September Weather in Grong, Norway

Last updated: August 27, 2025

In September, the average temperature in Grong, Norway hovers around 9°C (49°F). Expect a minimum drop to 0°C (33°F), with highs reaching up to 19°C (67°F). This month, you can anticipate 193 mm (7.6 in) of precipitation spread across 19 days, creating a notably high humidity level of 84%.

September Temperature in Grong

In September in Grong, the average temperature is 9°C (49°F). Maximums can reach 19°C (67°F), while minimums can dip as low as 0°C (33°F). It’s a great time to visit Grong for those who enjoy mild weather and the chance to experience seasonal changes.

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

The chart illustrates September temperature patterns in Grong, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grong, September typically has an average temperature of 9°C (49°F), with highs reaching up to 19°C (67°F) and lows dropping to around 0°C (33°F).

Data source: Temperature data for Grong generated using information from the Copernicus Climate Change Service.

September Precipitation in Grong

In Grong in September, the precipitation amount is 193 mm (7.6 in) over a period of 19 days.

September Precipitation Trends in Grong

The chart displays monthly precipitation patterns in Grong, 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 Grong, September typically receives around 193 mm (7.6 inches) of precipitation spread over approximately 19 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Grong

In Grong in September, humidity is 84%. With an average temperature of 9°C (49°F), this humidity feels like a chilly embrace, making travel uncomfortable as the dampness seeps into your clothes and lingers in the air, leaving you feeling cool yet clammy.

September Average Humidity in Grong

This chart illustrates the average monthly humidity levels in Grong, 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 Grong is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Grong

In Grong in September, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Grong, you can check the information here.

Maximum UV Index Levels in Grong for September

The chart shows the monthly maximum UV Index (UVI) for Grong 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 Grong typically reaches 3, which falls under the moderate exposure category.

Data source: Grong 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 Grong Compares to Other Months

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

This table compares monthly weather conditions in Grong, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-3°C (26°F)	161 mm (6.4 inches)	86%	low
February Weather	-4°C (25°F)	110 mm (4.3 inches)	84%	low
March Weather	-1°C (30°F)	169 mm (6.6 inches)	83%	moderate
April Weather	3°C (37°F)	136 mm (5.3 inches)	80%	moderate
May Weather	8°C (46°F)	81 mm (3.2 inches)	75%	moderate
June Weather	13°C (55°F)	122 mm (4.8 inches)	78%	high
July Weather	15°C (58°F)	101 mm (4.0 inches)	79%	high
August Weather	13°C (55°F)	158 mm (6.2 inches)	81%	moderate
September Weather	9°C (49°F)	193 mm (7.6 inches)	84%	moderate
October Weather	5°C (41°F)	144 mm (5.7 inches)	87%	low
November Weather	0°C (33°F)	128 mm (5.0 inches)	86%	low
December Weather	-2°C (28°F)	141 mm (5.5 inches)	85%	low