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Thayer, IA
Full City Profile · Iowa · Union County County
2.8
/5.0
C+
Fair
50
Population
357/sq mi density
$52,500
Median Income
$13,806 per capita
$26,000
Home Value
$228,408 Zillow
49°F
Avg Temperature
275 sunny days/yr
159
Violent Crime/100K
1,746 property/100K
C+
Overall
2.8 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.7 / 5.0
$52,500 median income, 4.2% unemployment
A+
Affordability
5.0 / 5.0
$26,000 home value, /mo rent
F
Safety
1.0 / 5.0
159 violent crimes/100K
F
Education
1.3 / 5.0
4.2% bachelor's degree or higher
Thayer experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 21°F in January while summers reach 74°F in July. The area gets 275 sunny days per year. Annual precipitation totals 37.9 inches. Air quality is rated Good with a median AQI of 43.
Temperature
21°F Jan (-6°C)
74°F Jul (23°C)
| Annual Average | 48.8°F |
| 10% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 1,122 ft (342 m) |
| Area | 0.1 sq mi (0.2 km²) |
| Population Density | 357/sq mi |
| Coordinates | 41.0287°N, 94.0499°W |
| Timezone | America/Chicago |
| County | Union County County |
| Nearest Airport | Des Moines International (DSM) 37 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 49.5 / 100 |
| Social Vulnerability | 74.2 / 100 |
| Community Resilience | 76.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively High |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 0.9 in | Coldest, Driest |
| February | 27°F (-3°C) | 1.0 in | |
| March | 38°F (4°C) | 2.2 in | |
| April | 50°F (10°C) | 3.4 in | |
| May | 61°F (16°C) | 4.2 in | |
| June | 70°F (21°C) | 4.5 in | Wettest |
| July | 74°F (23°C) | 4.3 in | Warmest |
| August | 73°F (23°C) | 3.8 in | |
| September | 65°F (18°C) | 4.3 in | |
| October | 53°F (12°C) | 2.6 in | |
| November | 38°F (3°C) | 2.0 in | |
| December | 26°F (-4°C) | 1.3 in |
Thayer has a seasonal temperature swing of 54°F / from 21°F in January to 74°F in July. Total annual precipitation is 34.4 inches, with June being the wettest month (4.5") and January the driest (0.9").