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Forecast confidence: Medium · models disagree by 6°F

Southglenn weather

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Drizzle,rain likely tomorrow

NWS, the American and the European model put Southglenn's high today between 80° and 86°, a 6° split. Tomorrow looks drizzle around 76°, with a 99% chance of rain, and the models disagree, so treat it as uncertain.

83°59°
76°54°
70°51°
73°52°
78°53°
76°55°
Todaysplit ±6°Tomorrowsplit ±8°Sundaysplit ±7°Mondaysplit ±10°Tuesdaysplit ±8°Wednesdaymodels agree
NWSNational Blend (NBM)
80°
Drizzle
Today 80°·Low 60°·Rain 41%
AmericanNOAA GFS
86°
Cloudy
Today 86°·Low 60°·Rain 41%
EuropeanECMWF
82°
Heavy drizzle
Today 82°·Low 57°·Rain 71%
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Southglenn weather alerts and warnings

active National Weather Service watches, warnings and advisories

Checking the National Weather Service for active alerts covering Southglenn…

Southglenn weather in numbers

from 30 years of measured normals

Southglenn swings 77°F across the year, from 89°F highs in July to 12°F lows in January, and May is usually the wettest month in a year that brings about 20 in of precipitation.

Warmest month
July
89°F average high
Coldest month
January
12°F average low
Wettest month
May
20 in a year
Below freezing
5 months
January, February, March, November and December
Comfortable
2 months
April and October
Residents
42,000
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The weather map: all three models at once

NWS, American, European side by side around Southglenn and nearby towns.Live rain radar →
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Southglenn hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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Southglenn 10-day forecast, out to 14 days

where the models agree, and where they split
Today
Drizzle
83° 59°
±6°
Tomorrow
Drizzle
76° 54°
±8°
Sun
Light drizzle
70° 51°
±7°
Mon
Light drizzle
73° 52°
±10°
Tue
Light drizzle
78° 53°
±8°
Wed
Partly cloudy
76° 55°
models agree
Thu
Cloudy
78° 55°
models agree
Fri
Partly cloudy
78° 56°
±11°
Sat
Mostly clear
80° 59°
±9°
Sun
Mostly clear
80° 53°
±5°
Mon
Light drizzle
75° 52°
±8°
Tue
Cloudy
80° 50°
±13°
Wed
Cloudy
83° 54°
models agree
Thu
Mostly clear
85° 53°
models agree

Southglenn, Colorado (CO) is at its warmest in Jul (average highs near 89°F) and coldest in Jan (lows around 12°F), with roughly 20 in of precipitation across the year. Below, compare what NWS, American, European forecast for Southglenn right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

Southglenn climate by month

average daytime high and overnight low across a typical year
Jan
36°
12°
Feb
46°
16°
Mar
50°
23°
Apr
62°
33°
May
71°
43°
Jun
83°
54°
Jul
89°
58°
Aug
89°
60°
Sep
82°
51°
Oct
70°
40°
Nov
52°
26°
Dec
48°
24°

Which forecast is most accurate in Southglenn?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
American logo
American ★ Best
79
/100rank #1
88±1.2°F86±4.3 mph6581% hitNOAA / NCEP (United States)College Park, Maryland, USA
European logo
European
77
/100rank #2
86±1.4°F95±1.6 mph5374% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom

The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
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AmericanNOAA GFS
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EuropeanECMWF
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Where the models disagree

temperature and rain, judged separately
DayTemperatureRain
Today±6°80° to 86°±30%41% to 71% chance
Tomorrow±8°72° to 80°±65%34% to 99% chance
Sun±7°67° to 74°±44%42% to 86% chance
Mon±10°69° to 79°±26%16% to 42% chance
Tue±8°75° to 83°±22%27% to 49% chance

The models often agree on temperature and still split on rain, and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.

Sunrise and sunset in Southglenn

today, local time
Sunrise
06:43
Sunset
19:03
Daylight
12h 20m

Common questions

What's the weather in Southglenn today?
On this page we show what NWS, American, European each forecast for Southglenn today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Southglenn today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Southglenn and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Southglenn?
Over the last 30 days, the American model has been the most accurate for Southglenn (CheckWeather Score 79/100), ahead of the European at 77. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Southglenn?
July is typically the warmest month in Southglenn, with average highs around 89°F.
How cold does Southglenn get?
The coldest month in Southglenn is January, when overnight lows average about 12°F.
How much rain does Southglenn get?
Southglenn sees roughly 20 in of precipitation a year, with May usually the wettest month.

Nearby

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