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Dayton
Dayton, Washington
Columbia County Courthouse in Dayton
Columbia County Courthouse in Dayton
Location of Dayton, Washington
Location of Dayton, Washington
Country United States
State Washington
County Columbia
Area
 • Total 1.44 sq mi (3.73 km2)
 • Land 1.44 sq mi (3.73 km2)
 • Water 0.00 sq mi (0.00 km2)
Elevation
1,660 ft (506 m)
Population
 (2010)
 • Total 2,526
 • Estimate 
(2019)
2,442
 • Density 1,694.66/sq mi (654.48/km2)
Time zone UTC−8 (Pacific (PST))
 • Summer (DST) UTC−7 (PDT)
ZIP code
99328
Area code(s) 509
FIPS code 53-16970
GNIS feature ID 1504356
Website City of Dayton

Dayton is a city in and the county seat of Columbia County, Washington, United States. The population was 2,526 at the 2010 census.

History

Dayton-Historic-Depot
Historic railway depot in Dayton

Dayton was founded in the 1860s. A town site plat was filed by Jesse N. and Elizabeth Day on November 23, 1871. Dayton was officially incorporated on November 10, 1881 and was named for Jesse Day. Dayton has the oldest train depot (1881) in Washington State and the oldest continuously used courthouse (1887). The historical community of Baileysburg was once located about one mile southeast of Dayton, at the junction of North Touchet and South Touchet Roads.

Geography and climate

Dayton is located at 46°19′11″N 117°58′40″W / 46.31972°N 117.97778°W / 46.31972; -117.97778 (46.319608, -117.977699).

According to the United States Census Bureau, the city has a total area of 1.43 square miles (3.70 km2), all of it land. The Touchet River runs through Dayton.

Dayton is somewhat milder than most of eastern Washington in the winter and has a Mediterranean climate (Köppen Csa/Csb) with hot summers (though nights are pleasantly cool) and chilly, though not severe winters with only very moderate snowfall. Precipitation is moderate for most of the year except for a dry period between July and September when major wildfires are very common in the region with the hot days and very low humidity.

Climate data for Dayton, Washington (1971–2000)
Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Record high °F (°C) 69
(21)
74
(23)
79
(26)
93
(34)
101
(38)
107
(42)
109
(43)
114
(46)
105
(41)
92
(33)
80
(27)
69
(21)
114
(46)
Average high °F (°C) 40.2
(4.6)
45.9
(7.7)
53.5
(11.9)
61.1
(16.2)
69.1
(20.6)
77.1
(25.1)
86.6
(30.3)
86.5
(30.3)
76.9
(24.9)
64.3
(17.9)
48.7
(9.3)
40.5
(4.7)
62.5
(17.0)
Daily mean °F (°C) 33.2
(0.7)
37.7
(3.2)
43.8
(6.6)
49.9
(9.9)
56.9
(13.8)
63.8
(17.7)
70.9
(21.6)
70.8
(21.6)
62.2
(16.8)
51.5
(10.8)
40.9
(4.9)
33.8
(1.0)
51.3
(10.7)
Average low °F (°C) 26.2
(−3.2)
29.4
(−1.4)
34.1
(1.2)
38.7
(3.7)
44.7
(7.1)
50.4
(10.2)
55.2
(12.9)
55.0
(12.8)
47.5
(8.6)
38.7
(3.7)
33.0
(0.6)
27.0
(−2.8)
40.0
(4.5)
Record low °F (°C) −22
(−30)
−22
(−30)
5
(−15)
17
(−8)
23
(−5)
29
(−2)
34
(1)
34
(1)
24
(−4)
7
(−14)
−10
(−23)
−25
(−32)
−25
(−32)
Average precipitation inches (mm) 2.38
(60)
1.88
(48)
2.12
(54)
1.58
(40)
1.56
(40)
1.28
(33)
0.46
(12)
0.53
(13)
0.92
(23)
1.65
(42)
2.53
(64)
2.44
(62)
19.33
(491)
Average snowfall inches (cm) 6.1
(15)
3.1
(7.9)
1.1
(2.8)
0
(0)
0
(0)
0
(0)
0
(0)
0
(0)
0
(0)
0.1
(0.25)
1.3
(3.3)
6.1
(15)
17.8
(44.25)
Average precipitation days (≥ 0.01 inch) 13.7 12.5 13.5 11.0 10.4 8.2 4.2 4.1 5.7 8.3 15.9 14.4 121.9
Average snowy days (≥ 0.1 inch) 3.4 1.7 0.8 0 0 0 0 0 0 0 1.2 3.3 10.4
Source: National Climatic Data Center

Demographics

Historical population
Census Pop.
1880 996
1890 1,880 88.8%
1900 2,216 17.9%
1910 2,389 7.8%
1920 2,695 12.8%
1930 2,528 −6.2%
1940 3,026 19.7%
1950 2,979 −1.6%
1960 2,913 −2.2%
1970 2,596 −10.9%
1980 2,565 −1.2%
1990 2,468 −3.8%
2000 2,655 7.6%
2010 2,526 −4.9%
2019 (est.) 2,442 −3.3%
U.S. Decennial Census
2015 Estimate

2010 census

At the 2010 census there were 2,526 people, 1,082 households, and 670 families living in the city. The population density was 1,766.4 inhabitants per square mile (682.0/km2). There were 1,200 housing units at an average density of 839.2 per square mile (324.0/km2). The racial makeup of the city was 91.6% White, 0.4% African American, 1.9% Native American, 0.6% Asian, 0.6% Pacific Islander, 1.8% from other races, and 3.2% from two or more races. Hispanic or Latino of any race were 7.1%.

Of the 1,082 households 25.7% had children under the age of 18 living with them, 47.0% were married couples living together, 10.8% had a female householder with no husband present, 4.2% had a male householder with no wife present, and 38.1% were non-families. 33.1% of households were one person and 15.8% were one person aged 65 or older. The average household size was 2.27 and the average family size was 2.85.

The median age was 46.3 years. 21.6% of residents were under the age of 18; 6.2% were between the ages of 18 and 24; 20.1% were from 25 to 44; 30% were from 45 to 64; and 22.2% were 65 or older. The gender makeup of the city was 49.0% male and 51.0% female.

Notable residents

See also

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