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 5 to 10 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 | 5 to 10 mph WNW | 47% |
| Tonight | 61°F | Showers And Thunderstorms | 5 to 9 mph NNE | 91% |
| Wednesday | 73°F | Chance Showers And Thunderstorms | 7 mph ENE | 45% |
| Wednesday Night | 55°F | Partly Cloudy | 3 mph ENE | 11% |
| Thursday | 80°F | Mostly Sunny | 0 to 3 mph E | 1% |
| Thursday Night | 60°F | Mostly Clear | 3 mph SSE | 3% |
| Friday | 85°F | Sunny | 2 to 8 mph S | 5% |
| Friday Night | 66°F | Mostly Clear | 7 mph S | 11% |
| Saturday | 89°F | Sunny | 3 to 12 mph S | 11% |
| Saturday Night | 71°F | Mostly Clear | 12 mph S | 14% |
| Sunday | 89°F | Mostly Sunny | 12 mph SSE | 14% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms | 10 mph SSE | 31% |
| Monday | 89°F | Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms | 14 mph SSE | 31% |
| Monday Night | 71°F | Slight Chance Showers And Thunderstorms | 9 to 13 mph SE | 22% |
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 Aug 4, 2026.