Shiyan weather in September
In September, Shiyan has an average high of 27 °C81 °F and an average low of 17 °C63 °F, with about 100 mm3.9 in of precipitation. It is the 4th warmest month of the year and ranks 4th for precipitation.
How September compares with other months
Compared with August, September is 4.8 °C8.7 °F cooler on average and drier by 36 mm1.4 in. Compared with October, September is 5.6 °C10 °F warmer on average and wetter by 27 mm1.1 in. Daylight lasts about 12.3 hours around the middle of the month. Average relative humidity is 76% and the average cloud amount 75%.
Is September a good time to visit Shiyan?
September is not among the most comfortable months by our comfort score: it is fairly wet (100 mm3.9 in) and it is humid (76%). The most comfortable months in Shiyan are March and April and October.
What to wear in September
For Shiyan in September, pack light summer clothes such as T-shirts, shorts or light dresses, an extra layer for the cooler mornings and evenings and an umbrella or light rain jacket.
September in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Shiyan | 2781 | 1763 | 1003.9 |
| Laohekou | 2883 | 1864 | 863.4 |
| Dengzhou | 2883 | 1763 | 863.4 |
| Xiangyang | 2984 | 1864 | 853.3 |
| Shangluo | 2578 | 1458 | 1375.4 |
| Ankang | 2985 | 1865 | 1696.7 |
| Nanyang | 2882 | 1763 | 923.6 |
| Tanghe | 2882 | 1763 | 873.4 |
| Wushan | 2984 | 1966 | 1425.6 |
Nearby places that are more than 1 °C1.8 °F warmer in September: Ankang and Wushan; cooler: Shangluo.
Other months in Shiyan
- January8 °C46 °F / −2 °C28 °F
- February11 °C52 °F / 0 °C33 °F
- March18 °C64 °F / 5 °C41 °F
- April24 °C75 °F / 11 °C51 °F
- May28 °C83 °F / 16 °C60 °F
- June32 °C90 °F / 21 °C69 °F
- July34 °C93 °F / 23 °C74 °F
- August32 °C90 °F / 22 °C72 °F
- September27 °C81 °F / 17 °C63 °F
- October22 °C72 °F / 11 °C53 °F
- November16 °C60 °F / 5 °C41 °F
- December9 °C49 °F / −1 °C31 °F
Frequently asked questions
How warm is Shiyan in September?
In September the average high in Shiyan is 27 °C (81 °F) and the average low is 17 °C (63 °F).
Does it rain a lot in Shiyan in September?
On average about 100 mm (3.9 in) of precipitation falls in September; it ranks 4th of the 12 months.
Is September the warmest month in Shiyan?
No. The warmest month in Shiyan is July, with an average high of 34 °C (93 °F). The coldest month is January, with an average low of -2 °C (28 °F).
How long is the day in Shiyan in September?
In the middle of September the day in Shiyan lasts about 12.3 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Shiyan in September?
The average relative humidity in September is about 76%. Combined with warm days, it can feel muggy.
How cloudy is Shiyan in September?
On average about 75% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
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 689 m, while Shiyan lies at about 247 m. Temperatures on this page were therefore adjusted by +2.9 °C5.2 °F using the standard lapse rate of 6.5 °C per 1,000 m.