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

Weather in New Castle, Delaware

Roses open along the stoops. Day 59 of spring. Read this microseason across nine climate regions →

New Castle, DE
Sunday, May 17 at 2:36 AM
71
°
Clear
Feels like
67°
Humidity
48%
Wind
11 mph
Sunrise
5:46 AM
Sunset
8:10 PM
New Castle, DE
Hour by hour · 24h
54°
10p
53°
11p
53°
12a
52°
1a
51°
2a
50°
3a
50°
4a
50°
5a
50°
6a
51°
7a
52°
8a
55°
9a
59°
10a
63°
11a
65°
12p
67°
1p
67°
2p
67°
3p
66°
4p
67°
5p
69°
6p
68°
7p
65°
8p
60°
9p
L 50°H 69°
New Castle, DE
7-day forecast
  1. Today
    May 16
    Clear
    —
    82°50°
  2. Sunday
    May 17
    Overcast
    10%
    88°63°
  3. Monday
    May 18
    Overcast
    —
    96°64°
  4. Tuesday
    May 19
    Overcast
    —
    92°67°
  5. Wednesday
    May 20
    Showers
    62%
    92°65°
  6. Thursday
    May 21
    Overcast
    39%
    75°55°
  7. Friday
    May 22
    Drizzle
    38%
    61°50°
New Castle, DE
Next 24 hours · Cool now
46°59°72°12a6a12p6pnow 54°high 69°low 50°
New Castle, DE
Anemometer · 24h winds · from true
NESW
From · True
SSW
213° · veering 136°
Direction
SSW
213°
Sustained
11
mph
Gust
19
mph
Peak 24h
21
avg 8
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 8 · pk 21 @ 12:00p
−24h−18h−12h−6hnow
Light breeze veering 136° from the ssw.
New Castle, DE
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1014.4
-0.6 mb in 3h · steady · 29.96 inHg
Now
1014.4
mb
3h
-0.6
mb
12h
-2.7
mb
24h
-3.9
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 1014–1021
−24h−18h−12h−6hnow
Air sits at the threshold — small shifts decide the day.
New Castle, DE
Air quality
97
AQI
Moderate
PM 2.5
8.8 μg/m³
PM 10
9.1 μg/m³
NO₂
5.1 μg/m³
Ozone
117.0 μg/m³
UV Index
0.0 Low
New Castle, DE
Almanac · Sunday, May 17
When the dew is on the grass, rain will never come to pass.
Civil dawn
9:17 AM
Sunrise
5:46 AM
Daylight
14h 24m
Sunset
8:10 PM
Civil dusk
12:42 AM
Planting note
Direct sow okra, melons, and southern peas. Thin carrot rows.
New Castle, DE
The moon
New Moon
0% illuminated
Moonrise
9:51 AM
Moonset
12:37 AM
In sign
♊︎ Gemini
New Castle, DE
Microseason · 28 of 72
May 16–20

Roses open along the stoops

plant
Jan 137% of the yearDec 31

Read this microseason across nine climate regions →

New Castle at a glance

  • Today vs. normal: 71°F — typical for the season
  • Last frost: April 14 (climatological average for this latitude)
  • Microseason: 28 of 72, May 16–20
  • Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.

Right now in the garden

Warm-season window is open

As of May 17, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.

All cities in Delaware →

ZIP codes in New Castle

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.