Wet days
The number of days in the year with at least a tenth of an inch of rain or melted snow. NOAA maps each day's weather station readings onto squares about 3 miles wide and averages them over the county. Any rain at all would count too many days: the county average is above zero when a shower wets just one corner. 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 density0.47not mostly about how urban a place is
Nearby places alike0.90Moran’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), wet_days; states, counties averaged by land area
Days with at least a tenth of an inch of rain or melted snow. 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 2 pairs built from the same numbers or the same model as this measure, since they are bound to match.
| Measure | Unadjusted | Adjusted |
|---|---|---|
| Wet days and Clear daysWhere Wet days is higher, Clear days 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. Clear days by US county | -0.60 | -0.57 |
| Wet days and Cloud coverWhere Wet days is higher, Cloud cover 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. Cloud cover by US county | +0.52 | +0.51 |
| Wet days and Share Hispanic or Latino, any raceWhere Wet days is higher, Share Hispanic or Latino, any race 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 Hispanic or Latino, any race by US county | -0.45 | -0.47 |
| Wet days and Summer daily highWhere Wet days is higher, Summer daily high 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. Summer daily high by US county | -0.34 | -0.47 |
| Wet days and Area in droughtWhere Wet days is higher, Area in drought 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. Area in drought by US county | -0.54 | -0.46 |
| Wet days and Daily sunlightWhere Wet days is higher, Daily sunlight 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. Daily sunlight by US county | -0.46 | -0.45 |
| Wet days and Weeks with half the area in droughtWhere Wet days is higher, Weeks with half the area in drought 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. Weeks with half the area in drought by US county | -0.53 | -0.44 |
| Wet days and ArthritisWhere Wet days is higher, Arthritis tends to be higher: a moderate link that holds when only places with similar density, income and education are compared. Arthritis by US county | +0.39 | +0.43 |
| Wet days and Days of 90°F or hotterWhere Wet days is higher, Days of 90°F or hotter tends to be lower: a weak link that holds when only places with similar density, income and education are compared, and inside states as well. Days of 90°F or hotter by US county | -0.32 | -0.38 |
| Wet days and Cancer other than skin cancerWhere Wet days is higher, Cancer other than skin cancer 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. Cancer other than skin cancer by US county | +0.22 | +0.38 |
13 more pairs with wet days have a page: Median age · Colorectal cancer screening · Winter daily sunlight · Frequent mental distress · Share White, not Hispanic · Adults under 65 without health insurance · Current asthma · Land surface form (flat to mountainous) · Share of days with unhealthy air · Catholic adherents · Homeownership rate · Share foreign-born · Mean travel time to work.
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 |
|---|---|---|
| Wet days and Share White, not HispanicWhere Wet days is higher, Share White, 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 White, not Hispanic by US county | +0.18 | +0.35 |
| Wet days and Share Black, not HispanicCould easily be chance once only places with similar density, income and education are compared. Share Black, not Hispanic by US county | +0.17 | +0.05 |
| Wet days and Share Hispanic or Latino, any raceWhere Wet days is higher, Share Hispanic or Latino, any race 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 Hispanic or Latino, any race by US county | -0.45 | -0.47 |
| Wet days and Share Asian, not HispanicWhere Wet days is higher, Share Asian, not Hispanic tends to be lower: a weak link that holds when only places with similar density, income and education are compared. Share Asian, not Hispanic by US county | +0.01 | -0.16 |
| Wet days and Share American Indian or Alaska Native, not HispanicWhere Wet days is higher, Share American Indian or Alaska Native, not Hispanic tends to be lower: a weak link that holds when only places with similar density, income and education are compared. Share American Indian or Alaska Native, not Hispanic by US county | -0.18 | -0.10 |
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
- Tillamook County, OR — 151
- Jefferson County, WA — 148
- Clatsop County, OR — 148
- Clallam County, WA — 141
- Pacific County, WA — 139
Lowest
- El Paso County, TX — 13
- Imperial County, CA — 13
- Ward County, TX — 14
- Crane County, TX — 15
- Hudspeth County, TX — 17
The middle area reports 72. The middle half of counties falls between 58 and 84 (the 25th to 75th percentile).
US Counties With the Highest Wet Days · US Counties With the Lowest Wet Days
All measures · Explore its pairs · How the US county data works