Lethbridge, Alberta Weather by Month and Climate Averages

How much rain does Lethbridge get?

Lethbridge gets 315 mm of precipitation in an average year, spread over about 85 days with measurable rain. That is fewer rainy days than 76% of Canada.

June is the wettest month, with 77 mm. January is the driest, with 9 mm. June has the most rainy days, about 10.

The longest dry spell in the last five years lasted 14 days, to October 9, 2021.

Lethbridge weather by month

Lethbridge weather in January

In January, Lethbridge averages a high of 1°C and a low of -10°C. It gets 9 mm of precipitation over about 6 rainy days. The sun is out about 37% of daylight hours. The January record high is 20°C (2015) and the record low is -38°C (2024).

Lethbridge weather in February

In February, Lethbridge averages a high of 2°C and a low of -11°C. It gets 10 mm of precipitation over about 7 rainy days. The sun is out about 36% of daylight hours. The February record high is 18°C (2005) and the record low is -36°C (2021).

Lethbridge weather in March

In March, Lethbridge averages a high of 7°C and a low of -6°C. It gets 12 mm of precipitation over about 7 rainy days. The sun is out about 38% of daylight hours. The March record high is 21°C (2015) and the record low is -38°C (2019).

Lethbridge weather in April

In April, Lethbridge averages a high of 12°C and a low of -1°C. It gets 27 mm of precipitation over about 8 rainy days. The sun is out about 39% of daylight hours. The April record high is 29°C (2012) and the record low is -23°C (2018).

Lethbridge weather in May

In May, Lethbridge averages a high of 18°C and a low of 4°C. It gets 45 mm of precipitation over about 8 rainy days. The sun is out about 41% of daylight hours. The May record high is 32°C (2006) and the record low is -9°C (2013). May is one of the most comfortable months to visit.

Lethbridge weather in June

In June, Lethbridge averages a high of 21°C and a low of 8°C. It gets 77 mm of precipitation over about 10 rainy days. The sun is out about 45% of daylight hours. The June record high is 37°C (2021) and the record low is -1°C (2009).

Lethbridge weather in July

In July, Lethbridge averages a high of 26°C and a low of 11°C. It gets 28 mm of precipitation over about 7 rainy days. The sun is out about 68% of daylight hours. The July record high is 37°C (2021) and the record low is 4°C (2010). July is one of the most comfortable months to visit.

Lethbridge weather in August

In August, Lethbridge averages a high of 25°C and a low of 9°C. It gets 29 mm of precipitation over about 8 rainy days. The sun is out about 58% of daylight hours. The August record high is 39°C (2018) and the record low is 2°C (2018). August is one of the most comfortable months to visit.

Lethbridge weather in September

In September, Lethbridge averages a high of 20°C and a low of 5°C. It gets 34 mm of precipitation over about 7 rainy days. The sun is out about 57% of daylight hours. The September record high is 36°C (2022) and the record low is -11°C (2019). September is one of the most comfortable months to visit.

Lethbridge weather in October

In October, Lethbridge averages a high of 13°C and a low of 0°C. It gets 21 mm of precipitation over about 6 rainy days. The sun is out about 49% of daylight hours. The October record high is 28°C (2010) and the record low is -21°C (2020).

Lethbridge weather in November

In November, Lethbridge averages a high of 6°C and a low of -6°C. It gets 13 mm of precipitation over about 6 rainy days. The sun is out about 38% of daylight hours. The November record high is 23°C (2016) and the record low is -29°C (2022).

Lethbridge weather in December

In December, Lethbridge averages a high of 1°C and a low of -11°C. It gets 10 mm of precipitation over about 6 rainy days. The sun is out about 38% of daylight hours. The December record high is 17°C (2021) and the record low is -38°C (2017).

Sunshine, humidity and wind in Lethbridge

July is the sunniest month in Lethbridge, with sunshine about 68% of daylight hours. February is the cloudiest, at 36%. Over the year the sun shines about 45% of daylight hours. Lethbridge is sunnier than 98% of Canada.

Humidity peaks in January at 65% and is lowest in August at 48%.

Lethbridge has about 5 days a year above 32°C. Lethbridge is hotter than 64% of Canada.

First and last freeze in Lethbridge

The first fall freeze in Lethbridge typically comes around September 17, and the last spring freeze around May 13. That leaves a frost-free growing season of about 127 days.

Lethbridge weather records

The hottest temperature on record at the Lethbridge station is 39°C, on August 10, 2018. The coldest is -38°C, on March 2, 2019.

The wettest day on record brought 88 mm of rain, on September 10, 2005.

The best time to visit Lethbridge

The most comfortable time to visit is typically May and July to September, when daytime highs sit near 22°C.

Winter (December–February) is cold, with average highs around 1°C and lows near -10°C.

Spring (March–May) is chilly, with average highs around 12°C and lows near -1°C.

Summer (June–August) is warm, with average highs around 24°C and lows near 9°C.

Autumn (September–November) is mild, with average highs around 13°C and lows near 0°C.

Lethbridge climate questions

How much rain does Lethbridge get?

Lethbridge gets 315 mm of precipitation in an average year, over about 85 rainy days.

What is the wettest month in Lethbridge?

June is the wettest month in Lethbridge, with 77 mm. January is the driest, with 9 mm.

How many rainy days does Lethbridge have a year?

Lethbridge has about 85 days with measurable rain in an average year. June has the most, about 10.

What is the hottest month in Lethbridge?

July is the warmest month in Lethbridge, with an average high of 26°C.

What is the coldest month in Lethbridge?

February is the coldest month in Lethbridge, with an average low of -11°C.

What is the record high temperature in Lethbridge?

The record high at the Lethbridge station is 39°C, set on August 10, 2018. The record low is -38°C, on March 2, 2019.

What is the sunniest month in Lethbridge?

July is the sunniest month in Lethbridge, with sunshine about 68% of daylight hours. February is the cloudiest.

When is the first frost in Lethbridge?

The first fall freeze in Lethbridge typically comes around September 17. The last spring freeze is around May 13.

What is the best time to visit Lethbridge?

The most comfortable time to visit is typically May and July to September, when daytime highs sit near 22°C.