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Tiffin, IA
Full City Profile · Iowa · Johnson County County
4.0
/5.0
A
Great
5,271
Population
1,220/sq mi density
$106,034
Median Income
$62,159 per capita
$315,800
Home Value
$324,790 Zillow
$1,367
Median Rent
16.3% income on rent
51°F
Avg Temperature
275 sunny days/yr
345
Violent Crime/100K
866 property/100K
A
Overall
4.0 / 5.0
Strong
A+
Economy
5.0 / 5.0
$106,034 median income, 0.4% unemployment
A+
Affordability
5.0 / 5.0
$315,800 home value, $1,367/mo rent
F
Safety
1.0 / 5.0
345 violent crimes/100K
A+
Education
5.0 / 5.0
60.6% bachelor's degree or higher
Tiffin experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 23°F in January while summers reach 76°F in July. The area gets 275 sunny days per year. Annual precipitation totals 35.7 inches. Air quality is rated Good with a median AQI of 43.
Temperature
23°F Jan (-5°C)
76°F Jul (24°C)
| Annual Average | 51.0°F |
| 6% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 683 ft (208 m) |
| Area | 4.1 sq mi (10.7 km²) |
| Population Density | 1,220/sq mi |
| Coordinates | 41.7050°N, 91.6544°W |
| Timezone | America/Chicago |
| County | Johnson County County |
| Nearest Airport | The Eastern Iowa (CID) 14 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| PM2.5 (Fine Particles) | 10.3 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 87.4 / 100 |
| Social Vulnerability | 11.4 / 100 |
| Community Resilience | 96.7 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Relatively Moderate |
| Hail | Relatively High |
| Strong Wind | Very High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 1.1 in | Coldest |
| February | 26°F (-4°C) | 1.1 in | Driest |
| March | 38°F (3°C) | 2.3 in | |
| April | 50°F (10°C) | 3.5 in | |
| May | 61°F (16°C) | 4.1 in | |
| June | 71°F (22°C) | 4.6 in | Wettest |
| July | 76°F (24°C) | 4.5 in | Warmest |
| August | 73°F (23°C) | 4.3 in | |
| September | 64°F (18°C) | 4.0 in | |
| October | 53°F (12°C) | 2.7 in | |
| November | 38°F (3°C) | 2.2 in | |
| December | 25°F (-4°C) | 1.6 in |
Tiffin has a seasonal temperature swing of 53°F / from 23°F in January to 76°F in July. Total annual precipitation is 35.8 inches, with June being the wettest month (4.6") and February the driest (1.1").