SeasonMapWindermere weather in September
United Kingdom
September in Windermere: cool, rainy, with clean air — a great time to visit.
#6 of 12 months in Windermere · #769 of 1383 destinations to visit in September · comfort 78/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Windermere in September
Other months in Windermere
June in the Lake District is the long-evening month — light until 10 or half past — and the forum's argument for it is timing rather than weather: school holidays have not started, so it is quieter than July or August, with everything fresh and green for walking. The weather is the usual bargain. Windermere averages 17°C in June with rain on fifteen days, and regulars are blunt about why the place is so green. Their phrasing is that it cannot be planned around — hot and sunny or cold and wet from one week to the next — so bring clothes for all seasons. Quieter than the school holidays is not the same as quiet.
Add your own note from Windermere's card on the map.
Windermere climate normals — September
| Daytime high | 16°C / 61°F | 🙂 cool |
|---|---|---|
| Nighttime low | 9°C / 48°F | |
| Feels like (high) | 15°C / 59°F | |
| Sea temperature | 18°C / 64°F | 🧊 bracing |
| Rainfall | 136 mm / 5.3 in | 🌧 rainy |
| Rainy days | 17 days | |
| Humidity | 86% | 💦 very humid |
| Dew point | 10°C / 50°F | |
| Sunshine | 7 h/day | |
| Daylight | 12.7 h | |
| Wind | 20 km/h / 12 mph | |
| Air quality (US AQI) | 33 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Windermere 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.
BusyPeak Lakes summer, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Windermere'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 weatherWindermere's weather peaks May–July, best around June.
Best weatherFair weatherToughest weather
What's on in Windermere in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Midge season
20 May – 15 Sep · usuallyInsect seasonStill, damp evenings by the water and in the wooded valleys are when they are worst; the open fells and anywhere with a breeze are fine. Nowhere near a Scottish summer, but enough to move a picnic.
- Holiday
Peak Lakes summer
18 Jul – 1 SepSchool holidaysCrowdedBook earlyThe A591 through Ambleside crawls, Bowness pier is a queue and the popular fell car parks are full before nine. Starting early or walking from the village solves most of it. Source ↗
Nearby, and something's on
Within 300 km of Windermere — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Windermere?
Windermere in September — FAQ
- Is September a good time to visit Windermere?
- September in Windermere: cool, rainy, with clean air — a great time to visit. It ranks #6 of 12 months for Windermere on SeasonMap's comfort score (78/100).
- What is the weather like in Windermere in September?
- In September, Windermere averages a daily high of 16.3°C and a low of 8.7°C, with about 135.7 mm of rain over roughly 16.6 rainy days.
- What is the air quality in Windermere in September?
- Windermere has a mean US Air Quality Index of about 33 in September.
Other months in Windermere
Compare Windermere in September
Warmer or cooler than Windermere in September
Similar destinations in Northern Europe — September
Within 300 km: Liverpool's International Beatleweek on 26 Aug – 1 Sep, and Manchester's Manchester Pride around 20 Aug – 1 Sep.