Extreme Heat Warning — San Juan and Vicinity, PR, Northeast, PR, Southeast, PR, Eastern Interior, PR, North Central, PR, Central Interior, PR, Ponce and Vicinity, PR, Northwest, PR, Western Interior, PR, Mayaguez and Vicinity, PR, Southwest, PR 4:00 PM

Cheyenne, Wyoming

Last updated: 8:27 AM CDT  ·  Refresh
18°C
Feels like 16°
Mostly Cloudy
▲ 28°  /  ▼ 13°
Wind
5 mph NW
Humidity
54%
Dew Point
10°
Pressure
23,99 inHg
Visibility
10 mi
UV Index
2,0
Cloud Cover
69%
Sunrise
6:30 AM
Sunset
7:21 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: Cheyenne is currently mostly cloudy at 18°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 546 J/kg) — isolated convective development possible. Sunrise: 6:30AM · Sunset: 7:21PM.

Alerts

Extreme Heat Warning
San Juan and Vicinity, PR, Northeast, PR, Southeast, PR, Eastern Interior, PR, North Central, PR, Central Interior, PR, Ponce and Vicinity, PR, Northwest, PR, Western Interior, PR, Mayaguez and Vicinity, PR, Southwest, PR
Expires 4:00 PM
34 AQI · Good Dominant: O3 Air Quality
Hourly Forecast · Next 24 Hours
Now
18°
10%
8 AM
18°
7%
9 AM
21°
15%
10 AM
23°
18%
11 AM
24°
18%
12 PM
26°
26%
1 PM
28°
37%
2 PM
28°
33%
3 PM
27°
37%
4 PM
27°
41%
5 PM
28°
31%
6 PM
27°
32%
7 PM
25°
32%
8 PM
23°
32%
9 PM
21°
24%
10 PM
20°
35%
11 PM
19°
14%
12 AM
19°
6%
1 AM
18°
7%
2 AM
16°
5%
3 AM
16°
3%
4 AM
15°
3%
5 AM
13°
3%
6 AM
14°
3%
7-Day Forecast
Today
28° 13°
Mostly Cloudy with a 41% chance of rain.
Tue
28° 13°
Mostly Clear with a 25% chance of rain.
Wed
27° 9°
Clear.
Thu
29° 8°
Clear.
Fri
28° 13°
Partly Cloudy.
Sat
29° 9°
Rain, 57% chance.
Sun
28° 12°
Rain, 63% chance.
TimeTempConditionsPrecipWindHumidity
Now 18° Mostly Cloudy 10% 5 mph NW 54%
8 AM 18° Mostly Cloudy 7% 6 mph WNW 47%
9 AM 21° Partly Cloudy 15% 9 mph W 41%
10 AM 23° Partly Cloudy 18% 12 mph W 36%
11 AM 24° Mostly Cloudy 18% 14 mph WSW 32%
12 PM 26° Mostly Cloudy 26% 14 mph WSW 30%
1 PM 28° Mostly Cloudy 37% 14 mph WSW 30%
2 PM 28° Mostly Cloudy 33% 13 mph WSW 31%
3 PM 27° Partly Cloudy 37% 13 mph WSW 33%
4 PM 27° Partly Cloudy 41% 12 mph WSW 35%
5 PM 28° Partly Cloudy 31% 11 mph WSW 37%
6 PM 27° Mostly Cloudy 32% 9 mph SW 40%
7 PM 25° Rain 32% 5 mph SSW 46%
8 PM 23° Rain 32% 5 mph S 52%
9 PM 21° Rain 24% 4 mph SSW 55%
10 PM 20° Partly Cloudy 35% 4 mph W 54%
11 PM 19° Partly Cloudy 14% 4 mph WNW 53%
12 AM 19° Partly Cloudy 6% 5 mph NW 53%
1 AM 18° Partly Cloudy 7% 6 mph NW 52%
2 AM 16° Mostly Clear 5% 7 mph NW 51%
3 AM 16° Mostly Clear 3% 7 mph NW 50%
4 AM 15° Mostly Clear 3% 7 mph NW 49%
5 AM 13° Mostly Clear 3% 8 mph NW 47%
6 AM 14° Mostly Clear 3% 8 mph NW 44%
15-Day Forecast
Today
9/7
Mostly Cloudy
41%
13°
28°
Tue
9/8
Mostly Clear
25%
13°
28°
Wed
9/9
Clear
5%
9°
27°
Thu
9/10
Clear
3%
8°
29°
Fri
9/11
Partly Cloudy
10%
13°
28°
Sat
9/12
Rain
57%
9°
29°
Sun
9/13
Rain
63%
12°
28°
Mon
9/14
Drizzle
38%
6°
22°
Tue
9/15
Clear
35%
4°
23°
Wed
9/16
Drizzle
47%
8°
23°
Thu
9/17
Drizzle
60%
13°
23°
Fri
9/18
Drizzle
60%
12°
23°
Sat
9/19
Drizzle
60%
12°
22°
Sun
9/20
Drizzle
60%
12°
24°
Mon
9/21
Clear
60%
12°
24°
34
Good
U.S. Air Quality Index · Dominant: O3
50 100 150 200

Air quality is satisfactory and poses little or no health risk.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
32 AQI 5.8 µg/m³
O3
Ground-level ozone
Dominant
34 AQI 37 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Tue 34 Good 34 32
Wed 43 Good 43 38
Thu 46 Good 44 46
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid lun. sept. 7, 11:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 50 60 70 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE0 J/kg
MLCAPE12 J/kg
MUCAPE0 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index1.3
Kinematics
0–6 km Shear44 kt
0–1 km Shear23 kt
Eff. Shear—
0–1 km SRH-102
0–3 km SRH-38
Eff. SRH—
Storm Motion258° @ 33 kt
0–1 km EHI-0.0
Composite Parameters
Sig. Tornado0.0
STP (eff)—
Supercell—
K-Index—
Thermo & Levels
PWAT0.95 in
0–3 km LR6.0 °C/km
700–500 LR7.4 °C/km
Total Totals—
LCL718 hPa
LFC812 hPa
EL812 hPa
Freezing Lvl9,790 ft