The best months to visit Monaco are May, June, September and October, when average highs sit in the comfortable low-to-mid 20s and the sun is generous — June reaches 25.8 °C with 7 rain days and 13.7 hours of sunshine a day, while October settles at 21 °C. July and August are peak season, hottest at 28.9 °C in August and packed with school-holiday crowds and Grand Prix fever. Winter is the quiet low season, cool at 12.4 °C in January but still bright, with 7.3 hours of sun a day.
Best months MayJuneSeptemberOctober
Monaco month by month
Average highs and lows (°C), 2016–2025. Highlighted bars are the best months.
| Month | High | Low | Rain days | Sun / day |
|---|---|---|---|---|
| January | 12.4 °C | 5.3 °C | 6 | 7.3 h |
| February | 13.4 °C | 6.3 °C | 7 | 8.2 h |
| March | 15.1 °C | 7.5 °C | 7 | 9.7 h |
| April | 17.5 °C | 10.3 °C | 8 | 10.9 h |
| May | 20.9 °C | 13.9 °C | 9 | 12 h |
| June | 25.8 °C | 18.9 °C | 7 | 13.7 h |
| July | 28.4 °C | 21.5 °C | 3 | 14.2 h |
| August | 28.9 °C | 21.7 °C | 4 | 12.7 h |
| September | 25.1 °C | 17.9 °C | 7 | 10.9 h |
| October | 21 °C | 14.2 °C | 8 | 8.8 h |
| November | 16.3 °C | 9.4 °C | 9 | 7.5 h |
| December | 13.5 °C | 6.4 °C | 8 | 7.1 h |
How the months are picked.A month qualifies when its average high sits in the comfortable 20–28 °C band (scored down towards 9 °C and 37 °C), rain days are few and sunshine hours are high — at least 78 % of the city's best-scoring month. July and August are then set aside as peak season (school-holiday crowds and prices) whenever at least three other months qualify; where summer is the only comfortable window they stay. Figures are ten-year averages (2016-01-01 to 2025-12-31) from ERA5 reanalysis data via Open-Meteo (CC BY 4.0) for the city centre coordinates.
When to go, and what to expect
Spring (Mar–May)
A lovely time for the coast and gardens before summer heat and crowds arrive.
Summer (Jun–Aug)
Best for beach and nightlife lovers who don't mind heat and crowds; June is the gentler choice.
Autumn (Sep–Nov)
Ideal for warm-sea swimming and sightseeing without peak pressure.
Winter (Dec–Feb)
Good for a mild, low-key city break, though too cool for the beach.
Notable events
- May
- Monaco Grand Prix
- April
- Monte-Carlo Rolex Masters (tennis)
- November
- Fête Nationale (National Day)
- December
- Monte-Carlo Christmas Village
Frequently asked
Is Monaco too hot in August?
August is the hottest month at 28.9 °C, warm but not extreme, and dry with only 4 rain days. The bigger drawback is crowds and peak-season pressure rather than the heat.
What is the rainiest month in Monaco?
Rain days peak at 9 in both May and November. Summer is driest, with just 3 rain days in July and 4 in August.
Is winter worth visiting Monaco?
Winter is quiet and mild rather than cold — highs of 12.4 °C in January and still 7.3 hours of sun a day. It's fine for a low-key city break, but too cool for beach days.
Know when to go? Now decide where to stay — our Monaco area guide →
Areas of Monaco
Best time to visit near here
Sources
- Open-Meteo historical weather API — monthly climate normals, 2016–2025 (CC BY 4.0)
- ERA5 reanalysis (ECMWF / Copernicus) — the underlying temperature, precipitation and sunshine data
- ReasonStay methodology — how the best months are computed and checked
An independent guide to Monaco — honest, verified, no invented data. Climate figures: ERA5 via Open-Meteo, 2016–2025 averages; the best months are computed from them, not opinion.