Riga sits at almost 57 degrees north, and at that latitude the year is not organised around temperature but around light. The difference between the shortest and the longest day here is not a nuance: it is eleven hours of sun above the horizon, more than a whole working day lasts in any Mediterranean city.
On 21 December the sun rises at 09:01 and sets at 15:44: six and three quarter hours, most of it low and grey. On 21 June it rises at 04:30 and sets at 22:22, and civil twilight stretches to 23:30, so complete darkness never settles in. These are two different cities, and the same street does not resemble itself in January and in June.
01 A year of two halves
The 1991–2020 averages say it plainly. Riga accumulates 1,879 hours of sunshine a year, but distributed with brutal inequality: 24 hours in December, 37 in January, against 287 in May, 282 in June and 291 in July. In other words, a single summer month concentrates more sunshine than the whole November-to-January quarter.
Rainfall follows the opposite pattern to what most people expect: here summer is the wet season. July is the rainiest month of the year with 79.5 mm, followed by August with 77.9; March, with 34.1 mm, is the driest. The annual figure, 675 mm, is moderate, but it is worth switching off the idea that a Baltic summer is a dry summer.
02 What 17 hours of light means
The practical effect is that the day loses its shape. You have dinner at nine with the sun still high, you go out walking at eleven and there is still enough light to see the colour of the façades, and by half past four in the morning it is daylight again. The city adapts: the canal parks, the Daugava embankment and the terraces in the centre work at hours that would be unthinkable further south.
In June you do not decide what time to head back: you decide when to admit you should have already.
03 The two days it empties
Here is the detail no weather forecast will give you, and it can decide your trip. The 23rd and 24th of June are national holidays in Latvia — Līgo and Jāņi — and the custom is not to celebrate them in the city but to leave it. People head for the countryside, to the family house or someone else's, and the centre of Riga is noticeably empty for two days.
What happens outside the city is a well-documented and very much living solstice tradition: bonfires lit at sunset and kept going until the next morning, wreaths of flowers and herbs for women and of oak leaves for men, Jāņi cheese with caraway, beer, and songs sung all night until sunrise, which here does not mean waiting very long. It is the festival of the year, and it takes place in the countryside.
For a visitor this has two honest readings. If you arrive on those days expecting a city in full swing, you will find closed shops, reduced transport and quiet streets. If you arrive knowing it, you get something hard to repeat: a European capital on its most important weekend of the year, almost to yourself, with light until midnight. Choose deliberately, but choose.
Three moments that explain the Latvian year
Twenty-four hours of sunshine in the whole month. The city is lived indoors.
The solstice, the twilight that never goes out and the two days the city leaves.
23.8 °C and 80 mm of rain: the warmest month is also the rainiest of the year.
04 June or May: the small print
If what you want is sunshine rather than epic, May wins narrowly and it deserves saying. May accumulates 286.7 hours of sunshine against June's 282.2 and collects considerably less water: 47.5 mm versus 65.0. Mean maximums are cooler — 17.8 °C against 21.3 — and the days are already very long: on 1 May the sun sets at 21:06.
June wins in another category: intensity. It is the only month when the night genuinely disappears, the only one with the solstice and with the festival that organises the country's calendar, and the one when the city and its coast run at full capacity. If you are making a single trip to the Baltic, that nuance is worth the extra 17 mm of rain.
05 What June charges you
It is worth being honest about the trade-offs. June collects 65 mm of rain, so rain it does; the Baltic pattern is passing showers rather than full days of water, but you should plan for them. The water in the gulf is still cold early in the month: swimming in June is possible and fairly common, but it is not a warm sea until well into July or August.
And there is the price: June is already season, and the solstice weekend concentrates travel across the whole country, so accommodation and trains are worth looking at in advance. If your priority is spending little, September still gives 167 hours of sunshine at 17.3 °C with fewer people.
Even so, the sum is hard to argue with. June gives you the maximum light of the year, a city that stays outdoors until midnight, the coast half an hour away by train, and the one moment in the calendar when you can see how this country actually works: leaving the capital, for two days, all at once. If the question is when Riga is understood, the answer is the month when it never gets dark.
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