Martinsburg, IA
Full City Profile · Iowa · Keokuk County County
3.1
/5.0
B
Good
96
Population
259/sq mi density
$43,281
Median Income
$21,372 per capita
$52,500
Home Value
$84,874 Zillow
51°F
Avg Temperature
B
Overall
3.1 / 5.0
Good overall score based on economy, affordability, safety and education
C+
Economy
2.7 / 5.0
$43,281 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$52,500 home value, /mo rent
D
Education
1.5 / 5.0
6.7% bachelor's degree or higher
Martinsburg experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 23°F in January while summers reach 75°F in July. Annual precipitation totals 37.0 inches. The area receives 23.6 inches of snow annually.
Temperature
23°F Jan (-5°C)
75°F Jul (24°C)
| Annual Average | 50.7°F |
| 6% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 805 ft (245 m) |
| Area | 0.4 sq mi (1.0 km²) |
| Population Density | 259/sq mi |
| Coordinates | 41.1788°N, 92.2519°W |
| Timezone | America/Chicago |
| County | Keokuk County County |
| Nearest Airport | Ottumwa Regional (OTM) 11 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 21.9 / 100 |
| Social Vulnerability | 21.6 / 100 |
| Community Resilience | 81.3 / 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 | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 1.0 in | Coldest, Driest |
| February | 27°F (-3°C) | 1.4 in | |
| March | 40°F (4°C) | 2.2 in | |
| April | 51°F (11°C) | 3.8 in | |
| May | 62°F (17°C) | 5.0 in | |
| June | 72°F (22°C) | 5.4 in | Wettest |
| July | 75°F (24°C) | 3.9 in | Warmest |
| August | 73°F (23°C) | 4.4 in | |
| September | 65°F (19°C) | 3.5 in | |
| October | 53°F (12°C) | 2.8 in | |
| November | 40°F (4°C) | 2.1 in | |
| December | 28°F (-2°C) | 1.4 in |
Martinsburg has a seasonal temperature swing of 52°F / from 23°F in January to 75°F in July. Total annual precipitation is 37.0 inches, with June being the wettest month (5.4") and January the driest (1.0").