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Forest Glen, Maryland Weather

Cicadas claim the afternoon. Day 14 of summer. Read this microseason across nine climate regions →

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

Forest Glen, MD
Saturday, July 4 at 5:53 PM
99
°
Mostly Clear
Feels like
105°
Humidity
37%
Wind
2 mph
Sunrise
1:47 AM
Sunset
4:37 PM
Forest Glen, MD
Hour by hour · 24h
24-Hour ForecastForest Glen, MD: 24-hour forecast. Temperatures range from 72 to 99 degrees Fahrenheit with a 31% chance of precipitation at 2 AM.
L 72°H 99°
Forest Glen, MD
7-day forecast
  1. Today
    Jul 4
    Light Rain
    26%
    0.07″
    99°76°—
  2. Sunday
    Jul 5
    Heavy Rain
    52%
    2.2″
    96°72°-3°
  3. Monday
    Jul 6
    Light Showers
    80%
    0.02″
    83°72°-13°
  4. Tuesday
    Jul 7
    Thunderstorm
    80%
    0.53″
    88°69°+5°
  5. Wednesday
    Jul 8
    Rain
    38%
    0.17″
    77°69°-11°
  6. Thursday
    Jul 9
    Overcast
    12%
    —
    91°67°+14°
  7. Friday
    Jul 10
    Light Drizzle
    43%
    0.04″
    90°72°-1°
Forest Glen, MD
Next 24 hours · Hot now
HOT 90°65°85°105°6p12a6a12pnow 99°high 99°low 72°PRECIP %
Forest Glen, MD
Anemometer · 24h winds · from true
NESW
From · True
SW
233° · backing 30°
Direction
SW
233°
Sustained
2
mph
Gust
8
mph
Peak 24h
13
avg 4
Beaufort · 1 · LIGHT AIR
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 4 · pk 13 @ 9:00p
010203040MPHB1B2B3B4B5B6B7B8-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 392SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 30° from the sw.
Forest Glen, MD
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
999.3
-2.2 mb in 3h · falling rapidly · 29.51 inHg
Now
999.3
mb
3h
-2.2
mb
12h
-2.2
mb
24h
-2.5
mb
Regime · STORM
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 999–1003
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1002.8999.2999.2
−24h−18h−12h−6hnow
Deep low still deepening — rough seas, strong wind, persistent rain.
Forest Glen, MD
Air quality
89
AQI
Moderate
↑+36 in 6h

AQI 89 (Moderate), driven by Ozone. AQI up 36 in the last 6 hours — air quality is degrading. Ozone at AQI 78 — 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
8.6μg/m³
PM 10Good
10μg/m³
NO₂Good
2μg/m³
OzoneDRIVERUnhealthy SG
124μg/m³
UV IndexModerate
2.5

What's driving it

Ozone × UV × Sky

Ozone at AQI 78 — peak already passed at 1 PM under clear skies. Levels should ease through evening.

Present
AQI 78
UV peak
2.1 at earlier today
Sky at peak
clear
Projected peak
AQI 78

PM × Wind × Precip

PM2.5 at 8.6 µg/m³, PM10 at 9.5 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.91
Wind
calm
Recent rain
1h 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 TREND50100SATSUNMONTUEWEDTHUFRISAT7-DAY PM2.5 TREND · μg/m³360
Forest Glen, MD
Sky cover · visibility · 24h
Cloud cover
44%
MOSTLY CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
99.7mi
UNLIMITED
99 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
21:53 UTC · Forest Glen, 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
21:53 UTC · Forest Glen, MD · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Forest Glen, MD
Satellite · infrared · animated
Forest Glen, MD
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Forest Glen, MD
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:16 AM
Sunrise
1:47 AM
Daylight
14h 50m
Sunset
4:37 PM
Civil dusk
9:10 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Forest Glen, MD
The moon
Waning Gibbous
78% illuminated
Moonrise
11:00 PM
Moonset
10:12 AM
In sign
♓︎ Pisces
Forest Glen, MD
Microseason
Jul 1–5

Cicadas claim the afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Forest Glen at a glance

  • Today vs. normal: 26°F above the seasonal normal for this latitude
  • Last frost: April 10 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

16-Day Forecast — Forest Glen

  1. Sat99°76°26%
  2. Sun96°72°52%
  3. Mon83°72°80%
  4. Tue88°69°80%
  5. Wed77°69°38%
  6. Thu91°67°12%
  7. Fri90°72°43%
  8. Sat90°69°37%
  9. Sun81°68°22%
  10. Mon80°69°20%
  11. Tue87°66°17%
  12. Wed91°69°33%
  13. Thu94°70°37%
  14. Fri89°73°42%
  15. Sat91°71°44%
  16. Sun88°71°46%

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

Right now in the garden

Peak growing season

As of July 4, 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 — Forest Glen

SPC has placed Forest Glen in the Enhanced Risk category for severe thunderstorms today.

  • TODAYENHEnhanced Risk
  • TOMORROWSLGTSlight Risk
  • DAY 3TSTMGeneral Thunderstorms

Numerous severe storms likely. Tornadoes, large hail, and damaging wind gusts possible across the area. Track NWS warnings if storms develop.

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 185 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

Forest Glen peaks at about 78°F in July and bottoms near 32°F in January; August brings the heaviest rain (4.2 inches) and October the least (2.6 inches).

MonthMean tempPrecipRainy days
January32°3.3″13
February35°2.8″12
March44°3.4″15
April55°3.7″17
May63°3.5″18
June72°3.9″17
July78°3.2″17
August77°4.2″18
September70°3.4″14
October59°2.6″11
November46°3.6″12
December37°3.9″14

Regional context

Drawing on NOAA NCEI 1991-2020 normals, Forest Glen's January averages 32°F and July 78°F — 46°F apart — while precipitation totals roughly 41.5 inches over some 175 days.

Forest Glen's precipitation spreads evenly: August peaks at 4.2 inches on 17.8 wet days, while October holds 2.6 inches over 11.1 — no month dominates Forest Glen's rain calendar. It is a balanced pattern Forest Glen shares with places like Kensington, MD, Silver Spring, MD and South Kensington, MD.

Forest Glen's growing window opens around mid-April, once Forest Glen's overnight lows stop freezing — sow peas, lettuce, spinach, and radishes. Warm-soil crops in Forest Glen wait about two weeks past Forest Glen's last frost, once the soil warms. Around mid-November, freezing nights resume in Forest Glen and tender crops must come in. In Forest Glen, low spots run 4-7°F colder than nearby slopes, nudging Forest Glen's frost dates a week.

Similar climates: Kensington, MD, Silver Spring, MD, South Kensington, MD, Four Corners, MD, Chevy Chase View, MD.

Frequently asked

When does it freeze in Forest Glen?
Frost typically leaves Forest Glen by mid-April and returns to Forest Glen near mid-November.
What is the rainy season in Forest Glen?
August is the wettest month in Forest Glen, about 4.2 inches on average; the year totals roughly 42 inches.
What is the warmest month in Forest Glen?
The warmest stretch in Forest Glen comes in July, around 78°F on average.
What is the coldest month in Forest Glen?
On average January is the chilliest month in Forest Glen, about 32°F.
When can I start a vegetable garden in Forest Glen?
Forest Glen's last frost (mid-April) cues hardy greens; in Forest Glen, hold heat-lovers two weeks past.
How many rainy days does Forest Glen get?
Forest Glen averages about 175 days with measurable rain or snow each year.
What hardiness zone is Forest Glen?
Forest Glen's USDA zone comes from its January mean (32°F); enter the ZIP on the USDA lookup for the number.
What is the 10-day forecast for Forest Glen?
Forest Glen'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 Forest Glen?
See this week's day-by-day rain chances for Forest Glen in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Forest Glen?
Current conditions for Forest Glen and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Forest Glen forecast updated?
The Forest Glen forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Forest Glen?
Today's sunrise and sunset times for Forest Glen 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 Forest Glen?
The next few days in Forest Glen's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Forest Glen's warm-summer humid continental climate in Maryland pairs 32°F Januarys with 78°F Julys, 46°F apart across the seasons.

Across the year, Forest Glen collects about 42 inches of precipitation over roughly 175 days with measurable rain or snow.

The 46°F gap between Forest Glen's summer and winter, at 39.0°N, shapes Forest Glen's frost calendar.

All cities in Maryland →

Silver Spring, MD weather →

ZIP codes in Forest Glen

  • 20910
  • 20902

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.