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How much rain fell in North Mymms, Hertfordshire? Daily, weekly and monthly totals averaged over the Environment Agency rain gauges within 15km, updated every 15 minutes.
Next 24 hours: about 2.8mm of rain forecast for the area around North Mymms, heaviest in the hour to Tue 06:00 (1.9mm).
A computer model forecast (DWD ICON) for a square about 15 km across, updated 17:05 UK time. It is a forecast, not a measurement, and not a Met Office forecast. Weather data by Open-Meteo (CC BY 4.0).
Daily totals for UK days from the same computer model; "dry" means under 0.2mm. Forecasts further ahead are less certain.
| Gauge | Distance | Yesterday | 7 days | October | Today |
|---|---|---|---|---|---|
| Rainfall gauge nr North Mymms | 0.0km | 0.0mm | 50.0mm | 69.8mm | 3.8mm |
| Rainfall gauge nr St Albans nr St Albans | 6.2km | 0.0mm | 50.6mm | 67.2mm | 3.6mm |
| Rainfall gauge nr Hatfield nr Hatfield | 6.5km | 0.0mm | 45.8mm | 63.5mm | 3.2mm |
Daily totals 26 Sep–25 Oct. Wettest day: 19.1mm.
17 days with at least 0.2mm of rain so far this October at Rainfall gauge nr North Mymms, against a full-month average of 17.5 rain days (based on 2 months of records at this gauge).
2026 so far: 443 mm (1 Jan to 25 Oct), against 509 mm by the same date in an average year (2000–2025) — 13% drier.
One bar per calendar year, the average of 8 local rain gauges: the Environment Agency's quality-checked daily archive, then live telemetry for the latest months. Wettest: 2000 (913 mm). Driest: 2005 (452 mm). Average: 659 mm a year.
Daily totals are the average of 8 local rain gauges, for UTC days; one gauge can catch much more than the average. A storm's figure adds up the rain measured on its dates, from our list of Met Office named storms and major floods — other weather on those days counts too.
North Mymms gets about 685 mm of rain a year on average (wettest month November, 74 mm; driest March, 41 mm). That is drier than the UK as a whole, which averages 1,163 mm a year.
Monthly averages in mm. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 1.4 km from the town's gauge centre. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0. UK comparison: Met Office HadUK-Grid areal series, 1991-2020, Open Government Licence v3.0.
Rain gauge River gauge Storm overflow
Nearest gauge on it: Waterhall, 9.2 km away: 0.17 m Steady.
Every gauge on the River Lee →A level is shown only when the gauge's latest reading is under 6 hours old. Distances are straight-line from the centre of North Mymms's monitored area.
1 storm overflow within 5 km of the centre of North Mymms's monitored area. The 1 with a live status is not discharging right now.
Event Duration Monitors show when an overflow may be spilling; they do not confirm it, and this is not advice on water quality. A live status older than two hours counts as no current status. Live status: © Thames Water storm overflow activity data, licensed under CC BY 4.0. Annual spill figures: Environment Agency Event Duration Monitoring return, © Environment Agency copyright and/or database right, Open Government Licence (OGL) v3.0.
Village and civil parish in Hertfordshire, England
North Mymms is a civil parish in the Welwyn Hatfield district, in the county of Hertfordshire, England. At the 2011 Census the civil parish had a population of 8,921.
From Wikipedia, the free encyclopedia (CC BY-SA 4.0).
0.0mm of rain fell yesterday (25 Oct 2026), from the average of 8 rain gauges within 15km of North Mymms.
October so far: 75.7mm vs 66.2mm October average — 14% wetter (the average covers the whole month; we are 26 days in). Figures are the average of 8 rain gauges within 15km.
Rainfall gauge nr North Mymms is the nearest rain gauge, 0.0km from the centre of North Mymms's monitored area. Rain gauges can be several kilometres from the town itself, so very local downpours may not register exactly.
17 days with at least 0.2mm of rain so far this October at Rainfall gauge nr North Mymms, against a full-month average of 17.5 rain days.
2000 was the wettest year in the record since 2000, with 913 mm from the average of 8 local rain gauges, against an average of 659 mm a year. The driest was 2005, with 452 mm.
2 Oct 2020: 54.1 mm on average across 8 local rain gauges, and up to 64.6 mm at one of them. Records since 1 Jan 2000.
Rainfall data: Environment Agency rain gauges, synced every 15 minutes. Daily totals are computed overnight (UTC days); "today so far" is live. Gauge distances are straight-line from the centre of North Mymms's monitored area — local rainfall can vary over short distances.
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