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Nebraska frost dates
Across the 23Nebraska weather stations below, the average last spring frost ranges from Apr 16 in Omaha #1 to May 27 in Harrison 20 Sse. The statewide middle is about May 1 for the last spring frost and Oct 8 for the first fall frost. Omaha Eppley Airfield has the longest growing season, about 186 days. Hardiness zones in these places: 5a, 5b, 6a.
Frost dates by city
| Place | Zone | Last spring frost | 90% safe after | First fall frost | Frost-free days |
|---|---|---|---|---|---|
| Omaha #1 | 5b | Apr 16 | May 6 | Oct 18 | 185 |
| Falls Brenner | 6a | Apr 18 | May 2 | Oct 17 | 182 |
| Omaha Eppley Airfield | 6a | Apr 18 | Apr 30 | Oct 21 | 186 |
| Hastings | 6a | Apr 22 | May 5 | Oct 16 | 177 |
| Lincoln 11 Sw | 6a | Apr 22 | May 4 | Oct 14 | 175 |
| Grand Island | 5b | Apr 23 | May 6 | Oct 15 | 175 |
| Tekamah | 5b | Apr 23 | May 6 | Oct 8 | 168 |
| Lincoln | 6a | Apr 24 | May 7 | Oct 13 | 172 |
| Lincoln 8 Ene | 6a | Apr 27 | May 8 | Oct 10 | 166 |
| Norfolk Karl Stefan | 5b | Apr 30 | May 14 | Oct 5 | 158 |
| Broken Bow | 5b | May 1 | May 15 | Oct 7 | 159 |
| Mccook | 6a | May 1 | May 15 | Oct 9 | 161 |
| Imperial | 5b | May 2 | May 13 | Oct 11 | 162 |
| Hayes Center 1Nw | 5b | May 3 | May 16 | Oct 10 | 160 |
| Whitman 5 Ene | 5b | May 4 | May 16 | Oct 8 | 157 |
| Ord Evelyn Sharp | 5b | May 5 | May 19 | Oct 3 | 151 |
| Scottsbluff Heilig | 5a | May 5 | May 18 | Oct 4 | 152 |
| North Platte | 5b | May 11 | May 26 | Oct 1 | 143 |
| Valentine Miller | 5a | May 12 | May 25 | Sep 29 | 140 |
| Chadron | 5a | May 14 | May 27 | Sep 30 | 139 |
| Sidney | 5b | May 15 | May 30 | Sep 30 | 138 |
| Alliance | 5a | May 22 | Jun 5 | Sep 22 | 123 |
| Harrison 20 Sse | 5a | May 27 | Jun 14 | Sep 11 | 107 |
Dates are the 50% probability of a 32°F freeze (NOAA 1991–2020 normals); "90% safe after" is the date after which a later spring freeze happens in only 1 year in 10.
When to plant in Nebraska
Using the statewide middle dates (last frost May 1, first frost Oct 8). Adjust for your town with the table above or the planting calendar.
| Plant | When to plant in Nebraska |
|---|---|
| Tomatoes | May 8 – May 22 |
| Peas | Mar 20 – Apr 10; fall: Jul 16 – Aug 6 |
| Potatoes | Apr 3 – Apr 24 |
| Green beans | May 8 – May 22; fall: Jul 23 – Aug 6 |
| Garlic | Oct 8 – Nov 5 |
| Tulips | Sep 24 – Nov 5 |