December scores 88/100 for outdoor ceremonies: very low rain risk (1 wet days, 8mm), 22°C afternoons cooling to about 13°C for the reception, and 10.8 hours of daylight for the photography schedule. September is the month to avoid at 42/100.
December outdoor ceremony score: 88/100
Climate normals for Mexico City 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 | December — 88/100 |
| Second choice | February — 87/100 |
| Month to avoid | September — 42/100 |
| Rain risk in the best month | Very low — rain on about 1 days |
| Guest comfort | 100/100 at 22°C |
| Reception temperature | ≈ 13°C after sunset in December |
| Photo light | 8h of sun across a 10.8h day |
| Months scoring 65+ | 6 of 12 |
December keeps seated guests at 22°C in the afternoon and around 13°C after sunset — the closest Mexico City gets to a ceremony that needs neither shade structures nor patio heaters.
Rain falls on roughly 1 days in December (very low risk, 8mm). A simple marquee-on-standby is usually enough.
December gives 10.8 hours of daylight and about 8 hours of direct sun per day, so a late-afternoon ceremony puts portraits inside golden hour rather than after it.
September scores 42/100 for weddings in Mexico City: 25°C highs, 145mm of rain and 17°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 | 83/100 | Very low (2 days) | 22°C | 12°C | 100/100 | 71/100 |
| February | 87/100 | Very low (1 days) | 22°C | 12°C | 100/100 | 76/100 |
| March | 84/100 | Very low (2 days) | 22°C | 13°C | 100/100 | 73/100 |
| April | 79/100 | Low (4 days) | 23°C | 14°C | 96/100 | 75/100 |
| May | 62/100 | Moderate (8 days) | 24°C | 16°C | 92/100 | 41/100 |
| June | 42/100 | High (21 days) | 25°C | 17°C | 86/100 | 0/100 |
| July | 42/100 | High (26 days) | 25°C | 17°C | 86/100 | 0/100 |
| August | 42/100 | High (24 days) | 25°C | 17°C | 86/100 | 0/100 |
| September | 42/100 | High (23 days) | 25°C | 17°C | 86/100 | 0/100 |
| October | 48/100 | Moderate (12 days) | 24°C | 16°C | 92/100 | 25/100 |
| November | 85/100 | Very low (2 days) | 23°C | 14°C | 96/100 | 78/100 |
| December | 88/100 | Very low (1 days) | 22°C | 13°C | 100/100 | 75/100 |
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 Mexico City 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 Mexico City linked below.
December, at 88/100. It combines very low rain risk with 22°C afternoons and roughly 13°C evenings, which is the most forgiving combination Mexico City offers for seated guests.
September scores 42/100: 25°C highs, 145mm of rain over about 23 days and 17°C evenings make a fully outdoor plan fragile.
In December rain falls on roughly 1 of 30 days, so the single-day probability is about 3%. In September that rises to about 77%.
A marquee on standby is usually enough in December, where rain risk is very low. Outside the 6 months scoring 65 or higher, book real covered space.
December gives 10.8 hours of daylight and about 8 hours of direct sun. Put portraits in the final 60–90 minutes of daylight so they land inside golden hour rather than after it.