Weather in Krakow in September

How September compares

September is the 4th warmest month of the year in Krakow and ranks 132nd of 134 destinations we compare for September - see where else is hot in September. Against London's average high of 18.6°C in September, Krakow is 0.1°C warmer by day and 1.0°C cooler at night.

Daytime and night-time in September

The typical September day in Krakow peaks at 18.7°C, but that is an average: the warmest 10% of days reach 24.2°C or more. Roughly 1 in 14 days top 25°C and 1 in 333 pass 30°C. Nights average 10.2°C; one night in ten drops to 6.1°C or lower, so pack a layer for evenings - it is genuinely cool after dark. Between 1991 and 2020 the hottest September day here reached 34.0°C (2015-09-01) and the coldest night 2.5°C (1993-09-30).

Rain in September

Wet (more than 8 rainy days): about 11 days with 1 mm or more, 74 mm in total. Year to year it varies a lot - the wettest September was 2017 with 208 mm, the driest 2011 with 15 mm. Humidity averages 77%.

Sunshine and daylight

Around 4.8 hours of sunshine a day (estimated from cloud cover), 12.3 hours of daylight: the sun rises about 06:16 and sets about 18:55 local time in mid-September. Average cloud cover is 61%.

Is September a good time to visit Krakow?

September is not the strongest month here: mild days and frequent rain. The best months for Krakow on our scoring are August, July, June.

Comfortable days, cooler evenings

The daytime average suits walking around without planning your day around intense heat. A light layer over a T-shirt gives you flexibility, while a warmer jumper or jacket makes sense if you expect to stay out after dark. There can still be warm spells: the warmest 10% of days reach 24.2°C or more, but that is not the temperature to build your packing around. At the cooler end, the coldest 10% of nights fall to 6.1°C or below. September therefore suits travellers who prefer mild days and do not mind wrapping up in the evening, rather than anyone seeking a reliably warm break.

Allow for rain, not just grey skies

Rain is the main compromise, so leave room to rearrange outdoor plans rather than committing every day to being outside. A waterproof jacket and shoes that cope with wet pavements are sensible packing choices. About 4.8 hours of sunshine within 12.3 hours of daylight means there is useful daylight for exploring, but you should not expect it all to be sunny. The rainy-day average does not tell you how long each wet spell will last, so it is not a reason to write off whole days. September works best if you are comfortable switching between time outdoors and shelter when needed.