On Kepler Bb these are the average temperature and duration in region 1 which is a warm temperate zone(subtropical if you want to call it that):
Temp: 35 degrees Fahrenheit (2° C) Duration: 90 Kepler Bb days or 120 Earth days
Temp: 65 degrees (20° C) Duration: same as winter
Temp: 85 degrees (30° C) Duration: same as spring
Temp 60 degrees (15° C) Duration: same as summer
Now that is just taking temperature and duration of seasons into consideration.
cloudy winter -> rainy spring -> sunny summer -> mixed fall
Of course not all days in the cloudy winter are cloudy and the mixed fall isn't a 1:1:1 ratio.
Now in region 1 there is a lot of prairie grassland:
There is also quite a bit of deciduous forest:
There is 1 main river with a branch that leads to a lake.
And this is all in an 200 mile radius. (320 km)
There is even a mountain range.
Now how extreme would this likely get? I know that it could get more extreme like a complete drought near the river(which I know is not likely because this river leads into the ocean) but I am assuming that I am not considering the really unlikely scenarios like arctic weather or complete drought.
Area in question:
The area in question is mostly grassland with a forest close by where Lisa often hunts for deer. The forest itself is pretty dense and some of the trees are old enough that if they wanted to, Lisa and Robin could live in the trees. However Lisa and Robin are of a humanoid species that prefers to live on the surface and underground so their shelter is surrounded by grassland. I know that grasslands tend to have a wet and dry season whereas most temperate forests don't whether you are talking about the North American prairies or the African savannah both of which are grasslands with a wet season and a dry season.