July brings 19°C daytime highs, 73mm of precipitation across about 12 wet days and 16.7 hours of daylight — best for hiking, cycling and long light evenings. The strongest run of the year is June to August. December is the quietest month: wet but green, and still good for aurora & dark skies, festive season and quiet and local.
Long-run climate normals for Glasgow. Month ratings compare months within Glasgow only — they are not a ranking of Glasgow against other destinations, and they are not a forecast for a specific year.
Last updated: · Live forecast data refreshes hourly.
| Best month | July — Hiking, Cycling, Long light evenings |
| Best 3-month window | June–August |
| Quietest month | December — Wet but green |
| Driest month | April — 62mm |
| Wettest month | October — 113mm |
| Warmest / coolest | July 19°C / February 6°C |
| Seasonality | Strongly seasonal — the months feel like different places |
| Annual rainfall | 1124mm over roughly 170 rain days |
December gets roughly 40% more precipitation than July — 102mm against 73mm. That difference, more than temperature, is what changes how a day here feels.
Daytime highs only move 13°C across the whole year (6–19°C), so timing matters far less here than rainfall does.
June gives you 17.3 hours of daylight against just 6.7 in December — a 11-hour difference in how much you can actually fit into a day.
April is the driest month at 62mm across roughly 10 wet days, while October peaks at 113mm.
June is almost as good as July, but usually quieter and cheaper. If your dates are flexible, it is the easier trip.
Glasgow changes character completely through the year — July and December are effectively two different destinations. Pick the month that matches what you want to do, not the highest-rated one.
Ratings compare months within Glasgow, not against destinations worldwide: five stars means the best time to be here, not that Glasgow beats anywhere else. Tags describe what the conditions actually suit.
| Month | Rating | High / Low | Precipitation | Wet days | Sun | Daylight | Best for |
|---|---|---|---|---|---|---|---|
| January | ★★☆☆☆ | 6°C / 1°C | 112mm (rain/snow) | 18 | 5h | 7.3h | Aurora & dark skies · Quiet and local |
| February | ★★☆☆☆ | 6°C / 1°C | 77mm (rain/snow) | 13 | 3h | 9.2h | Low-angle light · Quiet and local |
| March | ★★☆☆☆ | 8°C / 2°C | 83mm | 14 | 5h | 11.6h | Quiet and local |
| April | ★★★★☆ | 11°C / 5°C | 62mm | 10 | 6h | 14h | Spring greenery |
| May | ★★★★☆ | 14°C / 7°C | 64mm | 10 | 6h | 16.1h | Hiking · Cycling · Spring greenery |
| June | ★★★★★ | 17°C / 10°C | 67mm | 11 | 11h | 17.3h | Hiking · Cycling · Long light evenings |
| July | ★★★★★ | 19°C / 11°C | 73mm | 12 | 11h | 16.7h | Hiking · Cycling · Long light evenings |
| August | ★★★★★ | 19°C / 11°C | 96mm | 16 | 11h | 14.8h | All-round conditions |
| September | ★★★★☆ | 17°C / 10°C | 93mm | 15 | 7h | 12.4h | Autumn colour |
| October | ★★★☆☆ | 14°C / 7°C | 113mm | 18 | 6h | 10h | Autumn colour · Low-angle light |
| November | ★★☆☆☆ | 11°C / 5°C | 100mm | 16 | 4h | 7.9h | Aurora & dark skies · Autumn colour · Quiet and local |
| December | ★★☆☆☆ | 8°C / 2°C | 102mm | 17 | 3h | 6.7h | Aurora & dark skies · Festive season · Quiet and local |
| You are planning | Pick | Why |
|---|---|---|
| Sun & beach days | June | 11h daily sunshine, 17°C highs and only 11 rain days. |
| City walking & sightseeing | May | 14°C highs with 16.1h of daylight — long days without heat fatigue. |
| Photography & light | June | 11h of sun and 17.3h daylight give the widest window for golden-hour work. |
| Value & fewer crowds | May | Scores 64/100 — close to peak conditions but outside the busiest window. |
| Cooler-weather travel | June | 17°C highs and 10°C nights suit anyone who dislikes heat. |
Each month in Glasgow is described from long-run climate normals and then rated relative to the other eleven months in the same city. A five-star January in a cold destination means January is one of the best times to be there — not that it beats a Mediterranean summer.
| Factor | Weight | What it measures |
|---|---|---|
| Temperature | Described | Average daytime high and overnight low for the month, shown as measured rather than judged. |
| Precipitation | Described | Monthly millimetres and wet-day count, labelled as snow or rain/snow where temperatures make that the likely phase. |
| Sunshine & daylight | Described | Average daily sunshine hours and astronomical daylight length at mid-month, from the city’s latitude. |
| “Best for” tags | Derived | Applied only when the conditions genuinely support the activity — snow depth-friendly cold for skiing, 13–24°C and low rain risk for hiking, dark evenings at high latitude for aurora. A month with few strong use cases gets fewer tags rather than padded ones. |
| Star rating | Relative | Ranks the month against the other eleven months in the same city. Never a comparison between cities. |
Figures are long-run climate averages, not a forecast for a specific year. Where a month lacks sourced rainfall or humidity, the value is modelled from temperature range and rain frequency.
July is the best all-round month in Glasgow: 19°C highs, 73mm of precipitation and 16.7 hours of daylight, which suits hiking, cycling and long light evenings. The strongest three-month window is June to August.
December — 8°C highs, 102mm of precipitation over roughly 17 days and 6.7 hours of daylight. It is the cheapest and least crowded time to go, and it still works for aurora & dark skies, festive season and quiet and local.
April is the driest month at 62mm over about 10 rain days, against 113mm in October. Across the year Glasgow records around 1124mm.
Yes, but the months are genuinely different trips. July suits hiking, cycling and long light evenings, while December suits aurora & dark skies, festive season and quiet and local. Pick the month that matches what you want to do.
Daylight ranges from 6.7 hours in December to 17.3 hours in June, calculated from the city's latitude.