27 Might 2024, Memorial Day
Pittsburghers used to have a practice that Memorial Day was the beginning of outside tomato planting season. However if you happen to develop tomatoes right this moment you realize that’s not the case. You in all probability planted them weeks in the past.
Simply 50 years in the past Pittsburgh had an annual common minimal temperature of -10 to 0 levels F and people numbers didn’t change ten years after this USDA map was produced in 1960.
However the local weather is altering quickly now. Final 12 months USDA formally revised their Hardiness Zones as proven on the 2023 map under.
The Pittsburgh space shifted a 1/2 zone hotter in eleven years. Discover the paler shade within the river valleys in Allegheny County on the zoomed map under. Our common annual lowest temperature was once -5° to 0°F nevertheless it jogged 5 levels hotter. Now it’s 0° to five° F.
None of this can be a shock. We had been actually felt sizzling in April, the warmest on file.
