Issaquah, WA 98029 Monthly Weather

King County10:23 AM PDT47.56°N, 122.01°W
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October 2026

Sun
Mon
Tue
Wed
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Sat
168°/48°Avg 64°/45°
271°/48°Avg 63°/44°
372°/49°Avg 63°/44°
470°/51°Avg 62°/44°
572°/50°Avg 62°/44°
663°/50°Avg 61°/43°
763°/52°Avg 61°/43°
871°/40°Avg 61°/43°
971°/39°0.60 inAvg 60°/43°
1058°/43°0.50 inAvg 60°/42°
1161°/42°Avg 59°/42°
1262°/37°Avg 59°/42°
1364°/43°0.03 inAvg 59°/42°
1468°/51°Avg 58°/42°
1569°/47°Avg 58°/41°
1680°/41°Avg 58°/41°
1762°/50°0.38 inAvg 57°/41°
1858°/36°<0.01 inAvg 57°/41°
1965°/45°Avg 56°/40°
2062°/41°Avg 56°/40°
21Avg 56°/40°
22 Mostly Sunny 59°/42°Avg 55°/40°
23 Partly Sunny 56°/37°Avg 55°/40°
24 Partly Sunny then Slight Chance Light Rain 56°/41°Avg 55°/39°
25 Chance Light Rain 59°/42°Avg 54°/39°
26 Slight Chance Light Rain 60°/41°Avg 54°/39°
27 Slight Chance Light Rain 59°/40°Avg 54°/39°
28 Partly Sunny 58°/40°Avg 53°/39°
29 Partly cloudy 63°/38°Avg 53°/38°
30 Mostly sunny 61°/38°Avg 53°/38°
31Avg 53°/38°
Average high67° (normal 60°)
Average low45° (normal 42°)
Warmest / coldest80° / 36°
Precipitation1.52 in (normal 2.88 in to date)
Record high today82° (1937)
Record low today29° (1984)

Observed: Monroe, 32 km away, records since 1929. Normals 1991–2020. Climate data from NOAA's Regional Climate Centers (ACIS); recent days are preliminary. Days ahead: the forecast.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.