Dawson, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dawson, a city in Dallas County, Iowa.
This Afternoon
79°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Mostly cloudy. High near 79, with temperatures falling to around 73 in the afternoon. North northwest wind around 9 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Dawson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Slight Chance Showers And Thunderstorms | 9 mph NNW | 22% |
| Tonight | 61°F | Chance Showers And Thunderstorms | 9 mph N | 40% |
| Sunday | 65°F | Slight Chance Rain Showers then Chance Drizzle | 12 mph NNE | 38% |
| Sunday Night | 54°F | Rain Showers Likely | 9 mph NE | 72% |
| Monday | 59°F | Rain Showers | 9 mph NE | 85% |
| Monday Night | 50°F | Rain Showers | 5 to 8 mph NE | 75% |
| Tuesday | 61°F | Mostly Cloudy | 7 mph NE | 11% |
| Tuesday Night | 46°F | Partly Cloudy | 5 mph ENE | 2% |
| Wednesday | 64°F | Mostly Sunny | 5 mph E | 0% |
| Wednesday Night | 51°F | Mostly Cloudy | 2 mph ESE | 9% |
| Thursday | 67°F | Chance Rain Showers | 5 mph SE | 29% |
| Thursday Night | 56°F | Slight Chance Rain Showers | 3 mph SE | 24% |
| Friday | 69°F | Slight Chance Rain Showers | 5 mph ESE | 19% |
| Friday Night | 57°F | Mostly Cloudy then Slight Chance Rain Showers | 3 mph ESE | 15% |
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.