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All rainfall gauges

Dyffryn Isaf Llantrisant Raingauge

Rhondda Cynon Taf
Not raining
0mm/hr
Rate, hour to 16:30
Updated 36 min ago
No rainfall was recorded in the hour to 16:30. October has 256.4 mm recorded so far. Observations are incomplete, so a comparison with usual rainfall up to today is unavailable. Recent ground conditions are saturated — even moderate new rainfall could matter.
0
mm/hr
not raining · to 16:30
Dry
0
1 hour
mm
50% coverage
Observed total
2.8
6 hours
mm
91% coverage
Observed total
7
24 hours
mm
97% coverage
Observed total
172.2
7 days
mm
99% coverage
Observed total
256.4
Oct
mm
Observed total
387.4
2026
mm
Observed total

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.

29.0 mm on 26 Oct 2026 was the wettest day at this gauge since 24 Oct 2026 and in the top 2.9% of 35 rain days in this gauge's very short record (short record — treat with caution).
Ground Wetness
Antecedent conditions based on recent rainfall
100
Saturated
of 100
DryNormalDampWetSaturated
52.8mm
3d
172.2mm
7d
188.4mm
14d
269.6mm
30d
Conditions are saturated. Even light rainfall is likely to run off quickly and contribute to river rises. Antecedent Precipitation Index with exponential decay. Decay rate adjusted for transitional conditions (K=0.92).
24h Weather Forecast
Precipitation -12h / +12h
Rainfall → River Response
Detecting lag...
Shows how rainfall at this gauge translates to river level changes over time. The lag between peak rain and peak river helps predict downstream impact.
Events on this timeline About El Niño

Choose a layer to see recorded events alongside the chart.

Events in this view (0)
    How nearby rivers respond to rainfall here
    Estimated response characteristics based on distance and catchment
    Based on historical data analysis and proximity. This is not an official flood forecast or warning.
    What happened after similar rainfall?

    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.

    Recent Rainfall Events
    Detected storm events from continuous readings
    Historical Context
    Records, anomalies, and comparisons
    Nearby River Gauges
    Nearby Rain Gauges

    Loading the annual rainfall comparison…

    Monthly Overview
    Monthly rainfall totals with historical normal range

    This area gets about 1,553 mm of rain a year on average (wettest month December, 181 mm; driest April, 88 mm). That is 34% wetter than the UK as a whole, which averages 1,163 mm a year. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 2.4 km away. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.

    Nearby storm overflows
    Water-company event-duration monitors within 3 km of this rain gauge
    Loading nearby overflows…

    Loading recent reported spill starts…
    Location

    Reference
    NRW_H057491054

    Source
    Natural Resources Wales

    Coordinates
    51.5542, -3.4021

    County
    Rhondda Cynon Taf

    Data from
    -

    See the previous version of this page