Mountain Weather

Lake District mountain weather in September.

Typical mountain and low-level wind, temperature and rainfall for September, based on 40 years of weather history.

40-year mountain climate

What is Lake District weather like in September?

Historically, September has been a variable month with a useful share of better high-ground days. Of 1,200 representative high-ground days, 26% were excellent or good, 54% were average, and 20% were poor or severe.

Dry days accounted for 51% of the sample, while extensive cloud affected 45%. These figures describe representative high ground around 978 metres, so coastal and low-level conditions can be milder.

Choose a September weekView Keswick conditions ↓Check the live forecast →
Excellent or good26%Historically dry51%High-ground temperature7.5°CTypical maximum gust28 mphStronger days around 38 mph
Valleys and trip bases

Low-level weather around Keswick in September.

Keswick, at roughly 80 metres, provides a practical low-level reference for Lake District. Across 1,200 historical days, the typical daytime high was 15.8°C, with warmer days around 17.6°C.

About 51% of days were dry and 50% combined dry weather with lighter winds. Conditions vary across glens, coasts and villages, so this should be used as regional trip-planning guidance rather than a forecast for every location.

Typical daily high15.8°CWarmer days around 17.6°CTypical overnight low10.7°CCooler nights around 8.4°CHistorically dry51%13% had 10 mm+ rainTypical maximum wind12 mphStronger days around 17 mph
Plan beyond the forecast

Choose an area and week.

Saturday dates are highlighted because they usually unlock the widest choice of seven-night cottage stays. Other arrival days still work.

Typical conditions, not a forecastThis describes representative high ground. A difficult hill day can still be suitable for a lower-level plan.
Week 37 · 12 September

What this week is typically like on Lake District high ground.

Across 280 comparable historical hill days, 26% were excellent or good and 24% were poor or severe.

Check the live Lake District forecast →
Historically excellent or good26%280 comparable days
Excellent6%Good20%Average50%Poor22%Severe2%
Historically dry49% of daysTypical daily max gust29 mphStronger days around 40 mphTypical high ground7.5°C24-hour mean near 978 mExtensive cloud41% of days

September context: 26% of days across the month were excellent or good; 20% were poor or severe. Read the full September guide.

Valley and low level

Around Keswick.

Representative base · 80 m
Typical daily high15.8°CWarmer days 17.6°CHistorically dry49%48% dry with lighter windMaximum wind13 mphStronger days 18 mphTypical overnight low10.7°CCooler nights 8.5°C
Planning a different time of year?Compare Lake District month by month
January to December

Lake District weather by month.

Each month has a detailed guide comparing high-ground hill days with typical conditions at a representative valley or low-level trip base.

January19% good
High ground: 45% average · 36% poor or severeKeswick: 45% dry · 6.9°C daily high
February20% good
High ground: 46% average · 34% poor or severeKeswick: 48% dry · 7.3°C daily high
March24% good
High ground: 50% average · 26% poor or severeKeswick: 50% dry · 8.8°C daily high
April30% good
High ground: 55% average · 15% poor or severeKeswick: 55% dry · 10.9°C daily high
May35% good
High ground: 51% average · 14% poor or severeKeswick: 55% dry · 13.9°C daily high
June31% good
High ground: 54% average · 15% poor or severeKeswick: 51% dry · 16.1°C daily high
July29% good
High ground: 56% average · 15% poor or severeKeswick: 46% dry · 17.5°C daily high
August27% good
High ground: 56% average · 17% poor or severeKeswick: 44% dry · 17.3°C daily high
September26% good
High ground: 54% average · 20% poor or severeKeswick: 51% dry · 15.8°C daily high
October19% good
High ground: 53% average · 28% poor or severeKeswick: 44% dry · 13.0°C daily high
November19% good
High ground: 51% average · 30% poor or severeKeswick: 43% dry · 9.8°C daily high
December21% good
High ground: 43% average · 36% poor or severeKeswick: 45% dry · 7.6°C daily high
Strongest historical signals

Best weeks of the year for Lake District mountain weather.

These are the six week bands with the largest historical share of excellent or good days. They are useful for broad trip timing, but the live forecast should decide the final plan.

  1. 01
    Week around 29 May37% excellent or good · 13% poor or severe
    Plan this week →
  2. 02
    Week around 17 April35% excellent or good · 11% poor or severe
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  3. 03
    Week around 8 May35% excellent or good · 15% poor or severe
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  4. 04
    Week around 1 May34% excellent or good · 12% poor or severe
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  5. 05
    Week around 15 May33% excellent or good · 16% poor or severe
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  6. 06
    Week around 22 May33% excellent or good · 17% poor or severe
    Plan this week →
20 mountain areas

Compare another part of the UK.

Each page includes weekly and monthly high-ground and low-level climate summaries, a highlighted Saturday planner and nearby accommodation.

Angus GlensScotland · strongest historical month: May23% good Argyll and Loch LomondScotland · strongest historical month: May28% good Bannau Brycheiniog (Brecon Beacons)Wales · strongest historical month: June31% good CairngormsScotland · strongest historical month: May22% good Clwydian Range and BerwynsWales · strongest historical month: April28% good DartmoorEngland · strongest historical month: July37% good Eryri (Snowdonia)Wales · strongest historical month: May31% good Lake DistrictEngland · strongest historical month: May35% good Lewis and HarrisScotland · strongest historical month: May29% good LochaberScotland · strongest historical month: May25% good Mid Wales and Cambrian MountainsWales · strongest historical month: May32% good Monadhliath and Creag MeagaidhScotland · strongest historical month: May22% good North PenninesEngland · strongest historical month: May28% good Northumberland and CheviotsEngland · strongest historical month: May32% good Northwest HighlandsScotland · strongest historical month: May27% good Peak DistrictEngland · strongest historical month: July30% good Perthshire HighlandsScotland · strongest historical month: May25% good SkyeScotland · strongest historical month: May38% good Southern ScotlandScotland · strongest historical month: May34% good Yorkshire DalesEngland · strongest historical month: May32% good