NWS, American, European side by side around Rancho Cucamonga and nearby towns.Live rain radar →
Loading the three model maps…
Next 14 hours
consensus of the three models
7-day forecast
where the models agree, and where they split
Rancho Cucamonga, CA is at its warmest in Jul (average highs near 95°F) and coldest in Feb (lows around 42°F), with roughly 30 in of precipitation across the year. Below, compare what NWS, American, European forecast for Rancho Cucamonga right now, and see exactly where they disagree.
Rancho Cucamonga climate by month
average daytime high and overnight low across a typical year
Jan
59°
43°
Feb
59°
42°
Mar
60°
45°
Apr
71°
48°
May
75°
52°
Jun
82°
57°
Jul
95°
65°
Aug
93°
66°
Sep
87°
63°
Oct
84°
59°
Nov
71°
49°
Dec
67°
48°
Common questions
What's the weather in Rancho Cucamonga today?
On this page we show what NWS, American, European each forecast for Rancho Cucamonga 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 Rancho Cucamonga today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Rancho Cucamonga 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 Rancho Cucamonga?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the Rancho Cucamonga 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 Rancho Cucamonga?
Jul is typically the warmest month in Rancho Cucamonga, with average highs around 95°F.
How cold does Rancho Cucamonga get?
The coldest month in Rancho Cucamonga is Feb, when overnight lows average about 42°F.
How much rain does Rancho Cucamonga get?
Rancho Cucamonga sees roughly 30 in of precipitation a year, with Feb usually the wettest month.
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.