Frederick County, Maryland, United States

Last updated: 6:14 PM CDT · Refresh

31°C

Feels like 38°

Partly Cloudy

▲ 37° / ▼ 21°

Wind

8 mph SW

Humidity

70%

Dew Point

21°

Pressure

29.46 inHg

Visibility

10 mi

UV Index

3.3

Cloud Cover

48%

Sunrise

5:47 AM

Sunset

8:40 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: Frederick County is currently partly cloudy at 31°C. Precipitation is likely — peak probability 82% around 7 PM. Atmospheric instability is elevated (CAPE up to 1643 J/kg) — isolated convective development possible. Sunrise: 5:47AM · Sunset: 8:40PM.

61 AQI · Moderate Dominant: PM2.5 Air Quality

Hourly Forecast · Next 24 Hours

Now

31°

43%

8 PM

29°

58%

9 PM

28°

54%

10 PM

26°

69%

11 PM

26°

44%

12 AM

25°

60%

1 AM

24°

44%

2 AM

24°

26%

3 AM

23°

11%

4 AM

23°

5 AM

21°

6 AM

21°

7 AM

22°

8 AM

23°

22%

9 AM

26°

37%

10 AM

27°

40%

11 AM

28°

44%

12 PM

29°

45%

1 PM

32°

45%

2 PM

34°

46%

3 PM

34°

52%

4 PM

34°

62%

5 PM

33°

72%

6 PM

31°

81%

7-Day Forecast

Tonight

37° 21°

Partly Cloudy with a 69% chance of rain.

Sun

35° 21°

Heavy Rain, 82% chance.

Mon

29° 20°

Overcast with a 90% chance of rain.

Tue

28° 18°

Rain, 68% chance.

Wed

28° 18°

Mostly Cloudy with a 37% chance of rain.

Thu

32° 19°

Drizzle, 51% chance.

Fri

34° 20°

Rain, 63% chance.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 31° Partly Cloudy 43% 8 mph SW 70%

8 PM 29° Mostly Cloudy 58% 7 mph W 78%

9 PM 28° Mostly Cloudy 54% 6 mph SW 79%

10 PM 26° Mostly Cloudy 69% 6 mph WSW 82%

11 PM 26° Overcast 44% 4 mph WSW 85%

12 AM 25° Mostly Cloudy 60% 4 mph SSW 87%

1 AM 24° Rain 44% 4 mph S 88%

2 AM 24° Mostly Cloudy 26% 3 mph S 89%

3 AM 23° Mostly Cloudy 11% 2 mph SW 89%

4 AM 23° Mostly Cloudy 8% 3 mph WNW 90%

5 AM 21° Mostly Cloudy 9% 4 mph WNW 90%

6 AM 21° Mostly Cloudy 9% 2 mph NW 89%

7 AM 22° Mostly Cloudy 3% 2 mph NE 88%

8 AM 23° Drizzle 22% 3 mph E 84%

9 AM 26° Rain 37% 3 mph E 78%

10 AM 27° Partly Cloudy 40% 4 mph ESE 72%

11 AM 28° Partly Cloudy 44% 4 mph ESE 69%

12 PM 29° Mostly Clear 45% 4 mph ESE 64%

1 PM 32° Mostly Clear 45% 4 mph SE 60%

2 PM 34° Mostly Clear 46% 4 mph SE 57%

3 PM 34° Mostly Clear 52% 4 mph ESE 56%

4 PM 34° Partly Cloudy 62% 4 mph ESE 55%

5 PM 33° Partly Cloudy 72% 4 mph ESE 57%

6 PM 31° Mostly Cloudy 81% 4 mph E 65%

15-Day Forecast

Today

7/4

Partly Cloudy

69%

21°

37°

Sun

7/5

Heavy Rain

82%

21°

35°

Mon

7/6

Overcast

90%

20°

29°

Tue

7/7

Rain

68%

18°

28°

Wed

7/8

Mostly Cloudy

37%

18°

28°

Thu

7/9

Drizzle

51%

19°

32°

Fri

7/10

Rain

63%

20°

34°

Sat

7/11

Drizzle

53%

18°

31°

Sun

7/12

Rain

68%

17°

29°

Mon

7/13

Rain

66%

17°

30°

Tue

7/14

Rain

63%

18°

32°

Wed

7/15

Drizzle

60%

17°

32°

Thu

7/16

Drizzle

60%

18°

32°

Fri

7/17

Drizzle

60%

18°

32°

Sat

7/18

Drizzle

60%

18°

32°

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

61 AQI 14.7 µg/m³

O₃

Ground-level ozone

49 AQI 53 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Sun 61 Moderate 49 61

Mon 53 Moderate 48 53

Tue 48 Good 44 48

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 Sat Jul 4, 22:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE1698 J/kg

MLCAPE1012 J/kg

MUCAPE1698 J/kg

SBCIN-301 J/kg

MLCIN0 J/kg

Lifted Index-5.6

Kinematics

0–6 km Shear18 kt

0–1 km Shear5 kt

Eff. Shear14 kt

0–1 km SRH-9

0–3 km SRH-47

Eff. SRH-38

Storm Motion209° @ 25 kt

0–1 km EHI-0.1

Composite Parameters

Sig. Tornado0.0

STP (eff)0.0

Supercell0.0

K-Index33.9

Thermo & Levels

PWAT1.63 in

0–3 km LR6.8 °C/km

700–500 LR6.4 °C/km

Total Totals52.3

LCL867 hPa

LFC747 hPa

EL165 hPa

Freezing Lvl14,790 ft

Frederick County, Maryland, United States

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