Winnipeg lies at the bottom of the Red River Valley, a low-lying flood plain with an extremely flat topography. This valley was formed by the ancient glacial Lake Agassiz which has rich deposits of black soil. Winnipeg is on the eastern edge of the Canadian Prairies in Western Canada; it is known as the 'Gateway to the West'. It is relatively close to many large Canadian Shield lakes and parks, as well as Lake Winnipeg (the Earth's twelfth largest freshwater lake). Winnipeg is bordered by tallgrass prairie to the west and south and the aspen parkland to the northeast.

Winnipeg is fairly isolated in that the closest city with equal or greater population is Minneapolis–Saint Paul, Minnesota (metro population of 3,317,308), which is southeast from the city. According to the Census geographic units of Canada, the city has a total area of and an elevation of .

The city has a humid continental climate with wide temperature contrasts between winter and summer, and greater precipitation in summer. Mean January temperature is , and mean July temperature is . Average annual precipitation is ; snow falls on 53 days and lies on 132 days in an average year.

Winnipeg has three major rivers: the Red River, the Assiniboine River, and the Seine River. The Red River is a Canadian heritage river. Because of Winnipeg's extremely flat topography and substantial snowfall, Winnipeg is subject to severe flooding. The Red River reached its greatest flood height in 1826. The Red River Floodway protects the city from flooding.

Cityscape

According to the 2001 Census, there are 230 neighbourhoods in Winnipeg. Downtown Winnipeg, the city's economic core, is centred on the intersection of Portage Avenue and Main Street (reputed to be one of the windiest in Canada). Downtown Winnipeg covers an area of about one square mile (2.5 km2) and is the fastest growing high-income neighbourhood in the city. More than 72,000 people work downtown, and over 40,000 students attend classes at its universities and colleges. The past few decades have seen downtown undergo major revitalization efforts; since 1999, over Can$1.2 billion has been invested.

In Winnipeg, there are 10 buildings that stand taller than . The tallest building in the city is the newer 33-storey, 201 Portage. The second tallest building in the city is the Richardson Building, standing at tall with 34 storeys.

Downtown Winnipeg's Exchange District is named after the area's original grain exchange from 1880 to 1913. The 30-block district received National Historic Site of Canada status in 1997; it includes North America's most extensive collection of early 20th-century terracotta and cut stone architecture, 62 of downtown Winnipeg's 86 heritage structures, Stephen Juba Park, and Old Market Square, home to Winnipeg Jazz and Fringe Festivals. Other major downtown areas include The Forks, Central Park, Broadway-Assiniboine and Chinatown. Many of Downtown Winnipeg's major buildings are linked with the Winnipeg Walkway skywalk.

Various residential neighbourhoods surround downtown in all directions, but expansion is greatest to the south and west, and has tended to follow the course of the two major rivers. The urbanized area in Winnipeg is about from east to west and from north to south, although several areas remain underdeveloped. The largest park in the city, Assiniboine Park next to the affluent neighbourhood of Tuxedo, houses the Assiniboine Park Zoo and the Leo Mol Sculpture Garden, Other large city parks include Kildonan Park, St. Vital Park, and Fort Whyte Centre. The major commercial areas in the city are Polo Park (West End and St. James), Kildonan Crossing (Transcona and East Kildonan), South St. Vital, and Garden City (West Kildonan).

Osborne Village is Winnipeg's most densely populated neighbourhood, as well as the second most densely populated neighbourhood in Western Canada.City of Winnipeg Osborne Village neighbourhood Plan http://winnipeg.ca/clkdmis/documents/c/2006/a6621/pd%2009%2019%20no.%2015%20att.pdf It was voted the Best Place to Live in Uptown Magazine's 2008 Best of List. Osborne Village is a complex urban community with a diverse heritage. Popular annual events include the Canada Day Festival. Osborne Village is home to over 175 businesses local businesses.

Saint Boniface is the centre of much of the Franco-Manitoban community. It features such landmarks as the Cathédrale de Saint Boniface (St. Boniface Cathedral), Boulevard Provencher, the Provencher Bridge, Esplanade Riel, St. Boniface Hospital, the Collège universitaire de Saint-Boniface and the Royal Canadian Mint. It covers the southeast part of the city and has a population of 65,000.

Roadways and addresses

The city uses the grid plan but there are several different grids in place, as the city was originally thirteen separate municipalities and each developed under different circumstances and under different rules. Although it is common for roadways running north–south to be called "streets" and those running east–west to be called "avenues", the practice is far from universal, and few roadways run in a precise cardinal direction; an "east-west" road may run at a 45-degree angle from true east–west. Attempts in the early 20th century to bring order to the system by giving numerical names to the streets failed; all roadways in the city have proper names, some of which are repeated. (There is, for instance, a Wellington Crescent in River Heights and a Wellington Avenue in the West End, and a Killarney Avenue in Fort Garry and a Killarney Street in St. Vital.)

There is also no universal address numbering system in place. Address numbers usually increase as the distance from either the Red or Assiniboine rivers increases, but this is by no means uniform, even within a specific district. These peculiarities can cause serious problems for newcomers and visitors, especially in the older areas of the city, and may even affect postal and other deliveries.

Many of the main thoroughfares in Winnipeg are wide due to the spring soil conditions and the historical use of the Red River ox cart which created wide ruts in the (then) muddy roads. Portage Avenue has four lanes of traffic in each direction plus a central boulevard for much of its run through Winnipeg. Few thoroughfares, however, are as wide as the freeways seen in other Canadian cities (such as the 401 in Toronto or Deerfoot Trail in Calgary). Residential streets are commonly significantly narrower than streets in other Western Canadian cities, so narrow that parking is only possible on one side of the street.

Climate Winnipeg lies in the middle of the North American continent on a low-lying, flat plain. Due to its location in the Canadian Prairies, and its distance from both mountains and oceans, it has an extreme humid continental climate (Köppen Dfb, Plant Hardiness Zone 3b-4a), in that there are great differences between summer and winter temperatures. The openness of the prairies leaves Winnipeg exposed to numerous weather systems including blizzards and cold Arctic high pressure systems, known as the polar high. Winnipeg has four distinct seasons, with short transitional periods between winter and summer.

The city averages of precipitation per year, although this can vary greatly from year to year.

Climate data is also available for downtown Winnipeg, with a weather station located at The Forks. This data demonstrates the urban heat island effect cities have on moderating temperatures compared to airport weather stations.

The Forks maximum records: Record high temperature of recorded on 19 June 2022 Record high daily minimum of recorded on 24 July 2007 Record high dew point of recorded on 4 August 2001 Most humid month with an average monthly dew point of recorded during July 2024 Warmest month with an average monthly mean temperature of recorded during July 2012 Warmest monthly average daily minimum of recorded during July 2012 Warmest monthly average daily maximum of recorded during July 2006 July 2020 saw no daily maximum temperature below July 2012 saw no temperature below July 2024 saw no dew point below

For The Forks station, summer 2009 saw the lowest yearly maximum for daily minimum temperatures of as well as the lowest yearly maximum dew point of ; and summer 2004 for the lowest yearly maximum temperature of .

The average yearly maximum daily minimum temperature is for YWG Airport and in The Forks. The average yearly maximum dew point is at YWG airport and in The Forks.

Winter

Typical winter phenomena include the bonspiel (January) thaw, ice fog, and the aurora borealis. The city is virtually assured of having a white Christmas as there is only one 25 December on record in the last century where there was no snow on the ground. Out of Canada's 100 largest cities, Winnipeg's winter is the tenth coldest with an average low of . From December through February the maximum daily temperature exceeds , on average, for only 10 days and the minimum daily temperature falls below on 49 days. Significant thaws, where the temperature approaches or exceeds , are practically unheard of in winter.

Summer

Summers are typically warm and generally not overly humid, with average humidity levels around 50% from June to August. Occasionally, humidex readings exceed 40. The trees will usually be in full bloom by late May and do not lose their leaves until early October. Winnipeg's growing season lasts from 25 May to 22 September; and temperatures frequently hover in the mid to high twenties Celsius (77F to 86F). The city frequently gets thunderstorms during the summer, averaging 27 per season. The city can occasionally have short blasts of hot weather like on 23 August 2011 the temperature reached . The temperature reaches at or above 14 times a year, which is ranked the 16th highest in Canada, just above Toronto, Ontario. The highest temperature ever recorded in Winnipeg (since commencement of record-keeping in 1873) was on 11 July 1936; and the hottest temperature recorded in the past 50 years was on 6 August 1988 and again on 1 August 1989. The highest humidex reading was 48 on 25 July 2007. The record high daily minimum was recorded on 12 July 1936. The record highest dew point was recorded 17 July 2022. The most humid month on record was July 2024 with an average dew point of . The warmest month on record was July 2021 with a monthly average mean temperature of . August 1983 set the record for the month with the warmest daily maximums with a average, and July 1983 for the month with the warmest daily minimums with a average. July 1964 recorded no daily maximum temperature below for the entire month, and July 1989 for no temperature below for the entire month. July 1989 also saw no dew point below for the entire month. Summer 1994 saw the lowest yearly maximum for daily minimum temperature at . Summer 2009 recorded the lowest yearly maximum temperature at . Summer 1961 saw the lowest yearly maximum dew point of .

Spring and autumn

The weather during these seasons is highly variable, and rapidly changing. For example, temperatures in Winnipeg in April have ranged from , and in October from . The city often receives an Indian summer, when summer weather returns briefly after the first frosts, usually in late September or sometimes October. Some Septembers can have gorgeous weather, like in September 2009 Winnipeg only saw 4 days with daytime highs below 20 °C (68 °F) at the Forks weather station.

Sunshine