The hottest, coldest, wettest and snowiest days Thetford has
recorded — the outer limits of what its weather can do, and how far
they sit beyond a normal day.
Based on 26 years of daily weather observations (1999–present), from the Lakenheath Raf station 12 km away. Updated through August 2025 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.
The four kinds of extreme
The hottest, coldest, wettest and snowiest single days Thetford
has recorded — each shown against what a normal day that time of year
looks like.
🔥Hottest day
102°FJul 19, 2022
The three most extreme on record
1102°FJul 19, 2022recent
2100°FJul 18, 2022
399°FJul 25, 2019
❄️Coldest night
6°FFeb 11, 2012
The three most extreme on record
16°FFeb 11, 2012
212°FFeb 12, 2012
313°FJan 8, 2010
🌧️Most rain in one day
4.78 inFeb 2, 2009
The three most extreme on record
14.78 inFeb 2, 2009
24.57 inJan 29, 2009
34.53 inJan 11, 2007
In plain terms
Across the record, Thetford has reached as high as 102°F and as low as 6°F. A single day has delivered over 5 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Marham, a weather station, about 29 km from the city centre. The underlying daily records come from NOAA's global station network.