nomadseason

Monthly climate in Lethbridge, Canada

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Lethbridge features a humid continental climate (Dfb). Temperatures typically range between -9 °C (17 °F) and 19 °C (67 °F) through the year, but rarely can drop to -38 °C (-35 °F) or can rise to as high as 40 °C (103 °F). The average annual precipitation amounts to about 395 mm (15.5 inches) and receives 76 rainy days on the 1 mm (0.04 inches) threshold annually. Lethbridge enjoys an average of 3136 hours of sunshine throughout the year, and daylight varies from 8 hours 10 minutes to 16 hours 13 minutes per day.

Monthly average temperatures in Lethbridge, Canada

The warmest months in Lethbridge are June, July and August, with daily mean temperatures ranging from 16 to 19 °C (62 - 67 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -9 to -4 °C (17 - 26 °F) throughout the day. On average each year, Lethbridge experiences 49 days above 25 °C (77.0 °F) and 145 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Lethbridge. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum12°C
(54°F)		14°C
(57°F)		18°C
(65°F)		27°C
(82°F)		30°C
(86°F)		35°C
(95°F)		37°C
(98°F)		40°C
(103°F)		34°C
(93°F)		27°C
(81°F)		22°C
(72°F)		16°C
(61°F)
Mean maximum10°C
(51°F)		10°C
(51°F)		15°C
(60°F)		22°C
(72°F)		27°C
(82°F)		28°C
(84°F)		35°C
(95°F)		35°C
(96°F)		31°C
(88°F)		24°C
(75°F)		16°C
(61°F)		13°C
(56°F)
Average high-0°C
(32°F)		-4°C
(26°F)		5°C
(41°F)		10°C
(51°F)		18°C
(64°F)		22°C
(73°F)		27°C
(81°F)		26°C
(79°F)		20°C
(68°F)		11°C
(52°F)		5°C
(42°F)		1°C
(33°F)
Daily mean-5°C
(24°F)		-9°C
(17°F)		-1°C
(31°F)		4°C
(40°F)		12°C
(53°F)		16°C
(62°F)		19°C
(67°F)		19°C
(66°F)		13°C
(56°F)		5°C
(42°F)		1°C
(33°F)		-4°C
(26°F)
Average low-9°C
(16°F)		-13°C
(8°F)		-6°C
(21°F)		-1°C
(30°F)		6°C
(42°F)		10°C
(50°F)		12°C
(53°F)		11°C
(52°F)		7°C
(45°F)		0°C
(33°F)		-4°C
(25°F)		-8°C
(18°F)
Mean minimum-30°C
(-21°F)		-29°C
(-19°F)		-21°C
(-6°F)		-11°C
(13°F)		-1°C
(30°F)		5°C
(41°F)		7°C
(45°F)		5°C
(41°F)		-1°C
(31°F)		-10°C
(14°F)		-18°C
(1°F)		-22°C
(-8°F)
Minimum-36°C
(-32°F)		-36°C
(-33°F)		-38°C
(-35°F)		-19°C
(-2°F)		-6°C
(22°F)		3°C
(37°F)		5°C
(42°F)		3°C
(39°F)		-2°C
(28°F)		-18°C
(0°F)		-23°C
(-8°F)		-35°C
(-31°F)

Compare climate in Lethbridge with other places

Compare temperature, precipitation, sunshine, UV index in Lethbridge, Canada with other places around the world.

Monthly average precipitation in Lethbridge, Canada

Lethbridge usually has the most precipitation in May, June and September, with an average of 7 rainy days and 51 mm (2.0 inches) of precipitation per month. The driest months in Lethbridge are January, March and December. On average, 18 mm (0.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Lethbridge. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)10 (0.4)31 (1.2)23 (0.9)35 (1.4)56 (2.2)62 (2.4)28 (1.1)25 (1.0)35 (1.4)35 (1.4)34 (1.3)22 (0.8)
Average precipitation days (≥ 1 mm)3878810545765

Monthly sunshine hours in Lethbridge, Canada

The sunniest months in Lethbridge are June, July and August, when the sun shines an average of 12 hours 5 minutes a day. Least sunny months in Lethbridge: January, November and December receive an average of 5 hours 10 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Lethbridge. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours147180260282320363403344271235168159
Mean daily daylight hours8h 39m10h 7m11h 56m13h 48m15h 24m16h 13m15h 46m14h 19m12h 31m10h 41m9h 2m8h 10m

Solar UV radiation in Lethbridge, Canada

Lethbridge experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 9, which corresponds to the Very High category of sun exposure. January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Lethbridge UV Index data.

Average daily maximum UV levels by month for Lethbridge. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)235689987422