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September Weather in Phillipsburg, United States

Last updated: June 24, 2025

In September, the average temperature in Phillipsburg, United States hovers around 26°C (80°F). Temperatures can range from a cool 13°C (56°F) on the lower end to a scorching 38°C (101°F) at the peak. Be prepared for some moisture, as the area receives about 119 mm (4.7 in) of precipitation over 11 days, coupled with an average humidity of 83%.

September Temperature in Phillipsburg

In September in Phillipsburg, the average temperature is 26°C (80°F). Maximums can reach 38°C (101°F), and minimums can be as low as 13°C (56°F). Visitors should be prepared for warm weather, with the possibility of cooler evenings, making it an ideal time for both outdoor adventures and leisurely explorations.

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

The chart illustrates September temperature patterns in Phillipsburg, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Phillipsburg, September typically has an average temperature of 26°C (80°F), with highs reaching up to 38°C (101°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec525862687681828280725954
Data source: Temperature data for Phillipsburg 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 Phillipsburg

In Phillipsburg in September, the total precipitation amount is 119 mm (4.7 in), which occurs over the course of 11 days.

September Precipitation Trends in Phillipsburg

The chart displays monthly precipitation patterns in Phillipsburg, 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 Phillipsburg, September typically receives around 119 mm (4.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec801097993711071231121197651123
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Phillipsburg

In Phillipsburg in September humidity is 83%. With an average temperature of 26°C (80°F), this humidity feels like a warm, enveloping blanket that can make traveling quite uncomfortable; you may find yourself needing frequent breaks for hydration and cool shade as the thick air clings to your skin.

September Average Humidity in Phillipsburg

This chart illustrates the average monthly humidity levels in Phillipsburg, 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 Phillipsburg is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%82%80%76%73%74%80%79%83%77%84%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Phillipsburg

In Phillipsburg in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Phillipsburg.

Maximum UV Index Levels in Phillipsburg for September

The chart shows the monthly maximum UV Index (UVI) for Phillipsburg 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 Phillipsburg typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589101111111110864
Data source: Phillipsburg 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 Phillipsburg Compares to Other Months

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

This table compares monthly weather conditions in Phillipsburg, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (52°F)80 mm (3.1 inches)85%moderate
February Weather14°C (58°F)108 mm (4.3 inches)82%very high
March Weather17°C (62°F)79 mm (3.1 inches)80%very high
April Weather20°C (68°F)93 mm (3.7 inches)76%very high
May Weather24°C (76°F)71 mm (2.8 inches)73%extreme
June Weather27°C (81°F)107 mm (4.2 inches)74%extreme
July Weather28°C (83°F)123 mm (4.8 inches)80%extreme
August Weather28°C (82°F)112 mm (4.4 inches)79%extreme
September Weather26°C (80°F)119 mm (4.7 inches)83%very high
October Weather22°C (72°F)76 mm (3.0 inches)77%very high
November Weather15°C (59°F)51 mm (2.0 inches)84%high
December Weather12°C (55°F)123 mm (4.8 inches)88%moderate

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