Canada Montreal Weather in May — Climate Guide
May in Montreal is Very Good
Montreal Weather in May — Quick Answer
As of 2026- Avg temp
- 19° / 8°
- Rainfall
- 75mm · 13 days
- Crowds
- Moderate
As of 2026, Montreal in May averages a high of 19°C and low of 8°C with 75mm of rain over about 13 days. Early summer. T-shirt + light cardigan for evenings. Like mid-May in Korea or US Northeast. Mornings/evenings still cool +10°C — pack a layer. Rain shell for occasional showers.
May is Very Good for Montreal.
May brings real spring + festival season start. 8-19°C + 8 sunshine hours + 13 rainy days. Tam-Tams Mont Royal (every Sunday afternoon, free drum circle + bohemian top pick, May-Sep) + Mosaicultures Internationales (biennial flower sculpture at Botanical Garden, May-Oct) starts.
Old Montreal cobblestone + Mont Royal summit + Jean-Talon Market all at peak walkability. BIXI bike share fully operational (May-October season). Patio (terrace) season opens — sidewalk dining everywhere on Boulevard Saint-Laurent + Saint-Denis + Mont-Royal Avenue. Shoulder-season value before June festival surge.
Travel score
Patios open + Tam-Tams start + last shoulder value
May Weather at a Glance
May averages 66°F / 19°C highs and 46°F / 8°C lows with 8 sunshine hours and 13 rainy days. Sunrise 5:25 AM, sunset 8:30 PM = 15 hours daylight. The transformation from winter Montreal to summer Montreal happens between early and late May — patios open mid-month, leaves return to the trees.
May Travel Advice
May is the year's best shoulder month — same patios + Mont Royal hiking as June but 30-40% cheaper hotels. Pre-book Tam-Tams Sundays gathering (free, weather-permitting). Victoria Day long weekend (last Monday) drives domestic travel surge — book hotels 3 weeks ahead. Patio reservations at Joe Beef + Le Mas + Bouillon Bilk fill 1 week ahead for terraces.
Flying In from Overseas
Pre-summer European travelers arrive. Korean Children's Day + Japanese Golden Week early May overlap. Direct flights from London $550-900, Paris $500-850, Frankfurt $550-900, NYC $150-350. Australian autumn — comfortable cool-weather choice.
May Pricing Trends
Last shoulder month: 4-star Downtown $150-370/night, 5-star $300-590, Plateau boutique $110-260. Victoria Day weekend (last Mon) +30%. BIXI 30-day pass $33.
Montreal May Weather Stats
Avg High
19°C
Avg Low
8°C
Rainy Days
13
75mm total
Sunshine
8h
Daily avg
Humidity
62%
Comfortable
UV Index
6
High
Wind
12 km/h
Gusts 26
Sea Temp
8°C
Swimming not advised (cool)
Crowds
Moderate
At attractions
May Sunrise & Sunset
Air Quality
PM2.5
9 μg/m³
PM10
18 μg/m³
Status
Good
Feels-Like Temperature & Wind
Feels like
Daytime
18°C
Nighttime
7°C
Humidity and wind affect how the actual temperature feels.
Wind
12 km/h
Max gust 26 km/h
Activities Recommended for May
May Travel Pros & Cons
Pros
- Tam-Tams Sundays drum circle starts
- Patio terrace season + outdoor dining
- BIXI bike season fully operational
Cons
- Rain 13 days/month
- Victoria Day weekend hotels up
- Mornings/evenings still cool
May Events & Festivals
- Mosaicultures Internationales (May-Sep biennial flower sculpture)
- Tam-Tams Sundays (Mont Royal, drum circle + bohemian top pick, May-Sep weekly)
- Victoria Day (last Monday of May, holiday)
- Open-air patio terraces officially open across the city
- BIXI bike share fully operational
Montreal in May — Full Picture
May brings real spring + festival season start. 8-19°C + 8 sunshine hours + 13 rainy days. Tam-Tams Mont Royal (every Sunday afternoon, free drum circle + bohemian top pick, May-Sep) + Mosaicultures Internationales (biennial flower sculpture at Botanical Garden, May-Oct) starts.
Old Montreal cobblestone + Mont Royal summit + Jean-Talon Market all at peak walkability. BIXI bike share fully operational (May-October season). Patio (terrace) season opens — sidewalk dining everywhere on Boulevard Saint-Laurent + Saint-Denis + Mont-Royal Avenue. Shoulder-season value before June festival surge.
What to Wear & What to Pack
Early summer. T-shirt + light cardigan for evenings. Like mid-May in Korea or US Northeast. Mornings/evenings still cool +10°C — pack a layer. Rain shell for occasional showers.
Packing Checklist
Seasonal Weather Overview
Spring (Mar·Apr·May)
Current10.7°C
1°C
13/mo
Summer (Jun·Jul·Aug)
25°C
14.7°C
11.7/mo
Autumn (Sep·Oct·Nov)
13°C
5°C
12.7/mo
Winter (Dec·Jan·Feb)
-3.3°C
-12°C
13.3/mo
Montreal Monthly Weather Comparison
| Month | High | Low | Rain | Sun | Humid | UV | Crowd | Price |
|---|---|---|---|---|---|---|---|---|
| -5° | -14° | 14d·78mm | 3h | 75% | 1 | Quiet | Low season | |
| -3° | -12° | 12d·62mm | 4.5h | 72% | 2 | Quiet | Low season | |
| 2° | -6° | 13d·75mm | 5.5h | 70% | 3 | Quiet | Shoulder | |
| 11° | 1° | 13d·80mm | 7h | 65% | 5 | Moderate | Shoulder | |
| May (Best) | 19° | 8° | 13d·75mm | 8h | 62% | 6 | Moderate | Shoulder |
| June (Best) | 24° | 13° | 12d·87mm | 9.5h | 65% | 8 | Busy | Peak |
| July (Best) | 26° | 16° | 12d·90mm | 10h | 67% | 9 | Very busy | Peak |
| August (Best) | 25° | 15° | 11d·88mm | 9h | 70% | 7 | Very busy | Peak |
| September (Best) | 20° | 11° | 12d·87mm | 7.5h | 72% | 5 | Busy | Peak |
| 13° | 5° | 12d·78mm | 6h | 75% | 3 | Moderate | Shoulder | |
| 6° | -1° | 14d·92mm | 3.5h | 78% | 2 | Quiet | Low season | |
| -2° | -10° | 14d·88mm | 2.5h | 78% | 1 | Busy | Peak |
View Other Months
Montreal May Hotel Picks
Frequently Asked Questions
Is May a good time to visit Montreal?
Montreal in May is Very Good. Tourist crowds are moderate and flight/hotel prices are shoulder.
What's the average temperature in Montreal in May?
Montreal May averages a high of 19°C and a low of 8°C.
Does it rain much in Montreal in May?
Montreal May averages 75mm of rainfall over about 13 rainy days.
What should I wear in Montreal in May?
Early summer. T-shirt + light cardigan for evenings. Like mid-May in Korea or US Northeast. Mornings/evenings still cool +10°C — pack a layer. Rain shell for occasional showers.
What time are sunrise and sunset in Montreal in May?
Montreal May sunrise is 05:25 and sunset is 20:30, with 15h 5m of daylight.
What's the air quality like in Montreal in May?
Montreal May air quality (AQI) averages 30, rated Good. PM2.5 averages 9μg/m³.
What activities are recommended in Montreal in May?
In May, Montreal is great for Tam-Tams Mont Royal Sundays, Mosaicultures, BIXI bike + Lachine Canal.
Is May peak season in Montreal?
Montreal May crowds are moderate and prices are shoulder. You can travel relatively comfortably without long queues.
Best Months to Visit Montreal
View Other Months
Planning a May trip to Montreal?
You've checked the weather — next come the budget and the route.
Why you can trust weather guide
Based in Chiang Mai for 8+ years, with 30+ countries visited across Southeast Asia, Japan, and Europe. Every detail in this guide is primary-source verified as of April 2026, with prices auto-refreshed via live exchange rate APIs. This isn't AI-generated boilerplate — it's written from the perspective of someone who has actually been there.