Observed 5:30 AM MDT at KRIW

Johnstown, WY weather

Overcast and 36°2°.

Mostly agree

Now 36°2°

Cloudy · Feels like 28°−2°

Feels like: 28°−2°; Wind chill from 10 mph17 km/h wind · air 36°2°
Wind: 10 mph17 km/h; From the northeast. 610–10 mph17 km/h through 5 PM
Dew point: 28°−2°; Dry, static shocks likely
UV index: 0Low; Moderate 12–3 PM · peak 3
Air quality: 13Good; Main pollutant: PM10 (dust)

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

High 48°9° today at 5 PM
Below 40°4° tonight after 9 PM
Below freezing tomorrow 4–9 AM (low 29°−2°)

This morningUp to 41°5° by 11 AM · rain chance 10% · Cloudy
This afternoonUp to 48°9° by 5 PM · Partly cloudy
TonightDown to 31°−1° by 4 AM · freezing, low 31°−1° · Partly cloudy
Tomorrow morningUp to 42°6° by 11 AM · rain chance 20% · freezing, low 29°−2° · Mostly cloudy
Tomorrow afternoonUp to 49°9° by 4 PM · Mostly cloudy · rain chance 30%
Tomorrow nightDown to 33°1° by 4 AM · 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 5a	Cloudy	36°2° (likely 36°2° to 38°3°)	31°−1°	10%	7 mph11 km/h from ENE, gusts 11 mph17 km/h	82%	95%	0
Sat 6a	Cloudy	37°3° (likely 36°2° to 38°3°)	32°0°	5%	7 mph11 km/h from E, gusts 12 mph19 km/h	79%	99%	0
Sat 7a	Cloudy	37°3° (likely 36°2° to 38°3°)	32°0°	0%	7 mph11 km/h from ENE, gusts 12 mph19 km/h	79%	99%	0
Sat 8a	Cloudy	36°2° (likely 36°2° to 38°3°)	30°−1°	0%	8 mph13 km/h from ENE, gusts 9 mph14 km/h	75%	99%	0
Sat 9a	Cloudy	36°2° (likely 36°2° to 39°4°)	29°−2°	0%	10 mph16 km/h from ENE, gusts 7 mph11 km/h	71%	99%	0
Sat 10a	Cloudy	39°4° (likely 38°3° to 40°4°)	33°1°	0%	8 mph13 km/h from E, gusts 6 mph9 km/h	69%	94%	1
Sat 11a	Partly sunny	41°5° (likely 39°4° to 42°6°)	37°3°	0%	6 mph10 km/h from E, gusts 6 mph10 km/h	66%	71%	2
Sat 12p	Mostly sunny	42°6° (likely 40°4° to 43°6°)	38°3°	0%	6 mph10 km/h from E, gusts 6 mph10 km/h	60%	66%	3
Sat 1p	Mostly sunny	45°7° (likely 42°6° to 45°7°)	42°6°	0%	6 mph10 km/h from E, gusts 5 mph9 km/h	57%	60%	3
Sat 2p	Cloudy	46°8° (likely 44°7° to 47°8°)	42°6°	0%	7 mph11 km/h from E, gusts 5 mph7 km/h	53%	75%	3
Sat 3p	Cloudy	47°8° (likely 45°7° to 48°9°)	44°7°	0%	7 mph11 km/h from E, gusts 7 mph12 km/h	51%	67%	2
Sat 4p	Sunny	47°8° (likely 46°8° to 48°9°)	44°7°	0%	7 mph11 km/h from ESE, gusts 7 mph11 km/h	52%	19%	1
Sat 5p	Mostly sunny	48°9° (likely 45°7° to 48°9°)	45°7°	0%	6 mph10 km/h from ESE, gusts 6 mph10 km/h	54%	53%	1
Sat 6p	Mostly clear	47°8° (likely 44°7° to 47°8°)	45°7°	0%	5 mph8 km/h from E, gusts 6 mph9 km/h	56%	56%	0
Sat 7p	Mostly clear	43°6° (likely 41°5° to 43°6°)	41°5°	0%	3 mph5 km/h from E, gusts 5 mph7 km/h	65%	62%	0
Sat 8p	Partly cloudy	42°6° (likely 39°4° to 42°6°)	42°6°	0%	2 mph3 km/h from E, gusts 3 mph5 km/h	69%	54%	0
Sat 9p	Cloudy	39°4° (likely 38°3° to 40°4°)	39°4°	0%	2 mph3 km/h from NE, gusts 4 mph6 km/h	70%	69%	0
Sat 10p	Cloudy	38°3° (likely 37°3° to 39°4°)	38°3°	0%	2 mph3 km/h from NNE, gusts 3 mph5 km/h	71%	67%	0
Sat 11p	Cloudy	37°3° (likely 35°2° to 38°3°)	34°1°	0%	3 mph5 km/h from N, gusts 5 mph7 km/h	70%	63%	0
Sun 12a	Clear	36°2° (likely 34°1° to 37°3°)	32°0°	0%	5 mph8 km/h from NNW, gusts 5 mph8 km/h	72%	25%	0
Sun 1a	Clear	35°2° (likely 33°1° to 37°3°)	31°−1°	0%	5 mph8 km/h from NNW, gusts 6 mph10 km/h	75%	20%	0
Sun 2a	Clear	34°1° (likely 32°0° to 36°2°)	29°−2°	0%	6 mph10 km/h from NW, gusts 6 mph10 km/h	76%	17%	0
Sun 3a	Clear	34°1° (likely 31°−1° to 35°2°)	29°−2°	0%	6 mph10 km/h from NW, gusts 6 mph9 km/h	76%	21%	0
Sun 4a	Clear	31°−1° (likely 31°−1° to 35°2°)	26°−3°	0%	5 mph8 km/h from NW, gusts 6 mph10 km/h	81%	25%	0
Sun 5a	Partly cloudy	31°−1° (likely 31°−1° to 35°2°)	28°−2°	0%	3 mph5 km/h from NW, gusts 5 mph8 km/h	83%	36%	0
Sun 6a	Cloudy	31°−1° (likely 31°−1° to 35°2°)	31°−1°	0%, 0.01 in0.3 mm	2 mph3 km/h from NW, gusts 4 mph7 km/h	84%	60%	0
Sun 7a	Cloudy	29°−2° (likely 29°−2° to 35°2°)	29°−2°	0%, 0.01 in0.3 mm	2 mph3 km/h from NW, gusts 4 mph6 km/h	91%	64%	0
Sun 8a	Cloudy	31°−1° (likely 31°−1° to 35°2°)	28°−2°	10%, 0.01 in0.3 mm	3 mph5 km/h from NW, gusts 5 mph9 km/h	86%	68%	0
Sun 9a	Snow	35°2° (likely 35°2° to 37°3°)	31°−1°	20%, 0.01 in0.3 mm	5 mph8 km/h from NW, gusts 4 mph6 km/h	77%	73%	0
Sun 10a	Snow	39°4° (likely 38°3° to 40°4°)	37°3°	20%, 0.01 in0.3 mm	3 mph5 km/h from N, gusts 6 mph10 km/h	72%	76%	2
Sun 11a	Snow	42°6° (likely 38°3° to 44°7°)	42°6°	20%, 0.01 in0.3 mm	2 mph3 km/h from ENE, gusts 4 mph7 km/h	69%	79%	3
Sun 12p	Cloudy	44°7° (likely 39°4° to 48°9°)	42°6°	5%	3 mph5 km/h from E, gusts 4 mph7 km/h	65%	80%	3
Sun 1p	Mostly cloudy	47°8° (likely 40°4° to 50°10°)	46°8°	10%	3 mph5 km/h from ESE, gusts 5 mph8 km/h	64%	79%	4
Sun 2p	Showers	48°9° (likely 42°6° to 52°11°)	46°8°	30%	5 mph8 km/h from ESE, gusts 7 mph11 km/h	61%	73%	4
Sun 3p	Showers	48°9° (likely 43°6° to 52°11°)	46°8°	20%	5 mph8 km/h from ESE, gusts 7 mph11 km/h	59%	67%	3
Sun 4p	Showers	49°9° (likely 44°7° to 52°11°)	47°8°	20%	5 mph8 km/h from SE, gusts 6 mph9 km/h	59%	67%	3
Sun 5p	Cloudy	48°9° (likely 44°7° to 52°11°)	46°8°	10%	5 mph8 km/h from ESE, gusts 5 mph8 km/h	61%	74%	1
Sun 6p	Partly cloudy	47°8° (likely 43°6° to 50°10°)	46°8°	5%	3 mph5 km/h from ESE, gusts 3 mph5 km/h	63%	78%	0
Sun 7p	Mostly clear	44°7° (likely 42°6° to 48°9°)	44°7°	5%	2 mph3 km/h from SE, gusts 6 mph9 km/h	72%	88%	0
Sun 8p	Cloudy	42°6° (likely 42°6° to 46°8°)	42°6°	5%	2 mph3 km/h from SSW, gusts 7 mph12 km/h	76%	90%	0
Sun 9p	Cloudy	40°4° (likely 40°4° to 45°7°)	40°4°	5%	2 mph3 km/h from W, gusts 5 mph8 km/h	77%	83%	0
Sun 10p	Partly cloudy	39°4° (likely 39°4° to 44°7°)	39°4°	5%	2 mph3 km/h from WNW, gusts 5 mph8 km/h	79%	77%	0
Sun 11p	Partly cloudy	39°4° (likely 38°3° to 44°7°)	39°4°	5%	2 mph3 km/h from NNW, gusts 4 mph6 km/h	81%	76%	0
Mon 12a	Cloudy	38°3° (likely 36°2° to 43°6°)	38°3°	0%	2 mph3 km/h from NNW, gusts 4 mph6 km/h	82%	70%	0
Mon 1a	Cloudy	37°3° (likely 31°−1° to 43°6°)	37°3°	0%	2 mph3 km/h from NNW, gusts 3 mph5 km/h	83%	76%	0
Mon 2a	Cloudy	35°2° (likely 29°−2° to 42°6°)	35°2°	0%	2 mph3 km/h from NW, gusts 4 mph7 km/h	84%	75%	0
Mon 3a	Cloudy	34°1° (likely 27°−3° to 41°5°)	34°1°	0%	2 mph3 km/h from WNW, gusts 4 mph6 km/h	86%	75%	0
Mon 4a	Partly cloudy	33°1° (likely 26°−3° to 40°4°)	33°1°	0%	2 mph3 km/h from WNW, gusts 4 mph6 km/h	89%	71%	0

Days ahead

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

Today, Oct 24. Cloudy. High 49°9°, low 34°1°. Typical 55°13° / 29°−2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 48°9°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 42°6°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 31°−1°
  Dry
Official NWS forecast
Today: Partly sunny, with a high near 49. East wind 6 to 10 mph.
Tonight: Mostly cloudy, with a low around 34. East northeast wind around 7 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
46°8°–49°9°
Low, likely
34°1°–37°3°
Typical high / low
55°13° / 29°−2°
Wind
16 mph25 km/h, gusts 28 mph45 km/h
UV peak
4
Tomorrow, Oct 25. Snow. High 50°10°, low 30°−1°. Typical 54°12° / 28°−2°. Snow 0.05 in1.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Snow, 31°−1°
  20% chance · 0.06 in1.5 mm
2. Afternoon
  noon–6 PM
  Showers, 49°9°
  30% chance
3. Evening
  6 PM–midnight
  Cloudy, 42°6°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 33°1°
  Dry
Official NWS forecast
Day: A chance of rain and snow showers between 9am and 5pm. Partly sunny, with a high near 50. Northeast wind around 5 mph. Chance of precipitation is 30%.
Night: Partly cloudy, with a low around 30. Northwest wind around 3 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
44°7°–52°11°
Low, likely
30°−1°–34°1°
Typical high / low
54°12° / 28°−2°
Wind
7 mph11 km/h
UV peak
4
Monday, Oct 26. Partly sunny. High 54°12°, low 32°0°. Typical 54°12° / 28°−2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 33°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 56°13°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 46°8°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 37°3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 54. North northeast wind around 3 mph.
Night: Partly cloudy, with a low around 32. Northwest wind 2 to 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
53°12°–57°14°
Low, likely
27°−3°–38°3°
Typical high / low
54°12° / 28°−2°
Wind
6 mph10 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 56°13°, low 30°−1°. Typical 54°12° / 27°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 53°11°
  Dry
3. Evening
  6 PM–midnight
  Clear, 43°6°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 30°−1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 56.
Night: Partly cloudy, with a low around 30.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
50°10°–56°13°
Low, likely
27°−3°–40°4°
Typical high / low
54°12° / 27°−3°
Wind
24 mph39 km/h, gusts 35 mph56 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 55°13°, low 30°−1°. Typical 53°12° / 27°−3°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 30°−1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 53°12°
  Dry
3. Evening
  6 PM–midnight
  Clear, 43°6°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 32°0°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 55.
Night: Partly cloudy, with a low around 30.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
52°11°–55°13°
Low, likely
24°−4°–34°1°
Typical high / low
53°12° / 27°−3°
Wind
10 mph16 km/h, gusts 29 mph46 km/h
UV peak
4
Thursday, Oct 29. Cloudy. High 58°14°, low 33°1°. Typical 52°11° / 27°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 33°0°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 56°13°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 49°9°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 37°3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 58.
Night: Partly cloudy, with a low around 33.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
55°13°–59°15°
Low, likely
25°−4°–38°3°
Typical high / low
52°11° / 27°−3°
Wind
9 mph14 km/h, gusts 16 mph25 km/h
UV peak
4
Friday, Oct 30. Partly sunny. High 58°14°, low 36°2°. Typical 52°11° / 26°−3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 60°15°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 39°4°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 58.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
56°13°–62°17°
Low, likely
29°−2°–43°6°
Typical high / low
52°11° / 26°−3°
Wind
11 mph17 km/h, gusts 24 mph38 km/h
UV peak
4
Saturday, Oct 31. Cloudy. High 51°11°, low 34°1°. Typical 52°11° / 26°−3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 39°4°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 52°11°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 41°5°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 30°−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
47°8°–55°13°
Low, likely
24°−4°–39°4°
Typical high / low
52°11° / 26°−3°
Wind
18 mph29 km/h
UV peak
3
Sunday, Nov 1. Mostly sunny. High 48°9°, low 30°−1°. Typical 51°11° / 25°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 31°0°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 49°9°
  Dry
3. Evening
  6 PM–midnight
  Clear, 41°5°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 34°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
45°7°–53°12°
Low, likely
17°−8°–37°3°
Typical high / low
51°11° / 25°−4°
Wind
26 mph42 km/h
UV peak
4
Monday, Nov 2. Cloudy. High 47°8°, low 34°1°. Typical 51°11° / 25°−4°. Rain 0.24 in6.1 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 37°3°
  20% chance · 0.3 in0.8 cm
2. Afternoon
  noon–6 PM
  Cloudy, 49°10°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 40°4°
  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
41°5°–52°11°
Low, likely
32°0°–35°2°
Typical high / low
51°11° / 25°−4°
Wind
7 mph11 km/h, gusts 14 mph22 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 49°, low 34°.
Tomorrow
Dry, high 50°, low 30°.
Monday
Dry, high 54°, low 32°, warming up.
Rest of week
Mostly dry, highs 47–58°.

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

Wind River near Kinnear

2.2 mi

Below flood stage

Level: 4.0 ft
Flow: 536 cfs

Reading from Sat 4 AM · NWS gauge page

Wind River below Below Diversion Dam at Highway 26 Bridge

13 mi

Below flood stage

Level: 2.7 ft
Flow: 871 cfs

Reading from Sat 4:45 AM · NWS gauge page

Wind River at Riverton

17 mi

Below flood stage

Level: 4.0 ft
Flow: 729 cfs

Reading from Sat 4 AM · NWS gauge page

Little Wind River near Riverton

18 mi

Below flood stage

Level: 2.7 ft
Flow: 378 cfs

Reading from Sat 4:15 AM · NWS gauge page

For your home

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

Heating this week

About 71% less heating than a typical week.

This week 50Typical 172

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 42
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 11 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 28°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?

Pavillion · official normals 1991–2020 · records 1919–2026

Oct 24, today vs a typical year

Today’s expected high is 6°3° colder than typical.

Last 7 days vs normal

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

+5°+3°SunOct 18
+14°+8°MonOct 19
+7°+4°TueOct 20
+11°+6°WedOct 21
+10°+5°ThuOct 22
—FriOct 23
—SatOct 24

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

Sun & moon

Sun

Daylight: 10 h 38 min; Losing 2 min 44 s a day; shortest Dec 21, 1 h 39 min less
Golden hour: 5:38–6:35 PM; Morning 7:21–8:19 AM
Blue hour: 6:35–6:46 PM; Morning 7:10–7:21 AM; first light 7:10 AM

Stars tonight? Poor

Clouds most of the night (about 98% cover).

Moon

Waxing gibbous

96% lit · growing

Today: sets 5:55 AM · rises 5:17 PM
Full moon: Oct 25
New moon: Nov 9

Looking southwest from Johnstown. The highest point on the skyline is about 13,800 ft, 22 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Johnstown, WY weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Wind River near Kinnear

Wind River below Below Diversion Dam at Highway 26 Bridge

Wind River at Riverton

Little Wind River near Riverton

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? Poor

Moon