Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
With September's onset, the weather shows a temperature decrease, transitioning from a moderately hot 24.6°C (76.3°F) in August to a refreshing 19°C (66.2°F). Nighttime temperature experiences an average drop to a frosty 7.8°C (46°F) in September.Humidity
In Boli, the average relative humidity in September is 74%.Rainfall
In September, the rain falls for 12.4 days. Throughout September, 33mm (1.3") of precipitation is accumulated. Throughout the year, there are 122.4 rainfall days, and 495mm (19.49") of precipitation is accumulated.Snowfall
Months with snowfall in Boli are January through May, September through December. September is the first month it typically snows. Throughout September, in the average 0.1 snowfall days, it receives 2mm (0.08") of snow. In Boli, during the entire year, snow falls for 50.9 days and aggregates up to 458mm (18.03") of snow.Daylight
In Boli, the average length of the day in September is 12h and 33min.On the first day of the month, sunrise is at 04:38 and sunset at 17:56. On the last day of September, sunrise is at 05:14 and sunset at 17:00 CST.
Sunshine
In Boli, the average sunshine in September is 8.5h.UV index
In Boli, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September in Boli?
How many days does it rain in September?
When does it start snowing?
What is the average length of the day in September?
When are sunrise and sunset in September in Boli?
How long on average sun shines in September in Boli?
What is the UV index reading in September?
Average temperature in September
Boli, China
- Average high temperature in September: 19°C
The warmest month (with the highest average high temperature) is July (26.3°C).
The month with the lowest average high temperature is January (-14.1°C).
- Average low temperature in September: 7.8°C
The month with the highest average low temperature is July (16.1°C).
The coldest month (with the lowest average low temperature) is January (-22.4°C).
Average pressure in September
Boli, China
- Average pressure in September: 1013.3mbar
The month with the highest atmospheric pressure is January (1023.9mbar).
The month with the lowest atmospheric pressure is July (1005.1mbar).
Average wind speed in September
Boli, China
- Average wind speed in September: 10.4km/h
The windiest month (with the highest average wind speed) is April (14.5km/h).
The calmest month (with the lowest average wind speed) is July (8.5km/h).
Average humidity in September
Boli, China
- Average humidity in September: 74%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is April (54%).
Average rainfall in September
Boli, China
- Average rainfall in September: 33mm
The wettest month (with the highest rainfall) is August (112mm).
The driest month (with the least rainfall) is January (3mm).
Average rainfall days in September
Boli, China
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is June (21.2 days).
The month with the least rainy days is January (0.8 days).
Average snowfall in September
Boli, China
- Average snowfall in September: 2mm
The month with the highest snowfall is November (122mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Boli, China
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is March (13.4 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Boli, China
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 30min).
Average sunshine days in September
Boli, China
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is January (26.4 days).
The month with the least sunshine days is June (7.2 days).
Average UV index in September
Boli, China
- Average UV index in September: 3
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in September
Boli, China
- Average cloud cover in September: 29
The month with the most cloud cover is December (Cloud cover 54).
The month with the least cloud cover is October (Cloud cover 28).
Average visibility in September
Boli, China
- Average visibility in September: 9km
The month with the highest visibility is October (10km).
The months with the lowest visibility are January and February (7km).
