Grand Terrace weather
Loading live data…Latest for Grand Terrace: NWS (National Blend (NBM)): 84° Clear · American (NOAA GFS): 87° Clear · European (ECMWF): 90° Clear.
The weather map: all three models at once
NWS, American, European side by side around Grand Terrace and nearby towns.Live rain radar →Next 14 hours
consensus of the three models7-day forecast
where the models agree, and where they splitGrand Terrace is a small town of about 12,000 people in CA, sitting at 34.0°N in a subtropical climate zone. NWS, American, European each forecast Grand Terrace with their own physics, so we line all three up and flag where they disagree. Nearby towns include Colton, Loma Linda, San Bernardino.
Which forecast is most accurate in the US?
CheckWeather Score — graded against the weather that actually happened
The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 40 cities. Lower error means a higher score. The apps you know (AccuWeather, Apple Weather, The Weather Channel) are built on these models.
Common questions
What's the weather in Grand Terrace today?
Will it rain in Grand Terrace today or tomorrow?
Which forecast is most accurate for Grand Terrace?
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.