There’s more to it than it says on paper (or online in this case). You could have a totally dry month(s) followed by a couple of days of heavy rainfall, making it look like you’ve had average rainfall for the month.
The reality on ground is that this won’t really change things. Runoff is a factor as the soil would be bone dry, so the ground and plants cannot take advantage of this.
A steady, but in no means a washout, pattern of rain is much more useful than weeks upon end of boiling weather, followed by a deluge at the end of it.