Baltimore weather in September 2025

Expect daytime maximum temperatures of 79°F in Baltimore, Maryland in September based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 3.6 inches of rainfall in the month.

  • 79°F maximum daytime temperature in September in Baltimore79
    79°F max day temperature
  • 7 hours of sunshine per day
  • 7 days with some rainfall in September in Baltimore7
    7 days with some rainfall
  • 61°F minimum night-time temperature in September in Baltimore61
    61°F min night temperature
  • 12 hours of daylight per day in September in Baltimore12
    12 hours of daylight per day
  • Low heat & humidity in September in BaltimoreL
    Low heat & humidity
  • 3.6 inches monthly rainfall in September in Baltimore3.6
    3.6 inches of monthly rainfall
  • UV (maximum) index 7 (High) in September in Baltimore7
    7 (High) UV index
  • 72°F sea temperature in September in Baltimore72
    72°F sea temperature

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The September weather guide for Maryland (Baltimore) 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.

Metric (°C)  |  Imperial (°F)

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How hot is it in Baltimore in September?

Daytime temperatures usually reach 79°F in Baltimore in September with low heat and humidity, falling to 61°F at night.

How sunny is it in Baltimore in September?

There are normally 7 hours of bright sunshine each day in Baltimore in September - that's 60% of daylight hours.

How warm is the sea around Baltimore in September?

The average sea temperature around Baltimore in September is 72°F.

Does it rain in Baltimore in September?

There are usually 7 days with some rain in Baltimore in September and the average monthly rainfall is 3.6 inches.

What is the chance of a hurricane in Baltimore in September?

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

Baltimore September sunrise & sunset times

Browse the sunrise and sunset times for Baltimore in September 2025. Select a month to view Baltimore sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:35 18:37
Monday, 15th September 2025 05:48 18:14
Tuesday, 30th September 2025 06:02 17:50

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