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

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 7:19 PM
99
°
Clear
Feels like
102°
Humidity
32%
Wind
6 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 100 degrees Fahrenheit with a 22% chance of precipitation at 12 AM.
L 77°H 100°
Hartly, DE
7-day forecast
  1. Today
    Jul 4
    Drizzle
    15%
    0.04″
    104°81°—
  2. Sunday
    Jul 5
    Light Drizzle
    32%
    0.02″
    97°77°-7°
  3. Monday
    Jul 6
    Thunderstorm
    74%
    —
    87°73°-10°
  4. Tuesday
    Jul 7
    Thunderstorm
    74%
    —
    87°70°0°
  5. Wednesday
    Jul 8
    Heavy Drizzle
    31%
    0.02″
    79°68°-8°
  6. Thursday
    Jul 9
    Partly Cloudy
    12%
    —
    90°68°+11°
  7. Friday
    Jul 10
    Overcast
    35%
    —
    94°72°+4°
Hartly, DE
Next 24 hours · Hot now
HOT 90°70°90°110°6p12a6a12pnow 100°high 100°low 77°PRECIP %
Hartly, DE
Anemometer · 24h winds · from true
NESW
From · True
S
178° · backing 71°
Direction
S
178°
Sustained
6
mph
Gust
8
mph
Peak 24h
18
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 18 @ 1:00a
01020304050MPHB1B2B3B4B5B6B7B8B9-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 4314SUSTGUST
−24h−18h−12h−6hnow
A whisper of wind — leaves barely shift on the trees.
Hartly, DE
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1008.9
-0.9 mb in 3h · falling · 29.79 inHg
Now
1008.9
mb
3h
-0.9
mb
12h
-2.9
mb
24h
-1.9
mb
Regime · RAIN
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1009–1013
1000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1012.51008.51009.0
−24h−18h−12h−6hnow
Pressure giving way — clouds thicken and rain edges closer.
Hartly, DE
Air quality
107
AQI
Unhealthy for Sensitive Groups
↑+57 in 6h

AQI 107 (Unhealthy for Sensitive Groups), driven by Ozone. AQI up 57 in the last 6 hours — air quality is degrading. Ozone at AQI 85. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.

CAUTION Sensitive groups (children, elderly, respiratory conditions) should limit prolonged outdoor exertion.

PM 2.5Good
6.8μg/m³
PM 10Good
7μg/m³
NO₂Good
3μg/m³
OzoneDRIVERUnhealthy SG
128μg/m³
UV IndexLow
0.3

What's driving it

Ozone × UV × Sky

Ozone at AQI 85. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.

Present
AQI 85
UV peak
0.2 at 1 PM
Sky at peak
overcast
Projected peak
AQI 10

PM × Wind × Precip

PM scrubbed by 2 hours of recent rain — PM2.5 down to 6.8 µg/m³, PM10 to 7.2 µg/m³.

PM2.5/PM10
0.94
Wind
light
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/m³300
Hartly, DE
Sky cover · visibility · 24h
Cloud cover
0%
CLEAR
100%0%−24h−18h−12h−6hnow
Visibility
117.2mi
UNLIMITED
135 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 · 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
23:19 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
78% illuminated
Moonrise
10:55 PM
Moonset
10:07 AM
In sign
♓︎ Pisces
Hartly, DE
Microseason
Jul 1–5

Cicadas claim the afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

Hartly at a glance

  • Today vs. normal: 27°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

16-Day Forecast — Hartly

  1. Sat104°81°15%
  2. Sun97°77°32%
  3. Mon87°73°74%
  4. Tue87°70°74%
  5. Wed79°68°31%
  6. Thu90°68°12%
  7. Fri94°72°35%
  8. Sat93°73°35%
  9. Sun84°69°25%
  10. Mon78°70°18%
  11. Tue88°66°17%
  12. Wed93°68°42%
  13. Thu93°70°39%
  14. Fri94°73°35%
  15. Sat91°71°33%
  16. Sun93°73°43%

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 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.

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.