A | B | C | D | E | F | G | H | CH | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
Dauphin County | |
|---|---|
 Dauphin County Courthouse in Harrisburg | |
 Flag  Seal | |
 Location within the U.S. state of Pennsylvania | |
 Pennsylvania's location within the U.S. | |
| Coordinates: 40°25′N 76°47′W / 40.41°N 76.79°W | |
| Country |  United States |
| State |  Pennsylvania |
| Founded | March 4, 1785 |
| Named for | Louis Joseph, Dauphin of France |
| Seat | Harrisburg |
| Largest township | Lower Paxton Township |
| Area | |
| • Total | 558 sq mi (1,450 km2) |
| • Land | 525 sq mi (1,360 km2) |
| • Water | 33 sq mi (90 km2) 5.9% |
| Population | |
| • Estimate (2023) | 289,234 |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional district | 10th |
| Website | www |
| Designated | December 9, 1982[1] |
Dauphin County (/ˈdɔːfɪn/; Pennsylvania Dutch: Daffin Kaundi) is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 286,401.[2] The county seat is Harrisburg,[3] Pennsylvania's state capital and ninth-most populous city. The county was created on March 4, 1785, from part of Lancaster County and was named after Louis Joseph, Dauphin of France,[4] the first son of King Louis XVI. The county is part of the South Central Pennsylvania region of the state.[a]
Dauphin County is included in the Harrisburg–Carlisle Metropolitan Statistical Area.
Located within the county is Three Mile Island Nuclear Generating Station, site of the 1979 nuclear core meltdown. The nuclear power plant closed in 2019.
Geography
According to the U.S. Census Bureau, the county has a total area of 558 square miles (1,450 km2), of which 525 square miles (1,360 km2) is land and 33 square miles (85 km2) (5.9%) is water.[5] The county is bound to its western border by the Susquehanna River (with the exception of a small peninsula next to Duncannon). The area code is 717 with an overlay of 223.
Adjacent counties
- Northumberland County (north)
- Schuylkill County (northeast)
- Lebanon County (east)
- Lancaster County (south)
- York County (southwest)
- Cumberland County (west)
- Perry County (west)
- Juniata County (northwest)
Major roads and highways
Climate
Most of the county by area has a humid continental climate (Dfa except for some Dfb in highlands.) The inclusion of temperature numbers for the past decade shows some lower-lying areas, including Harrisburg, to have a humid subtropical climate (Cfa.) The hardiness zone is 7a except in some higher northern areas where it is 6b and a few very small areas along the river below the city including the airport where it is 7b.
| Climate data for Harrisburg, Pennsylvania (Harrisburg Int'l), 1991–2020 normals,[b] extremes 1888–present[c] | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 73 (23) |
79 (26) |
87 (31) |
93 (34) |
97 (36) |
100 (38) |
107 (42) |
104 (40) |
102 (39) |
97 (36) |
84 (29) |
75 (24) |
107 (42) |
| Mean maximum °F (°C) | 59.3 (15.2) |
61.4 (16.3) |
72.7 (22.6) |
83.5 (28.6) |
89.5 (31.9) |
93.3 (34.1) |
96.2 (35.7) |
93.8 (34.3) |
89.7 (32.1) |
81.1 (27.3) |
70.8 (21.6) |
62.3 (16.8) |
97.0 (36.1) |
| Mean daily maximum °F (°C) | 38.6 (3.7) |
42.0 (5.6) |
51.3 (10.7) |
63.8 (17.7) |
73.7 (23.2) |
82.4 (28.0) |
86.8 (30.4) |
84.7 (29.3) |
77.6 (25.3) |
65.7 (18.7) |
53.9 (12.2) |
43.3 (6.3) |
63.6 (17.6) |
| Daily mean °F (°C) | 30.8 (−0.7) |
33.4 (0.8) |
41.8 (5.4) |
53.2 (11.8) |
63.4 (17.4) |
72.5 (22.5) |
77.3 (25.2) |
75.2 (24.0) |
67.9 (19.9) |
55.8 (13.2) |
44.8 (7.1) |
35.8 (2.1) |
54.3 (12.4) |
| Mean daily minimum °F (°C) | 23.0 (−5.0) |
24.7 (−4.1) |
32.3 (0.2) |
42.5 (5.8) |
53.1 (11.7) |
62.7 (17.1) |
67.8 (19.9) |
65.8 (18.8) |
58.2 (14.6) |
46.0 (7.8) |
35.8 (2.1) |
28.2 (−2.1) |
45.0 (7.2) |
| Mean minimum °F (°C) | 7.4 (−13.7) |
10.1 (−12.2) |
17.9 (−7.8) |
29.2 (−1.6) |
39.6 (4.2) |
50.8 (10.4) |
58.3 (14.6) |
55.8 (13.2) |
45.2 (7.3) |
33.0 (0.6) |
22.9 (−5.1) |
14.6 (−9.7) |
5.0 (−15.0) |
| Record low °F (°C) | −22 (−30) |
−13 (−25) |
−1 (−18) |
11 (−12) |
30 (−1) |
40 (4) |
49 (9) |
45 (7) |
30 (−1) |
23 (−5) |
10 (−12) |
−8 (−22) |
−22 (−30) |
| Average precipitation inches (mm) | 3.03 (77) |
2.59 (66) |
3.70 (94) |
3.55 (90) |
3.83 (97) |
3.98 (101) |
4.74 (120) |
3.77 (96) |
4.83 (123) |
3.81 (97) |
2.97 (75) |
3.43 (87) |
44.23 (1,123) |
| Average snowfall inches (cm) | 9.1 (23) |
9.4 (24) |
5.6 (14) |
0.4 (1.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.2 (0.51) |
0.8 (2.0) |
4.4 (11) |
29.9 (76) |
| Average precipitation days (≥ 0.01 in) | 10.9 | 10.4 | 11.0 | 11.4 | 13.0 | 11.5 | 10.9 | 10.0 | 9.2 | 9.2 | 8.5 | 10.3 | 126.3 |
| Average snowy days (≥ 0.1 in) | 5.1 | 4.8 | 2.7 | 0.3 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.7 | 2.7 | 16.3 |
| Average ultraviolet index | 2 | 3 | 4 | 6 | 8 | 9 | 9 | 8 | 6 | 4 | 2 | 2 | 5 |
| Source 1: NOAA[7][8] | |||||||||||||
| Source 2: Weather Atlas (UV data)[9] | |||||||||||||
| Climate data for Harrisburg, Pennsylvania (Harrisburg Capital City Airport) 1991-2020 normals (Records 1939-2021) | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 73 (23) |
83 (28) |
86 (30) |
Zdroj:https://en.wikipedia.org?pojem=Dauphin_County,_Pennsylvania||||||||||