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This is the outline of the geography of the city of Ottawa, the capital of Canada. Ottawa's current borders were formed in 2001, when the former city of Ottawa amalgamated with the ten other municipalities within the former Regional Municipality of Ottawa–Carleton. Ottawa is now a single-tiered census division, home to 1,017,449 people.[1]
The city centre is located at the confluence of the Ottawa and Rideau Rivers. The Ottawa River forms the entire northern boundary of the city which it shares with the province of Quebec's municipalities of Pontiac and Gatineau. The northern boundary begins in the west at Arnprior and continues east to Rockland. The boundary then turns south in a straight line, separating the former Township of Cumberland (now in Ottawa) and the City of Clarence-Rockland. It then turns west in another straight line separating the former Township of Cumberland with the municipalities of The Nation and Russell. It then turns south separating Russell from the former Township of Osgoode (now in Ottawa). That boundary runs south in a straight line, then turns west separating Osgoode from the municipality of North Dundas. That boundary runs west in a straight line before turning north separating Osgoode from the municipality of North Grenville. This is another straight line, running north until the Rideau River near Kemptville. The boundary follows the river upstream until almost reaching Merrickville. The boundary then runs in a northwest direction in a straight line with a number of jogs. It separates the municipalities of Montague, Beckwith and Mississippi Mills from the former townships of Marlborough, Goulbourn, Huntley and Fitzroy.
Topography
The highest point in Ottawa is 166 m (545 ft) above sea level, and is located 2.6 km (1.6 mi) SSE of Manion Corners (45°14′05″N 76°03′03″W / 45.23472°N 76.05083°W).[2] The lowest point in the city is the Ottawa River, at 44 m (144 ft) above sea level.
Highest points by ward
| Ward | Highest point | Elevation (approx.) |
|---|---|---|
| West Carleton-March Ward | 2.6 km (1.6 mi) SSE of Manion Corners | 166 m (545 ft) |
| Rideau-Goulbourn Ward | 8 km (5.0 mi) N of Munster on Jinkinson Road | 153 m (502 ft) |
| Kanata South Ward | Glen Cairn Reservoir | 131 m (430 ft) |
| College Ward | Khymer Court | 129 m (423 ft) |
| Stittsville Ward | Rockson Crescent | 128 m (420 ft) |
| Kanata North Ward | Huntsville Drive | 126 m (413 ft) |
| Osgoode Ward | 1 km (0.62 mi) SE of Bank Street at Rideau Road | 120 m (390 ft) |
| Cumberland Ward | Cumberland Ridge Drive | 120 m (390 ft) |
| Barrhaven Ward | Cedarview Road | 120 m (390 ft) |
| Gloucester-Southgate Ward | Tom Roberts Avenue | 119 m (390 ft) |
| Knoxdale-Merivale Ward | Cedarview Road at Cedarhill Drive | 115 m (377 ft) |
| River Ward | Carlington Hill | 115 m (377 ft) |
| Bay Ward | Wesley Clover Parks | 114 m (374 ft) |
| Gloucester-South Nepean Ward | Osgoode Link Pathway at High Road | 114 m (374 ft) |
| Innes Ward | 200 m (660 ft) WSW of Forest Ridge Pumping Station | 114 m (374 ft) |
| Beacon Hill-Cyrville Ward | Quarry Park | 113 m (371 ft) |
| Rideau-Rockcliffe Ward | Foxview Place | 106 m (348 ft) |
| Alta Vista Ward | Alta Vista Drive at Randall Avenue | 102 m (335 ft) |
| Capital Ward | Bank Street at Alta Vista Drive | 96 m (315 ft) |
| Orléans Ward | Clearcrest Crescent | 93 m (305 ft) |
| Kitchissippi Ward | Maitland Avenue Bridge | 89 m (292 ft) |
| Somerset Ward | Parliament Hill | 86 m (282 ft) |
| Rideau-Vanier Ward | Richelieu Park | 75 m (246 ft) |
Geology
Many features of geologic interest are found in Ottawa.[3]
| Site | Feature |
|---|---|
| W. Erskine Johnston Public School | Glacially sculpted Precambrian gneiss outcrops |
| Kanata Centrum Shopping Centre | Sandstone and dolomite outcrops |
| Stony Swamp Conservation Area | Cambrian-Ordovician sandstone strata |
| Champlain Bridge | Stromatolite fossils |
| Westboro Beach | Stromatolite, orthocone and trace fossils |
| Transitway at Roosevelt Avenue | Stromatolite fossils |
| Tunney's Pasture | Cross-section of the Gloucester Fault |
| Geological Survey of Canada | Fossiliferous limestone outcrop |
| Hog's Back Falls | Ordovician sedimentary rocks and the Gloucester Fault |
| Mer Bleue Bog | Boreal peatland |
| Victoria Island | Dune bedforms and fossiliferous limestone |
| Lady Grey Drive | Ordovician limestone deposits |
| Pinhey's Point | Glacial erratics |
| Petrie Island | Sedimentary shoreline with imported Ordovician blocks |
| Carp Hills | Outcrops of the Canadian Shield |
| Pinhey Sand Dunes | Dunes from an ancient shoreline of the Champlain Sea |
| Cardinal Creek Karst | Paleozoic karst |
| Burnt Lands Alvar | Limestone alvar |
| Colonel By Valley | Shallow valley that descends into the Ottawa River |
| Nanny Goat Hill | Steep limestone escarpment |
Climate
Classification
| Climatic scheme | Initials | Description |
|---|---|---|
| Köppen system[4][5] | Dfb | Warm-summer humid continental climate |
| Trewartha system[6] | Dcb | Continental climate |
Recent data
| Climate data for Ottawa (Central Experimental Farm), elevation: 79.2 m (260 ft), 1981–2010 normals, extremes 1872–present[a] | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
| Record high °C (°F) | 15.6 (60.1) |
12.7 (54.9) |
26.7 (80.1) |
31.2 (88.2) |
35.2 (95.4) |
36.7 (98.1) |
37.8 (100.0) |
37.8 (100.0) |
36.7 (98.1) |
29.4 (84.9) |
23.3 (73.9) |
17.2 (63.0) |
37.8 (100.0) |
| Mean daily maximum °C (°F) | −5.8 (21.6) |
−3.1 (26.4) |
2.4 (36.3) |
11.4 (52.5) |
19.0 (66.2) |
24.1 (75.4) |
26.6 (79.9) |
25.4 (77.7) |
20.5 (68.9) |
12.8 (55.0) |
5.5 (41.9) |
−2.0 (28.4) |
11.4 (52.5) |
| Daily mean °C (°F) | −10.2 (13.6) |
−7.9 (17.8) |
−2.2 (28.0) |
6.5 (43.7) |
13.5 (56.3) |
18.7 (65.7) |
21.2 (70.2) |
19.9 (67.8) |
15.3 (59.5) |
8.4 (47.1) |
2.0 (35.6) |
−5.6 (21.9) |
6.6 (43.9) |
| Mean daily minimum °C (°F) | −14.4 (6.1) |
−12.5 (9.5) |
−6.8 (19.8) |
1.5 (34.7) |
8.0 (46.4) |
13.3 (55.9) |
15.7 (60.3) |
14.5 (58.1) |
10.1 (50.2) |
4.0 (39.2) |
−1.5 (29.3) |
−9.2 (15.4) |
1.9 (35.4) |
| Record low °C (°F) | −37.8 (−36.0) |
−38.3 (−36.9) |
−36.7 (−34.1) |
−20.6 (−5.1) |
−7.2 (19.0) |
0.0 (32.0) |
3.3 (37.9) |
1.1 (34.0) |
−4.4 (24.1) |
−12.8 (9.0) |
−30.6 (−23.1) |
−38.9 (−38.0) |
−38.9 (−38.0) |
| Average precipitation mm (inches) | 62.9 (2.48) |
49.7 (1.96) |
57.5 (2.26) |
71.1 (2.80) |
86.6 (3.41) |
92.7 (3.65) |
84.4 (3.32) |
83.8 (3.30) |
92.7 (3.65) |
85.9 (3.38) |
82.7 (3.26) |
69.5 (2.74) |
919.5 (36.20) |
| Average rainfall mm (inches) | 23.0 (0.91) |
17.9 (0.70) |
28.8 (1.13) |
63.2 (2.49) |
86.6 (3.41) |
92.7 (3.65) |
84.4 (3.32) |
83.8 (3.30) |
92.7 (3.65) |
83.1 (3.27) |
67.5 (2.66) |
31.9 (1.26) |
755.5 (29.74) |
| Average snowfall cm (inches) | 44.3 (17.4) |
34.7 (13.7) |
29.1 (11.5) |
7.2 (2.8) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
0.0 (0.0) |
2.9 (1.1) |
16.0 (6.3) |
41.3 (16.3) |
175.4 (69.1) |
| Average precipitation days (≥ 0.2 mm) | 16.0 | 11.7 | 11.5 | 13.2 | 14.5 | 12.4 | 11.6 | 11.2 | 12.9 | 14.9 | 15.2 | 15.6 | 160.7 |
| Average rainy days (≥ 0.2 mm) | 3.7 | 3.5 | 5.5 | 11.5 | 14.4 | 12.4 | 11.6 | 11.2 | 12.9 | 14.6 | 11.6 | 5.5 | 118.3 |
| Average snowy days (≥ 0.2 cm) | 14.1 | 9.7 | 7.4 | 2.7 | 0.08 | 0.0 | 0.0 | 0.0 | 0.0 | 0.81 | 5.1 | 12.2 | 52.0 |
| Mean monthly sunshine hours | 99.3 | 131.3 | 167.1 | 189.8 | 229.8 | 254.2 | 279.0 | 249.3 | 177.6 | 139.4 | 84.3 | 82.6 | 2,083.7 |
| Percent possible sunshine | 35.0 | 44.9 | 45.3 | 46.9 | 49.9 | 54.3 | 58.9 | 57.1
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