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Hillsborough weather

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Hillsborough weather alerts and warnings

active National Weather Service watches, warnings and advisories

Checking the National Weather Service for active alerts covering Hillsborough…

Hillsborough weather in numbers

from 30 years of measured normals

Hillsborough swings 32°F across the year, from 74°F highs in October to 42°F lows in February, and January is usually the wettest month in a year that brings about 32 in of precipitation.

Warmest month
October
74°F average high
Coldest month
February
42°F average low
Wettest month
January
32 in a year
Below freezing
Never
overnight lows stay above 32°F
Comfortable
4 months
April, May, June and July
Residents
11,000
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The weather map: all three models at once

NWS, American, European side by side around Hillsborough and nearby towns.Live rain radar →
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Hillsborough 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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Hillsborough 10-day forecast, out to 14 days

where the models agree, and where they split

Hillsborough, California (CA) is at its warmest in Oct (average highs near 74°F) and coldest in Feb (lows around 42°F), with roughly 32 in of precipitation across the year. Below, compare what NWS, American, European forecast for Hillsborough 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.

Hillsborough climate by month

average daytime high and overnight low across a typical year
Jan
56°
45°
Feb
56°
42°
Mar
56°
45°
Apr
60°
46°
May
64°
49°
Jun
67°
51°
Jul
73°
54°
Aug
72°
55°
Sep
72°
55°
Oct
74°
54°
Nov
62°
48°
Dec
58°
47°

Which forecast is most accurate in the US?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
89
/100rank #1
88±1.2°F96±1.2 mph8491% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
73
/100rank #2
82±1.8°F93±2.3 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.

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.

Common questions

What's the weather in Hillsborough today?
On this page we show what NWS, American, European each forecast for Hillsborough 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 Hillsborough today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Hillsborough 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 Hillsborough?
No single model is always right. NWS, American, European each run their own physics, so we line all three up: when they agree the Hillsborough 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 Hillsborough?
October is typically the warmest month in Hillsborough, with average highs around 74°F.
How cold does Hillsborough get?
The coldest month in Hillsborough is February, when overnight lows average about 42°F.
How much rain does Hillsborough get?
Hillsborough sees roughly 32 in of precipitation a year, with January usually the wettest month.

Nearby

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