Dawson, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dawson, a city in Dallas County, Iowa.
Today
80°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms. Mostly cloudy. High near 80, with temperatures falling to around 76 in the afternoon. West northwest wind around 7 mph. Chance of precipitation is 50%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Dawson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 80°F | Chance Showers And Thunderstorms | 7 mph WNW | 45% |
| Tonight | 60°F | Chance Showers And Thunderstorms | 9 mph N | 31% |
| Sunday | 66°F | Chance Rain Showers | 12 mph NNE | 41% |
| Sunday Night | 55°F | Chance Rain Showers | 9 mph NE | 53% |
| Monday | 61°F | Rain Showers Likely | 10 mph NE | 58% |
| Monday Night | 50°F | Rain Showers Likely | 5 to 8 mph NE | 56% |
| Tuesday | 61°F | Partly Sunny | 7 mph ENE | 8% |
| Tuesday Night | 45°F | Partly Cloudy | 5 mph E | 2% |
| Wednesday | 65°F | Mostly Sunny | 5 mph E | 2% |
| Wednesday Night | 50°F | Partly Cloudy | 2 mph ESE | 9% |
| Thursday | 67°F | Slight Chance Rain Showers | 1 to 5 mph SE | 21% |
| Thursday Night | 54°F | Mostly Cloudy | 3 mph ESE | 8% |
| Friday | 68°F | Partly Sunny | 2 to 6 mph ESE | 8% |
| Friday Night | 55°F | Mostly Cloudy | 3 mph ESE | 10% |
Forecast source: National Weather Service (api.weather.gov) for Dawson (41.843, -94.220). Updated through the day.
Growing snapshot for Dawson
Last spring frost
Apr 25
First fall frost
Oct 10
Growing season
166 days
Hardiness zone
5a
More local growing data for Dawson: nearby ZIP 50066 weather · frost dates · planting calendar · Iowa frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Perry, Ia (6.9 mi from Dawson). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.