On Tuesday, at 28 days rain-free, San Francisco will enter the top 10 driest periods in recorded history. This will quickly accelerate on Friday, day 31 of our dry pattern, where San Francisco enters the top 5 driest stretches in recorded history.
At midnight it will be 18 days since our last measurable rainfall in San Francisco. How does that compare to historical dry spells? When it does finally rain again, where on the list will we end up? #CAwx pic.twitter.com/3Ad4Y7Ll6f— NWS Bay Area (@NWSBayArea) February 16, 2020
As we wrap up February on Saturday without any rain in the forecast, we will have gone the entire month without a drop of wet weather. This has only happened one other time in recorded history, more than a century and a half ago in 1864.
The longest San Francisco has ever gone without rain is 43 days. If we make it to March 11 of this year we will tie that record as well.