Best time to visit Saint-Malo

Re-score for me — drag the dial — every chart recolours live for your heat & sea limits 27°C · sea 29°C
I'm comfortable up to 27°C feels-like
22° heat-averse 30° heat-loving

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.

Sea feels bathtub at 29°C
26° strict 31° tolerant

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.

Saved to this browser. Changes update the strips below.
Sea temp cold <18° chilly 18–21° ideal 22–26° warm 27–28° bathtub 29–30° too warm ≥31°
Recent · 2020-2024
Interest Google Trends 2021-2025 searches, not arrivals (?)
Sea Nov 2022 – Dec 2024 (?)
Day · avg daily high (?)
Night · avg overnight low (?)
UV index · On a typical day around midday, UV is about this (?)
113456654211
On the sunniest 1 in 10 days, UV reaches this — and even higher
47773
PM2.5 air quality · on a typical day (?)
899877566679
On the worst 1 in 10 days, PM2.5 reaches this — and even higher
1718151312127811101316
August 8/10 feels 21°C · HCI 76/100
Day 21° · Night 17° 72% humidity 24 km/h wind 11 rain days (122h) 254h sun sea 20°C
Thermal 8
Sky 8
Rain 7
Wind 9

Higher = better, including rain & wind (green = "doesn't hurt the score", not "lots of it").

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.

Similar climatesDeauville95% · Ostend94% · Brighton93%

Other destinations with the most-alike year-round climate to Saint-Malo (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 Saint-Malo'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 5–9 5 16 179 11.2 81% 28 107 1 Quiet 5
Feb 6–11 7 12 140 11.7 78% 30 113 1 Quiet 5
Mar 7–12 8 16 159 9.9 74% 28 184 3 Quiet 6
Apr 8–14 11 10 108 10.8 71% 26 230 4 Quiet 7
May 11–16 14 12 128 10.7 71% 26 270 5 Quiet 7
Jun 14–19 18 12 142 11.8 74% 23 270 6 Quiet 7
Jul 16–21 19 10 128 12.8 72% 25 273 6 Quiet 8
Aug 17–21 21 11 122 11.1 72% 24 254 5 Peak 8
Sep 15–20 19 12 136 11.3 73% 24 207 4 Quiet 7
Oct 12–17 15 15 161 10.7 77% 28 166 2 Quiet 6
Nov 9–13 10 14 171 12.2 79% 30 118 1 Peak 5
Dec 7–10 6 17 209 12.3 82% 31 92 1 Quiet 4

UV Index in Saint-Malo by Month

UV index in Saint-Malo peaks at 6 (high) in June, dropping to 1 (low) in January. June have high UV — SPF 30+ and sunglasses recommended.

Best months in detail

August

8/10

17–21°C · 11 rain days (122h) · 254 sun hours · 72% humidity · Peak crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)

July

8/10

16–21°C (feels 19°C) · 10 rain days (128h) · 273 sun hours · 72% humidity · Quiet crowd · UV 6 (moderate) · sunniest 1 in 10 days reach 7 (high)

April

7/10

8–14°C (feels 11°C) · 10 rain days (108h) · 230 sun hours · 71% humidity · Quiet crowd · UV 4 (moderate)

Every month

Show the other 9 months in detail

January

5/10

5–9°C (feels 5°C) · 16 rain days (179h) · 107 sun hours · 81% humidity · Quiet crowd · UV 1 (low)

February

5/10

6–11°C (feels 7°C) · 12 rain days (140h) · 113 sun hours · 78% humidity · Quiet crowd · UV 1 (low)

March

6/10

7–12°C (feels 8°C) · 16 rain days (159h) · 184 sun hours · 74% humidity · Quiet crowd · UV 3 (low) · sunniest 1 in 10 days reach 4 (moderate)

May

7/10

11–16°C (feels 14°C) · 12 rain days (128h) · 270 sun hours · 71% humidity · Quiet crowd · UV 5 (moderate) · sunniest 1 in 10 days reach 7 (high)

June

7/10

14–19°C (feels 18°C) · 12 rain days (142h) · 270 sun hours · 74% humidity · Quiet crowd · UV 6 (high)

September

7/10

15–20°C (feels 19°C) · 12 rain days (136h) · 207 sun hours · 73% humidity · Quiet crowd · UV 4 (moderate)

October

6/10

12–17°C (feels 15°C) · 15 rain days (161h) · 166 sun hours · 77% humidity · Quiet crowd · UV 2 (low) · sunniest 1 in 10 days reach 3 (moderate)

November

5/10

9–13°C (feels 10°C) · 14 rain days (171h) · 118 sun hours · 79% humidity · Peak crowd · UV 1 (low)

December

4/10

7–10°C (feels 6°C) · 17 rain days (209h) · 92 sun hours · 82% humidity · Quiet crowd · UV 1 (low)

Frequently asked questions about visiting Saint-Malo

When is the best time to visit Saint-Malo?

August is the highest-scoring month (8/10 on the Holiday Climate Index). Typical conditions: 17–21°C (11 rainy days). The top three months by score are August, July, April.

What is the worst time to visit Saint-Malo?

December is the lowest-scoring month (4/10). Typical conditions: 7–10°C (17 rainy days).

When are crowds lowest in Saint-Malo?

Search-interest seasonality (Google Trends 2021-2025) is lowest in February and peaks in November. 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 Saint-Malo have good weather but fewer tourists?

July (climate 8/10, crowd index 0) and April (climate 7/10, crowd index 0) — shoulder months with above-average climate and below-median search-interest. Often the best value-for-weather trade.

What is the UV index in Saint-Malo by month?

UV peaks at 6 (high) in June and is lowest in January at 1 (low). Monthly peak values: Jan 1, Feb 1, Mar 3, Apr 4, May 5, Jun 6, Jul 6, Aug 5, Sep 4, Oct 2, Nov 1, Dec 1.

What is the UV index in Saint-Malo in June?

June is the peak UV month in Saint-Malo, with a daily-peak UV index of 6 (high). Apply SPF 30+, wear sunglasses, and seek shade during midday hours.

How high can UV get in Saint-Malo 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. July is the worst case: typical days average UV 6 (moderate), but the top 10% of days reach UV 7 (high) — and even higher. Months where the sunniest days routinely exceed the typical reading: March, May, July, August, October. Plan sun protection for the worst case, not the average.

Is air quality in Saint-Malo bad for travelers?

PM2.5 (fine-particle pollution) exceeds the WHO sensitive-group guideline (15 µg/m³) in 4 months: January, February, March, December. The worst month is February with a typical-day mean of 9 µg/m³ (fair); on the worst 10% of days PM2.5 reaches 18 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.