Williamson, IA
Full City Profile · Iowa · Lucas County County
4.1
/5.0
A
Great
228
Population
600/sq mi density
$53,438
Median Income
$20,369 per capita
$47,500
Home Value
$157,223 Zillow
48°F
Avg Temperature
A
Overall
4.1 / 5.0
Strong
C+
Economy
2.8 / 5.0
$53,438 median income, 7.2% unemployment
A+
Affordability
5.0 / 5.0
$47,500 home value, /mo rent
A
Education
4.4 / 5.0
0.0% bachelor's degree or higher
Williamson experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 21°F in January while summers reach 73°F in July. Annual precipitation totals 37.3 inches. The area receives 24.1 inches of snow annually.
Temperature
21°F Jan (-6°C)
73°F Jul (23°C)
| Annual Average | 48.3°F |
| 11% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 73°F (23°C) |
Geography
| Elevation | 1,025 ft (312 m) |
| Area | 0.4 sq mi (1.0 km²) |
| Population Density | 600/sq mi |
| Coordinates | 41.0882°N, 93.2570°W |
| Timezone | America/Chicago |
| County | Lucas County County |
| Nearest Airport | Des Moines International (DSM) 37 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 29.7 / 100 |
| Social Vulnerability | 69.1 / 100 |
| Community Resilience | 81.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively High |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 1.0 in | Coldest, Driest |
| February | 25°F (-4°C) | 1.4 in | |
| March | 37°F (3°C) | 1.9 in | |
| April | 48°F (9°C) | 4.2 in | |
| May | 59°F (15°C) | 5.4 in | Wettest |
| June | 69°F (20°C) | 4.9 in | |
| July | 73°F (23°C) | 4.2 in | Warmest |
| August | 71°F (22°C) | 4.4 in | |
| September | 63°F (17°C) | 3.7 in | |
| October | 51°F (10°C) | 3.0 in | |
| November | 37°F (3°C) | 2.0 in | |
| December | 26°F (-3°C) | 1.3 in |
Williamson has a seasonal temperature swing of 52°F / from 21°F in January to 73°F in July. Total annual precipitation is 37.3 inches, with May being the wettest month (5.4") and January the driest (1.0").