May scores 69/100 for outdoor ceremonies: low rain risk (6 wet days, 74mm), 21°C afternoons cooling to about 15°C for the reception, and 10.2 hours of daylight for the photography schedule. March is the month to avoid at 38/100.
May outdoor ceremony score: 69/100
Climate normals for Buenos Aires rescored on wedding-specific weighting. Once your date falls inside the 14-day window the live forecast on this page takes over.
Last updated: · Live forecast data refreshes hourly.
| Best wedding month | May — 69/100 |
| Second choice | June — 68/100 |
| Month to avoid | March — 38/100 |
| Rain risk in the best month | Low — rain on about 6 days |
| Guest comfort | 97/100 at 21°C |
| Reception temperature | ≈ 15°C after sunset in May |
| Photo light | 6h of sun across a 10.2h day |
| Months scoring 65+ | 2 of 12 |
May keeps seated guests at 21°C in the afternoon and around 15°C after sunset — the closest Buenos Aires gets to a ceremony that needs neither shade structures nor patio heaters.
Rain falls on roughly 6 days in May (low risk, 74mm). A simple marquee-on-standby is usually enough.
May gives 10.2 hours of daylight and about 6 hours of direct sun per day, so a late-afternoon ceremony puts portraits inside golden hour rather than after it.
March scores 38/100 for weddings in Buenos Aires: 28°C highs, 155mm of rain and 22°C evenings make a fully outdoor plan fragile.
Scored on rain risk, guest comfort, evening temperature and photographic light — deliberately different weighting from the travel score.
| Month | Wedding score | Rain risk | Afternoon | Evening | Guest comfort | Photo light |
|---|---|---|---|---|---|---|
| January | 50/100 | Moderate (10 days) | 30°C | 24°C | 66/100 | 72/100 |
| February | 50/100 | Moderate (10 days) | 30°C | 24°C | 66/100 | 71/100 |
| March | 38/100 | Moderate (13 days) | 28°C | 22°C | 75/100 | 16/100 |
| April | 57/100 | Moderate (9 days) | 24°C | 19°C | 92/100 | 20/100 |
| May | 69/100 | Low (6 days) | 21°C | 15°C | 97/100 | 42/100 |
| June | 68/100 | Low (4 days) | 17°C | 12°C | 83/100 | 41/100 |
| July | 63/100 | Low (5 days) | 15°C | 10°C | 76/100 | 59/100 |
| August | 63/100 | Low (5 days) | 15°C | 10°C | 76/100 | 60/100 |
| September | 61/100 | Low (6 days) | 17°C | 12°C | 83/100 | 39/100 |
| October | 56/100 | Moderate (10 days) | 21°C | 15°C | 97/100 | 35/100 |
| November | 58/100 | Moderate (9 days) | 24°C | 19°C | 92/100 | 26/100 |
| December | 58/100 | Moderate (9 days) | 28°C | 22°C | 75/100 | 76/100 |
Wedding weather is scored differently from travel weather: seated guests in formalwear tolerate a narrower band than sightseers, and the ceremony hour matters more than the daily average. Each month in Buenos Aires is scored 0–100 on the weighting below.
| Factor | Weight | What it measures |
|---|---|---|
| Dry conditions | 38% | Share of days with measurable rain — the single factor most likely to force a backup plan. |
| Guest comfort | 27% | Distance from a 22°C daytime ideal, with an extra penalty for humid heat above 24°C. |
| Evening temperature | 20% | Modelled reception-hour temperature against an 18°C ideal for an outdoor evening. |
| Photo light | 15% | Sunshine hours and daylight length, which set the length and quality of the golden hour window. |
Based on long-run climate averages rather than a forecast. Plan the ceremony around the golden hour — see golden hour times for Buenos Aires linked below.
May, at 69/100. It combines low rain risk with 21°C afternoons and roughly 15°C evenings, which is the most forgiving combination Buenos Aires offers for seated guests.
March scores 38/100: 28°C highs, 155mm of rain over about 13 days and 22°C evenings make a fully outdoor plan fragile.
In May rain falls on roughly 6 of 30 days, so the single-day probability is about 20%. In March that rises to about 43%.
A marquee on standby is usually enough in May, where rain risk is low. Outside the 2 months scoring 65 or higher, book real covered space.
May gives 10.2 hours of daylight and about 6 hours of direct sun. Put portraits in the final 60–90 minutes of daylight so they land inside golden hour rather than after it.