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Port Penn, Delaware Weather

Fireflies rise from the lawn. Day 77 of spring. Read this microseason across nine climate regions →

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

Port Penn, DE
Thursday, June 4 at 3:37 AM
65
°
Clear
Feels like
59°
Humidity
48%
Wind
12 mph
Sunrise
5:36 AM
Sunset
8:24 PM
Port Penn, DE
Hour by hour · 24h
24-Hour ForecastPort Penn, DE: 24-hour forecast. Temperatures range from 58 to 88 degrees Fahrenheit.
L 58°H 88°
Port Penn, DE
7-day forecast
  1. Today
    Jun 3
    Partly Cloudy
    82°56°
  2. Thursday
    Jun 4
    Overcast
    88°58°+6°
  3. Friday
    Jun 5
    Overcast
    92°64°+4°
  4. Saturday
    Jun 6
    Overcast
    24%
    90°64°-2°
  5. Sunday
    Jun 7
    Light Showers
    30%
    84°64°-6°
  6. Monday
    Jun 8
    Overcast
    76°56°-8°
  7. Tuesday
    Jun 9
    Mostly Clear
    81°51°+5°
Port Penn, DE
Anemometer · 24h winds · from true
NESW
From · True
SSE
159° · backing 165°
Direction
SSE
159°
Sustained
12
mph
Gust
14
mph
Peak 24h
21
avg 7
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 7 · pk 21 @ 8:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 2010SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 165° from the sse.
Port Penn, DE
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1021.8
-0.9 mb in 3h · falling · 30.17 inHg
Now
1021.8
mb
3h
-0.9
mb
12h
-0.7
mb
24h
+0.2
mb
Regime · FAIR
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 10211024
10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1023.91020.71021.9
−24h−18h−12h−6hnow
Fair air starting to ease — a front may be approaching.
Port Penn, DE
Air quality
65
AQI
Good
+2 in 6h

Ozone at AQI 43 now. AQI flat over the last 6 hours (within ±3 points). With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 10 by mid-afternoon.

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

PM 2.5Good
3.8μg/m³
PM 10Good
4μg/m³
NO₂Good
10μg/m³
OzoneDRIVERModerate
92μg/m³
UV IndexLow
0.0

What's driving it

Ozone × UV × Sky

Ozone at AQI 43 now. With UV 0.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 10 by mid-afternoon.

Present
AQI 43
UV peak
0.0 at 1 PM
Sky at peak
clear
Projected peak
AQI 10
Port Penn, DE
Sky cover · visibility · 24h
Cloud cover
0%
CLEAR
100%0%−24h−18h−12h−6hnow

Visibility
74.8mi
UNLIMITED
138 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
03:37 UTC ·Port Penn, DE · NOAA NESDIS / STAR · 21696x21696 px
Continental US · GOES-19 ABI
CONUS Sector · Visible · GeoColor
GOES-19 CONUS Visible · GeoColor
Daytime true-color, blue-light/IR sandwich at night
03:37 UTC ·Port Penn, DE · NOAA NESDIS / STAR · 5-min cadence · 10000x6000 px
Port Penn, DE
Satellite · infrared · animated
Port Penn, DE
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Port Penn, DE
Almanac · Thursday, June 4
A summer fog for fair, a winter fog for rain.
Civil dawn
9:05 AM
Sunrise
5:36 AM
Daylight
14h 48m
Sunset
8:24 PM
Civil dusk
12:58 AM
Planting note
Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Port Penn, DE
The moon
Waning Gibbous
87% illuminated
Moonrise
3:28 AM
Moonset
1:03 PM
In sign
♑︎ Capricorn
Port Penn, DE
Microseason
Jun 1–5

Fireflies rise from the lawn

bird
Jan 142% of the yearDec 31

Read this microseason across nine climate regions →

Port Penn at a glance

  • Today vs. normal: 10°F below the seasonal normal for this latitude
  • Last frost: April 13 (climatological average for this latitude)
  • Microseason: Jun 1–5
  • Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.

Right now in the garden

Peak growing season

As of June 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.

ZIP codes in Port Penn

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.