Johnston County, North Carolina, United States

Last updated: 6:36 PM CDT · Refresh

23°C

Feels like 26°

Mostly Cloudy

▲ 26° / ▼ 20°

Wind

5 mph E

Humidity

94%

Dew Point

22°

Pressure

29.82 inHg

Visibility

9 mi

UV Index

0.6

Cloud Cover

84%

Sunrise

6:37 AM

Sunset

7:55 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: Johnston County is currently mostly cloudy at 23°C. Precipitation is likely — peak probability 78% around 7 PM. Atmospheric instability is elevated (CAPE up to 1495 J/kg) — isolated convective development possible. Sunrise: 6:37AM · Sunset: 7:55PM.

42 AQI · Good Dominant: PM2.5 Air Quality

Hourly Forecast · Next 24 Hours

Now

23°

77%

8 PM

24°

70%

9 PM

23°

72%

10 PM

23°

61%

11 PM

22°

68%

12 AM

22°

74%

1 AM

22°

76%

2 AM

22°

71%

3 AM

22°

66%

4 AM

22°

66%

5 AM

20°

66%

6 AM

21°

66%

7 AM

21°

66%

8 AM

21°

66%

9 AM

22°

66%

10 AM

22°

62%

11 AM

23°

54%

12 PM

24°

53%

1 PM

26°

58%

2 PM

27°

64%

3 PM

27°

64%

4 PM

27°

59%

5 PM

27°

54%

6 PM

27°

50%

7-Day Forecast

Tonight

26° 20°

Mostly Cloudy with a 77% chance of rain.

Sat

29° 20°

Mostly Cloudy with a 76% chance of rain.

Sun

31° 21°

Mostly Clear with a 24% chance of rain.

Mon

31° 20°

Mostly Clear with a 53% chance of rain.

Tue

30° 18°

Partly Cloudy with a 45% chance of rain.

Wed

32° 21°

Heavy Rain, 80% chance.

Thu

30° 21°

Rain, 80% chance.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 23° Mostly Cloudy 77% 6 mph E 94%

8 PM 24° Rain 70% 4 mph E 95%

9 PM 23° Overcast 72% 3 mph E 96%

10 PM 23° Overcast 61% 4 mph SE 96%

11 PM 22° Rain 68% 4 mph SSE 97%

12 AM 22° Heavy Rain 74% 4 mph SSE 97%

1 AM 22° Rain 76% 3 mph SSE 96%

2 AM 22° Rain 71% 3 mph SE 96%

3 AM 22° Overcast 66% 2 mph ESE 96%

4 AM 22° Overcast 66% 2 mph E 96%

5 AM 20° Rain 66% 2 mph E 96%

6 AM 21° Rain 66% 2 mph ESE 95%

7 AM 21° Mostly Cloudy 66% 3 mph SE 94%

8 AM 21° Mostly Cloudy 66% 3 mph SE 94%

9 AM 22° Mostly Cloudy 66% 3 mph SE 92%

10 AM 22° Overcast 62% 3 mph SSE 89%

11 AM 23° Overcast 54% 3 mph S 85%

12 PM 24° Overcast 53% 4 mph SSW 80%

1 PM 26° Mostly Cloudy 58% 5 mph SSW 75%

2 PM 27° Mostly Cloudy 64% 5 mph SSW 72%

3 PM 27° Mostly Cloudy 64% 5 mph SSW 71%

4 PM 27° Mostly Cloudy 59% 5 mph SSW 71%

5 PM 27° Partly Cloudy 54% 5 mph SSW 72%

6 PM 27° Mostly Clear 50% 5 mph SSW 76%

15-Day Forecast

Today

8/21

Mostly Cloudy

77%

20°

26°

Sat

8/22

Mostly Cloudy

76%

20°

29°

Sun

8/23

Mostly Clear

24%

21°

31°

Mon

8/24

Mostly Clear

53%

20°

31°

Tue

8/25

Partly Cloudy

45%

18°

30°

Wed

8/26

Heavy Rain

80%

21°

32°

Thu

8/27

Rain

80%

21°

30°

Fri

8/28

Rain

83%

22°

32°

Sat

8/29

Rain

73%

21°

32°

Sun

8/30

Rain

72%

21°

32°

Mon

8/31

Drizzle

56%

21°

37°

Tue

9/1

Drizzle

60%

23°

36°

Wed

9/2

Drizzle

60%

22°

32°

Thu

9/3

Drizzle

60%

21°

31°

Fri

9/4

Drizzle

60%

21°

31°

Good

U.S. Air Quality Index · Dominant: PM2.5

50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today

PM_2.5

Fine particulate matter

Dominant

42 AQI 7.5 µg/m³

O₃

Ground-level ozone

39 AQI 43 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Sat 42 Good 39 42

Sun 36 Good 33 36

Mon 41 Good 33 41

About the Air Quality Index

0–50 Good

51–100 Moderate

101–150 Unhealthy for Sensitive Groups

151–200 Unhealthy

201–300 Very Unhealthy

301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM_2.5 (fine particles) is reported in µg/m³ and ozone (O₃) in ppb. Forecast source: NWS NAQFC.

Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio

RAP

Valid Fri Aug 21, 22:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE503 J/kg

MLCAPE498 J/kg

MUCAPE912 J/kg

SBCIN-38 J/kg

MLCIN-39 J/kg

Lifted Index-3.1

Kinematics

0–6 km Shear19 kt

0–1 km Shear16 kt

Eff. Shear17 kt

0–1 km SRH116

0–3 km SRH135

Eff. SRH135

Storm Motion274° @ 16 kt

0–1 km EHI0.4

Composite Parameters

Sig. Tornado0.0

STP (eff)0.0

Supercell0.0

K-Index40.2

Thermo & Levels

PWAT2.41 in

0–3 km LR4.7 °C/km

700–500 LR5.9 °C/km

Total Totals49.2

LCL996 hPa

LFC754 hPa

EL269 hPa

Freezing Lvl14,442 ft

Johnston County, North Carolina, United States

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