Avg High
Calgary in August
Avg Low
Rain
Daylight
14h
What to expect
In Calgary, August sits in late summer, with a clear seasonal rhythm running through the month. Most days feel warm without being relentless, with evenings that can feel like a different gear. Comfort is usually predictable, so a standard day plan works well. You get long daylight windows for full-day exploring.
August in context
How it compares to the rest of the year in Calgary.
Hottest (avg)
#2 / 12
Wettest (avg)
#3 / 12
Daylight Hours
#4 / 12
Windiest (avg)
#12 / 12
Highest UV
#4 / 12
Most Humid
#8 / 12
Monthly climate breakdown
Temperature
- Daytime high
-
- Nighttime low
-
- Feels like (avg)
-
Sunshine
- Daylight hours
- 14.5 h
- UV index (max)
- 7
- Typical sun hours
- 05:24 - 19:54
Rain & Snow
- Total rain
-
- Rainy days
- 12 days
- Cloud cover (avg)
- 47%
Humidity & Wind
- Humidity (avg)
- 66%
- Wind (avg)
-
- Wind (max gusts)
-
Daily climate explorer
Day 15 selected for August. Typical high 22.5°C and low 11.0°C.
Typical disruptions in August
Based on 30 years of historical data, these are the disruption patterns most likely to affect plans in August.
Cold High impact
Cold feels-like nights Measures: Cold feels-like nights (min <=5C). Observed about 17% of days (5.3 days/month) in August. Historical risk signal only, not a day-by-day forecast.
5.3 days / month
~17% of days
Why this matters
- Expected days 5.3 days / month
- Probability ~17% of days
- Intensity Up to ~5°C (P95)
Cold feels-like nights are possible on ~5 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Rain High impact
Washout risk Measures: Washout day risk. Observed about 12% of days (3.6 days/month) in August. Historical risk signal only, not a day-by-day forecast.
3.6 days / month
~12% of days
Why this matters
- Expected days 3.6 days / month
- Probability ~12% of days
- Intensity Up to ~25mm (P95)
Washout conditions are possible on ~4 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain Moderate
Rain disruption Measures: Likely rain disruption days. Observed about 13% of days (4.0 days/month) in August. Historical risk signal only, not a day-by-day forecast.
4.0 days / month
~13% of days
Why this matters
- Expected days 4.0 days / month
- Probability ~13% of days
- Intensity Up to ~24mm (P95)
Rain disruption risk appears on ~4 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Heat Moderate
Hot days Measures: Hot days (>=30C). Observed about 4% of days (1.3 days/month) in August. Historical risk signal only, not a day-by-day forecast.
1.3 days / month
~4% of days
Why this matters
- Expected days 1.3 days / month
- Probability ~4% of days
- Intensity Up to ~34°C (P95)
Hot days are possible on ~1 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Visibility Minor
Fog-likely signal Measures: Fog-likely visibility proxy. Observed about 3% of days (0.8 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.8 days / month
~3% of days
Why this matters
- Expected days 0.8 days / month
- Probability ~3% of days
- Intensity Up to ~98% (P95)
Fog-likely conditions are possible on ~1 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Show all disruptions (17 more)
Rain High impact
Heavy rain days Measures: Heavy rain days (>=10mm). Observed about 6% of days (1.9 days/month) in August. Historical risk signal only, not a day-by-day forecast.
1.9 days / month
~6% of days
Why this matters
- Expected days 1.9 days / month
- Probability ~6% of days
- Intensity Up to ~32mm (P95)
Heavy rain is possible on ~2 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain High impact
Washout run Measures: Multi-day washout runs. Observed about 0.7 days/month in August. Historical risk signal only, not a day-by-day forecast.
0.7 days / month
Probability unavailable
Why this matters
- Expected days 0.7 days / month
- Probability —
- Intensity Up to ~32mm (P95)
Multi-day washout runs are possible on ~1 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Wind High impact
Strong gusts Measures: Strong gust days (>=60 km/h). Observed about 1% of days (0.3 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.3 days / month
~1% of days
Why this matters
- Expected days 0.3 days / month
- Probability ~1% of days
- Intensity Up to ~70km/h (P95)
Strong gusts are possible on ~0 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Wind High impact
Stormy conditions Measures: Storm-impact proxy days. Observed about 1% of days (0.3 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.3 days / month
~1% of days
Why this matters
- Expected days 0.3 days / month
- Probability ~1% of days
- Intensity Up to ~70km/h (P95)
Stormy conditions are possible on ~0 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Rain High impact
Very heavy rain Measures: Very heavy rain days (>=25mm). Observed about 1% of days (0.2 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.2 days / month
~1% of days
Why this matters
- Expected days 0.2 days / month
- Probability ~1% of days
- Intensity Up to ~51mm (P95)
Very heavy rain is possible on ~0 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Heat Moderate
Hot feels-like days Measures: Hot feels-like days (>=32C). Observed about 1% of days (0.2 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.2 days / month
~1% of days
Why this matters
- Expected days 0.2 days / month
- Probability ~1% of days
- Intensity Up to ~35°C (P95)
Feels-like heat >=32C is possible on ~0 days. Midday activity often needs adjustment around shade, hydration, and indoor fallback options.
Rain Minor
Wet days Measures: Wet days (>=0.1mm). Observed about 48% of days (14.9 days/month) in August. Historical risk signal only, not a day-by-day forecast.
14.9 days / month
~48% of days
Why this matters
- Expected days 14.9 days / month
- Probability ~48% of days
- Intensity Up to ~17mm (P95)
Measurable rain is possible on ~15 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cloud Minor
Cloudy days Measures: Cloudy days (cloud cover >=60%). Observed about 34% of days (10.7 days/month) in August. Historical risk signal only, not a day-by-day forecast.
10.7 days / month
~34% of days
Why this matters
- Expected days 10.7 days / month
- Probability ~34% of days
- Intensity Up to ~100% (P95)
Cloudy skies are possible on ~11 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Rain Minor
Rainy hours Measures: Rain-hours signal (>=3h rain). Observed about 31% of days (9.6 days/month) in August. Historical risk signal only, not a day-by-day forecast.
9.6 days / month
~31% of days
Why this matters
- Expected days 9.6 days / month
- Probability ~31% of days
- Intensity Up to ~20h (P95)
Several rainy hours are possible on ~10 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Rain Minor
Wet most of day Measures: Wet-most-of-day signal (>=6h rain). Observed about 19% of days (6.0 days/month) in August. Historical risk signal only, not a day-by-day forecast.
6.0 days / month
~19% of days
Why this matters
- Expected days 6.0 days / month
- Probability ~19% of days
- Intensity Up to ~22h (P95)
Wet-most-of-day conditions are possible on ~6 days. Outdoor plans can become unreliable, so keep an indoor backup and flexibility around start times.
Wind Minor
Gusty days Measures: Gusty days (>=40 km/h). Observed about 18% of days (5.5 days/month) in August. Historical risk signal only, not a day-by-day forecast.
5.5 days / month
~18% of days
Why this matters
- Expected days 5.5 days / month
- Probability ~18% of days
- Intensity Up to ~60km/h (P95)
Gusty conditions are possible on ~6 days. Exposed activities and transport links are more likely to be disrupted, so keep sheltered alternatives ready.
Cloud Minor
Mostly cloudy days Measures: Mostly cloudy days (cloud cover >=80%). Observed about 16% of days (5.0 days/month) in August. Historical risk signal only, not a day-by-day forecast.
5.0 days / month
~16% of days
Why this matters
- Expected days 5.0 days / month
- Probability ~16% of days
- Intensity Up to ~100% (P95)
Mostly cloudy skies are possible on ~5 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Humidity Minor
High humidity Measures: High humidity days (RH >=80%). Observed about 16% of days (4.9 days/month) in August. Historical risk signal only, not a day-by-day forecast.
4.9 days / month
~16% of days
Why this matters
- Expected days 4.9 days / month
- Probability ~16% of days
- Intensity Up to ~96% (P95)
High humidity is possible on ~5 days. Comfort and pace can drop quickly, so plan shorter outdoor blocks with air-conditioned backup stops.
Cloud Minor
Overcast days Measures: Overcast days (cloud cover >=95%). Observed about 6% of days (1.8 days/month) in August. Historical risk signal only, not a day-by-day forecast.
1.8 days / month
~6% of days
Why this matters
- Expected days 1.8 days / month
- Probability ~6% of days
- Intensity Up to ~100% (P95)
Overcast skies are possible on ~2 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cold Minor
Cold nights Measures: Cold nights (min <=5C). Observed about 4% of days (1.1 days/month) in August. Historical risk signal only, not a day-by-day forecast.
1.1 days / month
~4% of days
Why this matters
- Expected days 1.1 days / month
- Probability ~4% of days
- Intensity Up to ~5°C (P95)
Cold nights are possible on ~1 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Other Minor
Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data Measures: Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data. Observed about 3% of days (0.8 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.8 days / month
~3% of days
Why this matters
- Expected days 0.8 days / month
- Probability ~3% of days
- Intensity Up to ~98 (P95)
Low visibility proxy: same as fog-likely (RH ≥90% AND cloud ≥95%) — true visibility requires hourly visibility data is possible on ~1 days. Fixed-time outdoor plans are safer with a backup option and flexible timing.
Cold Minor
Cold days Measures: Cold days (max <=10C). Observed about 1% of days (0.3 days/month) in August. Historical risk signal only, not a day-by-day forecast.
0.3 days / month
~1% of days
Why this matters
- Expected days 0.3 days / month
- Probability ~1% of days
- Intensity Up to ~10°C (P95)
Cold daytime conditions are possible on ~0 days. Long outdoor blocks become harder to sustain, so layer up and keep a warm indoor fallback nearby.
Frequently asked questions
Is August a good time to visit Calgary?
Typical August days in Calgary reach highs of 23°C (73°F) with nights around 10°C (50°F). It usually feels warm by day and cool after dark. It is among the wetter months, so it is wise to have some indoor backup plans or flexible activities.
What are temperatures like in August?
In August, you can usually expect highs of 23°C (73°F) and lows near 10°C (50°F). That means warm days and cool nights, so pack layers you can add or remove.
How much does it rain in August?
Rainfall in August averages 62 mm (2.4 in) across roughly 12 days. Overall it is a quite rainy time of year, so a light rain jacket and waterproof shoes are very handy.
How many hours of daylight are there in August?
You can expect about 14 hours of daylight in August. Sunrise is typically around 05:24 and sunset near 19:54. You get long days with comfortable amounts of daylight.
How strong is the sun in August?
UV levels are often high (around 7). Regular sunscreen and a hat are recommended.
Is it windy in August?
In August, average wind speeds are around 9 km/h (6 mph), with gusts on the windiest days reaching about 44 km/h (27 mph). On the ground, it is it often feels breezy, especially in more exposed spots or along the coast.