Climate and monthly weather forecast
Chaves, Portugal

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The climate of Chaves

Chaves, a town located in northern Portugal, enjoys a Csb climate under the Köppen climate classification, commonly referred to as Mediterranean, characterized by warm summers. It experiences a complex interplay of temperature patterns, rainfall rates, and humidity throughout the year.

A glance at temperature data reveals an increasing trend from January up to August, with temperatures peaking at around 29.1°C (84.4°F) in August. This peak is followed by a gradual decrease towards the year-end, with December experiencing an average of around 9.8°C (49.6°F). On the other end of the scale, the coldest month tends to be February, with an average low of 1.5°C (34.7°F).

Analyzing the rainfall pattern, November and December receive the highest amount at around 58mm (2.28") and 72mm (2.83") respectively. Conversely, August represents the driest month with rainfall measuring at a minimal 11mm (0.43"). This behavior is typical of Mediterranean climates, marked by winter rainfall and drier summers.

Relative humidity fluctuates over the year between a high of 87% in January and a low down to 56% in August. The peak and nadir of humidity seem to correlate with the wettest and driest months respectively, indicating a link between rainfall and relative humidity in Chaves.

The town seldom experiences snowfall, with only minimal measures of 2mm (0.08") and 5mm (0.2") in January and February respectively. The maximum UV index is around 6 during July, indicating moderate exposure risk, while the lowest is recorded in January and February, at 2, signifying a lower risk of harm from unprotected sun exposure.

The best time to visit Chaves

Based on the climatological data collated, the period between May and September is generally considered the most favorable time to visit Chaves. Temperatures are warm and welcoming, with highs reaching up to 25.5°C (77.9°F) to 29.1°C (84.4°F), and lows comfortably resting at around 8.1°C (46.6°F) to 13.1°C (55.6°F). While rainfall is relatively lower during these months, averaging from 11mm (0.43") to 34mm (1.34"), visitors are advised to be prepared for occasional showers. The sun shines for a long period during these months, averaging between 9.5 hours to 11.5 hours per day, promising ample daylight for outdoor activities and sightseeing.

The worst time to visit Chaves

The least favorable time for a visit to Chaves could be considered the period between November and February. This is primarily due to the colder climate, characterized by lower temperatures that range from a high of 8.9°C (48°F) to 11.5°C (52.7°F) to a low of 1.5°C (34.7°F) to 2.5°C (36.5°F). Additionally, these months experience the highest rainfall of the year, going up to 58mm (2.28") and 72mm (2.83") in November and December respectively. This combination of colder temperatures and relatively heavier precipitation might deter some visitors from making a trip during this period.

Spring weather in Chaves

Spring in Chaves spans March, April, and May, and sees a gradual rise in temperatures. With the highest daily temperatures going from 13.5°C (56.3°F) to 20.4°C (68.7°F) and the lowest nightly temperatures varying between 3.1°C (37.6°F) and 8.1°C (46.6°F), the weather leans towards the milder side. Rainfall shows a concurrent decrease from 43mm (1.69") in March to 34mm (1.34") in May, indicating the shift from wetter winter months to the drier summer period. The spring season is a favorable period to undertake outdoor activities as the town is treated to long daylight hours, stretching from 12 hours in March to 14.5 hours in May.

Summer weather in Chaves

Summer, from June through August, is typically the hottest and the driest period in Chaves. High temperatures peak at around 24.4°C (75.9°F) to 29.1°C (84.4°F), making it ideal for those after a warmer climate. Lows during nights are comfortable, averaging between 10.8°C (51.4°F) to 13.1°C (55.6°F). In this period, the town receives the least amount of rainfall, dropping to 11mm (0.43") in July and August. This weather framework, coupled with the extended daylight hours reaching up to 15.2 hours in June, provides suitable conditions for outdoor activities and exploration.

Autumn weather in Chaves

Autumn months in ChavesSeptember, October, and November — mark the transition from the hot summer months to the colder winter period. September sees a high temperature of 25.5°C (77.9°F), which progressively decreases to 19.2°C (66.6°F) in October and further reduces to 11.5°C (52.7°F) in November. Similar reductions can be seen in the minimum temperatures and daylight hours. Autumn also heralds the return of increased rainfall, beginning with 14mm (0.55") in September, jumping to 50mm (1.97") in October, and culminating in 58mm (2.28") in November. Despite the cooler temperatures and increased rainfall, the fall foliage and fewer tourists make this a pleasant time for a visit.

Winter weather in Chaves

Winter, defined by the months of December, January, and February, brings the chill to Chaves. The average maximum temperatures drop to between 8.9°C (48°F) and 10.3°C (50.5°F), while lows hover at around 1.8°C (35.2°F) to 2.5°C (36.5°F). A hike in rainfall is noticed, with December seeing 72mm (2.83"), the highest throughout the year. With daylight hours down to around 9.5 hours to 10.6 hours, outdoor activities might be limited during this season. Those undeterred by the colder temperatures have the chance to experience a different, more tranquil aspect of Chaves.

Weather in January

Beginning the year, the weather for Chaves, Portugal in January features prevalent cold conditions. Pack warm attire to shield against temperatures that topple to a chilly 1.8°C (35.2°F). Notwithstanding the cold, this month also records high humidity levels at 87%. Weather in January »

Weather in February

Despite the persistence of winter, February offers a slight relief from January's freezing conditions. The mercury records a slight increase, with temperatures varying from 1.5°C (34.7°F) to 10.3°C (50.5°F), making this month a tad warmer than its predecessor. Weather in February »

Weather in March

March in Chaves signals springtime, with discernable upward shifts in temperature. Though cooler temperatures persist, the region begins to thaw from winter's grip, paving way for a moderate climate. Despite the chill, the longer daylight hours of 12 hours provide ample opportunity to enjoy various outdoor activities. Weather in March »

Weather in April

In April, the weather changes appreciably with temperatures fluctuating from 5°C (41°F) to 16°C (60.8°F), thereby creating a pleasant atmosphere. The comforting warmth of the sun invites locals and tourists alike to enjoy outdoor festivities including the Easter celebration. Weather in April »

Weather in May

May marks the beginning of the warm season with average temperatures rising to a pleasing 20.4°C (68.7°F). With lengthening days, the green vistas of Chaves beckon for nature walks, cycling tours, and outdoor picnics. Blossoming landscapes grace the city, augmented by an overall decrease in rainfall to 34mm (1.34") that takes place during the month. Weather in May »

Weather in June

June in Chaves, Portugal, signals the full arrival of summer where average temperatures peak from 24.4°C (75.9°F). The city radiates vibrancy under bountiful sunshine, inspiring a myriad of outdoor activities. The rainfall recedes further to a mere 22mm (0.87") in June, transforming the city's demeanor to be more sunny and inviting. Weather in June »

Weather in July

The hottest month of the year, July in Chaves sees the mercury climbing to an average high of 28.8°C (83.8°F). The low rainfall of just 11mm (0.43") brings about dry conditions, augmenting the heat. Despite this, the summer warmth encourages outdoor pursuits, ranging from rafting on the city's rivers to wine sampling at local vineyards. Weather in July »

Weather in August

With a temperature range from 13.1°C (55.6°F) to 29.1°C (84.4°F), August continues the warm embrace started by July. The city experiences another low rainfall month with just a sprinkle of 11mm (0.43") spread throughout. Chaves teems with summer festivals and events, despite the warm conditions. Weather in August »

Weather in September

September witnesses a subtle cooling trend as compared to August, with thermometers registering a lower high of 25.5°C (77.9°F) on average. The city still basks under predominately sunny conditions but the evenings get cooler. Weather in September »

Weather in October

October in Chaves brings a gradual descent into autumn, with temperatures dipping down to a lower average of 8.6°C (47.5°F). With weather turning cooler, warm clothing becomes essential for both locals and visitors. Although the city faces increased rain with a substantial 50mm (1.97") fall, the seasonal transformation of Chaves is truly a picturesque sight. Weather in October »

Weather in November

Rolling into winter, November experiences a drop in average temperatures to a mere 4.9°C (40.8°F). Walks around Chaves' historic site could require bundling up, given the brisk weather. November also encounters increased precipitation, a sizeable rainfall of 58mm (2.28") to be precise. Weather in November »

Weather in December

Rounding out the year, December in Chaves witnesses further temperature drops, averaging to the lowest of 2.5°C (36.5°F). A stroll through the Christmas-decorated streets could warrant multiple clothing layers as the city settles into winter's rhythm. Weather in December »
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Frequently asked questions

What month is the coldest in Chaves?

January is the coldest month of the year in Chaves, registering average temperatures as high as 8.9°C (48°F) and as low as 1.8°C (35.2°F).

What is the most humid month in Chaves?

The most humid month is January, with an average relative humidity of 87%.

How many days does it rain in Chaves?

Throughout the year, there are 126.9 rainfall days, and 450mm (17.72") of precipitation is accumulated.

When does it snow in Chaves?

January and February are months with snowfall.

How much does it snow in Chaves?

Throughout the year, there are 0.8 snowfall days, and 7mm (0.28") of snow is accumulated.

What is the month with the least sunshine in Chaves?

With an average of 4.4h of sunshine, January has the least sunshine of the year in Chaves, Portugal.

What are the months with the lowest UV index in Chaves?

The months with the lowest UV index in Chaves are January, February, November and December, with an average maximum UV index of 2.

When does it snow the most in Chaves?

The month with the most snowfall in Chaves is February, when snow falls for 0.2 days and typically aggregates up to 5mm (0.2") of snow.

When it does not snow in Chaves?

In Chaves, snow does not fall in March through December.

When are the longest days in Chaves?

June has the longest days of the year, with an average of 15h and 12min of daylight.

What is the driest month in Chaves?

July and August are months with the least rain when the rain falls for 5.5 days and typically aggregates up to 11mm (0.43") of rain.

What month has the most sunshine in Chaves?

With an average of 11.5h of sunshine, July has the most sunshine of the year.

When is the highest UV index in Chaves?

July is the month with the highest UV index, with an average maximum UV index of 6.

What part of the year is the hottest in Chaves?

August is the warmest month, exhibiting average temperatures of 29.1°C (84.4°F) at the peak and 13.1°C (55.6°F) at the base.

What is the least humid month in Chaves?

With an average relative humidity of 56%, August is the least humid month in Chaves.

When is Daylight Saving Time (DST) in Chaves?

On Sunday, 27. October 2024, at 02:00, Daylight Saving Time ends, and the time zone changes from WEST to WET. The next Daylight Saving Time starts on Sunday, 30. March 2025, at 01:00, and the time zone reverts from WET to WEST.

What is the rainiest month in Chaves?

The month with the most rainfall is December, when the rain falls for 12.4 days and typically aggregates up to 72mm (2.83") of precipitation.

What is the month with the shortest days in Chaves?

The month with the shortest days in Chaves, Portugal, is December, with an average of 9h and 12min of daylight.

Average temperature
Chaves, Portugal

Average temperature - Chaves, Portugal

The warmest month (with the highest average high temperature) is August (29.1°C).
The month with the lowest average high temperature is January (8.9°C).

The months with the highest average low temperature are July and August (13.1°C).
The coldest month (with the lowest average low temperature) is February (1.5°C).

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Average pressure
Chaves, Portugal

Average pressure - Chaves, Portugal

The month with the highest atmospheric pressure is December (1022.7mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).

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Average wind speed
Chaves, Portugal

Average wind speed - Chaves, Portugal

The windiest month (with the highest average wind speed) is March (8.3km/h).
The calmest month (with the lowest average wind speed) is September (6.4km/h).

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Average humidity
Chaves, Portugal

Average humidity - Chaves, Portugal

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (56%).

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Average rainfall
Chaves, Portugal

Average rainfall - Chaves, Portugal

The wettest month (with the highest rainfall) is December (72mm).
The driest months (with the least rainfall) are July and August (11mm).

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Average rainfall days
Chaves, Portugal

Average rainfall days - Chaves, Portugal

The month with the highest number of rainy days is April (14.6 days).
The month with the least rainy days is August (3.8 days).

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Average snowfall
Chaves, Portugal

Average snowfall - Chaves, Portugal

The month with the highest snowfall is February (5mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).

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Average snowfall days
Chaves, Portugal

Average snowfall days - Chaves, Portugal

The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Chaves, Portugal

Average daylight / Average sunshine - Chaves, Portugal

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average sunshine days
Chaves, Portugal

Average sunshine days - Chaves, Portugal

The month with the most sunshine days is August (25.5 days).
The month with the least sunshine days is November (13.5 days).

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Average UV index
Chaves, Portugal

Average UV index - Chaves, Portugal

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Chaves, Portugal

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