September Weather in Porcupine, United States

Last updated: June 24, 2025

In September, the average temperature in Porcupine, United States hovers around 18°C (65°F), creating a pleasant climate. However, be prepared for temperature fluctuations, as it can dip to a brisk 1°C (34°F) or rise to a sweltering 39°C (102°F). With 51 mm (2.0 in) of precipitation spread across 7 days, you might encounter some rain. The air remains quite humid, with an average humidity of 72%, adding to the overall atmosphere of the season.

September Temperature in Porcupine

In September in Porcupine, the average temperature is 18°C (65°F). Maximum temperatures can reach 39°C (102°F) while minimums can dip as low as 1°C (34°F). Be prepared for a wide range of temperatures, making it essential to pack accordingly for your travels.

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

The chart illustrates September temperature patterns in Porcupine, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Porcupine, September typically has an average temperature of 18°C (65°F), with highs reaching up to 39°C (102°F) and lows dropping to around 1°C (34°F).

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

September Precipitation in Porcupine

In Porcupine in September, the precipitation amount is 51 mm (2.0 in) over a period of 7 days.

September Precipitation Trends in Porcupine

The chart displays monthly precipitation patterns in Porcupine, 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 Porcupine, September typically receives around 51 mm (2.0 inches) of precipitation spread over approximately 7 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Porcupine

In Porcupine in September humidity is 72%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace, making traveling somewhat uncomfortable as the air clings to your skin and the heat can be stifling, yet it's perfect for enjoying leisurely strolls under the shade.

September Average Humidity in Porcupine

This chart illustrates the average monthly humidity levels in Porcupine, 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 Porcupine is approximately 72%, 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 Porcupine

In Porcupine in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Porcupine.

Maximum UV Index Levels in Porcupine for September

The chart shows the monthly maximum UV Index (UVI) for Porcupine 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 Porcupine typically reaches 8, which falls under the very high exposure category.

Data source: Porcupine 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 Porcupine Compares to Other Months

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

This table compares monthly weather conditions in Porcupine, 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)	18 mm (0.7 inches)	74%	moderate
February Weather	-5°C (23°F)	25 mm (1.0 inches)	79%	moderate
March Weather	3°C (37°F)	59 mm (2.3 inches)	65%	high
April Weather	6°C (44°F)	65 mm (2.6 inches)	69%	very high
May Weather	13°C (56°F)	124 mm (4.9 inches)	75%	very high
June Weather	21°C (70°F)	53 mm (2.1 inches)	84%	extreme
July Weather	24°C (76°F)	61 mm (2.4 inches)	84%	extreme
August Weather	22°C (73°F)	42 mm (1.6 inches)	83%	very high
September Weather	18°C (65°F)	51 mm (2.0 inches)	72%	very high
October Weather	8°C (47°F)	44 mm (1.7 inches)	68%	moderate
November Weather	4°C (39°F)	17 mm (0.7 inches)	75%	moderate
December Weather	-1°C (30°F)	29 mm (1.1 inches)	73%	moderate