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CheckWeather USSan Bruno
Forecast confidence: High · models disagree by 1°F

San Bruno weather

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Fog,much the same tomorrow

NWS, the American and the European model agree on a high near 69° in San Bruno today. Tomorrow looks cloudy around 69°, with a 3% chance of rain.

69°57°
69°57°
65°57°
66°59°
70°58°
78°58°
Todaymodels agreeTomorrowmodels agreeSundaymodels agreeMondaymodels agreeTuesdaysplit ±8°Wednesdaysplit ±5°
NWSNational Blend (NBM)
68°
Clear
Feels 70° · Wind 7 mph · Humidity 76%
AmericanNOAA GFS
66°
Mainly clear
Feels 67° · Wind 9 mph · Humidity 75%
EuropeanECMWF
65°
Clear
Feels 67° · Wind 5 mph · Humidity 74%

Latest for San Bruno: NWS (National Blend (NBM)): 68° Clear · American (NOAA GFS): 66° Mainly clear · European (ECMWF): 65° Clear.

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San Bruno weather alerts and warnings

active National Weather Service watches, warnings and advisories

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San Bruno weather in numbers

from 30 years of measured normals

San Bruno swings 27°F across the year, from 71°F highs in October to 44°F lows in February, and January is usually the wettest month in a year that brings about 31 in of precipitation.

Warmest month
October
71°F average high
Coldest month
February
44°F average low
Wettest month
January
31 in a year
Below freezing
Never
overnight lows stay above 32°F
Comfortable
4 months
May, June, July and August
Residents
43,000
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The weather map: all three models at once

NWS, American, European side by side around San Bruno and nearby towns.Live rain radar →
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San Bruno hourly forecast: next 14 hours

consensus of the three models

Rain in the next 24 hours, model by model

each model's own hourly precipitation, side by side

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San Bruno 10-day forecast, out to 14 days

where the models agree, and where they split
Today
Fog
69° 57°
models agree
Tomorrow
Cloudy
69° 57°
models agree
Sun
Cloudy
65° 57°
models agree
Mon
Cloudy
66° 59°
models agree
Tue
Partly cloudy
70° 58°
±8°
Wed
Cloudy
78° 58°
±5°
Thu
Mostly clear
76° 61°
models agree
Fri
Mostly clear
73° 60°
±7°
Sat
Cloudy
71° 60°
±10°
Sun
Mostly clear
70° 59°
±10°
Mon
Cloudy
71° 59°
±6°
Tue
Drizzle
68° 60°
models agree
Wed
Cloudy
67° 58°
±7°
Thu
Clear
68° 57°
models agree

San Bruno, California (CA) is at its warmest in Oct (average highs near 71°F) and coldest in Feb (lows around 44°F), with roughly 31 in of precipitation across the year. Below, compare what NWS, American, European forecast for San Bruno 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.

San Bruno climate by month

average daytime high and overnight low across a typical year
Jan
56°
46°
Feb
55°
44°
Mar
55°
46°
Apr
58°
47°
May
62°
50°
Jun
64°
52°
Jul
69°
54°
Aug
68°
56°
Sep
69°
56°
Oct
71°
55°
Nov
61°
49°
Dec
58°
48°

Which forecast is most accurate in San Bruno?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
93
/100rank #1
91±0.9°F95±1.5 mph9597% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
74
/100rank #2
45±5.5°F90±3.2 mph9597% 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.

What do you think of the forecasts?

your vote counts

The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.

NWSNational Blend (NBM)
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AmericanNOAA GFS
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EuropeanECMWF
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.

Where the models disagree

temperature and rain, judged separately
DayTemperatureRain
Today±1°68° to 69°±3%0% to 3% chance
Tomorrow±3°67° to 70°±3%0% to 3% chance
Sun±4°63° to 67°±1%2% to 3% chance
Mon±3°65° to 68°models agree0% to 0% chance
Tue±8°66° to 75°±1%0% to 1% chance

The 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.

Sunrise and sunset in San Bruno

today, local time
Sunrise
06:54
Sunset
19:12
Daylight
12h 18m

Common questions

What's the weather in San Bruno today?
On this page we show what NWS, American, European each forecast for San Bruno 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 Bruno today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for San Bruno 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 Bruno?
Over the last 30 days, the European model has been the most accurate for San Bruno (CheckWeather Score 93/100), ahead of the American at 74. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in San Bruno?
October is typically the warmest month in San Bruno, with average highs around 71°F.
How cold does San Bruno get?
The coldest month in San Bruno is February, when overnight lows average about 44°F.
How much rain does San Bruno get?
San Bruno sees roughly 31 in of precipitation a year, with January usually the wettest month.

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