When to plant in Washington Terrace, UT
Planting dates worked out from Washington Terrace's own frost records, not a generic zone chart.
Safe to plant out
May 8
1 year in 10 has a later frost
Average last frost
Apr 25
about a 50% chance of a later one
Average first fall frost
Oct 21
1 year in 10 by Oct 4
Frost-free days
178
median, 1991–2020
Station used: Ogden Hinkley Ap · 4.1 km away · station 1356 m, town 1405 m. How we match towns to stations
This season
Plan your garden.
Planting dates for common crops
| Crop | Start indoors | Plant out or sow | Harvest from |
|---|---|---|---|
| Tomato | Mar 13 – Mar 27 | May 8 – May 22 | Jul 2 |
| Sweet pepper | Feb 27 – Mar 13 | May 8 – May 22 | Jul 7 |
| Lettuce (leaf) | Feb 21 – Feb 28 | Mar 28 – Apr 11 | May 7 |
| Peas | — | Mar 15 – Apr 12 | May 9 |
| Bush beans | — | May 1 – May 22 | Jun 20 |
| Carrot | — | Apr 4 – May 16 | Jun 3 |
| Beet | — | Apr 2 – May 14 | May 22 |
| Potato | — | Apr 4 – Apr 25 | Jun 13 |
| Kale | Feb 14 – Feb 28 | Mar 28 – Apr 11 | May 10 |
| Broccoli | Feb 14 – Feb 28 | Mar 28 – Apr 18 | May 27 |
| Cucumber | Apr 10 – Apr 17 | May 8 – May 22 | Jun 27 |
| Summer squash and zucchini | Apr 10 – Apr 17 | May 8 – May 22 | Jun 22 |
| Winter squash | Apr 10 – Apr 17 | May 8 – May 22 | Jul 27 |
| Sweet corn | — | May 1 – May 22 | Jun 30 |
| Onion (from sets) | — | Mar 28 – Apr 18 | Jun 26 |
| Garlic | — | Oct 7 – Nov 4 (fall) | following summer |
| Spinach | — | Mar 15 – Apr 12 | Apr 22 |
| Basil | Mar 27 – Apr 10 | May 8 – May 22 | Jul 4 |
Washington Terrace'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 |
|---|---|
| 1948 | May 10 |
| 1949 | Apr 14 |
| 1950 | May 19 |
| 1951 | Apr 30 |
| 1999 | Apr 30 |
| 2000 | Apr 1 |
| 2001 | May 2 |
| 2002 | May 8 |
| 2003 | Apr 18 |
| 2004 | Apr 29 |
| 2005 | May 11 |
| 2006 | Apr 19 |
| 2007 | Apr 18 |
| 2008 | May 2 |
| 2009 | Apr 16 |
| 2010 | May 7 |
| 2011 | May 4 |
| 2012 | Apr 28 |
| 2013 | May 2 |
| 2014 | Apr 29 |
| 2015 | Apr 16 |
| 2016 | Apr 1 |
| 2017 | May 18 |
| 2018 | Apr 18 |
| 2019 | Apr 17 |
| 2020 | Apr 17 |
| 2021 | Apr 12 |
| 2022 | Apr 13 |
| 2023 | Apr 19 |
| 2024 | Apr 8 |
Each year's frost-free daysLong-term trend
See the data as a table
| Year | Frost-free days |
|---|---|
| 1948 | 159 |
| 1949 | 178 |
| 1950 | 172 |
| 1951 | 174 |
| 1999 | 150 |
| 2000 | 213 |
| 2001 | 160 |
| 2002 | 156 |
| 2003 | 194 |
| 2004 | 178 |
| 2005 | 185 |
| 2006 | 181 |
| 2007 | 185 |
| 2008 | 160 |
| 2009 | 172 |
| 2010 | 172 |
| 2011 | 174 |
| 2012 | 179 |
| 2013 | 166 |
| 2014 | 181 |
| 2015 | 201 |
| 2016 | 228 |
| 2017 | 137 |
| 2018 | 178 |
| 2019 | 165 |
| 2020 | 188 |
| 2021 | 217 |
| 2022 | 193 |
| 2023 | 190 |
| 2024 | 209 |
Each year's average temperature, April to SeptemberLong-term trend
See the data as a table
| Year | Growing-season temperature |
|---|---|
| 1948 | 18.4 °C |
| 1949 | 19.2 °C |
| 1950 | 17.2 °C |
| 1951 | 17.8 °C |
| 1999 | 17.4 °C |
| 2000 | 19.6 °C |
| 2001 | 19.5 °C |
| 2002 | 19.8 °C |
| 2003 | 19.4 °C |
| 2004 | 18.6 °C |
| 2005 | 18.2 °C |
| 2006 | 19.5 °C |
| 2007 | 20.2 °C |
| 2008 | 18.2 °C |
| 2009 | 18.6 °C |
| 2010 | 17.8 °C |
| 2011 | 17.8 °C |
| 2012 | 20.1 °C |
| 2013 | 19.6 °C |
| 2014 | 19.2 °C |
| 2015 | 19.5 °C |
| 2016 | 19.6 °C |
| 2017 | 19.3 °C |
| 2018 | 20.2 °C |
| 2019 | 18.1 °C |
| 2020 | 20.5 °C |
| 2021 | 21.2 °C |
| 2022 | 20.9 °C |
| 2023 | 20.6 °C |
| 2024 | 21.7 °C |
What this means for you: Since 1948, Washington Terrace's last spring frost has come about 2 days earlier per decade, on average. The frost-free season has grown by about 2 days per decade. Year-to-year swings are large, so keep using the safe date rather than the trend.
Source: daily records from Ogden Hinkley Ap (NOAA GHCN-Daily). Years with too many missing days are left out.