Monocacy River near Frederick at Interstate 70
9.4 mi- Level
- 1.7 ft
- Flow
- 173 cfs
Forecast peak 1.7 ft Sat 8 PM
Reading from Sat 4:30 PM · NWS gauge page
1 active weather alert
Frost Advisory
Starts in 7 h 4 min
- When
- From 1 AM to 9 AM EDT Sunday.
- Where
- Portions of central, northeast, and northern Maryland and northern Virginia.
Issued for this forecast zone · National Weather Service Baltimore MD/Washington DC
What, impacts and precautionsHide details
What
Temperatures as low as 33 will result in frost formation.
Impacts
Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered.
Precautionary actions
Take steps now to protect tender plants from the cold.
Areas: Frederick; Carroll; Northern Baltimore; Cecil; Northwest Montgomery; Northwest Howard; Northwest Harford; Southeast Harford; Rappahannock; Culpeper; Northern Fauquier; Southern Fauquier; Western Loudoun; Eastern Loudoun; Northwest Prince William; Central and Southeast Prince William/Manassas/Manassas Park
See it on weather.gov (opens in a new tab)
Observed 4:54 PM EDT at KRSP
Middletown, MD weather
Sunny and 55°13°, jacket by 7 PM.
Today: low 35°2° (likely 35°2° to 40°4°), high 61°16° (likely 60°16° to 61°16°).
Now 55°13°
Sunny
- Wind
- 5 mph8 km/h
- From the southeast. Up to 5 mph8 km/h through 5 AM
- Dew point
- 47°8°
- Comfortable · down to 38°3° by 11 PM
- UV tomorrow
- 4Moderate
- Moderate 11 AM–5 PM · peak 4
- Air quality
- 32Good
- Ozone · tomorrow moderate
Next 2 hours
No precipitation expected in the next 2 hours.
From forecast models
Next 48 hours
Good hours for
TonightDown to 38°3° by 4 AM · Clear
Tomorrow morningUp to 53°12° by 11 AM · Clear
Tomorrow afternoonUp to 63°17° by 4 PM · Clear
Tomorrow nightDown to 39°4° by 5 AM · Clear
Monday morningUp to 55°13° by 11 AM · Clear
Monday afternoonUp to 69°21° by 4 PM · Clear
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Sat 5p | Sunny | 60°16° (likely 59°15° to 60°16°) | 60°16° | 0% | 5 mph8 km/h from SE, gusts 7 mph12 km/h | 46% | 0% | 1 |
| Sat 6p | Clear | 57°14° (likely 55°13° to 57°14°) | 57°14° | 0% | 3 mph5 km/h from E, gusts 7 mph11 km/h | 51% | 2% | 0 |
| Sat 7p | Clear | 53°12° (likely 52°11° to 53°12°) | 53°12° | 0% | 3 mph5 km/h from E, gusts 7 mph10 km/h | 59% | 3% | 0 |
| Sat 8p | Clear | 49°9° (likely 49°9° to 52°11°) | 48°9° | 0% | 3 mph5 km/h from E, gusts 7 mph11 km/h | 68% | 4% | 0 |
| Sat 9p | Clear | 47°8° (likely 47°8° to 51°11°) | 46°8° | 0% | 3 mph5 km/h from E, gusts 7 mph12 km/h | 74% | 8% | 0 |
| Sat 10p | Clear | 46°8° (likely 46°8° to 50°10°) | 46°8° | 0% | 2 mph3 km/h from SE, gusts 8 mph13 km/h | 76% | 8% | 0 |
| Sat 11p | Clear | 44°7° (likely 44°7° to 49°9°) | 44°7° | 0% | 2 mph3 km/h from SE, gusts 7 mph11 km/h | 79% | 0% | 0 |
| Sun 12a | Clear | 43°6° (likely 43°6° to 48°9°) | 43°6° | 0% | 2 mph3 km/h from SE, gusts 6 mph9 km/h | 86% | 0% | 0 |
| Sun 1a | Clear | 41°5° (likely 41°5° to 46°8°) | 41°5° | 0% | 1 mph2 km/h from SE, gusts 4 mph6 km/h | 89% | 0% | 0 |
| Sun 2a | Clear | 40°4° (likely 40°4° to 46°8°) | 40°4° | 0% | 1 mph2 km/h from SE, gusts 4 mph7 km/h | 92% | 6% | 0 |
| Sun 3a | Clear | 39°4° (likely 39°4° to 46°8°) | 39°4° | 0% | 2 mph3 km/h from SE, gusts 4 mph7 km/h | 92% | 7% | 0 |
| Sun 4a | Clear | 38°3° (likely 38°3° to 46°8°) | 38°3° | 0% | 2 mph3 km/h from SE, gusts 4 mph7 km/h | 96% | 2% | 0 |
| Sun 5a | Clear | 38°3° (likely 38°3° to 46°8°) | 38°3° | 0% | 2 mph3 km/h from SE, gusts 4 mph7 km/h | 92% | 0% | 0 |
| Sun 6a | Clear | 37°3° (likely 37°3° to 46°8°) | 37°3° | 0% | 1 mph2 km/h from SE, gusts 3 mph5 km/h | 96% | 0% | 0 |
| Sun 7a | Clear | 37°3° (likely 37°3° to 45°7°) | 37°3° | 0% | 1 mph2 km/h from SE, gusts 5 mph8 km/h | 96% | 1% | 0 |
| Sun 8a | Sunny | 38°3° (likely 38°3° to 45°7°) | 38°3° | 0% | 2 mph3 km/h from SE, gusts 4 mph6 km/h | 96% | 1% | 0 |
| Sun 9a | Sunny | 42°6° (likely 42°6° to 49°9°) | 42°6° | 0% | 1 mph2 km/h from SE, gusts 4 mph7 km/h | 93% | 1% | 1 |
| Sun 10a | Sunny | 50°10° (likely 50°10° to 54°12°) | 50°10° | 0% | 1 mph2 km/h from S, gusts 6 mph10 km/h | 74% | 3% | 2 |
| Sun 11a | Sunny | 53°12° (likely 53°12° to 57°14°) | 53°12° | 0% | 1 mph2 km/h from S, gusts 6 mph9 km/h | 71% | 4% | 3 |
| Sun 12p | Sunny | 56°13° (likely 56°13° to 59°15°) | 56°13° | 0% | 1 mph2 km/h from S, gusts 8 mph12 km/h | 64% | 14% | 4 |
| Sun 1p | Sunny | 60°16° (likely 60°16° to 61°16°) | 60°16° | 0% | 2 mph3 km/h from S, gusts 8 mph12 km/h | 55% | 10% | 4 |
| Sun 2p | Sunny | 61°16° (likely 61°16° to 62°17°) | 61°16° | 0% | 2 mph3 km/h from S, gusts 8 mph13 km/h | 53% | 7% | 4 |
| Sun 3p | Sunny | 62°17° (likely 62°17° to 63°17°) | 62°17° | 0% | 2 mph3 km/h from S, gusts 8 mph13 km/h | 52% | 7% | 4 |
| Sun 4p | Sunny | 63°17° (likely 62°17° to 63°17°) | 63°17° | 0% | 3 mph5 km/h from S, gusts 8 mph12 km/h | 52% | 7% | 3 |
| Sun 5p | Sunny | 62°17° (likely 61°16° to 62°17°) | 62°17° | 0% | 3 mph5 km/h from S, gusts 8 mph12 km/h | 54% | 2% | 1 |
| Sun 6p | Clear | 59°15° (likely 58°14° to 59°15°) | 59°15° | 0% | 2 mph3 km/h from S, gusts 6 mph10 km/h | 60% | 0% | 0 |
| Sun 7p | Clear | 55°13° (likely 54°12° to 55°13°) | 55°13° | 0% | 1 mph2 km/h from S, gusts 5 mph8 km/h | 66% | 0% | 0 |
| Sun 8p | Clear | 52°11° (likely 52°11° to 53°12°) | 52°11° | 0% | 1 mph2 km/h from S, gusts 4 mph6 km/h | 74% | 0% | 0 |
| Sun 9p | Clear | 48°9° (likely 48°9° to 52°11°) | 48°9° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 83% | 0% | 0 |
| Sun 10p | Clear | 47°8° (likely 47°8° to 51°11°) | 47°8° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 83% | 0% | 0 |
| Sun 11p | Clear | 44°7° (likely 44°7° to 51°11°) | 44°7° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 93% | 0% | 0 |
| Mon 12a | Clear | 43°6° (likely 43°6° to 49°9°) | 43°6° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 93% | 6% | 0 |
| Mon 1a | Clear | 43°6° (likely 43°6° to 48°9°) | 43°6° | 0% | 1 mph2 km/h from S, gusts 3 mph5 km/h | 93% | 2% | 0 |
| Mon 2a | Clear | 41°5° (likely 41°5° to 48°9°) | 41°5° | 0% | 1 mph2 km/h from S, gusts 4 mph6 km/h | 100% | 3% | 0 |
| Mon 3a | Clear | 40°4° (likely 40°4° to 47°8°) | 40°4° | 0% | 1 mph2 km/h from SW, gusts 4 mph6 km/h | 100% | 4% | 0 |
| Mon 4a | Clear | 40°4° (likely 40°4° to 47°8°) | 40°4° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 96% | 0% | 0 |
| Mon 5a | Clear | 39°4° (likely 39°4° to 46°8°) | 39°4° | 0% | 1 mph2 km/h from SW, gusts 6 mph9 km/h | 96% | 0% | 0 |
| Mon 6a | Clear | 38°3° (likely 38°3° to 45°7°) | 38°3° | 0% | 1 mph2 km/h from S, gusts 6 mph10 km/h | 100% | 0% | 0 |
| Mon 7a | Clear | 38°3° (likely 38°3° to 45°7°) | 38°3° | 0% | 2 mph3 km/h from NW, gusts 7 mph11 km/h | 96% | 12% | 0 |
| Mon 8a | Sunny | 38°3° (likely 38°3° to 44°7°) | 38°3° | 0% | 2 mph3 km/h from NW, gusts 8 mph12 km/h | 100% | 13% | 0 |
| Mon 9a | Sunny | 42°6° (likely 42°6° to 48°9°) | 42°6° | 0% | 2 mph3 km/h from NW, gusts 7 mph12 km/h | 96% | 10% | 1 |
| Mon 10a | Sunny | 49°9° (likely 49°9° to 54°12°) | 48°9° | 0% | 3 mph5 km/h from W, gusts 12 mph19 km/h | 80% | 1% | 2 |
| Mon 11a | Sunny | 55°13° (likely 55°13° to 60°16°) | 55°13° | 0% | 3 mph5 km/h from W, gusts 10 mph16 km/h | 69% | 0% | 3 |
| Mon 12p | Sunny | 59°15° (likely 59°15° to 63°17°) | 59°15° | 0% | 3 mph5 km/h from NW, gusts 10 mph17 km/h | 60% | 0% | 4 |
| Mon 1p | Sunny | 63°17° (likely 62°17° to 65°18°) | 63°17° | 0% | 5 mph8 km/h from NW, gusts 10 mph16 km/h | 54% | 0% | 4 |
| Mon 2p | Sunny | 66°19° (likely 64°18° to 67°19°) | 66°19° | 0% | 6 mph10 km/h from NW, gusts 11 mph18 km/h | 50% | 1% | 4 |
| Mon 3p | Sunny | 68°20° (likely 65°18° to 68°20°) | 68°20° | 0% | 7 mph11 km/h from NW, gusts 13 mph20 km/h | 47% | 2% | 4 |
| Mon 4p | Sunny | 69°21° (likely 65°18° to 69°21°) | 69°21° | 0% | 5 mph8 km/h from NW, gusts 12 mph19 km/h | 49% | 0% | 3 |
Days ahead
Tap a day for its hours and the official wording.
Today, Oct 24. Sunny. High 61°16°, low 35°2°. Dry. Forecasts agree.
Evening
6 PM–midnight
Clear, 49°9°Dry
Overnight
midnight–6 AM
Clear, 38°3°Dry
Official NWS forecast
Today: Sunny, with a high near 61. Southeast wind around 5 mph.
Tonight: Clear, with a low around 35. Southeast wind around 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 60°16°–61°16°
- Low, likely
- 35°2°–40°4°
- Wind
- 8 mph12 km/h, gusts 16 mph25 km/h
- UV peak
- 4
Tomorrow, Oct 25. Sunny. High 63°17°, low 36°2°. Dry. Forecasts agree.
Morning
6 AM–noon
Sunny, 38°3°Dry
Afternoon
noon–6 PM
Sunny, 63°17°Dry
Evening
6 PM–midnight
Clear, 52°11°Dry
Overnight
midnight–6 AM
Clear, 39°4°Dry
Official NWS forecast
Day: Patchy frost before 8am. Sunny, with a high near 63. South wind around 3 mph.
Night: Mostly clear, with a low around 36. South wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
- High, likely
- 62°17°–63°17°
- Low, likely
- 36°2°–45°7°
- Wind
- 7 mph11 km/h, gusts 13 mph22 km/h
- UV peak
- 4
Monday, Oct 26. Mostly sunny. High 70°21°, low 46°8°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 38°3°Dry
Afternoon
noon–6 PM
Sunny, 69°21°Dry
Evening
6 PM–midnight
Clear, 55°13°Dry
Overnight
midnight–6 AM
Clear, 50°10°Dry
Official NWS forecast
Day: Sunny, with a high near 70. West wind 1 to 7 mph.
Night: Mostly clear, with a low around 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 66°19°–70°21°
- Low, likely
- 39°4°–46°8°
- Wind
- 8 mph14 km/h, gusts 17 mph27 km/h
- UV peak
- 4
Tuesday, Oct 27. Mostly sunny. High 67°19°, low 43°6°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 49°9°Dry
Afternoon
noon–6 PM
Partly sunny, 65°18°Dry
Evening
6 PM–midnight
Clear, 54°12°Dry
Overnight
midnight–6 AM
Cloudy, 45°7°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 67.
Night: Partly cloudy, with a low around 43.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 64°18°–67°19°
- Low, likely
- 43°6°–51°11°
- Wind
- 8 mph13 km/h, gusts 17 mph27 km/h
- UV peak
- 4
Wednesday, Oct 28. Cloudy. High 65°18°, low 46°8°. Dry. Mostly agree.
Morning
6 AM–noon
Cloudy, 45°7°Dry
Afternoon
noon–6 PM
Cloudy, 62°17°Dry
Evening
6 PM–midnight
Cloudy, 54°12°Dry
Overnight
midnight–6 AM
Cloudy, 48°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 46.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 61°16°–65°18°
- Low, likely
- 42°6°–46°8°
- Wind
- 9 mph14 km/h, gusts 18 mph28 km/h
- UV peak
- 4
Thursday, Oct 29. Cloudy. High 71°22°, low 48°9°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 47°8°Dry
Afternoon
noon–6 PM
Sunny, 67°19°Dry
Evening
6 PM–midnight
Clear, 56°13°Dry
Overnight
midnight–6 AM
Clear, 49°9°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 71.
Night: Mostly clear, with a low around 48.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 65°18°–71°22°
- Low, likely
- 44°7°–48°9°
- Wind
- 8 mph12 km/h, gusts 21 mph34 km/h
- UV peak
- 4
Friday, Oct 30. Mostly sunny. High 74°23°, low 50°10°. Dry. Mostly agree.
Morning
6 AM–noon
Sunny, 49°10°Dry
Afternoon
noon–6 PM
Sunny, 73°23°Dry
Evening
6 PM–midnight
Clear, 60°16°Dry
Overnight
midnight–6 AM
Clear, 50°10°Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 74.
Night: Mostly clear, with a low around 50.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
- High, likely
- 71°22°–74°23°
- Low, likely
- 45°7°–51°11°
- Wind
- 9 mph14 km/h, gusts 21 mph33 km/h
- UV peak
- 4
Saturday, Oct 31. Cloudy. High 68°20°, low 48°9°. Dry. Forecasts differ.
Morning
6 AM–noon
Mostly sunny, 49°9°Dry
Afternoon
noon–6 PM
Cloudy, 69°20°Dry
Evening
6 PM–midnight
Cloudy, 58°14°Dry
Overnight
midnight–6 AM
Partly cloudy, 52°11°Dry
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
- 63°17°–71°22°
- Low, likely
- 45°7°–51°11°
- Wind
- 9 mph14 km/h, gusts 22 mph36 km/h
- UV peak
- 4
Sunday, Nov 1. Drizzle. High 66°19°, low 51°11°. Rain 0.04 in1 mm, 30% chance. Forecasts differ.
Morning
6 AM–noon
Cloudy, 55°13°20% chance
Afternoon
noon–6 PM
Cloudy, 65°18°30% chance · 0.01 in0.3 mm
Evening
6 PM–midnight
Drizzle, 61°16°30% chance · 0.1 in2.6 mm
Overnight
midnight–6 AM
Drizzle, 60°16°30% chance · 0.11 in2.8 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
- 61°16°–71°22°
- Low, likely
- 48°9°–54°12°
- Wind
- 10 mph16 km/h, gusts 24 mph38 km/h
- UV peak
- 1
Monday, Nov 2. Drizzle. High 69°21°, low 56°13°. Rain 0.78 in20 mm, 30% chance. Forecasts differ.
Morning
6 AM–noon
Drizzle, 62°16°30% chance · 0.04 in1 mm
Afternoon
noon–6 PM
Drizzle, 68°20°Dry
Evening
6 PM–midnight
Drizzle, 61°16°20% chance · 0.67 in17 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
- 61°16°–73°23°
- Low, likely
- 51°11°–64°18°
- Wind
- 17 mph28 km/h, gusts 34 mph54 km/h
The outlook
Today
Dry, high 61°, low 35°.
Tomorrow
Dry, high 63°, low 36°.
Monday
Dry, high 70°, low 46°, warming up.
Rest of week
Mostly dry, highs 65–74°.
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
Rivers
NOAA river gauges within 25 mi
Below flood stage
Antietam Creek near Sharpsburg
10 mi- Level
- 2.4 ft
- Flow
- 100 cfs
Forecast peak 2.3 ft Sat 8 PM
Reading from Sat 4:15 PM · NWS gauge page
Potomac River at Point of Rocks
12 mi- Level
- 1.6 ft
- Flow
- 2,560 cfs
Forecast peak 1.6 ft Sun 2 AM
Reading from Sat 4:55 PM · NWS gauge page
Potomac River at Harpers Ferry
13 mi- Level
- 1.2 ft
- Flow
- 2,440 cfs
Forecast peak 1.1 ft Tue 8 AM
Reading from Sat 3:45 PM · NWS gauge page
Sun & moon
Sun
Sunrise 7:29 AM, sunset 6:18 PM.
- Daylight
- 10 h 49 min
- Losing 2 min 25 s a day; shortest Dec 21, 1 h 26 min less
- Golden hour
- 5:41–6:35 PM
- Morning 7:12–8:06 AM
- Blue hour
- 6:35–6:45 PM
- Morning 7:02–7:12 AM; first light 7:02 AM
Stars tonight? Fair
Clear 6:45 PM–7:03 AM, but the moon is 99% lit and up.
Moon
Waxing gibbous
98% lit · growing
- Today
- sets 5:41 AM · rises 5:15 PM
- Full moon
- Oct 26
- New moon
- Nov 9
