Mercer County, New Jersey, United States

Last updated: 4:24 PM CDT · Refresh

27°C

Feels like 30°

Overcast

▲ 30° / ▼ 21°

Wind

9 mph SSW

Humidity

87%

Dew Point

24°

Pressure

29.61 inHg

Visibility

10 mi

UV Index

2.8

Cloud Cover

90%

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 27°C. Precipitation is likely — peak probability 90% around 6 PM. Atmospheric instability is elevated (CAPE up to 1728 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

27°

70%

6 PM

26°

90%

7 PM

25°

63%

8 PM

24°

57%

9 PM

23°

59%

10 PM

23°

56%

11 PM

23°

53%

12 AM

23°

53%

1 AM

23°

49%

2 AM

23°

49%

3 AM

22°

49%

4 AM

22°

64%

5 AM

21°

50%

6 AM

21°

51%

7 AM

22°

46%

8 AM

22°

46%

9 AM

24°

47%

10 AM

25°

43%

11 AM

26°

33%

12 PM

27°

33%

1 PM

27°

31%

2 PM

27°

31%

3 PM

27°

31%

4 PM

27°

31%

7-Day Forecast

Today

30° 21°

Overcast with a 70% chance of rain.

Wed

29° 19°

Partly Cloudy with a 50% chance of rain.

Thu

28° 17°

Mostly Clear.

Fri

27° 16°

Mostly Cloudy.

Sat

28° 17°

Clear.

Sun

29° 18°

Rain, 81% chance.

Mon

29° 20°

Drizzle, 60% chance.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 27° Overcast 70% 9 mph SSW 87%

6 PM 26° Overcast 90% 9 mph SSW 89%

7 PM 25° Overcast 63% 10 mph S 91%

8 PM 24° Overcast 57% 9 mph S 92%

9 PM 23° Overcast 59% 7 mph SSW 94%

10 PM 23° Mostly Cloudy 56% 7 mph SSW 94%

11 PM 23° Mostly Cloudy 53% 6 mph SSW 94%

12 AM 23° Overcast 53% 7 mph SSW 94%

1 AM 23° Overcast 49% 8 mph SSW 94%

2 AM 23° Overcast 49% 9 mph SSW 93%

3 AM 22° Mostly Cloudy 49% 10 mph SSW 93%

4 AM 22° Mostly Cloudy 64% 10 mph SSW 92%

5 AM 21° Mostly Cloudy 50% 10 mph SSW 91%

6 AM 21° Mostly Cloudy 51% 10 mph SSW 90%

7 AM 22° Partly Cloudy 46% 10 mph SW 89%

8 AM 22° Partly Cloudy 46% 9 mph SW 87%

9 AM 24° Partly Cloudy 47% 9 mph WSW 82%

10 AM 25° Partly Cloudy 43% 9 mph WSW 77%

11 AM 26° Partly Cloudy 33% 10 mph WSW 72%

12 PM 27° Partly Cloudy 33% 10 mph WSW 68%

1 PM 27° Partly Cloudy 31% 10 mph WSW 65%

2 PM 27° Partly Cloudy 31% 9 mph W 63%

3 PM 27° Mostly Clear 31% 10 mph W 63%

4 PM 27° Mostly Clear 31% 10 mph W 62%

15-Day Forecast

Today

7/21

Overcast

70%

21°

30°

Wed

7/22

Partly Cloudy

50%

19°

29°

Thu

7/23

Mostly Clear

13%

17°

28°

Fri

7/24

Mostly Cloudy

16°

27°

Sat

7/25

Clear

19%

17°

28°

Sun

7/26

Rain

81%

18°

29°

Mon

7/27

Drizzle

60%

20°

29°

Tue

7/28

Drizzle

60%

19°

28°

Wed

7/29

Drizzle

60%

18°

28°

Thu

7/30

Drizzle

60%

19°

31°

Fri

7/31

Drizzle

60%

21°

29°

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, 20:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE2218 J/kg

MLCAPE2028 J/kg

MUCAPE2332 J/kg

SBCIN0 J/kg

MLCIN0 J/kg

Lifted Index-6.1

Kinematics

0–6 km Shear39 kt

0–1 km Shear15 kt

Eff. Shear37 kt

0–1 km SRH-34

0–3 km SRH-77

Eff. SRH-77

Storm Motion209° @ 36 kt

0–1 km EHI-0.5

Composite Parameters

Sig. Tornado0.0

STP (eff)0.0

Supercell0.0

K-Index30.9

Thermo & Levels

PWAT2.10 in

0–3 km LR6.0 °C/km

700–500 LR5.8 °C/km

Total Totals46.1

LCL954 hPa

LFC1003 hPa

EL171 hPa

Freezing Lvl14,140 ft

Mercer County, New Jersey, United States

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