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.
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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.
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Duncton gets about 996 mm of rain a year on average (wettest month November, 122 mm; driest May, 58 mm). That is close to the UK as a whole, which averages 1,163 mm a year. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 3.0 km away. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.
Reference
E10450
Source
Environment Agency
Coordinates
50.933357, -0.647317
County
West Sussex
Data from
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FloodRadar helper · beta