Saint-Nazaire/Montoir weather by month & the best time to visit
🇫🇷 France · seaside town · oceanic / maritime climate
The best time to visit Saint-Nazaire/Montoir is September — its sunniest month (Sunshine Score 83/100), with June and July close behind. Saint-Nazaire/Montoir averages about 2,144 hours of sunshine a year. Daytime highs around 22°C / 72°F and roughly 43 mm of rain in September.
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- Sun hours / year
- 2,144
- Sunniest month
- September
- Peak score
- 83/100
- Rain / year
- 740 mm
- Midday UV at peak
- 6 (high)
- Sea at warmest
- 22°C / 72°F
- Population
- 67k
- Elevation
- Sea level

When is the best time to visit Saint-Nazaire/Montoir?
For sunshine, the best time to visit Saint-Nazaire/Montoir is September, then June and July. The dullest month is January (6/100, 77 mm of rain). The full month-by-month picture is in the table below.
How sunny is Saint-Nazaire/Montoir?
Saint-Nazaire/Montoir gets a moderate 2,144 hours of sunshine a year. 77 Sunshine Score points separate September (83) from January (6), so the month you pick matters. It ranks #28 of 53 destinations in France for annual sunshine, below the national median of 2,146 hours. The year's 740 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV | Sea |
|---|---|---|---|---|---|---|
| January | 6 | 9° / 48°F | 3° / 37°F | 77 mm | 1 | 9° / 48°F |
| February | 13 | 10° / 50°F | 2° / 36°F | 61 mm | 1 | 10° / 50°F |
| March | 33 | 13° / 55°F | 4° / 39°F | 62 mm | 2 | 11° / 52°F |
| April | 55 | 16° / 61°F | 6° / 43°F | 48 mm | 4 | 13° / 55°F |
| May | 74 | 19° / 66°F | 9° / 48°F | 59 mm | 5 | 17° / 63°F |
| June | 82 | 23° / 73°F | 12° / 54°F | 50 mm | 6 | 19° / 66°F |
| July | 82 | 25° / 77°F | 14° / 57°F | 48 mm | 6 | 20° / 68°F |
| August | 82 | 25° / 77°F | 14° / 57°F | 48 mm | 5 | 22° / 72°F |
| September | 83 | 22° / 72°F | 11° / 52°F | 43 mm | 4 | 19° / 66°F |
| October | 64 | 18° / 64°F | 9° / 48°F | 78 mm | 2 | 16° / 61°F |
| November | 32 | 13° / 55°F | 6° / 43°F | 81 mm | 1 | 13° / 55°F |
| December | 6 | 9° / 48°F | 3° / 37°F | 85 mm | 1 | 10° / 50°F |
Sea temperature in Saint-Nazaire/Montoir by month
The sea off Saint-Nazaire/Montoir is warmest in August at around 22°C / 72°F, and coolest in January at 9°C / 48°F. The water sits at a comfortable 21°C or warmer roughly 1 month a year. Month-by-month sea-surface temperatures are in the Sea column of the table above.
See Saint-Nazaire/Montoir on the interactive sunshine globe →
Nearby places for sunshine
- Nantes France · 45 km · best in Jun · 1,989 h sun/yr
- Rennes France · 90 km · best in Sep · 1,848 h sun/yr
- La Rochelle France · 145 km · best in Jun · 2,187 h sun/yr
- Jersey Jersey · 211 km · best in Jul · 1,930 h sun/yr
- Brest France · 211 km · best in Jul · 1,927 h sun/yr
- Saint Peter Port Guernsey · 238 km · best in Sep · 1,931 h sun/yr
Nearest destinations
- Île d'Yeu France · 68 km · 2,269 h sun/yr · best in Jul
- Lorient/Lann/Bihoué France · 109 km · 2,146 h sun/yr · best in Sep
- Dinard France · 142 km · 1,810 h sun/yr · best in Sep
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