New Brunswick weather in September 2025

Expect 19°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in New Brunswick in September. Check more long-term weather averages for New Brunswick in September before you book your next holiday to New Brunswick in 2025/2026.

  • 19°C maximum daytime temperature in September in New Brunswick (Fredericton)19
    19°C max day temperature
  • 6 hours of sunshine per day
  • 11 days with some rainfall in September in New Brunswick (Fredericton)11
    11 days with some rainfall
  • 7°C minimum night-time temperature in September in New Brunswick (Fredericton)7
    7°C min night temperature
  • 12 hours of daylight per day in September in New Brunswick (Fredericton)12
    12 hours of daylight per day
  • No heat & humidity in September in New Brunswick (Fredericton)0
    No heat & humidity
  • 92 mm monthly rainfall in September in New Brunswick (Fredericton)92
    92 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in New Brunswick (Fredericton)5
    5 (Moderate) UV index

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The September weather guide for New Brunswick (Fredericton) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top New Brunswick destinations

Below are average maximum temperatures at popular countries, regions and places in New Brunswick in September. Select a holiday destination to see more weather parameters.

All New Brunswick destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Canada

How hot is it in New Brunswick in September?

Daytime temperatures usually reach 19°C in Fredericton, New Brunswick in September, falling to 7°C at night.

How sunny is it in New Brunswick in September?

There are normally 6 hours of bright sunshine each day in Fredericton, New Brunswick in September - that's 44% of daylight hours.

Does it rain in New Brunswick in September?

There are usually 11 days with some rain in Fredericton, New Brunswick in September and the average monthly rainfall is 92mm.

What is the chance of a hurricane in New Brunswick in September?

On average less than 1 day in September in Fredericton, New Brunswick is likely to be affected by the passage of one or more tropical storms.

New Brunswick September sunrise & sunset times

Browse the sunrise and sunset times for New Brunswick in September 2025. Select a month to view New Brunswick sunrise and sunset times for the next 12 months. The New Brunswick sunrise and sunset times shown below are for Fredericton.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:48 19:04
Monday, 15th September 2025 06:05 18:37
Tuesday, 30th September 2025 06:24 18:08

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