Climate in Kassel
Rainy season: There is no special rainy season
Avg. Temp. in Spring: max.: 7 – 18°C ( 45 - 64°F ); min: 0 - 7°C ( 32 - 44°F )
Avg. Temp. in Summer: max.: 21 – 22°C ( 70 - 72°F ); min: 10 - 12°C ( 50 - 52°F )
Avg. Temp. in Autumn: max.: 6 – 18°C ( 43 - 64°F); min: 1 - 8°C ( 34 – 47°F )
Avg. Temp. in Winter: max.: 2 – 3°C ( 36 - 48°F); min: -1 - 0°C ( 30 - 32°F )
Explore the Karlsaue and Fuldaaue!
Kassel is well-known to be one of the greenest cities in Germany. 62 % of its area are parks, forests or gardens! If you are in the centre of Kassel (i.e. the Koenigsstrasse), you should not miss exploring the nearby baroque park Karlsaue. It's only some 300m away. Cross the Friedrichsplatz and pass by the Fridericianum (an interesting museum, btw), cross the Steinweg road and follow the paths towards what looks like a giant picture frame - it's a piece of art from a documenta years ago. From this frame, you can get a first glimpse on the Karlsaue. Go down the stairs and you'll see a big yellow building, Kassel's orangery. Next to the building is the marble bath. Inside, you'll find a planetarium, which is really interesting. If you stand in front of the orangery, you'll see a vast meadow, the so-called Karlswiese. In summertime, it's full of people playing football or badminton, or just having a picnic. From the Karslwiese, two long ditches extend towards a beautiful lake. Stroll along these ditches, it's a nice walk. When you've reached the lake, go on further until you come to another lake with an island in the middle. The island is called Siebenbergen, and it's especially beautiful in spring, when it's full of flowers.
Now turn to the left and cross the street until you reach the river Fulda. Look for the bridge and cross it. You now reach the Fuldaaue, another big park. It's been the main site of the 1955 Bundesgartenschau (i.e. a garden exhibition -I believe it was in 1955). Today, it's a good place to spend your evening with a barbecue or a swim in one of the lakes. There's also a sports area on the river, where rowing and other water sports are possible.
By the way, in summertime every Tuesday evening the parks are full of inline-skaters as there's an organized skating circuit once a week.