Frederick, Maryland Weather
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Climate of Frederick: monthly averages
Based on 25 years of satellite and reanalysis data (2001-2025), July is usually the hottest month in Frederick, with average daytime highs around 31°C. January is the coolest, when nights typically fall to about -6°C and frost is possible on the coldest nights. That is a wide yearly range of roughly 36°C, so the seasons feel very different from each other.
The area receives about 1120 mm of rain in a typical year. Most of it falls from May to July and September to October, and May is the wettest month at roughly 117 mm.
For outdoor plans and travel, August usually offers the most comfortable weather in Frederick, with mild days and relatively little rain.
| Month | Avg high | Avg low | Rainfall | Humidity |
|---|---|---|---|---|
| Jan | 3° | -6° | 69 mm | 84% |
| Feb | 4° | -5° | 68 mm | 83% |
| Mar | 10° | -1° | 83 mm | 80% |
| Apr | 17° | 5° | 94 mm | 77% |
| May | 22° | 11° | 117 mm | 78% |
| Jun | 28° | 16° | 112 mm | 75% |
| Jul | 31° | 19° | 107 mm | 68% |
| Aug | 30° | 18° | 94 mm | 68% |
| Sep | 26° | 14° | 112 mm | 70% |
| Oct | 19° | 7° | 101 mm | 77% |
| Nov | 11° | 1° | 77 mm | 80% |
| Dec | 5° | -3° | 90 mm | 85% |
Source: NASA POWER (MERRA-2 reanalysis), averaged over the roughly 50 km grid area around Frederick. Values describe typical conditions, not a forecast.
About Frederick weather
Frederick is set in Maryland's humid subtropical-to-continental climate along the Chesapeake Bay, about 70 km west of Baltimore. Summers bring hot, humid summers (June–August). The year winds down with cool winters (December–February) with occasional snow. This page shows live, auto-refreshing weather for Frederick: 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
Frederick is about 70 km west of Baltimore, in Maryland.
Frederick 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 Frederick's exact coordinates. No fixed schedule, the page updates whenever you load it.
July is usually the hottest month in Frederick, with average daytime highs of about 31°C and nights around 19°C.
The coldest nights come in January, when the average low is about -6°C and daytime highs reach around 3°C. Frost is possible on clear, calm nights.
Frederick receives about 1120 mm of rain in a typical year. May is the wettest month at roughly 117 mm, and the main rainy period is May to July and September to October.
August usually offers the most comfortable weather in Frederick, with mild daytime temperatures and little rain.
In November Frederick typically sees daytime highs near 11°C and lows near 1°C, with about 77 mm of rain over the month and average humidity around 80%. 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 Frederick is shown at the top of this page and refreshes automatically — see the hourly breakdown below for how it changes through the day.
Frederick'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.