Conditions: Baltimore, Maryland, 12/17/2025 09:40:02 am
Temperature

33°

Mostly Cloudy

20°

Dew Point
Relative Humidity

58%

Feels Like

27°

Wind (SW)

7mph

Air Pressure

29.99

Sun
Sun Rise

07:20 AM

Sun Set

04:45 PM

Day Length

09:25 Hours

Difference

0 min 17 sec loss

Moon
Moon Rise

05:22 AM

Moon Set

02:42 PM

Next: New Moon

Dec 19,2025

Moon Phase

Waning Crescent

Climate
Average Low

28°

45°

Average High
Record Low


(1951)

68°


(1984)
Record High
Conditions

December 17 Seasonal Temps Will Feel Warm Leading To Heavy Rain And Friday Morning Storm Line

Maryland Weather
climate data
rain timeline
Forecast

Wednesday December 17

We are about to take a break from the unusually cold start to December. The latest update now shows Baltimore’s BWI at 9.2°F below average for the month.  The next two days will be closer to average and may feel warm relatively speaking.

This is ahead of our next storm, and there are a few things to focus on in the headlines.

HEADLINES

  • Seasonal Temps May Feel Warm
  • Thursday Morning Fog with Freezing Temps: Spots May Be Icy
  • Thursday: Rain arrives in the evening; Heavy Overnight
  • Friday: Morning Squall Line/T’Storm possible.  High Temps will be in the morning.
  • Weekend: Cooler back to near normal.

 

Temperature Deficit Dec 1 to 16

Baltimore is -9.2°F to date. Much of the region has been 10 to 15 degrees BELOW AVERAGE.

December 17 weather temperature deficit

Morning Temperatures

December 17 weather temperatures Wednesday morning

 

Morning Surface Weather

There will be a transition today with a shift of wind and temperatures warming back to near normal.

The next storm system will be racing in from the Western US.

December 17 weather map Wednesday morning

 

Storm Forecast Preview

Wednesday Afternoon to Friday Night

Temperatures will warm ahead of the storm. Rain arrives Thursday evening, heavy overnight, and may culminate with a storm line and possible thunder early Friday morning.

December 17 weather storm forecast

 

Afternoon Temperatures

December 17 weather forecast temperatures Wednesday afternoon

 

 

 

MOUNTAIN CAM:

WESTERN MARYLAND SNOW

This webcam is positioned at The Greene Turtle Deep Creek Lake and shows Wisp Resort, including a zoomed-in view of Squirrel Cage, The Face, the terrain park, Boulder, the mountain coaster, the tubing park and a shot of McHenry Cove at Deep Creek Lake!

 

CLIMATE DATA: Baltimore

Yesterday: Low 14F; High 36F

Precipitation: 

Season Snow Total: 2.0”

Top Wind Gust: 13 mph

TODAY December 17

Sunrise at 7:20 AM

Sunset at 4:46 PM

Normal Low in Baltimore:  29ºF

Record 5ºF in 1951

Normal High in Baltimore: 47ºF

Record 68ºF in 1984

Rainfall Deficit at BWI

  • Ending 2024 =  -8.00”
  • Since Jan 1 =  7.61”
  • We are STILL DOWN -15.61” INCLUDING LAST YEAR

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FAITH IN THE FLAKES STORE

NOW OPEN FOR THE SEASON

click here

 

 

THURSDAY

Relative Humidity Through Morning

When approaching 100%, fog may form.

December 17 relative humidity forecast

 

Morning Snapshot

December 17 humidity fog Thursday morning

 

Morning Temperatures

Temps near freezing with areas of fog could form a glaze of ice in spots.

December 17 weather temperatures Thursday morning

 

 

 

Afternoon Temperatures

December 17 weather forecast temperatures Thursday afternoon

 

 

 

STORM ARRIVING AFTER DARK

6 PM Thursday: Radar Simulation

Rain arrives from the South.

December 17 weather rain radar Thursday evening

 

 

6 PM Thursday to Noon Friday

Rain will be heavy at times overnight, culminating with the cold front Friday morning.

This squall line may have thunder and high winds.

December 17 weather rain radar forecast Thursday to Friday

 

6 AM Friday

The line of heavy rain and gusty winds will pass through Central Maryland before sunrise.

High Temperatures will be in the morning, then turning colder.

 

December 17 weather rain radar Friday morning

 

10 AM  Friday

As the squall line reaches the beaches, snow will return with a few coating to a couple of inches in the mountains.

December 17 weather rain radar Friday morning 10 AM

 

 

RAINFALL TOTAL POTENTIAL

Much of the region will get ‘close’ to 1 inch of rain.

This will wash away lot of snow and road salt.

December 17 weather rain total potential Friday

 

 

Looking Later In The Week

Jet Stream Forecast Friday to Christmas Eve

The core cold air will pass through Friday and then a less intense wave on Sunday. Next week a push of warm air will surge into the middle of the nation. We will be on the edge Christmas Eve.

December 17 weather jet stream forecast

 

FRIDAY

Colder air flows in behind the storm line.

December 17 weather jet stream forecast Friday

 

SUNDAY

The next Cold Pocket/Pattern Passing North.

December 17 weather jet stream forecast Sunday

 

 

CHRISTMAS EVE DAY

The clash zone between the cold in New England and the approaching warm is likely to break out as a region of overrunning precipitation. This may translate to a wintry mix.

This is more of a pattern likelihood, no specifics at this time, since it is over 1 week away.

December 17 weather jet stream forecast Christmas Eve

 

 

7 Day Forecast

  • Today: Seasonal, Late Clouds
  • Thursday = Rain By Evening; Heavy Overnight
  • Friday: Morning Rain, T’storm, Then COLDER Winds
  • Weekend Back Near Normal (whatever that is)
  • Christmas Eve: Simply SUGGESTION A Chance For A wintry mix in the region

December 17 weather forecast 7 day Wednesday

 

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Snow Report December 14  and Grade My Forecast

In case you missed it, click this image for brief summary of the final snow totals from the last event.

December 14 weather snow total Sunday

Snow Report December 5 to 6 and Grade My Forecast

In case you missed it, click this image for brief summary of the final snow totals from the last event.

December 6 weather snow analysis preliminary

 

 

My Winter Outlook For Above-Average Snow

Click here for the full report

Winter 2025 to 2026 My Call for Suggested Snowfall

 

 

La Niña Advisory

This was issued October 9, as expected: A weak and short-lived event to start winter may play a different role this winter.

October 9 La Nina Advisory map Pacific Ocean

In Case You Missed It

Woolly Bear Caterpillar Winter Folklore

These are NOT all the same caterpillar!

Woolly Bear Caterpillars And Imposters For Winter Weather Folklore

 

Winter Outlook From 2 Farmers’ Almanacs

Winter Outlooks 2025 to 2026 Two Farmers Almanacs

 

STEM Assemblies/In School Fields Trips Are Back

Click to see more and ‘Book’ a visit to your school

THANK YOU:

Baltimore Sun Magazine Readers’ Choice Best Of Baltimore

Best of Baltimore 2025 Meteorologist Justin Berk

Maryland Trek 12 Day 7 Completed Sat August 9

UPDATED: We raised OVER $170,000 for Just In Power Kids – AND Still Collecting More

The annual event: Hiking and biking 329 miles in 7 days between The Summit of Wisp to Ocean City.

Each day, we honor a kid and their family’s cancer journey.

Fundraising is for Just In Power Kids: Funding Free Holistic Programs. I never have and never will take a penny. It is all for our nonprofit to operate.

 

Click here or the image to donate:

Maryland Trek 12 Finish August 9 2025

RESTATING MY MESSAGE ABOUT DYSLEXIA

I am aware there are some spelling and grammar typos and occasional other glitches. I take responsibility for my mistakes and even the computer glitches I may miss. I have made a few public statements over the years, but if you are new here, you may have missed it: I have dyslexia and found out during my second year at Cornell University. It didn’t stop me from getting my meteorology degree and being the first to get the AMS CBM in the Baltimore/Washington region. One of my professors told me that I had made it that far without knowing and to not let it be a crutch going forward. That was Mark Wysocki, and he was absolutely correct! I do miss my mistakes in my own proofreading. The autocorrect spell check on my computer sometimes does an injustice to make it worse. I can also make mistakes in forecasting. No one is perfect at predicting the future. All of the maps and information are accurate. The ‘wordy’ stuff can get sticky.  There has been no editor who can check my work while writing and to have it ready to send out in a newsworthy timeline. Barbara Werner is a member of the web team that helps me maintain this site. She has taken it upon herself to edit typos when she is available. That could be AFTER you read this. I accept this and perhaps proves what you read is really from me… It’s part of my charm. #FITF

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