Sanmenxia climate
Sanmenxia (Henan, China) has a monsoon-influenced hot-summer humid continental climate (Köppen Dwa). The average temperature over the year is 14 °C58 °F, and about 602 mm24 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Sanmenxia climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin |
|---|---|---|---|---|
| Jan | 440 | −622 | −131 | 80.3 |
| Feb | 847 | −327 | 337 | 130.5 |
| Mar | 1661 | 235 | 948 | 160.6 |
| Apr | 2374 | 847 | 1660 | 381.5 |
| May | 2984 | 1457 | 2170 | 592.3 |
| Jun | 3392 | 1967 | 2679 | 682.7 |
| Jul | 3493 | 2271 | 2882 | 1184.7 |
| Aug | 3290 | 2169 | 2679 | 1024.0 |
| Sep | 2780 | 1560 | 2170 | 1024.0 |
| Oct | 2169 | 947 | 1558 | 471.8 |
| Nov | 1355 | 134 | 744 | 240.9 |
| Dec | 642 | −424 | 133 | 60.2 |
| Year | 3493 | −622 | 1458 | 60224 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 65% | 53% | 2.5 | 10:04 |
| Feb | 64% | 61% | 3.0 | 10:53 |
| Mar | 56% | 61% | 4.1 | 11:52 |
| Apr | 54% | 64% | 4.9 | 13:01 |
| May | 53% | 68% | 5.3 | 13:58 |
| Jun | 56% | 68% | 5.3 | 14:29 |
| Jul | 67% | 69% | 4.8 | 14:16 |
| Aug | 69% | 68% | 4.3 | 13:27 |
| Sep | 69% | 69% | 3.6 | 12:20 |
| Oct | 68% | 61% | 3.1 | 11:14 |
| Nov | 67% | 53% | 2.6 | 10:17 |
| Dec | 63% | 48% | 2.4 | 9:50 |
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 Sanmenxia is like
The warmest month is July, with an average high of 34 °C93 °F and a low of 22 °C71 °F. The coldest is January, when highs average 4 °C40 °F and lows −6 °C22 °F. Seasons are strongly marked: the warmest month is on average 28.4 °C51.1 °F warmer than the coldest.
Annual precipitation is moderate at about 602 mm24 in. The wettest three-month stretch is July–September, which brings 54% of the annual total. Months with less than 20 mm0.8 in on average: December–March. The wettest month is July (118 mm4.7 in), the driest is December (6 mm0.2 in).
Relative humidity ranges from 53% in May to 69% in September. The clearest skies (lowest average cloud amount, 48%) are typical of December. Average wind speed near the ground ranges from 6 km/h (4 mph) in October to 8 km/h (5 mph) in March. Daylight lasts from about 9.8 hours in December to 14.5 hours in June.
A lasting snow cover is typical in January and February. In those months the average snow depth in the reanalysis exceeds 10 cm. It is deepest in February, at about 10 cm.
Best time to visit Sanmenxia
Based on these averages, the most comfortable months for sightseeing and outdoor activities are April and May and October. Average highs then reach 21 °C69 °F to 29 °C84 °F. Precipitation is 38 mm1.5 in to 59 mm2.3 in per month.
The most challenging month is January, which is cold, with average highs of 4 °C40 °F.
Comfort score: months are ranked by how close they come to an ideal. That means 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 Sanmenxia
- Winter (December–February) — highs 440 to 8 °C47 °F, lows −622 to −3 °C27 °F, about 9 mm0.4 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.
- Spring (March–May) — highs 1661 to 29 °C84 °F, lows 235 to 14 °C57 °F, about 38 mm1.5 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
- Summer (June–August) — highs 3290 to 34 °C93 °F, lows 1967 to 22 °C71 °F, about 96 mm3.8 in of precipitation a month. Pack very light, breathable clothing, a sun hat and plenty of water and an umbrella or light rain jacket.
- Autumn (September–November) — highs 1355 to 27 °C80 °F, lows 134 to 15 °C60 °F, about 58 mm2.3 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
How Sanmenxia compares
The nearest larger place is Yuncheng, about 33 km to the northwest. Compared with it, Sanmenxia has practically the same average temperature. It receives a similar amount of precipitation.
World Climates covers 547 places in China. By annual mean temperature, Sanmenxia is the 326th warmest of them. By annual precipitation, it is the 401st wettest. See all of them on the China climate page.
Some places in other countries have a very similar pattern of temperature and rainfall. The closest matches are Amarillo (United States, BSk), Wichita (United States, Cfa) and Pueblo (United States, BSk).
Nearby places
- Climate in Yuncheng 33 km · 15 °C58 °F · 602 mm24 in
- Climate in Yima 63 km · 14 °C57 °F · 642 mm25 in
- Climate in Changzhi 69 km · 14 °C58 °F · 604 mm24 in
- Climate in Yongji 69 km · 15 °C59 °F · 607 mm24 in
- Climate in Hancheng 103 km · 15 °C59 °F · 572 mm23 in
- Climate in Huayin 106 km · 16 °C60 °F · 725 mm29 in
- Climate in Luoyang 114 km · 16 °C60 °F · 659 mm26 in
- Climate in Jiyuan 132 km · 16 °C60 °F · 628 mm25 in
Frequently asked questions
What is the warmest month in Sanmenxia?
July is the warmest month in Sanmenxia. Its average high is 34 °C (93 °F) and its average low is 22 °C (71 °F).
What is the coldest month in Sanmenxia?
January is the coldest month. Its average high is 4 °C (40 °F) and its average low is -6 °C (22 °F).
When does it rain the most in Sanmenxia?
July is the wettest month with about 118 mm (4.7 in) of precipitation. December is the driest with about 6 mm (0.2 in).
What is the best time to visit Sanmenxia?
Judging by long-term averages, the most comfortable months are April and May and October.
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. The gaps are largest 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 648 m, while Sanmenxia lies at about 385 m. Temperatures on this page were therefore adjusted by +1.7 °C3.1 °F using the standard lapse rate of 6.5 °C per 1,000 m.