Wetter in Big Sky im September
September in Big Sky: angenehm, etwas Regen, mit sauberer Luft – nicht die beste Reisezeit.
Aktualisiert: September 2026 · Klimanormalwerte aus der ERA5-Reanalyse
Platz 9 von 12 Monaten in Big Sky · Platz 1362 von 1413 Reisezielen im September · Komfort 23/100 (Stufe F)
- Tagsüber
- 19°C
- Nachts
- 7°C
- Regentage
- 10
- Sonne
- 10.3 h
- Luftfeuchte
- 60%
- Tageslicht
- 13 h

Notizen von Reisenden zu Big Sky im September
Big Sky-forum threads on September conditions describe a genuinely pleasant pattern, cold mornings giving way to sunny, comfortably warm afternoons, aspen groves beginning their color change and crowds noticeably thinner than peak summer. Posters are direct this doesn't rule out an early accumulation at higher elevation, entirely possible even while the valley floor stays green and mild, a real reminder of how much conditions vary by altitude. Regulars name hiking, mountain biking, fly fishing and horseback riding all still genuinely strong September activities, the cooler air a real relief after the intensity of midsummer. Layers are standing advice regardless of how warm the afternoon runs, given how sharply temperatures drop once the sun goes down. Posters call September a real sweet spot for anyone prioritizing scenery and quiet over guaranteed warm weather. The record: 19.4C days feeling like 18C, 7.2C nights, a notably high 9cm of fresh accumulation and 60 percent humidity.
Andere Monate in Big Sky
Big Sky-forum threads on an April visit describe closing as genuinely landing around the tenth or eleventh of the month, posters naming this timing as often falling near Easter. Regulars call steady late-season snowfall genuinely still standard, several posters naming warmer, longer days alongside notably thinner crowds as real advantages of visiting this late. Posters call the resort genuinely feeling local by April, several regulars naming this a real contrast to the busier winter peak. Regulars call spring corn snow genuinely some of the best value and conditions of the entire season, several threads naming this a real reason not to overlook April. Posters recommend Closing Weekend specifically if timing allows, several regulars calling this a real notable on-mountain event worth planning a trip around. The record: 6.6C days, -3.3C nights, 79.9mm across nearly 15 days and 72 percent humidity.
Big Sky-forum threads on a late May visit describe this as shoulder season, posters using it as a base for Yellowstone while asking whether local businesses would be open given the timing. Regulars call biking, horseback riding and rafting on the Gallatin River all real May options once conditions allow, several posters recommending these over anything snow-dependent this late in spring. Posters recommend checking the Big Sky and Bozeman Chamber event calendars directly, several regulars calling this the best way to confirm what's actually running during shoulder weeks. Regulars call lodging genuinely varied this time of year, ski-in options and condo complexes both mentioned as available even outside peak season. Posters recommend real flexibility around exact May plans, some businesses here still on reduced or seasonal schedules this early. The record: 11.8C days feeling like 10C, 1.2C nights, an extraordinarily high 93.8mm across over 16 days and 61 percent humidity.
Big Sky-forum threads on a July visit describe this as genuinely peak season, posters recommending the chairlift or gondola up the mountain for anyone wanting the views without a full hike. Regulars call Beehive Basin the standout hike close to town, Ousel Falls named the easier first outing for anyone easing into the altitude. Posters recommend a ranch experience or horseback outing as a genuine change of pace from the trail-heavy itinerary most visitors default to. Regulars call late July the calendar's busiest stretch, Music in the Meadows, the farmers market and the PBR Rodeo all real draws worth timing a trip around. Posters recommend real bear spray for hikes further from town like Upper Beehive, wildlife encounters here a genuine possibility. Regulars call the daytime warmth genuinely comfortable, evenings still cool enough for a real layer once the sun drops. The record: 25.7C days feeling like 25C, 12C nights, 38.4mm across over 10 days and 53 percent humidity.
Big Sky-forum threads on March skiing are consistently enthusiastic, posters calling snow conditions rarely a problem this time of year and early March frequently named among the best stretches of the entire season. Regulars describe peak snowpack as typically landing around the first week of March, conditions often surpassing January simply because more has accumulated by then. Posters call the freeze-thaw cycle that defines classic spring skiing as not yet fully underway in March, a real advantage over April. Regulars recommend early-to-mid March as the more dependable target, temperatures generally sitting comfortably in the twenties and thirties Fahrenheit. Posters describe days as noticeably longer and milder than deep winter without sacrificing snow quality. Regulars recommend checking conditions before an April trip. The record: 3.1C days feeling like -1C, -6.3C nights, a notably high 47.1cm of fresh accumulation and 74 percent humidity.
Schreib deine eigene Notiz – direkt auf der Karte, bei Big Sky.
Klimanormalwerte Big Sky – September
Monatliche Durchschnittswerte aus der ERA5-Reanalyse. Der AQI ist der mittlere US-Luftqualitätsindex des Monats.
Andrang in Big Sky im September
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.
Viel losSummer break in Vereinigte Staaten(geschätzt)
HochbetriebViel losZwischensaisonRuhig
Die besten Monate fürs Wetter in Big Sky
Gerankt nach dem Klimakomfort-Score dieses Reiseziels übers Jahr – etwas anderes als der Andrang (siehe Andrang oben).
Ordentliches WetterDie beste Wetterphase in Big Sky reicht von Dezember bis Februar.
Bestes WetterOrdentliches WetterSchwierigstes Wetter
Was ist los in Big Sky im September
Wiederkehrende saisonale Events, Naturschauspiele, Schließungen und Feiertage – kuratiert und mit Quelle.
- Eröffnung
Yellowstone roads open
15. Apr. – 5. Nov. · meistWandersaisonSchließungenThe interior roads out of West Yellowstone are ploughed open in stages from mid-April and close again to cars in early November, after which it is snowcoach or nothing. Big Sky is an hour from that gate. Quelle ↗
- Festival
Music in the Mountains
1. Juni – 10. Sep. · meistMusikfestivalFree Thursday-evening concerts in Town Center park from early June to the start of September. Bring a blanket and something warm; the temperature drops the moment the sun goes behind Lone Peak. Quelle ↗
- Risiko
Wildfire smoke season
15. Juli – 30. Sep. · meistMost Augusts bring some smoke into the Gallatin Canyon from fires in Montana, Idaho and further west. The county issues air quality alerts, Lone Peak goes hazy, and hard hikes and lift-served biking are best moved to clear days. Quelle ↗
In der Nähe ist was los
Im Umkreis von 300 km um Big Sky – ein Tagesausflug oder ein kurzer Abstecher – mit etwas, das diesen Monat los ist. Fließt nie in den Komfort-Score ein.
Wo liegt Big Sky?
Big Sky im September – häufige Fragen
- Ist der September eine gute Reisezeit für Big Sky?
- September in Big Sky: angenehm, etwas Regen, mit sauberer Luft – nicht die beste Reisezeit. Beim Komfort-Score von SeasonMap liegt der Monat für Big Sky auf Platz 9 von 12 (23/100).
- Wie ist das Wetter in Big Sky im September?
- Im September liegen die Tageshöchstwerte in Big Sky im Schnitt bei 19.4°C und die Tiefstwerte bei 7.2°C, mit rund 62.9 mm Regen an etwa 9.7 Regentagen.
- Wie ist die Luftqualität in Big Sky im September?
- Big Sky hat im September einen mittleren US-Luftqualitätsindex (AQI) von etwa 39.
- Schneit es in Big Sky im September?
- In Big Sky fallen im September rund 9 cm Schnee.
Im Umkreis von 300 km: Bozeman: Golden eagle migration, etwa 15. Sep. – 31. Okt. und Yellowstone National Park: Beartooth Highway open, etwa 22. Mai – 12. Okt..