SeasonMapKeswick (Lake District) weather in September
United Kingdom
September in Keswick: nice, soaked, with clean air — fine if you can take 18 rainy days.
#6 of 12 months in Keswick · #751 of 1383 destinations to visit in September · comfort 78/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Keswick in September
Other months in Keswick
Keswick's forum is upfront that June can go either way — hot and sunny some years, cold and wet others — and that the Lake District is one of England's wettest regions regardless, with conditions on the fells changing within minutes. Regulars still rate it a good month: long daylight into nearly 10pm leaves plenty of time for a fell walk after dinner.
Add your own note from Keswick's card on the map.
Keswick climate normals — September
| Daytime high | 17°C / 63°F | 😎 nice |
|---|---|---|
| Nighttime low | 9°C / 48°F | |
| Feels like (high) | 16°C / 61°F | |
| Rainfall | 151 mm / 5.9 in | ⛈ soaked |
| Rainy days | 18 days | |
| Humidity | 85% | 💦 very humid |
| Dew point | 10°C / 50°F | |
| Sunshine | 7 h/day | |
| Daylight | 12.7 h | |
| Wind | 21 km/h / 13 mph | |
| Air quality (US AQI) | 36 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Keswick 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.
BusyEnglish school holidays, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Keswick'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 weatherKeswick's weather peaks May–July.
Best weatherFair weatherToughest weather
What's on in Keswick in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Derwentwater launch season
20 Mar – 1 Nov · usuallySummer season opensClosuresThe launches round the lake run a full timetable from spring to the end of October and a skeleton one after. The jetties for Catbells and Lodore are how most people get to those walks. Source ↗
- Holiday
English school holidays
18 Jul – 1 SepCrowdedBook earlyThe Borrowdale road and every car park south of the town are full by ten through August, and the Keswick Launch queues with them. The high fells absorb it better than the lakeshore does. Source ↗
Nearby, and something's on
Within 300 km of Keswick — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Keswick?
Keswick in September — FAQ
- Is September a good time to visit Keswick?
- September in Keswick: nice, soaked, with clean air — fine if you can take 18 rainy days. It ranks #6 of 12 months for Keswick on SeasonMap's comfort score (78/100).
- What is the weather like in Keswick in September?
- In September, Keswick averages a daily high of 17.3°C and a low of 9.1°C, with about 151 mm of rain over roughly 17.6 rainy days.
- What is the air quality in Keswick in September?
- Keswick has a mean US Air Quality Index of about 36 in September.
Other months in Keswick
Compare Keswick in September
Warmer or cooler than Keswick 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.