Mercer County, New Jersey, United States

Last updated: 5:53 PM CDT · Refresh

25°C

Feels like 28°

Overcast

▲ 30° / ▼ 21°

Wind

7 mph S

Humidity

90%

Dew Point

23°

Pressure

29.59 inHg

Visibility

10 mi

UV Index

1.7

Cloud Cover

89%

Sunrise

5:46 AM

Sunset

8:23 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: Mercer County is currently overcast at 25°C. Precipitation is likely — peak probability 64% around 7 PM. Atmospheric instability is elevated (CAPE up to 1485 J/kg) — isolated convective development possible. Sunrise: 5:46AM · Sunset: 8:23PM.

72 AQI · Moderate Dominant: PM2.5 Air Quality

Hourly Forecast · Next 24 Hours

Now

25°

61%

7 PM

24°

64%

8 PM

24°

58%

9 PM

23°

60%

10 PM

23°

54%

11 PM

23°

55%

12 AM

23°

51%

1 AM

23°

51%

2 AM

22°

52%

3 AM

22°

52%

4 AM

22°

53%

5 AM

21°

53%

6 AM

22°

46%

7 AM

22°

47%

8 AM

23°

47%

9 AM

25°

37%

10 AM

26°

28%

11 AM

27°

26%

12 PM

27°

26%

1 PM

28°

24%

2 PM

28°

24%

3 PM

28°

25%

4 PM

28°

25%

5 PM

28°

25%

7-Day Forecast

Tonight

30° 21°

Overcast with a 61% chance of rain.

Wed

29° 19°

Partly Cloudy with a 52% chance of rain.

Thu

29° 17°

Mostly Clear.

Fri

27° 17°

Fog.

Sat

28° 16°

Partly Cloudy.

Sun

29° 18°

Rain, 71% chance.

Mon

29° 20°

Drizzle, 60% chance.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 25° Overcast 61% 7 mph S 90%

7 PM 24° Overcast 64% 9 mph S 90%

8 PM 24° Overcast 58% 8 mph SSW 94%

9 PM 23° Overcast 60% 8 mph SSW 94%

10 PM 23° Mostly Cloudy 54% 6 mph SSW 94%

11 PM 23° Mostly Cloudy 55% 7 mph SSW 94%

12 AM 23° Overcast 51% 9 mph SSW 94%

1 AM 23° Overcast 51% 10 mph SSW 93%

2 AM 22° Overcast 52% 9 mph SSW 92%

3 AM 22° Mostly Cloudy 52% 9 mph SSW 91%

4 AM 22° Mostly Cloudy 53% 10 mph SSW 92%

5 AM 21° Partly Cloudy 53% 9 mph SSW 90%

6 AM 22° Partly Cloudy 46% 9 mph SW 89%

7 AM 22° Mostly Clear 47% 10 mph SW 88%

8 AM 23° Partly Cloudy 47% 9 mph SW 84%

9 AM 25° Partly Cloudy 37% 9 mph WSW 79%

10 AM 26° Partly Cloudy 28% 9 mph WSW 73%

11 AM 27° Partly Cloudy 26% 10 mph W 69%

12 PM 27° Partly Cloudy 26% 10 mph W 65%

1 PM 28° Partly Cloudy 24% 10 mph W 62%

2 PM 28° Partly Cloudy 24% 10 mph W 61%

3 PM 28° Mostly Clear 25% 10 mph W 60%

4 PM 28° Mostly Clear 25% 10 mph W 59%

5 PM 28° Mostly Clear 25% 9 mph W 61%

15-Day Forecast

Today

7/21

Overcast

61%

21°

30°

Wed

7/22

Partly Cloudy

52%

19°

29°

Thu

7/23

Mostly Clear

12%

17°

29°

Fri

7/24

Fog

15%

17°

27°

Sat

7/25

Partly Cloudy

16°

28°

Sun

7/26

Rain

71%

18°

29°

Mon

7/27

Drizzle

60%

20°

29°

Tue

7/28

Drizzle

63%

19°

28°

Wed

7/29

Drizzle

68%

18°

27°

Thu

7/30

Drizzle

68%

18°

28°

Fri

7/31

Drizzle

46%

20°

28°

Sat

8/1

Drizzle

60%

20°

28°

Sun

8/2

Drizzle

60%

20°

29°

Mon

8/3

Drizzle

60%

21°

29°

Tue

8/4

Drizzle

60%

21°

30°

Moderate

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

50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today

PM_2.5

Fine particulate matter

Dominant

72 AQI 20.4 µg/m³

O₃

Ground-level ozone

36 AQI 39 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Wed 72 Moderate 36 72

Thu 38 Good 38 34

Fri 47 Good 44 47

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 Tue Jul 21, 21:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE1297 J/kg

MLCAPE1450 J/kg

MUCAPE1714 J/kg

SBCIN-82 J/kg

MLCIN0 J/kg

Lifted Index-4.8

Kinematics

0–6 km Shear36 kt

0–1 km Shear17 kt

Eff. Shear36 kt

0–1 km SRH-83

0–3 km SRH-136

Eff. SRH-136

Storm Motion216° @ 35 kt

0–1 km EHI-0.7

Composite Parameters

Sig. Tornado0.0

STP (eff)0.0

Supercell0.0

K-Index33.2

Thermo & Levels

PWAT2.06 in

0–3 km LR5.5 °C/km

700–500 LR5.8 °C/km

Total Totals45.8

LCL971 hPa

LFC767 hPa

EL192 hPa

Freezing Lvl13,862 ft

Mercer County, New Jersey, United States

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