Observed 11:35 AM MDT at KSDY

Sidney, MT weather

Windy and 45°7°, freeze watch tonight, low 24°−4°.

Forecasts agree

Now 45°7°

Windy · Feels like 37°3°

Feels like: 37°3°; Wind chill from 20 mph32 km/h wind · air 45°7°
Wind: 20 mph32 km/h; From the west. Easing to 8 mph13 km/h by 5 PM
Dew point: 27°−3°; Dry, static shocks likely
UV tomorrow: 3Moderate; Moderate 12–4 PM · peak 3

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

16°9° cooler than this time yesterday (59°15° then, 43°6° now)

Good hours for

Gusts to 27 mph43 km/h until 1 PM
High 49°9° today at 4 PM
Below 40°4° tonight after 8 PM
Hard freeze tonight 10 PM–10 AM (low 23°−5°)
Hard freeze tomorrow night 11 PM–10 AM (low 27°−3°)

This afternoonUp to 49°9° by 4 PM · gusts to 27 mph43 km/h · Clear
TonightDown to 24°−4° by 5 AM · freezing, low 24°−4° · Clear
Tomorrow morningUp to 38°3° by 11 AM · freezing, low 23°−5° · Clear
Tomorrow afternoonUp to 49°9° by 4 PM · Clear
Tomorrow nightDown to 27°−3° by 5 AM · freezing, low 27°−3° · Partly cloudy
Monday morningUp to 36°2° by 10 AM · freezing, low 27°−3° · Mostly cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 11a	Sunny	40°4° (likely 40°4° to 43°6°)	32°0°	0%	15 mph24 km/h from W, gusts 27 mph44 km/h	56%	2%	1
Sat 12p	Sunny	43°6° (likely 43°6° to 46°8°)	36°2°	0%	15 mph24 km/h from W, gusts 26 mph41 km/h	49%	0%	1
Sat 1p	Sunny	46°8° (likely 46°8° to 48°9°)	40°4°	0%	14 mph23 km/h from W, gusts 23 mph37 km/h	43%	0%	2
Sat 2p	Sunny	47°8° (likely 47°8° to 49°9°)	41°5°	0%	14 mph23 km/h from W, gusts 23 mph36 km/h	39%	0%	2
Sat 3p	Sunny	48°9° (likely 48°9° to 50°10°)	42°6°	0%	13 mph21 km/h from W, gusts 20 mph32 km/h	35%	0%	2
Sat 4p	Sunny	49°9° (likely 49°9° to 50°10°)	44°7°	0%	12 mph19 km/h from W, gusts 18 mph29 km/h	35%	0%	1
Sat 5p	Sunny	47°8° (likely 46°8° to 49°9°)	43°6°	0%	8 mph13 km/h from W, gusts 15 mph24 km/h	36%	0%	1
Sat 6p	Clear	45°7° (likely 42°6° to 45°7°)	42°6°	0%	5 mph8 km/h from W, gusts 8 mph13 km/h	45%	0%	0
Sat 7p	Clear	40°4° (likely 39°4° to 42°6°)	38°3°	0%	3 mph5 km/h from W, gusts 5 mph7 km/h	55%	1%	0
Sat 8p	Clear	36°2° (likely 36°2° to 40°4°)	36°2°	0%	2 mph3 km/h from WSW, gusts 3 mph5 km/h	61%	0%	0
Sat 9p	Clear	34°1° (likely 34°1° to 38°3°)	34°1°	0%	2 mph3 km/h from SW, gusts 3 mph4 km/h	68%	0%	0
Sat 10p	Clear	32°0° (likely 32°0° to 37°3°)	32°0°	0%	1 mph2 km/h from WSW, gusts 2 mph3 km/h	73%	0%	0
Sat 11p	Clear	31°−1° (likely 31°−1° to 37°3°)	31°−1°	0%	1 mph2 km/h from WSW, gusts 3 mph4 km/h	77%	0%	0
Sun 12a	Clear	30°−1° (likely 30°−1° to 36°2°)	30°−1°	0%	1 mph2 km/h from W, gusts 3 mph4 km/h	80%	0%	0
Sun 1a	Clear	29°−2° (likely 29°−2° to 35°2°)	29°−2°	0%	1 mph2 km/h from WSW, gusts 2 mph3 km/h	79%	0%	0
Sun 2a	Clear	28°−2° (likely 28°−2° to 34°1°)	28°−2°	0%	1 mph2 km/h from NNE, gusts 2 mph3 km/h	81%	0%	0
Sun 3a	Clear	27°−3° (likely 27°−3° to 33°1°)	27°−3°	0%	1 mph2 km/h from NNE, gusts 3 mph5 km/h	83%	0%	0
Sun 4a	Clear	25°−4° (likely 25°−4° to 32°0°)	25°−4°	0%	1 mph2 km/h from NNE, gusts 6 mph9 km/h	87%	0%	0
Sun 5a	Clear	24°−4° (likely 24°−4° to 32°0°)	24°−4°	0%	2 mph3 km/h from NE, gusts 10 mph16 km/h	88%	0%	0
Sun 6a	Clear	24°−4° (likely 24°−4° to 31°−1°)	19°−7°	0%	3 mph5 km/h from NE, gusts 11 mph18 km/h	90%	0%	0
Sun 7a	Clear	23°−5° (likely 23°−5° to 31°−1°)	18°−8°	0%	3 mph5 km/h from NE, gusts 11 mph17 km/h	88%	0%	0
Sun 8a	Sunny	24°−4° (likely 24°−4° to 32°0°)	20°−7°	0%	3 mph5 km/h from NE, gusts 11 mph18 km/h	87%	1%	0
Sun 9a	Sunny	28°−2° (likely 28°−2° to 34°1°)	21°−6°	0%	7 mph11 km/h from ENE, gusts 15 mph23 km/h	82%	2%	1
Sun 10a	Sunny	34°1° (likely 34°1° to 38°3°)	28°−2°	0%	7 mph11 km/h from ENE, gusts 18 mph29 km/h	69%	2%	1
Sun 11a	Sunny	38°3° (likely 38°3° to 42°6°)	33°1°	0%	7 mph11 km/h from ENE, gusts 18 mph29 km/h	56%	0%	2
Sun 12p	Sunny	44°7° (likely 43°6° to 45°7°)	38°3°	0%	9 mph14 km/h from ENE, gusts 16 mph26 km/h	47%	0%	3
Sun 1p	Sunny	46°8° (likely 45°7° to 47°8°)	42°6°	0%	9 mph14 km/h from ENE, gusts 16 mph26 km/h	43%	0%	3
Sun 2p	Sunny	47°8° (likely 47°8° to 49°9°)	43°6°	0%	9 mph14 km/h from ENE, gusts 16 mph26 km/h	40%	0%	3
Sun 3p	Sunny	48°9° (likely 47°8° to 50°10°)	44°7°	0%	10 mph16 km/h from ENE, gusts 17 mph27 km/h	38%	0%	3
Sun 4p	Sunny	49°9° (likely 47°8° to 50°10°)	45°7°	0%	10 mph16 km/h from ENE, gusts 17 mph27 km/h	38%	0%	2
Sun 5p	Sunny	47°8° (likely 46°8° to 49°9°)	42°6°	0%	10 mph16 km/h from ENE, gusts 17 mph28 km/h	39%	0%	1
Sun 6p	Clear	44°7° (likely 42°6° to 44°7°)	40°4°	0%	8 mph13 km/h from ENE, gusts 13 mph21 km/h	48%	0%	0
Sun 7p	Clear	41°5° (likely 39°4° to 41°5°)	35°2°	0%	8 mph13 km/h from ENE, gusts 12 mph19 km/h	58%	4%	0
Sun 8p	Cloudy	36°2° (likely 36°2° to 40°4°)	30°−1°	0%	8 mph13 km/h from ENE, gusts 10 mph16 km/h	62%	41%	0
Sun 9p	Partly cloudy	36°2° (likely 34°1° to 38°3°)	30°−1°	0%	8 mph13 km/h from E, gusts 8 mph13 km/h	65%	46%	0
Sun 10p	Partly cloudy	34°1° (likely 33°1° to 37°3°)	27°−3°	0%	8 mph13 km/h from E, gusts 6 mph10 km/h	69%	44%	0
Sun 11p	Partly cloudy	32°0° (likely 32°0° to 37°3°)	25°−4°	0%	8 mph13 km/h from E, gusts 8 mph13 km/h	74%	34%	0
Mon 12a	Cloudy	31°−1° (likely 30°−1° to 36°2°)	24°−4°	5%	7 mph11 km/h from E, gusts 7 mph11 km/h	77%	64%	0
Mon 1a	Partly cloudy	30°−1° (likely 29°−2° to 35°2°)	23°−5°	5%	7 mph11 km/h from E, gusts 9 mph14 km/h	79%	58%	0
Mon 2a	Partly cloudy	29°−2° (likely 28°−2° to 35°2°)	22°−6°	5%	7 mph11 km/h from E, gusts 8 mph13 km/h	79%	75%	0
Mon 3a	Partly cloudy	29°−2° (likely 28°−2° to 34°1°)	23°−5°	5%	6 mph10 km/h from E, gusts 7 mph12 km/h	80%	76%	0
Mon 4a	Cloudy	28°−2° (likely 28°−2° to 35°2°)	22°−6°	5%	6 mph10 km/h from E, gusts 8 mph13 km/h	81%	87%	0
Mon 5a	Cloudy	27°−3° (likely 27°−3° to 36°2°)	20°−7°	5%	6 mph10 km/h from E, gusts 10 mph16 km/h	82%	87%	0
Mon 6a	Cloudy	27°−3° (likely 27°−3° to 36°2°)	20°−7°	5%	6 mph10 km/h from E, gusts 10 mph16 km/h	83%	83%	0
Mon 7a	Mostly cloudy	28°−2° (likely 28°−2° to 37°3°)	22°−6°	5%	6 mph10 km/h from E, gusts 12 mph19 km/h	84%	77%	0
Mon 8a	Mostly cloudy	30°−1° (likely 30°−1° to 38°3°)	24°−4°	5%	6 mph10 km/h from E, gusts 13 mph21 km/h	84%	81%	0
Mon 9a	Cloudy	32°0° (likely 32°0° to 40°4°)	25°−4°	5%	8 mph13 km/h from ESE, gusts 14 mph23 km/h	82%	93%	0
Mon 10a	Cloudy	36°2° (likely 36°2° to 41°5°)	30°−1°	5%	8 mph13 km/h from ESE, gusts 19 mph30 km/h	76%	90%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Cloudy. High 50°10°, low 22°−6°. Typical 54°12° / 30°−1°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Sunny, 49°9°
  Dry
2. Evening
  6 PM–midnight
  Clear, 36°2°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 24°−4°
  Dry
Official NWS forecast
Today: Sunny, with a high near 50. West wind 8 to 15 mph, with gusts as high as 26 mph.
Tonight: Mostly clear, with a low around 22. West wind 1 to 5 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
49°9°–50°10°
Low, likely
22°−6°–37°3°
Typical high / low
54°12° / 30°−1°
Wind
25 mph41 km/h, gusts 43 mph69 km/h
UV peak
3
Tomorrow, Oct 25. Mostly sunny. High 50°10°, low 25°−4°. Typical 54°12° / 30°−1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 24°−4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 49°9°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 36°2°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 27°−3°
  Dry
Official NWS forecast
Day: Sunny, with a high near 50. East northeast wind 3 to 10 mph, with gusts as high as 18 mph.
Night: Mostly cloudy, with a low around 25. East wind around 8 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
47°8°–50°10°
Low, likely
24°−4°–31°−1°
Typical high / low
54°12° / 30°−1°
Wind
13 mph21 km/h, gusts 23 mph36 km/h
UV peak
3
Monday, Oct 26. Mostly cloudy. High 46°8°, low 25°−4°. Typical 53°12° / 29°−2°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Cloudy, 30°−1°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 43°6°
  20% chance
3. Evening
  6 PM–midnight
  Cloudy, 38°3°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 34°1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 46. East southeast wind 6 to 14 mph, with gusts as high as 25 mph.
Night: Mostly cloudy, with a low around 25. East southeast wind 8 to 14 mph, with gusts as high as 25 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
42°6°–46°8°
Low, likely
25°−4°–34°1°
Typical high / low
53°12° / 29°−2°
Wind
15 mph24 km/h, gusts 27 mph43 km/h
Tuesday, Oct 27. Mostly cloudy. High 47°8°, low 28°−2°. Typical 52°11° / 29°−2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 39°4°
  30% chance · 0.03 in0.6 mm
3. Evening
  6 PM–midnight
  Drizzle, 38°3°
  40% chance · 0.02 in0.6 mm
4. Overnight
  midnight–6 AM
  Drizzle, 35°1°
  30% chance · 0.02 in0.4 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly cloudy, with a high near 47. Southeast wind 8 to 12 mph, with gusts as high as 22 mph.
Night: A chance of rain. Mostly cloudy, with a low around 28. South southeast wind 5 to 8 mph. Chance of precipitation is 30%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
37°3°–47°8°
Low, likely
28°−2°–35°2°
Typical high / low
52°11° / 29°−2°
Wind
14 mph22 km/h, gusts 23 mph37 km/h
UV peak
1
Wednesday, Oct 28. Rain. High 50°10°, low 23°−5°. Typical 52°11° / 28°−2°. Rain 0.02 in0.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 39°4°
  20% chance
2. Afternoon
  noon–6 PM
  Sunny, 53°12°
  Dry
3. Evening
  6 PM–midnight
  Clear, 40°5°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 31°0°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Partly sunny, with a high near 50. West northwest wind 6 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 30%.
Night: Partly cloudy, with a low around 23. West northwest wind 2 to 7 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
50°10°–57°14°
Low, likely
23°−5°–36°2°
Typical high / low
52°11° / 28°−2°
Wind
16 mph26 km/h, gusts 33 mph53 km/h
Thursday, Oct 29. Mostly cloudy. High 48°9°, low 25°−4°. Typical 51°11° / 28°−2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 33°1°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 49°9°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 40°5°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 36°2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 48. North northeast wind 3 to 8 mph.
Night: Partly cloudy, with a low around 25.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
43°6°–55°13°
Low, likely
25°−4°–34°1°
Typical high / low
51°11° / 28°−2°
Wind
15 mph24 km/h, gusts 34 mph55 km/h
UV peak
3
Friday, Oct 30. Mostly cloudy. High 49°9°, low 27°−3°. Typical 51°11° / 28°−2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 44°7°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 42°5°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 40°4°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 49.
Night: A slight chance of rain after midnight. Mostly cloudy, with a low around 27.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
37°3°–51°11°
Low, likely
27°−3°–42°6°
Typical high / low
51°11° / 28°−2°
Wind
15 mph23 km/h, gusts 39 mph63 km/h
UV peak
3
Saturday, Oct 31. Drizzle. High 43°6°, low 37°3°. Typical 50°10° / 27°−3°. Rain 0.11 in2.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 40°4°
  20% chance · 0.08 in2 mm
2. Afternoon
  noon–6 PM
  Drizzle, 42°5°
  20% chance · 0.09 in2.3 mm
3. Evening
  6 PM–midnight
  Clear, 40°4°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 36°2°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
39°4°–50°10°
Low, likely
33°1°–43°6°
Typical high / low
50°10° / 27°−3°
Wind
17 mph27 km/h, gusts 23 mph37 km/h
UV peak
2
Sunday, Nov 1. Mostly sunny. High 45°7°, low 34°1°. Typical 50°10° / 27°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 45°7°
  Dry
3. Evening
  6 PM–midnight
  Clear, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 35°2°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
42°6°–47°8°
Low, likely
26°−3°–43°6°
Typical high / low
50°10° / 27°−3°
Wind
15 mph25 km/h, gusts 24 mph38 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 50°10°, low 35°2°. Typical 49°9° / 26°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 38°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 48°9°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 43°6°
  Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
48°9°–53°12°
Low, likely
32°0°–40°4°
Typical high / low
49°9° / 26°−3°
Wind
13 mph21 km/h, gusts 21 mph34 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 50°, low 22°.
Tomorrow
Dry, high 50°, low 25°.
Monday
Dry, high 46°, low 25°, cooling off.
Rest of week
Mostly dry, highs 43–50°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (GGW) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Yellowstone River near Sidney

2.7 mi

Below flood stage

Level: 2.5 ft
Flow: 5,420 cfs

Reading from Sat 10 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Pipes: watch the cold

Tonight’s low: 24°−4°

Overnight low near 24°F — not yet at drip-the-faucets cold, but worth watching if it's forecast to drop further.

Heating this week

About 66% less heating than a typical week.

This week 58Typical 171

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 43
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 8 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 27°F).

Open the windows?

No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.

Is this typical?

Sidney · official normals 1991–2020 · records 1910–2026

Oct 24, today vs a typical year

Today’s expected high is 4°2° colder than typical.

Last 7 days vs normal

On average 6°4° warmer than normal (daily mean temperature).

+8°+4°SunOct 18
+4°+2°MonOct 19
+8°+4°TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24

Sidney weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 23 min; Losing 3 min 17 s a day; shortest Dec 21, 1 h 58 min less
Golden hour: 5:08–6:11 PM; Morning 7:09–8:12 AM
Blue hour: 6:11–6:23 PM; Morning 6:57–7:09 AM; first light 6:57 AM

Stars tonight? Fair

Clear 6:23 PM–6:58 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:41 AM · rises 4:52 PM
Full moon: Oct 25
New moon: Nov 9

Looking northwest from Sidney. The highest point on the skyline is about 2,600 ft, 10 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.