10-day forecast for Sidney, MT: 29° to 76°, with precipitation expected on 0 days. The table below breaks each day into morning, afternoon, evening and overnight.
76°
Best day: Wednesday, October 21
46°
Worst day: Thursday, October 15
Tap any day below to see morning, afternoon, evening and overnight.
Fri, 1657° / 29°0
Morning30°feels 24°
Afternoon54°feels 51°
Evening47°feels 42°
Overnight33°feels 29°
57 °
Sidney, Friday, 16 October
Clear. High 57°, low 29°.
Pressure30.59 inHg
Wind13.5 mph S
Humidity50%
Visibility6.2 mi
Dew point28°
Sat, 1773° / 41°0
Morning42°feels 36°
Afternoon71°feels 70°
Evening57°feels 55°
Overnight43°feels 38°
73 °
Sidney, Saturday, 17 October
Mostly clear. High 73°, low 41°.
Pressure29.94 inHg
Wind9.6 mph SW
Humidity37%
Visibility6.2 mi
Dew point38°
Sun, 1858° / 44°0
Morning47°feels 43°
Afternoon58°feels 55°
Evening46°feels 45°
Overnight55°feels 53°
58 °
Sidney, Sunday, 18 October
Overcast. High 58°, low 44°.
Pressure30.15 inHg
Wind4.4 mph N
Humidity40%
Visibility6.2 mi
Dew point32°
Mon, 1966° / 38°0
Morning42°feels 38°
Afternoon58°feels 56°
Evening57°feels 55°
Overnight40°feels 38°
66 °
Sidney, Monday, 19 October
Partly cloudy. High 66°, low 38°.
Pressure30.03 inHg
Wind11.1 mph SE
Humidity49%
Visibility—
Dew point37°
Tue, 2066° / 42°0
Morning47°feels 45°
Afternoon59°feels 58°
Evening57°feels 56°
Overnight51°feels 50°
66 °
Sidney, Tuesday, 20 October
Partly cloudy. High 66°, low 42°.
Pressure30.00 inHg
Wind8.6 mph SE
Humidity62%
Visibility—
Dew point44°
Wed, 2176° / 49°0
Morning55°feels 53°
Afternoon69°feels 67°
Evening68°feels 67°
Overnight62°feels 61°
76 °
Sidney, Wednesday, 21 October
Partly cloudy. High 76°, low 49°.
Pressure29.77 inHg
Wind13.9 mph SE
Humidity45%
Visibility—
Dew point44°
Thu, 2275° / 58°0
Morning62°feels 60°
Afternoon72°feels 70°
Evening65°feels 63°
Overnight60°feels 58°
75 °
Sidney, Thursday, 22 October
Overcast. High 75°, low 58°.
Pressure29.62 inHg
Wind14.9 mph SW
Humidity29%
Visibility—
Dew point37°
Fri, 2359° / 52°0
Morning53°feels 51°
Afternoon55°feels 53°
Evening53°feels 51°
Overnight52°feels 49°
59 °
Sidney, Friday, 23 October
Overcast. High 59°, low 52°.
Pressure29.88 inHg
Wind15.9 mph NW
Humidity57%
Visibility—
Dew point40°
Sat, 2448° / 40°0.01
Morning44°feels 37°
Afternoon44°feels 37°
Evening42°feels 38°
Overnight41°feels 38°
48 °
Sidney, Saturday, 24 October
Light rain. High 48°, low 40°.
Pressure30.21 inHg
Wind14.5 mph NW
Humidity67%
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 Sidney, 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.