Mountain Weather

Best time to visit Argyll and Loch Lomond for mountain weather.

Across a typical year, 39% of high-ground days were settled for rain and wind, with around 213 wet days.

Settled high-ground days39%Dry with manageable model-grid gustsWet days per year213At least 1 mm of precipitationTypical annual precipitation1,933 mmRepresentative high-ground gridAnnual bright sunshine1,179 hrsMet Office 1991–2020 · Arrochymore

Sunshine is a separate Met Office long-term average from Arrochymore, used for regional context. It is not included in the settled-day score and does not promise summit views.

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 Argyll and Loch Lomond high ground.

Across 280 comparable historical hill days, 41% were settled for rain and wind and 20% were poor or severe for rain and wind.

Check the live Argyll and Loch Lomond forecast →
Settled rain and wind41%280 comparable days
Dry and light wind26%Dry, manageable wind15%Mixed39%Poor16%Severe4%
Historically dry44% of daysTypical daily max gust28 mphStronger days around 39 mphTypical high ground6.7°C24-hour mean near 1,011 mPoor or severe rain/wind20% of daysViews are checked separately in the live forecast

September context: 43% of days across the month were settled for rain and wind; 17% were poor or severe for rain and wind. Read the full September guide.

Valley and low level for this week

Around Arrochar.

Representative base · 15 m
Typical daily high15.9°CWarmer days 17.8°CHistorically dry44%44% dry with lighter windMaximum wind11 mphStronger days 15 mphTypical overnight low10.3°CCooler nights 7.8°C
Planning a different time of year?Compare Argyll and Loch Lomond month by month
January to December

Argyll and Loch Lomond 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.

January35% settled rain/wind
High ground: 33% mixed · 32% poor or severe for rain/windArrochar: 39% dry · 6.9°C daily high
February36% settled rain/wind
High ground: 33% mixed · 31% poor or severe for rain/windArrochar: 40% dry · 7.4°C daily high
March37% settled rain/wind
High ground: 38% mixed · 25% poor or severe for rain/windArrochar: 42% dry · 9.3°C daily high
April42% settled rain/wind
High ground: 47% mixed · 11% poor or severe for rain/windArrochar: 48% dry · 11.5°C daily high
May45% settled rain/wind
High ground: 44% mixed · 11% poor or severe for rain/windArrochar: 48% dry · 14.4°C daily high
June43% settled rain/wind
High ground: 49% mixed · 8% poor or severe for rain/windArrochar: 45% dry · 16.5°C daily high
July40% settled rain/wind
High ground: 51% mixed · 9% poor or severe for rain/windArrochar: 42% dry · 18.0°C daily high
August36% settled rain/wind
High ground: 50% mixed · 14% poor or severe for rain/windArrochar: 38% dry · 17.7°C daily high
September43% settled rain/wind
High ground: 40% mixed · 17% poor or severe for rain/windArrochar: 46% dry · 16.0°C daily high
October35% settled rain/wind
High ground: 40% mixed · 25% poor or severe for rain/windArrochar: 39% dry · 13.0°C daily high
November39% settled rain/wind
High ground: 37% mixed · 24% poor or severe for rain/windArrochar: 42% dry · 9.6°C daily high
December39% settled rain/wind
High ground: 31% mixed · 30% poor or severe for rain/windArrochar: 43% dry · 7.3°C daily high
Strongest historical signals

Best weeks of the year for Argyll and Loch Lomond mountain weather.

These are the six week bands with the largest historical share of settled rain-and-wind days. Views are not included; use the live forecast nearer the trip.

  1. 01
    Week around 29 May48% settled rain/wind · 10% poor or severe
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  2. 02
    Week around 19 September48% settled rain/wind · 19% poor or severe
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  3. 03
    Week around 22 May47% settled rain/wind · 15% poor or severe
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  4. 04
    Week around 15 May46% settled rain/wind · 10% poor or severe
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  5. 05
    Week around 28 November46% settled rain/wind · 25% poor or severe
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  6. 06
    Week around 17 April45% settled rain/wind · 10% poor or severe
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20 mountain areas

Compare another part of the UK.

The comparison uses the whole year, rather than putting each region's single best month beside another's typical conditions.

Angus GlensScotland · about 184 wet days · 1,047 mm rain · 1,411 sunshine hrs41% settled annually Argyll and Loch LomondScotland · about 213 wet days · 1,933 mm rain · 1,179 sunshine hrs39% settled annually Bannau Brycheiniog (Brecon Beacons)Wales · about 170 wet days · 1,161 mm rain · 1,422 sunshine hrs50% settled annually CairngormsScotland · about 197 wet days · 1,135 mm rain · 1,209 sunshine hrs42% settled annually Clwydian Range and BerwynsWales · about 175 wet days · 1,054 mm rain · 1,573 sunshine hrs48% settled annually DartmoorEngland · about 154 wet days · 942 mm rain · 1,494 sunshine hrs54% settled annually Eryri (Snowdonia)Wales · about 195 wet days · 1,355 mm rain · 1,458 sunshine hrs43% settled annually Lake DistrictEngland · about 194 wet days · 1,447 mm rain · 1,225 sunshine hrs43% settled annually Lewis and HarrisScotland · about 206 wet days · 1,204 mm rain · 1,256 sunshine hrs37% settled annually LochaberScotland · about 218 wet days · 1,931 mm rain · 1,005 sunshine hrs38% settled annually Mid Wales and Cambrian MountainsWales · about 180 wet days · 1,159 mm rain · 1,279 sunshine hrs48% settled annually Monadhliath and Creag MeagaidhScotland · about 202 wet days · 1,307 mm rain · 1,091 sunshine hrs41% settled annually North PenninesEngland · about 178 wet days · 1,037 mm rain · 1,421 sunshine hrs47% settled annually Northumberland and CheviotsEngland · about 152 wet days · 761 mm rain · 1,535 sunshine hrs50% settled annually Northwest HighlandsScotland · about 231 wet days · 1,860 mm rain · 1,044 sunshine hrs33% settled annually Peak DistrictEngland · about 164 wet days · 916 mm rain · 1,383 sunshine hrs49% settled annually Perthshire HighlandsScotland · about 198 wet days · 1,483 mm rain · 1,142 sunshine hrs43% settled annually SkyeScotland · about 230 wet days · 2,031 mm rain · 1,200 sunshine hrs36% settled annually Southern ScotlandScotland · about 203 wet days · 1,368 mm rain · 1,215 sunshine hrs42% settled annually Yorkshire DalesEngland · about 183 wet days · 1,219 mm rain · 1,154 sunshine hrs46% settled annually