Skip to main content
One weather site to rule them all
checkweather.io
CheckWeather USThornton
Forecast confidence: Medium · models disagree by 6°F

Thornton weather

Loading live data…

Drizzle,rain likely tomorrow

NWS, the American and the European model put Thornton's high today between 80° and 86°, a 6° split. Tomorrow looks drizzle around 75°, with a 100% chance of rain.

83°61°
75°56°
71°53°
74°54°
78°56°
77°57°
Todaysplit ±6°Tomorrowsplit ±7°Sundaysplit ±6°Mondaysplit ±10°Tuesdaysplit ±7°Wednesdaymodels agree
NWSNational Blend (NBM)
80°
Drizzle
Today 80°·Low 62°·Rain 37%
AmericanNOAA GFS
86°
Cloudy
Today 86°·Low 61°·Rain 37%
EuropeanECMWF
83°
Light drizzle
Today 83°·Low 60°·Rain 67%
CheckWeather.io on iPhoneFree. No ads, no account.

Thornton weather alerts and warnings

active National Weather Service watches, warnings and advisories

Checking the National Weather Service for active alerts covering Thornton…

Thornton weather in numbers

from 30 years of measured normals

Thornton swings 75°F across the year, from 88°F highs in July to 13°F lows in January, and May is usually the wettest month in a year that brings about 19 in of precipitation.

Warmest month
July
88°F average high
Coldest month
January
13°F average low
Wettest month
May
19 in a year
Below freezing
5 months
January, February, March, November and December
Comfortable
2 months
April and October
Residents
133,000
share this forecast

The weather map: all three models at once

NWS, American, European side by side around Thornton and nearby towns.Live rain radar →
Loading the three model maps…

Thornton 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

Loading the three models…

Thornton 10-day forecast, out to 14 days

where the models agree, and where they split
Today
Drizzle
83° 61°
±6°
Tomorrow
Drizzle
75° 56°
±7°
Sun
Light drizzle
71° 53°
±6°
Mon
Light drizzle
74° 54°
±10°
Tue
Light drizzle
78° 56°
±7°
Wed
Light drizzle
77° 57°
models agree
Thu
Cloudy
79° 58°
models agree
Fri
Partly cloudy
80° 60°
±8°
Sat
Mostly clear
80° 62°
±10°
Sun
Mostly clear
80° 56°
models agree
Mon
Light drizzle
76° 55°
±5°
Tue
Cloudy
79° 57°
±9°
Wed
Cloudy
83° 58°
models agree
Thu
Partly cloudy
86° 61°
models agree

Thornton, Colorado (CO) is at its warmest in Jul (average highs near 88°F) and coldest in Jan (lows around 13°F), with roughly 19 in of precipitation across the year. Below, compare what NWS, American, European forecast for Thornton 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.

Thornton climate by month

average daytime high and overnight low across a typical year
Jan
34°
13°
Feb
43°
17°
Mar
50°
24°
Apr
62°
34°
May
70°
45°
Jun
81°
55°
Jul
88°
60°
Aug
87°
61°
Sep
83°
53°
Oct
69°
41°
Nov
50°
27°
Dec
47°
25°

Which forecast is most accurate in Thornton?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
American logo
American ★ Best
85
/100rank #1
84±1.6°F91±2.9 mph8290% hitNOAA / NCEP (United States)College Park, Maryland, USA
European logo
European
80
/100rank #2
88±1.2°F89±3.4 mph6581% 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)
Loading ratings…
AmericanNOAA GFS
Loading ratings…
EuropeanECMWF
Loading ratings…

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%37% to 67% chance
Tomorrow±7°72° to 79°±68%32% to 100% chance
Sun±6°69° to 74°±57%35% to 92% chance
Mon±10°69° to 79°±25%10% to 35% chance
Tue±7°75° to 83°±3%24% to 27% 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 Thornton

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

Common questions

What's the weather in Thornton today?
On this page we show what NWS, American, European each forecast for Thornton 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 Thornton today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Thornton 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 Thornton?
Over the last 30 days, the American model has been the most accurate for Thornton (CheckWeather Score 85/100), ahead of the European at 80. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Thornton?
July is typically the warmest month in Thornton, with average highs around 88°F.
How cold does Thornton get?
The coldest month in Thornton is January, when overnight lows average about 13°F.
How much rain does Thornton get?
Thornton sees roughly 19 in of precipitation a year, with May usually the wettest month.

Nearby

More US weather