Riverside, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Riverside, a city in Washington County, Iowa.
Today
83°F
Patchy Fog
Patchy fog and occasional showers and thunderstorms before 1pm, then a chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 83. South wind 5 to 10 mph. Chance of precipitation is 90%.
7-day forecast for Riverside
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Patchy Fog | 5 to 10 mph S | 87% |
| Tonight | 65°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 5 to 10 mph NW | 90% |
| Sunday | 70°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 69% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 10 to 15 mph NE | 59% |
| Monday | 64°F | Rain Showers Likely | 15 mph NE | 59% |
| Monday Night | 52°F | Chance Rain Showers | 10 to 15 mph NE | 43% |
| Tuesday | 62°F | Chance Rain Showers | 10 to 15 mph NE | 26% |
| Tuesday Night | 48°F | Mostly Clear | 5 to 10 mph NE | 6% |
| Wednesday | 67°F | Sunny | 5 to 10 mph NE | 0% |
| Wednesday Night | 52°F | Partly Cloudy | 0 to 5 mph NE | 1% |
| Thursday | 68°F | Mostly Sunny | 0 to 5 mph NE | 6% |
| Thursday Night | 55°F | Partly Cloudy | 0 to 5 mph NE | 5% |
| Friday | 71°F | Mostly Sunny | 0 to 5 mph E | 6% |
| Friday Night | 55°F | Partly Cloudy | 0 to 5 mph E | 7% |
Forecast source: National Weather Service (api.weather.gov) for Riverside (41.483, -91.572). Updated through the day.
Growing snapshot for Riverside
Last spring frost
Apr 29
First fall frost
Oct 9
Growing season
162 days
Hardiness zone
5b
More local growing data for Riverside: nearby ZIP 52327 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Iowa City, Ia (10 mi from Riverside). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.