Updated: 2026-08-13
If you live in Valley or are planning a trip there, you might wonder just how often the temperature climbs to genuinely uncomfortable levels. Using official Met Office data from the Valley weather station, we can look at how frequently extreme heat days occur. The data, spanning from 1941-07-01 to 2026-08-12, tells a clear story about what "hot" really means here.
The most recent standout year is 2022, which recorded 5 days where the maximum temperature exceeded 28°C. That might not sound like many, but in the context of Valley's maritime climate, it is a notable concentration of warmth. For comparison, the absolute highest temperature ever recorded at this station was 33.9°C, logged on 2026-06-24. That day represents the ceiling of what Valley has experienced, but the frequency of hitting the 28°C threshold is what really defines the character of its summers.
Looking back at the historical averages, the picture becomes even more interesting. The decade-by-decade breakdown shows that extreme heat days were not always so common. In the 1960s, the average number of days per year above 28°C was 0.0 — a full decade with no days at that threshold. The 1940s averaged 0.6 days per year, and the 1950s dipped to 0.4. Fast forward to the 2020s, and that average has jumped to 2.4 days per year. That is not a subtle shift; it is a clear acceleration in the frequency of hot days in recent years.
The table below, derived from the official Met Office record for Valley, shows the annual counts of days with a maximum temperature of 28°C or higher. This is the most direct way to see how individual years compare. Note that the values here represent the complete series available in our dataset, focusing on the most relevant blocks of data for this analysis.
| Year | Days above 28°C | Hottest Max Temp (°C) |
|---|---|---|
| 1941 | 0 | 25.6 |
| 1944 | 0 | 26.1 |
| 1945 | 0 | 25.6 |
| 1946 | 0 | 23.9 |
| 1949 | 0 | 27.2 |
Wait — the table above only shows a few years. That's because it highlights the five years with the fewest extreme heat days in the entire period. In those years — 1941, 1944, 1945, 1946, and 1949 — the thermometer never once reached 28°C. The hottest it got in 1946 was 23.9°C, which is a mild summer day by any standard. These zero-day years are particularly telling: they show that a whole summer could pass in Valley without a single day of extreme heat, something that rarely happens in the modern climate.
At the other end of the scale, some years stand out as exceptionally warm. The five highest years for extreme heat days in Valley are led by 1976, which recorded 9 days above 28°C and saw its highest temperature of the year reach 30.6°C. That legendary summer is still talked about in the UK. The other years in this top tier are 1995 with 7 days, 2022 with 5 days, and then 1983 and 2003, each with 4 days. Notably, 2003 reached a soaring 33.0°C — very close to the all-time station record of 33.9°C.
To see the long-term picture clearly, it helps to look at the average number of extreme heat days per year for each decade. The Met Office data for Valley tells a story of accelerating warmth:
| Decade | Average Days Above 28°C per Year |
|---|---|
| 1940s | 0.6 |
| 1950s | 0.4 |
| 1960s | 0.0 |
| 1970s | 1.1 |
| 1980s | 0.9 |
| 1990s | 0.9 |
| 2000s | 0.9 |
| 2010s | 0.4 |
| 2020s | 2.4 |
Read this table from top to bottom and the pattern is unmistakable. The 1960s were completely free of extreme heat days. The 1970s jumped to 1.1 per year, partly driven by that remarkable 1976 summer. The 1980s, 1990s, and 2000s each hovered near 0.9. Then comes the 2020s, which have already reached 2.4 days per year on average — a figure more than double any decade since the 1970s.
What does this mean in practical terms for Valley residents? A day above 28°C is an event. It is the kind of day when you seek shade, check on vulnerable neighbours, and perhaps reconsider that afternoon walk. In the 1960s, you could almost forget such days existed. Today, you can expect roughly two or three of them each summer. And while 28°C is the threshold we have used here — not the 35°C that defines extreme heat in hotter climates — the trend is what matters. Fewer than 3 days per year may not sound dramatic, but the direction of change is consistent with what we are seeing across the UK.
It is also worth noting that while the frequency of hot days is rising, the intensity is rising too. The 2026 recording of 33.9°C on 24 June is the highest temperature ever documented at Valley, edging out the 33.0°C reached in 2003. The combination of more frequent and more intense heat is exactly what climatologists have been projecting for coastal areas in the UK, and Valley's own records now reflect that shift.
For gardeners, event planners, or anyone who simply tracks the weather, the message from the last decade is clear: hot days in Valley are no longer a rarity. They are a regular, if brief, feature of the summer calendar, and their frequency is increasing decade on decade.
Source: Met Office, Valley weather station. Data period: 1941–2026.
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© 2026 HistoClima · data: Met Office (OGL v3.0) · not affiliated with Met Office · citation permitted with source.