Only 3.2mm of rain fell at Gogarbank and 4mm in the Botanic Gardens - 7% and 10% of the respective monthly average.
According to data from the Met Office Midlothian, Fife and Middlesex, were the driest historical counties this month with just 12% of the rainfall expected in April.
Sutherland was the wettest part of Scotland with 36% above average.
The UK as a whole experienced just 47% of the expected rainfall.
Scotland was the wettest area of the UK with 65mm and southern England the driest area with 16mm.

Imtiaz Ul Haq, 58, suffered serious knife wounds to his throat during the attack at the Costcutter convenience store in Queensferry on 8 December
At Mold Crown Court on Monday, Matthew Liam Whelan, 29, from Mancot, denied attempted murder but admitted both wounding with intent and robbery.
Leslie Peter Baines, 47, of Connah's Quay, denies the robbery charge.
A trial date has been set for 22 May, however the prosecution has been asked to consider if it wishes to proceed with an attempted murder charge against Whelan or accept his guilty plea to the other offence.
Both men were remanded in custody ahead of a pre-trial hearing in April.
Edinburgh was the driest place in the UK in April despite Scotland as a whole being the wettest.
[NEXT_CONCEPT]
A man accused of trying to kill a Flintshire shopkeeper in a robbery has admitted a wounding charge.