Observed 8:15 PM EDT at KGAI

Rockville, MD weather

Clear and 50°10°.

Mostly agree

Now 50°10°

Clear

Wind: Calm; Light through 8 AM
Dew point: 41°5°; Comfortable
UV tomorrow: 4Moderate; Moderate 11 AM–5 PM · peak 4
Air quality: 27Good; Ozone · tomorrow moderate
Pressure: 30.56 inHg1035 hPa; Rising slowly · +0.03 inHg+1.1 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Low 40°4° tomorrow at 6 AM
Above 50°10° tomorrow by 10 AM
High 65°18° tomorrow at 3 PM
Below 50°10° tomorrow night after 9 PM

TonightDown to 41°5° by 5 AM · Clear
Tomorrow morningUp to 56°13° by 11 AM · Clear
Tomorrow afternoonUp to 65°18° by 3 PM · Clear
Tomorrow nightDown to 42°6° by 4 AM · Clear
Monday morningUp to 57°14° by 11 AM · Clear
Monday afternoonUp to 68°20° by 3 PM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 8p	Clear	51°11° (likely 50°10° to 52°11°)	51°11°	0%	3 mph5 km/h from E, gusts 7 mph11 km/h	68%	13%	0
Sat 9p	Clear	48°9° (likely 48°9° to 50°10°)	47°8°	0%	3 mph5 km/h from E, gusts 5 mph8 km/h	77%	0%	0
Sat 10p	Clear	47°8° (likely 47°8° to 49°9°)	46°8°	0%	3 mph5 km/h from E, gusts 3 mph5 km/h	79%	0%	0
Sat 11p	Clear	46°8° (likely 46°8° to 49°9°)	45°7°	0%	3 mph5 km/h from E, gusts 5 mph8 km/h	83%	16%	0
Sun 12a	Clear	45°7° (likely 45°7° to 47°8°)	45°7°	0%	2 mph3 km/h from E, gusts 4 mph6 km/h	86%	15%	0
Sun 1a	Clear	44°7° (likely 44°7° to 46°8°)	44°7°	0%	2 mph3 km/h from NE, gusts 4 mph7 km/h	93%	15%	0
Sun 2a	Clear	43°6° (likely 43°6° to 45°7°)	43°6°	0%	2 mph3 km/h from NE, gusts 4 mph6 km/h	93%	13%	0
Sun 3a	Clear	42°6° (likely 42°6° to 44°7°)	42°6°	0%	2 mph3 km/h from NE, gusts 3 mph6 km/h	96%	7%	0
Sun 4a	Clear	42°6° (likely 42°6° to 43°6°)	42°6°	0%	2 mph3 km/h from NE, gusts 4 mph6 km/h	93%	0%	0
Sun 5a	Clear	41°5° (likely 41°5° to 43°6°)	41°5°	0%	2 mph3 km/h from NE, gusts 4 mph6 km/h	92%	1%	0
Sun 6a	Clear	40°4° (likely 40°4° to 42°6°)	40°4°	0%	2 mph3 km/h from NE, gusts 4 mph7 km/h	96%	5%	0
Sun 7a	Sunny	40°4° (likely 39°4° to 41°5°)	40°4°	0%	2 mph3 km/h from NE, gusts 4 mph7 km/h	96%	1%	0
Sun 8a	Sunny	41°5° (likely 39°4° to 42°6°)	41°5°	0%	2 mph3 km/h from N, gusts 4 mph7 km/h	92%	1%	0
Sun 9a	Sunny	45°7° (likely 44°7° to 47°8°)	45°7°	0%	1 mph2 km/h from NE, gusts 5 mph8 km/h	89%	1%	1
Sun 10a	Sunny	52°11° (likely 52°11° to 54°12°)	52°11°	0%	1 mph2 km/h from S, gusts 5 mph8 km/h	74%	2%	2
Sun 11a	Sunny	56°13° (likely 56°13° to 59°15°)	56°13°	0%	1 mph2 km/h from E, gusts 6 mph9 km/h	66%	5%	3
Sun 12p	Sunny	59°15° (likely 59°15° to 61°16°)	59°15°	0%	1 mph2 km/h from SE, gusts 6 mph9 km/h	57%	5%	4
Sun 1p	Sunny	61°16° (likely 61°16° to 63°17°)	61°16°	0%	1 mph2 km/h from SE, gusts 5 mph7 km/h	53%	4%	4
Sun 2p	Sunny	63°17° (likely 62°17° to 65°18°)	63°17°	0%	2 mph3 km/h from S, gusts 5 mph8 km/h	48%	5%	4
Sun 3p	Sunny	65°18° (likely 63°17° to 65°18°)	65°18°	0%	2 mph3 km/h from S, gusts 7 mph11 km/h	45%	7%	4
Sun 4p	Sunny	64°18° (likely 63°17° to 65°18°)	64°18°	0%	2 mph3 km/h from S, gusts 7 mph12 km/h	45%	6%	3
Sun 5p	Sunny	64°18° (likely 62°17° to 64°18°)	64°18°	0%	2 mph3 km/h from SE, gusts 6 mph9 km/h	45%	3%	1
Sun 6p	Clear	61°16° (likely 58°14° to 62°17°)	61°16°	0%	1 mph2 km/h from SE, gusts 6 mph9 km/h	51%	0%	0
Sun 7p	Clear	57°14° (likely 55°13° to 57°14°)	57°14°	0%	1 mph2 km/h from SE, gusts 4 mph6 km/h	62%	0%	0
Sun 8p	Clear	52°11° (likely 52°11° to 55°13°)	52°11°	0%	1 mph2 km/h from SE, gusts 4 mph6 km/h	77%	0%	0
Sun 9p	Clear	49°9° (likely 49°9° to 53°12°)	49°9°	0%	1 mph2 km/h from S, gusts 5 mph9 km/h	83%	0%	0
Sun 10p	Clear	48°9° (likely 48°9° to 51°11°)	48°9°	0%	1 mph2 km/h from S, gusts 6 mph10 km/h	89%	0%	0
Sun 11p	Clear	47°8° (likely 47°8° to 49°9°)	47°8°	0%	1 mph2 km/h from S, gusts 4 mph7 km/h	89%	0%	0
Mon 12a	Clear	46°8° (likely 46°8° to 48°9°)	46°8°	0%	1 mph2 km/h from S, gusts 5 mph7 km/h	93%	0%	0
Mon 1a	Clear	45°7° (likely 45°7° to 47°8°)	45°7°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	93%	0%	0
Mon 2a	Clear	44°7° (likely 44°7° to 46°8°)	44°7°	0%	1 mph2 km/h from W, gusts 4 mph6 km/h	93%	2%	0
Mon 3a	Clear	44°7° (likely 44°7° to 45°7°)	44°7°	0%	1 mph2 km/h from W, gusts 4 mph7 km/h	93%	0%	0
Mon 4a	Clear	42°6° (likely 42°6° to 45°7°)	42°6°	0%	1 mph2 km/h from W, gusts 5 mph8 km/h	96%	1%	0
Mon 5a	Clear	42°6° (likely 42°6° to 44°7°)	42°6°	0%	2 mph3 km/h from W, gusts 6 mph9 km/h	96%	7%	0
Mon 6a	Clear	42°6° (likely 41°5° to 44°7°)	42°6°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	93%	12%	0
Mon 7a	Sunny	41°5° (likely 41°5° to 43°6°)	41°5°	0%	2 mph3 km/h from W, gusts 6 mph10 km/h	96%	16%	0
Mon 8a	Sunny	42°6° (likely 40°4° to 43°6°)	42°6°	0%	2 mph3 km/h from W, gusts 7 mph11 km/h	93%	22%	0
Mon 9a	Sunny	46°8° (likely 44°7° to 48°9°)	45°7°	0%	3 mph5 km/h from W, gusts 7 mph11 km/h	86%	18%	1
Mon 10a	Sunny	52°11° (likely 51°11° to 54°12°)	52°11°	0%	5 mph8 km/h from W, gusts 11 mph17 km/h	74%	7%	2
Mon 11a	Sunny	57°14° (likely 57°14° to 58°14°)	57°14°	0%	5 mph8 km/h from W, gusts 10 mph17 km/h	64%	3%	3
Mon 12p	Sunny	61°16° (likely 61°16° to 62°17°)	61°16°	0%	5 mph8 km/h from W, gusts 10 mph16 km/h	56%	0%	4
Mon 1p	Sunny	64°18° (likely 64°18° to 66°19°)	64°18°	0%	6 mph10 km/h from NW, gusts 10 mph17 km/h	52%	0%	4
Mon 2p	Sunny	66°19° (likely 66°19° to 67°19°)	66°19°	0%	6 mph10 km/h from NW, gusts 10 mph16 km/h	48%	0%	4
Mon 3p	Sunny	68°20° (likely 66°19° to 68°20°)	68°20°	0%	6 mph10 km/h from NW, gusts 11 mph18 km/h	45%	0%	4
Mon 4p	Sunny	68°20° (likely 65°18° to 68°20°)	68°20°	0%	6 mph10 km/h from NW, gusts 11 mph18 km/h	47%	0%	3
Mon 5p	Sunny	68°20° (likely 64°18° to 68°20°)	68°20°	0%	5 mph8 km/h from NW, gusts 11 mph17 km/h	49%	0%	1
Mon 6p	Clear	65°18° (likely 60°16° to 65°18°)	65°18°	0%	3 mph5 km/h from NW, gusts 6 mph9 km/h	54%	0%	0
Mon 7p	Clear	61°16° (likely 55°13° to 61°16°)	61°16°	0%	2 mph3 km/h from NW, gusts 4 mph6 km/h	62%	0%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Mostly sunny. High 62°17°, low 39°4°. Typical 65°18° / 44°7°. Dry. Mostly agree.
1. Evening
  6 PM–midnight
  Clear, 51°11°
  Dry
2. Overnight
  midnight–6 AM
  Clear, 41°5°
  Dry
Official NWS forecast
Tonight: Mostly clear, with a low around 39. Northeast wind around 3 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
61°16°–64°18°
Low, likely
37°3°–39°4°
Typical high / low
65°18° / 44°7°
Wind
8 mph12 km/h, gusts 15 mph23 km/h
UV peak
4
Tomorrow, Oct 25. Sunny. High 65°18°, low 40°4°. Typical 65°18° / 43°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 41°5°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 42°6°
  Dry
Official NWS forecast
Day: Sunny, with a high near 65. Southeast wind around 2 mph.
Night: Clear, with a low around 40. Southwest wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–65°18°
Low, likely
39°4°–41°5°
Typical high / low
65°18° / 43°6°
Wind
5 mph9 km/h
UV peak
4
Monday, Oct 26. Mostly sunny. High 69°21°, low 47°8°. Typical 64°18° / 43°6°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 42°6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Official NWS forecast
Day: Sunny, with a high near 69. Northwest wind 2 to 6 mph.
Night: Mostly clear, with a low around 47. Northwest wind around 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
66°19°–69°21°
Low, likely
40°4°–47°8°
Typical high / low
64°18° / 43°6°
Wind
7 mph11 km/h, gusts 15 mph24 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 67°19°, low 46°8°. Typical 64°18° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 66°19°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 47°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 67.
Night: Mostly clear, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–68°20°
Low, likely
46°8°–49°9°
Typical high / low
64°18° / 42°6°
Wind
8 mph13 km/h, gusts 19 mph31 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 65°18°, low 48°9°. Typical 64°18° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 47°8°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 63°17°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 55°13°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 65.
Night: Mostly cloudy, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
62°17°–65°18°
Low, likely
44°7°–48°9°
Typical high / low
64°18° / 42°6°
Wind
7 mph11 km/h, gusts 15 mph25 km/h
UV peak
4
Thursday, Oct 29. Partly sunny. High 70°21°, low 49°9°. Typical 63°17° / 42°6°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 68°20°
  Dry
3. Evening
  6 PM–midnight
  Clear, 58°14°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 50°10°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 70.
Night: Mostly clear, with a low around 49.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–70°21°
Low, likely
46°8°–49°9°
Typical high / low
63°17° / 42°6°
Wind
6 mph9 km/h, gusts 22 mph36 km/h
UV peak
4
Friday, Oct 30. Mostly sunny. High 73°23°, low 50°10°. Typical 63°17° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 49°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 74°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 62°17°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 53°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 73.
Night: Mostly clear, with a low around 50.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
73°23°–74°23°
Low, likely
45°7°–50°10°
Typical high / low
63°17° / 41°5°
Wind
5 mph8 km/h, gusts 13 mph21 km/h
UV peak
4
Saturday, Oct 31. Partly sunny. High 71°22°, low 50°10°. Typical 62°17° / 41°5°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 55°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 71.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
64°18°–72°22°
Low, likely
47°8°–56°13°
Typical high / low
62°17° / 41°5°
Wind
7 mph12 km/h, gusts 16 mph26 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 70°21°, low 53°12°. Typical 62°17° / 41°5°. Rain 0.02 in0.5 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 54°12°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  30% chance
3. Evening
  6 PM–midnight
  Drizzle, 65°18°
  30% chance · 0.06 in1.4 mm
4. Overnight
  midnight–6 AM
  Drizzle, 61°16°
  30% chance · 0.14 in3.5 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
67°19°–73°23°
Low, likely
50°10°–56°13°
Typical high / low
62°17° / 41°5°
Wind
10 mph15 km/h, gusts 28 mph45 km/h
UV peak
4
Monday, Nov 2. Showers. High 73°23°, low 59°15°. Typical 62°17° / 40°4°. Rain 0.49 in12 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 62°17°
  30% chance · 0.11 in2.8 mm
2. Afternoon
  noon–6 PM
  Drizzle, 73°23°
  Dry
3. Evening
  6 PM–midnight
  Clear, 63°17°
  20% chance · 0.27 in6.8 mm
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
70°21°–77°25°
Low, likely
56°13°–66°19°
Typical high / low
62°17° / 40°4°
Wind
17 mph27 km/h, gusts 37 mph60 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 62°, low 39°.
Tomorrow
Dry, high 65°, low 40°, warming up.
Monday
Dry, high 69°, low 47°, warming up.
Rest of week
Mostly dry, highs 65–73°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (LWX) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Potomac River near Washington DC (Little Falls)

9.4 mi

Below flood stage

Level: 3.1 ft
Flow: 3,400 cfs

Forecast peak 3.1 ft Sat 8 PM

Reading from Sat 6:50 PM · NWS gauge page

Seneca Creek at Dawsonville

10 mi

Below flood stage

Level: 2.0 ft
Flow: 59 cfs

Forecast peak 2.0 ft Sat 8 PM

Reading from Sat 6:50 PM · NWS gauge page

Turkey Branch near Aspen Hill

4.1 mi

Below flood stage

Level: 4.3 ft
Flow: under 1 cfs

Reading from Sat 7:15 PM · NWS gauge page

Northwest Branch at Kemp Mill

6.9 mi

Below flood stage

Level: 1.4 ft
Flow: 2 cfs

Reading from Sat 6:45 PM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 68% less heating than a typical week.

This week 27Typical 83

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 23
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 11 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 41°F).

Open the windows?

Sun, 1:00 PM–6:00 PM

Good stretch to open the windows.

Is this typical?

BELTSVILLE · official normals 1991–2020 · records 1941–2026

Oct 24, today vs a typical year

Today’s expected high is 3°2° colder than typical.

Last 7 days vs normal

—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24
—SunOct 25

Rockville weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 50 min; Losing 2 min 25 s a day; shortest Dec 21, 1 h 25 min less
Golden hour: 5:40–6:34 PM; Morning 7:10–8:04 AM
Blue hour: 6:34–6:44 PM; Morning 7:00–7:10 AM; first light 7:00 AM

Stars tonight? Fair

Clear 8:36 PM–7:01 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:40 AM · rises 5:13 PM
Full moon: Oct 26
New moon: Nov 9

Looking west from Rockville. The highest point on the skyline is about 2,700 ft, 35 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Rockville, MD weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Potomac River near Washington DC (Little Falls)

Seneca Creek at Dawsonville

Turkey Branch near Aspen Hill

Northwest Branch at Kemp Mill

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon