September weather forecast and climate
Annapolis, MD

A view of Chesapeake Bay at dusk, found in Annapolis, Maryland, with a distant view of the US Naval Academy chapel dome,
A view of Chesapeake Bay at dusk, found in Annapolis, Maryland, with a distant view of the US Naval Academy chapel dome,

What is the temperature in September in Annapolis?

The average high-temperature, in September, is 76.8°F (24.9°C), while the average low-temperature is 62.8°F (17.1°C).

How much does it rain in Annapolis in September?

In Annapolis, during September, the rain falls for 7.8 days and regularly aggregates up to 4.8" (120.9mm) of precipitation.

What is the rainiest month in Annapolis?

The month with the most rainfall is September when the rain falls for 7.8 days and typically aggregates up to 4.8" (120.9mm) of precipitation.
Average temperature in September - Annapolis, MD
  • Average high temperature in September: 24.9°C

The warmest month (with the highest average high temperature) is July (29.9°C).
The month with the lowest average high temperature is January (5.9°C).

  • Average low temperature in September: 17.1°C

The month with the highest average low temperature is July (21.8°C).
The coldest month (with the lowest average low temperature) is January (-1.6°C).

Average rainfall in September - Annapolis, MD
  • Average rainfall in September: 120.9mm

The wettest month (with the highest rainfall) is September (120.9mm).
The driest month (with the lowest rainfall) is February (74.7mm).

Average rainfall days in September - Annapolis, MD
  • Average rainfall days in September: 7.8 days

Months with the highest number of rainy days are March and April (11.2 days).
Months with the lowest number of rainy days are September and October (7.8 days).

Average sea temperature in September - Annapolis, MD
  • Average sea temperature in September: 23.3°C

The best month for swimming (with the highest average sea temperature) is August (25.4°C).
The coldest month (with the lowest average sea temperature) is February (7.3°C).

Average daylight in September / Average sunshine in September - Annapolis, MD
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.9h).
The month with shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 8h

Months with most sunshine are June, July and August (Average sunshine: 9h).
Months with least sunshine are January, November and December (Average sunshine: 5).

Average UV index in September - Annapolis, MD
  • Average UV index in September: 7

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 2).

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