As of 3:15 AM

Clear

Feels like

Today101°71°

Wind6mph SSE

Humidity34%

UV index–

Littleton5,358 ft

Historic south metro along the South Platte.

The outlook

A Heat Advisory is in effect until 9 PM tonight. Expect near 100 degree temperatures today. Monsoonal moisture arrives Tuesday, bringing a chance for locally heavy rain through Thursday.

Next 10 hours71°–97°

97°71°

74°Now

75°4 AM

73°5 AM

71°6 AM

74°7 AM

80°8 AM

85°9 AM

90°10 AM

94°11 AM

97°12 PM

The days ahead

Rest of today

through midnight

101°71°

Overcast

Tomorrow

Tue

96°72°

Overcast · colder

Wed

95°69°

Rain · colder

Rest of the week

Thu–Sun

104°71°

Temperatures warming, rain Thu

The record high for July 20 is 96°, set in 2018.

2026 is running 6.6° warmer than the archive average so far.

Today is running 10° above the seasonal average for this date.

This heating season is running 22% milder than normal so far.

Right now

Conditions

Wind: mph SSE
Humidity
Pressure

Minute-by-minute precipitation isn't available for this city right now.

Next 48 hours

Hourly forecast

Mon, Jul 20 → Wed, Jul 22Mountain · midnight starts a new day

Mon, Jul 20Now74°–6 mph

4 AM75°–7 mph

5 AM73°–5 mph

6 AM71°–5 mph

7 AM74°–2 mph

8 AM80°–2 mph

9 AM85°–3 mph

10 AM90°–4 mph

11 AM94°–6 mph

12 PM97°–5 mph

1 PM99°–5 mph

2 PM101°–6 mph

3 PM101°1%9 mph

4 PM101°2%7 mph

5 PM101°5%9 mph

6 PM97°7%12 mph

7 PM96°9%7 mph

8 PM93°19%12 mph

9 PM90°17%1 mph

10 PM86°9%5 mph

11 PM83°11%8 mph

Tue, Jul 2112 AM82°5%6 mph

1 AM78°3%4 mph

2 AM76°2%4 mph

3 AM75°1%6 mph

4 AM74°1%2 mph

5 AM73°1%2 mph

6 AM72°1%3 mph

7 AM75°1%5 mph

8 AM77°1%10 mph

9 AM80°1%11 mph

10 AM83°1%10 mph

11 AM86°1%9 mph

12 PM89°2%8 mph

1 PM92°3%6 mph

2 PM94°3%6 mph

3 PM96°30%7 mph

4 PM92°30%16 mph

5 PM88°30%13 mph

6 PM91°30%15 mph

7 PM90°39%14 mph

8 PM86°39%12 mph

9 PM85°39%9 mph

10 PM82°39%3 mph

11 PM80°39%13 mph

Wed, Jul 2212 AM76°39%8 mph

1 AM76°–7 mph

2 AM76°–6 mph

7-day outlook

The week ahead

Today
Overcast · 19% precip
101°71°
Tue
Overcast · 39% precip
96°72°
Wed
Rain · 59% precip
95°69°
Thu
Rain · 88% precip
93°71°
Fri
Overcast · 63% precip
99°71°
Sat
Drizzle · 26% precip
101°73°
Sun
Overcast · 39% precip
104°74°

Sun & Moon

Light of day

sunrise

5:49 AM

sunset

8:23 PM

Daylight

14 hr 34 min

−1 min 30 sec vs yesterday

Moon

Waxing Crescent

Storm tracker

Live radar

Loading live radar…

Radar by RainViewer · 7-day precipitation forecast by Open-Meteo · basemap OpenFreeMap. Radar covers the past two hours plus a 30-minute nowcast; the 7-day layer is a precipitation forecast.

AdvancedAtmospheric detail & vertical profile

Atmospheric readings

Instability

10 J/kg

Stable air

Freezing level

17,421 ft

Altitude of the 32°F line

Cloud layers

low 0% · mid 0% · high 0%

Soil temp

67°

Ground surface

Vertical profile

Temperature and wind from the surface up through the upper atmosphere.

Climate

How today sits against the record

Open-Meteo archive, 2016–2026

This season's pace

A running total of heating and cooling demand in degree-days, measured against the multi-year average. It is a sum of degrees, not a count of days.

Heating degree-days· Since Oct 1

4,264(-22% vs normal)

Cooling degree-days· Since May 1

514(+48% vs normal)

Year to date

+6.6°warmer than the archive average

The year in temperature

2016–2026 avg

Average temperature each month, with heating and cooling degree-days, averaged across these years. This month is outlined.

July 20, across the years

2017–2025

Each bar is July 20 only: observed low at the bottom, high at the top. Accent fill is 2026. Dashed lines are the archive’s typical high/low for that date.

Legend

Frosted bars = other years
Solid accent = 2026
Accent dashes: avg high (July 20, archive mean).Neutral dashes: avg low for the same date.

Blended fromOpenWeatherOpen-MeteoNOAA GFSECMWFDWD ICONNWSradar by RainViewerupdated 3:59 AM Denver time

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