St. Helena, NE Weather & Growing Conditions
Tonight
63°F
Mostly Cloudy then Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms after 3am. Mostly cloudy. Low around 63, with temperatures rising to around 65 overnight. North northwest wind around 9 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 63°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 9 mph NNW | 20% |
| Saturday | 69°F | Slight Chance Rain Showers then Cloudy | 12 mph NNW | 21% |
| Saturday Night | 59°F | Cloudy then Slight Chance Rain Showers | 12 mph NNE | 16% |
| Sunday | 64°F | Rain Showers Likely | 13 mph NE | 59% |
| Sunday Night | 55°F | Showers And Thunderstorms | 10 mph ENE | 83% |
| Monday | 60°F | Showers And Thunderstorms Likely | 12 mph ENE | 83% |
| Monday Night | 50°F | Chance Showers And Thunderstorms then Mostly Cloudy | 5 to 9 mph ENE | 40% |
| Tuesday | 64°F | Mostly Cloudy | 5 to 10 mph E | 6% |
| Tuesday Night | 51°F | Mostly Cloudy | 9 mph SE | 3% |
| Wednesday | 68°F | Partly Sunny | 8 to 13 mph SSE | 14% |
| Wednesday Night | 55°F | Chance Rain Showers | 9 mph SE | 47% |
| Thursday | 68°F | Chance Rain Showers | 8 to 12 mph SSE | 47% |
| Thursday Night | 57°F | Mostly Cloudy then Slight Chance Rain Showers | 8 mph SE | 18% |
| Friday | 70°F | Slight Chance Rain Showers | 7 to 12 mph SE | 18% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Helena, NE
Last spring frost
Apr 27
First fall frost
Oct 11
Growing season
164 days
Hardiness zone
5a
Explore more for St. Helena, NE: full frost dates · planting calendar · Nebraska frost dates
Climate data from the nearest NOAA station, Yankton 2 E, Sd (6.4 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.