Last frost date in Norristown, Pennsylvania
April 8
Average last frost in spring. In an early year (1 in 10) it's over by March 28; in a late year (1 in 10) it comes after April 23.
October 31
Average first frost in fall. 1 year in 10 it comes by October 14.
Source: NOAA U.S. Climate Normals 1991–2020, station Norristown (USC00366370), 0.9 miles from Norristown, elevation 62 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 28 | Apr 8 | Apr 23 |
| First frost in fall | Oct 14 | Oct 31 | Nov 12 |
Frost-free days in an average year: 203
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | Apr 22 | Oct 20 |
| Frost (32°F) | Every year | Apr 8 | Oct 31 |
| Hard freeze (28°F) | Every year | Mar 31 | Nov 10 |
Nights at 32°F or colder in an average year: 107
What to plant now in Norristown
- Corn saladSept 15 – Nov 1Now
- Upland cressSept 15 – Nov 1Now
- Rhubarb plantsNov 1 – Dec 1Soon
- Asparagus plantsNov 15 – Jan 1Soon
- Spring planting calendar for an average last frost around April 10 Norristown: April 8
- Fall planting calendar for an average first frost around October 30 Norristown: October 31
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.
Nearby in Pennsylvania
- Lansdale 9 mi · last frost Apr 11
- Phoenixville 10 mi · last frost Apr 18
- Philadelphia 13 mi · last frost Mar 30
- Yeadon 14 mi · last frost Apr 2
- West Chester 18 mi · last frost Apr 26
Updated