September weather forecastSumer, Bulgaria
September
Weather in September
September, the first month of the autumn in Sumer, is also a moderately hot month, with an average temperature ranging between min 13°C (55.4°F) and max 23.8°C (74.8°F).Temperature
Transition from August to September is accompanied by a temperature drop, with average high-temperatures decreasing from 29.1°C (84.4°F) to a still warm 23.8°C (74.8°F). Sumer experiences a consistent average temperature of 13°C (55.4°F) throughout the nights in September.Humidity
The average relative humidity in September is 58%.Rainfall
The months with the least rainfall are August and September Rain falls for 8.8 days and accumulates 27mm (1.06") of rain.Snowfall
May through September are months without snowfall.Daylight
In Sumer, Bulgaria, the average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 06:51 and sunset at 20:01. On the last day of September, in Sumer, sunrise is at 07:23 and sunset at 19:09 EEST.
Sunshine
In September, the average sunshine is 9.4h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: A daily high UV index of 4 in September leads to these guidelines:
Exercise prevention - Precautions against solar damage are endorsed. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sumer, Bulgaria
- Average high temperature in September: 23.8°C
The warmest month (with the highest average high temperature) is August (29.1°C).
The month with the lowest average high temperature is January (2.6°C).
- Average low temperature in September: 13°C
The month with the highest average low temperature is August (16.3°C).
The coldest month (with the lowest average low temperature) is January (-3.4°C).
Average pressure in September
Sumer, Bulgaria
- Average pressure in September: 1017mbar
The month with the highest atmospheric pressure is December (1021mbar).
The months with the lowest atmospheric pressure are May, June and July (1013.9mbar).
Average wind speed in September
Sumer, Bulgaria
- Average wind speed in September: 8.2km/h
The windiest month (with the highest average wind speed) is March (10km/h).
The calmest month (with the lowest average wind speed) is November (7.4km/h).
Average humidity in September
Sumer, Bulgaria
- Average humidity in September: 58%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (54%).
Average rainfall in September
Sumer, Bulgaria
- Average rainfall in September: 27mm
The wettest month (with the highest rainfall) is June (64mm).
The driest months (with the least rainfall) are August and September (27mm).
Average rainfall days in September
Sumer, Bulgaria
- Average rainfall days in September: 8.8 days
The month with the highest number of rainy days is May (18.5 days).
The month with the least rainy days is September (8.8 days).
Average snowfall in September
Sumer, Bulgaria
- Average snowfall in September: 0mm
The month with the highest snowfall is January (141mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Sumer, Bulgaria
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sumer, Bulgaria
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is August (Average sunshine: 11h and 36min).
The months with the least sunshine are January and February (Average sunshine: 5h and 30min).
Average sunshine days in September
Sumer, Bulgaria
- Average sunshine days in September: 19.4 days
The months with the most sunshine days are August and September (19.4 days).
The month with the least sunshine days is June (9.4 days).
Average UV index in September
Sumer, Bulgaria
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Sumer, Bulgaria
- Average cloud cover in September: 25
The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Sumer, Bulgaria
- Average visibility in September: 10km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January and February (8km).
