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Kemp Mill, Maryland Weather

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

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

Kemp Mill, MD
Saturday, July 4 at 8:30 PM
85
°
Overcast
Feels like
91°
Humidity
70%
Wind
12 mph
Sunrise
1:47 AM
Sunset
4:37 PM
Kemp Mill, MD
Hour by hour · 24h
24-Hour ForecastKemp Mill, MD: 24-hour forecast. Temperatures range from 76 to 95 degrees Fahrenheit with a 34% chance of precipitation at 8 PM.
L 76°H 95°
Kemp Mill, MD
7-day forecast
  1. Today
    Jul 4
    Overcast
    45%
    —
    100°78°—
  2. Sunday
    Jul 5
    Heavy Rain
    52%
    0.54″
    95°75°-5°
  3. Monday
    Jul 6
    Thunderstorm
    79%
    0.02″
    85°74°-10°
  4. Tuesday
    Jul 7
    Showers
    79%
    0.06″
    77°70°-8°
  5. Wednesday
    Jul 8
    Light Drizzle
    38%
    0.02″
    77°67°0°
  6. Thursday
    Jul 9
    Overcast
    12%
    —
    94°67°+17°
  7. Friday
    Jul 10
    Overcast
    43%
    —
    96°74°+2°
Kemp Mill, MD
Next 24 hours · Warm now
HOT 90°72°86°100°6p12a6a12pnow 87°high 95°low 76°PRECIP %
Kemp Mill, MD
Anemometer · 24h winds · from true
NESW
From · True
SW
227° · backing 55°
Direction
SW
227°
Sustained
12
mph
Gust
21
mph
Peak 24h
21
avg 4
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 4 · pk 21
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 218SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 55° from the sw.
Kemp Mill, MD
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1002.4
+2.6 mb in 3h · rising rapidly · 29.60 inHg
Now
1002.4
mb
3h
+2.6
mb
12h
-0.7
mb
24h
+0.5
mb
Regime · RAIN
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 999–1004
9909951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1003.5998.71002.4
−24h−18h−12h−6hnow
Pressure climbing out of the rain band — clearing edging in.
Kemp Mill, MD
Air quality
82
AQI
Moderate
↑+6 in 6h

AQI 82 (Moderate), driven by PM2.5. AQI up 6 over the last 6 hours (gradual rise). PM2.5 at 11.2 µg/m³, PM10 at 11.7 µg/m³ — typical background levels with no transport signature.

OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.

PM 2.5DRIVERGood
11.2μg/m³
PM 10Good
12μg/m³
NO₂Good
9μg/m³
OzoneUnhealthy SG
106μg/m³
UV IndexLow
0.1

What's driving it

Ozone × UV × Sky

Ozone at AQI 50. Overcast through the UV peak window (cloud cover ~67%) — afternoon ozone should stay flat.

Present
AQI 50
UV peak
0.1 at 1 PM
Sky at peak
overcast
Projected peak
AQI 6

PM × Wind × Precip

PM2.5 at 11.2 µg/m³, PM10 at 11.7 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.96
Wind
breezy
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/m³330
Kemp Mill, MD
Sky cover · visibility · 24h
Cloud cover
100%
OVERCAST
100%0%−24h−18h−12h−6hnow
Visibility
64.8mi
UNLIMITED
112 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
00:30 UTC · Kemp Mill, 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
00:30 UTC · Kemp Mill, MD · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Kemp Mill, MD
Satellite · infrared · animated
Kemp Mill, MD
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Kemp Mill, 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.
Kemp Mill, MD
The moon
Waning Gibbous
77% illuminated
Moonrise
11:24 PM
Moonset
11:18 AM
In sign
♓︎ Pisces
Kemp Mill, MD
Microseason
Jul 1–5

Cicadas claim the afternoon

fish
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Kemp Mill at a glance

  • Today vs. normal: 12°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 — Kemp Mill

  1. Sat100°78°45%
  2. Sun95°75°52%
  3. Mon85°74°79%
  4. Tue77°70°79%
  5. Wed77°67°38%
  6. Thu94°67°12%
  7. Fri96°74°43%
  8. Sat84°70°37%
  9. Sun80°68°22%
  10. Mon86°63°20%
  11. Tue91°66°17%
  12. Wed90°68°33%
  13. Thu89°67°37%
  14. Fri90°71°42%
  15. Sat91°71°44%
  16. Sun88°69°46%

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

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 — Kemp Mill

SPC has placed Kemp Mill 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 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

In Kemp Mill, July runs warmest near 78°F and January coldest around 32°F, while August is the wettest month (4.2 inches) and October the driest (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

Kemp Mill's climate, from NOAA NCEI 1991-2020 station normals, pairs 32°F Januarys with 78°F Julys — a 46°F swing. About 41.5 inches of precipitation falls over roughly 175 days a year.

Kemp Mill'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 Kemp Mill's rain calendar. It is a balanced pattern Kemp Mill shares with places like Burnt Mills, MD, Four Corners, MD and White Oak, MD.

Kemp Mill's growing window opens around mid-April, once Kemp Mill's overnight lows stop freezing — sow peas, lettuce, spinach, and radishes. Warm-soil crops in Kemp Mill wait about two weeks past Kemp Mill's last frost, once the soil warms. Around mid-November, freezing nights resume in Kemp Mill and tender crops must come in. Within Kemp Mill, cold-air pooling chills low spots by 5-10°F, shifting Kemp Mill's local frost dates.

Similar climates: Burnt Mills, MD, Four Corners, MD, White Oak, MD, Forest Glen, MD, Wheaton, MD.

Frequently asked

When does it freeze in Kemp Mill?
In Kemp Mill, expect the last spring frost near mid-April; Kemp Mill's first autumn frost comes around mid-November.
What is the rainy season in Kemp Mill?
August is the wettest month in Kemp Mill, about 4.2 inches on average; the year totals roughly 42 inches.
What is the warmest month in Kemp Mill?
July is Kemp Mill's warmest month, averaging about 78°F.
What is the coldest month in Kemp Mill?
Kemp Mill bottoms out in January, with a mean near 32°F.
When can I start a vegetable garden in Kemp Mill?
Frost-hardy sowings begin at mid-April in Kemp Mill; warm-season starts follow two weeks on.
How many rainy days does Kemp Mill get?
Kemp Mill records around 175 days of measurable precipitation annually.
What hardiness zone is Kemp Mill?
Kemp Mill sits in the USDA zone set by January lows near 32°F; the USDA ZIP tool gives the band.
What is the 10-day forecast for Kemp Mill?
Kemp Mill'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 Kemp Mill?
See this week's day-by-day rain chances for Kemp Mill in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Kemp Mill?
Current conditions for Kemp Mill and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Kemp Mill forecast updated?
The Kemp Mill forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Kemp Mill?
Today's sunrise and sunset times for Kemp Mill 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 Kemp Mill?
The next few days in Kemp Mill's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

Kemp Mill, Maryland occupies a warm-summer humid continental zone, with January means near 32°F and July around 78°F — a 46°F swing.

Rain and snow bring Kemp Mill roughly 42 inches a year across approximately 175 measurable-precipitation days.

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

All cities in Maryland →

Silver Spring, MD weather →

ZIP codes in Kemp Mill

  • 20902
  • 20901

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.