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This is something you might want to add to your bucket list. August is also the perfect time to visit Finland. The days are long and the temperature is amazing.
Lahti Weather in May
In Lahti, May brings moderate daytime temperatures around 16°C (61°F), with nights cooling to 5°C (41°F). Some rainfall is to be expected.
Rainfall in Lahti in May
Historically, the month has about 11 days of rain, averaging 53 mm (2.1 in) in total. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Lahti in May
Expect highs of 16°C (61°F) in Lahti in May, with nights dropping to around 5°C (41°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights drop to 5°C (41°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.If you prefer enjoying temperate temperatures and rain-free days, June, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Lahti Temperature in May
Min Temperature
5°C (41°F)
Max Temperature
16°C (61°F)
Chance of Rain
37%
Precipitation
53 mm (2.1 in)
Rainy days
11 days
Lahti Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Lahti - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Lahti typically rise from around 12°C (54°F) at the start of May to approximately 17°C (63°F) by the end. Nights are cold, with lows typically ranging from 1°C (34°F) to 7°C (45°F).
Average temperatures in May
Historical weather records for Lahti in May
Browse day-by-day weather records for Lahti spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Lahti historical weather extremes in May
Based on weather observations in Lahti between 1976 and 2026, these are the recorded extremes during May.
- The hottest May day on record in Lahti reached 30°C (86°F) (May 19, 2014).
- The coldest May day was on May 3, 2019, with a maximum of 2°C (36°F).
- Nighttime temperatures dropped to -7°C (19°F) on May 12, 1999, marking the coldest May night on record.
Best Places in Finland in May
Find out more about the weather in Finland and which places have the best travel conditions in this month. See all of Finland in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Lahti in May
For Lahti in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket.
What To Do in Lahti in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling6/10 -
Walking6/10 -
Camping4/10 -
Outdoor sports10/10
Lahti 3-Day Forecast
More climate data for Lahti
See the full Lahti climate overview or explore weather in Finland.
Popular in May
Where to go in May - average daytime high across popular destinations.
Tampere
15°C (59°F) Helsinki
16°C (61°F) Turku16°C (61°F) Vuokatti
13°C (55°F) Rovaniemi12°C (54°F) Äkäslompolo11°C (52°F) Ruka10°C (50°F) Levi10°C (50°F) Bucket list
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