Share White, not Hispanic and Clear days
Where Share White, not Hispanic is higher, Clear days tends to be lower. The link is weak: -0.38 across 3,119 counties, on a scale from −1 (opposite) to +1 (in step). That figure compares places with the same population density, income and education, so those differences can't explain it. It holds inside states too. Measured separately within each of 40 states, the middle value of the link is -0.13.
Holds after adjusting
Every place, plotted
One dot for each place reporting both measures. Hover over or tap a dot to see its name and values. The thin line is the straight line that best fits the dots. The bold line, shown for counties, is the link after adjusting for density, income and education. A dot far from the lines is a place that does not follow the pattern.
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What each measure is
Share White, not Hispanic
The percentage of residents who are White alone and not Hispanic or Latino. It comes from a table that sorts people by both race and Hispanic origin, so nobody is counted twice. The eight race and ethnicity shares here add up to exactly 100% in every county.
Census ACS 5-year · ACS table B03002_003, divided by total population
Clear days
The number of days in the year when clouds blocked less than 7% of the sunlight, so the ground got at least 93% of what a cloudless sky would give. It is the closest measure here to a count of sunny days. It is a NASA estimate from weather satellites for squares of land about 60 miles across, not a count by someone watching the sky, and nearby counties often share a value. The 93% line was chosen so that, on average, the count matches NOAA's counts of clear days at 64 weather stations. There, a clear day is one with three tenths of the sky or less covered by cloud in daylight. It starts in 2001, since the older satellites count clear days differently.
NASA POWER (Prediction Of Worldwide Energy Resources) · NASA POWER daily regional API, community RE, ALLSKY_SFC_SW_DWN / CLRSKY_SFC_SW_DWN
Highest and lowest
Where each measure is highest and lowest among the places reporting both (2023), with the other measure beside it. This is shown for every size of place where both are published. Metro-area values are added up from their counties. A measure that cannot be added up across counties, such as a middle value (median), has no metro figure. Counts are shown per 1,000 residents, since raw totals would only list the largest places. Cities and towns and ZIP codes are shown where the Census survey or the CDC publishes them; most other sources stop at the county. They are shown for places of 5,000 residents or more, and only where the survey’s margin of error is small enough for the figure to be usable. The CDC publishes its health estimates for cities in a version adjusted for age, so places with older or younger people can be compared fairly, but not for ZIP codes.
Counties
By share White, not Hispanic
| Share White, not Hispanic | Clear days | |
|---|---|---|
| Highest | ||
| Blaine County, NE | 100% | 151 |
| McPherson County, NE | 99.4% | 147 |
| Petroleum County, MT | 99.3% | 101 |
| Rock County, NE | 98.4% | 138 |
| Garfield County, MT | 97.8% | 117 |
| Lowest | ||
| Starr County, TX | 2.15% | 158 |
| Maverick County, TX | 2.84% | 168 |
| Kusilvak Census Area, AK | 3.07% | 27 |
| Webb County, TX | 3.57% | 164 |
| Zapata County, TX | 4.57% | 169 |
By clear days
| Share White, not Hispanic | Clear days | |
|---|---|---|
| Highest | ||
| Yuma County, AZ | 29.6% | 273 |
| La Paz County, AZ | 57.8% | 272 |
| Imperial County, CA | 9.42% | 258 |
| Maricopa County, AZ | 53.4% | 254 |
| Gila County, AZ | 62% | 236 |
| Lowest | ||
| Juneau City and Borough, AK | 61.8% | 3 |
| Hoonah-Angoon Census Area, AK | 49.2% | 3 |
| Aleutians West Census Area, AK | 23.7% | 5 |
| Aleutians East Borough, AK | 15.4% | 6 |
| Kodiak Island Borough, AK | 46% | 8 |
States
By share White, not Hispanic
| Share White, not Hispanic | Clear days | |
|---|---|---|
| Highest | ||
| Maine | 90.6% | 81 |
| Vermont | 90.6% | 62 |
| West Virginia | 90.2% | 84 |
| New Hampshire | 87.5% | 84 |
| Montana | 84.1% | 82 |
| Lowest | ||
| Hawaii | 21.1% | 80 |
| California | 34.6% | 168 |
| New Mexico | 36.5% | 168 |
| District of Columbia | 36.6% | 97 |
| Texas | 39.9% | 145 |
By clear days
| Share White, not Hispanic | Clear days | |
|---|---|---|
| Highest | ||
| Arizona | 53.4% | 241 |
| Nevada | 46% | 186 |
| New Mexico | 36.5% | 168 |
| California | 34.6% | 168 |
| Oklahoma | 62.8% | 158 |
| Lowest | ||
| Alaska | 58.3% | 17 |
| Vermont | 90.6% | 62 |
| Michigan | 73% | 79 |
| Hawaii | 21.1% | 80 |
| Maine | 90.6% | 81 |
Metro areas
By share White, not Hispanic
| Share White, not Hispanic | Clear days | |
|---|---|---|
| Highest | ||
| Pikeville, KY | 95.3% | 82 |
| Greenville, OH | 95.1% | 106 |
| Effingham, IL | 94.9% | 124 |
| Warren, PA | 94.9% | 77 |
| Wapakoneta, OH | 94.8% | 106 |
| Lowest | ||
| Rio Grande City-Roma, TX | 2.15% | 158 |
| Eagle Pass, TX | 2.84% | 168 |
| Laredo, TX | 3.57% | 164 |
| Zapata, TX | 4.57% | 169 |
| McAllen-Edinburg-Mission, TX | 6.08% | 158 |
By clear days
| Share White, not Hispanic | Clear days | |
|---|---|---|
| Highest | ||
| Yuma, AZ | 29.6% | 273 |
| El Centro, CA | 9.42% | 258 |
| Phoenix-Mesa-Chandler, AZ | 53.6% | 252 |
| Payson, AZ | 62% | 236 |
| Lake Havasu City-Kingman, AZ | 75.6% | 234 |
| Lowest | ||
| Juneau, AK | 61.8% | 3 |
| Anchorage, AK | 61% | 11 |
| Hilo-Kailua, HI | 30% | 14 |
| Fairbanks-College, AK | 67.5% | 29 |
| Ketchikan, AK | 61.4% | 33 |
Cities and towns — Clear days is not published for cities and towns
By share White, not Hispanic
| Share White, not Hispanic | Clear days | |
|---|---|---|
| Highest | ||
| Treasure Lake CDP, PA | 99.2% | — |
| Litchfield city, IL | 98.8% | — |
| Cicero town, IN | 98.2% | — |
| East Harwich CDP, MA | 98.1% | — |
| Wellston city, OH | 98.1% | — |
| Lowest | ||
| Mecca CDP, CA | 0% | — |
| Earlimart CDP, CA | 0% | — |
| Yabucoa zona urbana, PR | 0% | — |
| San Lorenzo zona urbana, PR | 0% | — |
| San Isidro comunidad, PR | 0% | — |
ZIP codes — Clear days is not published for ZIP codes
By share White, not Hispanic
| Share White, not Hispanic | Clear days | |
|---|---|---|
| Highest | ||
| ZIP 62056 (Montgomery County, IL) | 99% | — |
| ZIP 47558 (Daviess County, IN) | 98.9% | — |
| ZIP 47452 (Orange County, IN) | 98.7% | — |
| ZIP 44627 (Holmes County, OH) | 98.6% | — |
| ZIP 24609 (Tazewell County, VA) | 98.5% | — |
| Lowest | ||
| ZIP 00952 (Sabana Seca comunidad, PR) | 0% | — |
| ZIP 00782 (Comerío Municipio, PR) | 0% | — |
| ZIP 00780 (Ponce Municipio, PR) | 0% | — |
| ZIP 00731 (Ponce Municipio, PR) | 0% | — |
| ZIP 00723 (Patillas Municipio, PR) | 0% | — |
Counties furthest from the pattern
Compared with the straight line that best fits all 3,139 counties: the five with far more clear days than their share White, not Hispanic would suggest, and the five with far less.
| Share White, not Hispanic | Clear days | |
|---|---|---|
| Above the line | ||
| La Paz County, AZ | 57.8% | 272 |
| Yuma County, AZ | 29.6% | 273 |
| Maricopa County, AZ | 53.4% | 254 |
| Mohave County, AZ | 75.6% | 234 |
| Gila County, AZ | 62% | 236 |
| Below the line | ||
| Aleutians East Borough, AK | 15.4% | 6 |
| Aleutians West Census Area, AK | 23.7% | 5 |
| Kusilvak Census Area, AK | 3.07% | 27 |
| Hoonah-Angoon Census Area, AK | 49.2% | 3 |
| Nome Census Area, AK | 13.8% | 22 |
Two series, one county
Both measures over time for a county you pick. The two charts are stacked, so they share only the years along the bottom. You can pick from the thirty largest counties reporting both. This panel covers 2010–2024, and a measure published only once shows as a single dot.
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Every version of the link
Each row measures the same link, from −1 to +1, in a different way. If the rows mostly agree, the link does not depend on one choice of method.
| Before adjusting for anything | -0.331 | 3,119 counties reporting both |
| After adjusting for density, income and education | -0.376 | the part of the link that is not just how urban, rich and educated a place is |
| Also adjusting for population size | -0.377 | size taken out as well as density |
| Also comparing only within each state | -0.197 | each county is compared only with others in its own state, so this is no longer a comparison between states |
| Also holding winter sunshine equal | — | compares counties that get the same sunlight in winter as well. If this is much weaker, part of the link is a difference between sunny and grey regions (more) |
| Giving bigger counties more weight | -0.462 | the adjusted link for the average resident rather than the average county. With this weighting, the data counts for about 287 equally weighted counties |
| Middle value inside single states | -0.129 | the link worked out inside each of 40 states with at least 20 counties reporting |
| Using ranks, after adjusting | -0.405 | uses each county’s rank, not its value, so a few extreme counties cannot create the link |
How much to believe it
Could it be chance?
The p-value is the chance of seeing a link this strong if there were really none. A value of 0.05 or less means the link is unlikely to be chance. Very small values are written in short form: 3.1e-16 means 0.00000000000000031, and the bigger the number after “e-”, the smaller the value. Treating every county as a separate case gives p = 1.8e-105. But counties in the same state tend to resemble each other, so the better figure allows for that: p = 0.002. The site tested 32,131 pairs, and testing so many turns up some flukes. The q-value allows for that too. For this pair it is 1.8e-104.
Do nearby places look alike?
Moran’s I measures how much nearby places look alike: 0 means no map pattern, and higher means neighbours are more similar. For the part of each county that the adjustment leaves unexplained, it is +0.82 (p = 0.001). That unexplained part still clusters on the map. So some regional factor shared by both measures is not accounted for.
Did they change together?
The figures above compare counties at one moment. This asks a different question: where share White, not Hispanic rose most, did clear daysmove too? Each county’s change is compared with the average change in its own state. That takes out ups and downs that hit a whole region at once. Each change is the gap between two estimates that both contain some error. That error pulls these links towards zero, so a weak one is weak partly for that reason. The q column shows whether a link could be a fluke, allowing for the many pairs tested: 0.05 or less means it is unlikely to be chance.
| Period | Counties | Change together | Within states | q |
|---|---|---|---|---|
| 2014–2019 the main test: each Census survey figure averages five years, and these two do not overlap; before the pandemic | 3,139 | +0.06 | -0.03 | 0.596 |
| 2019–2023 a repeat check: its two five-year survey figures both include 2019, and it covers the COVID years | 3,137 | +0.02 | +0.01 | 0.868 |
Over the main period, any link between the changes could easily be chance. How change is measured.
Related pairs
- Summer daily high and Clear days — +0.77
- Share White, not Hispanic and Returns claiming the earned income credit — -0.73
- Share White, not Hispanic and Material security score — +0.68
- Share White, not Hispanic and Average test score — +0.66
- Share White, not Hispanic and Children in single-parent households — -0.65
- Days of 90°F or hotter and Clear days — +0.64
- Share White, not Hispanic and Economic connectedness — +0.62
- Share White, not Hispanic and Republican share of the two-party vote, 2016 — +0.61
Association only. Nothing here shows that either measure changes the other. This describes counties, not the people in them. Two measures going together across places does not mean the same people have both. How the US county data works · Explore Share White, not Hispanic and Clear days