Lethbridge swings 35°C across the year, from 25°C highs in July to -10°C lows in January, and June is usually the wettest month in a year that brings about 392 mm of precipitation. Over 10 years of recorded weather it averages 61 days a year at 25°C or above, 18 of them at 30°C or above, 148 frost nights, and rain on 80 days.
Warmest month
July
25°C average high
Coldest month
January
-10°C average low
Wettest month
June
392 mm a year
Comfortable
4 months
May, July, August and September
Residents
103,000
share this forecast
Most accurate here
European
98/100 CheckWeather Score
Warm days
61 days
a year at 25°C or above
Frost nights
148 nights
a year below 0°C
Rain days
80 days
a year with 1 mm or more
Day counts are from the ERA5 reanalysis for Lethbridge’s grid square, 2016 to 2025, counted the same way for every city so the numbers compare. A reanalysis square is an area, not a weather station, so it is good for counting days and not for a single day’s record.
The weather map: all three models at once
Env. Canada, European, American side by side around Lethbridge and nearby towns.Live rain radar →
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Lethbridge hourly forecast: next 14 hours
consensus of the three models
Rain in the next 24 hours, model by model
each model's own hourly precipitation, side by side
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Lethbridge 10-day forecast, out to 14 days
where the models agree, and where they split
Today
Cloudy
5°-1°
models agree
Tomorrow
Cloudy
4°-2°
models agree
Mon
Cloudy
6°-4°
±3°
Tue
Cloudy
9°-2°
±3°
Wed
Light snow
4°-3°
±8°
Thu
Light snow
3°-3°
±8°
Fri
Snow
3°-4°
±11°
Sat
Cloudy
6°-7°
±5°
Sun
Mostly clear
8°-1°
±6°
Mon
Partly cloudy
11°3°
±2°
Tue
Cloudy
11°1°
models agree
Wed
Cloudy
13°2°
±8°
Thu
Cloudy
13°5°
±6°
Lethbridge, Alberta is at its warmest in Jul (average highs near 25°C) and coldest in Jan (lows around -10°C), with roughly 392 mm of precipitation across the year. Below, compare what Env. Canada, European, American forecast for Lethbridge right now, and see exactly where they disagree.
average daytime high and overnight low across a typical year (1991-2020)
Jan
-2°
-10°
Feb
0°
-10°
Mar
5°
-6°
Apr
11°
-1°
May
17°
4°
Jun
22°
9°
Jul
25°
11°
Aug
25°
11°
Sep
19°
7°
Oct
12°
1°
Nov
3°
-4°
Dec
-1°
-9°
Source: 1991-2020 averages, ERA5 for this place adjusted with NASA POWER.
How Lethbridge's weather has changed since 1995
30 years of daily data, 1995-2024, shown as change
+0.5°C
Around Lethbridge, the difference between 1995-2004 and 2015-2024 is +0.5°C, within the normal swing from year to year.
1995each stripe is one year2024
cooler than averagearound averagewarmer than average
Days above 30°C
5 more days a year
2015-2024 against 1995-2004. Within the normal year-to-year swing
Frost nights
10 fewer nights a year
2015-2024 against 1995-2004, below 0°C. Within the normal year-to-year swing
Average wind
no clear change
2015-2024 against 1995-2004. Within the normal year-to-year swing
Bars: each year against the area's 30-year average. Dashed lines: the average of the first and the last ten years.
See the numbers year by year
Year
Temp vs average
Days >30°C vs avg
Frost nights vs avg
Wind vs avg
1995
−0.8°C
−16
+10
−6%
1996
−2.7°C
−4
+20
−2%
1997
−0.3°C
−11
+7
+3%
1998
+1.1°C
+8
−10
−8%
1999
+0.9°C
−2
−3
+7%
2000
−0.4°C
+5
+10
−2%
2001
+0.7°C
+7
−9
+5%
2002
−0.8°C
−1
+14
+3%
2003
+0.6°C
+23
−3
−2%
2004
+0.3°C
−8
+0
−2%
2005
−0.4°C
−11
−14
+0%
2006
+0.7°C
+2
−2
+0%
2007
+0.7°C
+11
−14
+5%
2008
−0.4°C
−6
+6
+0%
2009
−1.0°C
−6
+20
+3%
2010
−0.6°C
−15
−7
−4%
2011
−1.0°C
−10
+12
+7%
2012
+0.3°C
+1
+5
+5%
2013
−0.4°C
−9
+12
−2%
2014
−0.8°C
−4
+0
−4%
2015
+1.0°C
+1
−20
−4%
2016
+0.8°C
−10
−25
−2%
2017
−0.3°C
+5
−1
−2%
2018
−0.5°C
+1
+6
−4%
2019
−1.3°C
−7
+15
−4%
2020
+0.2°C
+3
+3
+9%
2021
+1.0°C
+24
−6
+0%
2022
+0.2°C
+16
−6
+5%
2023
+1.8°C
+8
−12
−4%
2024
+0.9°C
+9
−11
−2%
Source: NASA POWER daily data from the MERRA-2 reanalysis, 1995-2024. Each value describes a grid square of about 50 km around Lethbridge, not a weather station, and a square that takes in sea or a large lake runs milder than the city itself. That is why this section shows change against the square's own 30-year average rather than counts you could compare with a local station. Rain and snow are left out because their long-term record in this dataset is not consistent over time. "Within the normal year-to-year swing" means the change is smaller than the usual differences between single years.
Which forecast is most accurate in Lethbridge?
CheckWeather Score, graded against the weather that actually happened
Provider
CheckWeather-score
Temp
Wind
Rain
Run by
European ★ Best
98
/100rank #1
96±0.2°C
99±0.7 km/h
100100% hit
ECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
EC
Env. Canada
86
/100rank #2
78±1.2°C
96±1.8 km/h
8994% hit
Environment and Climate Change CanadaDorval, Québec, Canada
American
81
/100rank #3
72±1.5°C
94±2.9 km/h
8290% hit
NOAA / NCEP (United States)College Park, Maryland, USA
The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in Canada? Give each 1 to 5 stars.
Env. CanadaGEM model
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EuropeanECMWF
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AmericanNOAA GFS
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.
Where the models disagree
temperature and rain, judged separately
Day
Temperature
Rain
Today
±2°4° to 5°
±7%6% to 13% chance
Tomorrow
±1°3° to 4°
±9%9% to 18% chance
Mon
±3°5° to 8°
±5%1% to 6% chance
Tue
±3°7° to 11°
±12%6% to 18% chance
Wed
±8°0° to 8°
±7%25% to 32% chance
The models often agree on temperature and still split on rain, and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.
Sunrise and sunset in Lethbridge
today, local time
Sunrise
08:07
Sunset
18:22
Daylight
10h 15m
Common questions
What's the weather in Lethbridge today?
Saturday, October 24: Env. Canada, the European and the American model agree on a high near 5° in Lethbridge today. Tomorrow: cloudy, around 4°, with a 18% chance of rain. The forecast on this page refreshes live.
Will it rain in Lethbridge today or tomorrow?
Rain looks unlikely in Lethbridge on Sunday, October 25: no model gives more than 18% (Env. Canada 14%, European 18%, American 9%). On Saturday, October 24 the highest chance of rain from any model is 13%. The hourly strip and the model-by-model rain panel above update live.
Which forecast is most accurate for Lethbridge?
Over the last 30 days, the European model has been the most accurate for Lethbridge (CheckWeather Score 98/100), ahead of the Env. Canada at 86. We grade every model against the recorded weather. See the CA accuracy scoreboard for the full method.
What is the warmest month in Lethbridge?
July is typically the warmest month in Lethbridge, with average highs around 25°C.
How cold does Lethbridge get?
The coldest month in Lethbridge is January, when overnight lows average about -10°C.
How much rain does Lethbridge get?
Lethbridge sees roughly 392 mm of precipitation a year, with June usually the wettest month.
Is Lethbridge getting warmer?
Not clearly. In NASA's reanalysis for the area around Lethbridge, the difference between 1995-2004 and 2015-2024 is 0.5°C, within the normal swing from year to year.
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