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St. Helena, North Carolina Weather

Cicadas claim the scorching afternoon. Day 15 of summer. Read this microseason across nine climate regions →

St. Helena weather forecast — hour by hour, 7-day outlook, NOAA radar

St. Helena, NC
Sunday, July 5 at 3:36 AM
75
°
Clear
Feels like
83°
Humidity
92%
Wind
4 mph
Sunrise
2:04 AM
Sunset
4:27 PM
St. Helena, NC
Hour by hour · 24h
24-Hour ForecastSt. Helena, NC: 24-hour forecast. Temperatures range from 74 to 96 degrees Fahrenheit.
L 74°H 96°
St. Helena, NC
7-day forecast
  1. Today
    Jul 5
    Heavy Showers
    1.1″
    96°74°
  2. Monday
    Jul 6
    Light Drizzle
    65%
    0.20″
    97°76°+1°
  3. Tuesday
    Jul 7
    Drizzle
    50%
    98°75°+1°
  4. Wednesday
    Jul 8
    Drizzle
    50%
    0.03″
    99°78°+1°
  5. Thursday
    Jul 9
    Showers
    20%
    99°75°
  6. Friday
    Jul 10
    Overcast
    21%
    103°78°+4°
  7. Saturday
    Jul 11
    Heavy Drizzle
    46%
    0.17″
    102°73°-1°
St. Helena, NC
Anemometer · 24h winds · from true
NESW
From · True
S
180° · backing 53°
Direction
S
180°
Sustained
4
mph
Gust
10
mph
Peak 24h
21
avg 5
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 5 · pk 21 @ 11:00p
01020MPHB1B2B3B4B5-21h-18h-15h-12h-9h-6h-3h-24hNOWpk 207SUSTGUST
−24h−18h−12h−6hnow
Light breeze backing 53° from the s.
St. Helena, NC
Barometer · 24h pressure · mb
STORMRAINCHANGEFAIRDRY9901000101010201030
Pressure · mb
1012.0
-1.9 mb in 3h · falling · 29.88 inHg
Now
1012.0
mb
3h
-1.9
mb
12h
-1.7
mb
24h
-2.9
mb
Regime · CHANGE
STORM
RAIN
CHANGE
FAIR
DRY
24h · Pressure · mb
range 10121016
9951000STORM|RAIN10051010RAIN|CHG1015CHG|FAIR10201025FAIR|DRY1030-21h-18h-15h-12h-9h-6h-3h-24hNOW1015.91011.91011.9
−24h−18h−12h−6hnow
Pressure slipping through the change line — wetter air on the way.
St. Helena, NC
Air quality
33
AQI
Good
-2 in 6h

AQI 33 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 4.5 µg/m³ (AQI 25) with a 0.78 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.

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

PM 2.5DRIVERGood
4.5μg/m³
PM 10Good
6μg/m³
NO₂Good
4μg/m³
OzoneGood
38μg/m³
UV IndexLow
0.0

What's driving it

PM × Wind × Precip

PM2.5 at 4.5 µg/m³ (AQI 25) with a 0.78 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.

PM2.5/PM10
0.78
Wind
calm
Recent rain
0h in last 6h
Pattern
stagnant smoke
St. Helena, NC
Sky cover · visibility · 24h
Cloud cover
2%
CLEAR
100%0%−24h−18h−12h−6hnow

Visibility
25.7mi
UNLIMITED
84 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
07:36 UTC · St. Helena, NC · 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
07:36 UTC · St. Helena, NC · NOAA NESDIS / STAR · 5-min cadence · up to 10000 px
St. Helena, NC
Satellite · infrared · animated
St. Helena, NC
Loading IR frames…
IR · cloud-top temp© RainViewer · Carto
St. Helena, NC
Almanac · Sunday, July 5
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
Civil dawn
5:36 AM
Sunrise
2:04 AM
Daylight
14h 23m
Sunset
4:27 PM
Civil dusk
8:58 PM
Planting note
Harvest early potatoes. Begin drying onions on the surface.
St. Helena, NC
The moon
Waning Gibbous
75% illuminated
Moonrise
11:25 PM
Moonset
11:23 AM
In sign
♓︎ Pisces
St. Helena, NC
Microseason
Jul 1–5

Cicadas claim the scorching afternoon

plant
Jan 151% of the yearDec 31

Read this microseason across nine climate regions →

St. Helena at a glance

  • Today vs. normal: 75°F — typical for the season
  • Last frost: March 14 (climatological average for this latitude)
  • Microseason: Jul 1–5
  • Planting window: Harvest early potatoes. Begin drying onions on the surface.

15-Day Forecast — St. Helena

  1. Sun96°74°4%
  2. Mon97°76°65%
  3. Tue98°75°50%
  4. Wed99°78°50%
  5. Thu99°75°20%
  6. Fri103°78°21%
  7. Sat102°73°46%
  8. Sun100°73°52%
  9. Mon88°71°36%
  10. Tue87°67°17%
  11. Wed94°67°15%
  12. Thu92°71°47%
  13. Fri94°71°36%
  14. Sat84°72°42%
  15. Sun93°70°34%

Forecast data from Open-Meteo (CC BY 4.0).

Right now in the garden

Peak growing season

As of July 5, 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 — St. Helena

SPC includes St. Helena in the general thunderstorm area today — no severe risk, but storms are possible.

  • TODAYTSTMGeneral Thunderstorms
  • TOMORROWTSTMGeneral Thunderstorms
  • DAY 3TSTMGeneral Thunderstorms

Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.

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.

ZIP codes in St. Helena

  • 28425

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.