Swelter

Keeping British homes liveable in the heat

Town data

Norwich

Norfolk

1.0 more hot days a year every decade, across 1951 to 2025.

The numbers

Warmest day in this series
33.8 °C 2026-06-26
Hot days, this decade so far
10.2 a year on average
Daily readings behind this page
27,963 1950 to 2026

Hot days a year

A hot day here is the Met Office summer days index: a day whose maximum goes above 25  °C. Above, not reaches, because the published definition says exceeds, so a day landing exactly on the figure is not one. Part years are left out, so the current year does not appear.

1951: 1 days 1952: 4 days 1953: 1 days 1954: 0 days 1955: 3 days 1956: 0 days 1957: 4 days 1958: 0 days 1959: 7 days 1960: 1 days 1961: 6 days 1962: 0 days 1963: 0 days 1964: 3 days 1965: 0 days 1966: 0 days 1967: 3 days 1968: 2 days 1969: 3 days 1970: 2 days 1971: 0 days 1972: 0 days 1973: 2 days 1974: 0 days 1975: 12 days 1976: 13 days 1977: 0 days 1978: 0 days 1979: 0 days 1980: 1 days 1981: 0 days 1982: 3 days 1983: 6 days 1984: 4 days 1985: 1 days 1986: 2 days 1987: 1 days 1988: 0 days 1989: 8 days 1990: 14 days 1991: 1 days 1992: 2 days 1993: 0 days 1994: 10 days 1995: 14 days 1996: 4 days 1997: 12 days 1998: 1 days 1999: 6 days 2000: 2 days 2001: 3 days 2002: 9 days 2003: 7 days 2004: 3 days 2005: 6 days 2006: 15 days 2007: 0 days 2008: 0 days 2009: 3 days 2010: 7 days 2011: 4 days 2012: 2 days 2013: 6 days 2014: 3 days 2015: 4 days 2016: 9 days 2017: 5 days 2018: 13 days 2019: 12 days 2020: 11 days 2021: 2 days 2022: 18 days 2023: 7 days 2024: 6 days 2025: 17 days
1951 18 days at the peak 2025

By decade

Decade Complete years Hot days a year Tropical nights a year
1950s 9 2.2 0.0
1960s 10 1.8 0.0
1970s 10 2.9 0.0
1980s 10 2.6 0.0
1990s 10 6.4 0.1
2000s 10 4.8 0.0
2010s 10 6.5 0.3
2020s 6 10.2 0.5

tropical nights show no meaningful change across 1951 to 2025. A tropical night here is the Met Office tropical nights index: a night whose minimum stays above 20  °C. It is the figure that decides whether a bedroom cools down at all overnight.

Warmest days in this series

These come from a reanalysis grid roughly 11 km across, not from a thermometer in Norwich. A grid cell is an average over its whole area, so its peak reads lower than the highest reading a single weather station recorded the same day. The shape of the record is sound. Treat the individual figures as the area, not the hottest corner of it.

  1. 33.8 °C 2026-06-26
  2. 33.2 °C 2022-07-19
  3. 32.1 °C 2022-07-18
  4. 30.7 °C 2003-08-10
  5. 30.6 °C 2018-07-27
  6. 30.5 °C 2019-07-24
  7. 30.4 °C 1983-07-15
  8. 30.4 °C 2020-08-07
  9. 30.3 °C 1990-08-03
  10. 29.9 °C 1957-06-30

Daily readings from the Open-Meteo historical weather archive, licensed CC BY 4.0. The data has been processed: readings were validated, stored, and summarised into the counts and averages shown here. The thresholds behind those counts are the Met Office ones, not this site's own. The series is ERA5-Land, one reanalysis model throughout, so nothing here spans a change of dataset partway along.