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September Weather in Bo, Norway

Last updated: August 27, 2025

In Bo, Norway during the month of September, the average temperature hovers around 10°C (51°F). You can expect minimums to dip to 0°C (33°F), while the maximum can reach a pleasant 24°C (75°F). Precipitation is noteworthy, with an average of 134 mm (5.3 in) spread over 14 days. Don't forget to account for the high humidity levels, averaging around 86%, making the air feel quite moist during your stay!

September Temperature in Bo

In September in Bo, the average temperature is 10°C (51°F), with maximums reaching 24°C (75°F) and minimums dropping as low as 0°C (33°F). This variation makes it advisable for travelers to pack layers to stay comfortable throughout the day.

September Weather in Bo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Bo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bo, September typically has an average temperature of 10°C (51°F), with highs reaching up to 24°C (75°F) and lows dropping to around 0°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec252530384858605751423427
Data source: Temperature data for Bo 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 Bo

In Bo in September, the total precipitation amount is 134 mm (5.3 in) over the course of 14 days.

September Precipitation Trends in Bo

The chart displays monthly precipitation patterns in Bo, 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 Bo, September typically receives around 134 mm (5.3 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec7176814486107113100134140116126
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Bo

In Bo in September humidity is 86%. With an average temperature of 10°C (51°F), this humidity feels like a cool, damp blanket enveloping you, making traveling feel invigorating yet slightly uncomfortable without the right layers.

September Average Humidity in Bo

This chart illustrates the average monthly humidity levels in Bo, 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 Bo is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%91%88%83%75%74%74%78%86%92%92%92%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bo

In Bo in September, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Bo for better planning.

Maximum UV Index Levels in Bo for September

The chart shows the monthly maximum UV Index (UVI) for Bo 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 Bo typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123467754211
Data source: Bo 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 Bo Compares to Other Months

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

This table compares monthly weather conditions in Bo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)71 mm (2.8 inches)93%low
February Weather-4°C (26°F)76 mm (3.0 inches)91%low
March Weather-1°C (30°F)81 mm (3.2 inches)88%moderate
April Weather3°C (38°F)44 mm (1.7 inches)83%moderate
May Weather9°C (48°F)86 mm (3.4 inches)75%high
June Weather14°C (58°F)107 mm (4.2 inches)74%high
July Weather16°C (61°F)113 mm (4.5 inches)74%high
August Weather14°C (57°F)100 mm (3.9 inches)78%moderate
September Weather10°C (51°F)134 mm (5.3 inches)86%moderate
October Weather5°C (42°F)140 mm (5.5 inches)92%low
November Weather1°C (34°F)116 mm (4.6 inches)92%low
December Weather-3°C (27°F)126 mm (5.0 inches)92%low

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