NWS, American, European side by side around San Mateo and nearby towns.Live rain radar →
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Next 14 hours
consensus of the three models
7-day forecast
where the models agree, and where they split
San Mateo, CA is at its warmest in Jul (average highs near 71°F) and coldest in Feb (lows around 45°F), with roughly 29 in of precipitation across the year. Below, compare what NWS, American, European forecast for San Mateo right now, and see exactly where they disagree.
San Mateo climate by month
average daytime high and overnight low across a typical year
Jan
56°
47°
Feb
55°
45°
Mar
56°
47°
Apr
60°
49°
May
64°
52°
Jun
68°
54°
Jul
71°
58°
Aug
70°
59°
Sep
70°
59°
Oct
71°
59°
Nov
61°
53°
Dec
57°
50°
Common questions
What's the weather in San Mateo today?
On this page we show what NWS, American, European each forecast for San Mateo 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 San Mateo today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for San Mateo 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 San Mateo?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the San Mateo 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 San Mateo?
Jul is typically the warmest month in San Mateo, with average highs around 71°F.
How cold does San Mateo get?
The coldest month in San Mateo is Feb, when overnight lows average about 45°F.
How much rain does San Mateo get?
San Mateo sees roughly 29 in of precipitation a year, with Jan 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.