Climate and monthly weather forecastChaves, Portugal

Climate and monthly weather forecast

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 Chaves — September, 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 »

Updated: Feb 2, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

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).

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

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

January and February are months with snowfall.

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

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

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

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.

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

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

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.

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

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

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.

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

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.

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

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Average temperature
Chaves, Portugal

Average high temperature in January:
8.9°C
Average high temperature in February:
10.3°C
Average high temperature in March:
13.5°C
Average high temperature in April:
16°C
Average high temperature in May:
20.4°C
Average high temperature in June:
24.4°C

Average high temperature in July:
28.8°C
Average high temperature in August:
29.1°C
Average high temperature in September:
25.5°C
Average high temperature in October:
19.2°C
Average high temperature in November:
11.5°C
Average high temperature in December:
9.8°C

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).

Average low temperature in January:
1.8°C
Average low temperature in February:
1.5°C
Average low temperature in March:
3.1°C
Average low temperature in April:
5°C
Average low temperature in May:
8.1°C
Average low temperature in June:
10.8°C

Average low temperature in July:
13.1°C
Average low temperature in August:
13.1°C
Average low temperature in September:
11.4°C
Average low temperature in October:
8.6°C
Average low temperature in November:
4.9°C
Average low temperature in December:
2.5°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).

Average pressure
Chaves, Portugal

Average pressure in January:
1021.9mbar
Average pressure in February:
1019.9mbar
Average pressure in March:
1017.7mbar
Average pressure in April:
1015.3mbar
Average pressure in May:
1016.7mbar
Average pressure in June:
1017mbar

Average pressure in July:
1017.2mbar
Average pressure in August:
1017.2mbar
Average pressure in September:
1017.7mbar
Average pressure in October:
1016.5mbar
Average pressure in November:
1017.2mbar
Average pressure in December:
1022.7mbar

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

Average wind speed
Chaves, Portugal

Average wind speed in July:
7.3km/h
Average wind speed in August:
7.1km/h
Average wind speed in September:
6.4km/h
Average wind speed in October:
6.5km/h
Average wind speed in November:
7.7km/h
Average wind speed in December:
6.7km/h

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).

Average humidity
Chaves, Portugal

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

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).

Average rainfall days
Chaves, Portugal

Average rainfall days in January:
13.9 days
Average rainfall days in February:
10.9 days
Average rainfall days in March:
13.3 days
Average rainfall days in April:
14.6 days
Average rainfall days in May:
12 days
Average rainfall days in June:
9.3 days

Average rainfall days in July:
5.5 days
Average rainfall days in August:
3.8 days
Average rainfall days in September:
5.9 days
Average rainfall days in October:
10.8 days
Average rainfall days in November:
14.5 days
Average rainfall days in December:
12.4 days

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).

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).

Average snowfall days
Chaves, Portugal

Average snowfall days in January:
0.3 days
Average snowfall days in February:
0.2 days
Average snowfall days in March:
0.1 days
Average snowfall days in April:
0 days
Average snowfall days in May:
0 days
Average snowfall days in June:
0 days

Average snowfall days in July:
0 days
Average snowfall days in August:
0 days
Average snowfall days in September:
0 days
Average snowfall days in October:
0 days
Average snowfall days in November:
0.1 days
Average snowfall days in December:
0.1 days

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).

Average daylight / Average sunshine
Chaves, Portugal

Average daylight in January:
9h and 36min
Average daylight in February:
10h and 36min
Average daylight in March:
12h and 0min
Average daylight in April:
13h and 24min
Average daylight in May:
14h and 36min
Average daylight in June:
15h and 12min

Average daylight in July:
14h and 54min
Average daylight in August:
13h and 48min
Average daylight in September:
12h and 30min
Average daylight in October:
11h and 6min
Average daylight in November:
9h and 54min
Average daylight in December:
9h and 12min

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).

Average sunshine in January:
4h and 24min
Average sunshine in February:
5h and 48min
Average sunshine in March:
7h and 12min
Average sunshine in April:
8h and 6min
Average sunshine in May:
9h and 30min
Average sunshine in June:
10h and 36min

Average sunshine in July:
11h and 30min
Average sunshine in August:
11h and 24min
Average sunshine in September:
9h and 30min
Average sunshine in October:
6h and 18min
Average sunshine in November:
4h and 48min
Average sunshine in December:
5h and 0min

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).

Average sunshine days
Chaves, Portugal

Average sunshine days in January:
15.3 days
Average sunshine days in February:
15.8 days
Average sunshine days in March:
16.5 days
Average sunshine days in April:
13.6 days
Average sunshine days in May:
17.3 days
Average sunshine days in June:
18.6 days

Average sunshine days in July:
24.2 days
Average sunshine days in August:
25.5 days
Average sunshine days in September:
22 days
Average sunshine days in October:
18.9 days
Average sunshine days in November:
13.5 days
Average sunshine days in December:
17.1 days

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

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).