Geography of St. Lawrence River
Geography of St. Lawrence River: location, coordinates, elevation, terrain and the places around it.
Geography of St. Lawrence River
Quebec City is 0 mi to the north, Baxter State Park is 126 mi to the south-east, Montreal is 145 mi to the south-west and Montreal-Trudeau International Airport is 153 mi to the south-west.
Map of St. Lawrence River
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Coordinates: 46°48′50″N 71°12′28.8″W (46.8139, -71.208)
Quick facts about St. Lawrence River
| Type | River |
|---|---|
| State | Quebec |
| Country | Canada |
| Continent | North America |
| Coordinates | 46°48′50″N 71°12′28.8″W (46.8139, -71.208) |
| Length | 744 mi |
| Known for | the Great Lakes outlet to the Atlantic |
| Local time | 7:36 PM (UTC-04:00) |
| Best months | July and September |
| Climate | Subarctic |
Summary
St. Lawrence River is a river in Quebec. St. Lawrence River is a river known as the Great Lakes outlet to the Atlantic.
Right now it is 58°F (14°C) in St. Lawrence River with clear. It feels like 58°F. Today runs from 57°F to 74°F. Chance of precipitation is 55%. Sightseeing conditions score 8.4/10 - good conditions.
The best time to visit St. Lawrence River is July and September. The climate is subarctic. January, March and December tend to be the least comfortable months. July is the warmest month with average highs near 78°F, while February is the coldest with lows near 4°F.
The closest major airport is Montreal-Trudeau International Airport (YUL), about 153 mi away. Nearby highlights include Baxter State Park, Mont-Tremblant National Park, Mount Washington and Franconia Notch State Park.
In plain terms. Today is about average for August. The forecast high of 74°F is in line with the 75°F typical for this month. The best window to be outside is roughly 2 PM to 5 PM, when temperature, rain chance and wind line up best. fishing is the strongest bet in St. Lawrence River today at 8.8/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Climate in St. Lawrence River month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 21° | 5° | 2,7 in | ★★☆☆☆ |
| February | 24° | 4° | 2,0 in | ★★☆☆☆ |
| March | 34° | 17° | 4,1 in | ★★☆☆☆ |
| April | 49° | 30° | 4,9 in | ★★☆☆☆ |
| May | 62° | 44° | 5,0 in | ★★★☆☆ |
| June | 73° | 54° | 6,9 in | ★★★☆☆ |
| July | 78° | 61° | 5,1 in | ★★★★☆ |
| August | 75° | 57° | 5,3 in | ★★★★☆ |
| September | 69° | 51° | 2,8 in | ★★★★☆ |
| October | 57° | 42° | 3,5 in | ★★★☆☆ |
| November | 38° | 27° | 3,5 in | ★★☆☆☆ |
| December | 26° | 11° | 3,8 in | ★☆☆☆☆ |
Climate type: Subarctic. Source: Open-Meteo archive (ERA5).
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Frequently asked questions
Where is St. Lawrence River?
St. Lawrence River is a river in Quebec. Its coordinates are 46.8139, -71.208. It lies in North America.
What is the weather like in St. Lawrence River right now?
It is currently 58°F (14°C) with clear. Humidity is 91% and wind is 2 mph.
When is the best time to visit St. Lawrence River?
July and September offer the most comfortable conditions in St. Lawrence River, which has a subarctic climate. January, March and December are usually the hardest months for outdoor plans.
What time zone is St. Lawrence River in?
St. Lawrence River observes America/Toronto (UTC-04:00). The local time is 7:36 PM.
What is the nearest airport to St. Lawrence River?
The closest airports are Montreal-Trudeau International Airport (YUL), 153 mi away and Boston Logan International Airport (BOS), 308 mi away.
What are the top things to do in St. Lawrence River?
Popular options include Baxter State Park, Mont-Tremblant National Park, Mount Washington, Franconia Notch State Park and Acadia National Park.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (rivers) - coordinates, hierarchy and facts. |
|---|---|
| Map tiles | OpenStreetMap contributors, CARTO and Esri. |
| Elevation | Open-Meteo digital elevation model where the dataset has no value. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 25, 2026 at 7:36 PM local time. Live blocks refresh every 15 minutes; climate averages monthly.
