When to plant in Westmont, PA
Planting dates worked out from Westmont's own frost records, not a generic zone chart.
Safe to plant out
May 15
1 year in 10 has a later frost
Average last frost
May 1
about a 50% chance of a later one
Average first fall frost
Oct 17
1 year in 10 by Oct 2
Frost-free days
166
median, 1991–2020
Station used: Johnstown Cambria Co Ap · 10.2 km away · station 694 m, town 534 m. How we match towns to stations
The station sits 160 m higher than the town, so frost dates here may be off by a week or more. Check them against local experience.
This season
Plan your garden.
Planting dates for common crops
| Crop | Start indoors | Plant out or sow | Harvest from |
|---|---|---|---|
| Tomato | Mar 20 – Apr 3 | May 15 – May 29 | Jul 9 |
| Sweet pepper | Mar 6 – Mar 20 | May 15 – May 29 | Jul 14 |
| Lettuce (leaf) | Feb 27 – Mar 6 | Apr 3 – Apr 17 | May 13 |
| Peas | — | Apr 2 – Apr 30 | May 27 |
| Bush beans | — | May 8 – May 29 | Jun 27 |
| Carrot | — | Apr 11 – May 23 | Jun 10 |
| Beet | — | Apr 11 – May 23 | May 31 |
| Potato | — | Apr 11 – May 2 | Jun 20 |
| Kale | Feb 26 – Mar 12 | Apr 9 – Apr 23 | May 22 |
| Broccoli | Feb 20 – Mar 6 | Apr 3 – Apr 24 | Jun 2 |
| Cucumber | Apr 17 – Apr 24 | May 15 – May 29 | Jul 4 |
| Summer squash and zucchini | Apr 17 – Apr 24 | May 15 – May 29 | Jun 29 |
| Winter squash | Apr 17 – Apr 24 | May 15 – May 29 | Aug 3 |
| Sweet corn | — | May 8 – May 29 | Jul 7 |
| Onion (from sets) | — | Apr 3 – Apr 24 | Jul 2 |
| Garlic | — | Oct 3 – Oct 31 (fall) | following summer |
| Spinach | — | Apr 2 – Apr 30 | May 10 |
| Basil | Apr 3 – Apr 17 | May 15 – May 29 | Jul 11 |
Westmont's weather over time
How the growing season has shifted here, year by year, from the station's own records.
Each year's last spring frostLong-term trend
See the data as a table
| Year | Last spring frost |
|---|---|
| 2001 | Apr 25 |
| 2002 | May 22 |
| 2003 | Apr 24 |
| 2004 | May 4 |
| 2005 | May 4 |
| 2006 | May 23 |
| 2007 | Apr 16 |
| 2008 | May 12 |
| 2009 | Apr 16 |
| 2010 | May 10 |
| 2011 | Apr 17 |
| 2012 | Apr 29 |
| 2013 | May 14 |
| 2014 | Apr 27 |
| 2015 | Apr 25 |
| 2016 | Apr 13 |
| 2017 | May 9 |
| 2018 | Apr 29 |
| 2019 | Apr 29 |
| 2020 | May 9 |
| 2021 | Apr 26 |
| 2022 | Apr 29 |
| 2023 | May 3 |
| 2024 | Apr 22 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 2001 | 164 |
| 2002 | 147 |
| 2003 | 160 |
| 2004 | 160 |
| 2005 | 173 |
| 2006 | 141 |
| 2007 | 195 |
| 2008 | 158 |
| 2009 | 180 |
| 2010 | 172 |
| 2011 | 167 |
| 2012 | 161 |
| 2013 | 161 |
| 2014 | 187 |
| 2015 | 175 |
| 2016 | 195 |
| 2017 | 174 |
| 2018 | 174 |
| 2019 | 166 |
| 2020 | 160 |
| 2021 | 189 |
| 2022 | 172 |
| 2023 | 180 |
| 2024 | 187 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 2001 | 16.0 °C |
| 2002 | 17.1 °C |
| 2003 | 15.7 °C |
| 2004 | 16.3 °C |
| 2005 | 16.8 °C |
| 2006 | 15.8 °C |
| 2007 | 16.6 °C |
| 2008 | 16.3 °C |
| 2009 | 15.7 °C |
| 2010 | 17.4 °C |
| 2011 | 17.0 °C |
| 2012 | 16.7 °C |
| 2013 | 15.9 °C |
| 2014 | 16.0 °C |
| 2015 | 17.5 °C |
| 2016 | 17.5 °C |
| 2017 | 17.1 °C |
| 2018 | 17.5 °C |
| 2019 | 17.7 °C |
| 2020 | 16.6 °C |
| 2021 | 17.2 °C |
| 2022 | 16.9 °C |
| 2023 | 16.7 °C |
| 2024 | 18.0 °C |
What this means for you: This station's record is too short to show a reliable trend yet.
Source: daily records from Johnstown Cambria Co Ap (NOAA GHCN-Daily). Years with too many missing days are left out.