Hourly Weather Forecast - Letterkenny, Ulster, IE

12 AM
42°F
50%
7mph
WSW
50% Chance Rain Showers
Humidity
87%
Feels like
38°F
Dew Point
39°F
1 AM
42°F
50%
6mph
WSW
50% Chance Rain Showers
Humidity
84%
Feels like
39°F
Dew Point
38°F
2 AM
42°F
30%
5mph
WSW
30% Chance Rain Showers
Humidity
82%
Feels like
39°F
Dew Point
37°F
3 AM
42°F
30%
5mph
WSW
30% Chance Rain Showers
Humidity
82%
Feels like
39°F
Dew Point
37°F

Wind chill temperatures Monday A.M.

Cold Weather Chills the Nation Down to the Gulf

Extreme cold paired with their wind chill values will shiver much of the nation.

Snowfall forecast through Monday evening.

Mid-Atlantic, Great Lakes Snow Piles Up

Monday's Weather Outlook

Monday's Weather Outlook

How to Measure Snow via NWS

How To Measure Snow

Weekly Drought Map for December 11, 2025

Hit-or-Miss Precipitation Leads to Mixed Drought Results

A strong cold-air-damming event from March 20, 2018.

Cold Air Damming - Cause And Effects

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