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September Weather in St. Peter, Germany

Last updated: August 23, 2025

In September, the average temperature in St. Peter, Germany hovers around 14°C (58°F). Expect a minimum of 2°C (36°F) and a maximum of 28°C (83°F). With 78 mm (3.1 in) of precipitation spread over 11 days, the weather tends to be quite damp, accompanied by a high average humidity of 83%.

September Temperature in St. Peter

In September in St. Peter, the average temperature is 14°C (58°F). The maximum can reach 28°C (83°F) and the minimum can be as low as 2°C (36°F). This makes it an ideal time for travelers looking to enjoy milder weather and comfortable outdoor activities.

September Weather in St. Peter: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in St. Peter, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In St. Peter, September typically has an average temperature of 14°C (58°F), with highs reaching up to 28°C (83°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec323641485463656558504036
Data source: Temperature data for St. Peter generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in St. Peter

In St. Peter in September, the precipitation amount is 78 mm (3.1 in) over the course of 11 days.

September Precipitation Trends in St. Peter

The chart displays monthly precipitation patterns in St. Peter, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In St. Peter, September typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec142118132701581531091027910687184
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in St. Peter

In St. Peter in September, humidity is 83%. With an average temperature of 14°C (58°F), this humidity feels like a thick blanket enveloping you, making exploration feel heavier and sweatier, so be prepared for a slower pace while traveling.

September Average Humidity in St. Peter

This chart illustrates the average monthly humidity levels in St. Peter, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in St. Peter is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec92%89%87%84%80%82%83%80%83%90%89%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in St. Peter

In St. Peter in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in St. Peter, you can refer to this Hourly UV Index in St. Peter.

Maximum UV Index Levels in St. Peter for September

The chart shows the monthly maximum UV Index (UVI) for St. Peter in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in St. Peter typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec235689986421
Data source: St. Peter September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in St. Peter Compares to Other Months

Weather in St. Peter varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in St. Peter, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in St. Peter, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)142 mm (5.6 inches)92%low
February Weather2°C (37°F)118 mm (4.6 inches)89%moderate
March Weather5°C (41°F)132 mm (5.2 inches)87%moderate
April Weather9°C (48°F)70 mm (2.8 inches)84%high
May Weather12°C (54°F)158 mm (6.2 inches)80%very high
June Weather17°C (64°F)153 mm (6.0 inches)82%very high
July Weather18°C (65°F)109 mm (4.3 inches)83%very high
August Weather18°C (65°F)102 mm (4.0 inches)80%very high
September Weather14°C (58°F)78 mm (3.1 inches)83%high
October Weather10°C (50°F)106 mm (4.2 inches)90%moderate
November Weather5°C (41°F)87 mm (3.4 inches)88%low
December Weather2°C (36°F)184 mm (7.3 inches)90%low

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