Verb conjugation of "stagnieren" in German

Since my wife is pregnant, we must postpone the trip until tomorrow. I am back again in Poland in June and then I would be very happy to meet you. I will email the exact dates a little later.
How is the weather in Hamburg? We have 15 degrees and some sunshine here in the south. I have some remarks on your mail. If you write again and if you wish, I can correct your spelling mistakes.
You need to call before you leave... When there is good weather outside all restaurants open outside and the people sit in the sun, eat and drink. The lake is also very romantic in the late night.