Lewis, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Lewis, a city in Cass County, Iowa.
Today
82°F
Partly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 1pm. Partly sunny. High near 82, with temperatures falling to around 80 in the afternoon. North wind 3 to 12 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Lewis
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Partly Sunny then Chance Showers And Thunderstorms | 3 to 12 mph N | 45% |
| Tonight | 61°F | Showers And Thunderstorms | 7 to 12 mph NNE | 85% |
| Wednesday | 73°F | Chance Showers And Thunderstorms | 9 mph NE | 52% |
| Wednesday Night | 57°F | Partly Cloudy | 1 to 8 mph ENE | 13% |
| Thursday | 81°F | Sunny | 1 to 5 mph E | 4% |
| Thursday Night | 62°F | Mostly Clear | 3 mph SE | 5% |
| Friday | 85°F | Sunny | 3 to 9 mph S | 5% |
| Friday Night | 67°F | Mostly Clear | 7 mph S | 7% |
| Saturday | 90°F | Sunny | 3 to 13 mph S | 3% |
| Saturday Night | 72°F | Mostly Clear | 13 mph S | 10% |
| Sunday | 90°F | Mostly Sunny | 9 to 14 mph S | 10% |
| Sunday Night | 72°F | Slight Chance Showers And Thunderstorms | 14 mph S | 24% |
| Monday | 91°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 12 to 15 mph S | 21% |
| Monday Night | 72°F | Chance Showers And Thunderstorms | 10 to 16 mph SE | 25% |
Forecast source: National Weather Service (api.weather.gov) for Lewis (41.306, -95.084). Updated through the day.
Growing snapshot for Lewis
Last spring frost
Apr 30
First fall frost
Oct 2
Growing season
153 days
Hardiness zone
5b
More local growing data for Lewis: nearby ZIP 51544 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Atlantic 1 Ne, Ia (8.8 mi from Lewis). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.