Promise City, IA
Full City Profile · Iowa · Wayne County County
3.3
/5.0
B
Good
86
Population
478/sq mi density
$41,406
Median Income
$27,769 per capita
$52,800
Home Value
$223,336 Zillow
50°F
Avg Temperature
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
B
Economy
3.2 / 5.0
$41,406 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$52,800 home value, /mo rent
D
Education
1.6 / 5.0
7.5% bachelor's degree or higher
Promise City experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 22°F in January while summers reach 75°F in July. Annual precipitation totals 40.4 inches. The area receives 21.5 inches of snow annually.
Temperature
22°F Jan (-5°C)
75°F Jul (24°C)
| Annual Average | 49.9°F |
| 8% below US avg | |
| January Average | 22°F (-5°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 1,054 ft (321 m) |
| Area | 0.2 sq mi (0.5 km²) |
| Population Density | 478/sq mi |
| Coordinates | 40.7476°N, 93.1483°W |
| Timezone | America/Chicago |
| County | Wayne County County |
| Nearest Airport | Ottumwa Regional (OTM) 44 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 22.0 / 100 |
| Social Vulnerability | 73.9 / 100 |
| Community Resilience | 46.2 / 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 | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-5°C) | 1.1 in | Coldest, Driest |
| February | 27°F (-3°C) | 1.5 in | |
| March | 38°F (4°C) | 2.4 in | |
| April | 50°F (10°C) | 4.0 in | |
| May | 61°F (16°C) | 5.7 in | Wettest |
| June | 70°F (21°C) | 5.1 in | |
| July | 75°F (24°C) | 4.7 in | Warmest |
| August | 73°F (23°C) | 4.9 in | |
| September | 65°F (18°C) | 4.2 in | |
| October | 53°F (11°C) | 3.1 in | |
| November | 39°F (4°C) | 2.2 in | |
| December | 28°F (-2°C) | 1.6 in |
Promise City has a seasonal temperature swing of 52°F / from 22°F in January to 75°F in July. Total annual precipitation is 40.4 inches, with May being the wettest month (5.7") and January the driest (1.1").