Gretna, NE Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Gretna, a city in Sarpy County, Nebraska.
This Afternoon
95°F
Sunny
Sunny. High near 95, with temperatures falling to around 92 in the afternoon. Heat index values as high as 105. South wind around 10 mph, with gusts as high as 21 mph.
7-day forecast for Gretna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 95°F | Sunny | 10 mph S | 2% |
| Tonight | 68°F | Chance Showers And Thunderstorms | 3 to 9 mph SSE | 43% |
| Saturday | 78°F | Chance Showers And Thunderstorms | 3 to 7 mph N | 28% |
| Saturday Night | 63°F | Chance Showers And Thunderstorms | 7 mph N | 31% |
| Sunday | 65°F | Chance Rain Showers | 8 mph NNE | 35% |
| Sunday Night | 59°F | Chance Rain Showers | 7 mph NE | 39% |
| Monday | 60°F | Chance Rain Showers | 7 mph NE | 53% |
| Monday Night | 55°F | Chance Rain Showers then Mostly Cloudy | 6 mph NE | 46% |
| Tuesday | 61°F | Mostly Cloudy | 5 mph NE | 8% |
| Tuesday Night | 52°F | Partly Cloudy | 3 mph E | 2% |
| Wednesday | 63°F | Partly Sunny | 3 mph SE | 6% |
| Wednesday Night | 56°F | Mostly Cloudy then Slight Chance Rain Showers | 2 mph SE | 15% |
| Thursday | 65°F | Chance Rain Showers | 5 mph SE | 31% |
| Thursday Night | 58°F | Slight Chance Rain Showers | 3 mph SE | 20% |
Forecast source: National Weather Service (api.weather.gov) for Gretna (41.128, -96.197). Updated through the day.
Growing snapshot for Gretna
Last spring frost
Apr 21
First fall frost
Oct 18
Growing season
179 days
Hardiness zone
6a
More local growing data for Gretna: nearby ZIP 68136 weather · frost dates · planting calendar · Nebraska frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Gretna 4Ne, Ne (0.6 mi from Gretna). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.