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Deer Lodge, Montana 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Deer Lodge MT
National Weather Service Forecast for: Deer Lodge MT
Issued by: National Weather Service Missoula, MT
Updated: 3:30 am MDT Jul 20, 2025
 
This
Afternoon
This Afternoon: A slight chance of showers, with thunderstorms also possible after 3pm.  Mostly cloudy, with a high near 79. West wind 6 to 15 mph, with gusts as high as 21 mph.  Chance of precipitation is 20%.
Slight Chance
T-storms

Tonight

Tonight: A slight chance of showers and thunderstorms.  Mostly cloudy, with a low around 51. West northwest wind 9 to 14 mph becoming light and variable  in the evening. Winds could gust as high as 20 mph.  Chance of precipitation is 20%.
Slight Chance
T-storms then
Slight Chance
Showers
Monday

Monday: A 40 percent chance of showers and thunderstorms after noon.  Mostly cloudy, with a high near 78. Calm wind becoming north 5 to 7 mph in the morning.  New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Mostly Cloudy
then Chance
T-storms

Monday
Night
Monday Night: A chance of showers and thunderstorms before midnight, then a slight chance of showers.  Patchy fog after 3am.  Otherwise, mostly cloudy, with a low around 47. North wind 5 to 8 mph becoming calm  after midnight.  Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Slight Chance
Showers and
Patchy Fog
Tuesday

Tuesday: A 40 percent chance of showers and thunderstorms after noon.  Patchy fog before 8am.  Otherwise, partly sunny, with a high near 77. Calm wind becoming northwest 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.
Patchy Fog
then Chance
T-storms

Tuesday
Night
Tuesday Night: A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight.  Partly cloudy, with a low around 45. Chance of precipitation is 20%.
Slight Chance
T-storms then
Partly Cloudy

Wednesday

Wednesday: A 20 percent chance of showers and thunderstorms after noon.  Patchy fog before 8am.  Otherwise, mostly sunny, with a high near 79.
Patchy Fog
then Slight
Chance
T-storms
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 46.
Mostly Clear


Thursday

Thursday: Sunny, with a high near 87.
Sunny


Hi 79 °F Lo 51 °F Hi 78 °F Lo 47 °F Hi 77 °F Lo 45 °F Hi 79 °F Lo 46 °F Hi 87 °F

 

This Afternoon
 
A slight chance of showers, with thunderstorms also possible after 3pm. Mostly cloudy, with a high near 79. West wind 6 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Tonight
 
A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 51. West northwest wind 9 to 14 mph becoming light and variable in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Monday
 
A 40 percent chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 78. Calm wind becoming north 5 to 7 mph in the morning. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
 
A chance of showers and thunderstorms before midnight, then a slight chance of showers. Patchy fog after 3am. Otherwise, mostly cloudy, with a low around 47. North wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
 
A 40 percent chance of showers and thunderstorms after noon. Patchy fog before 8am. Otherwise, partly sunny, with a high near 77. Calm wind becoming northwest 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.
Tuesday Night
 
A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Partly cloudy, with a low around 45. Chance of precipitation is 20%.
Wednesday
 
A 20 percent chance of showers and thunderstorms after noon. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 79.
Wednesday Night
 
Mostly clear, with a low around 46.
Thursday
 
Sunny, with a high near 87.
Thursday Night
 
Mostly clear, with a low around 50.
Friday
 
Sunny, with a high near 87.
Friday Night
 
Partly cloudy, with a low around 50.
Saturday
 
Mostly sunny, with a high near 87.

 

Forecast from NOAA-NWS for Deer Lodge MT.

Weather Forecast Discussion
330
FXUS65 KMSO 201905
AFDMSO

Area Forecast Discussion
National Weather Service Missoula MT
105 PM MDT Sun Jul 20 2025

.DISCUSSION...

KEY MESSAGES:

-  Well below normal high temperatures and increasing rain and
   storm potential on Monday

-  Monday storms could produce moderate to heavy showers with
   concerns for localized flooding/ debris flows along US-95 and
   US-12 in north-central ID

-  Widespread showers and thunderstorms on Tuesday

Similar to Saturday the region remains cooler than normal with
clouds. The exception is southwest MT where breezy afternoon winds
may combine with low humidities to produce near critical fire
weather concerns. These conditions will continue, for only
southwest MT, on Monday with the addition that any thunderstorms
that develop during the afternoon will be capable of gusty outflow
winds up to 50 mph.

This evening the first showers are expected in north-central ID.
The models continue to demonstrate a stationary boundary
developing between north-central ID and west-central MT. Afternoon
showers and thunderstorms may become enhanced along this boundary
on Monday, with high resolution models suggesting rain rates of
0.50 to 0.75 inches per hour. The models have been very consistent
demonstrating this as a very narrow boundary. For many this will
be feast or famine in regards to precipitation amounts. There is
some concern that these rates could produce localized flash
flooding or debris flows along the US-95 corridor south of
Grangeville. We will continue to monitor the evolution of future
forecasts. By Tuesday, the trough will move over northwest MT and
widespread showers and thunderstorms are expected north of I-90.

Overall precipitation amounts will depend greatly on whether your
location actually receives a shower or thunderstorm. For instance,
25% of models show ZERO precipitation for the US-95 corridor and
Camas Prairie while 25% have up to 0.75 of an inch. Higher terrain
of the Clearwater Mountains have 0 to 1" of precipitation and
most of western MT south of I-90 has a 25% chance of ZERO and 25%
have up to 0.40 inches in the highest terrain. As always, higher
amounts will be possible from a single stronger storm or training
of storms.

Confidence in precipitation amounts is highest in northwest MT
and most of the precipitation will happen overnight Monday into
Tuesday. There is a 70-80% chance of receiving greater than 0.25
inch by Tuesday afternoon and higher terrain a 50-70% chance of
receiving a 0.50 inch or more.

A trend of warming and drying returns Wednesday. Still there
remains no signal in the models of a prolonged, strong summer high
pressure ridge. In fact, expect afternoon winds to increase by
Friday as yet another Pacific trough moves closer to the region.


&&

.AVIATION...A deepening trough over the Pacific Northwest and
increasing southwesterly flow will bring rising moisture and an
unsettled pattern to north-central Idaho and western Montana
through Tuesday. Isolated showers will be possible this afternoon
from north-central Idaho into west-central Montana. While most
terminals will remain VFR, brief reductions in visibility or
ceilings are possible in showers. Winds are forecast to be lighter
today in most places, and generally in the 15-25 kts range.

By Monday, a frontal boundary and upper jet will increase lift and
instability, leading to showers and isolated thunderstorms.


&&

.MSO WATCHES/WARNINGS/ADVISORIES...
MT...None.
ID...None.
&&

$$
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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