Hot-summer humid continental
Johnston, Iowa
Polk County, Iowa · Population 24k · 823 ft elevation
Living in Johnston
Johnston has a hot-summer humid continental climate: hot summers (July highs around 85°F) and cold winters (January lows around 14°F).
Precipitation is wet at about 36″ a year, and it gets a fair bit of snow (38″ a season).
Skies are sunny (62% of possible sunshine). Summers get sticky, with about 36 muggy days a year.
Air quality is moderate: a median AQI of 44, with about 2 unhealthy-air days in the latest year.
Johnston at a glance
- Population
- 24k
- Elevation
- 823 ft
- Average daily high
- 60°F18th percentile
- Average daily low
- 41°F25th percentile
- Annual precipitation
- 36″28th percentile
- Annual snowfall
- 38″78th percentile
- Sunshine hours per year
- 2,800 hrs49th percentile
- Median AQI
- 4462th percentile
- Median home value
- $346k65th percentile
- Median rent
- $1,288/mo56th percentile
- Median household income
- $103k76th percentile
- Property tax rate
- 1.90%87th percentile
- Top state income-tax rate
- 3.8%
- Sales tax (state + local)
- 6.9%
- Unemployment rate
- 1.8%
- Homes with broadband
- 94%69th percentile
- Walkability index
- 12.783th percentile
- Average commute
- 19 min
- Math proficiency (8th grade)
- 85%96th percentile
- Reading proficiency (8th grade)
- 83%
- Violent crime rate
- 83 per 100k26th percentile
- Property crime rate
- 676 per 100k
- Overall natural-hazard risk
- 9254th percentile
- Outdoor access
- 3232th percentile
- Public land within 10 miles
- 3%
- Public land within 30 miles
- 3%
- Mountain relief within 30 miles
- 295 ft
Climate by month
| Month | High | Low | Precipitation | Snow | Sunshine |
|---|---|---|---|---|---|
| Jan | 30°F | 14°F | 1.0″ | 9.7″ | 162 hrs |
| Feb | 36°F | 18°F | 1.3″ | 10.5″ | 183 hrs |
| Mar | 49°F | 29°F | 2.1″ | 5.0″ | 208 hrs |
| Apr | 62°F | 41°F | 4.0″ | 1.6″ | 225 hrs |
| May | 72°F | 52°F | 4.8″ | 0.2″ | 268 hrs |
| Jun | 81°F | 62°F | 5.3″ | — | 306 hrs |
| Jul | 85°F | 66°F | 4.3″ | — | 338 hrs |
| Aug | 83°F | 64°F | 4.0″ | — | 306 hrs |
| Sep | 77°F | 56°F | 3.4″ | — | 266 hrs |
| Oct | 64°F | 43°F | 2.5″ | 0.5″ | 209 hrs |
| Nov | 48°F | 30°F | 1.9″ | 2.2″ | 175 hrs |
| Dec | 36°F | 19°F | 1.5″ | 8.3″ | 153 hrs |
Near Johnston
- Grimes, IA · 16k
- Urbandale, IA · 46k
- Saylorville, IA · 3.6k
- Windsor Heights, IA · 5.2k
- Polk City, IA · 5.8k
- Clive, IA · 19k
- Ankeny, IA · 71k
- Des Moines, IA · 212k
Largest places in Iowa
- Cedar Rapids, IA · 137k
- Davenport, IA · 101k
- Sioux City, IA · 86k
- Iowa City, IA · 75k
- West Des Moines, IA · 70k
- Waterloo, IA · 67k
- Ames, IA · 66k
- Council Bluffs, IA · 63k
Sources: NOAA climate normals, NASA POWER, EPA air quality, U.S. Census Bureau, FEMA, FBI, EPA walkability and EDFacts. Methodology