Weather StoryAlmanac, microseasons, and the day's weather story.

Pasadena, Maryland Weather

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

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

Pasadena, MD
Saturday, July 4 at 7:19 PM
87
°
Heavy Showers
Feels like
84°
Humidity
50%
Wind
22 mph
Sunrise
1:45 AM
Sunset
4:35 PM
Pasadena, MD
Hour by hour · 24h
24-Hour ForecastPasadena, MD: 24-hour forecast. Temperatures range from 75 to 95 degrees Fahrenheit with a 36% chance of precipitation at 8 PM.
L 75°H 95°
Pasadena, MD
7-day forecast
  1. Today
    Jul 4
    Showers
    36%
    0.27″
    101°78°—
  2. Sunday
    Jul 5
    Heavy Drizzle
    53%
    0.07″
    95°75°-6°
  3. Monday
    Jul 6
    Thunderstorm
    73%
    —
    82°74°-13°
  4. Tuesday
    Jul 7
    Thunderstorm
    73%
    0.02″
    84°73°+2°
  5. Wednesday
    Jul 8
    Heavy Showers
    35%
    0.45″
    78°70°-6°
  6. Thursday
    Jul 9
    Partly Cloudy
    12%
    —
    92°72°+14°
  7. Friday
    Jul 10
    Light Drizzle
    40%
    0.01″
    93°76°+1°
Pasadena, MD
Next 24 hours · Hot now
HOT 90°70°85°100°6p12a6a12pnow 93°high 95°low 75°PRECIP %
Pasadena, MD
Anemometer · 24h winds · from true
NESW
From · True
SW
231° · backing 30°
Direction
SW
231°
Sustained
22
mph
Gust
48
mph
Peak 24h
48
avg 4
Beaufort · 5 · FRESH 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 48
0102030MPHB1B2B3B4B5B6-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 238SUSTGUST
−24h−18h−12h−6hnow
Sustained 22 mph with gusts pulsing to 48 — flags snap, branches bend.
Pasadena, MD
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1008.9
-0.6 mb in 3h · falling · 29.79 inHg
Now
1008.9
mb
3h
-0.6
mb
12h
-3.0
mb
24h
-1.9
mb
Regime · RAIN
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1007–1012
1000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1012.01007.41008.5
−24h−18h−12h−6hnow
Damp, unsettled regime — wet weather lingers nearby.
Pasadena, MD
Air quality
182
AQI
Unhealthy
↑+117 in 6h

AQI 182 (Unhealthy), driven by Ozone. AQI up 117 in the last 6 hours — air quality is degrading. Ozone at AQI 117. Overcast through the UV peak window (cloud cover ~87%) — afternoon ozone should stay flat.

LIMIT OUTDOORS Limit prolonged outdoor exertion. Sensitive groups should avoid outdoor exertion. Consider rescheduling outdoor activities until AQI improves.

PM 2.5Good
9.1μg/m³
PM 10Good
10μg/m³
NO₂Good
7μg/m³
OzoneDRIVERUnhealthy
148μg/m³
UV IndexLow
0.3

What's driving it

Ozone × UV × Sky

Ozone at AQI 117. Overcast through the UV peak window (cloud cover ~87%) — afternoon ozone should stay flat.

Present
AQI 117
UV peak
0.2 at 1 PM
Sky at peak
overcast
Projected peak
AQI 14

PM × Wind × Precip

PM scrubbed by 2 hours of recent rain — PM2.5 down to 9.1 µg/m³, PM10 to 9.5 µg/m³.

PM2.5/PM10
0.96
Wind
windy
Recent rain
2h in last 6h
Pattern
washed out

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
Pasadena, MD
Sky cover · visibility · 24h
Cloud cover
35%
MOSTLY CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
3.1mi
MODERATE
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
23:19 UTC · Pasadena, 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
23:19 UTC · Pasadena, MD · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Pasadena, MD
Satellite · infrared · animated
Pasadena, MD
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Pasadena, MD
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:14 AM
Sunrise
1:45 AM
Daylight
14h 50m
Sunset
4:35 PM
Civil dusk
9:09 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Pasadena, MD
The moon
Waning Gibbous
78% illuminated
Moonrise
10:58 PM
Moonset
10:10 AM
In sign
♓︎ Pisces
Pasadena, MD
Microseason
Jul 1–5

Cicadas claim the afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Pasadena at a glance

  • Today vs. normal: 15°F above the seasonal normal for this latitude
  • Last frost: April 11 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

ZIP code: 21122

16-Day Forecast — Pasadena

  1. Sat101°78°36%
  2. Sun95°75°53%
  3. Mon82°74°73%
  4. Tue84°73°73%
  5. Wed78°70°35%
  6. Thu92°72°12%
  7. Fri93°76°40%
  8. Sat91°73°34%
  9. Sun83°74°22%
  10. Mon79°73°19%
  11. Tue88°71°19%
  12. Wed89°74°40%
  13. Thu93°75°42%
  14. Fri92°76°35%
  15. Sat91°74°35%
  16. Sun92°76°39%

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 — Pasadena

SPC has placed Pasadena 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

July is Pasadena's warmest stretch (~78°F) and January its coldest (~32°F); precipitation crests in December at 4.5 inches and ebbs in October to 3.1 inches.

MonthMean tempPrecipRainy days
January32°3.8″14
February35°3.2″14
March43°3.8″16
April54°4.0″17
May62°3.8″17
June72°4.0″17
July78°3.2″16
August76°4.4″17
September70°3.9″14
October59°3.1″12
November46°4.0″14
December37°4.5″15

Regional context

Pasadena's climate, from NOAA NCEI 1991-2020 station normals, pairs 32°F Januarys with 78°F Julys — a 46°F swing. About 45.6 inches of precipitation falls over roughly 184 days a year.

No season owns Pasadena's rain: December reaches 4.5 inches across 14.9 days and October keeps 3.1 inches on 11.9, an even spread through Pasadena's year. That lines Pasadena up with places like Riviera Beach, MD, Glen Burnie, MD and Severna Park, MD, fed by overlapping storm tracks.

Pasadena's growing window opens around mid-April, once Pasadena's overnight lows stop freezing — sow peas, lettuce, spinach, and radishes. In Pasadena, warm-season transplants — tomatoes, peppers, basil — wait two weeks past Pasadena's frost date. Pasadena's window closes around mid-November as overnight lows return below freezing. In Pasadena, low spots run 4-7°F colder than nearby slopes, nudging Pasadena's frost dates a week.

Similar climates: Riviera Beach, MD, Glen Burnie, MD, Severna Park, MD, Ferndale, MD, Lake Shore, MD.

Frequently asked

When does it freeze in Pasadena?
Frost typically leaves Pasadena by mid-April and returns to Pasadena near mid-November.
What is the rainy season in Pasadena?
Pasadena sees its heaviest rain in December (around 4.5 inches), part of roughly 46 inches a year.
What is the warmest month in Pasadena?
The warmest stretch in Pasadena comes in July, around 78°F on average.
What is the coldest month in Pasadena?
On average January is the chilliest month in Pasadena, about 32°F.
When can I start a vegetable garden in Pasadena?
Frost-hardy sowings begin at mid-April in Pasadena; warm-season starts follow two weeks on.
How many rainy days does Pasadena get?
Expect roughly 184 wet days a year in Pasadena.
What hardiness zone is Pasadena?
Pasadena's hardiness zone tracks its winter low; with January near 32°F, check the USDA ZIP map for the exact zone.
What is the 10-day forecast for Pasadena?
Pasadena'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 Pasadena?
See this week's day-by-day rain chances for Pasadena in the daily forecast above, and the next 24 hours in the hourly chart.
What is the weather like right now in Pasadena?
Current conditions for Pasadena and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
How often is the Pasadena forecast updated?
The Pasadena forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
When are sunrise and sunset in Pasadena?
Today's sunrise and sunset times for Pasadena 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 Pasadena?
The next few days in Pasadena's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.

Climate

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

In a typical year Pasadena records about 46 inches of precipitation on around 184 days.

The 46°F gap between Pasadena's summer and winter, at 39.2°N, shapes Pasadena's frost calendar.

All cities in Maryland →

Baltimore, MD weather →

ZIP codes in Pasadena

  • 21122
  • 21060
  • 21226
  • 21412

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.