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September Weather in Roa, Norway

Last updated: August 27, 2025

In September, the average temperature in Roa, Norway hovers around 11°C (52°F), with minimums dropping to 0°C (32°F) and maximums reaching 23°C (74°F). Expect about 102 mm (4.0 in) of precipitation spread over 13 days, contributing to a high average humidity of 91%.

September Temperature in Roa

In September in Roa, the average temperature is 11°C (52°F). The maximum can reach 23°C (74°F), and the minimum can be as low as 0°C (32°F). This climate makes Roa an ideal destination for travelers who enjoy mild temperatures and outdoor activities during this time of year.

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

The chart illustrates September temperature patterns in Roa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Roa, September typically has an average temperature of 11°C (52°F), with highs reaching up to 23°C (74°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec242531384959615851423426
Data source: Temperature data for Roa 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 Roa

In Roa in September, precipitation amounts to 102 mm (4.0 in) over the course of 13 days.

September Precipitation Trends in Roa

The chart displays monthly precipitation patterns in Roa, 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 Roa, September typically receives around 102 mm (4.0 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec58596342949510310810212598101
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Roa

In Roa in September, humidity is 91%. With an average temperature of 11°C (52°F), this humidity feels like a damp chill that clings to your skin, making it essential to dress in layers and plan for cozy indoor activities rather than lengthy outdoor explorations.

September Average Humidity in Roa

This chart illustrates the average monthly humidity levels in Roa, 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 Roa is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec98%95%92%88%84%82%82%87%91%95%97%98%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Roa

In Roa 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 Roa for better planning.

Maximum UV Index Levels in Roa for September

The chart shows the monthly maximum UV Index (UVI) for Roa 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 Roa typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec113457754211
Data source: Roa 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 Roa Compares to Other Months

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

This table compares monthly weather conditions in Roa, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (24°F)58 mm (2.3 inches)98%low
February Weather-4°C (25°F)59 mm (2.3 inches)95%low
March Weather-1°C (31°F)63 mm (2.5 inches)92%moderate
April Weather4°C (39°F)42 mm (1.6 inches)88%moderate
May Weather9°C (49°F)94 mm (3.7 inches)84%moderate
June Weather15°C (59°F)95 mm (3.7 inches)82%high
July Weather16°C (62°F)102 mm (4.0 inches)82%high
August Weather15°C (58°F)108 mm (4.2 inches)87%moderate
September Weather11°C (52°F)102 mm (4.0 inches)91%moderate
October Weather6°C (42°F)125 mm (4.9 inches)95%low
November Weather1°C (34°F)98 mm (3.8 inches)97%low
December Weather-3°C (26°F)101 mm (4.0 inches)98%low

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