Observed 3:55 PM MDT at KSUN

Mackay, ID weather

Partly cloudy and 48°9°.

Forecasts differ

Now 48°9°

Partly sunny · Feels like 44°7°

Wind: 9 mph15 km/h; From the east-southeast. Up to 9 mph15 km/h through 4 AM
Dew point: 36°2°; Comfortable · down to 27°−3° by 10 PM (dry)
UV index: 2Low; Moderate until 5 PM · peak 4
Pressure: 30.22 inHg1023 hPa; Falling slowly · −0.04 inHg−1.3 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

4°2° warmer than this time yesterday (45°7° then, 48°9° now)

Good hours for

Below 40°4° tonight after 8 PM
Below freezing tonight 3–10 AM (low 29°−2°)
Low 29°−2° tomorrow at 7 AM
Above 40°4° tomorrow by 11 AM

This afternoonNear 47°8° · Clear
TonightDown to 30°−1° by 5 AM · freezing, low 30°−1° · Clear
Tomorrow morningUp to 43°6° by 11 AM · freezing, low 29°−2° · Clear
Tomorrow afternoonUp to 53°12° by 3 PM · Partly cloudy
Tomorrow nightDown to 34°1° by 4 AM · Mostly cloudy
Monday morningUp to 42°6° by 11 AM · Mostly cloudy
Monday afternoonUp to 50°10° by 3 PM · Mostly cloudy · rain chance 20%

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 4p	Sunny	47°8° (likely 44°7° to 48°9°)	46°8°	0%	3 mph5 km/h from SE, gusts 5 mph9 km/h	51%	7%	3
Sat 5p	Sunny	47°8° (likely 43°6° to 48°9°)	45°7°	0%	5 mph8 km/h from ESE, gusts 6 mph9 km/h	53%	8%	2
Sat 6p	Sunny	45°7° (likely 41°5° to 45°7°)	44°7°	0%	3 mph5 km/h from SE, gusts 8 mph13 km/h	64%	9%	1
Sat 7p	Clear	40°4° (likely 37°3° to 42°6°)	40°4°	0%	2 mph3 km/h from SE, gusts 8 mph13 km/h	68%	12%	0
Sat 8p	Clear	38°3° (likely 35°2° to 39°4°)	36°2°	0%	3 mph5 km/h from SSE, gusts 6 mph10 km/h	70%	9%	0
Sat 9p	Clear	37°3° (likely 34°1° to 37°3°)	34°1°	0%	3 mph5 km/h from SW, gusts 4 mph6 km/h	70%	0%	0
Sat 10p	Clear	36°2° (likely 32°0° to 37°3°)	36°2°	0%	2 mph3 km/h from NNW, gusts 3 mph5 km/h	70%	1%	0
Sat 11p	Clear	35°2° (likely 32°0° to 37°3°)	32°0°	0%	3 mph5 km/h from WNW, gusts 3 mph4 km/h	70%	6%	0
Sun 12a	Clear	34°1° (likely 32°0° to 37°3°)	34°1°	0%	2 mph3 km/h from N, gusts 4 mph6 km/h	70%	0%	0
Sun 1a	Clear	33°1° (likely 31°−1° to 36°2°)	33°1°	0%	2 mph3 km/h from NW, gusts 8 mph12 km/h	68%	0%	0
Sun 2a	Clear	33°1° (likely 31°−1° to 36°2°)	33°1°	0%	2 mph3 km/h from NW, gusts 7 mph11 km/h	67%	0%	0
Sun 3a	Clear	32°0° (likely 30°−1° to 36°2°)	32°0°	0%	2 mph3 km/h from NW, gusts 3 mph6 km/h	66%	0%	0
Sun 4a	Clear	31°−1° (likely 30°−1° to 37°3°)	31°−1°	0%	2 mph3 km/h from NW, gusts 3 mph5 km/h	65%	0%	0
Sun 5a	Clear	30°−1° (likely 30°−1° to 37°3°)	30°−1°	0%	2 mph3 km/h from NW, gusts 4 mph6 km/h	67%	0%	0
Sun 6a	Clear	30°−1° (likely 29°−2° to 36°2°)	26°−3°	0%	3 mph5 km/h from NW, gusts 4 mph6 km/h	69%	0%	0
Sun 7a	Clear	29°−2° (likely 29°−2° to 36°2°)	25°−4°	0%	3 mph5 km/h from NW, gusts 5 mph7 km/h	70%	0%	0
Sun 8a	Sunny	30°−1° (likely 29°−2° to 36°2°)	30°−1°	0%	2 mph3 km/h from NW, gusts 5 mph8 km/h	71%	0%	0
Sun 9a	Sunny	31°−1° (likely 30°−1° to 37°3°)	31°−1°	0%	2 mph3 km/h from NW, gusts 6 mph9 km/h	67%	0%	0
Sun 10a	Sunny	38°3° (likely 35°2° to 40°4°)	36°2°	0%	3 mph5 km/h from NW, gusts 4 mph7 km/h	62%	24%	1
Sun 11a	Sunny	43°6° (likely 40°4° to 44°7°)	41°5°	0%	3 mph5 km/h from ESE, gusts 7 mph11 km/h	59%	12%	2
Sun 12p	Sunny	48°9° (likely 43°6° to 48°9°)	46°8°	0%	5 mph8 km/h from ESE, gusts 9 mph14 km/h	56%	7%	3
Sun 1p	Sunny	51°11° (likely 45°7° to 51°11°)	51°11°	0%	5 mph8 km/h from ESE, gusts 11 mph17 km/h	53%	33%	4
Sun 2p	Mostly sunny	52°11° (likely 46°8° to 52°11°)	52°11°	0%	6 mph10 km/h from ESE, gusts 12 mph19 km/h	50%	45%	4
Sun 3p	Mostly sunny	53°12° (likely 47°8° to 53°12°)	53°12°	0%	7 mph11 km/h from ESE, gusts 13 mph21 km/h	49%	33%	4
Sun 4p	Mostly sunny	52°11° (likely 47°8° to 52°11°)	52°11°	0%	7 mph11 km/h from ESE, gusts 13 mph22 km/h	50%	47%	3
Sun 5p	Mostly sunny	51°11° (likely 45°7° to 51°11°)	51°11°	0%	7 mph11 km/h from ESE, gusts 14 mph22 km/h	52%	55%	2
Sun 6p	Cloudy	47°8° (likely 43°6° to 49°9°)	45°7°	0%	5 mph8 km/h from ESE, gusts 13 mph20 km/h	62%	66%	1
Sun 7p	Cloudy	42°6° (likely 40°4° to 45°7°)	39°4°	0%	5 mph8 km/h from ESE, gusts 11 mph17 km/h	69%	72%	0
Sun 8p	Cloudy	40°4° (likely 39°4° to 43°6°)	37°3°	0%	5 mph8 km/h from ESE, gusts 9 mph14 km/h	71%	77%	0
Sun 9p	Cloudy	39°4° (likely 37°3° to 41°5°)	36°2°	0%	5 mph8 km/h from ESE, gusts 8 mph13 km/h	73%	79%	0
Sun 10p	Cloudy	38°3° (likely 36°2° to 40°4°)	34°1°	0%	5 mph8 km/h from ESE, gusts 8 mph12 km/h	73%	77%	0
Sun 11p	Cloudy	37°3° (likely 35°2° to 40°4°)	33°1°	0%	5 mph8 km/h from ESE, gusts 7 mph12 km/h	74%	73%	0
Mon 12a	Mostly cloudy	37°3° (likely 34°1° to 39°4°)	33°1°	0%	5 mph8 km/h from ESE, gusts 7 mph11 km/h	74%	60%	0
Mon 1a	Partly cloudy	36°2° (likely 34°1° to 39°4°)	32°0°	0%	5 mph8 km/h from ESE, gusts 8 mph13 km/h	73%	61%	0
Mon 2a	Cloudy	36°2° (likely 33°1° to 38°3°)	32°0°	0%	5 mph8 km/h from ESE, gusts 8 mph14 km/h	73%	75%	0
Mon 3a	Cloudy	35°2° (likely 33°1° to 39°4°)	30°−1°	0%	6 mph10 km/h from ESE, gusts 9 mph14 km/h	75%	77%	0
Mon 4a	Mostly cloudy	34°1° (likely 33°1° to 38°3°)	29°−2°	0%	6 mph10 km/h from ESE, gusts 9 mph14 km/h	77%	64%	0
Mon 5a	Mostly cloudy	34°1° (likely 33°1° to 38°3°)	29°−2°	0%	6 mph10 km/h from ESE, gusts 8 mph13 km/h	81%	61%	0
Mon 6a	Cloudy	33°1° (likely 33°1° to 38°3°)	26°−3°	0%	8 mph13 km/h from ESE, gusts 8 mph12 km/h	84%	77%	0
Mon 7a	Cloudy	34°1° (likely 34°1° to 38°3°)	27°−3°	0%	8 mph13 km/h from ESE, gusts 8 mph13 km/h	85%	72%	0
Mon 8a	Partly sunny	34°1° (likely 34°1° to 38°3°)	27°−3°	0%	8 mph13 km/h from ESE, gusts 9 mph15 km/h	85%	66%	0
Mon 9a	Cloudy	34°1° (likely 34°1° to 39°4°)	27°−3°	0%	8 mph13 km/h from SE, gusts 10 mph16 km/h	84%	75%	0
Mon 10a	Partly sunny	38°3° (likely 38°3° to 42°6°)	32°0°	0%	8 mph13 km/h from SE, gusts 10 mph16 km/h	80%	77%	1
Mon 11a	Cloudy	42°6° (likely 42°6° to 45°7°)	37°3°	0%	8 mph13 km/h from SE, gusts 11 mph18 km/h	74%	79%	2
Mon 12p	Cloudy	46°8° (likely 44°7° to 47°8°)	41°5°	20%	12 mph19 km/h from SE, gusts 12 mph20 km/h	68%	76%	3
Mon 1p	Rain	48°9° (likely 44°7° to 50°10°)	43°6°	20%	12 mph19 km/h from SE, gusts 13 mph20 km/h	63%	61%	4
Mon 2p	Rain	49°9° (likely 45°7° to 50°10°)	44°7°	20%	12 mph19 km/h from SE, gusts 14 mph23 km/h	58%	67%	4
Mon 3p	Rain	50°10° (likely 45°7° to 51°11°)	45°7°	20%	13 mph21 km/h from SSE, gusts 15 mph23 km/h	56%	70%	4

Days ahead

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

Today, Oct 24. Sunny. High 47°8°, low 28°−2°. Typical 54°12° / 28°−2°. Dry. Forecasts differ.
1. Afternoon
  noon–6 PM
  Sunny, 47°8°
  Dry
2. Evening
  6 PM–midnight
  Clear, 38°3°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 30°−1°
  Dry
Official NWS forecast
Today: Sunny, with a high near 47. Southeast wind around 5 mph.
Tonight: Mostly clear. Low around 28, with temperatures rising to around 30 overnight. West wind around 3 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
44°7°–48°9°
Low, likely
27°−3°–32°0°
Typical high / low
54°12° / 28°−2°
Wind
15 mph25 km/h, gusts 25 mph41 km/h
UV peak
4
Tomorrow, Oct 25. Cloudy. High 53°12°, low 32°0°. Typical 53°12° / 27°−3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 30°−1°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 53°12°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 40°4°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 34°1°
  Dry
Official NWS forecast
Day: Sunny. High near 53, with temperatures falling to around 51 in the afternoon. East wind 2 to 7 mph.
Night: Mostly cloudy, with a low around 32. East southeast wind around 6 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
47°8°–53°12°
Low, likely
29°−2°–35°2°
Typical high / low
53°12° / 27°−3°
Wind
14 mph23 km/h
UV peak
4
Monday, Oct 26. Rain. High 50°10°, low 28°−2°. Typical 52°11° / 27°−3°. Rain 0.14 in3.6 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Rain, 50°10°
  40% chance · 0.3 in0.7 cm
3. Evening
  6 PM–midnight
  Drizzle, 41°5°
  50% chance · 0.2 in0.6 cm
4. Overnight
  midnight–6 AM
  Snow, 33°0°
  40% chance · 0.03 in0.8 mm
Official NWS forecast
Day: A slight chance of rain after noon. Partly sunny, with a high near 50. Southeast wind 8 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Night: Rain likely before 9pm, then rain and snow likely. Mostly cloudy, with a low around 28. Chance of precipitation is 60%. New snow accumulation of less than half an inch possible.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
44°7°–50°10°
Low, likely
28°−2°–36°2°
Typical high / low
52°11° / 27°−3°
Wind
14 mph22 km/h, gusts 29 mph47 km/h
UV peak
4
Tuesday, Oct 27. Snow. High 44°7°, low 24°−4°. Typical 52°11° / 27°−3°. Snow 0.03 in0.8 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 31°−1°
  20% chance
2. Afternoon
  noon–6 PM
  Partly sunny, 42°6°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 35°2°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 30°−1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow before noon. Mostly sunny, with a high near 44. Chance of precipitation is 40%. Little or no snow accumulation expected.
Night: Partly cloudy, with a low around 24.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
37°3°–44°7°
Low, likely
24°−4°–33°1°
Typical high / low
52°11° / 27°−3°
Wind
9 mph14 km/h, gusts 27 mph44 km/h
UV peak
4
Wednesday, Oct 28. Partly sunny. High 46°8°, low 28°−2°. Typical 51°11° / 26°−3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 28°−2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 44°7°
  Dry
3. Evening
  6 PM–midnight
  Clear, 35°2°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 33°0°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 46.
Night: Partly cloudy, with a low around 28.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
39°4°–46°8°
Low, likely
22°−6°–31°−1°
Typical high / low
51°11° / 26°−3°
Wind
9 mph15 km/h, gusts 20 mph32 km/h
UV peak
4
Thursday, Oct 29. Snow. High 47°8°, low 30°−1°. Typical 51°11° / 26°−3°. Snow 0–3 in0–8 cm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 45°7°
  Dry
3. Evening
  6 PM–midnight
  Fog, 40°4°
  30% chance · 0.3 in0.8 cm
4. Overnight
  midnight–6 AM
  Fog, 34°1°
  40% chance · 0.1 in0.3 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain and snow after noon. Partly sunny, with a high near 47. Chance of precipitation is 20%.
Night: Rain and snow likely. Mostly cloudy, with a low around 30. Chance of precipitation is 60%. New snow accumulation of less than half an inch possible.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
41°5°–48°9°
Low, likely
27°−3°–34°1°
Typical high / low
51°11° / 26°−3°
Wind
10 mph16 km/h, gusts 26 mph42 km/h
UV peak
3
Friday, Oct 30. Snow. High 46°8°, low 28°−2°. Typical 50°10° / 26°−3°. Snow 0–3 in0–8 cm, 50% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 33°0°
  40% chance · 0.1 in0.3 cm
2. Afternoon
  noon–6 PM
  Drizzle, 41°5°
  30% chance · 0.1 in0.3 cm
3. Evening
  6 PM–midnight
  Drizzle, 34°1°
  20% chance · 0.2 in0.4 cm
4. Overnight
  midnight–6 AM
  Partly cloudy, 28°−2°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain and snow. Partly sunny, with a high near 46. Chance of precipitation is 50%. New snow accumulation of less than half an inch possible.
Night: A chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 40%. New snow accumulation of less than half an inch possible.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
38°3°–46°8°
Low, likely
25°−4°–35°2°
Typical high / low
50°10° / 26°−3°
Wind
8 mph12 km/h, gusts 27 mph44 km/h
UV peak
1
Saturday, Oct 31. Cloudy. High 37°3°, low 26°−3°. Typical 50°10° / 25°−4°. Rain 0.08 in2 mm, 30% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 28°−2°
  20% chance
2. Afternoon
  noon–6 PM
  Sunny, 37°3°
  20% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Clear, 30°−1°
  20% chance · 0.2 in0.4 cm
4. Overnight
  midnight–6 AM
  Cloudy, 27°−3°
  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
34°1°–41°5°
Low, likely
20°−7°–33°1°
Typical high / low
50°10° / 25°−4°
Wind
8 mph13 km/h, gusts 14 mph22 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 41°5°, low 23°−5°. Typical 49°9° / 25°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 28°−2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 42°5°
  Dry
3. Evening
  6 PM–midnight
  Clear, 30°−1°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 24°−5°
  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
35°2°–49°9°
Low, likely
18°−8°–25°−4°
Typical high / low
49°9° / 25°−4°
Wind
10 mph16 km/h, gusts 16 mph26 km/h
UV peak
4
Monday, Nov 2. Snow. High 39°4°, low 23°−5°. Typical 49°9° / 24°−4°. Snow 0–1 in0–3 cm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 29°−2°
  Dry
2. Afternoon
  noon–6 PM
  Snow, 39°4°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 31°−1°
  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
34°1°–50°10°
Low, likely
18°−8°–29°−2°
Typical high / low
49°9° / 24°−4°
Wind
6 mph10 km/h, gusts 21 mph33 km/h
UV peak
2

10 days15 days30 days

The outlook

Today
Dry, high 47°, low 28°.
Tomorrow
Dry, high 53°, low 32°, warming up.
Monday
Dry, high 50°, low 28°, cooling off.
Rest of week
Highs 37–47°; chance of precipitation on Friday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (PIH) (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

Big Lost River below Mackay Reservoir

2.6 mi

Below flood stage

Level: 1.5 ft
Flow: 73 cfs

Forecast peak 1.5 ft Sat 6 PM

Reading from Sat 3:45 PM · NWS gauge page

Big Lost River at Howell Ranch

21 mi

Below flood stage

Level: 1.2 ft
Flow: 123 cfs

Forecast peak 1.1 ft Sat 6 PM

Reading from Sat 3 PM · NWS gauge page

Eastern Idaho Reservoirs at Mackay Dam

4.1 mi

Below flood stage

Level: 22.8 ft
Flow: 61,500 cfs

Reading from Sat 2:45 PM · NWS gauge page

Lower Cedar Creek above Divs Nr Mackay

4.2 mi

Level: 12.5 ft
Flow: 25 cfs

Reading from Sat 2:30 PM · NWS gauge page

For your home

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

Heating this week

About 72% less heating than a typical week.

This week 51Typical 180

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 38
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 6 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 36°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?

Mackay Lost River Rs · official normals 1991–2020 · records 1908–2026

Oct 24, today vs a typical year

Today’s expected high is 7°4° colder than typical.

Last 7 days vs normal

On average 9°5° warmer than normal (daily mean temperature).

+6°+3°SunOct 18
+6°+3°MonOct 19
+8°+4°TueOct 20
+10°+6°WedOct 21
+13°+7°ThuOct 22
+12°+6°FriOct 23
—SatOct 24

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

Sun & moon

Sun

Daylight: 10 h 35 min; Losing 2 min 49 s a day; shortest Dec 21, 1 h 42 min less
Golden hour: 5:55–6:54 PM; Morning 7:42–8:40 AM
Blue hour: 6:54–7:05 PM; Morning 7:31–7:42 AM; first light 7:31 AM

Stars tonight? Fair

Clear 7:05 PM–7:32 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 6:17 AM · rises 5:36 PM
Full moon: Oct 25
New moon: Nov 9

Looking north from Mackay. The highest point on the skyline is about 12,000 ft, 13 mi away.Skyline from USGS elevation data, heights drawn up to 2× taller. Sky, sun and moon as they are now.

Mackay, ID weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Big Lost River below Mackay Reservoir

Big Lost River at Howell Ranch

Eastern Idaho Reservoirs at Mackay Dam

Lower Cedar Creek above Divs Nr Mackay

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon