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Last updated: 20:00, 5 Oct 2026
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Croxley Green sits in Hertfordshire between Rickmansworth and Watford, with the Grand Union Canal and the River Chess running close by and the town's own large green at its centre. Rain arrives here from the south-west across the Chilterns fringe, and the canal and river both respond quickly to a heavy burst. This is exactly what a Croxley Green rain radar is built for: hyperlocal radar follows the cell in real time instead of averaging it away.
What makes rain hard to predict here is not the frontal bands rolling in from the south-west, which are routine, but the convective storms that grow out of warm ground and city heat. The Chilterns and North Downs help direct where these cells form and travel, and a single storm can drop enough water to overwhelm drainage in minutes even after a forecast called only a chance of showers. The Chilterns fringe just north of Croxley Green lifts approaching showers slightly, so the higher ground can catch a shower a little ahead of the canal and the green in the valley below.
The live rain map for Croxley Green, England, in RainViewer is built from Met Office radar, and each new scan appears on the map within minutes. The live map shows whether a shower has already crossed the Chilterns fringe or is still building over the Colne valley to the west.
October to January is dominated by band after band of frontal rain, with named storms adding wind on top. As the rain keeps falling, the Thames and its tributaries rise, and it is the roads, railways and low-lying streets that feel the effects first. Frontal rain arrives in repeated bands through autumn and winter, and the Grand Union Canal and the River Chess through Croxley Green rise after several days of wet weather.
Cold showers, hail and sun alternate in spring, and walks along the canal towpath are the plans most often caught out. Through February to April, cold showers, hail and sunny spells trade off quickly, and the small, fast-moving showers make this the hardest stretch of the year to forecast. Spring races, park events and weekend sport all carry the greatest exposure during this period.
Summer storms can build over the warm valley and catch outdoor plans within minutes. Heat builds over the built-up area and thunderstorms produce short, intense rain that floods roads and stations in minutes. Festivals, tennis and open-air events depend on the storm cell's track, which the radar shows before the sky changes.
The towpath beside the canal at Croxley Green has little shelter along its length. Watch the shower approach on the radar and decide whether to start the walk or wait.
The large village green at the centre of Croxley Green is fully exposed to a passing shower. Check the radar to see whether the cell will pass before the match or the picnic.
Commuters walking from Croxley station into the town can time the walk to a break between showers. Check the radar before leaving the platform.
The River Chess near Croxley Green can rise after heavy rain crossing the Chilterns fringe. Check the radar before heading down to the water.
RainViewer shows UK precipitation using data from the Met Office, the national weather service, which runs a network of C-band dual-polarization weather radars. The Met Office network also feeds the European OPERA composite, and the RainViewer map refreshes with each new scan, about every 5 minutes. From Croxley Green the map also covers Rickmansworth, Watford and Chorleywood.
The Grand Union Canal through Croxley Green can rise after heavy rain crossing the Chilterns fringe just to the north, sometimes while the green in the centre of town stays largely dry. Boaters and towpath walkers watch the wider area rather than the local sky. RainViewer shows the shower crossing the higher ground.
Yes, the local roads through Croxley Green towards Rickmansworth and Watford slow in heavy rain, and standing water can build at low points near the canal. Look at the map before setting off. RainViewer shows whether the cell is still to come or has already gone through.
Croxley Green has surface flooding on low roads near the canal and the River Chess after intense rain, and the valley sheds water more slowly than the higher ground nearby. Avoid low points in heavy rain. The radar shows whether more rain is crossing the Chilterns fringe.
May to September is the best window to visit Croxley Green, with the canal towpath and the village green at their best. Summer storms can still build quickly over the valley. The radar in the morning shows the best window for time outside.
The canal towpath at Croxley Green sits down in the valley where runoff from the Chilterns fringe collects, so it can be wetter underfoot while the green on slightly higher ground in the town centre stays drier. RainViewer draws each shower where it actually is, which is why a look at the canal towpath and the village green can give different answers.
A forecast for Croxley Green predicts rain with a probability, while RainViewer shows the rain the Met Office radar is measuring right now, with a new frame about every 5 minutes. Met Office dual-polarization radars separate heavy convective rain from lighter frontal rain, which matters here because the intense summer downpours are the ones that flood underpasses and stations. That hyperlocal radar view tells you what is happening on your street.
Set a rain alert on the canal towpath or the village green and RainViewer warns you before rain arrives. That lets you time a walk or a match. The 2-hour forecast in 5-minute slices shows the next gap, and saved locations track Rickmansworth and Watford together.
A walk along the canal and an afternoon on the green both depend on a dry gap, and RainViewer shows the next one.
Rain in Croxley Green arrives in bands from the south-west, and summer storms can appear within minutes.
Your phone forecast says rain in Croxley Green this afternoon. RainViewer's live hyperlocal radar shows the cell still crossing the Chilterns fringe with the green dry, which decides whether the match starts now.
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Slice the next two hours into 5-minute steps and pick the gap for the walk along the canal towpath.
An alert on the village green arrives while the rain is still on its way, and that decides whether to start the match now or wait for the shower to pass.
In Croxley Green the wet weather tends to come from the south-west, and the arrows show the track of every shower.
Scroll back over the Chilterns fringe to the north to see what actually fell overnight.
Track the canal towpath, Rickmansworth and Watford together and compare which one is dry.