Royal, IA Weather & Growing Conditions
Overnight
56°F
Patchy Drizzle
Patchy drizzle before 2am, then patchy drizzle and patchy fog. Cloudy, with a low around 56. North northeast wind 10 to 15 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Patchy Drizzle | 10 to 15 mph NNE | 15% |
| Sunday | 64°F | Patchy Fog | 15 mph NE | 22% |
| Sunday Night | 51°F | Showers And Thunderstorms | 10 to 15 mph ENE | 87% |
| Monday | 58°F | Rain Showers Likely | 10 to 15 mph NE | 68% |
| Monday Night | 45°F | Slight Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NE | 19% |
| Tuesday | 63°F | Mostly Sunny | 5 to 10 mph E | 7% |
| Tuesday Night | 41°F | Mostly Clear | 5 mph ESE | 0% |
| Wednesday | 65°F | Sunny | 5 to 10 mph SE | 1% |
| Wednesday Night | 46°F | Partly Cloudy then Chance Rain Showers | 5 mph SE | 25% |
| Thursday | 67°F | Chance Rain Showers | 5 to 10 mph SSE | 38% |
| Thursday Night | 51°F | Mostly Cloudy | 5 mph SSE | 11% |
| Friday | 70°F | Partly Sunny | 5 to 10 mph SE | 9% |
| Friday Night | 52°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph SE | 17% |
| Saturday | 70°F | Slight Chance Rain Showers | 5 to 15 mph SE | 24% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Royal, IA
Last spring frost
May 2
First fall frost
Oct 2
Growing season
154 days
Hardiness zone
5a
Explore more for Royal, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Spencer Muni Ap, Ia (8.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.