Editing Lethbridge (section)

=== Climate ===
Lethbridge has a [[semi-arid climate]] ([[Köppen climate classification]] ''[[Semi-arid climate#Cold semi-arid climates|BSk]]'') with an average maximum temperature of {{convert|12.8|C}} and an average minimum temperature of {{convert|-1.1|C}}. With [[precipitation]] averaging {{cvt|380.2|mm}}, and 264 dry days on average, Lethbridge is the eleventh driest city in Canada.<ref name="winners" /><ref name="CCN2">{{cite web
 |url=http://climate.weatheroffice.gc.ca/climate_normals/results_e.html?stnID=2265&lang=e&dCode=0&province=ALTA&provBut=Search&month1=0&month2=12
 |title=Lethbridge CDA, Alberta
 |work=Canadian Climate Normals 1971–2000
 |publisher=[[Environment and Climate Change Canada]]
 |date=February 4, 2013
|access-date=April 18, 2013 |archive-url=https://web.archive.org/web/20121120174644/http://www.climate.weatheroffice.gc.ca/climate_normals/results_e.html?stnID=2265&lang=e&dCode=0&province=ALTA&provBut=Search&month1=0&month2=12
 |archive-date=November 20, 2012
}}</ref> Mean relative humidity in the morning hovers between 69 and 78% throughout the year, but afternoon mean relative humidity is more uneven, ranging from 38% in August to 58% in January.<ref name= CCN1 /> On average, Lethbridge has 116 days with wind speed of {{cvt|40|km/h}} or higher, ranking it as the second city in Canada for such weather.<ref name="winners">[http://www.climate.weatheroffice.gc.ca/winners/citydata_e.html?SelectedCity=63 Weather Winners], Environment and Climate Change Canada. Retrieved January 7, 2011. {{webarchive |url=https://web.archive.org/web/20120305104817/http://www.climate.weatheroffice.gc.ca/winners/citydata_e.html?SelectedCity=63 |date=March 5, 2012}}</ref>

Its high [[elevation]] of {{cvt|929|m}} and close proximity to the [[Rocky Mountains]] provides Lethbridge with cooler summers than other locations in the [[Canadian Prairies]].<ref name="bus-inv-profile">[http://www.chooselethbridge.ca/docs/files/Environics%20-%20EDL%20Trade%20Catchment%20Study.pdf Lethbridge Trade Area and Commercial Catchment Study] {{webarchive|url=https://web.archive.org/web/20161129082627/http://www.chooselethbridge.ca/docs/files/Environics%20-%20EDL%20Trade%20Catchment%20Study.pdf |date=November 29, 2016}}, Economic Development Lethbridge. 2016. Retrieved November 28, 2016.</ref> These factors protect the city from strong northwest and southwest winds and contribute to frequent [[Chinook wind]]s during the winter. Lethbridge winters have the highest temperatures in the prairies, reducing the severity and duration of winter cold periods and resulting in fewer days with [[snow]] cover.<ref name="chamber">[https://web.archive.org/web/20070110033256/http://www.lethbridgechamber.com/community.php Community Profile], Lethbridge Chamber of Commerce. Retrieved December 24, 2006.</ref> The average daytime temperature peaks by the end of July/beginning of August, when it reaches {{convert|26.4|C}}.<ref>{{cite web|title=Climate Data Almanac for August 02 |url=http://climate.weatheroffice.gc.ca/climateData/almanac_e.html?timeframe=4&Prov=ALTA&StationID=2263&Year=2001&Month=8&Day=2 |archive-url=https://archive.today/20130628035057/http://climate.weatheroffice.gc.ca/climateData/almanac_e.html?timeframe=4&Prov=ALTA&StationID=2263&Year=2001&Month=8&Day=2 |archive-date=June 28, 2013 |work=Environment and Climate Change Canada |access-date=June 25, 2013}}</ref> The city's temperature reaches a maximum high of {{convert|35.0|C}} or greater on average once or twice a year.<ref name= CCN1 />

The highest temperature ever recorded in Lethbridge was {{convert|40.5|C}} on August 10, 2018.<ref>{{cite web
|title=Daily Data Report for August, 2018
|url=http://climate.weather.gc.ca/climate_data/daily_data_e.html?hlyRange=2011-01-11%7C2018-09-06&dlyRange=2011-01-13%7C2018-09-06&mlyRange=%7C&StationID=49268&Prov=AB&urlExtension=_e.html&searchType=stnProx&optLimit=specDate&Month=8&Day=10&StartYear=1840&EndYear=2018&Year=2018&selRowPerPage=25&Line=3&txtRadius=25&optProxType=navLink&txtLatDecDeg=49.695&txtLongDecDeg=112.7675&timeframe=2
|work=Environment and Climate Change Canada
|date=October 31, 2011
|access-date=August 12, 2018
|archive-date=September 7, 2018
|archive-url=https://web.archive.org/web/20180907221227/http://climate.weather.gc.ca/climate_data/daily_data_e.html?hlyRange=2011-01-11%7C2018-09-06&dlyRange=2011-01-13%7C2018-09-06&mlyRange=%7C&StationID=49268&Prov=AB&urlExtension=_e.html&searchType=stnProx&optLimit=specDate&Month=8&Day=10&StartYear=1840&EndYear=2018&Year=2018&selRowPerPage=25&Line=3&txtRadius=25&optProxType=navLink&txtLatDecDeg=49.695&txtLongDecDeg=112.7675&timeframe=2
|url-status=live
}}</ref> The lowest temperature ever recorded was {{convert|-42.8|C}} on January 7, 1909; December 18, 1924;<ref name="Lethbridge CDA" /> January 3, 1950; and December 29, 1968.<ref name= CCN1 />

[[File:Lethbridge skyline August 2009.jpg|thumb|650px|center|Lethbridge seen from Halmrast Manor]]
{{Weather box
|location = [[Lethbridge Airport]], 1991–2020 normals, extremes 1886–present
| width=auto
|metric first = Y
|single line = Y
|collapsed =

|Jan maximum humidex = 20.0
|Feb maximum humidex = 21.8
|Mar maximum humidex = 26.3
|Apr maximum humidex = 30.2
|May maximum humidex = 35.4
|Jun maximum humidex = 37.7
|Jul maximum humidex = 41.7
|Aug maximum humidex = 40.1
|Sep maximum humidex = 36.1
|Oct maximum humidex = 30.1
|Nov maximum humidex = 23.0
|Dec maximum humidex = 17.8
|year maximum humidex =

|Jan record high C = 20.0
|Feb record high C = 21.8
|Mar record high C = 26.8
|Apr record high C = 33.9
|May record high C = 34.2
|Jun record high C = 38.3
|Jul record high C = 40.0
|Aug record high C = 40.5
|Sep record high C = 36.7
|Oct record high C = 31.7
|Nov record high C = 23.3
|Dec record high C = 19.4
|year record high C = 40.5

|Jan high C = 0.1
|Feb high C = 1.7
|Mar high C = 6.4
|Apr high C = 12.6
|May high C = 18.2
|Jun high C = 21.8
|Jul high C = 26.3
|Aug high C = 26.3
|Sep high C = 21.0
|Oct high C = 13.3
|Nov high C = 5.5
|Dec high C = 0.7
|year high C =

|Jan mean C = -6.0
|Feb mean C = -4.6
|Mar mean C = -0.2
|Apr mean C = 5.7
|May mean C = 11.1
|Jun mean C = 15.1
|Jul mean C = 18.4
|Aug mean C = 17.9
|Sep mean C = 13.2
|Oct mean C = 6.4
|Nov mean C = -0.5
|Dec mean C = -5.3
|year mean C =

|Jan low C = -12.1
|Feb low C = -11.0
|Mar low C = -6.8
|Apr low C = -1.3
|May low C = 3.9
|Jun low C = 8.3
|Jul low C = 10.5
|Aug low C = 9.4
|Sep low C = 5.3
|Oct low C = -0.6
|Nov low C = -6.6
|Dec low C = -11.2
|year low C =

|Jan record low C = −42.8
|Feb record low C = −42.2
|Mar record low C = −38.0
|Apr record low C = −27.2
|May record low C = −12.8
|Jun record low C = −3.3
|Jul record low C = 0.0
|Aug record low C = −1.7
|Sep record low C = −15.6
|Oct record low C = −26.7
|Nov record low C = −35.6
|Dec record low C = −42.8
|year record low C = −42.8

|Jan chill = −54.5
|Feb chill = −51.3
|Mar chill = −49.7
|Apr chill = −32.6
|May chill = −16.3
|Jun chill = −6.9
|Jul chill = 0.0
|Aug chill = −2.6
|Sep chill = −13.9
|Oct chill = −36.0
|Nov chill = −47.1
|Dec chill = −55.7
|year chill =

|precipitation colour = green
|Jan precipitation mm = 11.0
|Feb precipitation mm = 10.3
|Mar precipitation mm = 16.6
|Apr precipitation mm = 28.4
|May precipitation mm = 57.2
|Jun precipitation mm = 92.9
|Jul precipitation mm = 39.9
|Aug precipitation mm = 32.5
|Sep precipitation mm = 32.1
|Oct precipitation mm = 24.2
|Nov precipitation mm = 15.9
|Dec precipitation mm = 11.5
|year precipitation mm =

|unit precipitation days = 0.2 mm
|Jan precipitation days = 8.4
|Feb precipitation days = 6.8
|Mar precipitation days = 9.2
|Apr precipitation days = 10.4
|May precipitation days = 12.8
|Jun precipitation days = 13.5
|Jul precipitation days = 10.5
|Aug precipitation days = 8.5
|Sep precipitation days = 9.4
|Oct precipitation days = 7.6
|Nov precipitation days = 8.5
|Dec precipitation days = 7.9
|year precipitation days =

|rain colour = green
|Jan rain mm = 0.2
|Feb rain mm = 0.4
|Mar rain mm = 2.0
|Apr rain mm = 19.2
|May rain mm = 45.4
|Jun rain mm = 96.6
|Jul rain mm = 37.7
|Aug rain mm = 32.7
|Sep rain mm = 34.7
|Oct rain mm = 12.6
|Nov rain mm = 2.3
|Dec rain mm = 0.5
|year rain mm =

|Jan rain days = 0.29
|Feb rain days = 0.17
|Mar rain days = 1.3
|Apr rain days = 6.9
|May rain days = 11.0
|Jun rain days = 12.9
|Jul rain days = 9.2
|Aug rain days = 7.7
|Sep rain days = 9.1
|Oct rain days = 5.3
|Nov rain days = 2.1
|Dec rain days = 0.59
|year rain days =

|snow colour = green
|Jan snow cm = 13.3
|Feb snow cm = 15.1
|Mar snow cm = 18.0
|Apr snow cm = 13.1
|May snow cm = 5.1
|Jun snow cm = 0.0
|Jul snow cm = 0.0
|Aug snow cm = 1.3
|Sep snow cm = 1.3
|Oct snow cm = 9.5
|Nov snow cm = 16.4
|Dec snow cm = 14.8
|year snow cm =

|unit snow days = 0.2 cm
|Jan snow days = 8.0
|Feb snow days = 7.2
|Mar snow days = 7.6
|Apr snow days = 4.1
|May snow days = 1.4
|Jun snow days = 0.0
|Jul snow days = 0.0
|Aug snow days = 0.18
|Sep snow days = 0.38
|Oct snow days = 2.7
|Nov snow days = 6.6
|Dec snow days = 6.7
|year snow days =

|time day = 15:00 LST
|Jan humidity = 59.9
|Feb humidity = 53.9
|Mar humidity = 49.7
|Apr humidity = 40.4
|May humidity = 40.5
|Jun humidity = 44.5
|Jul humidity = 39.2
|Aug humidity = 36.6
|Sep humidity = 39.9
|Oct humidity = 44.4
|Nov humidity = 56.9
|Dec humidity = 57.3
|year humidity =

|Jan sun = 110.2
|Feb sun = 147.0
|Mar sun = 186.1
|Apr sun = 233.4
|May sun = 277.0
|Jun sun = 290.3
|Jul sun = 322.1
|Aug sun = 297.5
|Sep sun = 228.5
|Oct sun = 189.7
|Nov sun = 119.1
|Dec sun = 106.5
|year sun = 2507.3
|Jan percentsun = 41.1
|Feb percentsun = 51.5
|Mar percentsun = 50.6
|Apr percentsun = 56.7
|May percentsun = 58.2
|Jun percentsun = 59.7
|Jul percentsun = 65.6
|Aug percentsun = 66.5
|Sep percentsun = 60.2
|Oct percentsun = 56.6
|Nov percentsun = 43.5
|Dec percentsun = 41.8
|year percentsun = 54.3

|source 1 = [[Environment and Climate Change Canada]]<ref name="CCN1">
{{cite web
|url = https://climate.weather.gc.ca/climate_normals/results_1991_2020_e.html?searchType=stnProv&lstProvince=AB&txtCentralLatMin=0&txtCentralLatSec=0&txtCentralLongMin=0&txtCentralLongSec=0&stnID=294000000&dispBack=0
|publisher = Environment and Climate Change Canada
|title = Canadian Climate Normals 1991–2020
|access-date = September 30, 2024
}}
</ref><ref>
{{cite web
|url = https://climate.weather.gc.ca/climate_normals/results_1981_2010_e.html?searchType=stnName&txtStationName=lethbridge&searchMethod=contains&txtCentralLatMin=0&txtCentralLatSec=0&txtCentralLongMin=0&txtCentralLongSec=0&stnID=2263&dispBack=0
|publisher = Environment and Climate Change Canada
|title = Canadian Climate Normals 1981–2010
|access-date = September 30, 2024
}}
</ref><ref name="Lethbridge">{{cite web
| url = http://climate.weather.gc.ca/climate_data/daily_data_e.html?hlyRange=%7C&dlyRange=1886-06-01%7C1921-07-31&mlyRange=1886-01-01%7C1921-12-01&StationID=2262&Prov=AB&urlExtension=_e.html&searchType=stnProx&optLimit=specDate&StartYear=1840&EndYear=2016&selRowPerPage=25&Line=0&txtRadius=25&optProxType=navLink&txtLatDecDeg=49.695&txtLongDecDeg=112.7675&timeframe=2&Year=1886&Month=7
| title = Lethbridge
| work = Canadian Climate Data
| date = October 31, 2011
| publisher = Environment and Climate Change Canada
| access-date = May 15, 2016
| archive-date = October 11, 2018
| archive-url = https://web.archive.org/web/20181011172937/http://climate.weather.gc.ca/climate_data/daily_data_e.html?hlyRange=
| url-status = live
}}</ref><ref name="Lethbridge CDA">{{cite web
| url = http://climate.weather.gc.ca/climate_normals/results_e.html?searchType=stnName&txtStationName=lethbridge&searchMethod=contains&txtCentralLatMin=0&txtCentralLatSec=0&txtCentralLongMin=0&txtCentralLongSec=0&stnID=2265&dispBack=0
| title = Lethbridge CDA
| work = Canadian Climate Normals 1971–2000
| date = January 19, 2011
| publisher = Environment and Climate Change Canada
| access-date = May 15, 2016
| archive-date = October 11, 2018
| archive-url = https://web.archive.org/web/20181011172933/http://climate.weather.gc.ca/climate_normals/results_e.html?searchType=stnName&txtStationName=lethbridge&searchMethod=contains&txtCentralLatMin=0&txtCentralLatSec=0&txtCentralLongMin=0&txtCentralLongSec=0&stnID=2265&dispBack=0
| url-status = live
}}</ref><ref name="CCN3">{{cite web
| url = ftp://ftp.tor.ec.gc.ca/Pub/Normals/English/ALTA/ALTA_FORE-ROCK_ENG.csv
| title = Lethbridge A, Alberta
| work = Canadian Climate Normals 1981–2010
| publisher = Environment and Climate Change Canada
| archive-url = https://web.archive.org/web/20200311113314/ftp://ftp.tor.ec.gc.ca/Pub/Normals/English/ALTA/ALTA_FORE-ROCK_ENG.csv
| archive-date = 2020-03-11
| url-status = dead
| access-date = October 3, 2013}}</ref><ref name="April 1910">{{cite web
| url = http://climate.weather.gc.ca/climate_data/daily_data_e.html?hlyRange=%7C&dlyRange=1886-06-01%7C1921-07-31&mlyRange=1886-01-01%7C1921-12-01&StationID=2262&Prov=AB&urlExtension=_e.html&searchType=stnName&optLimit=yearRange&StartYear=1840&EndYear=2016&selRowPerPage=25&Line=1&searchMethod=contains&Month=4&Day=15&txtStationName=lethbridge&timeframe=2&Year=1910
| title = April 1910
| work = Canadian Climate Data
| date = October 31, 2011
| publisher =Environment and Climate Change Canada
| access-date = May 15, 2016
| archive-date = October 11, 2018
| archive-url = https://web.archive.org/web/20181011172950/http://climate.weather.gc.ca/climate_data/daily_data_e.html?hlyRange=
| url-status = live
}}</ref><ref name="January 2015">{{cite web
| url = http://climate.weather.gc.ca/climate_data/daily_data_e.html?hlyRange=1994-06-07%7C2016-05-14&dlyRange=1908-02-01%7C2016-05-14&mlyRange=1908-01-01%7C2007-11-01&StationID=2265&Prov=AB&urlExtension=_e.html&searchType=stnProx&optLimit=specDate&Month=1&Day=1&StartYear=1840&EndYear=2016&Year=2015&selRowPerPage=25&Line=0&txtRadius=25&optProxType=navLink&txtLatDecDeg=49.630277777778&txtLongDecDeg=112.79972222222&timeframe=2
| title = January 2015
| work = Canadian Climate Data
| date = October 31, 2011
| publisher = Environment and Climate Change Canada
| access-date = May 15, 2016
| archive-date = December 11, 2018
| archive-url = https://web.archive.org/web/20181211123330/http://climate.weather.gc.ca/climate_data/daily_data_e.html?hlyRange=1994-06-07
| url-status = live
}}</ref>
|date=August 2010
}}