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September Weather in Saint James, United States

Last updated: June 24, 2025

In September, the average temperature in Saint James, United States hovers around 22°C (72°F). Expect a refreshing range, with minimums dipping to 8°C (46°F) and maximums peaking at 34°C (94°F). Precipitation is relatively modest, averaging 57 mm (2.2 in) over 6 days, complemented by an average humidity of 68%. Enjoy the climate!

September Temperature in Saint James

In September in Saint James, the average temperature is 22°C (72°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 8°C (46°F). This variety in temperatures makes it essential to pack layers to ensure comfort during your travels.

September Weather in Saint James: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Saint James, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Saint James, September typically has an average temperature of 22°C (72°F), with highs reaching up to 34°C (94°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec333647556675797572584540
Data source: Temperature data for Saint James 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 Saint James

In Saint James in September, the precipitation amount is 57 mm (2.2 in) over a span of 6 days.

September Precipitation Trends in Saint James

The chart displays monthly precipitation patterns in Saint James, 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 Saint James, September typically receives around 57 mm (2.2 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec77901321401778589110571106858
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Saint James

In Saint James in September humidity is 68%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, slightly stifling but still manageable for traveling, creating an atmosphere that encourages leisurely outdoor activities while prompting occasional breaks for refreshment.

September Average Humidity in Saint James

This chart illustrates the average monthly humidity levels in Saint James, 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 Saint James is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%81%80%80%83%83%76%69%68%72%83%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Saint James

In Saint James in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Saint James.

Maximum UV Index Levels in Saint James for September

The chart shows the monthly maximum UV Index (UVI) for Saint James 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 Saint James typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109753
Data source: Saint James 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 Saint James Compares to Other Months

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

This table compares monthly weather conditions in Saint James, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)77 mm (3.0 inches)83%moderate
February Weather2°C (37°F)90 mm (3.6 inches)81%moderate
March Weather9°C (48°F)132 mm (5.2 inches)80%high
April Weather13°C (55°F)140 mm (5.5 inches)80%very high
May Weather19°C (66°F)177 mm (7.0 inches)83%very high
June Weather24°C (75°F)85 mm (3.3 inches)83%extreme
July Weather26°C (79°F)89 mm (3.5 inches)76%extreme
August Weather24°C (76°F)110 mm (4.3 inches)69%very high
September Weather22°C (72°F)57 mm (2.2 inches)68%very high
October Weather15°C (59°F)110 mm (4.3 inches)72%high
November Weather7°C (45°F)68 mm (2.7 inches)83%moderate
December Weather4°C (40°F)58 mm (2.3 inches)86%moderate

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