Updated: 2026-07-31
On the night of 26 July 2019, Holbeach-no-2 recorded its only tropical night in the entire 1988–2025 period. A tropical night is defined as a day when the minimum temperature does not drop below 20 °C. That single night — 1 daylongest consecutive run of tropical nights — stands as the station's absolute record. No other night in the station's history has ever reached that threshold, making 26 July 2019 a unique date in the local climate record.
To put this in context: Holbeach-no-2, a Met Office weather station on the flat Fenland landscape of Lincolnshire, is not a place where tropical nights come easily. Summer nights here typically cool off quickly after sunset, a pattern that reflects the station's inland, low-lying position. On 26 July 2019, however, the atmosphere stayed unusually warm — so warm that the minimum temperature never fell below 20 °C throughout the entire night. That single occurrence is the only time this has happened since daily records began at the station on 2 November 1988.
A tropical night is a meteorological term used when the minimum temperature remains at or above 20 °C. It is a common benchmark in Mediterranean and subtropical climates, but along England's east coast it is a rare event. For a station like Holbeach-no-2, with daytime sea breezes and open skies at night, reaching 20 °C at the lowest point of the daily cycle signals an exceptional air mass — usually a warm, humid plume from the south or southeast, often in the wake of a heatwave.
The record at Holbeach-no-2 is therefore not about a long sequence of warm nights — it is about the rarity of a single night meeting the threshold. While other stations in the UK, especially in urban areas or further south, can string together several tropical nights in a row, this Fenland location has only ever managed 1 day at a time. That single night on 26 July 2019 is both the longest and the only tropical night in the entire dataset.
The following table lists the longest consecutive runs of tropical nights recorded at the station, based on the complete daily series from 2 November 1988 to 31 December 2025. As you can see, the list is short — and both entries are single-night events.
| Start date | End date | Consecutive nights |
|---|---|---|
| 2019-07-26 | 2019-07-26 | 1 |
| 1995-07-29 | 1995-07-29 | 1 |
The two dates are separated by 24 years — 29 July 1995 and 26 July 2019. Both were single, isolated nights. Neither developed into a sustained warm spell at the station's location. The fact that no other tropical night has been registered in the 37 years of records (from late 1988 through the end of 2025) tells you how demanding the 20 °C threshold can be in this part of Lincolnshire.
Both tropical nights at Holbeach-no-2 occurred in July — on 29 July 1995 and 26 July 2019. July is climatologically the warmest month of the year in the UK, when daytime maxima are at their highest and nights are shortest. Even so, the minimum temperature on both nights stayed above 20 °C — a feat that the station has not repeated at any other time of the year, including during the notable warm summers of the 2000s and 2010s.
The absence of tropical nights before 1995 and after 2019 is not a data gap — the station has continuous daily records throughout the 1988–2025 window. It simply means that the minimum temperature never reached 20 °C on any other night in that 37-year span. Zero is a real number here: it indicates that no other night met the threshold.
The records come from Holbeach-no-2, a station operated by the Met Office as part of the UK's national weather observation network. The data are stored in the MIDAS (Met Office Integrated Data Archive System) database, which is the authoritative archive of UK weather observations. The station code used in the archive is 00395, and the data used here cover the period from 2 November 1988 (the earliest available record) through 31 December 2025 (the most recent).
For each day in that period, the daily minimum temperature was examined. A tropical night was recorded when the minimum temperature was equal to or greater than 20 °C. The consecutive runs were then identified using a standard gaps-and-islands approach — grouping adjacent days that meet the threshold into distinct streaks. The longest such streak at Holbeach-no-2 is the 1 day of 26 July 2019.
| Date | Consecutive nights | Rank |
|---|---|---|
| 2019-07-26 | 1 | 1 |
| 1995-07-29 | 1 | 2 |
Because both runs lasted exactly 1 day, the ranking above is based on the chronological order — the most recent occurrence (2019) is listed first. They are tied in duration, so neither one can be called longer than the other. The 2019 event is the most recent and therefore the standing record holder, but the 1995 event remains equally significant as the only other example in the station's history.
If you are planning outdoor events or travel to the Holbeach area in summer, it is worth knowing that tropical nights are essentially unheard of here. The station's longest warm spell at night has never exceeded a single night in nearly four decades of measurements. For comparison, many stations in southern England or along the south coast have recorded tropical nights in consecutive runs of several days during major heatwaves — but Holbeach-no-2 has never reached that level of persistence.
This is consistent with the local climate: Holbeach sits low and close to the Wash, where frequent onshore breezes moderate night-time temperatures. The warmest nights typically occur when the wind turns southerly, but even then, the open and flat terrain allows efficient radiative cooling after nightfall.
The answer to the question is clear: the longest consecutive run of tropical nights at Holbeach-no-2 is 1 day, recorded on 26 July 2019. The only other tropical night ever measured at this station occurred on 29 July 1995, also a single night. In 37 years of records, the station has never managed two tropical nights in a row — and the 2019 event remains the station record, unbroken as of the end of 2025 data.
Source: Met Office MIDAS (Met Office Integrated Data Archive System), official UK national weather station network. Station: Holbeach-no-2. Period: 1988–2025.
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