Riverside, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Riverside, a city in Washington County, Iowa.
This Afternoon
69°F
Showers And Thunderstorms
Rain showers before 3pm, then showers and thunderstorms. Mostly cloudy. High near 69, with temperatures falling to around 65 in the afternoon. South wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 90%.
7-day forecast for Riverside
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Showers And Thunderstorms | 15 mph S | 93% |
| Tonight | 50°F | Chance Rain Showers then Mostly Cloudy | 10 to 15 mph S | 46% |
| Wednesday | 54°F | Slight Chance Rain Showers | 15 mph SW | 24% |
| Wednesday Night | 45°F | Mostly Cloudy | 10 to 15 mph SW | 12% |
| Thursday | 53°F | Chance Rain Showers | 10 to 15 mph W | 38% |
| Thursday Night | 42°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 29% |
| Friday | 51°F | Partly Sunny | 5 to 10 mph N | 8% |
| Friday Night | 34°F | Partly Cloudy | 0 to 5 mph NW | 0% |
| Saturday | 53°F | Mostly Sunny | 0 to 5 mph W | 2% |
| Saturday Night | 36°F | Mostly Clear | 0 to 5 mph W | 1% |
| Sunday | 57°F | Sunny | 5 to 10 mph W | 2% |
| Sunday Night | 37°F | Mostly Clear | 0 to 5 mph W | 2% |
| Monday | 63°F | Sunny | 5 to 10 mph SW | 0% |
| Monday Night | 41°F | Mostly Clear | 5 mph W | 0% |
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 Nov 3, 2026.