Frost dates for New Kensington, PA
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
April 16
typical year
Safe to plant
May 2
frost is over in 9 of 10 years
First fall frost
November 2
typical year
Growing season
199 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | – | Mar 19 – Apr 2 | – |
| Spinach | – | Mar 5 – 26 | Sep 7 – 21 |
| Lettuce | – | Mar 19 – Apr 9 | Sep 7 – 21 |
| Radishes | – | Mar 19 – Apr 30 | Sep 21 – Oct 5 |
| Onions | – | Mar 19 – Apr 2 | – |
| Potatoes | – | Mar 26 – Apr 9 | – |
| Carrots | – | Mar 26 – Apr 16 | Aug 10 – 24 |
| Beets | – | Mar 19 – Apr 2 | Aug 24 – Sep 7 |
| Kale | Feb 5 – 19 | Mar 19 – Apr 2 | Aug 24 – Sep 7 |
| Broccoli | Feb 5 – 19 | Apr 2 – 16 | Aug 24 – Sep 7 |
| Cabbage | Jan 22 – Feb 5 | Mar 19 – Apr 2 | Aug 24 – Sep 7 |
| Garlic | – | – | Sep 21 – Oct 12 |
| Warm-season crops | |||
| Tomatoes | Mar 7 – 21 | May 2 – 16 | – |
| Peppers | Feb 28 – Mar 14 | May 9 – 23 | – |
| Cucumbers | – | May 2 – 23 | – |
| Zucchini | – | May 2 – 30 | – |
| Pumpkins | – | May 2 – 23 | – |
| Green beans | – | May 2 – Aug 24 | – |
| Sweet corn | – | May 2 – 30 | – |
| Basil | Mar 28 – Apr 11 | May 9 – 16 | – |
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | May 2 | April 16 | March 31 |
| Fall frost before | October 20 | November 2 | November 16 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around April 3 (April 16 in a late year), and the first one in fall around November 14.
Towns that use these dates
This is the nearest NOAA station with frost records for 5 towns.
New Kensington, Lower Burrell, Arnold, Tarentum, Brackenridge
Where these dates come from
NOAA weather station NATRONA LOCK 4, PA US (USC00366151), 1991–2020 climate normals. It's the nearest station for 5 zip codes, all within 5 miles:
15014, 15030, 15065, 15068, 15084
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.