Wetter in Seattle im August
August in Seattle: warm, trocken, mit sauberer Luft – einer der besten Reisemonate.
Aktualisiert: September 2026 · Klimanormalwerte aus der ERA5-Reanalyse
Platz 2 von 12 Monaten in Seattle · Platz 22 von 1413 Reisezielen im August · Komfort 95/100 (Stufe S)
- Tagsüber
- 25°C
- Nachts
- 15°C
- Regentage
- 2
- Sonne
- 11.4 h
- Luftfeuchte
- 67%
- Tageslicht
- 14 h

Notizen von Reisenden zu Seattle im August
Seattle-forum threads on August are almost giddy about the weather - this and the two months around it are the reliably dry, sunny stretch of the year, with posters calling a soggy day genuinely rare and temperatures running warm without the humidity that makes other cities miserable in summer. The one recurring caveat has nothing to do with rainfall: more than one thread flags wildfire smoke as the real risk, a haze that can roll in and ruin an otherwise perfect week with no warning. Cruise-ship crowds pack Pike Place Market and the Space Needle on port days. The record backs the dry read completely: 25.2C days, 14.7C nights, just 12mm total across 1.6 days, 11.4 hours of sun and an AQI of 44 - though that AQI can spike hard on a bad smoke day, which the average doesn't show.
Andere Monate in Seattle
Regulars describe this as the most variable month of the year here, unlike the more settled fall and winter, with two genuinely distinct outcomes possible on any given day - sunny and into the low 70s Fahrenheit, or overcast with highs stuck in the upper 50s to low 60s. Our row backs the mild, changeable average across that range, 19.1C over 9.5C nights, with 34mm of rain across 5.3 days. Regulars are consistent this is still a genuinely good time to visit, flowers in full bloom and springlike energy throughout the city, with layering the standard advice given how unpredictable a specific day can turn out. The record: humidity 74 percent, 10.8 hours of sun, a 12.6 kph wind and AQI 44.
Regulars call this one of the city's best-looking months on paper, and are specific about why: the rains that define this region typically hold off until mid-October, and the first week of the month is often the driest and warmest stretch, with the back half cooling off a little as it goes. Our row backs the shift, 21.4C over 12.3C nights, with 35.5mm of rain across 5.6 days - a real total, but light next to what regulars describe arriving a month later. Evenings call for a light jacket or sweatshirt once the sun goes down. The one caveat some years bring is wildfire smoke drifting in from regional fires, not present every September but enough that regulars mention checking air quality before a trip built around outdoor views. The record: 9.5 hours of sun, a 12.3 kph wind and AQI 40.
Juneuary is the local word for the version of this month that feels like January, and the local claim is that summer does not start until the 5th of July - the same joke the Portland board tells, two hundred kilometres south. The instruction that follows is precise: the 30th of June is a different month from the 1st, so come at the end. Our row is kinder than the nickname. Rain is 29.5mm across 5.1 days, and there are 11.6 hours of sun inside 15.9 of daylight, so the grey is brief showers between sun breaks rather than a ceiling. What June lacks is warmth - 21.6C by day, 12C at night. The record: humidity 71 percent, a 12.5 kph wind and AQI 39.
Seattle forum threads describe February as genuinely mixed - some stretches bring drizzly, overcast, grey days typical of the region's wet season (which runs roughly mid-October through April), while other years bring a welcome week or so of milder, lighter-sun weather that winter-weary locals specifically look forward to. Snow chances were described as relatively low by this point in winter, with January and early February the more likely window for any accumulation. One consistent tip from posters familiar with the wider region: the northern Olympic Peninsula tends to run drier and sunnier than Seattle proper in February, a worthwhile alternative for anyone chasing better odds of sun.
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Klimanormalwerte Seattle – August
Monatliche Durchschnittswerte aus der ERA5-Reanalyse. Der AQI ist der mittlere US-Luftqualitätsindex des Monats.
Andrang in Seattle im August
Wie voll der Ort selbst ist – Schul- und Massenferien, die Monate, die die Redaktion markiert hat, und wie begehrt das Wetter sie macht. Fließt nie in den Komfort-Score ein.
HochbetriebMount Rainier wildflowers, Seafair, Summer break in Vereinigte Staaten(geschätzt)
HochbetriebViel losZwischensaisonRuhig
Die besten Monate fürs Wetter in Seattle
Gerankt nach dem Klimakomfort-Score dieses Reiseziels übers Jahr – etwas anderes als der Andrang (siehe Andrang oben).
Bestes WetterDie beste Wetterphase in Seattle reicht von Juni bis August, am schönsten ist es um den Juli.
Im August dabei: Salmon at the Ballard Locks.
Bestes WetterOrdentliches WetterSchwierigstes Wetter
Was ist los in Seattle im August
Wiederkehrende saisonale Events, Naturschauspiele, Schließungen und Feiertage – kuratiert und mit Quelle.
- Natur
Salmon at the Ballard Locks
15. Juni – 20. Sep. · meistTiersaisonSockeye run through the fish ladder in early summer, chinook and coho into September, and the viewing windows below the locks are free and busy. Numbers vary wildly year to year. Quelle ↗
- Saison
The dry months
5. Juli – 15. Sep. · meistTrockenzeitThe rain effectively stops after the Fourth of July and holds off until well into September. Everything outdoors in this city is scheduled around those ten weeks.
- Natur
Mount Rainier wildflowers
15. Juli – 20. Aug. · meistWildblumen & BlüteVollParadise and Sunrise flower for about a month once the snowpack finally clears, usually from mid-July. Timed entry applies to the park in summer and the meadows are strictly stay-on-the-path.
- Festival
Seafair
28. Juli – 9. Aug. · meistMotorsport-WochenendeVollSchließungenHydroplane racing on Lake Washington and the Blue Angels overhead on the first weekend of August. The I-90 bridge closes for the air show and the whole east side plans around it. Quelle ↗
- Risiko
Wildfire smoke
1. Aug. – 20. Sep. · meistRauchsaisonLate summer smoke from fires in eastern Washington, Oregon or British Columbia settles into the basin and can hold for days. It is the one thing that spoils the best weather of the year here. Quelle ↗
In der Nähe ist was los
Im Umkreis von 300 km um Seattle – ein Tagesausflug oder ein kurzer Abstecher – mit etwas, das diesen Monat los ist. Fließt nie in den Komfort-Score ein.
Wo liegt Seattle?
Seattle im August – häufige Fragen
- Ist der August eine gute Reisezeit für Seattle?
- August in Seattle: warm, trocken, mit sauberer Luft – einer der besten Reisemonate. Beim Komfort-Score von SeasonMap liegt der Monat für Seattle auf Platz 2 von 12 (95/100).
- Wie ist das Wetter in Seattle im August?
- Im August liegen die Tageshöchstwerte in Seattle im Schnitt bei 25.2°C und die Tiefstwerte bei 14.7°C, mit rund 11.5 mm Regen an etwa 1.6 Regentagen.
- Wie ist die Luftqualität in Seattle im August?
- Seattle hat im August einen mittleren US-Luftqualitätsindex (AQI) von etwa 44.
Im Umkreis von 300 km: Olympic National Park: Subalpine wildflowers, etwa 20. Juni – 10. Aug. und Victoria, BC: Whale watching season, etwa 1. Mai – 15. Okt..