Bath records about 700mm of rain across roughly 130 wet days a year, which is a 36% chance on an average day. December is the wettest month at 75mm (11% of the annual total) and February the driest at 50mm. Local rain type: drizzle. Bath drizzles frequently but rarely gets drenched — rainfall is evenly spread across the year. A compact umbrella is your constant companion, but showers rarely last more than an hour.
Chance of rain on an average day: 36%
Rainfall climatology for Bath. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Last updated: · Live forecast data refreshes hourly.
| Annual rainfall | 700mm |
| Rain days per year | 130 |
| Odds on an average day | 36% |
| Wettest month | December — 75mm over 13 days |
| Driest month | February — 50mm over 9 days |
| Rain type | drizzle |
| Best dry window | April and May offer the driest weather combined with spring blooms in the Royal Victoria Park. |
| Worst rain window | December is the wettest month, but Bath's Christmas market and festive lighting make it worthwhile. |
December delivers 50% more rain than February (75mm vs 50mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 11% of the annual total, so rain in Bath is spread through the year — there is no season you can rely on being dry.
Bath rain is mostly persistent drizzle, where a waterproof shell beats an umbrella.
Rain falls on about 13 days in December against 9 in February — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 70mm | 12 | 40% | 8°C |
| February | 50mm | 9 | 30% | 8°C |
| March | 55mm | 10 | 33% | 10°C |
| April | 50mm | 9 | 30% | 13°C |
| May | 55mm | 10 | 33% | 17°C |
| June | 55mm | 10 | 33% | 20°C |
| July | 55mm | 10 | 33% | 22°C |
| August | 65mm | 12 | 40% | 22°C |
| September | 60mm | 11 | 37% | 20°C |
| October | 70mm | 12 | 40% | 17°C |
| November | 70mm | 12 | 40% | 13°C |
| December | 75mm | 13 | 43% | 10°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Bath we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Bath records rain on roughly 130 days a year — about a 36% chance on any given day — totalling around 700mm.
December, with about 75mm over 13 rain days. That is 11% of the entire year's rainfall in a single month.
February is the driest month at 50mm across roughly 9 days. April and May offer the driest weather combined with spring blooms in the Royal Victoria Park.
Bath drizzles frequently but rarely gets drenched — rainfall is evenly spread across the year. A compact umbrella is your constant companion, but showers rarely last more than an hour.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.