All Countries
Yarmouth, IA
Full City Profile · Iowa · Louisa County County
2.3
/5.0
C
Fair
94
Population
55/sq mi density
49°F
Avg Temperature
275 sunny days/yr
127
Violent Crime/100K
2,921 property/100K
C
Overall
2.3 / 5.0
Fair overall score based on economy, affordability, safety and education
F
Safety
1.0 / 5.0
127 violent crimes/100K
B+
Education
3.6 / 5.0
0.0% bachelor's degree or higher
Yarmouth experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 20°F in January while summers reach 73°F in July. The area gets 275 sunny days per year. Annual precipitation totals 38.8 inches. The area receives 31.3 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
20°F Jan (-6°C)
73°F Jul (23°C)
| Annual Average | 48.8°F |
| 10% below US avg | |
| January Average | 20°F (-6°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 811 ft (247 m) |
| Area | 1.7 sq mi (4.4 km²) |
| Population Density | 55/sq mi |
| Coordinates | 41.0245°N, 91.3221°W |
| Timezone | America/Chicago |
| County | Louisa County County |
| Nearest Airport | Southeast Iowa Regional (BRL) 20 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 17.5 / 100 |
| Social Vulnerability | 13.6 / 100 |
| Community Resilience | 58.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Very Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-6°C) | 1.3 in | Coldest |
| February | 27°F (-3°C) | 1.1 in | Driest |
| March | 39°F (4°C) | 2.7 in | |
| April | 51°F (11°C) | 3.6 in | |
| May | 63°F (17°C) | 4.0 in | |
| June | 71°F (22°C) | 3.9 in | |
| July | 73°F (23°C) | 4.2 in | Warmest |
| August | 73°F (23°C) | 4.0 in | |
| September | 65°F (18°C) | 4.3 in | Wettest |
| October | 54°F (12°C) | 2.9 in | |
| November | 39°F (4°C) | 2.2 in | |
| December | 27°F (-3°C) | 1.9 in |
Yarmouth has a seasonal temperature swing of 53°F / from 20°F in January to 73°F in July. Total annual precipitation is 36.0 inches, with September being the wettest month (4.3") and February the driest (1.1").