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Glasgow, Montana 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
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NWS Forecast for Glasgow MT
National Weather Service Forecast for:
Glasgow MT
Issued by: National Weather Service Glasgow, MT |
| Updated: 3:41 pm MDT May 24, 2026 |
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Tonight
Mostly Clear
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Memorial
Day
Sunny
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Monday
Night
Partly Cloudy
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Tuesday
Sunny then
Sunny and
Breezy
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Tuesday
Night
Breezy.
Slight Chance
T-storms then
Mostly Cloudy
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Wednesday
Mostly Sunny
and Breezy
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Wednesday
Night
Chance
Showers and
Breezy then
Mostly Cloudy
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Thursday
Mostly Sunny
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Thursday
Night
Slight Chance
T-storms then
Partly Cloudy
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| Lo 50 °F |
Hi 93 °F |
Lo 59 °F |
Hi 99 °F |
Lo 65 °F |
Hi 95 °F |
Lo 62 °F |
Hi 89 °F |
Lo 59 °F |
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Lake Wind Advisory
Tonight
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Mostly clear, with a low around 50. West wind around 5 mph becoming light and variable after midnight. |
Memorial Day
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Sunny, with a high near 93. Calm wind becoming southwest around 6 mph in the afternoon. |
Monday Night
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Partly cloudy, with a low around 59. East wind 6 to 11 mph, with gusts as high as 18 mph. |
Tuesday
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Sunny and hot, with a high near 99. Breezy, with a southeast wind 13 to 23 mph, with gusts as high as 33 mph. |
Tuesday Night
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A slight chance of showers and thunderstorms before 9pm, then a slight chance of showers between 9pm and midnight. Mostly cloudy, with a low around 65. Breezy, with an east wind 23 to 26 mph, with gusts as high as 38 mph. Chance of precipitation is 20%. |
Wednesday
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Mostly sunny, with a high near 95. Breezy, with an east wind 21 to 25 mph, with gusts as high as 37 mph. |
Wednesday Night
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A 30 percent chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 62. Breezy, with an east southeast wind 13 to 23 mph, with gusts as high as 32 mph. |
Thursday
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Mostly sunny, with a high near 89. Southeast wind 10 to 17 mph, with gusts as high as 25 mph. |
Thursday Night
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A 20 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 59. East wind 11 to 17 mph, with gusts as high as 24 mph. |
Friday
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Sunny, with a high near 92. East southeast wind 10 to 18 mph, with gusts as high as 28 mph. |
Friday Night
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Showers and thunderstorms likely. Mostly cloudy, with a low around 58. East southeast wind 11 to 20 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. |
Saturday
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Showers likely and possibly a thunderstorm. Partly sunny, with a high near 83. |
Saturday Night
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A chance of showers and thunderstorms. Mostly cloudy, with a low around 53. |
Sunday
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A chance of showers and thunderstorms. Mostly sunny, with a high near 80. |
Forecast from NOAA-NWS
for Glasgow MT.
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Weather Forecast Discussion
418
FXUS65 KGGW 241918
AFDGGW
Area Forecast Discussion
National Weather Service Glasgow MT
118 PM MDT Sun May 24 2026
.KEY MESSAGES...
- A warming trend will continue into Memorial Day. Highs could be
approaching 100 degrees in some locations on Tuesday.
- Hot temperatures, low humidity, and gusty southeast winds will
raise fire weather concerns for Tuesday.
- Scattered thunderstorms are expected by Tuesday evening moving
in from west to east, with an isolated stronger storm possible.
Expect chances for showers and thunderstorms to continue at
times for the second half of the week.
&&
.DISCUSSION...
WEATHER PATTERN OVERVIEW:
Temperatures will continue to heat up across NE Montana heading
into Memorial Day thanks to an upper ridge pattern. High
temperatures by Memorial Day will be well into the upper 80s to
mid 90s for most of NE Montana while relative humidity reaches as
low as 12 to 15 percent. However, wind is expected to be light
during this time, limiting the fire weather threat.
On Tuesday as the ridge will shift over to the east, low level
southeast winds will ramp up. High temperatures will be in the
90s to near 100 with humidity readings between 10 and 20 percent.
This combination in the presence of dry fuels will likely raise
fire weather concerns. Even where green up is underway, curing
may take place from consecutive hot and dry weather days. Gusty
southeast winds may also present boating hazards for Fort Peck
Lake. Future shifts can assess the need for any heat/lake/fire
weather related headlines as confidence continues to improve.
On Tuesday evening, an upper trough will move in from the west
while thunderstorms will across central Montana. These storms
will make progress eastward into NE Montana. An isolated stronger
thunderstorm is certainly possible, with the greatest coverage
expected to be for areas west of a line through OPheim to Glasgow
to Jordan.
Wednesday through Friday will continue to feature a deep trough
across the western CONUS and a ridge to the east. NE Montana will
be sandwiched in between with thunderstorm chances each day,
especially in afternoon and evening hours. Some of the storms have
the potential to be on the stronger side and may produce brief
heavy downpours.
FORECAST CONFIDENCE & DEVIATIONS:
NBM was largely used for the forecast period. Pops were however
adjusted in the near term for Tuesday for consistency and to best
reflect thunder chances. Confidence is certainly growing on hot,
dry, and windy conditions on Tuesday leading to heat, fire
weather, and lake wind concerns, as well as convective potential
later in the day. Confidence is more moderate for the thunderstorm
coverage later in the week given the later time scales involved,
but there is decent ensemble consensus in the overall synoptic
pattern.
&&
.AVIATION...
LAST UPDATED: Sunday May 24, 2026 at 1915Z.
FLIGHT CAT RANGE: VFR.
DISCUSSION: Excellent flying weather looks to continue with mid
to high clouds moving across the terminals at times.
WIND: West at 5 to 15 kts, with a few gusts to 20 kts through this
evening. Winds will become light and variable after 03Z.
EQUIPMENT: KSDY obs are unavailable and will be AMD NOT SKED.
&&
.GGW WATCHES/WARNINGS/ADVISORIES...
None.
&&
$$
weather.gov/glasgow
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