Washington · NWS SEW office

Issaquah, WA weather

It is 45°F at EW6690 Maple Valley as of Oct 27, 10:46 PM PDT. Tonight: Rain, low near 45°F, 98% chance of precipitation. Forecast from the National Weather Service, issued Oct 27, 12:41 PM PDT.

Updated Oct 27, 11:25 PM PDT (snapshot)

Current conditions

Temperature

45°F

Light Rain

Wind

SE 2 mph, gusts 6 mph

Humidity 100%

Pressure · visibility

29.87 inHg

Visibility —

Observed at EW6690 Maple Valley (E6690), Oct 27, 10:46 PM PDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the Issaquah forecast zone right now.

Around the NWS SEW forecast area

No active alerts in zones served by the SEW office near Issaquah.

From the alert snapshot of Oct 28, 2026, 2:15 AM EDT. Washington has 5 active alerts: see them all.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for Issaquah (local time)
TimeTempForecastPrecip. chanceWind
Tue 11 PM46°FLight Rain87%S 10 mph
Wed 12 AM46°FLight Rain86%S 12 mph
Wed 1 AM46°FLight Rain Likely68%S 12 mph
Wed 2 AM46°FChance Light Rain52%S 10 mph
Wed 3 AM46°FChance Light Rain47%S 12 mph
Wed 4 AM46°FChance Light Rain42%S 10 mph
Wed 5 AM46°FLight Rain Likely64%S 10 mph
Wed 6 AM46°FLight Rain Likely60%S 10 mph
Wed 7 AM45°FLight Rain Likely55%SSW 9 mph
Wed 8 AM45°FChance Light Rain50%S 8 mph
Wed 9 AM45°FChance Light Rain49%SSW 8 mph
Wed 10 AM46°FLight Rain Likely55%SSW 9 mph
Wed 11 AM47°FChance Light Rain48%SSW 8 mph
Wed 12 PM49°FChance Light Rain53%SSW 8 mph
Wed 1 PM50°FLight Rain Likely56%SSW 7 mph
Wed 2 PM51°FLight Rain Likely60%SSW 6 mph
Wed 3 PM52°FLight Rain Likely67%SSW 5 mph
Wed 4 PM51°FChance Light Rain54%SSW 5 mph
Wed 5 PM51°FLight Rain Likely59%S 3 mph
Wed 6 PM48°FLight Rain Likely56%S 3 mph
Wed 7 PM45°FChance Light Rain41%S 3 mph
Wed 8 PM44°FChance Light Rain28%SSE 5 mph
Wed 9 PM43°FMostly Cloudy11%SSE 5 mph
Wed 10 PM42°FMostly Cloudy11%SSE 5 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in Issaquah can differ.

7-day forecast

Tonight

Low 45°F

Rain. Cloudy, with a low around 45. South wind around 12 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch possible.

Wednesday

High 53°F·Low 40°F

Rain likely. Mostly cloudy. High near 53, with temperatures falling to around 51 in the afternoon. South southwest wind 3 to 10 mph, with gusts as high as 23 mph. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.

Wednesday Night: Rain likely. Mostly cloudy, with a low around 40. South southeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.

Thursday

High 55°F·Low 40°F

A slight chance of rain before 11am, then patchy fog between 11am and 4pm, then a slight chance of rain. Partly sunny, with a high near 55. East wind 0 to 5 mph. Chance of precipitation is 20%.

Thursday Night: A chance of rain. Mostly cloudy, with a low around 40. East wind around 1 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.

Friday

High 54°F·Low 37°F

A chance of rain before 5pm. Partly sunny, with a high near 54. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.

Friday Night: A slight chance of rain between 11pm and 5am. Mostly cloudy, with a low around 37.

Saturday

High 56°F·Low 39°F

A slight chance of rain after 5pm. Partly sunny, with a high near 56.

Saturday Night: A slight chance of rain before 4am. Mostly cloudy, with a low around 39.

Sunday

High 55°F·Low 38°F

Partly sunny, with a high near 55.

Sunday Night: Partly cloudy, with a low around 38.

Monday

High 59°F·Low 41°F

Mostly sunny, with a high near 59.

Monday Night: Mostly cloudy, with a low around 41.

Tuesday

High 60°F

Partly sunny, with a high near 60.

Nearby cities

Larger cities in the area

Other cities in King County

See every city we cover in Washington, or check all active alerts.

About this forecast

Forecast office
Issaquah is served by the National Weather Service SEW forecast office, forecast zone WAZ314, county zone WAC033.
Location used
The Census Bureau's internal point for Issaquah (47.5445, -122.0491), in King County. Population: 39,664 (2024 estimate), number 32 of the 58 Washington cities on this site.
Radar
Nearest NWS radar: KATX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/47.5445,-122.0491 (forecast issued Oct 27, 12:41 PM PDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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