Days of 90°F or hotter
The number of days in the year when the high temperature reached 90°F or more. The high is the average over the county of NOAA's daily map of weather station readings, made of squares about 3 miles wide. So a county with hot valleys and cool mountains counts fewer days than its hottest town. A state's figure is the average of its counties, each weighted by its land area. Lower 48 states only, from 1951.
Reported for3,108areas, in 49 states — none in AK, HI, PR
Link to density0.13not mostly about how urban a place is
Nearby places alike0.96Moran’s I: strongly, neighbouring places tend to be similar
Typeratedays
How it has moved
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Every state, every year
One row per state and one column per year, sorted by the latest value. It shows states, not counties: nobody can scan 3,222 rows, and the pattern only shows when it all fits on one screen.
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Where it comes from
NOAA NCEI nClimGrid-Daily · NOAA NCEI nClimGrid-Daily v1.0.0 county averages (prcp/tmax/tmin, scaled), hot_days; states, counties averaged by land area
Days whose high reached 90°F. Counted on the county's average, so combined areas are weighted by their size.
Combining areas: an average weighted by NCLIMGRID.LAND_SQKM.
What it goes with
The strongest links that have a page of their own. Unadjusted is the link before adjusting for anything, from −1 (opposite) to +1 (in step). Adjusted compares places with the same population density, income and education levels, so those differences can’t explain the link. This list leaves out the 1 pairs built from the same numbers or the same model as this measure, since they are bound to match.
| Measure | Unadjusted | Adjusted |
|---|---|---|
| Days of 90°F or hotter and Cooling degree daysWhere Days of 90°F or hotter is higher, Cooling degree days tends to be higher: a strong link that holds when only places with similar density, income and education are compared, and inside states as well. Cooling degree days by US county | +0.94 | +0.95 |
| Days of 90°F or hotter and Average temperatureWhere Days of 90°F or hotter is higher, Average temperature tends to be higher: a strong link that holds when only places with similar density, income and education are compared, and inside states as well. Average temperature by US county | +0.82 | +0.88 |
| Days of 90°F or hotter and Heating degree daysWhere Days of 90°F or hotter is higher, Heating degree days tends to be lower: a strong link that holds when only places with similar density, income and education are compared, and inside states as well. Heating degree days by US county | -0.73 | -0.80 |
| Days of 90°F or hotter and Winter daily sunlightWhere Days of 90°F or hotter is higher, Winter daily sunlight tends to be higher: a strong link that holds when only places with similar density, income and education are compared, and inside states as well. Winter daily sunlight by US county | +0.79 | +0.79 |
| Days of 90°F or hotter and Freezing daysWhere Days of 90°F or hotter is higher, Freezing days tends to be lower: a strong link that holds when only places with similar density, income and education are compared, and inside states as well. Freezing days by US county | -0.65 | -0.74 |
| Days of 90°F or hotter and Daily sunlightWhere Days of 90°F or hotter is higher, Daily sunlight tends to be higher: a strong link that holds when only places with similar density, income and education are compared, and inside states as well. Daily sunlight by US county | +0.74 | +0.74 |
| Days of 90°F or hotter and Winter nightly lowWhere Days of 90°F or hotter is higher, Winter nightly low tends to be higher: a strong link that holds when only places with similar density, income and education are compared, and inside states as well. Winter nightly low by US county | +0.64 | +0.73 |
| Days of 90°F or hotter and Cloud coverWhere Days of 90°F or hotter is higher, Cloud cover tends to be lower: a moderate link that holds when only places with similar density, income and education are compared, and inside states as well. Cloud cover by US county | -0.68 | -0.69 |
| Days of 90°F or hotter and Clear daysWhere Days of 90°F or hotter is higher, Clear days tends to be higher: a moderate link that holds when only places with similar density, income and education are compared, and inside states as well. Clear days by US county | +0.62 | +0.64 |
| Days of 90°F or hotter and Adults under 65 without health insuranceWhere Days of 90°F or hotter is higher, Adults under 65 without health insurance tends to be higher: a moderate link that holds when only places with similar density, income and education are compared, and inside states as well. Adults under 65 without health insurance by US county | +0.66 | +0.63 |
48 more pairs with days of 90°F or hotter have a page: Share White, not Hispanic · Cancer other than skin cancer · Housing insecurity · Food insecurity · Lacking social and emotional support · Returns claiming the earned income credit · Medicare spending per enrollee · Share Hispanic or Latino, any race · Vision disability · Threat of utility shut-off · Lack of reliable transportation · Fair or poor self-rated health · Diagnosed diabetes · Current asthma · No leisure-time physical activity · Mobility disability · Dental visit in the past year · Self-care disability · Loneliness · Wet days · People per tax return · Depression · Land surface form (flat to mountainous) · Colorectal cancer screening · Disability-free score · Material security score · Share foreign-born · Longest dry spell · Any disability · Share Black, not Hispanic · High blood pressure · Child poverty rate, ages 0-17 · High cholesterol · Prison population rate · Economic connectedness · Area in drought · Children in single-parent households · Share separated · Social connection score · Average test score · Median gross rent · Sleeping less than 7 hours · Burglary rate · Weeks with half the area in drought · Community resilience to disasters · Returns claiming charitable contributions · Stroke · Median household income (model-based).
Population makeup
How this measure varies with the racial and ethnic makeup of counties. Every group is shown, whatever its rank. These are links across counties: they describe places, not people. They say nothing about any person’s risk or behaviour based on their race. Counties with a larger share of one group also differ in much else, such as income, segregation, region and history. The adjusted figure only accounts for density, income and education.
| Share of residents | Unadjusted | Adjusted |
|---|---|---|
| Days of 90°F or hotter and Share White, not HispanicWhere Days of 90°F or hotter is higher, Share White, not Hispanic tends to be lower: a moderate link that holds when only places with similar density, income and education are compared, and inside states as well. Share White, not Hispanic by US county | -0.57 | -0.59 |
| Days of 90°F or hotter and Share Black, not HispanicWhere Days of 90°F or hotter is higher, Share Black, not Hispanic tends to be higher: a weak link that holds when only places with similar density, income and education are compared, and inside states as well. Share Black, not Hispanic by US county | +0.38 | +0.36 |
| Days of 90°F or hotter and Share Hispanic or Latino, any raceWhere Days of 90°F or hotter is higher, Share Hispanic or Latino, any race tends to be higher: a moderate link that holds when only places with similar density, income and education are compared, and inside states as well. Share Hispanic or Latino, any race by US county | +0.48 | +0.51 |
| Days of 90°F or hotter and Share Asian, not HispanicCould easily be chance once only places with similar density, income and education are compared. Share Asian, not Hispanic by US county | -0.03 | +0.10 |
| Days of 90°F or hotter and Share American Indian or Alaska Native, not HispanicCould easily be chance once only places with similar density, income and education are compared. Share American Indian or Alaska Native, not Hispanic by US county | -0.04 | -0.08 |
Highest and lowest
Of 3,108 counties reporting it. These are the two ends of a national ranking. For most measures, that ranking mostly sorts places by income and how urban they are. That is why the place pages compare each place with similar places instead.
Highest
- Starr County, TX — 196
- Zapata County, TX — 192
- Hidalgo County, TX — 189
- Brooks County, TX — 187
- Jim Hogg County, TX — 186
Lowest
The middle area reports 22. The middle half of counties falls between 8 and 63.3 (the 25th to 75th percentile).
US Counties With the Highest Days of 90°F or Hotter · US Counties With the Lowest Days of 90°F or Hotter
All measures · Explore its pairs · How the US county data works