Spencer, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Spencer, a city in Clay County, Iowa.
Overnight
62°F
Widespread Fog
Widespread fog and a slight chance of showers and thunderstorms. Cloudy. Low around 62, with temperatures rising to around 65 overnight. North northeast wind around 5 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Spencer
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Widespread Fog | 5 mph NNE | 24% |
| Saturday | 69°F | Widespread Fog | 5 to 10 mph N | 36% |
| Saturday Night | 55°F | Slight Chance Rain Showers then Cloudy | 10 to 15 mph NNE | 16% |
| Sunday | 66°F | Cloudy | 15 mph NE | 14% |
| Sunday Night | 51°F | Chance Rain Showers | 10 to 15 mph ENE | 40% |
| Monday | 61°F | Chance Rain Showers | 10 mph ENE | 52% |
| Monday Night | 46°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph ENE | 33% |
| Tuesday | 63°F | Mostly Sunny | 5 to 10 mph E | 6% |
| Tuesday Night | 43°F | Partly Cloudy | 0 to 5 mph ESE | 1% |
| Wednesday | 66°F | Mostly Sunny | 0 to 5 mph SE | 2% |
| Wednesday Night | 48°F | Partly Cloudy then Slight Chance Rain Showers | 5 mph SE | 15% |
| Thursday | 68°F | Slight Chance Rain Showers | 5 mph SE | 19% |
| Thursday Night | 51°F | Mostly Cloudy | 5 mph SE | 13% |
| Friday | 70°F | Partly Sunny | 5 to 10 mph SE | 13% |
Forecast source: National Weather Service (api.weather.gov) for Spencer (43.147, -95.153). Updated through the day.
Growing snapshot for Spencer
Last spring frost
May 1
First fall frost
Oct 3
Growing season
154 days
Hardiness zone
5a
More local growing data for Spencer: nearby ZIP 51301 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Spencer 1 N, Ia (0.9 mi from Spencer). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.