Weather in Glasgow in August

Shoulder season. August is shoulder season in Glasgow — cheaper, quieter, and a genuine gamble. You should expect rain on 22 days of the month, which is more days wet than dry.

August ranks 2 of 12 in Glasgow. Only July scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 22 of the month's 31 days, 4 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Pack for 17.6 °C days and 11.1 °C nights; the spread matters more here than any single number.

What the averages hide

The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest August day reached 25.8 °C and the coldest night fell to 5.1 °C, and the wettest single day dropped 40 mm — roughly 29% of the month's rain in one day.

August is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest August on record still delivered 226 mm against 56 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 137 mm average is a reasonable planning figure, not a promise.

Wind is light at 11.2 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 88%, high enough to notice on the warm days without dominating them.

How August sits in the year

Temperatures hold steady either side: 18 °C in July, 17.6 here, 15.5 in September. Nothing about the timing within the month matters much.

Daylight in August

15.2 hours of daylight, losing 2.1 hours across the month. That is between Glasgow's extremes of 17.5 and 7 hours, so days are long enough not to constrain the plan.

An inland climate

Despite being inland, the year stays fairly even: 16.1 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

August in Glasgow versus nearby

If Glasgow is one option among several, the nearby comparison is worth making. Edinburgh is close enough to be a coin toss — within a degree on temperature, 5 days less rain. Manchester is close enough to be a coin toss — within a degree on temperature, 3 days less rain.

So: August is effectively as good as it gets here — 2 points behind July, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Glasgow

See all twelve months in Glasgow, or where else to go in August.