Weather in Bergen in September

A hard month. September is a hard month in Bergen, and worth planning around. You should expect rain on 22 days of the month, which is more days wet than dry.

September ranks 4 of 12 in Bergen: past the worst of the year but short of July, which is the month to book if the dates are open.

Rain on 22 of the month's 30 days, 10 of them heavy. At that frequency a wet-weather backup is not a contingency, it is the itinerary — book the indoor things first and treat the clear days as the bonus. Layers, and a genuinely waterproof outer — at 14.9 °C the difference between a good day and a miserable one is entirely down to what you are wearing.

What the averages hide

Averages flatten a month, and this one hides a few things: the day barely swings — 5.3 °C between the overnight low and the afternoon high. Across the twenty years measured, the hottest September day reached 26.9 °C and the coldest night fell to 2.9 °C, and the wettest single day dropped 79 mm — roughly 29% of the month's rain in one day.

September is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest September on record still delivered 503 mm against 84 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 269 mm average is a reasonable planning figure, not a promise.

Wind is light at 4.9 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 88%, which at 14.9 °C means damp rather than muggy — the kind of cold that gets into a coat and stays there.

How September sits in the year

The month is on the way down: 3.7 °C cooler than August, with October dropping another 4.8 °C. The first week and the last are not the same trip.

Daylight in September

13 hours of daylight, losing 2.7 hours across the month. That is between Bergen's extremes of 19 and 5.8 hours, so days are long enough not to constrain the plan.

An inland climate

Despite being inland, the year stays fairly even: 21.8 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Busy. Popular without being frantic; book the things you care about, improvise the rest.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

September in Bergen versus nearby

If Bergen is one option among several, the nearby comparison is worth making. Stavanger is close enough to be a coin toss — within a degree on temperature, 3 days less rain. Kristiansand is close enough to be a coin toss — within a degree on temperature, 7 days less rain.

So: September works, with July the better month by 13 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Bergen

See all twelve months in Bergen, or where else to go in September.