Killington weather in September

September in Killington: cool, rainy, with clean air — not the best time to visit.

Updated September 2026 · climate normals from ERA5 reanalysis

Killington🇺🇸 United States · Great Lakes & Midwest · Ski21
  1. 80Jan
  2. 87Feb
  3. 92Mar
  4. 65Apr
  5. 32May
  6. 17Jun
  7. 12Jul
  8. 14Aug
  9. 21Sep
  10. 43Oct
  11. 75Nov
  12. 83Dec

#9 of 12 months in Killington · #1372 of 1413 destinations to visit in September · comfort 21/100 (tier F)

Days
16°C
Nights
6°C
Wet days
9
Sun
9.2 h
Humidity
76%
Daylight
13 h
Killington, United States
Photo: The original uploader was Redjar at English Wiki · CC BY-SA 3.0

Traveller notes on Killington in September

Vermont forum threads describe late-September conditions around Killington as running on the warmer side in recent years, with the standard advice being to pack in layers - rain gear and a fleece for cool mornings and evenings, plus a hat and gloves if riding the gondola up to the summit where it's noticeably colder. Fall foliage timing varies by year, but posters noted color can start showing by the very end of September even though early-to-mid October is typically closer to peak in this part of Vermont. General consensus across threads: September itself is a genuinely pleasant, less crowded window to catch the start of the season before peak leaf-peeping traffic arrives.
GreenMountainsVermontRegular · September · 1 month ago · Read more on Tripadvisor ↗

Other months in Killington

Killington-forum threads on a November visit describe the resort as genuinely the first in Vermont open most seasons, posters naming a reliable opening by Thanksgiving weekend as standard. Regulars call seasonal on-mountain restaurants genuinely running by mid-November, several posters naming this as lining up with the start of lift operations. Posters call the trail network genuinely the largest and most varied in the East, several regulars naming downhill, snowboarding, snowshoeing and cross-country as all available once the season gets going. Regulars call the nightlife scene genuinely a real part of the draw, several threads naming everything from casual bars to livelier dance-club venues once crowds arrive. Posters recommend checking opening-day confirmations before booking November trips specifically, several regulars calling this standard given how much early-season timing can shift. The record: 0.4C days, -6.9C nights, 92.3mm across over 12 days and 76 percent humidity.
KillingtonNovemberRegular · November · 1 month ago · Read more on Tripadvisor ↗
Killington-forum reviews on a June visit describe the mountain bike park as a real standout, posters naming thirty-five miles of trails across all skill levels with rental bikes available on site. Regulars call the gondola a real way up for riders, several posters naming this the standard way to access downhill trails without pedaling the climb. Posters call mid-June through mid-September genuinely prime time here, several regulars naming solid trail conditions as standard through this stretch. Regulars call the Peak Lodge cafeteria at the summit a real convenient stop, several threads naming it a good spot for a break between runs. Posters recommend booking a bike or lesson ahead for a June visit, several regulars calling this standard given how popular the park has become. The record: 17.2C days, 7.5C nights, an extraordinarily high 116.6mm across over 14 days and 72 percent humidity.
KillingtonJuneRegular · June · 1 month ago · Read more on Tripadvisor ↗
Killington-forum threads on an October visit describe early in the month, around Columbus Day weekend, as typically near-peak for fall foliage, posters calling accommodation worth booking well ahead given how many visitors time trips around the color. Regulars call late October foliage more hit or miss, some suggesting the Champlain Valley or points further south once the higher elevations have already turned. Regulars recommend Route 100 as a real standout scenic drive, several artisanal cheesemakers along the route worth a stop. Posters call the area strong for hiking, history and scenic drives beyond foliage alone, a real draw for visitors not chasing color specifically. Regulars recommend real layers regardless of a mild afternoon, mountain mornings here turning sharply cooler by October. The record: 8.9C days feeling like 7C, 0.6C nights, an extraordinarily high 130.5mm across over 12 days and 78 percent humidity.
KillingtonOctoberRegular · October · 1 month ago · Read more on Tripadvisor ↗
Killington-forum threads on where to ski in January call this among the more likely months for real accumulation on the ground, posters describing a couple of feet as entirely plausible by midmonth. Regulars are direct January skiing can be wonderful but genuinely very cold, temperatures capable of sitting in the teens Fahrenheit for stretches. Posters describe conditions as swinging meaningfully within the same week, sometimes staying properly cold and snowy, other times turning surprisingly green and bare. Regulars call northern and northeastern Vermont generally snowier than the central region Killington sits in. Posters recommend real layers regardless of forecast given how fast conditions can shift. Regulars call the resort's extensive snowmaking a genuine backstop whenever cold enough to support it. The record: -7.3C days feeling like -12C, -16.1C nights, a notably high 70.6cm of fresh accumulation and 76 percent humidity.
KillingtonJanuaryRegular · January · 1 month ago · Read more on Tripadvisor ↗

Add your own note from Killington's card on the map.

Killington climate normals — September

Daytime high16°C / 60°F🙂 cool
Nighttime low6°C / 43°F
Feels like (high)14°C / 57°F
Rainfall95 mm / 3.7 in🌧 rainy
Rainy days9 days
Humidity76%💦 very humid
Dew point6°C / 43°F
Sunshine9.2 h/day
Daylight12.5 h
Wind13 km/h / 8 mph
Air quality (US AQI)35🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Killington in September

How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.

Peak crowdsFall foliage, Summer break in United States(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Killington's weather

Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).

Fair weatherKillington's best weather comes in February, March and December — separate windows, not one continuous season.

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Best weatherFair weatherToughest weather

What's on in Killington in September

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Season

    Bike park season

    20 May – 20 Oct · usuallyTrail season

    The lifts turn again from late May for downhill riding, opening zone by zone as the ground dries: Snowshed first, Ramshead in June, the gondola terrain in July. Source ↗

  • Nature

    Fall foliage

    22 Sep – 15 Oct · usuallyAutumn colourCrowded

    The summit turns in the last days of September and the valleys a week or so behind. Route 100 and the Sherburne Pass crawl at weekends, and the gondola runs for people who have no intention of skiing.

What's on around the world in September →

Nearby, and something's on

Within 300 km of Killington — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Killington?

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Killington in September — FAQ

Is September a good time to visit Killington?
September in Killington: cool, rainy, with clean air — not the best time to visit. It ranks #9 of 12 months for Killington on SeasonMap's comfort score (21/100).
What is the weather like in Killington in September?
In September, Killington averages a daily high of 15.7°C and a low of 6.3°C, with about 95.2 mm of rain over roughly 9.3 rainy days.
What is the air quality in Killington in September?
Killington has a mean US Air Quality Index of about 35 in September.

Within 300 km: Stowe's Mount Mansfield summer season around 25 May – 15 Oct, and Lake Placid's Adirondack foliage around 20 Sep – 15 Oct.