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Alert Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Alert.
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Climate overview of Alert
Temperatures in Alert, Canada, vary greatly throughout the year. July is the hottest month at 8°C (46°F), while February is the coldest at -28°C (-18°F).
The city has an arid climate, receiving only 220 mm (8.7 in) of rain/snowfall per year. The sunniest month is May, with 14.3 hours of sunshine per day on average.
Alert Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Alert - and find the best time to visit.
Monthly Temperature in Alert
The climate in Alert is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a chilly 8°C (46°F) in July to a very cold -28°C (-18°F) in February.
Nighttime temperatures range from 3°C (37°F) in July to -34°C (-29°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Alert
Alert is known for its low rain/snowfall, with yearly precipitation amounts around 220 mm (8.7 in). The seasons in Alert bring significant changes in precipitation. The wettest month, July, receives moderate rainfall, with an average of 34 mm (1.3 in) of precipitation. This rainfall is distributed across 8 rainy days.
In contrast, the driest month, February, experiences much less snowfall, totaling 9.5 mm (0.4 in) over 6 snowy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Alert Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Alert
In Alert, summer days are longer and more sunny, with daily sunshine hours peaking at 14.3 hours in May. As the darker season arrives, the brightness of the sun becomes less. January sees a soft sun for only 0.0 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Alert by Month
The relative humidity is high throughout the year in Alert.
The city experiences its highest humidity in June, reaching 87%. In January, the humidity drops to its lowest level at 66%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Alert
The average wind speed over the year ranges from 1 m/s (2 knots) to 3 m/s (6 knots). It is lower in March and April and higher in June, July, August and September. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Alert
The most favourable weather available in Alert usually occurs in August. Conditions are generally most challenging in January, February, March, April, May, June, July, September, October, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
very cold
Feb
very cold
Mar
very cold
Apr
very cold
May
very cold
Jun
cold
Jul
cold
Aug
mixed
Sep
very cold
Oct
very cold
Nov
very cold
Dec
very cold
- Best overall: August
- Warmest weather: July
- Most sunshine: May
- Seasonal pattern: Very little rainfall year-round, with cold summers and very cold winters
- Coldest conditions: February, with freezing nights around -34°C (-29°F).
Frequently asked questions about the climate in Alert
What is the best time to visit Alert?
August typically offers the most optimal weather in Alert. In contrast, January, February, March, April, May, June, July, September, October, November and December tend to have less optimal conditions. Alert has very little rainfall year-round, with cold summers and very cold winters.
What temperatures can I expect in Alert?
Daytime highs range from -28°C (-18°F) in February to 8°C (46°F) in July. Nighttime lows range from -34°C (-29°F) to 3°C (37°F). Temperatures vary considerably through the year.
How much rain does Alert get?
Annual rainfall is around 220 mm (8.7 in). July is the wettest month with 34 mm (1.3 in), while February is the driest with 9.5 mm (0.4 in).
How sunny is Alert?
Alert receives around 1,899 hours of sunshine per year. May is the sunniest month with 428 hours, while January is the cloudiest with just 0 hours.
Alert 3-Day Forecast
Alert on the map
Alert is highlighted - select any city to see its climate.
Popular in September
Where to go in September - average daytime high across popular destinations.
Toronto
22°C (72°F) Niagara Falls23°C (73°F) Montréal
22°C (72°F) Ottawa22°C (72°F) Quebec City
20°C (68°F) Vancouver19°C (66°F) Calgary19°C (66°F) Whistler15°C (59°F) Bucket list
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