Climate and monthly weather forecast
Guia, Portugal

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The climate of Guia

Nestled in Portugal, Guia is known for its Mediterranean, hot summer weather; a characteristic designated by the Köppen climate classification as Csa. This means that the region experiences a dynamic range of weather conditions throughout the year, oscillating between warm, dry summers and mildly cool, adequately damp winters.

The warmer months, from June to August, see a temperature rise from 23.9°C (75°F) to the peak of 27.4°C (81.3°F) in August. Simultaneously, these months are relatively dry witnessing nominal rainfall from 0mm (0") in July to 1mm (0.04") in August. The temperature then starts its descent towards autumn, reaching 22.5°C (72.5°F) by October. Concurrently, rainfall increases progressively between 2mm (0.08") in September and 8mm (0.31") in October.

The cooler weather conditions begin to show themselves in November with the least temperatures recorded from 18.1°C (64.6°F) in November to 15°C (59°F) by December. This period accompanies heavier rainfall, marked by numbers rising from 14mm (0.55") in November to 11mm (0.43") in December. However, relative humidity remains reasonably constant, recording subtle changes throughout the year, with a minimum of 64% in August and reaching a peak of 75% in January, November and December.

A unique pattern observed in Guia is the distinct dry and wet seasons. In the drier months, between June and August, barely few to no rainy days are reported. Contrariwise, the wetter part of the year is particularly recognized with significantly higher rainfall days, between 9 in March to 6.9 in December.

The best time to visit Guia

The sunniest days in Guia are seen between May and August when sunshine hours lie in the range of 11.1 to 11.9 hours per day. Coupled with sea temperatures comfortably lingering from 19°C (66.2°F) to 21°C (69.8°F), this season provides the ideal environment to partake in outdoor activities and water sports. Furthermore, the mild wind speeds at approximately 15.4Kph and clear visibility of 10km (6.2mi) only enhance the visit. Therefore, tourists seeking a memorable time should consider this period as the best time to visit Guia.

The worst time to visit Guia

For visitors sensitive to cooler temperatures and heavy rainfall, the period from November to January might not be the best choice. The average low temperatures recorded are within the range of 13.9°C (57°F) to 10.8°C (51.4°F), and corresponding rainfall increases to a peak of 14mm (0.55") in November. Alongside this, the number of daylight hours available is at the year's low at approximately 9.9 to 10.2 hours per day. These combined factors might limit outdoor activities and dampen the overall visitor experience.

Spring weather in Guia

Spring, nabbing months from March to May, exhibits rising temperatures from 16.7°C (62.1°F) to 21.3°C (70.3°F), while the number of rainfall days decreases from 9 in March to 4.1 in May. It's a season of transition and rejuvenation. The weather during this season offers a fresh perspective, with daylight hours extending from 10.8 to 14.2 hours, and steadily increasing sunshine hours from 6 to 11.1 hours per day.

Summer weather in Guia

The summer season from June to August in Guia provides ample sunbathing opportunities with long daylight hours ranging from 14.7 to 14.4 hours and abundant UV index between 6. The sea temperature during this period ranges comfortably between 19°C (66.2°F) and a mild 21°C (69.8°F). Despite the warmth, the weather remains comfortable due to wind speeds of approximately 15.3Kph to 14.2Kph providing natural cooling.

Autumn weather in Guia

Autumn season sets in around September and continues till November. With a fall in high temperatures from 25°C (77°F) to 18.1°C (64.6°F), autumn experiences increasing rainfall, escalating from 2mm (0.08") to 14mm (0.55") in November. Despite the enhanced humidity and rain, sunshine hours remain appreciable, and wind speeds ensure a comfortable visit.

Winter weather in Guia

Winter commences in December and remains till February, offering cooler temperatures from 15°C (59°F) in December to 15.4°C (59.7°F) by February. Rainfall is quite high in this season going from 11mm (0.43") in December to 7mm (0.28") in February. However, the charm of Guia's winters lies in the relatively warm sea temperatures, even at this time, which ranges from 17°C (62.6°F) in December to 15°C (59°F) in February. Though sunshine hours reduce to between 6.4 to 6.5 hours per day, Guia's winter can be quite a unique experience.

Weather in January

The weather in Guia, Portugal, begins the year with cooler temperatures, noticeable when compared with the warmth of the following months. Although rainfall is common, January sees the city graced with almost 22 sunshine days, providing a respite from the chill. Weather in January »

Weather in February

As the month progresses, the weather in Guia transitions from winter into spring, hinting at the warmth to come with a slight increase in daytime temperatures peaking at 15.4°C (59.7°F) and a decrease in rainfall to 6mm (0.24"). Weather in February »

Weather in March

March heralds the true arrival of Spring, offering a notable difference from the preceding month with an increased number of rainfall days, jumping to 9 from February's 5.1 days. The temperatures continue to rise steadily, making the weather perfect for leisure and outdoor activities. Weather in March »

Weather in April

With temperatures continuing their upward trend, April in Guia enjoys increased sea temperatures and a climb in daylight hours. However, the city also notices an increase in rainfall, similar to March's 11mm (0.43"), indicating frequent yet infrequent showers. Weather in April »

Weather in May

May welcomes the start of the warmer summer months in Guia, Portugal, with highs reaching 21.3°C (70.3°F). An additional single hour of daylight further amplifies the warmth, making the month ideal for sun-loving visitors or locals. Weather in May »

Weather in June

June in Guia unveils its summer at full flare, displaying a significant shift in weather patterns in comparison to May. The weather peaks to its highest temperature recorded so far at 23.9°C (75°F), marking the beginning of true summer heat. Weather in June »

Weather in July

July continues its decadent display of summer with the city of Guia experiencing its hottest weather of the year, reaching up to 26.4°C (79.5°F). A distinct reduction in rain and increased daylight hours all contribute to the typical summer setting. Weather in July »

Weather in August

August in Guia, Portugal, experiences very similar weather conditions to July, making it an equally enjoyable time for summer outdoor activities. A jump to 27.4°C (81.3°F) marks it as the warmest month of the year even though the hours of sunlight begin to decrease slightly. Weather in August »

Weather in September

September provides a gradual respite from the summer heat in Guia, with temperatures starting to cool, falling to 25°C (77°F) from August's peak. Although daylight hours reduce further, the weather remains conducive to outdoor activities with a decrease in the UV index to 6. Weather in September »

Weather in October

October further intensifies the arrival of autumn in Guia, Portugal with an additional decrease in temperature, an increase in rainfall and a noticeable decline in daylight hours. Despite these changes, the UV index stays moderately safe at 5, while the sea temperature begins to cool down to 20°C (68°F). Weather in October »

Weather in November

November ushers in a wintry change with Guia's weather taking a rainier forecast. There's a significant increase in rainfall, jumping to 14mm (0.55") from the previous month's 8mm (0.31"), while the temperature sees an additional decrease. Weather in November »

Weather in December

December marks the end of the year in Guia, Portugal, offering a unique blend of winter chill combined with mild weather patterns. The temperature continues the downward trend, reaching a fairly cool 16.4°C (61.5°F) average. Weather in December »
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Frequently asked questions

What month is the coldest in Guia?

In Guia, January is known for its average lowest temperatures, reaching a high of 15°C (59°F) and a low of 10.8°C (51.4°F).

What is the most humid month in Guia?

The months with the highest humidity are January, March, April and December, with an average relative humidity of 75%.

How many days does it rain in Guia?

Throughout the year, there are 62.4 rainfall days, and 78mm (3.07") of precipitation is accumulated.

What is the month with the least sunshine in Guia?

The month with the least sunshine in Guia is January, with an average of 6h of sunshine.

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

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4.

When is the sea coldest in Guia?

With an average sea temperature of 15°C (59°F), February is the month with the coldest seawater.

When are the longest days in Guia?

With an average of 14h and 42min of daylight, June has the longest days of the year in Guia, Portugal.

What are the months with the highest UV index in Guia?

June through September, with an average maximum UV index of 6, are months with the highest UV index in Guia.

What is the driest month in Guia?

The only month without rainfall in Guia, Portugal, is July.

What month has the most sunshine in Guia?

With an average of 11.9h of sunshine, July has the most sunshine of the year in Guia.

What is the warmest month in Guia?

August tends to be the warmest month, with temperatures averaging a daily high of 27.4°C (81.3°F) and a low of 19.7°C (67.5°F).

What is the least humid month in Guia?

August is the least humid month, with an average relative humidity of 64%.

When does it rain in Guia?

January through June, August through December are months with rainfall in Guia.

What are the months with the warmest sea water in Guia?

August and September, with an average sea temperature of 21°C (69.8°F), are months with the warmest seawater in Guia, Portugal.

When is Daylight Saving Time (DST) in Guia?

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 Guia?

November is the month with the most rainfall. Rain falls for 9.2 days and accumulates 14mm (0.55") of precipitation.

What is the month with the shortest days in Guia?

The month with the shortest days is December, with an average of 9h and 42min of daylight.

Average temperature
Guia, Portugal

Average temperature - Guia, Portugal

The warmest month (with the highest average high temperature) is August (27.4°C).
The month with the lowest average high temperature is January (15°C).

The month with the highest average low temperature is August (19.7°C).
The coldest month (with the lowest average low temperature) is February (10.6°C).

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Average pressure
Guia, Portugal

Average pressure - Guia, Portugal

The month with the highest atmospheric pressure is December (1022.5mbar).
The month with the lowest atmospheric pressure is April (1015.5mbar).

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Average wind speed
Guia, Portugal

Average wind speed - Guia, Portugal

The windiest month (with the highest average wind speed) is February (18.1km/h).
The calmest month (with the lowest average wind speed) is September (12.5km/h).

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Average humidity
Guia, Portugal

Average humidity - Guia, Portugal

The months with the highest relative humidity are January, March, April and December (75%).
The month with the lowest relative humidity is August (64%).

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Average rainfall
Guia, Portugal

Average rainfall - Guia, Portugal

The wettest month (with the highest rainfall) is November (14mm).
The driest month (with the least rainfall) is July (0mm).

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Average rainfall days
Guia, Portugal

Average rainfall days - Guia, Portugal

The month with the highest number of rainy days is November (9.2 days).
The month with the least rainy days is August (0.7 days).

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Average sea temperature
Guia, Portugal

Average sea temperature - Guia, Portugal

The best months for swimming (with the highest average sea temperature) are August and September (21°C).
The coldest month (with the lowest average sea temperature) is February (15°C).

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Average daylight / Average sunshine
Guia, Portugal

Average daylight / Average sunshine - Guia, Portugal

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 6h and 0min).

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Average sunshine days
Guia, Portugal

Average sunshine days - Guia, Portugal

The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is November (19.2 days).

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Average UV index
Guia, Portugal

Average UV index - Guia, Portugal

The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).

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Average visibility
Guia, Portugal

Average visibility - Guia, Portugal

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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Guia, Portugal

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