Arapahoe County, Colorado, United States

Last updated: 7:23 AM CDT · Refresh

16°C

Feels like 16°

Mostly Clear

▲ 26° / ▼ 14°

Wind

6 mph SW

Humidity

81%

Dew Point

14°

Pressure

24.62 inHg

Visibility

8 mi

UV Index

1.1

Cloud Cover

15%

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 77% around 5 PM. Atmospheric instability is elevated (CAPE up to 1273 J/kg) — isolated convective development possible. Sunrise: 6:08AM · Sunset: 7:53PM.

51 AQI · Moderate Dominant: O3 Air Quality

Hourly Forecast · Next 24 Hours

Now

16°

15%

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°

55%

2 PM

24°

60%

3 PM

24°

63%

4 PM

23°

68%

5 PM

24°

77%

6 PM

22°

59%

7 PM

22°

63%

8 PM

21°

63%

9 PM

18°

44%

10 PM

18°

40%

11 PM

17°

41%

12 AM

17°

32%

1 AM

16°

32%

2 AM

16°

22%

3 AM

16°

19%

4 AM

15°

19%

5 AM

14°

10%

7-Day Forecast

Today

26° 14°

Partly Cloudy with a 63% chance of rain.

Sun

29° 14°

Partly Cloudy with a 58% chance of rain.

Mon

31° 14°

Mostly Clear.

Tue

32° 16°

Mostly Cloudy.

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 SW 81%

7 AM 16° Mostly Clear 31% 6 mph WSW 72%

8 AM 18° Mostly Clear 24% 5 mph WSW 66%

9 AM 20° Mostly Clear 35% 4 mph WNW 59%

10 AM 21° Mostly Clear 35% 4 mph NNW 55%

11 AM 22° Partly Cloudy 35% 5 mph NNE 51%

12 PM 23° Partly Cloudy 42% 6 mph NE 48%

1 PM 24° Partly Cloudy 55% 7 mph NE 46%

2 PM 24° Partly Cloudy 60% 8 mph ENE 46%

3 PM 24° Partly Cloudy 63% 8 mph E 49%

4 PM 23° Partly Cloudy 68% 5 mph E 57%

5 PM 24° Rain 77% 7 mph E 64%

6 PM 22° Partly Cloudy 59% 7 mph ESE 70%

7 PM 22° Partly Cloudy 63% 4 mph ESE 75%

8 PM 21° Partly Cloudy 63% 5 mph E 79%

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

10 PM 18° Partly Cloudy 40% 4 mph S 85%

11 PM 17° Mostly Clear 41% 4 mph S 87%

12 AM 17° Mostly Clear 32% 4 mph S 88%

1 AM 16° Mostly Clear 32% 3 mph SSE 89%

2 AM 16° Mostly Clear 22% 3 mph SSE 90%

3 AM 16° Partly Cloudy 19% 3 mph SSE 90%

4 AM 15° Partly Cloudy 19% 3 mph S 89%

5 AM 14° Partly Cloudy 10% 3 mph S 88%

15-Day Forecast

Today

8/15

Partly Cloudy

63%

14°

26°

Sun

8/16

Partly Cloudy

58%

14°

29°

Mon

8/17

Mostly Clear

14°

31°

Tue

8/18

Mostly Cloudy

15%

16°

32°

Wed

8/19

Rain

67%

17°

28°

Thu

8/20

Mostly Clear

17%

13°

29°

Fri

8/21

Mostly Clear

15%

17°

31°

Sat

8/22

Partly Cloudy

39%

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°

30°

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

18 AQI 3.3 µg/m³

O₃

Ground-level ozone

Dominant

51 AQI 56 ppb

3-Day Outlook

DayAQICategoryO₃PM2.5

Sun 51 Moderate 51 18

Mon 51 Moderate 51 18

Tue 93 Moderate 93 26

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, 11:00'Z' · F0 · 130 (13 km CONUS/NA)

Hodograph · kt

0–1 1–3 3–6 6–9 km

Instability

SBCAPE22 J/kg

MLCAPE24 J/kg

MUCAPE34 J/kg

SBCIN-272 J/kg

MLCIN0 J/kg

Lifted Index-0.0

Kinematics

0–6 km Shear28 kt

0–1 km Shear8 kt

Eff. Shear—

0–1 km SRH-36

0–3 km SRH-6

Eff. SRH—

Storm Motion287° @ 23 kt

0–1 km EHI-0.0

Composite Parameters

Sig. Tornado0.0

STP (eff)—

Supercell—

K-Index—

Thermo & Levels

PWAT1.09 in

0–3 km LR5.5 °C/km

700–500 LR6.7 °C/km

Total Totals—

LCL801 hPa

LFC589 hPa

EL497 hPa

Freezing Lvl9,823 ft

Arapahoe County, Colorado, United States

Alerts