10-day forecast for Saint Mary, MT: 46° to 83°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
83°
Best day: Sunday, August 16
52° · 0.15 in
Worst day: Thursday, August 13
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1076° / 46°0
Morning51°feels 49°
Afternoon74°feels 72°
Evening69°feels 67°
Overnight51°feels 48°
76 °
Saint Mary, Monday, 10 August
Clear. High 76°, low 46°.
Pressure29.88 inHg
Wind2.2 mph NW
Humidity28%
Visibility6.2 mi
Dew point36°
Tue, 1178° / 50°0
Morning58°feels 57°
Afternoon76°feels 75°
Evening70°feels 69°
Overnight50°feels 47°
78 °
Saint Mary, Tuesday, 11 August
Clear. High 78°, low 50°.
Pressure29.94 inHg
Wind1.3 mph NW
Humidity30%
Visibility6.2 mi
Dew point38°
Wed, 1257° / 49°0.04
Morning52°feels 52°
Afternoon56°feels 56°
Evening54°feels 53°
Overnight52°feels 51°
57 °
Saint Mary, Wednesday, 12 August
Light rain. High 57°, low 49°.
Pressure30.06 inHg
Wind6.6 mph NE
Humidity87%
Visibility6.2 mi
Dew point49°
Thu, 1352° / 49°0.15
Morning49°feels 46°
Afternoon50°feels 48°
Evening51°feels 50°
Overnight51°feels 50°
52 °
Saint Mary, Thursday, 13 August
Light rain. High 52°, low 49°.
Pressure30.06 inHg
Wind6.7 mph N
Humidity95%
Visibility—
Dew point48°
Fri, 1464° / 48°0
Morning49°feels 48°
Afternoon56°feels 55°
Evening62°feels 60°
Overnight53°feels 52°
64 °
Saint Mary, Friday, 14 August
Light rain. High 64°, low 48°.
Pressure30.06 inHg
Wind9.4 mph NE
Humidity77%
Visibility—
Dew point46°
Sat, 1577° / 47°0
Morning54°feels 53°
Afternoon74°feels 73°
Evening74°feels 73°
Overnight58°feels 56°
77 °
Saint Mary, Saturday, 15 August
Partly cloudy. High 77°, low 47°.
Pressure30.03 inHg
Wind5.5 mph SW
Humidity31%
Visibility—
Dew point37°
Sun, 1683° / 58°0.01
Morning65°feels 63°
Afternoon79°feels 79°
Evening75°feels 74°
Overnight64°feels 62°
83 °
Saint Mary, Sunday, 16 August
Light rain. High 83°, low 58°.
Pressure30.00 inHg
Wind10.9 mph W
Humidity27%
Visibility—
Dew point40°
Mon, 1780° / 60°0
Morning65°feels 63°
Afternoon76°feels 74°
Evening75°feels 73°
Overnight66°feels 64°
80 °
Saint Mary, Monday, 17 August
Overcast. High 80°, low 60°.
Pressure29.88 inHg
Wind24.5 mph W
Humidity24%
Visibility—
Dew point34°
Tue, 1876° / 53°0
Morning58°feels 56°
Afternoon73°feels 71°
Evening74°feels 73°
Overnight61°feels 59°
76 °
Saint Mary, Tuesday, 18 August
Overcast. High 76°, low 53°.
Pressure30.03 inHg
Wind13 mph W
Humidity26%
Visibility—
Dew point33°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Saint Mary, MT around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.