Arapahoe County, Colorado, United States

Last updated: 6:17 AM CDT · Refresh

16°C

Feels like 15°

Mostly Clear

▲ 26° / ▼ 14°

Wind

6 mph SSW

Humidity

86%

Dew Point

14°

Pressure

24.62 inHg

Visibility

7 mi

UV Index

0.0

Cloud Cover

22%

Sunrise

6:08 AM

Sunset

7:53 PM

Drag to pan · double-click to forecast a point

WeatherAI™ Analysis

WeatherAI Analysis: Arapahoe County is currently mostly clear at 16°C. Precipitation is likely — peak probability 73% around 5 PM. Atmospheric instability is elevated (CAPE up to 1276 J/kg) — isolated convective development possible. Sunrise: 6:08AM · Sunset: 7:53PM.

64 AQI · Moderate Dominant: O3 Air Quality

Hourly Forecast · Next 24 Hours

Now

16°

15%

6 AM

14°

31%

7 AM

16°

31%

8 AM

18°

24%

9 AM

20°

35%

10 AM

21°

35%

11 AM

22°

35%

12 PM

23°

42%

1 PM

24°

53%

2 PM

24°

56%

3 PM

24°

63%

4 PM

23°

68%

5 PM

24°

73%

6 PM

23°

56%

7 PM

22°

46%

8 PM

21°

63%

9 PM

18°

44%

10 PM

18°

45%

11 PM

17°

41%

12 AM

16°

24%

1 AM

16°

24%

2 AM

16°

14%

3 AM

16°

11%

4 AM

16°

11%

7-Day Forecast

Today

26° 14°

Partly Cloudy with a 73% chance of rain.

Sun

29° 14°

Partly Cloudy with a 58% chance of rain.

Mon

31° 14°

Mostly Clear.

Tue

32° 16°

Overcast.

Wed

28° 17°

Rain, 67% chance.

Thu

29° 13°

Mostly Clear.

Fri

31° 17°

Mostly Clear.

+ Feels like

TimeTempConditionsPrecipWindHumidity

Now 16° Mostly Clear 15% 6 mph SSW 86%

6 AM 14° Mostly Clear 31% 6 mph SW 79%

7 AM 16° Mostly Clear 31% 6 mph WSW 74%

8 AM 18° Partly Cloudy 24% 6 mph WSW 67%

9 AM 20° Partly Cloudy 35% 5 mph W 60%

10 AM 21° Partly Cloudy 35% 5 mph NW 55%

11 AM 22° Partly Cloudy 35% 6 mph N 51%

12 PM 23° Partly Cloudy 42% 7 mph NE 48%

1 PM 24° Partly Cloudy 53% 8 mph NE 47%

2 PM 24° Partly Cloudy 56% 8 mph ENE 46%

3 PM 24° Partly Cloudy 63% 8 mph E 48%

4 PM 23° Partly Cloudy 68% 6 mph E 55%

5 PM 24° Partly Cloudy 73% 7 mph E 64%

6 PM 23° Partly Cloudy 56% 7 mph SE 71%

7 PM 22° Partly Cloudy 46% 4 mph SE 74%

8 PM 21° Partly Cloudy 63% 4 mph S 78%

9 PM 18° Partly Cloudy 44% 4 mph SSW 82%

10 PM 18° Partly Cloudy 45% 3 mph ENE 84%

11 PM 17° Partly Cloudy 41% 3 mph SE 86%

12 AM 16° Mostly Clear 24% 3 mph SSE 88%

1 AM 16° Partly Cloudy 24% 3 mph SE 89%

2 AM 16° Partly Cloudy 14% 3 mph SE 90%

3 AM 16° Partly Cloudy 11% 3 mph SE 90%

4 AM 16° Partly Cloudy 11% 3 mph S 89%

15-Day Forecast

Today

8/15

Partly Cloudy

73%

14°

26°

Sun

8/16

Partly Cloudy

58%

14°

29°

Mon

8/17

Mostly Clear

14°

31°

Tue

8/18

Overcast

15%

16°

32°

Wed

8/19

Rain

67%

17°

28°

Thu

8/20

Mostly Clear

15%

13°

29°

Fri

8/21

Mostly Clear

15%

17°

31°

Sat

8/22

Drizzle

47%

17°

32°

Sun

8/23

Rain

66%

19°

33°

Mon

8/24

Rain

67%

19°

29°

Tue

8/25

Drizzle

60%

18°

30°

Wed

8/26

Drizzle

60%

18°

30°

Thu

8/27

Drizzle

60%

18°

31°

Fri

8/28

Drizzle

60%

18°

30°

Sat

8/29

Drizzle

60%

17°

28°

Moderate

U.S. Air Quality Index · Dominant: O3

50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today

PM_2.5

Fine particulate matter

29 AQI 5.3 µg/m³

O₃

Ground-level ozone

Dominant

64 AQI 60 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Today 64 Moderate 64 29

Sun 54 Moderate 54 24

Mon 46 Good 46 16

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. PM_2.5 (fine particles) is reported in µg/m³ and ozone (O₃) in ppb. Forecast source: NWS NAQFC.

Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio

RAP

Valid Sat Aug 15, 10:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE27 J/kg

MLCAPE21 J/kg

MUCAPE93 J/kg

SBCIN-265 J/kg

MLCIN-211 J/kg

Lifted Index-0.4

Kinematics

0–6 km Shear30 kt

0–1 km Shear8 kt

Eff. Shear—

0–1 km SRH-31

0–3 km SRH-6

Eff. SRH—

Storm Motion289° @ 23 kt

0–1 km EHI-0.0

Composite Parameters

Sig. Tornado0.0

STP (eff)—

Supercell—

K-Index—

Thermo & Levels

PWAT1.11 in

0–3 km LR5.2 °C/km

700–500 LR6.8 °C/km

Total Totals—

LCL808 hPa

LFC579 hPa

EL486 hPa

Freezing Lvl9,957 ft

Arapahoe County, Colorado, United States

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