Updated: 2026-07-31
The closest Met Office measuring point to Birmingham is the station at coton-in-the-elms (Derbyshire), situated at 85 m above sea level and about 32.6 km from the city centre. The real climate in Birmingham may differ from this station's readings due to local factors such as altitude, proximity to the River Tame, urban heat from the city, or sheltered valleys. These records are the best available reference, but they are measurements from the station, not from Birmingham itself.
In the recorded period from 1 March 1991 to the end of 2025, the latest spring frost (a day with minimum temperature below 0°C) occurred on 9 May 2025, with a minimum temperature of -0.3°C. That is the most recent late frost on record — a reminder that even in May, cold nights can still threaten tender blossoms in the area.
For gardeners and orchard owners near Birmingham, the practical question is simple: when can I plant without worrying about a late frost killing the flowers? Based on the station data from coton-in-the-elms, the answer leans toward caution well into May. The 9 May 2025 frost is the latest ever recorded in this series, meaning the risk window is not fully closed until mid-May in some years.
It is important to note what counts as a frost in these records. The Met Office defines a ground frost or air frost when the minimum temperature drops below 0°C. Spring here means March, April, and May — the months when blossom (especially fruit trees like apples, pears, and plums) is most vulnerable. A single night at -0.3°C can damage open flowers, even though it is a relatively mild frost by winter standards.
The table below gives the average minimum temperature for each month of the year, computed from all the daily minimum readings available at coton-in-the-elms across the entire period (1991–2025). This shows how quickly the risk of frost declines from March through May.
| Month | Average Minimum Temperature (°C) |
|---|---|
| 1 (January) | 1.5 |
| 2 (February) | 1.9 |
| 3 (March) | 2.8 |
| 4 (April) | 4.1 |
| 5 (May) | 7.0 |
| 6 (June) | 10.0 |
| 7 (July) | 11.9 |
| 8 (August) | 11.9 |
| 9 (September) | 9.8 |
| 10 (October) | 7.3 |
| 11 (November) | 4.1 |
| 12 (December) | 2.1 |
The pattern is exactly what you would expect for inland central England. The average minimum in March sits at 2.8, still close to freezing, which explains why a sharp cold night can easily dip below zero. By April the average rises to 4.1, but individual nights can still fall lower during clear, calm spells. May is significantly safer with an average minimum of 7.0, yet the 9 May 2025 reading of -0.3 proves that frost is not impossible even then.
Fruit trees in the Birmingham area typically reach full bloom between mid-April and early May, depending on the variety and the warmth of the spring. A frost at this stage — even a light one like the -0.3°C recorded on 9 May 2025 — can kill the ovules inside the flowers, which then fail to develop into fruit. The economic impact for commercial orchards is substantial, but even for a single backyard tree, losing an entire year's crop to one cold night is frustrating.
What makes late frosts especially tricky is their localised nature. The temperature at coton-in-the-elms, which sits on relatively open land in Derbyshire, may be a degree or two lower than in the urban centre of Birmingham itself, where buildings and asphalt release heat through the night. Conversely, a frost hollow or a low-lying garden outside the city could be colder than the station reading. So while 9 May 2025 stands as the latest recorded frost at the station, a margin of caution for your own garden is advisable.
It is telling that the latest frost in this entire 35-year look-back is from 2025 — not from decades ago. The fact that 9 May 2025 saw a minimum of -0.3°C shows that the risk window is not just a historical curiosity; it extends into the current era. Many gardeners in the region now delay planting tender annuals until after the second week of May, and this dataset supports that caution. A frost on 9 May is extremely late, but it happened in the most recent spring measured.
The period analysed runs from 1 March 1991 to 31 December 2025, which captures 35 springs of data. Across all those years, no frost has ever been recorded in June, July, or August in this series — the average minimum temperatures for those months are 10.0, 11.9, and 11.9 respectively, well above freezing. The danger zone is firmly within March, April, and May.
If you are planning to plant or protect blossom near Birmingham, these are the takeaways you can trust from the coton-in-the-elms records:
Waiting until the second week of May before placing tender plants outdoors, or keeping fleece covers at hand for the first ten days of May, is the conservative approach supported by these records. For the most careful gardeners, the message from 9 May 2025 is simple: do not let your guard down until mid-May has passed.
Source: Met Office MIDAS (Integrated Data Archive System), station at coton-in-the-elms, Derbyshire. Period analysed: 1991–2025. Data under Open Government Licence (OGL v3.0), archived at CEDA.
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© 2026 HistoClima · data: Met Office (OGL v3.0) · not affiliated with Met Office · citation permitted with source.