Spencer, IA Weather & Growing Conditions
Today
74°F
Showers And Thunderstorms
A chance of rain showers and patchy smoke before 1pm, then showers and thunderstorms between 1pm and 5pm, then patchy smoke and scattered showers and thunderstorms. Mostly cloudy, with a high near 74. North wind 5 to 10 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Showers And Thunderstorms | 5 to 10 mph N | 80% |
| Tonight | 54°F | Patchy Smoke then Mostly Cloudy | 0 to 5 mph NNW | 45% |
| Wednesday | 76°F | Mostly Sunny | 0 to 5 mph ENE | 1% |
| Wednesday Night | 52°F | Mostly Clear | 5 mph SSE | 0% |
| Thursday | 82°F | Sunny | 5 to 10 mph SSW | 0% |
| Thursday Night | 60°F | Mostly Clear | 5 to 10 mph S | 3% |
| Friday | 86°F | Sunny | 5 to 15 mph SSW | 6% |
| Friday Night | 63°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 15% |
| Saturday | 89°F | Sunny | 5 to 15 mph S | 10% |
| Saturday Night | 67°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph ESE | 25% |
| Sunday | 88°F | Chance Showers And Thunderstorms then Mostly Sunny | 10 mph SE | 25% |
| Sunday Night | 67°F | Partly Cloudy then Chance Showers And Thunderstorms | 10 mph ESE | 29% |
| Monday | 87°F | Chance Showers And Thunderstorms then Partly Sunny | 10 to 15 mph E | 29% |
| Monday Night | 66°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph ENE | 28% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Spencer, IA
Last spring frost
May 1
First fall frost
Oct 3
Growing season
154 days
Hardiness zone
5a
Explore more for Spencer, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Spencer 1 N, Ia (0.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.