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September Weather in Massena, United States

Last updated: June 24, 2025

In Massena, United States, the average temperature in September is a comfortable 17°C (62°F). However, be prepared for a range of temperatures, as the minimum can drop to 0°C (32°F) while the maximum can soar to 32°C (91°F). Expect some moisture in the air with an average precipitation of 72 mm (2.8 in) spread over 9 days, and a humidity level of 72% that can make the air feel quite damp.

September Temperature in Massena

In September in Massena, the average temperature is 17°C (62°F). Maximums can reach 32°C (91°F), and minimums can dip as low as 0°C (32°F). This climate makes Massena a versatile destination for travelers, offering a mix of warm days and cooler nights ideal for outdoor activities.

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

The chart illustrates September temperature patterns in Massena, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Massena, September typically has an average temperature of 17°C (62°F), with highs reaching up to 32°C (91°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec192130445766727062503525
Data source: Temperature data for Massena 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 Massena

In Massena in September, the precipitation amount is 72 mm (2.8 in) over the course of 9 days.

September Precipitation Trends in Massena

The chart displays monthly precipitation patterns in Massena, 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 Massena, September typically receives around 72 mm (2.8 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec83838812011199118977213910585
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Massena

In Massena in September humidity is 72%. With an average temperature of 17°C (62°F), this humidity feels like a warm embrace, making it perfect for leisurely strolls but potentially heavy on the skin, prompting travelers to seek shade during midday excursions.

September Average Humidity in Massena

This chart illustrates the average monthly humidity levels in Massena, 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 Massena is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%86%82%75%68%69%67%72%83%88%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Massena

In Massena in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Massena.

Maximum UV Index Levels in Massena for September

The chart shows the monthly maximum UV Index (UVI) for Massena 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 Massena typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245899987532
Data source: Massena 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 Massena Compares to Other Months

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

This table compares monthly weather conditions in Massena, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-7°C (19°F)83 mm (3.3 inches)93%low
February Weather-6°C (22°F)83 mm (3.3 inches)93%moderate
March Weather-1°C (30°F)88 mm (3.5 inches)86%moderate
April Weather6°C (44°F)120 mm (4.7 inches)82%very high
May Weather14°C (57°F)110 mm (4.3 inches)75%very high
June Weather19°C (66°F)99 mm (3.9 inches)68%very high
July Weather22°C (72°F)118 mm (4.6 inches)69%very high
August Weather21°C (70°F)97 mm (3.8 inches)67%very high
September Weather17°C (62°F)72 mm (2.8 inches)72%high
October Weather10°C (51°F)139 mm (5.5 inches)83%moderate
November Weather2°C (36°F)105 mm (4.1 inches)88%moderate
December Weather-4°C (26°F)85 mm (3.3 inches)89%low

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