Annapolis, Maryland Weather
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Climate of Annapolis: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Annapolis, with average daytime highs around 31°C. January is the coolest, when nights typically fall to about -3°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 34°C, so the seasons feel very different from each other.
The area receives about 1160 mm of rain in a typical year. Most of it falls from May to October (around 57% of the yearly total), and August is the wettest month at roughly 117 mm.
There is no long, mild season here; September usually comes closest to comfortable outdoor weather, with highs near 26°C.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 4° | -3° | 68 mm | 82% |
| Feb | 6° | -2° | 70 mm | 81% |
| Mar | 11° | 1° | 86 mm | 79% |
| Apr | 17° | 7° | 91 mm | 77% |
| May | 23° | 13° | 101 mm | 78% |
| Jun | 28° | 19° | 116 mm | 75% |
| Jul | 31° | 22° | 115 mm | 71% |
| Aug | 30° | 21° | 117 mm | 72% |
| Sep | 26° | 17° | 107 mm | 73% |
| Oct | 20° | 10° | 107 mm | 77% |
| Nov | 13° | 4° | 81 mm | 79% |
| Dec | 7° | 0° | 97 mm | 83% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Annapolis. Values describe typical conditions, not a forecast.
About Annapolis weather
Annapolis sits within Maryland's humid subtropical-to-continental climate along the Chesapeake Bay, about 36 km south of Baltimore. Conditions turn hot with hot, humid summers (June–August). By December, expect cool winters (December–February) with occasional snow. This page shows live, auto-refreshing weather for Annapolis: current conditions, an hourly breakdown, a 16-day outlook, a date-lookup tool for any past or future date, and real-time air quality, sourced from Open-Meteo. Local timezone: America/New_York.
Frequently asked questions
Annapolis is about 36 km south of Baltimore, in Maryland.
Annapolis sees cool winters (December–February) with occasional snow.
The live current conditions, hourly forecast and 16-day outlook above are pulled in real time for Annapolis's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Annapolis, with average daytime highs of about 31°C and nights around 22°C.
The coldest nights come in January, when the average low is about -3°C and daytime highs reach around 4°C. Frost is possible on clear, calm nights.
Annapolis receives about 1160 mm of rain in a typical year. August is the wettest month at roughly 117 mm, and the main rainy period is May to October.
There is no long mild season in Annapolis. September usually comes closest to comfortable outdoor weather.
In November Annapolis typically sees daytime highs near 13°C and lows near 4°C, with about 81 mm of rain over the month and average humidity around 79%. Check the live forecast above for this week's actual conditions.
Up to 16 days ahead using the extended forecast and date picker above; further-out or historical dates use the same date lookup tool.
Live temperature for Annapolis is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Annapolis's day-to-day weather follows the broader pattern of Maryland described above. See the hourly weather forecast or the air quality index for more detail.