Geography and Climate
Johnson City is located at 36°20′N 82°22′W / 36.333°N 82.367°W / 36.333; -82.367 (36.3354, -82.3728). Johnson City shares a contiguous southeastern border with Elizabethton. Johnson City also shares contiguous borders with Kingsport to the far north along I-26 and Bluff City to the east along US 11E.
According to the United States Census Bureau, the city has a total area of 39.6 square miles (102.5 km²), of which 39.3 square miles (101.7 km²) is land and 0.3 square mile (0.8 km²; 0.78%) is water.
The steep mountains, rolling hills and valleys surrounding the region are part of the Appalachian Ridge-and-Valley Province, and Johnson City is just west of the Blue Ridge Mountains. Roan Mountain, with an elevation of over 6,000 feet (1,800 m), is approximately 20 miles (32 km) to the east of the city. Buffalo Mountain, a ridge over 2,700 feet (820 m) high, is the location of a city park on the south side of town. Boone Lake, a TVA reservoir on the Holston and Watauga Rivers, is also partly within the city limits.
The Nolichucky River flows close to Johnson City towards its southern side. Whitewater rafting and kayaking opportunities exist where that river flows from the North Carolina state line near Erwin.
| Climate data for Johnson City, Tennessee | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °F (°C) | 78 (26) |
80 (27) |
83 (28) |
89 (32) |
91 (33) |
96 (36) |
99 (37) |
99 (37) |
97 (36) |
90 (32) |
84 (29) |
76 (24) |
99 (37) |
| Average high °F (°C) | 45 (7) |
50 (10) |
59 (15) |
68 (20) |
76 (24) |
83 (28) |
86 (30) |
85 (29) |
79 (26) |
69 (21) |
59 (15) |
48 (9) |
67.3 (19.6) |
| Average low °F (°C) | 25 (−4) |
28 (−2) |
34 (1) |
42 (6) |
51 (11) |
60 (16) |
64 (18) |
63 (17) |
55 (13) |
44 (7) |
35 (2) |
28 (−2) |
44.1 (6.7) |
| Record low °F (°C) | −21 (−29) |
−12 (−24) |
−1 (−18) |
20 (−7) |
28 (−2) |
39 (4) |
46 (8) |
43 (6) |
34 (1) |
22 (−6) |
13 (−11) |
−9 (−23) |
−21 (−29) |
| Precipitation inches (mm) | 3.42 (86.9) |
3.69 (93.7) |
3.59 (91.2) |
3.50 (88.9) |
4.44 (112.8) |
4.56 (115.8) |
5.44 (138.2) |
4.15 (105.4) |
3.03 (77) |
2.44 (62) |
3.34 (84.8) |
3.62 (91.9) |
45.22 (1,148.6) |
| Snowfall inches (cm) | 5.2 (13.2) |
4.2 (10.7) |
2.3 (5.8) |
0.4 (1) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
0 (0) |
0.9 (2.3) |
2.6 (6.6) |
15.6 (39.6) |
| % humidity | 59.0 | 71.5 | 69.0 | 67.0 | 69.5 | 73.0 | 75.0 | 76.5 | 76.5 | 74.0 | 68.5 | 69.5 | 74.0 |
| Source #1: | |||||||||||||
| Source #2: | |||||||||||||
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