Riverside, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Riverside, a city in Washington County, Iowa.
Today
87°F
Mostly Sunny then Chance Showers And Thunderstorms
A chance of showers and thunderstorms after 3pm. Mostly sunny. High near 87, with temperatures falling to around 84 in the afternoon. Southwest wind 5 to 10 mph. Chance of precipitation is 30%.
7-day forecast for Riverside
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 10 mph SW | 32% |
| Tonight | 66°F | Showers And Thunderstorms Likely | 5 to 10 mph N | 83% |
| Wednesday | 78°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 5 mph N | 81% |
| Wednesday Night | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 5 mph N | 57% |
| Thursday | 81°F | Chance Rain Showers then Mostly Sunny | 5 mph NE | 33% |
| Thursday Night | 62°F | Mostly Clear | 0 to 5 mph E | 3% |
| Friday | 84°F | Mostly Sunny | 0 to 5 mph SE | 5% |
| Friday Night | 66°F | Mostly Clear | 5 mph S | 12% |
| Saturday | 87°F | Sunny | 5 mph S | 10% |
| Saturday Night | 71°F | Mostly Clear | 5 to 10 mph S | 12% |
| Sunday | 89°F | Sunny | 10 mph S | 12% |
| Sunday Night | 71°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 33% |
| Monday | 88°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 5 to 10 mph S | 33% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 10 mph S | 32% |
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 Aug 4, 2026.