Great Wall makes it feel much colder than the city. What makes it workable is heating: hotels, restaurants, shops and the metro are all warm.
Winter buys the lowest hotel prices of the year, no queues at the major sites, and a Forbidden City quiet enough to photograph. The trade-off is a short day, with sunset before 5pm, and the heating season's effect on air quality. Pack an insulated coat, gloves, a hat and thermal layers, plus moisturiser for the very dry air.
The holidays that change everything
| Holiday | When | What it means |
|---|---|---|
| Lunar New Year | Late January or February, about a week | The biggest domestic travel event of the year. Trains and flights sell out weeks ahead, and some small restaurants close for several days. |
| Qingming | Early April, three days | A tomb-sweeping long weekend. Moderate crowds, and the first real spring weekend. |
| Labour Day | 1 to 5 May | Very busy. Book the Wall, the Forbidden City and hotels well ahead, and expect resort prices. |
| Dragon Boat | May or June, three days | Short and less disruptive, mostly a domestic family weekend. |
| Mid-Autumn and National Day | 1 to 7 October | The peak week. Every major site sells out in advance, and inter-city trains are the hardest booking of the year. |
Avoid the holiday clusters at the start of January or February, the start of April, the start of May and the start of October, and the rest of the year is more manageable than the crowd stories suggest.
Air quality and dust, honestly
Air quality in Beijing is a different story from a decade ago. Sustained action since the mid-2010s cut fine-particle pollution sharply, and annual averages are now roughly half their worst levels. Clear, deep-blue days are the norm in autumn and increasingly in summer.
Two periods still run worse. The heating season, roughly mid-November to mid-March, is when stagnant air and extra combustion combine, and a handful of days in that window can be hazy. Spring dust is a different phenomenon, with coarser particles and a brown tint. Practical handling: check a live air quality index each morning, put the outdoor headline site on whichever day reads cleanest, and keep a museum as the fallback. Skipping Beijing over air quality is not the proportionate response it was in 2013, but a rigid itinerary is a fragile thing.
Frequently asked questions
What is the best month to visit Beijing?
October, for 7 to 19°C days, clear skies, low humidity and the best light of the year — avoiding 1 to 7 October, when the National Day holiday peaks. November is the quiet, cheap version of the same weather. April is the best of the spring months.
Is summer too hot to sightsee in Beijing?
Hard work rather than impossible. July and August sit at 30 to 33°C with humidity around 70 to 80%, and rain arrives as short intense storms rather than steady drizzle. Start early, take a long indoor break at midday and a second outdoor session in the evening.
How bad are Beijing's winters?
Cold and dry, with January averages from -9°C at night to 2°C by day. Snow is light and infrequent, but wind on the Great Wall makes the chill severe. Indoor heating is excellent everywhere, so the discomfort sits between buildings rather than inside them.
When do the sand storms happen?
Mostly March and April, when cold fronts lift Gobi sand and carry it east. They usually last a day or two and clear. The sky turns yellow-brown and visibility drops, which is a different problem from urban air pollution. A scarf and sunglasses help, and indoor sites are unaffected.
Is air quality in Beijing still a problem?
Less than it was. Fine-particle pollution has dropped substantially since the mid-2010s, and annual averages are roughly half their worst levels. The weaker period is the winter heating season, plus occasional spring dust events. A live index on your phone each morning is the useful tool.
How do the public holidays affect bookings?
Heavily. Over Lunar New Year, 1 to 5 May and 1 to 7 October, inter-city trains and major attractions sell out days or weeks ahead and hotel prices rise sharply. Real-name tickets for the Great Wall and the Forbidden City release on a fixed schedule and go quickly, so book those first.
What should I pack for a spring or autumn trip?
Layers. Spring mornings can be near freezing while afternoons reach the low twenties, and autumn runs from 20°C days to near-zero nights by late November. Comfortable walking shoes matter more than anything else, plus a light waterproof layer and lip balm for the dry air.
Is December a bad time to visit?
No. It is one of the quietest and cheapest months, with clear dry days around 4°C and no crowds. The limits are daylight, with sunset before 5pm, and the occasional hazy spell during the heating season. Indoor sights and a slower pace suit the month.
Related reading
Temperature and rainfall figures follow the 1991-2020 climate normals for Beijing and are long-run averages rather than forecasts. Holiday dates move with the lunar calendar and the State Council's annual notice, so confirm the exact days for your travel year. Air quality statements reflect published official trends rather than any single year.