Sucre month by month, at a glance
Hover each month for the summary. Click to pin it.
There are destinations where the question of when to go is answered with a thermometer. Not here: the year's lowest average high is 20.7 degrees and the highest is 23.2. Two and a half degrees between the coolest month and the warmest, and that is the whole range.
01 A twelve-month spring
The city sits at about 2,750 metres in a sheltered valley, and that combination of altitude and tropical latitude produces what people here call permanent spring. The figures confirm it: highs between 20.7 and 23.2 degrees all year round.
Where there is variation is at night. Average minimums run from 10.6 degrees in January to 4.1 in July, so the southern winter brings cold early mornings even though the afternoons stay mild. It is the daily range, not the seasonal one, that rules.
The practical consequence for packing is simple: whatever the month, bring layers. A T-shirt at three in the afternoon and a coat at seven is the year-round rule.
Key moments at a glance
5.2 millimetres in the whole month and afternoons of 21.7 degrees.
1.5 millimetres of rain, but mornings at 4.5 degrees.
Highs of 22.6 degrees, mild nights and still little rain.
148 millimetres: the wettest month of the year by some distance.
02 The only thing that changes is the rain
The year splits into two very clear halves. From December to March almost all the water falls: January adds 148 millimetres, December 106 and February 120. From May to September, by contrast, rain practically disappears, with June at 1.5 millimetres and July at 3.3.
Rain in the wet season is not usually all-day. These are afternoon storms that build over the hills and unload in a couple of hours, with mornings that almost always start clear.
That makes the wet half perfectly workable if you plan the day for the morning. What you should not do is leave for the afternoon an outing that depends on dirt tracks, which get complicated with water.
03 The dry season and its two faces
From May to September the sky stays clear week after week. It is the season of most light, the best for seeing the white city at its finest, and the only one with guarantees for any outdoor plan.
The trade-off is night temperatures and dust. In June and July early mornings hover around four degrees, many old buildings have no heating, and the countryside around turns brown and dry.
If you had to pick one month within that half, it would be September: rain is still scarce at 26.5 millimetres, nights no longer drop below seven degrees and the landscape begins to regain colour.
04 The altitude, which here is manageable
It is worth saying because many people ask: at 2,750 metres the altitude is noticeable, but far less than in other cities in the country above 3,600. Most travellers adapt in a day or two.
That is why this city works well as a first stop to acclimatise before going higher. Arriving here, staying a few days and then continuing to higher ground is a sensible sequence.
What you should do is take it gently for the first forty-eight hours: walk the slopes of the old town slowly, drink water and leave any strenuous outing for the third day.
Here you do not pick the month by the thermometer: you pick it by how many afternoons you will have an open sky.
05 How to choose
If you want meteorological certainty, go between May and September, and within that range aim for September for the milder nights. If you do not mind getting wet some afternoons and prefer a green landscape, the December to March window gives you the city with fewer people.
And in any case, bring layers. It is the only recommendation that holds all twelve months in a city where the gap between afternoon and dawn can be fifteen degrees.
