Weather in Hamburg in September

A good month. September is a solid month to be in Hamburg. Highs average 19.1 °C, lows 10.2 °C, and rain falls on 12 days — nothing in the month is working against you.

September ranks 2 of 12 in Hamburg. Only June scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 12 days, 1 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average September reaches 30 °C. Across the twenty years measured, the hottest September day reached 28.7 °C and the coldest night fell to 3.8 °C, and the wettest single day dropped 31 mm — roughly 53% of the month's rain in one day.

September is moderately variable: 26 mm in the driest year against 161 mm in the wettest, around an average of 58 mm. Roughly two Septembers in three land near that average, and the third does something else entirely.

Wind is light at 10.4 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 82%, high enough to notice on the warm days without dominating them.

How September sits in the year

The month is on the way down: 3.4 °C cooler than August, with October dropping another 5.2 °C. The first week and the last are not the same trip.

Daylight in September

12.8 hours of daylight, losing 2.1 hours across the month. That is between Hamburg's extremes of 17 and 7.5 hours, so days are long enough not to constrain the plan.

An inland climate

Despite being inland, the year stays fairly even: 24.3 °C between the year's warmest afternoons and coldest nights.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

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

September in Hamburg versus nearby

If Hamburg is one option among several, the nearby comparison is worth making. Bielefeld is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Groningen is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: September is effectively as good as it gets here — 1 points behind June, which is inside the margin where the weather stops being the deciding factor and price starts being it.

Every month in Hamburg

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