Climate Insights for Longmen

The climate in Longmen is warm and mild. The average annual temperature is 21°C and approximately 1631mm of precipitation falls per year. Longmen receives a notable amount of rainfall throughout the year, including during its driest month. Longmen is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, September. The coldest months are January, February, December, when temperatures can drop to 9°C.

Temperatures in Longmen vary considerably across the year, with a 24°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 33°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 9°C and an average of 13°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between November and December, with a 5°C shift in average temperatures.

Longmen is a fairly wet location, receiving approximately 1631mm of precipitation annually, which averages out to around 136mm per month. The wettest month is August, averaging 310mm of rainfall. June and May also tend to see above-average precipitation. The driest month is December, with just 37mm. That's 273mm less than August, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Longmen is relatively calm, with an average annual wind speed of 11km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 13km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.

It is currently spring in Longmen, which began on March 20, 2026. Longmen is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 33°C, while the coldest stretch bottoms out in January near 9°C. Summer is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Longmen is during March, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 64mm per month. By contrast, July can be uncomfortably hot with highs reaching 33°C, while January is the coldest period with lows dropping to 9°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Longmen based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.