Bergen records about 2250mm of rain across roughly 230 wet days a year, which is a 63% chance on an average day. September is the wettest month at 280mm (12% of the annual total) and May the driest at 120mm. Local rain type: steady rain. Bergen is one of Europe's wettest cities — rain gear is mandatory, not optional. Locals say "there's no bad weather, only bad clothing." Invest in a quality waterproof jacket over an umbrella, as wind makes umbrellas useless.
Chance of rain on an average day: 63%
Rainfall climatology for Bergen. 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 | 2250mm |
| Rain days per year | 230 |
| Odds on an average day | 63% |
| Wettest month | September — 280mm over 28 days |
| Driest month | May — 120mm over 12 days |
| Rain type | steady rain |
| Best dry window | May and early June offer the best chance of dry weather with long Nordic daylight hours. |
| Worst rain window | September through December brings relentless rain — Bergen averages 25+ rainy days per month in autumn. |
September delivers 133% more rain than May (280mm vs 120mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 12% of the annual total, so rain in Bergen is spread through the year — there is no season you can rely on being dry.
Bergen rain typically comes as discrete showers, so a compact umbrella and a flexible plan are usually enough.
Rain falls on about 28 days in September against 12 in May — 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 | 190mm | 19 | 63% | 5°C |
| February | 150mm | 15 | 50% | 5°C |
| March | 170mm | 17 | 57% | 7°C |
| April | 130mm | 13 | 43% | 10°C |
| May | 120mm | 12 | 40% | 13°C |
| June | 130mm | 13 | 43% | 16°C |
| July | 170mm | 17 | 57% | 18°C |
| August | 210mm | 21 | 70% | 18°C |
| September | 280mm | 28 | 93% | 16°C |
| October | 270mm | 27 | 90% | 13°C |
| November | 230mm | 23 | 77% | 10°C |
| December | 230mm | 23 | 77% | 7°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Bergen 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.
Bergen records rain on roughly 230 days a year — about a 63% chance on any given day — totalling around 2250mm.
September, with about 280mm over 28 rain days. That is 12% of the entire year's rainfall in a single month.
May is the driest month at 120mm across roughly 12 days. May and early June offer the best chance of dry weather with long Nordic daylight hours.
Bergen is one of Europe's wettest cities — rain gear is mandatory, not optional. Locals say "there's no bad weather, only bad clothing." Invest in a quality waterproof jacket over an umbrella, as wind makes umbrellas useless.
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.