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Issaquah weather

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The weather map: all three models at once

NWS, American, European side by side around Issaquah and nearby towns.Live rain radar →
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Next 14 hours

consensus of the three models

14-day forecast

where the models agree, and where they split

Issaquah, WA is at its warmest in Jul (average highs near 81°F) and coldest in Feb (lows around 35°F), with roughly 61 in of precipitation across the year. Below, compare what NWS, American, European forecast for Issaquah 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.

Issaquah climate by month

average daytime high and overnight low across a typical year
Jan
47°
36°
Feb
47°
35°
Mar
53°
36°
Apr
56°
40°
May
66°
47°
Jun
70°
51°
Jul
81°
56°
Aug
79°
57°
Sep
70°
53°
Oct
62°
46°
Nov
51°
39°
Dec
51°
39°

Which forecast is most accurate in Issaquah?

CheckWeather Score — graded against the weather that actually happened
ProviderCheckWeather Score🌡 Temp💨 Wind🌧 RainRun by
European logo
European ★ Best
97
/100rank #1
97±0.3°F98±0.6 mph9597% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
87
/100rank #2
86±1.4°F95±1.5 mph8290% 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.

Common questions

What's the weather in Issaquah today?
On this page we show what NWS, American, European each forecast for Issaquah 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 Issaquah today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Issaquah 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 Issaquah?
Over the last 30 days, the European model has been the most accurate for Issaquah (CheckWeather Score 97/100), ahead of the American at 87. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Issaquah?
July is typically the warmest month in Issaquah, with average highs around 81°F.
How cold does Issaquah get?
The coldest month in Issaquah is February, when overnight lows average about 35°F.
How much rain does Issaquah get?
Issaquah sees roughly 61 in of precipitation a year, with December usually the wettest month.

Nearby

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