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Frederick, Maryland Weather

Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →

Frederick weather forecast — hour by hour, 7-day outlook, NOAA radar

Frederick, MD
Sunday, July 5 at 6:17 PM
94
°
Mostly Clear
Feels like
97°
Humidity
44%
Wind
9 mph
Sunrise
1:48 AM
Sunset
4:39 PM
Frederick, MD
Hour by hour · 24h
24-Hour ForecastFrederick, MD: 24-hour forecast. Temperatures range from 73 to 94 degrees Fahrenheit with a 57% chance of precipitation at 10 PM.
L 73°H 94°
Frederick, MD
7-day forecast
  1. Today
    Jul 5
    Heavy Rain
    57%
    0.48″
    95°71°—
  2. Monday
    Jul 6
    Rain
    39%
    0.37″
    88°73°-7°
  3. Tuesday
    Jul 7
    Drizzle
    53%
    0.08″
    75°65°-13°
  4. Wednesday
    Jul 8
    Light Drizzle
    30%
    0.04″
    72°64°-3°
  5. Thursday
    Jul 9
    Drizzle
    59%
    —
    91°67°+19°
  6. Friday
    Jul 10
    Light Drizzle
    38%
    —
    85°70°-6°
  7. Saturday
    Jul 11
    Overcast
    24%
    —
    83°68°-2°
Frederick, MD
Next 24 hours · Hot now
HOT 90°68°83°98°6p12a6a12pnow 94°high 94°low 73°PRECIP %
Frederick, MD
Anemometer · 24h winds · from true
NESW
From · True
SE
129° · backing 129°
Direction
SE
129°
Sustained
9
mph
Gust
12
mph
Peak 24h
20
avg 3
Beaufort · 3 · GENTLE BRZ
0
CALM
<1
1
LIGHT AIR
1–3
2
LIGHT BRZ
4–7
3
GENTLE BRZ
8–12
4
MOD BRZ
13–18
5
FRESH BRZ
19–24
6
STRONG BRZ
25–31
7
NEAR GALE
32–38
24h · sust vs gust · mph
avg 3 · pk 20 @ 10:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 223SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 129° from the se.
Frederick, MD
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
998.6
-2.0 mb in 3h · falling · 29.49 inHg
Now
998.6
mb
3h
-2.0
mb
12h
-2.4
mb
24h
-2.2
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 999–1003
9909951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1002.8998.7998.7
−24h−18h−12h−6hnow
Deep low still deepening — rough seas, strong wind, persistent rain.
Frederick, MD
Air quality
81
AQI
Moderate
↑+44 in 6h

AQI 81 (Moderate), driven by Ozone. AQI up 44 in the last 6 hours — air quality is degrading. Ozone at AQI 68 — 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.

PM 2.5Good
12.0μg/m³
PM 10Good
13μg/m³
NO₂Good
2μg/m³
OzoneDRIVERUnhealthy SG
118μg/m³
UV IndexLow
0.8

What's driving it

Ozone × UV × Sky

Ozone at AQI 68 — peak already passed at 1 PM under clear skies. Levels should ease through evening.

Present
AQI 68
UV peak
0.6 at earlier today
Sky at peak
clear
Projected peak
AQI 68

PM × Wind × Precip

PM2.5 at 12.0 µg/m³, PM10 at 12.8 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.94
Wind
light
Recent rain
0h in last 6h
Pattern
background

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).

7-DAY AQI TREND50100SUNMONTUEWEDTHUFRISATSUN7-DAY PM2.5 TREND · μg/m³310
Frederick, MD
Sky cover · visibility · 24h
Cloud cover
28%
MOSTLY CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
86.0mi
UNLIMITED
98 mi0 mi−24h−18h−12h−6hnow
Earth · GOES-19 ABI
Full Disk · Visible · GeoColor
GOES-19 full disk Visible · GeoColor
True-color daytime, blue/IR sandwich at night
22:17 UTC · Frederick, MD · NOAA NESDIS / STAR · up to 10848 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
22:17 UTC · Frederick, MD · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Frederick, MD
Satellite · infrared · animated
Frederick, MD
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Frederick, MD
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:17 AM
Sunrise
1:48 AM
Daylight
14h 51m
Sunset
4:39 PM
Civil dusk
9:13 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Frederick, MD
The moon
Waning Gibbous
69% illuminated
Moonrise
11:26 PM
Moonset
11:19 AM
In sign
♓︎ Pisces
Frederick, MD
Microseason
Jul 1–5

Cicadas claim the afternoon

fish
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Frederick at a glance

  • Today vs. normal: 22°F above the seasonal normal for this latitude
  • Last frost: April 13 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP codes: 21701, 21702, 21703, 21704, 21705

16-Day Forecast — Frederick

  1. Sun95°71°57%
  2. Mon88°73°39%
  3. Tue75°65°53%
  4. Wed72°64°30%
  5. Thu91°67°59%
  6. Fri85°70°38%
  7. Sat83°68°24%
  8. Sun81°69°26%
  9. Mon88°66°26%
  10. Tue70°63°15%
  11. Wed76°65°14%
  12. Thu82°61°27%
  13. Fri86°64°27%
  14. Sat85°64°27%
  15. Sun80°67°27%
  16. Mon74°67°31%

Forecast data from Open-Meteo (CC BY 4.0).

Live wind & temperature near Frederick

Right now in the garden

Peak growing season

As of July 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.

SPC Convective Outlook

Storm Prediction Center — Frederick

SPC has placed Frederick in the Slight Risk category for severe thunderstorms today.

  • TODAYSLGTSlight Risk
  • TOMORROWMRGLMarginal Risk
  • DAY 3TSTMGeneral Thunderstorms

Scattered severe storms possible. A few tornadoes, hail, and damaging wind gusts possible.

Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.

January 1–5: The year turns in silence.January 6–10: Ice thickens on still water.January 11–15: Shortest shadows lengthen.January 16–20: Pheasants begin to call.January 21–25: Springs begin to thaw.January 26–31: Chickadees announce dawn.February 1–5: East wind softens the frost.February 6–10: Sap begins to rise.February 11–15: First snowdrops appear.February 16–20: Red-winged blackbirds return.February 21–25: Rain begins to replace snow.February 26–28: Skunk cabbage pushes through ice.March 1–5: Ice withdraws from the reservoir.March 6–10: Crocuses open to weak sun.March 11–15: Peepers call from the marsh.March 16–20: Woodcocks spiral at dusk.March 21–25: Equinox — light overtakes dark.March 26–31: Forsythia opens along the fences.April 1–5: Cherry blossoms drift like snow.April 6–10: Warblers appear in the understory.April 11–15: Magnolias bloom and fall in a day.April 16–20: Dogwoods float above the forest.April 21–25: Lilacs perfume the evening.April 26–30: Last frost releases the garden.May 1–5: Warblers flood the Ramble.May 6–10: Tulip poplars light their candles.May 11–15: Shad run up the rivers.May 16–20: Roses open along the stoops.May 21–25: Firefly scouts appear at dusk.May 26–31: Strawberries ripen in the sun.June 1–5: Fireflies rise from the lawn.June 6–10: Elderflowers open in hedgerows.June 11–15: Solstice approaches — longest light.June 16–20: Honeysuckle sweetens the night.June 21–25: Solstice — the sun stands still.June 26–30: Lightning bugs drift through oaks.July 1–5: Cicadas claim the afternoon.July 6–10: Queen Anne's lace lines the roads.July 11–15: Thunder builds each afternoon.July 16–20: Corn reaches for the tassels.July 21–25: Dog days settle in the haze.July 26–31: Katydids begin their chorus.August 1–5: Night falls a minute earlier.August 6–10: Sunflowers face the morning.August 11–15: Goldenrod begins to bloom.August 16–20: Crickets pulse through warm nights.August 21–25: First cool morning surprises.August 26–31: Monarchs stage for flight.September 1–5: School buses reappear.September 6–10: Asters purple the roadsides.September 11–15: Hawk migration over the Hudson.September 16–20: Equinox — dark overtakes light.September 21–25: Apples hang heavy on the branch.September 26–30: Geese begin to chevron south.October 1–5: Witch hazel blooms as others fade.October 6–10: Maples begin to blaze.October 11–15: Frost paints the garden black.October 16–20: Oaks turn bronze and russet.October 21–25: Leaves rattle down the gutters.October 26–31: Clocks fall back — dusk at five.November 1–5: Ginkgos drop overnight.November 6–10: Last leaves cling stubbornly.November 11–15: Juncos arrive from the north.November 16–20: Bare branches reveal the sky.November 21–25: First flurries dust the rooftops.November 26–30: Woodsmoke curls through the block.December 1–5: Darkness settles before dinner.December 6–10: Holly and winterberry persist.December 11–15: Shortest day approaches.December 16–20: Ice begins to form at the edges.December 21–25: Solstice — the sun begins return.December 26–31: The year turns in silence.🌱February 14 — First skunk-cabbage spathes thaw their way up☀️March 20 — Spring equinox — day and night balance🌸April 5 — Cherry blossoms peak in the parks🐦May 10 — Warbler migration peaks along the coast✨May 25 — First fireflies scout the meadows at dusk🌞June 21 — Summer solstice — longest day🦗July 25 — Peak cicada chorus in the afternoons🌊August 18 — Warmest sea-surface temperatures of the year🍂September 22 — Autumn equinox — the slow turn❄️October 25 — First widespread frost in the suburbs🍁November 10 — Peak leaf color across the Hudson Valley🌙December 21 — Winter solstice — longest night

Microseason · July 1–5

Cicadas claim the afternoon

Annual cicada buzz begins, peaking in the heat of the day.

Day 186 of 365 · Wedge 37 of 72

The solar year drawn as a wheel of 72 five-day windows. Each wedge is one microseason; the four colored arcs mark winter, spring, summer, and autumn; the small icons sit at notable phenological events. The crimson pointer creeps clockwise as the year turns.

Planting calendar

MonthPlantHarvest
January——
February——
March——
Aprillettuce, peas, spinach, radishes—
Maylettuce, peas, spinach, radishes, tomatoes, peppers, beans, squashlettuce, peas, radishes
Junetomatoes, peppers, beans, squashlettuce, peas, radishes
Julytomatoes, peppers, beans, squashtomatoes, beans, summer squash
August—tomatoes, beans, summer squash
Septemberfall brassicas, garlic (overwinter), carrotstomatoes, beans, summer squash
Octoberfall brassicas, garlic (overwinter), carrotswinter squash, tomatoes (last)
November——
December——

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.

MonthMean tempPrecipRainy days
January35°2.6″6
February38°3.0″5
March46°3.7″9
April57°3.5″7
May66°4.0″7
June74°4.3″7
July79°3.9″7
August77°2.9″5
September70°5.8″7
October58°3.3″4
November47°2.7″5
December39°4.0″7

Regional context

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 stays even across the calendar: September tops out at 5.8 inches over 7.3 rainy days, and January still logs 2.6 inches across 5.8 — a narrow range for Frederick. It is a balanced pattern Frederick shares with places like Ballenger Creek, MD, Spring Ridge, MD and Bartonsville, MD.

By mid-April 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 mid-November, freezing nights resume in Frederick and tender crops must come in. Within Frederick, cold-air pooling chills low spots by 5-10°F, shifting Frederick's local frost dates.

Similar climates: Ballenger Creek, MD, Spring Ridge, MD, Bartonsville, MD, Walkersville, MD, Braddock Heights, MD.

Naturalist notes

Late May brings the distinctive calls of wood thrushes echoing through Frederick's woodlands as these migrants establish breeding territories.

June marks peak blooming season for elderberry shrubs, their flat-topped white flower clusters attracting numerous pollinators throughout the area.

Frequently asked

When does it freeze in Frederick?
In Frederick, expect the last spring frost near mid-April; Frederick's first autumn frost comes around mid-November.
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 mid-April 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.

Climate

Frederick, Maryland occupies a warm-summer humid continental zone, with January means near 35°F and July around 79°F — a 44°F swing.

Frederick sees close to 44 inches of precipitation annually, falling across some 76 wet days.

At 39.4°N, Frederick's 44°F summer-to-winter swing sets when Frederick's gardens wake and when frost returns.

All cities in Maryland →

Washington, DC weather →

ZIP codes in Frederick

  • 21705
  • 21702
  • 21701
  • 21709

Climate normals from the Open-Meteo Climate API. Köppen approximation from NOAA NCEI U.S. Climate Regions. See methodology for data sources, editorial rules, and corrections. Maintainer: Brian Tighe.