St. Helena, NE Weather & Growing Conditions
Tonight
39°F
Rain Showers Likely
Rain showers likely. Cloudy. Low around 39, with temperatures rising to around 42 overnight. Northwest wind around 20 mph, with gusts as high as 31 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 39°F | Rain Showers Likely | 20 mph NW | 71% |
| Wednesday | 46°F | Rain Showers Likely | 16 to 20 mph WNW | 56% |
| Wednesday Night | 37°F | Chance Rain Showers | 15 mph NW | 43% |
| Thursday | 47°F | Mostly Cloudy | 12 to 16 mph NNW | 13% |
| Thursday Night | 33°F | Mostly Cloudy | 2 to 9 mph N | 0% |
| Friday | 48°F | Partly Sunny | 3 mph ESE | 0% |
| Friday Night | 33°F | Partly Cloudy | 5 mph S | 0% |
| Saturday | 58°F | Mostly Sunny | 5 to 8 mph WSW | 2% |
| Saturday Night | 37°F | Mostly Clear | 7 mph W | 4% |
| Sunday | 61°F | Sunny | 8 mph SW | 2% |
| Sunday Night | 41°F | Mostly Clear | 7 to 10 mph SSW | 1% |
| Monday | 61°F | Sunny | 8 to 14 mph W | 0% |
| Monday Night | 39°F | Mostly Clear | 7 mph WNW | 0% |
| Tuesday | 59°F | Mostly Sunny | 5 to 8 mph SSW | 0% |
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 Nov 4, 2026.