Tallinn Weather in May

In May, Tallinn averages a high of 15°C (60°F) and a low of 5°C (41°F), from 56 years of daily records (1971–2026).

15°C

Average high

60°F

5°C

Average low

41°F

31°C

Record high

89°F · May 19, 2014

-5°C

Record low

23°F · May 12, 1999

What May Is Like in Tallinn

May is the least predictable month in Tallinn: daytime highs vary more from day to day and year to year than in any other month.
On average, 2.3 nights in May drop below freezing.
May in Tallinn has become 0.6°C (1.0°F) warmer on average: the 2012–2026 average against 1970–1989.
The warmest May in the record was 2018; the coldest was 1974.

At least 1 mm of rain falls on 22% of May days, and the month averages 36 mm in total.

Average daytime high in Tallinn, every May since 1971

Warmest: 2018 (20.1°C)Latest: 2026 (15.9°C)10-year averageLong-run average (15.3°C)

See the weather in Tallinn on any May date, year by year.

Source: NOAA GHCN-Daily, Tallinn (1971–2026). Averages cover 1971–2026. How we compute this