Guankou climate
Guankou (Hunan, China) has a humid subtropical climate (Köppen Cfa). The average temperature over the year is 18 °C65 °F, and about 1,656 mm65 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Guankou climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 1152 | 134 | 643 | 732.9 | 14 |
| Feb | 1457 | 439 | 948 | 993.9 | 7 |
| Mar | 1965 | 847 | 1356 | 1646.5 | 1 |
| Apr | 2475 | 1457 | 1966 | 1957.7 | 0 |
| May | 2882 | 1966 | 2374 | 2339.2 | 0 |
| Jun | 3086 | 2373 | 2679 | 25710 | 0 |
| Jul | 3290 | 2577 | 2983 | 1797.0 | 0 |
| Aug | 3289 | 2476 | 2883 | 1285.0 | 0 |
| Sep | 2985 | 2069 | 2577 | 903.5 | 0 |
| Oct | 2577 | 1458 | 2067 | 682.7 | 0 |
| Nov | 1966 | 947 | 1457 | 1054.1 | 1 |
| Dec | 1355 | 236 | 846 | 642.5 | 9 |
| Year | 3290 | 134 | 1865 | 1,65665 | 32 |
“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 | 79% | 75% | 1.8 | 10:32 |
| Feb | 80% | 78% | 2.2 | 11:10 |
| Mar | 80% | 78% | 2.8 | 11:55 |
| Apr | 80% | 78% | 3.6 | 12:48 |
| May | 82% | 79% | 4.0 | 13:32 |
| Jun | 85% | 81% | 4.2 | 13:55 |
| Jul | 84% | 72% | 5.2 | 13:46 |
| Aug | 83% | 69% | 4.8 | 13:08 |
| Sep | 81% | 66% | 3.9 | 12:17 |
| Oct | 77% | 64% | 3.1 | 11:26 |
| Nov | 78% | 64% | 2.5 | 10:42 |
| Dec | 75% | 65% | 2.1 | 10:22 |
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 Guankou is like
The warmest month is July, with an average high of 32 °C90 °F and a low of 25 °C77 °F. The coldest is January, when highs average 11 °C52 °F and lows 1 °C34 °F. Seasons are strongly marked: the warmest month is on average 22.4 °C40.4 °F warmer than the coldest.
It is wet, with about 1,656 mm65 in of precipitation per year. The wettest three-month stretch is April–June, which brings 41% of the annual total. The wettest month is June (257 mm10 in), the driest is December (64 mm2.5 in).
Relative humidity ranges from 75% in December to 85% in June. The clearest skies (lowest average cloud amount, 64%) are typical of November. Average wind speed near the ground ranges from 6 km/h (4 mph) in August to 8 km/h (5 mph) in April. Daylight lasts from about 10.4 hours in December to 13.9 hours in June.
Best time to visit Guankou
Based on these averages, the most comfortable months for sightseeing and outdoor activities are October: average highs of 25 °C77 °F to 25 °C77 °F with 68 mm2.7 in to 68 mm2.7 in of precipitation per month.
The most challenging month is June, which is very wet (257 mm10 in) and humid (85% relative humidity).
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 Guankou
- Winter (December–February) — highs 1152 to 14 °C57 °F, lows 134 to 4 °C39 °F, about 78 mm3.1 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket and an extra layer for the cooler mornings and evenings.
- Spring (March–May) — highs 1965 to 28 °C82 °F, lows 847 to 19 °C66 °F, about 198 mm7.8 in of precipitation a month. Pack light layers — T-shirts plus a light sweater or jacket and an umbrella or light rain jacket.
- Summer (June–August) — highs 3086 to 32 °C90 °F, lows 2373 to 25 °C77 °F, about 188 mm7.4 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 1966 to 29 °C85 °F, lows 947 to 20 °C69 °F, about 88 mm3.5 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses.
How Guankou compares
Compared with Changsha, about 64 km to the west, Guankou has practically the same average temperature and receives 6% more precipitation (1,656 mm65 in vs 1,560 mm61 in). The difference is largest in January (0.7 °C1.2 °F warmer).
Of the 547 places in China covered by World Climates, Guankou is the 122nd warmest by annual mean temperature and the 65th 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: Montgomery (United States, Cfa), Jackson (United States, Cfa) and Columbus (United States, Cfa).
Nearby places
- Zhuzhou 59 km · 18 °C65 °F · 1,560 mm61 in
- Pingxiang 64 km · 18 °C65 °F · 1,667 mm66 in
- Changsha 64 km · 18 °C64 °F · 1,560 mm61 in
- Xiangtan 79 km · 18 °C65 °F · 1,560 mm61 in
- Yichun 84 km · 18 °C65 °F · 1,734 mm68 in
- Shaoshan 112 km · 17 °C63 °F · 1,493 mm59 in
- Xiangxiang 117 km · 18 °C65 °F · 1,555 mm61 in
- Heshan 133 km · 18 °C64 °F · 1,442 mm57 in
Frequently asked questions
What is the warmest month in Guankou?
July is the warmest month in Guankou, with an average high of 32 °C (90 °F) and an average low of 25 °C (77 °F).
What is the coldest month in Guankou?
January is the coldest month, with an average high of 11 °C (52 °F) and an average low of 1 °C (34 °F).
When does it rain the most in Guankou?
June is the wettest month with about 257 mm (10.1 in) of precipitation; December is the driest with about 64 mm (2.5 in).
What is the best time to visit Guankou?
Judging by long-term averages, the most comfortable months are 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 — 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 214 m, while Guankou lies at about 79 m. Temperatures on this page were therefore adjusted by +0.9 °C1.6 °F using the standard lapse rate of 6.5 °C per 1,000 m.