CheckWeather US›Diamond Bar
Diamond Bar weather
Loading live data…NWSNational Blend (NBM)
68°
Clear
Feels 72° · Wind 1 mph · Humidity 82%
AmericanNOAA GFS
67°
Clear
Feels 70° · Wind 3 mph · Humidity 81%
EuropeanECMWF
68°
Clear
Feels 72° · Wind 3 mph · Humidity 88%
Latest for Diamond Bar: NWS (National Blend (NBM)): 68° Clear · American (NOAA GFS): 67° Clear · European (ECMWF): 68° Clear.
The weather map: all three models at once
NWS, American, European side by side around Diamond Bar and nearby towns.Live rain radar →Loading the three model maps…
Next 14 hours
consensus of the three models7-day forecast
where the models agree, and where they splitDiamond Bar is a town of about 57,000 people in CA, sitting at 34.0°N in a subtropical climate zone. NWS, American, European each forecast Diamond Bar with their own physics, so we line all three up and flag where they disagree. Nearby towns include Walnut, Pomona, Chino Hills.
Common questions
What's the weather in Diamond Bar today?
On this page we show what NWS, American, European each forecast for Diamond Bar 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 Diamond Bar today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Diamond Bar 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 Diamond Bar?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the Diamond Bar forecast is reliable, and when they split you should expect surprises. See our tested US accuracy scoreboard for how the models compare.
The forecasts Americans check
The two biggest apps keep their model a secret, so we can't show their numbers, only link you to them. The National Weather Service is public, so its data sits right in the comparison above.