Observed 6:15 PM MDT at KDIJ

Irwin, ID weather

Overcast and 45°7°.

Mostly agree

Now 45°7°

Cloudy

Wind: 5 mph7 km/h; From the north. Up to 8 mph13 km/h through 6 AM
Dew point: 37°3°; Comfortable
UV tomorrow: 4Moderate; Moderate 11 AM–5 PM · peak 4
Pressure: 30.23 inHg1024 hPa; Rising slowly · +0.02 inHg+0.7 hPa in 3 h

Light snow now, through the next 2 hours.

From forecast models

Next 48 hours

5°3° warmer than this time yesterday (40°4° then, 45°7° now)

Good hours for

Below 40°4° tonight after 9 PM
Below freezing tomorrow 4–9 AM (low 31°−1°)
Low 31°−1° tomorrow at 7 AM
Above 40°4° tomorrow by 11 AM
High 56°13° tomorrow at 3 PM

TonightDown to 32°0° by 4 AM · freezing, low 32°0° · Clear
Tomorrow morningUp to 43°6° by 11 AM · freezing, low 31°−1° · Clear
Tomorrow afternoonUp to 56°13° by 3 PM · Clear
Tomorrow nightDown to 36°2° by 3 AM · Partly cloudy
Monday morningUp to 45°7° by 11 AM · Mostly cloudy
Monday afternoonUp to 56°13° by 3 PM · Partly 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 6p	Clear	48°9° (likely 45°7° to 50°10°)	48°9°	0%	2 mph3 km/h from NNW, gusts 6 mph10 km/h	72%	17%	1
Sat 7p	Clear	45°7° (likely 41°5° to 45°7°)	45°7°	0%	2 mph3 km/h from N, gusts 8 mph13 km/h	82%	8%	0
Sat 8p	Clear	41°5° (likely 37°3° to 44°7°)	41°5°	0%	2 mph3 km/h from N, gusts 3 mph5 km/h	87%	3%	0
Sat 9p	Clear	39°4° (likely 34°1° to 41°5°)	36°2°	0%	5 mph8 km/h from SSE, gusts 4 mph6 km/h	89%	1%	0
Sat 10p	Clear	38°3° (likely 32°0° to 40°4°)	34°1°	0%	5 mph8 km/h from SE, gusts 3 mph5 km/h	91%	0%	0
Sat 11p	Clear	36°2° (likely 31°−1° to 38°3°)	32°0°	0%	5 mph8 km/h from ESE, gusts 3 mph5 km/h	96%	0%	0
Sun 12a	Clear	35°2° (likely 30°−1° to 38°3°)	30°−1°	0%	6 mph10 km/h from SE, gusts 4 mph6 km/h	96%	3%	0
Sun 1a	Clear	35°2° (likely 30°−1° to 37°3°)	30°−1°	0%	6 mph10 km/h from ESE, gusts 3 mph5 km/h	99%	18%	0
Sun 2a	Mostly clear	34°1° (likely 30°−1° to 38°3°)	29°−2°	0%	6 mph10 km/h from ESE, gusts 2 mph4 km/h	100%	42%	0
Sun 3a	Mostly clear	34°1° (likely 29°−2° to 38°3°)	28°−2°	0%	7 mph11 km/h from ESE, gusts 4 mph6 km/h	100%	18%	0
Sun 4a	Clear	32°0° (likely 29°−2° to 38°3°)	25°−4°	0%	8 mph13 km/h from ESE, gusts 3 mph5 km/h	100%	4%	0
Sun 5a	Clear	32°0° (likely 29°−2° to 38°3°)	25°−4°	0%	8 mph13 km/h from ESE, gusts 4 mph6 km/h	99%	0%	0
Sun 6a	Clear	32°0° (likely 29°−2° to 37°3°)	25°−4°	0%	8 mph13 km/h from ESE, gusts 3 mph5 km/h	99%	0%	0
Sun 7a	Clear	31°−1° (likely 29°−2° to 37°3°)	23°−5°	0%	9 mph14 km/h from ESE, gusts 3 mph5 km/h	99%	0%	0
Sun 8a	Sunny	32°0° (likely 30°−1° to 37°3°)	24°−4°	0%	9 mph14 km/h from SE, gusts 3 mph5 km/h	100%	0%	0
Sun 9a	Sunny	33°1° (likely 33°1° to 38°3°)	24°−4°	0%	13 mph21 km/h from SE, gusts 3 mph5 km/h	100%	0%	0
Sun 10a	Sunny	38°3° (likely 38°3° to 43°6°)	32°0°	0%	8 mph13 km/h from SE, gusts 4 mph7 km/h	90%	0%	1
Sun 11a	Sunny	43°6° (likely 43°6° to 50°10°)	40°4°	0%	5 mph8 km/h from SE, gusts 7 mph11 km/h	81%	0%	3
Sun 12p	Sunny	48°9° (likely 48°9° to 54°12°)	48°9°	0%	2 mph3 km/h from SE, gusts 6 mph10 km/h	66%	1%	4
Sun 1p	Sunny	53°12° (likely 51°11° to 56°13°)	53°12°	0%	1 mph2 km/h from SE, gusts 6 mph9 km/h	59%	1%	4
Sun 2p	Sunny	54°12° (likely 53°12° to 58°14°)	54°12°	0%	1 mph2 km/h from SE, gusts 6 mph9 km/h	55%	1%	4
Sun 3p	Sunny	56°13° (likely 54°12° to 58°14°)	56°13°	0%	2 mph3 km/h from W, gusts 6 mph9 km/h	51%	5%	4
Sun 4p	Sunny	56°13° (likely 54°12° to 58°14°)	56°13°	0%	1 mph2 km/h from NW, gusts 5 mph8 km/h	51%	17%	3
Sun 5p	Sunny	54°12° (likely 52°11° to 57°14°)	54°12°	0%	1 mph2 km/h from NNW, gusts 5 mph8 km/h	57%	5%	2
Sun 6p	Clear	51°11° (likely 48°9° to 53°12°)	51°11°	0%	2 mph3 km/h from WSW, gusts 9 mph14 km/h	68%	9%	1
Sun 7p	Clear	47°8° (likely 44°7° to 49°9°)	47°8°	0%	2 mph3 km/h from WSW, gusts 6 mph10 km/h	78%	13%	0
Sun 8p	Clear	43°6° (likely 40°4° to 48°9°)	43°6°	0%	2 mph3 km/h from WSW, gusts 4 mph7 km/h	83%	8%	0
Sun 9p	Partly cloudy	42°6° (likely 38°3° to 46°8°)	38°3°	0%	6 mph10 km/h from ESE, gusts 4 mph7 km/h	87%	44%	0
Sun 10p	Partly cloudy	40°4° (likely 36°2° to 45°7°)	36°2°	0%	6 mph10 km/h from ESE, gusts 3 mph5 km/h	91%	48%	0
Sun 11p	Partly cloudy	39°4° (likely 35°2° to 44°7°)	35°2°	0%	6 mph10 km/h from ESE, gusts 3 mph6 km/h	97%	50%	0
Mon 12a	Partly cloudy	38°3° (likely 35°2° to 43°6°)	32°0°	0%	8 mph13 km/h from SE, gusts 3 mph5 km/h	98%	58%	0
Mon 1a	Partly cloudy	38°3° (likely 35°2° to 42°6°)	32°0°	0%	8 mph13 km/h from SE, gusts 4 mph7 km/h	100%	63%	0
Mon 2a	Partly cloudy	38°3° (likely 36°2° to 42°6°)	32°0°	0%	8 mph13 km/h from SE, gusts 5 mph8 km/h	100%	59%	0
Mon 3a	Partly cloudy	36°2° (likely 36°2° to 42°6°)	29°−2°	0%	10 mph16 km/h from SE, gusts 5 mph8 km/h	100%	34%	0
Mon 4a	Partly cloudy	36°2° (likely 35°2° to 42°6°)	29°−2°	0%	10 mph16 km/h from SE, gusts 6 mph9 km/h	100%	54%	0
Mon 5a	Cloudy	36°2° (likely 34°1° to 41°5°)	29°−2°	0%	10 mph16 km/h from SE, gusts 7 mph10 km/h	100%	65%	0
Mon 6a	Partly cloudy	35°2° (likely 34°1° to 41°5°)	26°−3°	0%	14 mph23 km/h from SE, gusts 11 mph17 km/h	100%	58%	0
Mon 7a	Partly cloudy	36°2° (likely 36°2° to 42°6°)	27°−3°	0%	14 mph23 km/h from SE, gusts 13 mph20 km/h	100%	58%	0
Mon 8a	Partly sunny	36°2° (likely 36°2° to 42°6°)	27°−3°	0%	14 mph23 km/h from SE, gusts 11 mph17 km/h	100%	66%	0
Mon 9a	Partly sunny	36°2° (likely 36°2° to 44°7°)	25°−4°	0%	20 mph32 km/h from SE, gusts 13 mph22 km/h	100%	70%	0
Mon 10a	Partly sunny	40°4° (likely 40°4° to 48°9°)	31°−1°	0%	20 mph32 km/h from SE, gusts 15 mph24 km/h	94%	73%	1
Mon 11a	Partly sunny	45°7° (likely 45°7° to 52°11°)	37°3°	0%	20 mph32 km/h from SE, gusts 16 mph26 km/h	84%	66%	2
Mon 12p	Partly sunny	49°9° (likely 49°9° to 54°12°)	44°7°	0%	14 mph23 km/h from S, gusts 16 mph26 km/h	74%	35%	3
Mon 1p	Partly sunny	53°12° (likely 53°12° to 57°14°)	53°12°	0%	14 mph23 km/h from S, gusts 16 mph25 km/h	65%	52%	4
Mon 2p	Partly sunny	55°13° (likely 55°13° to 58°14°)	55°13°	0%	14 mph23 km/h from S, gusts 16 mph26 km/h	57%	33%	4
Mon 3p	Partly sunny	56°13° (likely 56°13° to 59°15°)	56°13°	0%	8 mph13 km/h from S, gusts 17 mph27 km/h	53%	32%	4
Mon 4p	Partly sunny	55°13° (likely 55°13° to 58°14°)	55°13°	0%	8 mph13 km/h from S, gusts 17 mph28 km/h	53%	43%	3
Mon 5p	Partly sunny	53°12° (likely 53°12° to 56°13°)	53°12°	0%	8 mph13 km/h from S, gusts 17 mph27 km/h	56%	67%	2

Days ahead

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

Today, Oct 24. Drizzle. High 52°11°, low 30°−1°. Typical 55°13° / 26°−3°. Rain 0.07 in1.8 mm, 80% chance. Mostly agree.
1. Evening
  6 PM–midnight
  Clear, 41°5°
  Dry
2. Overnight
  midnight–6 AM
  Mostly clear, 32°0°
  Dry
Official NWS forecast
Tonight: Mostly clear. Low around 30, with temperatures rising to around 32 overnight. East southeast wind 2 to 8 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
50°10°–54°12°
Low, likely
30°−1°–36°2°
Typical high / low
55°13° / 26°−3°
Wind
5 mph9 km/h, gusts 11 mph18 km/h
UV peak
4
Tomorrow, Oct 25. Mostly sunny. High 56°13°, low 34°1°. Typical 54°12° / 26°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 32°0°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 56°13°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 43°6°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 36°2°
  Dry
Official NWS forecast
Day: Sunny. High near 56, with temperatures falling to around 54 in the afternoon. East southeast wind 1 to 13 mph, with gusts as high as 20 mph.
Night: Partly cloudy. Low around 34, with temperatures rising to around 36 overnight. South southeast wind 2 to 10 mph, with gusts as high as 20 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
54°12°–58°14°
Low, likely
28°−2°–37°3°
Typical high / low
54°12° / 26°−3°
Wind
7 mph12 km/h, gusts 13 mph21 km/h
UV peak
4
Monday, Oct 26. Partly sunny. High 56°13°, low 32°0°. Typical 54°12° / 26°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 56°13°
  Dry
3. Evening
  6 PM–midnight
  Drizzle, 45°7°
  60% chance · 0.2 in0.4 cm
4. Overnight
  midnight–6 AM
  Rain, 36°2°
  70% chance · 0.2 in0.5 cm
Official NWS forecast
Day: Mostly sunny, with a high near 56. South southeast wind 8 to 20 mph, with gusts as high as 31 mph.
Night: A chance of rain before midnight, then rain and snow between midnight and 3am, then rain and snow. Mostly cloudy, with a low around 32. South wind 6 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
53°12°–58°14°
Low, likely
32°0°–39°4°
Typical high / low
54°12° / 26°−3°
Wind
11 mph17 km/h, gusts 27 mph43 km/h
UV peak
4
Tuesday, Oct 27. Snow. High 44°7°, low 28°−2°. Typical 53°12° / 25°−4°. Snow 0–2 in0–5 cm, 60% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Snow, 35°2°
  60% chance · 0.1 in0.3 cm
2. Afternoon
  noon–6 PM
  Drizzle, 43°6°
  50% chance · 0.01 in0.3 mm
3. Evening
  6 PM–midnight
  Cloudy, 38°3°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 35°2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Rain and snow likely. Mostly cloudy, with a high near 44. Chance of precipitation is 60%. Little or no snow accumulation expected.
Night: Mostly cloudy, with a low around 28.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
40°4°–45°7°
Low, likely
28°−2°–35°2°
Typical high / low
53°12° / 25°−4°
Wind
12 mph19 km/h, gusts 28 mph44 km/h
UV peak
3
Wednesday, Oct 28. Cloudy. High 51°11°, low 33°1°. Typical 53°12° / 25°−4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 50°10°
  Dry
3. Evening
  6 PM–midnight
  Clear, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 38°3°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 51.
Night: A slight chance of rain after midnight. Partly cloudy, with a low around 33. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
46°8°–52°11°
Low, likely
27°−3°–34°1°
Typical high / low
53°12° / 25°−4°
Wind
8 mph13 km/h, gusts 20 mph32 km/h
UV peak
4
Thursday, Oct 29. Rain. High 52°11°, low 35°2°. Typical 52°11° / 25°−4°. Rain 0.06 in1.5 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 40°5°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 52°11°
  30% chance · 0.02 in0.5 mm
3. Evening
  6 PM–midnight
  Cloudy, 44°6°
  40% chance
4. Overnight
  midnight–6 AM
  Drizzle, 40°5°
  40% chance · 0.04 in1 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Partly sunny, with a high near 52. Chance of precipitation is 30%.
Night: A chance of rain. Mostly cloudy, with a low around 35. Chance of precipitation is 30%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
48°9°–54°12°
Low, likely
33°1°–40°4°
Typical high / low
52°11° / 25°−4°
Wind
11 mph17 km/h, gusts 30 mph48 km/h
UV peak
4
Friday, Oct 30. Snow. High 50°10°, low 33°1°. Typical 52°11° / 25°−4°. Snow 0–2 in0–5 cm, 60% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 41°5°
  50% chance · 0.08 in2.1 mm
2. Afternoon
  noon–6 PM
  Drizzle, 48°9°
  50% chance · 0.09 in2.2 mm
3. Evening
  6 PM–midnight
  Drizzle, 42°6°
  50% chance · 0.2 in0.5 cm
4. Overnight
  midnight–6 AM
  Rain, 39°4°
  40% chance · 0.07 in1.8 mm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain before 9am, then rain and snow likely. Mostly cloudy, with a high near 50. Chance of precipitation is 60%.
Night: Rain likely before midnight, then a chance of rain and snow. Mostly cloudy, with a low around 33. Chance of precipitation is 60%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
44°7°–52°11°
Low, likely
33°1°–41°5°
Typical high / low
52°11° / 25°−4°
Wind
7 mph11 km/h, gusts 25 mph40 km/h
UV peak
2
Saturday, Oct 31. Snow. High 48°9°, low 32°0°. Typical 51°11° / 24°−4°. Snow 0.23 in5.8 mm, 40% chance. Mostly agree.
1. Morning
  6 AM–noon
  Rain, 37°3°
  40% chance · 0.08 in2.1 mm
2. Afternoon
  noon–6 PM
  Drizzle, 41°5°
  40% chance · 0.03 in0.9 mm
3. Evening
  6 PM–midnight
  Cloudy, 36°2°
  40% chance
4. Overnight
  midnight–6 AM
  Partly cloudy, 29°−2°
  20% chance · 0.4 in1 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain and snow. Mostly cloudy, with a high near 48. Chance of precipitation is 40%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
39°4°–48°9°
Low, likely
25°−4°–41°5°
Typical high / low
51°11° / 24°−4°
Wind
7 mph11 km/h, gusts 15 mph24 km/h
UV peak
3
Sunday, Nov 1. Partly sunny. High 41°5°, low 28°−2°. Typical 51°11° / 24°−4°. Rain 0.14 in3.6 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 30°−1°
  20% chance · 0.1 in0.3 cm
2. Afternoon
  noon–6 PM
  Sunny, 42°5°
  20% chance
3. Evening
  6 PM–midnight
  Clear, 34°1°
  30% chance · 0.02 in0.5 mm
4. Overnight
  midnight–6 AM
  Clear, 30°−1°
  30% chance · 0.1 in0.3 cm
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
38°3°–47°8°
Low, likely
17°−8°–36°2°
Typical high / low
51°11° / 24°−4°
Wind
6 mph10 km/h, gusts 22 mph35 km/h
UV peak
4
Monday, Nov 2. Sunny. High 43°6°, low 27°−3°. Typical 50°10° / 24°−4°. Rain 0.05 in1.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 32°0°
  30% chance
2. Afternoon
  noon–6 PM
  Mostly sunny, 45°7°
  30% chance
3. Evening
  6 PM–midnight
  Clear, 35°1°
  30% chance
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
36°2°–51°11°
Low, likely
25°−4°–31°−1°
Typical high / low
50°10° / 24°−4°
Wind
6 mph9 km/h, gusts 23 mph37 km/h
UV peak
4

10 days15 days30 days

The outlook

Today
78% chance of rain, high 52°, low 30°.
Tomorrow
Dry, high 56°, low 34°, warming up.
Monday
Dry, high 56°, low 32°.
Rest of week
Highs 41–52°; chance of precipitation on Tuesday, Friday, Saturday.

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

Snake River near Irwin

4.8 mi

Below flood stage

Level: 4.8 ft
Flow: 1,420 cfs

Forecast peak 4.8 ft Sat 6 PM

Reading from Sat 4:30 PM · NWS gauge page

Eastern Idaho Reservoirs at Palisades

6.3 mi

Below flood stage

Level: 5517 ft

Forecast peak 5521 ft Tue 5 AM

Reading from Sat 4:30 PM · NWS gauge page

Snake River near Heise

24 mi

Below flood stage

Level: 2.1 ft
Flow: 2,060 cfs

Forecast peak 2.0 ft Sat 6 PM

Reading from Sat 4:30 PM · NWS gauge page

Fish Creek (WY) at Wilson

22 mi

Below flood stage

Level: 2.4 ft
Flow: 133 cfs

Reading from Sat 5 PM · NWS gauge page

For your home

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

Heating this week

About 75% less heating than a typical week.

This week 46Typical 180

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 34
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 29 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 37°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?

Swan Valley · official normals 1991–2020 · records 1960–2026

Oct 24, today vs a typical year

Today’s expected high is 3°2° colder than typical.

Last 7 days vs normal

On average 11°6° warmer than normal (daily mean temperature).

+9°+5°MonOct 19
+11°+6°TueOct 20
+15°+8°WedOct 21
+16°+9°ThuOct 22
+14°+8°FriOct 23
+3°+2°SatOct 24
—SunOct 25

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

Sun & moon

Sun

Daylight: 10 h 37 min; Losing 2 min 44 s a day; shortest Dec 21, 1 h 40 min less
Golden hour: 5:47–6:45 PM; Morning 7:32–8:30 AM
Blue hour: 6:45–6:56 PM; Morning 7:21–7:32 AM; first light 7:21 AM

Stars tonight? Fair

Clear 6:56 PM–2 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

98% lit · growing

Today: sets 6:06 AM · rises 5:27 PM
Full moon: Oct 25
New moon: Nov 9

Looking east from Irwin. The highest point on the skyline is about 9,800 ft, 29 mi away.Skyline from USGS elevation data, heights drawn up to 2× taller. Sky, sun and moon as they are now.

Irwin, ID weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Snake River near Irwin

Eastern Idaho Reservoirs at Palisades

Snake River near Heise

Fish Creek (WY) at Wilson

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