Updated: 2026-08-03
Between 3 November 1986 and 20 December 1986, the weather station at Paisley — the nearest Met Office measuring point to Glasgow, about 11.4 km away — recorded rain on 48 consecutive days. That is the longest wet spell ever registered at this station since records began in 1914. Over those seven weeks, a total of 387.7 mm of precipitation fell.
What this means: from early November almost to Christmas, every single day produced measurable rain. No dry day interrupted the sequence. For anyone living through it, the ground never had a chance to dry out.
The point of measurement closest to Glasgow is the station at Paisley, in the county of Renfrewshire, situated at 32 m above sea level. These are its historical records. The climate of Glasgow itself can differ from what the station registers due to local factors — different altitude, proximity to the River Clyde, valley sheltering effects, or urban heat. Still, the Paisley record is the best long-term reference we have for the area, and it gives us a reliable picture of what extreme wet spells look like in this part of western Scotland.
The 48-day streak of 1986 stands out even for a region known for rain. Western Scotland is no stranger to damp winters, but a stretch of this length — with no single day without precipitation — is exceptional by any standard. The total rainfall accumulated during that period, 387.7 mm, is a figure worth pausing on. To put it in context: that is the kind of precipitation total you might expect from several months of average winter rain in many parts of the UK, arriving in just seven weeks.
What makes this record particularly striking is its position in the calendar. The wet spell began in early November, when autumn was well underway, and continued through the shortest days of the year, ending just five days before Christmas Eve. That means the entire transition from late autumn into winter — usually a period of changeable but sometimes clear, crisp days — was instead a relentless sequence of rain. The station kept measuring precipitation day after day after day. No frosty mornings with dry air, no bright intervals with a chance to walk without an umbrella: 48 days straight.
This is the kind of event that shapes how a region remembers a year. Ninetheen eighty-six already had its own meteorological reputation in the UK — it was a year of notable storms and unsettled conditions — but this late-autumn sequence at Paisley holds the record for the longest continuous wet stretch in the station's history.
Here is the definitive data for the longest wet spell, exactly as registered at the Paisley station:
| Start date | End date | Consecutive days with rain | Total precipitation (mm) |
|---|---|---|---|
| 3 November 1986 | 20 December 1986 | 48 | 387.7 |
In meteorological terms, a wet day is any day where precipitation exceeds zero millimetres. That may sound like a low bar — and it is — but when you are looking for the longest continuous wet spell, even a day with a mere trace of rain breaks the chain. The 48-day streak from 1986 means that on every single one of those days, the rain gauge at Paisley recorded more than zero millimetres. Some days were likely light drizzles; others were probably substantial downpours. The total of 387.7 mm tells us that the majority of those days must have brought genuine rainfall, not just dampness in the air.
This precision matters. A single dry day — even a dry afternoon — would have reset the clock. The fact that no such day appeared for 48 consecutive days, across a span of two months, speaks to a remarkably persistent atmospheric pattern over western Scotland during that period.
The Paisley station has records spanning from 1 January 1914 to 2 April 2011 — nearly a century of continuous observation. The 1986 wet spell remains the longest in that entire period. It has not been beaten in the decades since. Between 1914 and 2011, no other stretch of consecutive rainy days came close to matching those 48 days of late 1986.
That is worth repeating: for the best part of a hundred years of records — through two World Wars, the post-war decades, the 1970s which were known for wet winters, and the 1990s and 2000s with their own notable floods — the 48-day wet spell of autumn 1986 has stood unchallenged at this station.
For anyone living in or near Glasgow, a record like this is not just a piece of trivia. It tells you something about the upper limits of what the local climate can deliver. If you are planning an outdoor event — a wedding, a festival, an agricultural fair — you can look at records like this and understand what the worst case looks like. It also matters for infrastructure planning: drainage systems, flood defences, and building design all need to account for the possibility of extremely long wet periods, not just the occasional heavy storm.
From a climatological perspective, the 1986 event is a reminder that "normal" and "extreme" in Britain are separated by less distance than people sometimes assume. A wet spell of this duration does not require a unique meteorological freak; it requires a pattern that persists. When the Atlantic storm track locks into place over western Scotland, the result can be weeks — not days — of unbroken rain.
And while 48 days is the record, it is worth remembering that this is the number for a station that measures continuously. The actual experience of rain in Glasgow itself, even just 11.4 km away, may have varied on individual days — a hill here, a valley there — but the overall pattern would have been very similar. That is the value of a long, reliable station series: it gives you a solid, honest reference for what the region can produce.
Western Scotland's rain is not a bug; it is a feature of the place. The same Atlantic systems that bring this persistent precipitation also keep winters mild and create the famously green landscapes of the region. The 1986 record is an extreme point on that spectrum — a reminder that the climate here can tip from "damp" into "something you have to adapt to." And adapt people do. A 48-day wet spell is a challenge for agriculture, for outdoor industries, and for mental health. It is also, in a strange way, part of what builds the character of a region: the shared memory of that winter when the rain simply never stopped.
If you live in Glasgow and remember the autumn of 1986, you lived through the wettest stretch this area has recorded in over a century. If you are younger than that — and most people are — you have seen nothing comparable in your lifetime. The records, though, are still there, carefully maintained and verified, so we know exactly what happened.
Numbers like 48 days and 387.7 mm can feel abstract. Let us bring them back to human scale. Picture November 3, 1986. You wake up, it is raining. It rains throughout the day. It rains the next day, and the next. After a week, you notice the ground has stopped absorbing water. After two weeks, you are checking for damp patches indoors. After a month, you are rearranging your life around the weather forecast, even though it is almost pointless because it is always the same forecast. And then it rains for another seventeen days beyond that. That is what 48 consecutive wet days means.
It is a record that has stood for decades, and it may stand for many more. The climate is changing, and some climate models suggest wetter winters for western Scotland, which means this record could one day fall. But as of the latest data in this series, ending in April 2011, it has not fallen. The 48-day wet spell of 1986 remains the longest ever recorded at the Paisley station, the nearest reliable measuring point to Glasgow.
Source: Met Office MIDAS data, Paisley station, 1914–2011.
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