Best time to visit Cassis
Re-score for me — drag the dial — every chart recolours live for your heat & sea limits 27°C · sea 29°C
Default 27 °C is the upper edge of the Holiday Climate Index "ideal comfort" band (Scott, Rutty, Amelung & Tang, 2016). Above this, most warm-tourism travellers report measurable discomfort.
Default 29 °C is the Beach Climate Index "bathtub" line (Morgan et al.) — where the sea stops being refreshing and starts feeling like a warm bath.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
Greyed factors are scored normally — extreme heat overrides them, so a clear sky or low rain can't lift the period.
How is this scored? HCI / Steadman / CCI gate — full methodology and citations below.
Compare with another destination
Add as many as you like — stacked below the main strips above. Each row is just the recent-window score strip and (for beach destinations) sea-temperature strip.
Tours in Cassis
6 top-rated tours via Viator. Booking links earn this site a commission at no cost to you. Map locations are approximate (centred on Cassis).
- 1
5-Hour Private Sightseeing Tour of the Provence from Marseille in Luxury Car - 2
Private Marseille Shore excursion Aix en Provence Cassis Tour - 3
E-Mountain Bike Tour Cassis Provence - 4
In Vau la Magnifique - 5
11 HRS Private Tour to ST TROPEZ from MARSEILLE , AIX by lux VAN - 6
Aix-en-Provence & Cassis - VIP Private Tour
Last refreshed 2026-07-30.
Similar climatesNice97% · Monaco97% · Menton97%
Other destinations with the most-alike year-round climate to Cassis (apparent temperature, rain hours, sunshine — matched within the same trip-profile). The ±N chip compares each match's typical score for the current month against Cassis's. Based on the 2020-2024 climatology, not this year's actual weather.
Month-by-month
| Month | Temp °C | Feels °C | Rain days | Rain h | Rain h/day | Humidity | Wind km/h | Sun h | UV | Interest | Score |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan | 5–12 | 9 | 6 | 76 | 12.7 | 67% | 21 | 168 | 1 | Quiet | 7 |
| Feb | 7–15 | 12 | 7 | 75 | 10.7 | 65% | 22 | 177 | 2 | Quiet | 8 |
| Mar | 8–16 | 13 | 5 | 66 | 13.2 | 59% | 22 | 220 | 4 | Moderate | 9 |
| Apr | 10–19 | 16 | 7 | 68 | 9.7 | 52% | 21 | 248 | 5 | Moderate | 9 |
| May | 14–23 | 21 | 8 | 84 | 10.5 | 55% | 20 | 272 | 6 | Busy | 9 |
| Jun | 19–28 | 27 | 6 | 53 | 8.8 | 50% | 21 | 305 | 7 | Peak | 10 |
| Jul | 21–31 | 31 | 1 | 10 | 10.0 | 41% | 21 | 325 | 8 | Peak | 8 |
| Aug | 21–31 | 31 | 3 | 25 | 8.3 | 43% | 20 | 294 | 7 | Peak | 8 |
| Sep | 17–26 | 25 | 8 | 70 | 8.8 | 54% | 21 | 240 | 5 | Moderate | 9 |
| Oct | 14–22 | 21 | 8 | 82 | 10.3 | 63% | 20 | 211 | 3 | Quiet | 9 |
| Nov | 10–17 | 15 | 9 | 79 | 8.8 | 66% | 20 | 166 | 2 | Quiet | 8 |
| Dec | 6–13 | 10 | 8 | 97 | 12.1 | 70% | 21 | 159 | 1 | Quiet | 7 |
UV Index in Cassis by Month
UV index in Cassis peaks at 8 (very high) in July, dropping to 1 (low) in December. July reach very high or extreme levels — apply SPF 50+, wear a hat and protective clothing, and limit direct sun between 11:00 and 17:00.
Best months in detail
June
10/1019–28°C · 6 rain days (53h) · 305 sun hours · 50% humidity · Peak crowd · UV 7 (high) · sunniest 1 in 10 days reach 9 (very high)
September
9/1017–26°C · 8 rain days (70h) · 240 sun hours · 54% humidity · Moderate crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 6 (high)
May
9/1014–23°C (feels 21°C) · 8 rain days (84h) · 272 sun hours · 55% humidity · Busy crowd · UV 6 (high)
Every month
Show the other 9 months in detail
January
7/105–12°C (feels 9°C) · 6 rain days (76h) · 168 sun hours · 67% humidity · Quiet crowd · UV 1 (low)
February
8/107–15°C (feels 12°C) · 7 rain days (75h) · 177 sun hours · 65% humidity · Quiet crowd · UV 2 (low)
March
9/108–16°C (feels 13°C) · 5 rain days (66h) · 220 sun hours · 59% humidity · Moderate crowd · UV 4 (moderate)
April
9/1010–19°C (feels 16°C) · 7 rain days (68h) · 248 sun hours · 52% humidity · Moderate crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)
July
8/1021–31°C · 1 rain days (10h) · 325 sun hours · 41% humidity · Peak crowd · UV 8 (very high)
August
8/1021–31°C · 3 rain days (25h) · 294 sun hours · 43% humidity · Peak crowd · UV 7 (high) · sunniest 1 in 10 days reach 8 (very high)
October
9/1014–22°C · 8 rain days (82h) · 211 sun hours · 63% humidity · Quiet crowd · UV 3 (moderate)
November
8/1010–17°C (feels 15°C) · 9 rain days (79h) · 166 sun hours · 66% humidity · Quiet crowd · UV 2 (low)
December
7/106–13°C (feels 10°C) · 8 rain days (97h) · 159 sun hours · 70% humidity · Quiet crowd · UV 1 (low)
Frequently asked questions about visiting Cassis
When is the best time to visit Cassis?
June is the highest-scoring month (10/10 on the Holiday Climate Index). Typical conditions: 19–28°C (6 rainy days). The top three months by score are June, September, May.
What is the worst time to visit Cassis?
December is the lowest-scoring month (7/10). Typical conditions: 6–13°C (8 rainy days).
Is Cassis too hot in summer?
2 months (July, August) trip the heat deal-breaker in our scoring: apparent temperature crosses the comfort cap, so even with clear skies and low rain the score is held down. Plan around it if heat tolerance is low.
When are crowds lowest in Cassis?
Search-interest seasonality (Google Trends 2021-2025) is lowest in November and peaks in July. Interest tracks both in-trip visitors and lead-time planners, so treat it as a "destination is on people's minds" signal rather than literal arrivals.
Which months in Cassis have good weather but fewer tourists?
March (climate 9/10, crowd index 41) and October (climate 9/10, crowd index 28) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.
What is the UV index in Cassis by month?
UV peaks at 8 (very high) in July and is lowest in December at 1 (low). Monthly peak values: Jan 1, Feb 2, Mar 4, Apr 5, May 6, Jun 7, Jul 8, Aug 7, Sep 5, Oct 3, Nov 2, Dec 1. July reach very high or extreme levels — apply SPF 50+, wear a hat and protective clothing, and limit direct sun between 11:00 and 17:00.
What is the UV index in Cassis in July?
July is the peak UV month in Cassis, with a daily-peak UV index of 8 (very high). At this level, sunburn can occur in under 20 minutes on unprotected fair skin. Apply SPF 50+, wear protective clothing and a hat, and avoid direct midday sun (11:00–17:00).
How high can UV get in Cassis on the sunniest days?
Most days look like the monthly average, but on the sunniest ~1 in 10 days UV climbs higher than the mean suggests. June is the worst case: typical days average UV 7 (high), but the top 10% of days reach UV 9 (very high) — and even higher. Months where the sunniest days routinely exceed the typical reading: April, June, August, September. Plan sun protection for the worst case, not the average.
Is air quality in Cassis bad for travelers?
PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 2 months: January, February. The worst month is February with a typical-day mean of 11 µg/m³ (moderate); on the worst 10% of days PM2.5 reaches 21 µg/m³ (unhealthy for sensitive) and higher. People with asthma, heart conditions, or sensitive children may want to avoid these months or limit outdoor activity. Source: CAMS via Open-Meteo.