Montgomery County, Maryland, United States

Last updated: 9:10 PM CDT  ·  Refresh
20°C
Feels like 19°
Mostly Clear
▲ 29°  /  ▼ 16°
Wind
9 mph N
Humidity
83%
Dew Point
17°
Pressure
29.55 inHg
Visibility
10 mi
UV Index
0.0
Cloud Cover
20%
Sunrise
6:26 AM
Sunset
7:57 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Montgomery County is currently mostly clear at 20°C. Precipitation is likely — peak probability 51% around 10 PM. Sunrise: 6:26AM · Sunset: 7:57PM.

Alerts

No active alerts for this location.
39 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
20°
3%
11 PM
19°
21%
12 AM
19°
21%
1 AM
18°
14%
2 AM
18°
3%
3 AM
18°
3%
4 AM
17°
3%
5 AM
16°
3%
6 AM
16°
3%
7 AM
16°
3%
8 AM
17°
3%
9 AM
18°
3%
10 AM
20°
3%
11 AM
22°
5%
12 PM
23°
5%
1 PM
26°
5%
2 PM
27°
5%
3 PM
27°
11%
4 PM
27°
20%
5 PM
27°
32%
6 PM
26°
36%
7 PM
25°
36%
8 PM
24°
36%
9 PM
22°
50%
7-Day Forecast
Tonight
29° 16°
Mostly Clear.
Fri
28° 16°
Partly Cloudy with a 50% chance of rain.
Sat
24° 19°
Rain, 70% chance.
Sun
29° 18°
Mostly Cloudy with a 39% chance of rain.
Mon
28° 17°
Clear.
Tue
29° 17°
Rain, 61% chance.
Wed
30° 18°
Heavy Rain, 82% chance.
TimeTempConditionsPrecipWindHumidity
Now 20° Mostly Clear 3% 9 mph N 83%
11 PM 19° Clear 21% 8 mph N 84%
12 AM 19° Mostly Clear 21% 7 mph N 86%
1 AM 18° Partly Cloudy 14% 6 mph N 87%
2 AM 18° Partly Cloudy 3% 5 mph N 89%
3 AM 18° Partly Cloudy 3% 5 mph N 89%
4 AM 17° Partly Cloudy 3% 5 mph NNW 89%
5 AM 16° Mostly Cloudy 3% 6 mph NNW 91%
6 AM 16° Mostly Cloudy 3% 6 mph N 89%
7 AM 16° Mostly Cloudy 3% 6 mph N 88%
8 AM 17° Mostly Cloudy 3% 7 mph N 84%
9 AM 18° Partly Cloudy 3% 7 mph N 78%
10 AM 20° Partly Cloudy 3% 7 mph N 71%
11 AM 22° Mostly Clear 5% 6 mph N 65%
12 PM 23° Partly Cloudy 5% 5 mph N 60%
1 PM 26° Partly Cloudy 5% 4 mph NNE 55%
2 PM 27° Partly Cloudy 5% 4 mph NE 51%
3 PM 27° Mostly Clear 11% 4 mph NE 50%
4 PM 27° Mostly Clear 20% 4 mph NE 50%
5 PM 27° Mostly Clear 32% 4 mph NE 50%
6 PM 26° Mostly Clear 36% 4 mph ENE 54%
7 PM 25° Mostly Clear 36% 4 mph ENE 58%
8 PM 24° Partly Cloudy 36% 4 mph ENE 62%
9 PM 22° Mostly Cloudy 50% 4 mph ENE 66%
15-Day Forecast
Today
8/20
Mostly Clear
3%
16°
29°
Fri
8/21
Partly Cloudy
50%
16°
28°
Sat
8/22
Rain
70%
19°
24°
Sun
8/23
Mostly Cloudy
39%
18°
29°
Mon
8/24
Clear
3%
17°
28°
Tue
8/25
Rain
61%
17°
29°
Wed
8/26
Heavy Rain
82%
18°
30°
Thu
8/27
Rain
82%
19°
29°
Fri
8/28
Rain
68%
19°
31°
Sat
8/29
Rain
68%
19°
32°
Sun
8/30
Clear
60%
20°
32°
Mon
8/31
Drizzle
60%
20°
31°
Tue
9/1
Drizzle
60%
19°
30°
Wed
9/2
Drizzle
60%
19°
30°
Thu
9/3
Drizzle
60%
19°
29°
39
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

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

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
39 AQI 7.0 µg/m³
O3
Ground-level ozone
Dominant
39 AQI 43 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 39 Good 39 39
Sat 42 Good 42 31
Sun 28 Good 28 21
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. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Thu Aug 20, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE15 J/kg
MUCAPE0 J/kg
SBCIN—
MLCIN0 J/kg
Lifted Index5.0
Kinematics
0–6 km Shear35 kt
0–1 km Shear14 kt
Eff. Shear—
0–1 km SRH-84
0–3 km SRH-8
Eff. SRH—
Storm Motion307° @ 29 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index31.4
Thermo & Levels
PWAT1.70 in
0–3 km LR4.0 °C/km
700–500 LR5.3 °C/km
Total Totals41.1
LCL966 hPa
LFC—
EL—
Freezing Lvl14,501 ft