FloodRadar
Log inCreate free account
FloodRadar
Log inCreate free account
Coverage shows valid readings received out of the expected 15-minute observations. Gaps may understate rainfall and are not treated as dry weather.
Water fills show relative rainfall, not flood risk. Hourly cards use rainfall intensity; 24 hours uses recorded wet-day percentiles; longer totals use estimated seasonal pace for the elapsed period. Grey means there is insufficient coverage or history for a comparison.
Choose a layer to see recorded events alongside the chart.
Explore recorded river changes and compare events after drier or wetter weeks.
Comparisons use complete past observations, including events with little rise. Ground wetness is estimated from preceding rainfall.
Loading the annual rainfall comparison…
Greater London gets about 627 mm of rain a year on average (wettest month October, 70 mm; driest March, 38 mm). That is 46% drier than the UK as a whole, which averages 1,163 mm a year. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 1.5 km away. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.
FloodRadar helper · beta