Clarion, IA Weather & Growing Conditions
Today
74°F
Patchy Fog
Patchy fog and a chance of showers and thunderstorms before 3pm, then a slight chance of showers and thunderstorms between 3pm and 4pm. Mostly cloudy, with a high near 74. Northwest wind around 9 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Patchy Fog | 9 mph NW | 43% |
| Tonight | 58°F | Slight Chance Rain Showers | 12 mph N | 19% |
| Sunday | 66°F | Mostly Cloudy then Slight Chance Drizzle | 15 mph NE | 22% |
| Sunday Night | 52°F | Chance Rain Showers | 13 mph ENE | 35% |
| Monday | 61°F | Chance Rain Showers | 9 to 14 mph ENE | 48% |
| Monday Night | 47°F | Chance Rain Showers | 6 to 9 mph ENE | 42% |
| Tuesday | 61°F | Mostly Sunny | 8 mph ENE | 9% |
| Tuesday Night | 44°F | Mostly Clear | 2 to 6 mph E | 0% |
| Wednesday | 65°F | Sunny | 5 mph E | 1% |
| Wednesday Night | 48°F | Partly Cloudy | 3 mph ESE | 8% |
| Thursday | 66°F | Partly Sunny | 5 mph SE | 14% |
| Thursday Night | 52°F | Mostly Cloudy | 2 mph SE | 6% |
| Friday | 69°F | Partly Sunny | 2 to 6 mph SE | 6% |
| Friday Night | 53°F | Mostly Cloudy | 5 mph SE | 11% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Clarion, IA
Last spring frost
Apr 30
First fall frost
Oct 10
Growing season
162 days
Hardiness zone
5a
Explore more for Clarion, IA: full frost dates · planting calendar · Iowa frost dates
Climate data from the nearest NOAA station, Clarion, Ia (1.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.