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Forecast confidence: High · models disagree by 2°F

Rialto weather

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Mostly clear,much the same tomorrow

NWS, the American and the European model agree on a high near 83° in Rialto today. Tomorrow looks mostly clear around 87°, with a 0% chance of rain.

83°60°
87°60°
87°62°
82°65°
84°63°
94°69°
Todaymodels agreeTomorrowmodels agreeSundaysplit ±6°Mondaysplit ±4°Tuesdaymodels agreeWednesdaysplit ±7°
NWSNational Blend (NBM)
83°
Mostly clear
Today 83°·Low 61°·Rain 1%
AmericanNOAA GFS
83°
Partly cloudy
Today 83°·Low 58°·Rain 1%
EuropeanECMWF
85°
Clear
Today 85°·Low 60°·Rain 0%
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Rialto weather alerts and warnings

active National Weather Service watches, warnings and advisories

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Rialto weather in numbers

from 30 years of measured normals

Rialto swings 56°F across the year, from 98°F highs in July to 42°F lows in January, and February is usually the wettest month in a year that brings about 29 in of precipitation.

Warmest month
July
98°F average high
Coldest month
January
42°F average low
Wettest month
February
29 in a year
Below freezing
Never
overnight lows stay above 32°F
Comfortable
4 months
March, April, May and November
Residents
103,000
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The weather map: all three models at once

NWS, American, European side by side around Rialto and nearby towns.Live rain radar →
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Rialto 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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Rialto 10-day forecast, out to 14 days

where the models agree, and where they split
Today
Mostly clear
83° 60°
models agree
Tomorrow
Mostly clear
87° 60°
models agree
Sun
Partly cloudy
87° 62°
±6°
Mon
Partly cloudy
82° 65°
±4°
Tue
Clear
84° 63°
models agree
Wed
Clear
94° 69°
±7°
Thu
Clear
92° 71°
models agree
Fri
Mostly clear
90° 71°
±10°
Sat
Mostly clear
91° 70°
±13°
Sun
Cloudy
94° 73°
±15°
Mon
Mostly clear
94° 75°
±16°
Tue
Mostly clear
96° 78°
models agree
Wed
Clear
87° 70°
±6°
Thu
Clear
81° 66°
±10°

Rialto, California (CA) is at its warmest in Jul (average highs near 98°F) and coldest in Jan (lows around 42°F), with roughly 29 in of precipitation across the year. Below, compare what NWS, American, European forecast for Rialto 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.

Rialto climate by month

average daytime high and overnight low across a typical year
Jan
59°
42°
Feb
59°
42°
Mar
60°
44°
Apr
72°
48°
May
76°
52°
Jun
84°
59°
Jul
98°
70°
Aug
95°
69°
Sep
88°
63°
Oct
84°
58°
Nov
70°
48°
Dec
68°
47°

Which forecast is most accurate in Rialto?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
91
/100rank #1
84±1.6°F96±1.4 mph9597% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
83
/100rank #2
80±2.0°F88±3.8 mph8290% hitNOAA / NCEP (United States)College Park, Maryland, USA

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±2°83° to 85°±1%0% to 1% chance
Tomorrow±3°86° to 89°models agree0% to 0% chance
Sun±6°83° to 89°models agree0% to 0% chance
Mon±4°79° to 84°±5%2% to 7% chance
Tue±2°83° to 86°models agree0% to 0% 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 Rialto

today, local time
Sunrise
06:34
Sunset
18:51
Daylight
12h 17m

Common questions

What's the weather in Rialto today?
On this page we show what NWS, American, European each forecast for Rialto 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 Rialto today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Rialto 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 Rialto?
Over the last 30 days, the European model has been the most accurate for Rialto (CheckWeather Score 91/100), ahead of the American at 83. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Rialto?
July is typically the warmest month in Rialto, with average highs around 98°F.
How cold does Rialto get?
The coldest month in Rialto is January, when overnight lows average about 42°F.
How much rain does Rialto get?
Rialto sees roughly 29 in of precipitation a year, with February usually the wettest month.

Nearby

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