WXSIM Forecast for: Thurmont
Issued by: Ammenheuser Weather
Updated: Sunday, 19-Jul-2026 08:53 pm
 
Tonight

Clear
Clear
Monday

Sunny
Sunny
Monday
night
Chance rain
Chance rain
Tuesday

Thunder storm
Thunder storm
Tuesday
night
Rain likely
Rain likely
Wednesday

Fog a.m.
Fog a.m.
Wednesday
night
Clear
Clear
Thursday

Sunny
Sunny
.1 in. .5 in. .35 in.
Low: 61° High: 85° Low: 67° High: 83° Low: 69° High: 79° Low: 57° High: 77°
               
NE
3
mph
Light air
E→SSW
3
mph
Light air
SE
6
mph
Light breeze
S→SW
6-17
mph
Moderate breeze
SW
5
mph
Light breeze
WNW
12-22
mph
Fresh breeze
NW
9-21→3
mph
Fresh breeze
NNW→NE
3
mph
Light air
UV: 8
 Very High 
UV: 6
 High 
UV: 8
 Very High 
UV: 8
 Very High 

 

Tonight
 
Clear. Relatively cool. Low 61°. Wind northeast around 3 mph.
Monday
 
Sunny. High 85°. UV index up to 8. Wind east around 3 mph in the morning, becoming south-southwest in the afternoon.
Monday night
 
Mostly cloudy in the evening, becoming cloudy after midnight. Patchy light fog after midnight. A chance of rain after midnight. Low 67°. Wind southeast around 6 mph. Chance of precipitation 50 percent. Precipitation mostly around a tenth of an inch.
Tuesday
 
Cloudy in the morning, becoming mostly cloudy to cloudy in the afternoon. Light to moderate fog in the morning, then moderate fog in the afternoon. A chance of rain in the morning, then rain likely in the afternoon. Scattered thundershowers possible. High 83°. UV index up to 6. Wind south around 6 mph, gusting to 17 mph, in the morning, becoming southwest in the afternoon. Chance of precipitation 80 percent. Precipitation mostly around half an inch.
Tuesday night
 
Partly cloudy in the evening, becoming fair to partly cloudy after midnight. Moderate fog. Rain likely. Precipitation showery or intermittent. Low 69°. Wind southwest around 5 mph. Chance of precipitation 60 percent. Precipitation mostly between a quarter and half an inch.
Wednesday
 
Partly to mostly cloudy in the morning, becoming mostly sunny in the afternoon. Patchy light fog in the morning. Breezy. High 79°. UV index up to 8. Wind west-northwest around 12 mph, gusting to 22 mph.
Wednesday night
 
Clear. Relatively cool. Low 57°. Wind northwest around 9 mph, gusting to 21 mph, in the evening, becoming 3 mph after midnight.
Thursday
 
Sunny. High 77°. UV index up to 8. Wind north-northwest around 3 mph in the morning, becoming northeast in the afternoon.
Thursday night
 
Clear. Relatively cool. Low 57°. Wind northeast around 2 mph in the evening, becoming north after midnight.

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