Weather in San Jose tomorrow
Tomorrow's forecast for San Jose, CA from every major model, so you can see whether they agree before you plan around it.
Tomorrow
Tomorrow in this area the models centre on about 89°. Model agreement is low — treat any single number with suspicion.
Tomorrow
2026-07-31 — every model, side by sideNWSNational Blend (NBM)
88°
Clear
AmericanNOAA GFS
85°
Clear
EuropeanECMWF
93°
Clear
The models are 8° apart on this day. That is genuine uncertainty — any app showing you a single confident number is hiding it.
Where the models disagree
temperature and rain, judged separatelyThe 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.
Common questions
Will it rain tomorrow?
None of the models are showing a high chance of rain tomorrow, and they broadly agree, so the dry forecast is reasonably safe to plan around.
How accurate is a one-day forecast?
A one-day-ahead forecast is the most reliable one you will get — in our own testing, temperature error at 24 hours is well under half what it is at seven days. That is why tomorrow's forecast is worth trusting when the models agree, and worth questioning when they do not.