Dawson, IA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dawson, a city in Dallas County, Iowa.
Overnight
43°F
Chance Rain Showers
A chance of rain showers. Cloudy. Low around 43, with temperatures rising to around 46 overnight. West northwest wind around 14 mph, with gusts as high as 18 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Dawson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 43°F | Chance Rain Showers | 14 mph WNW | 31% |
| Wednesday | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 12 to 15 mph W | 15% |
| Wednesday Night | 41°F | Mostly Cloudy then Chance Rain Showers | 12 mph WNW | 29% |
| Thursday | 53°F | Slight Chance Rain Showers then Mostly Cloudy | 12 mph NW | 22% |
| Thursday Night | 37°F | Mostly Cloudy | 5 to 8 mph N | 4% |
| Friday | 50°F | Mostly Sunny | 2 to 6 mph N | 2% |
| Friday Night | 29°F | Partly Cloudy | 2 mph N | 0% |
| Saturday | 54°F | Mostly Sunny | 3 mph SW | 0% |
| Saturday Night | 35°F | Mostly Clear | 3 mph WSW | 0% |
| Sunday | 59°F | Sunny | 5 mph W | 0% |
| Sunday Night | 37°F | Clear | 3 mph SW | 0% |
| Monday | 65°F | Sunny | 3 to 8 mph SW | 0% |
| Monday Night | 40°F | Mostly Clear | 5 mph WNW | 0% |
| Tuesday | 64°F | Sunny | 3 mph NNW | 0% |
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 Nov 4, 2026.