Climate and monthly weather forecast
Monte Carlo, Monaco

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A large fountain of water geysers in front of the Monte Carlo Casino in Monte Carlo, Monaco
A large fountain of water geysers in front of the Monte Carlo Casino in Monte Carlo, Monaco

The climate of Monte Carlo

A crowning jewel nestled on the French Riviera, Monte Carlo in Monaco basks in the splendour of a Mediterranean, warm summer climate, as classified by the Köppen climate system under the Csb category. This classification unmistakably depicts Monte Carlo's year-round moderate temperatures and high levels of humidity, setting the scene for a constituent warm climate.

Analyzing the climatological data provided substantiates this classification. Throughout the year, the average high temperature fluctuates modestly, moving from 12.5°C (54.5°F) in January up to a peak of 26.6°C (79.9°F) in August, and then gradually tapering off to 13.5°C (56.3°F) by December. Concurrently, the average low temperature also exhibits a gentle rise and fall existing within a range from 4.9°C (40.8°F) to 19.3°C (66.7°F).

Rainfall frequencies in Monte Carlo present a distinct pattern. Starting from a high of 83mm (3.27") in January, rainfall steadily decreases until July, where it reaches its minimum at 16mm (0.63"). Following this, rain levels rise again, peaking at 108mm (4.25") in October before declining once more towards the end of the year. As expected for a coastal city, the sea temperature follows a similar pattern of the air temperature, fluctuating from 13.1°C (55.6°F) to 23.7°C (74.7°F) over the year.

The best time to visit Monte Carlo

Considering the weather elements, the sweet spot for exploration in Monte Carlo falls between May and September. During this period, tourists can enjoy pleasantly warm air temperatures ranging from 19.8°C (67.6°F) to 26.6°C (79.9°F). Sea temperatures also become agreeable for aquatic activities, sitting comfortably between 18°C (64.4°F) and 23.7°C (74.7°F). Additionally, the city receives maximum daylight hours of up to 15.4 hours in June and the least rainfall, with July being the driest month holding just 16mm (0.63") of rain.

The worst time to visit Monte Carlo

While Monte Carlo offers charm in every season, the period from November to February experiences lower temperatures, ranging from 12.5°C (54.5°F) to 16.2°C (61.2°F), and higher rainfall with November bringing in a substantial 104mm (4.09") downpour. During these months, the sea temperature also falls below 18°C (64.4°F), making it less suitable for water sports or beach activities.

Spring weather in Monte Carlo

Monte Carlo's spring spans from March to May bringing promise of warming air temperatures. Rising from an average high of 14.5°C (58.1°F) in March to 19.8°C (67.6°F) in May, these months pave the way for outdoor enjoyment. Meanwhile, the evenings continue to offer a cool contrast with temperatures from 7.2°C (45°F) to 13°C (55.4°F). The sea temperature experiences a modest increase from 13.4°C (56.1°F) to 18°C (64.4°F), catering to the adventurous.

Summer weather in Monte Carlo

Humming with action, summers in Monte Carlo traverse June to August. The season embraces the highest average temperatures, soaring from 23.3°C (73.9°F) in June to 26.6°C (79.9°F) in August. Meanwhile, evenings cool off lightly, with temperatures ranging from 16.4°C (61.5°F) to 19.3°C (66.7°F). June also sees the longest day in the year, bathing the city in a generous 15.4 hours of daylight.

Autumn weather in Monte Carlo

Autumn proves equally pleasant in Monte Carlo, extending from September to November. Average high temperatures regress from the summer peak of 24.2°C (75.6°F) in September to 16.2°C (61.2°F) by November. The evenings develop a brisk chill, with temperatures declining from 16.9°C (62.4°F) to 8.6°C (47.5°F). Despite these changes, the sea remains relatively warm varying from 22.3°C (72.1°F) to 17.4°C (63.3°F), providing ample delight for water enthusiasts.

Winter weather in Monte Carlo

Winters in Monte Carlo, spanning December to February, carry a unique charm. The average high temperature dips to reach a yearly low of 12.5°C (54.5°F) by January while evening temperatures can drop as low as 4.9°C (40.8°F) by January. As the coldest season, it is also the rainiest with the highest rainfall seen in these months, peaking at 83mm (3.27") in January. Simultaneously, the sea cools down to 13.5°C (56.3°F) in December and lowers further to 13.1°C (55.6°F) by February.

Weather in January

Monte Carlo, Monaco, greets the new year with generally mild and wet conditions. Notably, January is characterized by the lowest amount of daylight in the year, clocking in at a mere 9.4 hours. The city experiences frequent precipitation, leading to saturated soil and a generally damp atmosphere. Weather in January »

Weather in February

In February, Monte Carlo ushers in a marginal increase in climatic conditions. The city begins to bid goodbye to the winter chill as the sunshine duration mildly increases to 5.5 hours. The frequency of rainfall tends to decline, leading to drier paths and less gloomy skies. Weather in February »

Weather in March

Transitioning from winter to spring, Monte Carlo in March possesses an improved climate. March sees a spring in its step with a noticeable jump in temperature highs. The temperature range shifts from 12.5°C (54.5°F) to 14.5°C (58.1°F) month-to-month. Weather in March »

Weather in April

April showers ring true for Monte Carlo, albeit with mild intensity. It is crucial to note the sea temperature enhancement which allows it to jump from 13.4°C (56.1°F) in March to 14.7°C (58.5°F) in April. The rainfall, more scattered now, lends a special charm to the city's lush gardens and flora. Weather in April »

Weather in May

With May, Monte Carlo embraces peak spring with brighter, longer days. The city experiences its first taste of the approaching summer as the number of rainfall days drop to 5.2, ushering in clear skies. With improved climatic conditions, the city becomes preferable for a plethora of activities such as court-side spectating at the Monaco Grand Prix. Weather in May »

Weather in June

June marks the official onset of summer in Monte Carlo. A dip in rainfall to 37mm (1.46") indicates a drier atmosphere and sunnier days. June incorporates an increase in sunshine duration leading to perfect conditions for taking a dip in the azure waters. Weather in June »

Weather in July

In July, Monte Carlo is comfortably nestled in mid-summer warmth. The city records its highest temperature highs for that year, touching a balmy 26.4°C (79.5°F). The summer heat is undeniably intense but moderated by coastal breezes, resulting in warm yet bearable conditions. Weather in July »

Weather in August

August signals the waning phase of summer in Monte Carlo with only slight climate fluctuations. Remarkably, the city pushes through August with the highest sea temperatures registered at 23.7°C (74.7°F). Outdoor activities remain in full swing and beach days are common. Weather in August »

Weather in September

September in Monte Carlo embodies the essence of early autumn. Despite a slight dip in temperature and a marginal increase in rainfall from August to September, conditions remain comfortably warm. The return of increased rainfall revitalizes the city's foliage and contrasting blue skies make the city incredibly picturesque. Weather in September »

Weather in October

October in Monte Carlo represents full-fledged autumn with notable climate changes. A striking feature of this month is the substantial increase in rainfall from 54mm (2.13") in September to 108mm (4.25") in October. The city witnesses cooler days and crisp nights, requiring the inhabitants to start transitioning their clothes from light fabrics to slightly warmer layers. Weather in October »

Weather in November

November brings a notable chill to Monte Carlo's climate. However, the UV Index showing a drop from 3 in October to 2 in November stands out the most in terms of climate data. The onset of winter barely hampers the outdoor activities, making the city a year-round destination. Weather in November »

Weather in December

Concluding the year, December in Monte Carlo comes with a winter chill. The temperatures drop further with the UV Index reaching its annual low of 1. The gloves, thick coats and woolen hats make their appearance in December’s fashion scene. Weather in December »
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Frequently asked questions

What are the coldest months in Monte Carlo?

In Monte Carlo, Monaco, the average lowest temperatures are observed in January, with a high of 12.5°C (54.5°F) and a low of 4.9°C (40.8°F).

How many days does it rain in Monte Carlo?

In Monte Carlo, during the entire year, the rain falls for 62.7 days and collects up to 769mm (30.28") of precipitation.

When is the lowest UV index in Monte Carlo?

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Monte Carlo, Monaco.

What is the month with the coldest sea water in Monte Carlo?

With an average sea temperature of 13.1°C (55.6°F), February is the month with the coldest seawater in Monte Carlo.

When are the longest days in Monte Carlo?

June has the longest days of the year in Monte Carlo, Monaco, with an average of 15h and 24min of daylight.

When is the highest UV index in Monte Carlo?

June and July, with an average maximum UV index of 8, are months with the highest UV index in Monte Carlo, Monaco.

What is the driest month in Monte Carlo?

The month with the least rainfall is July, when the rain falls for 1.9 days and typically collects 16mm (0.63") of precipitation.

What month has the most sunshine in Monte Carlo?

With an average of 11h of sunshine, July has the most sunshine of the year in Monte Carlo.

What is the hottest time of year in Monte Carlo?

Monte Carlo's August weather reaches an average high of 26.6°C (79.9°F) and an average low of 19.3°C (66.7°F), making it the warmest month.

When is the sea warmest in Monte Carlo?

With an average sea temperature of 23.7°C (74.7°F), August is the month with the warmest seawater in Monte Carlo, Monaco.

What is the wettest month in Monte Carlo?

The month with the most rainfall in Monte Carlo is October, when the rain falls for 5.8 days and typically aggregates up to 108mm (4.25") of precipitation.

When is Daylight Saving Time (DST) in Monte Carlo?

On Sunday, 27. October 2024, at 03:00, Daylight Saving Time ends in Monte Carlo, Monaco, and the time zone changes from CEST to CET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 02:00, and the time zone reverts from CET to CEST.

What is the month with the shortest days in Monte Carlo?

With an average of 9h and 0min of daylight, December has the shortest days of the year in Monte Carlo, Monaco.

What is the month with the least sunshine in Monte Carlo?

December has the least sunshine of the year in Monte Carlo, Monaco, with an average of 4.6h of sunshine.

Average temperature
Monte Carlo, Monaco

Average temperature - Monte Carlo, Monaco

The warmest month (with the highest average high temperature) is August (26.6°C).
The month with the lowest average high temperature is January (12.5°C).

The months with the highest average low temperature are July and August (19.3°C).
The coldest month (with the lowest average low temperature) is January (4.9°C).

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Average rainfall
Monte Carlo, Monaco

Average rainfall - Monte Carlo, Monaco

The wettest month (with the highest rainfall) is October (108.2mm).
The driest month (with the least rainfall) is July (15.6mm).

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Average rainfall days
Monte Carlo, Monaco

Average rainfall days - Monte Carlo, Monaco

The month with the highest number of rainy days is November (7 days).
The month with the least rainy days is July (1.9 days).

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Average sea temperature
Monte Carlo, Monaco

Average sea temperature - Monte Carlo, Monaco

The best month for swimming (with the highest average sea temperature) is August (23.7°C).
The coldest month (with the lowest average sea temperature) is February (13.1°C).

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Average daylight / Average sunshine
Monte Carlo, Monaco

Average daylight / Average sunshine - Monte Carlo, Monaco

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).

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Monte Carlo, Monaco

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