Tomorrow's Weather Calgary: Thunderstorms Hit Afternoon & Evening

Tomorrow's forecast:

Morning: Clear Skies, Cool Start at 3°C with Light Winds

    The morning in Calgary begins with clear skies and a crisp temperature near 3°C, accompanied by gentle winds around 9 km/h. This calm start offers a refreshing atmosphere before the weather shifts later in the day. The chance of light precipitation remains low at 20%, making it a relatively dry morning.

Activities Recommendations for the morning of May 18, 2026:

• Dog Walks & Errands: Enjoy a peaceful morning walk or run errands with minimal weather disruptions.

• Outdoor Birding: Ideal conditions for bird enthusiasts to explore St. Patrick’s Island and spot local species.

• Morning Commute: Light winds and clear skies ensure a smooth and comfortable start to your day.

Temperatures rising from -1°C early morning to a mild 9°C by noon

(Click above to view interactive map)

Afternoon: Thunderstorms Arrive with Mild 14°C Temperatures

    Afternoon weather turns unsettled as thunderstorms develop, bringing a 40% chance of rain and temperatures rising to a mild 14°C. Winds remain light at 10 km/h, but the stormy conditions call for caution during outdoor activities. UV levels will be moderate around midday, so some sun exposure is still expected between showers.

Activities Recommendations for the afternoon of May 18, 2026:

• Outdoor Events: Plan for indoor alternatives or bring rain gear when attending Victoria Day festivities or the Calgary Zoo visit.

• Commute: Be prepared for possible delays due to wet roads and stormy conditions during afternoon travel.

• Photography: Capture dramatic storm clouds but stay safe and dry during the thunderstorms.

Evening: Thunderstorms Continue, Cooling to 10°C with Fog Patches

    Thunderstorms persist into the evening with temperatures cooling to around 10°C and light winds near 9 km/h. As night falls, expect partly cloudy skies with fog patches developing late overnight. The risk of isolated storms remains low but present, and the Yellow Frost Advisory suggests chilly conditions overnight.

Activities Recommendations for the evening of May 18, 2026:

• Evening Commute: Exercise caution on roads as wet conditions and fog patches may reduce visibility.

• Outdoor Dining: Consider indoor dining options due to ongoing storms and cooler temperatures.

• Gardening: Protect sensitive plants from frost overnight by covering them before dusk.

Consistent light wind speeds around 8-10 km/h throughout the morning

(Click above to view detailed chart)

Packing preparations for tomorrow:

• Light waterproof jacket or umbrella for afternoon and evening thunderstorms

• Layered clothing to adjust from cool morning to mild afternoon and cooler evening

• Hat and sunglasses for moderate midday UV exposure

• Protective covers for outdoor plants due to frost advisory

• Comfortable shoes suitable for wet conditions

• Keep an eye on weather updates for any changes

For active alerts in your area, visit your Alerts page. This article was generated with the use of OpenAI and The Weather Network's forecast data. The article was reviewed by the editorial team for accuracy and clarity. For more details visit our AI Code of Ethics. For feedback, visit our survey.