Doing a little research about last frost dates here. I went through my notes and old posts here and found the following frosts/freezes after our zone 6 average last frost date of 4/15. Not a comprehensive list, just ones I made note of:
4/30/2011
4/22/2013
5/10/2014
5/9/2020
4/19-4/21/2021
4/19/2022 (31 degrees)
Here's a distribution of last frost dates I found for zone 6, where most of us are. So, average = 50% = 4/15. 70% chance you're good tomorrow or later, and 90% on 4/30 or later.
Frost
50%
40%
30%
20%
10%
5%
1%
Last
4/15
4/18
4/21
4/25
4/30
5/4
5/13
First
10/23
10/20
10/17
10/13
10/9
10/5
9/29
That frost on 5/9/2020 above was <5% chance.
Peas, spinach, beets, carrots, radishes and Swiss chard are in the ground. Tomatoes, peppers, basil and about ½ the lettuce are under lights. 10 day forecast looks good, but based on the history here, and a little more patience about these things lately, I may wait a couple more weeks.