Yarmouth, IA
Full City Profile · Iowa · Louisa County County
3.6
/5.0
B+
Good
94
Population
55/sq mi density
50°F
Avg Temperature
B+
Overall
3.6 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Education
3.6 / 5.0
0.0% bachelor's degree or higher
Yarmouth experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 22°F in January while summers reach 74°F in July. Annual precipitation totals 38.4 inches. The area receives 35.5 inches of snow annually.
Temperature
22°F Jan (-6°C)
74°F Jul (23°C)
| Annual Average | 49.7°F |
| 8% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 74°F (23°C) |
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
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 | 22°F (-6°C) | 1.3 in | Coldest, Driest |
| February | 27°F (-3°C) | 2.0 in | |
| March | 38°F (3°C) | 2.6 in | |
| April | 50°F (10°C) | 3.6 in | |
| May | 61°F (16°C) | 5.2 in | |
| June | 70°F (21°C) | 5.2 in | Wettest |
| July | 74°F (23°C) | 3.9 in | Warmest |
| August | 72°F (22°C) | 4.0 in | |
| September | 65°F (18°C) | 3.6 in | |
| October | 52°F (11°C) | 3.0 in | |
| November | 39°F (4°C) | 2.2 in | |
| December | 28°F (-3°C) | 1.9 in |
Yarmouth has a seasonal temperature swing of 52°F / from 22°F in January to 74°F in July. Total annual precipitation is 38.4 inches, with June being the wettest month (5.2") and January the driest (1.3").