Cooler today and Friday, and then turn much colder by Saturday. Flakes fly in the mountains late Friday night & Saturday. Showers develop Halloween night, so get the "Trick-or-Treaters" in by 10 PM.

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WASHINGTON (WUSA9) -- Other than some patchy fog early, today will be nice and sunny with highs around 60ยบ. Friday starts with sun, but you can expect more clouds as the afternoon wears on, especially west. We should stay dry for "Trick-or-Treating" in most areas, except west of I-81 where a few showers are likely. Looks for evening temps in the low to mid 50s.

A stronger cold front moves through Friday night ushering in the coldest air of the season. Snow flakes will fly in the mountains Friday night and Saturday.

By Saturday, colder air and a storm system will combine to bring rain showers that could even mix with some wet snow flakes. Best chance for that will be well west and northwest of DC, in higher elevations.

Reminder: This weekend we end Daylight Saving Time as we "fall back" to Standard Time. That means you'll need to set the clocks back an hour Saturday night, but that's also meaning 1 extra hour of sleep! Please replace the batteries in your smoke & CO2 detectors.

Please check out our Severe Weather Guide.

TODAY:
Patchy Fog Early
Sunny & Cool

HIGH TEMPS: Around 60
WINDS: NW 5 - 10

TONIGHT:
Clear & Chilly
Patchy Fog Late

LOW TEMPS: 38 - 46
WINDS: Light

FRIDAY:
Some Morning Sunshine
Becoming Mostly Cloudy & Cool

HIGH TEMPS: 55 - 60
WINDS: ENE - 5

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