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San Martin weather

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San Martin weather alerts and warnings

active National Weather Service watches, warnings and advisories

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San Martin weather in numbers

from 30 years of measured normals

San Martin swings 50°F across the year, from 90°F highs in July to 40°F lows in December, and January is usually the wettest month in a year that brings about 17 in of precipitation.

Warmest month
July
90°F average high
Coldest month
December
40°F average low
Wettest month
January
17 in a year
Below freezing
Never
overnight lows stay above 32°F
Comfortable
4 months
February, March, April and May
Residents
7,027
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The weather map: all three models at once

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

where the models agree, and where they split

San Martin, California (CA) is at its warmest in Jul (average highs near 90°F) and coldest in Dec (lows around 40°F), with roughly 17 in of precipitation across the year. Below, compare what NWS, American, European forecast for San Martin 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 Martin climate by month

average daytime high and overnight low across a typical year (1991-2020)
Jan
57°
42°
Feb
60°
41°
Mar
62°
45°
Apr
69°
47°
May
73°
51°
Jun
80°
54°
Jul
90°
58°
Aug
88°
58°
Sep
84°
59°
Oct
79°
52°
Nov
66°
44°
Dec
60°
40°

Source: 1991-2020 averages, ERA5 for this place adjusted with NASA POWER.

How the weather around San Martin has changed since 1995

San Martin sits in the same roughly 50 km square of NASA's reanalysis as Santa Cruz. That square ran 1.0°F warmer in 2015-2024 than in 1995-2004. See the full 30-year picture on the Santa Cruz page.

Which forecast is most accurate in the US?

CheckWeather Score, graded against the weather that actually happened
ProviderCheckWeather-scoreTempWindRainRun by
European logo
European ★ Best
93
/100rank #1
91±0.9°F97±1.1 mph9396% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
82
/100rank #2
83±1.7°F94±2.0 mph7184% 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 San Martin today?
On this page we show what NWS, American, European each forecast for San Martin 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 Martin today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for San Martin 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 Martin?
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 Martin 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 Martin?
July is typically the warmest month in San Martin, with average highs around 90°F.
How cold does San Martin get?
The coldest month in San Martin is December, when overnight lows average about 40°F.
How much rain does San Martin get?
San Martin sees roughly 17 in of precipitation a year, with January usually the wettest month.

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