September weather forecastPhiladelphia, Germany

September

Weather in September

The first month of the autumn, September, is also an enjoyable month in Philadelphia, Germany, with an average temperature fluctuating between 19.8°C (67.6°F) and 11.5°C (52.7°F).

Temperature

The decrease of average high-temperatures is mild in September, with a decline from a warm 25.3°C (77.5°F) in August to an enjoyable 19.8°C (67.6°F). During September, the average low-temperature is a cool 11.5°C (52.7°F).

Humidity

In September, the average relative humidity is 73%.

Rainfall

In Philadelphia, in September, during 10.3 rainfall days, 18mm (0.71") of precipitation is typically accumulated. In Philadelphia, during the entire year, the rain falls for 142 days and collects up to 267mm (10.51") of precipitation.

Snowfall

May through October are months without snowfall in Philadelphia.

Daylight

In September, the average length of the day is 12h and 40min.
On the first day of the month, sunrise is at 06:16 and sunset at 19:51. On the last day of September, sunrise is at 07:04 and sunset at 18:43 CEST.

Sunshine

In Philadelphia, the average sunshine in September is 8.4h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 4 in September translates into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. To guard against the harmful effects of the Sun, minimize exposure during midday. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.

Updated: Feb 9, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In September, in Philadelphia, the average high-temperature is 19.8°C (67.6°F), and the average low-temperature is 11.5°C (52.7°F).

The average relative humidity in September in Philadelphia, Germany, is 73%.

In Philadelphia, Germany, in September, during 10.3 rainfall days, 18mm (0.71") of precipitation is typically accumulated.

May through October are months without snowfall.

In Philadelphia, Germany, the average day length in September is 12h and 40min.

In September, on the first day of the month, sunrise is at 06:16 and sunset at 19:51. On the last day of the month, sunrise is at 07:04 and sunset at 18:43 CEST.

In September, the average sunshine duration in Philadelphia is 8.4h.

The average daily maximum UV index in September in Philadelphia, Germany, is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

25.3°C

19.8°C

13.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

11km/h

11.2km/h

12.6km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

15.2

16.9

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Philadelphia, Germany

Average high temperature in September: 19.8°C

The warmest month (with the highest average high temperature) is August (25.3°C).
The month with the lowest average high temperature is January (2.3°C).

Average low temperature in September: 11.5°C

The month with the highest average low temperature is August (15.2°C).
The coldest month (with the lowest average low temperature) is January (-2°C).

Average pressure in September
Philadelphia, Germany

Average pressure in September: 1017.3mbar

The month with the highest atmospheric pressure is October (1017.4mbar).
The month with the lowest atmospheric pressure is November (1014.3mbar).

Average wind speed in September
Philadelphia, Germany

Average wind speed in September: 10.8km/h

The windiest month (with the highest average wind speed) is December (14.5km/h).
The calmest month (with the lowest average wind speed) is August (10.1km/h).

Average humidity in September
Philadelphia, Germany

Average humidity in September: 73%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is August (67%).

Average rainfall in September
Philadelphia, Germany

Average rainfall in September: 18mm

The wettest month (with the highest rainfall) is July (39mm).
The driest month (with the least rainfall) is April (11mm).

Average rainfall days in September
Philadelphia, Germany

Average rainfall days in September: 10.3 days

The month with the highest number of rainy days is July (14.8 days).
The month with the least rainy days is February (8.8 days).

Average snowfall in September
Philadelphia, Germany

Average snowfall in September: 0mm

The month with the highest snowfall is January (37mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in September
Philadelphia, Germany

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (9 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Philadelphia, Germany

Average daylight in September: 12h and 42min

The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).

Average sunshine in September: 8h and 24min

The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).