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Rainfall in Grangemouth

How much rain fell in Grangemouth, Falkirk? Daily, weekly and monthly totals averaged over the SEPA rain gauges within 15km, updated every 15 minutes.

The average of 3 rain gauges within 15km of the centre of Grangemouth's monitored area, all reporting in the last two days. This October they range from 73.2mm to 93.8mm. The nearest is Polmonthill STW, 0.0km away. Rain can be very local, so one street may differ from the average.
14.3mm
Yesterday (23 Oct 2026)
26.7mm
Last 7 days
84.3mm
October so far
11.3mm
Today so far (UTC)

Rain forecast

Next 24 hours: about 3.7mm of rain forecast for the area around Grangemouth, heaviest in the hour to 23:00 (1.1mm).

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).

Next 4 days

Daily totals for UK days from the same computer model; "dry" means under 0.2mm. Forecasts further ahead are less certain.

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⚠️ Yesterday's 13.6mm at Polmonthill STW was the wettest day at this gauge since 13 Oct 2026 and in the top 7.7% of 26 rain days in this gauge's very short record (short record — treat with caution).
⚠️ Yesterday's 13.2mm at Slamannan was the wettest day at this gauge since 13 Oct 2026 and in the top 5.9% of 34 rain days in this gauge's very short record (short record — treat with caution).
⚠️ Yesterday's 16.0mm at Whitburn was the wettest day at this gauge since 30 Sep 2026 and in the top 5.6% of 36 rain days in this gauge's very short record (short record — treat with caution).

Nearest rain gauges to Grangemouth

GaugeDistanceYesterday7 daysOctoberToday
Polmonthill STW 0.0km 13.6mm 26.4mm 73.2mm 10.2mm
Slamannan nr Slamannan 11.3km 13.2mm 25.6mm 85.8mm 12.4mm
Whitburn nr Whitburn 14.0km 16.0mm 28.2mm 93.8mm 11.4mm

Last 30 days (average of 3 gauges within 15km)

Daily totals 24 Sep–23 Oct. Wettest day: 202.3mm.

Rain days this October

11 days with at least 0.2mm of rain so far this October at Polmonthill STW.

Rainfall year by year: eastern Scotland

The rain gauges near Grangemouth do not have a long enough daily record yet, so this is the Met Office series for the wider region.

Yearly rainfall 1986–2025, with the dashed line at the 1991–2020 average. Wettest: 2002 (1,441 mm). Driest: 2003 (841 mm). Source: Met Office HadUK-Grid areal series, Open Government Licence v3.0.

Average rainfall in Grangemouth

Grangemouth gets about 924 mm of rain a year on average (wettest month October, 100 mm; driest April, 50 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), 3.1 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.

Gauges and storm overflows around Grangemouth

Rain gauge River gauge Storm overflow

Rivers near Grangemouth

Nearest river gauges

A level is shown only when the gauge's latest reading is under 6 hours old. Distances are straight-line from the centre of Grangemouth's monitored area.

Storm overflows near Grangemouth

11 storm overflows within 5 km of the centre of Grangemouth's monitored area. None of the 9 with a live status is discharging right now, and 2 have no current status.

Sewage & storm overflows →

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: © Scottish Water, near-real-time Overflow Map data, open licence for reuse. EDM monitors indicate overflows; they do not confirm them, and this is not advice on water quality.

About Grangemouth

Grangemouth
Photo: Wikimedia Commons (author and licence on the file page)

Town in Scotland

Grangemouth is a town in the Falkirk council area in the central belt of Scotland. Historically part of the county of Stirlingshire, the town lies in the Forth Valley, on the banks of the Firth of Forth, three miles east of Falkirk, five miles west of Bo'ness and 13 miles (21 km) south-east of Stirling. Grangemouth had a resident population of 16,016 in 2022, indicating a decrease from the 2011 census, being 17,373.

From Wikipedia, the free encyclopedia (CC BY-SA 4.0).

Frequently asked questions

How much rain fell in Grangemouth yesterday?

14.3mm of rain fell yesterday (23 Oct 2026), from the average of 3 rain gauges within 15km of Grangemouth.

Is this month wetter than normal in Grangemouth?

October so far: 84.3mm, from the average of 3 rain gauges within 15km of Grangemouth. There is not yet enough history to compute a reliable October average.

Where is the nearest rain gauge to Grangemouth?

Polmonthill STW is the nearest rain gauge, 0.0km from the centre of Grangemouth's monitored area. Rain gauges can be several kilometres from the town itself, so very local downpours may not register exactly.

Rainfall data: SEPA 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 Grangemouth's monitored area — local rainfall can vary over short distances.