Vejret i Hyannis (Cape Cod) i september
Hyannis i september: behageligt, regnfuldt, med ren luft — et rigtig godt tidspunkt at tage afsted.
Opdateret september 2026 · klimanormaler fra ERA5-reanalysen
Nr. 4 af 12 måneder i Hyannis · Nr. 760 af 1413 rejsemål at besøge i september · komfort 78/100 (niveau B)
- Dage
- 23°C
- Nætter
- 14°C
- Våde dage
- 8
- Sol
- 8.6 h
- Luftfugtighed
- 80%
- Dagslys
- 13 h
Noter fra rejsende om Hyannis i september
Noter fra Nantucket i nærheden (44 km væk)
Hyannis har ikke sine egne noter for september endnu — disse handler om Nantucket, tæt nok på til at dele sæsonen.
September is the month this board recommends over the summer it follows: the crowds thin out, the bike paths empty, and everything is still open. On the water they say it has finally warmed up - our column reads that slightly differently, 19.8C against 19.9C in July and August, so the sea holds its peak while the air steps down to 22.2C days and 15.2C nights. The same swimming with fewer people in it. One thing to plan around: they call September fairly clear and our rain column disagrees, 105.9mm against August's 48.6mm, across only 6.3 days - few storms but large ones, which is what hurricane season does to this coast. The record: humidity 84 percent, a 30.5 kph wind, 8.9 hours of sun and AQI 48.
Andre måneder i Hyannis
Cape Cod's own forum doesn't sugarcoat February: expect a real chance of high wind, biting cold and snow, and New England weather here is notoriously hard to predict from one day to the next. Multiple posters recommended layering with fleece under a windproof shell so you can still get outside comfortably. A good number of shops and restaurants that cater to the summer crowd simply close for the season, so plan meals ahead rather than expecting to wander and find something open. It's a legitimate visit for solitude and off-season prices, just not the postcard version of the Cape.
Forum posters describe August as typically the warmest month, often in the 80s-90sF and humid, though the Cape's ocean breezes keep it noticeably cooler than inland Massachusetts at the same time - a stretch of 90F+ days is possible, but so is a cooler, rawer spell within the same month. Posters call August rain genuinely unpredictable, ranging from a light sprinkle to a full washed-out day, though it's typically the lowest-rain month of the summer overall. Mosquitoes are a real, near-constant presence, especially in the evenings, with repellent treated as standard packing. Posters consistently name the last two weeks of August through September as the more reliably pleasant stretch compared to June or early August.
Tilføj din egen note fra Hyannis på kortet.
Klimanormaler for Hyannis — september
Månedsgennemsnit fra ERA5-reanalysen. AQI er det gennemsnitlige amerikanske luftkvalitetsindeks for måneden.
Travlhed i Hyannis i september
Hvor travlt der er på selve stedet — skoleferier og masseferier, de måneder en redaktør har markeret, og hvor eftertragtet vejret gør dem. Aldrig en del af komfortscoren.
TætpakketIsland ferry high season, Labor Day weekend, Summer break i United States(anslået)
TætpakketTravltSkuldersæsonStille
Bedste måneder for vejret i Hyannis
Rangeret efter dette rejsemåls egen klimakomfortscore året igennem — noget andet end, hvor travlt der bliver (se Travlhed ovenfor).
Pænt vejrVejret i Hyannis topper juni–august, bedst omkring juli.
Bedste vejrPænt vejrHårdeste vejr
Det sker i Hyannis i september
Tilbagevendende sæsonbegivenheder, naturfænomener, lukninger og helligdage — kurateret og med kilder.
- Åbning
Island ferry high season
20. maj – 15. okt. · normaltSommersæsonen åbnerTætpakketBook tidligtHyannis is the mainland end of the Nantucket boats, and the summer timetable adds fast ferries and extra sailings from late May. Car spaces on the traditional boat are released months ahead and go the day they open. Kilde ↗
- Natur
White shark season
1. jun. – 31. okt. · normaltDyrelivssæsonRisikoWhite sharks follow the grey seals into Cape waters from early summer and are gone by late autumn, with the tagged detections peaking in August and September. It is the ocean side that closes for sightings, not the calmer Nantucket Sound beaches in town. Kilde ↗
- Risiko
Hurricane season
15. aug. – 31. okt. · normaltLukningerNew England catches the tail of Atlantic systems in late summer and autumn, and even a passing storm cancels the island ferries and takes the power out for a day or two. Direct hits are rare; disrupted travel is not. Kilde ↗
- Helligdag
Labor Day weekend
5.–7. sep.National helligdagTætpakketBook tidligtLabor Day, the first Monday of September, is the last big getaway of summer: the long weekend books out campsites and lodging and fills parking early, and families thin out quickly once it has passed. Kilde ↗
Lige i nærheden sker der noget
Inden for 300 km fra Hyannis — en dagstur eller et kort hop — hvor der sker noget denne måned. Aldrig en del af komfortscoren.
Hvor ligger Hyannis?
Hyannis i september — ofte stillede spørgsmål
- Er september et godt tidspunkt at besøge Hyannis?
- Hyannis i september: behageligt, regnfuldt, med ren luft — et rigtig godt tidspunkt at tage afsted. Måneden ligger nr. 4 ud af 12 for Hyannis på SeasonMaps komfortscore (78/100).
- Hvordan er vejret i Hyannis i september?
- I september har Hyannis i gennemsnit en dagtemperatur på 22.8 °C og en nattemperatur på 14.3 °C, med omkring 113.4 mm regn fordelt på cirka 7.8 regnvejrsdage.
- Hvordan er luftkvaliteten i Hyannis i september?
- Hyannis har et gennemsnitligt amerikansk luftkvalitetsindeks på omkring 43 i september.
Inden for 300 km: Boston's Whales on Stellwagen Bank, omkring 15. apr. – 20. okt. og Nantucket's Sea warm enough to swim, omkring 15. jul. – 20. sep..