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Rock Island, TX
Full City Profile · Texas · Colorado County County
1.6
/5.0
D
Poor
371
Population
74/sq mi density
$38,409
Median Income
$16,920 per capita
69°F
Avg Temperature
330 sunny days/yr
165
Violent Crime/100K
1,755 property/100K
D
Overall
1.6 / 5.0
Below average overall score based on economy, affordability, safety and education
D
Economy
1.9 / 5.0
$38,409 median income, 15.9% unemployment
F
Safety
1.0 / 5.0
165 violent crimes/100K
D
Education
1.8 / 5.0
10.6% bachelor's degree or higher
Rock Island enjoys a temperate climate with an average annual temperature of 69°F (21°C). Winters average 51°F in January while summers reach 84°F in July. The area gets 330 sunny days per year. Annual precipitation totals 45.0 inches. The area receives 0.0 inches of snow annually. Air quality is rated Good with a median AQI of 42.
Temperature
51°F Jan (11°C)
84°F Jul (29°C)
| Annual Average | 68.8°F |
| 27% above US avg | |
| January Average | 51°F (11°C) |
| July Average | 84°F (29°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 228 ft (69 m) |
| Area | 5.0 sq mi (13.0 km²) |
| Population Density | 74/sq mi |
| Coordinates | 29.5138°N, 96.5671°W |
| Timezone | America/Chicago |
| County | Colorado County County |
| Nearest Airport | Wharton Regional (WHT) 31 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 62.3 / 100 |
| Social Vulnerability | 83.9 / 100 |
| Community Resilience | 40.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Moderate |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively High |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 51°F (11°C) | 3.1 in | Coldest |
| February | 54°F (12°C) | 2.7 in | |
| March | 61°F (16°C) | 2.4 in | Driest |
| April | 68°F (20°C) | 3.0 in | |
| May | 74°F (24°C) | 5.4 in | Wettest |
| June | 80°F (27°C) | 4.4 in | |
| July | 84°F (29°C) | 2.7 in | Warmest |
| August | 83°F (28°C) | 3.0 in | |
| September | 78°F (26°C) | 4.9 in | |
| October | 70°F (21°C) | 3.6 in | |
| November | 60°F (16°C) | 3.4 in | |
| December | 53°F (12°C) | 2.8 in |
Rock Island has a seasonal temperature swing of 32°F / from 51°F in January to 84°F in July. Total annual precipitation is 41.4 inches, with May being the wettest month (5.4") and March the driest (2.4").