St. Helena, NE Weather & Growing Conditions
Tonight
64°F
Mostly Cloudy then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 2am. Mostly cloudy. Low around 64, with temperatures rising to around 66 overnight. North northwest wind around 7 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 64°F | Mostly Cloudy then Chance Showers And Thunderstorms | 7 mph NNW | 32% |
| Saturday | 68°F | Slight Chance Showers And Thunderstorms then Cloudy | 8 to 12 mph NNW | 23% |
| Saturday Night | 58°F | Cloudy then Slight Chance Rain Showers | 12 mph NNE | 17% |
| Sunday | 64°F | Chance Rain Showers | 10 to 14 mph NE | 35% |
| Sunday Night | 54°F | Rain Showers Likely | 10 mph ENE | 73% |
| Monday | 60°F | Rain Showers Likely | 12 mph ENE | 73% |
| Monday Night | 49°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 9 mph E | 22% |
| Tuesday | 63°F | Partly Sunny | 5 to 10 mph ESE | 6% |
| Tuesday Night | 48°F | Partly Cloudy | 8 mph SE | 2% |
| Wednesday | 67°F | Mostly Sunny | 8 to 14 mph SE | 11% |
| Wednesday Night | 54°F | Chance Rain Showers | 10 mph SE | 50% |
| Thursday | 69°F | Chance Showers And Thunderstorms | 13 mph SSE | 50% |
| Thursday Night | 56°F | Chance Rain Showers | 9 mph SE | 26% |
| Friday | 71°F | Chance Rain Showers then Partly Sunny | 8 to 14 mph SE | 25% |
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.