Cuaca Seattle di September
September di Seattle: nyaman, sedikit hujan, dengan udara bersih — waktu yang luar biasa untuk berkunjung.
Diperbarui September 2026 · normal iklim dari reanalisis ERA5
#4 dari 12 bulan di Seattle · #293 dari 1413 destinasi untuk dikunjungi di September · kenyamanan 89/100 (tier A)
- Siang
- 21°C
- Malam
- 12°C
- Hari hujan
- 6
- Matahari
- 9.5 h
- Kelembapan
- 75%
- Jam siang
- 13 h

Catatan pelancong tentang Seattle di September
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.
Bulan lain di 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.
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 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.
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.
Catatan sepanjang tahun ada di ringkasan Seattle. Tambahkan catatan Anda dari kartu Seattle di peta.
Normal iklim Seattle — September
Rata-rata bulanan dari reanalisis ERA5. AQI adalah rata-rata Indeks Kualitas Udara AS untuk bulan itu.
Keramaian di Seattle pada September
Seberapa ramai tempatnya sendiri — libur sekolah dan libur massal, bulan-bulan yang ditandai editor, dan seberapa diburu tempat itu karena cuacanya. Tidak pernah menjadi bagian dari skor kenyamanan.
Puncak keramaianBumbershoot, Summer break di Amerika Serikat(perkiraan)
Puncak keramaianRamaiMusim peralihanSepi
Bulan terbaik untuk cuaca Seattle
Diurutkan berdasarkan skor kenyamanan iklim destinasi ini sepanjang tahun — hal yang berbeda dari seberapa ramai tempatnya (lihat Keramaian di atas).
Cuaca lumayanCuaca Seattle memuncak Juni–Agustus, terbaik sekitar Juli.
Cuaca terbaikCuaca lumayanCuaca tersulit
Agenda di Seattle pada September
Acara musiman berulang, fenomena alam, penutupan, dan hari libur — dikurasi dan bersumber jelas.
- Alam
Salmon at the Ballard Locks
15 Jun – 20 Sep · biasanyaMusim satwa liarSockeye 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. Sumber ↗
- Musim
The dry months
5 Jul – 15 Sep · biasanyaMusim kemarauThe 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.
- Bahaya
Wildfire smoke
1 Agu – 20 Sep · biasanyaMusim asapLate 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. Sumber ↗
- Festival
Bumbershoot
5–6 SepFestival musikRamaiThe city's Labor Day weekend arts and music festival at Seattle Center, rebuilt smaller and stranger than its stadium-era self. It closes the summer the way Folklife opens it. Sumber ↗
Di dekatnya, dan ada acara
Dalam radius 300 km dari Seattle — perjalanan sehari atau lompatan singkat — dengan sesuatu yang berlangsung bulan ini. Tidak pernah masuk ke skor kenyamanan.
Di mana Seattle?
Seattle di September — FAQ
- Apakah September waktu yang tepat untuk mengunjungi Seattle?
- September di Seattle: nyaman, sedikit hujan, dengan udara bersih — waktu yang luar biasa untuk berkunjung. Bulan ini ada di peringkat #4 dari 12 bulan untuk Seattle menurut skor kenyamanan SeasonMap (89/100).
- Bagaimana cuaca di Seattle pada September?
- Pada September, Seattle rata-rata mencapai suhu tertinggi harian 21.4°C dan terendah 12.3°C, dengan sekitar 35.5 mm hujan sepanjang kurang lebih 5.6 hari hujan.
- Bagaimana kualitas udara di Seattle pada September?
- Seattle punya rata-rata Indeks Kualitas Udara AS sekitar 40 pada September.
Dalam radius 300 km: High country opens di Olympic National Park, sekitar 1 Jul – 10 Okt, dan Whale watching season di Victoria, BC, sekitar 1 Mei – 15 Okt.