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September Weather in Halifax, United States

Last updated: June 24, 2025

In Halifax, United States, the average temperature in September is a pleasant 23°C (74°F). However, temperatures can range dramatically, dipping to a chilly 6°C (43°F) at their lowest and soaring up to a scorching 38°C (100°F) at their peak. Expect about 98 mm (3.9 in) of precipitation spread over 9 days, contributing to an average humidity level of 75%. Stay prepared for a mix of weather this month!

September Temperature in Halifax

In September in Halifax, the average temperature is 23°C (74°F). Maximum temperatures can reach up to 38°C (100°F), while minimums can drop as low as 6°C (43°F). This range makes it essential to pack accordingly for your travels, ensuring you are prepared for both warm days and cooler nights.

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

The chart illustrates September temperature patterns in Halifax, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Halifax, September typically has an average temperature of 23°C (74°F), with highs reaching up to 38°C (100°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec414651606976817873644945
Data source: Temperature data for Halifax 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 Halifax

In Halifax in September, the precipitation amount is 98 mm (3.9 in) spread over a duration of 9 days.

September Precipitation Trends in Halifax

The chart displays monthly precipitation patterns in Halifax, 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 Halifax, September typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec73108721201119269109981067596
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Halifax

In Halifax in September, humidity is 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

September Average Humidity in Halifax

This chart illustrates the average monthly humidity levels in Halifax, 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 Halifax is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%84%82%83%83%79%77%75%81%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Halifax

In Halifax 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 Halifax.

Maximum UV Index Levels in Halifax for September

The chart shows the monthly maximum UV Index (UVI) for Halifax 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 Halifax typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679111110109853
Data source: Halifax 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 Halifax Compares to Other Months

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

This table compares monthly weather conditions in Halifax, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)73 mm (2.9 inches)84%moderate
February Weather8°C (46°F)108 mm (4.2 inches)84%high
March Weather11°C (51°F)72 mm (2.8 inches)84%high
April Weather16°C (61°F)120 mm (4.7 inches)82%very high
May Weather21°C (69°F)110 mm (4.3 inches)82%extreme
June Weather24°C (76°F)92 mm (3.6 inches)83%extreme
July Weather27°C (81°F)69 mm (2.7 inches)79%very high
August Weather26°C (79°F)109 mm (4.3 inches)77%very high
September Weather23°C (74°F)98 mm (3.9 inches)75%very high
October Weather18°C (64°F)106 mm (4.2 inches)81%very high
November Weather10°C (50°F)75 mm (3.0 inches)87%moderate
December Weather7°C (45°F)96 mm (3.8 inches)85%moderate

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