mushy strawberries

I know this sounds weird but we have mushy strawberries. We think it is because they are not getting enough sunlight. I know I said that we have about 23 hours of daylight but it has been overcast a LOT lately and I think that might have something to do with it. It is not because they are overripe either because I picked them and ate them as soon as they got ripe. Does any one have any suggestions?