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Hartly, Delaware Weather

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

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

Hartly, DE
Saturday, July 4 at 1:57 AM
87
°
Clear
Feels like
94°
Humidity
61%
Wind
7 mph
Sunrise
1:41 AM
Sunset
4:32 PM
Hartly, DE
Hour by hour · 24h
24-Hour ForecastHartly, DE: 24-hour forecast. Temperatures range from 77 to 104 degrees Fahrenheit with a 21% chance of precipitation at 9 PM.
L 77°H 104°
Hartly, DE
7-day forecast
  1. Today
    Jul 4
    Heavy Rain
    21%
    1.7″
    104°77°—
  2. Sunday
    Jul 5
    Heavy Showers
    74%
    0.62″
    94°70°-10°
  3. Monday
    Jul 6
    T-storm w/ Hail
    74%
    0.26″
    88°70°-6°
  4. Tuesday
    Jul 7
    Thunderstorm
    60%
    0.10″
    86°70°-2°
  5. Wednesday
    Jul 8
    Light Drizzle
    34%
    —
    83°67°-3°
  6. Thursday
    Jul 9
    Light Showers
    27%
    0.27″
    95°67°+12°
  7. Friday
    Jul 10
    Light Drizzle
    28%
    0.02″
    88°70°-7°
Hartly, DE
Next 24 hours · Warm now
HOT 90°70°90°110°12a6a12p6pnow 88°high 104°low 77°PRECIP %
Hartly, DE
Anemometer · 24h winds · from true
NESW
From · True
W
272° · veering 36°
Direction
W
272°
Sustained
7
mph
Gust
15
mph
Peak 24h
15
avg 6
Beaufort · 2 · LIGHT 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 6 · pk 15 @ 11:00p
01020304050MPHB1B2B3B4B5B6B7B8B9-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 483SUSTGUST
−24h−18h−12h−6hnow
Light breeze veering 36° from the w.
Hartly, DE
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1011.2
-0.7 mb in 3h · falling · 29.86 inHg
Now
1011.2
mb
3h
-0.7
mb
12h
-2.9
mb
24h
-2.4
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1011–1015
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1014.71010.91011.3
−24h−18h−12h−6hnow
Air sits at the threshold — small shifts decide the day.
Hartly, DE
Air quality
69
AQI
Moderate
↓-44 in 6h

AQI 69 (Moderate), driven by PM2.5. AQI down 44 over the last 6 hours — air quality is improving sharply. PM2.5 at 9.3 µg/m³, PM10 at 10.2 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
9.3μg/m³
PM 10Good
10μg/m³
NO₂Good
12μg/m³
OzoneModerate
82μg/m³
UV IndexLow
0.0

What's driving it

Ozone × UV × Sky

Ozone at AQI 39 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 17 around 1 PM.

Present
AQI 39
UV peak
3.3 at 1 PM
Sky at peak
clear
Projected peak
AQI 17

PM × Wind × Precip

PM2.5 at 9.3 µg/m³, PM10 at 10.2 µg/m³ — typical background levels with no transport signature.

PM2.5/PM10
0.91
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 TREND50100SATSUNMONTUEWEDTHUFRISAT7-DAY PM2.5 TREND · μg/m³300
Hartly, DE
Sky cover · visibility · 24h
Cloud cover
0%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
56.1mi
UNLIMITED
101 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
05:57 UTC · Hartly, DE · 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
05:57 UTC · Hartly, DE · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
Hartly, DE
Satellite · infrared · animated
Hartly, DE
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
Hartly, DE
Almanac · Saturday, July 4
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:11 AM
Sunrise
1:41 AM
Daylight
14h 51m
Sunset
4:32 PM
Civil dusk
9:05 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
Hartly, DE
The moon
Waning Gibbous
84% illuminated
Moonrise
10:55 PM
Moonset
10:07 AM
In sign
♒︎ Aquarius
Hartly, DE
Microseason
Jul 1–5

Cicadas claim the afternoon

plant
Jan 150% of the yearDec 31

Read this microseason across nine climate regions →

Hartly 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: 19953

15-Day Forecast — Hartly

  1. Sat104°77°21%
  2. Sun94°70°74%
  3. Mon88°70°74%
  4. Tue86°70°60%
  5. Wed83°67°34%
  6. Thu95°67°27%
  7. Fri88°70°28%
  8. Sat87°69°23%
  9. Sun88°71°25%
  10. Mon87°67°13%
  11. Tue97°73°16%
  12. Wed83°67°30%
  13. Thu87°62°32%
  14. Fri91°64°35%
  15. Sat84°71°31%

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 — Hartly

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

  • TODAYSLGTSlight Risk
  • TOMORROWSLGTSlight Risk
  • DAY 3SLGTSlight Risk

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.

All cities in Delaware →

Dover, DE weather →

ZIP codes in Hartly

  • 19953

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.