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CheckWeather USGrand Terrace

Grand Terrace weather

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The weather map: all three models at once

NWS, American, European side by side around Grand Terrace and nearby towns.Live rain radar →
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Next 14 hours

consensus of the three models

14-day forecast

where the models agree, and where they split

Grand Terrace, CA is at its warmest in Jul (average highs near 99°F) and coldest in Jan (lows around 42°F), with roughly 23 in of precipitation across the year. Below, compare what NWS, American, European forecast for Grand Terrace 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.

Grand Terrace climate by month

average daytime high and overnight low across a typical year
Jan
61°
42°
Feb
61°
42°
Mar
62°
45°
Apr
74°
48°
May
78°
53°
Jun
86°
59°
Jul
99°
67°
Aug
96°
67°
Sep
90°
62°
Oct
86°
57°
Nov
73°
47°
Dec
70°
45°

Which forecast is most accurate in the US?

CheckWeather Score — graded against the weather that actually happened
ProviderCheckWeather Score🌡 Temp💨 Wind🌧 RainRun by
European logo
European ★ Best
89
/100rank #1
87±1.3°F96±1.2 mph8592% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
73
/100rank #2
81±1.9°F93±2.2 mph4972% 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.

Common questions

What's the weather in Grand Terrace today?
On this page we show what NWS, American, European each forecast for Grand Terrace 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 Grand Terrace today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Grand Terrace 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 Grand Terrace?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the Grand Terrace forecast is reliable, and when they split you should expect surprises. See our tested US accuracy scoreboard for how the models compare.
What is the warmest month in Grand Terrace?
July is typically the warmest month in Grand Terrace, with average highs around 99°F.
How cold does Grand Terrace get?
The coldest month in Grand Terrace is January, when overnight lows average about 42°F.
How much rain does Grand Terrace get?
Grand Terrace sees roughly 23 in of precipitation a year, with February usually the wettest month.

Nearby

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