Frederick, Maryland Weather
Day 50 of autumn. Read today’s microseason across nine climate regions →
Frederick weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 4:28 PM EST · Open-Meteo
- TodayNov 10Clear——69°37°—
- WednesdayNov 11Clear——66°41°-3°
- ThursdayNov 12Light Rain45%0.07″59°42°-7°
- FridayNov 13Overcast15%—50°32°-9°
- SaturdayNov 14Overcast——48°30°-2°
- SundayNov 15Overcast——50°34°+2°
- MondayNov 16Partly Cloudy——52°31°+2°
Air quality now AQI 55 · Moderate
AQI 55 (Moderate), driven by Ozone. AQI flat over the last 6 hours (within ±3 points). Ozone at AQI 42 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 42 — peak already passed at 1 PM under clear skies. Levels should ease through evening.
- Present
- AQI 42
- UV peak
- 0.2 at earlier today
- Sky at peak
- clear
- Projected peak
- AQI 42
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
When the wind is in the west, the weather is at its best.
- Moonrise
- 8:26 AM
- Moonset
- 5:36 PM
- In sign
- ♐︎ Sagittarius
Frederick at a glance
- Today vs. normal: Today averages 53°F (high 69°F, low 37°F), 4°F above the 49°F normal for Nov 10
- Last frost: April 2 (1991–2020 median, NOAA station 3 km away)
- Microseason: Nov 6–10
- Planting calendar: November — harvest fall brassicas, carrots
16-Day Forecast — Frederick
- Tue69°37°0%
- Wed65°41°2%
- Thu59°42°45%
- Fri50°32°15%
- Sat48°30°2%
- Sun50°34°0%
- Mon52°31°2%
- Tue50°33°3%
- Wed54°32°2%
- Thu54°30°2%
- Fri53°33°4%
- Sat59°36°16%
- Sun64°41°26%
- Mon66°32°33%
- Tue39°27°30%
- Wed40°25°10%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Frederick
Interactive wind and temperature map centered on Frederick — it loads in your browser. Open the full weather map.
Right now in the garden
Post-frost dormancy
As of November 10, the season's first frost (typically November 6) is due or past. Bring frost-tender plants indoors, mulch overwintering beds, and turn spent plantings under. This city's planting calendar for November: harvest fall brassicas and carrots.
Sun & seasons in Frederick
Frederick sits in Frederick County, where the year’s longest day runs 14h 57m of daylight and its shortest just 9h 23m — a swing of +5h 34m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Baltimore, the state’s largest city, lies about 44 miles to the ESE. The nearest town Frederick tracks is Keedysville, roughly 16 miles to the WNW.
Air quality in Frederick
Air quality in Frederick’s county has trended dirtier since 2020; its cleanest year on record was 2020 (median AQI 40). See the full air-quality history for Frederick.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| March | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes | lettuce, spinach, radishes |
| May | tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| June | beans, squash | lettuce, peas, spinach, beans, summer squash, garlic |
| July | tomatoes, peppers, beans, squash | tomatoes, peppers, beans, summer squash, garlic |
| August | beans, squash, fall brassicas, carrots | tomatoes, peppers, beans, summer squash, winter squash |
| September | — | tomatoes, peppers, beans, summer squash, winter squash |
| October | garlic (overwinter) | tomatoes, peppers, beans, summer squash, winter squash, fall brassicas, carrots |
| November | — | fall brassicas, carrots |
A year in weather
The year in Frederick tops out in July (~79°F) and dips lowest in January (~35°F), with September wettest at 5.8 inches and January driest at 2.6 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 35° | 2.6″ | 6 |
| February | 38° | 3.0″ | 5 |
| March | 46° | 3.7″ | 9 |
| April | 57° | 3.5″ | 7 |
| May | 66° | 4.0″ | 7 |
| June | 74° | 4.3″ | 7 |
| July | 79° | 3.9″ | 7 |
| August | 77° | 2.9″ | 5 |
| September | 70° | 5.8″ | 7 |
| October | 58° | 3.3″ | 4 |
| November | 47° | 2.7″ | 5 |
| December | 39° | 4.0″ | 7 |
Regional context
Similar climates Ballenger Creek, MD, Spring Ridge, MD, Bartonsville, MD
By the nearest station's NOAA NCEI 1991-2020 normals, Frederick sees 35°F Januarys and 79°F Julys, a 44°F range, plus around 43.5 inches of precipitation across 76 days.
Rainfall in Frederick splits evenly between the seasons: September tops out at 5.8 inches over 7.3 rainy days, and January logs 2.6 inches across 5.8 — neither half of Frederick's year dominates. It is a balanced pattern Frederick shares with places like Ballenger Creek, MD, Spring Ridge, MD and Bartonsville, MD.
By April 2 the frosts ease in Frederick, opening the season for peas, lettuce, spinach, and radishes. Warm-soil crops in Frederick wait about two weeks past Frederick's last frost, once the soil warms. Around November 6, freezing nights resume in Frederick and tender crops must come in. Sheltered Frederick yards can escape a light frost.
Similar climates: Ballenger Creek, MD, Spring Ridge, MD, Bartonsville, MD, Walkersville, MD, Braddock Heights, MD.
Frequently asked
- When does it freeze in Frederick?
- In Frederick, expect the last spring frost near April 2; Frederick's first autumn frost comes around November 6.
- What is the rainy season in Frederick?
- Frederick sees its heaviest rain in September (around 5.8 inches), part of roughly 44 inches a year.
- What is the warmest month in Frederick?
- The warmest stretch in Frederick comes in July, around 79°F on average.
- What is the coldest month in Frederick?
- On average January is the chilliest month in Frederick, about 35°F.
- When can I start a vegetable garden in Frederick?
- Frost-hardy sowings begin at April 2 in Frederick; warm-season starts follow two weeks on.
- How many rainy days does Frederick get?
- Frederick averages about 76 days with measurable rain or snow each year.
- What hardiness zone is Frederick?
- Frederick sits in the USDA zone set by January lows near 35°F; the USDA ZIP tool gives the band.
- What is the 10-day forecast for Frederick?
- Frederick's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Frederick?
- See this week's day-by-day rain chances for Frederick in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Frederick?
- Current conditions for Frederick and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Frederick forecast updated?
- The Frederick forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Frederick?
- Today's sunrise and sunset times for Frederick are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Frederick?
- The next few days in Frederick's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Frederick sits at 39.4°N; its climate zone is warm-summer humid continental (Köppen approximation).
ZIP codes in Frederick
- 21701
- 21702
- 21703
- 21704
- 21705
- 21709