Dawson, IL Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dawson, a village in Sangamon County, Illinois.
Overnight
56°F
Chance Light Rain
A chance of rain before 5am. Mostly cloudy, with a low around 56. South southwest wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Dawson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Chance Light Rain | 14 mph SSW | 38% |
| Wednesday | 60°F | Patchy Drizzle | 12 to 15 mph SW | 11% |
| Wednesday Night | 46°F | Patchy Drizzle then Mostly Cloudy | 12 mph WSW | 10% |
| Thursday | 61°F | Partly Sunny | 10 to 15 mph WSW | 10% |
| Thursday Night | 44°F | Mostly Cloudy | 5 to 9 mph NW | 7% |
| Friday | 54°F | Partly Sunny | 12 mph NNW | 4% |
| Friday Night | 34°F | Partly Cloudy | 2 to 8 mph NNW | 0% |
| Saturday | 53°F | Sunny | 2 to 6 mph NNW | 0% |
| Saturday Night | 33°F | Partly Cloudy | 3 mph NW | 1% |
| Sunday | 58°F | Sunny | 2 to 8 mph WNW | 1% |
| Sunday Night | 34°F | Clear | 1 to 5 mph W | 1% |
| Monday | 63°F | Sunny | 1 to 8 mph SW | 0% |
| Monday Night | 40°F | Clear | 6 mph SW | 0% |
| Tuesday | 66°F | Sunny | 5 mph WNW | 1% |
Forecast source: National Weather Service (api.weather.gov) for Dawson (39.853, -89.462). Updated through the day.
Growing snapshot for Dawson
Last spring frost
Apr 15
First fall frost
Oct 22
Growing season
188 days
Hardiness zone
6a
More local growing data for Dawson: nearby ZIP 62520 weather · frost dates · planting calendar · Illinois frost dates
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Climate data from the nearest NOAA station, Springfield #2, Il (11.9 mi from Dawson). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.