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Weather Forecast for Frederick

Maryland, United States of America

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Partly cloudy

Current Weather - Frederick: 4°C

Maryland, United States of America

Partly cloudy

Feels like 3°C

Wind

5 km/h SW

Humidity

95%

Pressure

1021 mb

UV Index

0

Visibility

16 km
Sunny

Sunny

Monday, April 20, 2026

High

10°C

Low

1°C

Rain Chance

0%

Hourly Forecast

Clear 6°C
06:00
Sunny 6°C
07:00
Sunny 7°C
08:00
Overcast 8°C
09:00
Patchy rain nearby 8°C
10:00
Partly Cloudy 9°C
11:00
Partly Cloudy 9°C
12:00
Sunny 9°C
13:00
Overcast 9°C
14:00
Overcast 9°C
15:00
Overcast 9°C
16:00
Partly Cloudy 9°C
17:00
Partly Cloudy 8°C
18:00
Sunny 6°C
19:00
Clear 4°C
20:00
Clear 3°C
21:00
Clear 2°C
22:00
Clear 1°C
23:00
Apr 21

Day Statistics

Maximum Wind

27 km/h

Humidity

55%

Precipitation

0 mm

UV Index

6

Visibility

10 km

Rain Chance

0%

Snow Chance

0%

Sun & Moon

Sunrise

06:25 AM

Sunset

07:53 PM

Moonrise

08:16 AM

Moonset

No moonset

Moon Phase

Waxing Crescent

Moon Illumination

9%

Air Quality

PM2.5

5.3

μg/m³

PM10

5.7

μg/m³

NO₂

4.6

μg/m³

O₃

89.2

μg/m³

SO₂

3.9

μg/m³

CO

193.5

μg/m³

US EPA Index: 1 GB DEFRA Index: 1

Weather Alerts

Freeze Watch issued April 19 at 1:20PM EDT until April 21 at 10:00AM EDT by NWS Baltimore MD/Washington DC

Washington; Frederick; Carroll; Northern Baltimore; Cecil; Northwest Montgomery; Northwest Howard; Northwest Harford; Augusta; Rockingham; Shenandoah; Frederick; Page; Warren; Clarke; Greene; Madison; Rappahannock; Orange; Culpeper; Northern Fauquier; Southern Fauquier; Western Loudoun; Eastern Loudoun; Northern Virginia Blue Ridge; Central Virginia Blue Ridge; Northwest Prince William; Morgan; Berkeley; Jefferson Apr 19, 01:20 PM - Apr 19, 09:30 PM
Severity: Severe Urgency: Future

* WHAT...Sub-freezing temperatures as low as 26 to 30 degrees possible. * WHERE...Portions of central, north central, northeast, and northern Maryland, central, northern, northwest, and western Virginia, and panhandle West Virginia. * WHEN...From late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Take steps now to protect tender plants from the cold. To prevent water pipes from freezing, wrap or drain or allow them to drip slowly.

Event: Freeze Watch Certainty: Possible Category: Met

Freeze Watch issued April 19 at 12:33AM EDT until April 21 at 9:00AM EDT by NWS State College PA

Huntingdon; Mifflin; Juniata; Fulton; Franklin; Union; Snyder; Montour; Northumberland; Columbia; Perry; Dauphin; Schuylkill; Lebanon; Cumberland; Adams; York; Lancaster Apr 19, 12:33 AM - Apr 20, 03:15 AM
Severity: Severe Urgency: Future

* WHAT...Sub-freezing temperatures as low as 26 possible. * WHERE...A portion of central Pennsylvania. * WHEN...From late Monday night through Tuesday morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.

Those with agricultural interests should protect sensitive vegetation. Freezing temperatures could kill crops and other sensitive vegetation.

Event: Freeze Watch Certainty: Possible Category: Met