Tallinn Weather in May
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Updated: March 2026
Is May a Good Time to Visit Tallinn?
May is a good time to visit Tallinn (6/10). With 13 daily sunshine hours and only 9 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 2nd sunniest of the year in Tallinn. Culture-focused travellers and those who prefer lighter crowds will find May a practical choice, with prices running lower than peak July without sacrificing all the good weather. June offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Tallinn's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: accommodation is generally available without long lead times, and flight prices are typically lower than peak season. Flexible travellers will find the best deals by booking 2-4 weeks ahead. Mid-week arrivals consistently unlock lower hotel rates than weekend check-ins.
Step off the plane in Tallinn in May and the air meets you at around 15°C, crisp and clear, the kind of chill that sharpens your senses and makes the first coffee taste twice as good. By the time evening arrives and temperatures settle near 6°C, the city takes on a different character entirely. With 13 hours of daylight sun on offer, May gives you the raw material for a genuinely memorable trip.
15°C
Avg High
6°C
Avg Low
9 days
Rain Days
13h
Sunshine
65%
Humidity
Temperature in Tallinn in May
The 9°C day-night temperature range is typical for continental climates: a light jacket in the morning that you shed by midday and need again after sunset. Humidity averages 65%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. UV index averages 10 this month, classed as high to very high. SPF 30+ sunscreen, a brim hat, and sunglasses are not optional between 10am and 4pm. Wind averages 19 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 59°F average high, 43°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature in May
Monthly Precipitation (mm)
What to Wear in Tallinn in May
Packing for Tallinn in May means dressing for 15°C days and 6°C evenings. A mid-weight jacket over a sweater handles 15°C daytime temperatures; the combination stays comfortable all day without overheating. Evening temperatures settle at 6°C, a modest 9°C drop that a light cardigan or denim jacket covers. European cobblestones reward low-profile walking shoes over flip-flops or heels, with cushioned trainers or leather walking shoes being the practical choice. A compact foldable umbrella weighs almost nothing and earns its keep across 9 potential rainy days.
Local tip: Many of Tallinn's museums and galleries maintain cool interior temperatures regardless of outdoor conditions. A compact layer in your daypack lets you move between warm streets and chilled exhibition halls without discomfort.
Events in Tallinn in May
May has no major festivals or public holidays in Tallinn, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
What to Pack for Tallinn in May
Based on 15°C average highs and 9 rainy days
- Warm jacket (down or fleece)
- Merino wool base layer (regulates temperature and resists odour)
- Sweaters and lined trousers
- Scarf and lightweight gloves
- Compact folding umbrella
- Waterproof outer layer or packable rain jacket
- Quick-dry clothing that recovers fast after a shower
- Comfortable walking shoes (a second pair lets the first air out overnight)
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Tallinn in May
- Explore the old town's cobblestone backstreetsMorning (9-11am)At 15°C, conditions are pleasant for unhurried exploration on foot
- Visit hilltop viewpoints for panoramic city viewsLate afternoon (4-6pm)Low sun angle creates dramatic light for photography while temperatures remain comfortable
- Bicycle rental for a half-day city circuitMid-morning startMild 15°C temperatures are ideal for extended cycling without excessive effort
- Boat tour of the river, bay, or canal networkLate morning departureComfortable weather makes open-deck boats viable without wind-chill concerns
- Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
- Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
- Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningMay brings distinct seasonal changes to public green spaces worth exploring
- Warm up with traditional hot dishes: local stew, fondue, or braised specialities at a neighbourhood restaurantLunch (12-2pm) or dinner (7-9pm)Cold-weather cuisine is a genuine cultural experience and the best local restaurants serve their heartiest dishes in cooler months
Why is Tallinn mild in May?
May marks the transition into warmer conditions in Tallinn, as the sun angle climbs and day length extends. Temperatures averaging 15°C by day and 6°C overnight reflect a city shaking off winter: the morning air still carries a cool edge, but afternoons are noticeably warmer than even four weeks prior. At 59 degrees north latitude, spring is one of the most dynamic periods in the annual cycle, with weekly temperature changes that can be larger than the month-to-month shifts of summer. This volatility is part of the appeal: Tallinn in May has a freshness and energy that peak-summer heat tends to mute. Layers remain essential, but there are reliable pockets of warmth that reward patience. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate -- wear sunscreen. UV 6-7: High -- hat and SPF 30+ essential. UV 8-10: Very High -- limit midday exposure. UV 11+: Extreme -- seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry -- skin and throat may feel parched. 40-60%: Comfortable -- ideal for most people. 60-80%: Sticky -- light, breathable fabrics recommended. Above 80%: Muggy -- heat feels more intense; quick-dry clothing is essential.
Frequently Asked Questions: Tallinn in May
May ranks 2nd sunniest of the year in Tallinn, with an average 13 daily sunshine hours. The driest months are February, March, and April. July is the hottest month (21°C avg high); February is the coolest (-2°C). From here, temperatures rise 4°C into June. Compared to last month (April: 9°C high, 9 rain days), May is warmer and equally dry. May is among the top three sunniest months to visit Tallinn.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | -1°C | -5°C | 11 | 2h | View |
| February | -2°C | -7°C | 9 | 4h | View |
| March | 2°C | -4°C | 9 | 7h | View |
| April | 9°C | 1°C | 9 | 10h | View |
| May | 15°C | 6°C | 9 | 13h | View |
| June | 19°C | 11°C | 11 | 13h | View |
| July | 21°C | 14°C | 12 | 14h | View |
| August | 20°C | 14°C | 14 | 12h | View |
| September | 15°C | 10°C | 12 | 9h | View |
| October | 9°C | 5°C | 13 | 5h | View |
| November | 4°C | 0°C | 11 | 2h | View |
| December | 1°C | -3°C | 12 | 1h | View |
Plan Your Trip to Tallinn
Nearby Destinations with Similar Weather
These cities are within 500 km and experience broadly comparable weather conditions during the same calendar month, making them practical standalone alternatives or worthwhile additions to a longer regional itinerary.
Data Sources for Tallinn
Climate normals represent 30-year averages (1991-2020). Individual years may vary.