JEFFERSON CTY, MT 59638 Weather Forecast & Current Conditions
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  59638 WEATHER WARNINGS (SEVERE T-STORM & TORNADO)
 CURRENT WEATHER

HELENA, MT
Current Weather
11:53 PM MDT JUN 8, 2026
Few Clouds
57°F
Feels Like: 57°F
Dewpoint: 37°F
Rel. Hum.: 47%
Visibility: 10 miles
Wind: Calm
Pressure: 29.69 inches
Last 72 hours

Local Area Snow Depth

Montana Current Weather

Montana MOS Forecast Weather


Weather Map

(Automated weather data from NWS/FAA)
  59638 WEATHER FORECAST
10-Day model forecast maps
2025 Hurricanes

JEFFERSON CTY, MT 59638
Weather Forecast

 Snowfall Forecast pages
Snow Depth pages
REST OF TODAY
Mostly cloudy. Haze and areas of smoke through the day. Chance of rain showers and slight chance of thunderstorms in the afternoon. Highs 65 to 75. West winds 5 to 15 mph. Chance of precipitation 50 percent.
TONIGHT
Cooler, cloudy. Rain showers likely and slight chance of thunderstorms in the evening, then chance of rain showers and slight chance of thunderstorms after midnight. Areas of smoke in the evening. Haze through the night. Lows 45 to 55. West winds 5 to 10 mph shifting to the southwest after midnight. Chance of precipitation 70 percent.
WEDNESDAY
Mostly cloudy. Chance of rain showers in the morning, then chance of rain showers and slight chance of thunderstorms in the afternoon. Areas of smoke in the morning. Haze through the day. Highs 65 to 75. Northwest winds up to 10 mph. Chance of precipitation 50 percent.
WEDNESDAY NIGHT
Haze in the evening. Partly cloudy with a 20 percent chance of thunderstorms in the evening, then mostly cloudy after midnight. Lows 45 to 50. North winds up to 10 mph shifting to the northwest after midnight.
THURSDAY
Mostly cloudy. Slight chance of rain showers in the morning, then chance of thunderstorms in the afternoon. Highs 60 to 70. West winds up to 5 mph shifting to the south in the afternoon. Chance of precipitation 50 percent.
THURSDAY NIGHT
Mostly cloudy with a 50 percent chance of thunderstorms. Lows 40 to 50.
FRIDAY
Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 60 to 70. Chance of precipitation 50 percent.
FRIDAY NIGHT
Mostly cloudy with a 20 percent chance of rain showers. Lows 40 to 45.
SATURDAY THROUGH SUNDAY
Mostly cloudy with chance of rain showers and slight chance of thunderstorms. Highs 55 to 65. Lows 40 to 45. Chance of precipitation 50 percent.
SUNDAY NIGHT
Mostly cloudy with a 40 percent chance of rain showers. Lows 35 to 45.
MONDAY
Mostly cloudy with a 50 percent chance of rain showers. Highs 55 to 65.

  59638 WEATHER SATELLITE LOOPS
Visible Weather Satellite
JEFFERSON CTY, MT 59638
Infrared Weather Satellite
JEFFERSON CTY, MT 59638
  59638 WEATHER RADAR LOOP
NEXRAD Weather Radar
JEFFERSON CTY, MT 59638
 MOS COMPUTER WEATHER FORECAST

HELENA, MT 3 hourly weather forecast
weather forecast created  8:00 PM EDT  6/ 8/2026
Tuesday
9 JUN 2026		 JEFFERSON CTY, MT 59638 weather forecast Day 1, 0 hours 12 AM 58° 58° Mostly Cloudy 8%

 0% Thunder
( 0% severe)		 W   5 45% 37°
Low 51° JEFFERSON CTY, MT 59638 weather forecast Day 1, 3 hours 3 AM 55° 54° Mostly Cloudy SW   6 51% 37°
High 67° JEFFERSON CTY, MT 59638 weather forecast Day 1, 6 hours 6 AM 52° 50° Mostly Cloudy 10%
RAIN
<.01 in		 0% Thunder
( 9% severe)		 SSW   7 61% 39°

Mostly Cloudy

Rain Likely

 JEFFERSON CTY, MT 59638 weather forecast Day 1, 9 hours 9 AM 57° 55° Mostly Cloudy W   9 55% 41°
JEFFERSON CTY, MT 59638 weather forecast Day 1, 12 hours 12 PM 62° 60° Mostly Cloudy 65%
RAIN
.01–.1 in		 0% Thunder
( 36% severe)		 W   15 46% 41°
JEFFERSON CTY, MT 59638 weather forecast Day 1, 15 hours 3 PM 63° 61° Mostly Cloudy W   18 44% 41°
JEFFERSON CTY, MT 59638 weather forecast Day 1, 18 hours 6 PM 62° 59° Mostly Cloudy 5%

 0% Thunder
( 11% severe)		 W   21 38% 36°
JEFFERSON CTY, MT 59638 weather forecast Day 1, 21 hours 9 PM 56° 52° Partly Cloudy W   18 43% 34°
Wednesday
10 JUN 2026		 JEFFERSON CTY, MT 59638 weather forecast Day 2, 0 hours 12 AM 50° 45° Partly Cloudy 2%

 0% Thunder
( 1% severe)		 WSW   13 56% 35°
Low 43° JEFFERSON CTY, MT 59638 weather forecast Day 2, 3 hours 3 AM 47° 41° Partly Cloudy WSW   13 60% 34°
High 58° JEFFERSON CTY, MT 59638 weather forecast Day 2, 6 hours 6 AM 44° 38° Partly Cloudy 1%

 0% Thunder
( 3% severe)		 WSW   13 65% 33°

Partly Cloudy




Windy		 JEFFERSON CTY, MT 59638 weather forecast Day 2, 9 hours 9 AM 49° 42° Partly Cloudy W   22 52% 32°
JEFFERSON CTY, MT 59638 weather forecast Day 2, 12 hours 12 PM 53° 47° Partly Cloudy 13%
RAIN
<.01 in		 0% Thunder
( 15% severe)		 W   26 43% 31°
JEFFERSON CTY, MT 59638 weather forecast Day 2, 15 hours 3 PM 55° 49° Partly Cloudy W   26 41% 32°
JEFFERSON CTY, MT 59638 weather forecast Day 2, 18 hours 6 PM 54° 48° Mostly Cloudy 11%
RAIN
<.01 in		 0% Thunder
( 8% severe)		 W   25 43% 32°
JEFFERSON CTY, MT 59638 weather forecast Day 2, 21 hours 9 PM 51° 44° Mostly Cloudy W   24 48% 32°

HELENA, MT extended weather forecast
Thursday
11 JUN 2026		 Friday
12 JUN 2026		 Saturday
13 JUN 2026		 Sunday
14 JUN 2026		 Monday
15 JUN 2026
Low 44° Low 47° Low 48° Low 46° Low 49°
High 69° High 76° High 64° High 70° High 75°
JEFFERSON CTY, MT 59638 weather forecast Day 3 JEFFERSON CTY, MT 59638 weather forecast Day 4 JEFFERSON CTY, MT 59638 weather forecast Day 5 JEFFERSON CTY, MT 59638 weather forecast Day 6 JEFFERSON CTY, MT 59638 weather forecast Day 7
Mostly Cloudy
56% Rain		 Partly Cloudy
6% Rain		 Overcast
46% Rain		 Partly Cloudy
27% Rain		 Mostly Cloudy
36% Rain
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