Gretna, NE Weather & Growing Conditions
Today
79°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms between 8am and 2pm, then a chance of showers and thunderstorms between 2pm and 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then patchy smoke and a chance of showers and thunderstorms. Partly sunny, with a high near 79. North northeast wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 79°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph NNE | 48% |
| Tonight | 62°F | Chance Showers And Thunderstorms | 5 to 12 mph NNE | 78% |
| Wednesday | 74°F | Patchy Smoke | 7 mph NE | 62% |
| Wednesday Night | 58°F | Mostly Clear | 1 to 5 mph ENE | 7% |
| Thursday | 81°F | Mostly Sunny | 0 to 5 mph ESE | 1% |
| Thursday Night | 64°F | Mostly Clear | 3 mph SSE | 7% |
| Friday | 86°F | Sunny | 3 to 7 mph S | 7% |
| Friday Night | 69°F | Mostly Clear | 6 mph S | 3% |
| Saturday | 91°F | Sunny | 2 to 12 mph S | 2% |
| Saturday Night | 73°F | Mostly Clear | 7 to 10 mph S | 5% |
| Sunday | 93°F | Mostly Sunny | 6 to 10 mph SSE | 4% |
| Sunday Night | 73°F | Partly Cloudy | 10 mph SSE | 12% |
| Monday | 93°F | Mostly Sunny | 8 to 13 mph SSW | 12% |
| Monday Night | 74°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 7 to 12 mph SSE | 21% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Gretna, NE
Last spring frost
Apr 21
First fall frost
Oct 18
Growing season
179 days
Hardiness zone
5b
Explore more for Gretna, NE: full frost dates · planting calendar · Nebraska frost dates
Climate data from the nearest NOAA station, Gretna 4Ne, Ne (5.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.