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Climate guideThirty-year normals for Lethbridge, Alberta
Lethbridge climate by month
Cold semi-arid · BSkBest May · Aug–Sep
Annual mean7°day and night
Seasonal swing24°warmest vs coolest
Precipitation394 mm68 wet days a year
49.70° N, 112.82° WElevation 907 mUTC−6 · Mountain Daylight Time
When to goLethbridge · weather score
Best timeMay · Aug–Sep
October: high / low14° / 2°
iSummary
What the weather is like
Lethbridge has a cold semi-arid climate (Köppen BSk): little rain, large day–night swings and strong sunshine.
The warmest month is July, when afternoons average 27° and nights 12°. December is the coolest month, with highs of 1° and lows of -9°. The difference between the warmest and the coolest month is about 24°, a large swing typical of continental interiors.
About 394 mm of precipitation falls in an average year. June is the wettest month (88 mm, 10 wet days) and January the driest (14 mm, 3 wet days). Cloud cover ranges from 22% in July to 44% in March.
Compared with Ottawa, the capital, Lethbridge is 0.5° warmer on a July afternoon and receives less precipitation over the year.
Year in figures
- Hottest afternoons
- 27° · July
- Coldest nights
- -10° · January
- Wettest month
- June
- Driest month
- January
- Clearest skies
- July · 22% cloud
- Longest day
- 16 h 17 min
- Shortest day
- 8 h 09 min
iiCharts
Twelve months at a glance
Temperature and precipitation
Daily high/low range bars, monthly precipitation columnsTemperature curve
Average high, lowDaylight
Hours between sunrise and sunset on the 15th of each monthiiiData table
Climate normals month by month
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Average high | 1° | 3° | 8° | 14° | 19° | 23° | 27° | 27° | 22° | 14° | 6° | 1° |
| Average low | -10° | -8° | -5° | 0° | 5° | 10° | 12° | 11° | 7° | 2° | -4° | -9° |
| Precipitation | 14 mm | 11 mm | 19 mm | 27 mm | 64 mm | 88 mm | 42 mm | 38 mm | 38 mm | 22 mm | 16 mm | 15 mm |
| Wet days (≥1 mm) | 3.3 | 4 | 3.7 | 5.7 | 8.2 | 10.2 | 7.2 | 6.2 | 4.5 | 4.2 | 6 | 5.2 |
| Cloud cover | 43% | 41% | 44% | 42% | 39% | 35% | 22% | 25% | 30% | 35% | 43% | 41% |
| Daylight | 8h 36 | 10h 08 | 11h 51 | 13h 45 | 15h 23 | 16h 17 | 15h 54 | 14h 28 | 12h 38 | 10h 49 | 9h 06 | 8h 09 |
| Month score | 45 | 44 | 43 | 58 | 77 | 74 | 73 | 77 | 89 | 67 | 38 | 41 |
ivMonth by month
Lethbridge in every month
January45
1° / -10°
14 mm · 3.3 wet days
February44
3° / -8°
11 mm · 4 wet days
March43
8° / -5°
19 mm · 3.7 wet days
April58
14° / 0°
27 mm · 5.7 wet days
May77
19° / 5°
64 mm · 8.2 wet days
June74
23° / 10°
88 mm · 10.2 wet days
July73
27° / 12°
42 mm · 7.2 wet days
August77
27° / 11°
38 mm · 6.2 wet days
September89
22° / 7°
38 mm · 4.5 wet days
October67
14° / 2°
22 mm · 4.2 wet days
November38
6° / -4°
16 mm · 6 wet days
December41
1° / -9°
15 mm · 5.2 wet days