Unlikely to be “hot” which is nice because many airbnb’s don’t have A/C. Most likely this time of year it will be mild and nice, but has potential to be cold and miserable as fuck. Just be sure to check the forecast leading up till when you leave so you can pack for contingencies. I went late March 2018 and it was very nice, sunny with highs between 15-20 Celsius (60-68 F). Just about perfect weather for walking many miles per day (which we preferred). Zero bugs in that climate. Went back last year over a ~10 day period late March to early April, and it was everything from the same mild and sunny all the way down to one day when it fucking snowed, sleeted, wind was howling, and that was in Paris. Apparently Paris hadn’t had snow in years. When we went to Normandy the next day and got to pointe du hoc the wind was blowing 35mph with 50+ gusts and we got sprayed from the crashing waves…which oh btw are at the top of 100+ foot high cliffs. Temps were about 5 Celsius before wind chill factored in. Awesome place though and worth it no matter the weather. I love France.