Climate and monthly weather forecastSantarem, Portugal
Climate and monthly weather forecast
The climate of Santarem
Santarem, Portugal, finds itself classified under the Mediterranean hot summer climate, precisely the Csa classification, according to the Köppen climate classification. Its geographical position between the Atlantic ocean and the Iberian interior contributes to a distinct set of climatological parameters, spanning a cyclical pattern of variations from month to month.Throughout the year, average high temperatures range from 14°C (57.2°F) in winter to a peak of 31°C (87.8°F) in summer, while low temperatures vary from 6.8°C (44.2°F) to 15.8°C (60.4°F), encapsulating the Mediterranean essence of mild winters and hot summers. Relative humidity manifests a similar pattern; starting the year at its highest at 81%, it gradually decreases to reach a summer low of 62%, only to rise again towards the end of the year.
Rainfall in Santarem is moderate to high during winter months peaking at 53mm (2.09") in November and very low during summer — a mere 3mm (0.12") from July to August, characteristic of the Mediterranean style wet winters and dry summers. Sunshine is abundant; however, the number of sunny days is at its best from June to August, reaching up to around 27 days. Interestingly, wind speeds exhibit almost a steady pattern the whole year, lingering at an average of 12km/h (7.5mph).
The best time to visit Santarem
Certainly, the prime time to visit Santarem is from June to August. During these summer months, the weather is at its warmest — high temperatures range from 26.8°C (80.2°F) to 31°C (87.8°F), significantly suited for outdoor activities and sightseeing. Furthermore, the relative humidity drops to its yearly low, which, combined with plenty of sunshine — an average of 11 hours per day — and minimal rainfall, offers a satisfyingly warm and sunny travel experience.In terms of daylight, July offers the most with approximately 14.6 hours, providing ample time for visitors to explore the city’s attractions. The UV index is relatively higher, however, so it’s advisable to be prepared with appropriate sun protection.
The worst time to visit Santarem
Based on the climatological parameters, the less desirable time for a visit to Santarem would be during the winter, particularly from November to January. The temperatures are at their lowest, ranging between 7.5°C (45.5°F) and 15.1°C (59.2°F). Moreover, the area experiences increased rainfall — peaking at 53mm (2.09") in November — and a fewer number of sunny days.The relative humidity and cloud percentage are relatively high, potentially leading to more overcast days. The sharp drop in the number of daylight hours, especially in December with just 9.5 hours, narrows the window for outdoor activities.
Spring weather in Santarem
Spring in Santarem faces a budding transformation from the cool, damp conditions of winter. Average high temperatures gradually rise; memories of winter slowly fading as they reach 23.8°C (74.8°F) by May. Meanwhile, the relative humidity starts reducing and continues on a steady declining trail.Expect rainfall values to display a fluctuating trend, peaking at 46mm (1.81") in April and then reducing to 24mm (0.94") by May. Daylight hours constantly expand, concluding in May with a total of 14.3 hours, granting visitors extended viewing time of the stunning spring landscapes in Santarem.
Summer weather in Santarem
Summer ushers in a distinct shift in climate conditions. Characterised by hot, dry days; day temperatures would hover from 26.8°C (80.2°F) in June to a peak of 31°C (87.8°F) in August, while the night temperatures would fluctuate between 14.6°C (58.3°F) and 15.8°C (60.4°F). The relative humidity dips, reaching its lowest point of the year.Rainfall hits its yearly low, reducing to an almost negligible 3mm (0.12") in both July and August, cementing the summer’s reputation for dryness. Maximum daylight and sunshine hours prevail, with June leading the way with 14.9 daylight hours and a promising 27.3 sunny days.
Autumn weather in Santarem
Autumn in Santarem presents a gradual transition towards the cooler conditions of winter. Temperatures begin a gradual descent, starting from 28.6°C (83.5°F) in September and ending with 17.2°C (63°F) in November. Night temperatures impressively maintain a narrow margin between 15.2°C (59.4°F) and 10.1°C (50.2°F). The relative humidity starts increasing, signalling the onset of the rainy season.Precipitation levels increase notably, culminating in a yearly high of 53mm (2.09") in November. Sunshine hours and the number of sunny days decline steadily, yet maintaining a respectable high.
Winter weather in Santarem
Winter in Santarem presents cooler conditions, marking the phase of the year with the lowest temperatures, ranging from 6.8°C (44.2°F) in January to a maximum of 15.1°C (59.2°F) in December. Nights can get relatively chilly, with temperatures hovering around the 7°C (44.6°F) mark.Higher humidity levels, consistently around 78%, pervade the season. Rainfall surges during winter reaching up to 42mm (1.65") in December. While sunshine is still in abundance, the overall number of sunny days and daylight hours shrinks, reaching a year’s low in December and January, respectively. Although wind speeds display minimal variation, the gust speeds are at their peak during this season, reaching up to 19.3km/h (12mph) in December.
Weather in January
The new year in Santarem, Portugal, opens up with mild and pleasant weather. Even in the midst of winter, temperatures maintain a comfortable range, from 6.8°C (44.2°F) to 14°C (57.2°F). Rainfall is relatively high, marking January as a wet month. Weather in January »Weather in February
Shifting from January, February in Santarem reveals a noticeable decrease in humidity from 81% to 77%, and slight increase in temperatures. The average high temperature rises modestly to 15.2°C (59.4°F), providing slightly warmer days when compared with the preceding month. Weather in February »Weather in March
The arrival of March in Santarem brings early signs of spring. The weather shifts towards a warmer landscape, the average maximum temperature escalates to 17.6°C (63.7°F). With daylight hours extending, the city experiences increased sunshine. Weather in March »Weather in April
April blooms with pleasant weather conditions in Santarem. The temperature scale climbs further, reaching an average maximum of 19.8°C (67.6°F), indicative of the approaching summer. Distinct from March, April experiences a significant rise in rainfall, with the city receiving approximately 46mm (1.81") of precipitation. Weather in April »Weather in May
May marks an evident transition into the hot and dry season in Santarem. Ascending temperatures reveal summer's arrival, with the average high temperature soaring to 23.8°C (74.8°F). In comparison to April, May witnesses more than half the reduction in rainfall, thereby tipping the weather towards aridity. Weather in May »Weather in June
Gliding into June, Santarem enters the full swing of the summer season. A stronger warmth grips the city as the highest temperatures peak at around 26.8°C (80.2°F). Rainfall is considerably reduced in comparison to May, subtly shifting the weather towards aridity. Weather in June »Weather in July
The zenith of summer in Santarem arrives with July. The extraordinary influence of high temperatures, reaching up to 29.8°C (85.6°F), attests to the strength of summer. A striking feature is the scanty rainfall registered this month, making it one of the driest months of the year. Weather in July »Weather in August
August continues the trend of high temperatures in Santarem, exceeding July's average maximum slightly to peak at 31°C (87.8°F). In alignment with the rest of summer, minimal rainfall is noted. The extended daylight hours, paired with high temperatures, add to the city's summer charm. Weather in August »Weather in September
As Santarem steps into September, a visible decrease in temperature to an average high of 28.6°C (83.5°F) signals the onset of autumn. The significant increase in rainfall from the preceding month re-introduces wet conditions. Weather in September »Weather in October
October witnesses a further decline in the weather metrics of Santarem. A noticeable drop in the average high temperature to 23.9°C (75°F) consolidates autumn's influence. Rainfall mounts up substantially compared to September, making October a considerably wet month. Weather in October »Weather in November
Approaching winter, November in Santarem sees continued lowering of temperatures with an average high of 17.2°C (63°F). The rise in rainfall this month, reaching a sizable 53mm (2.09"), positions November as one of the wettest months. Weather in November »Weather in December
December ushers in the coldest month in Santarem, with minimum temperatures dipping to 7.5°C (45.5°F). While temperature drops, a decrease in rainfall contrasts November's wet conditions. The shortened daylight hours align with the winter solstice, offering limited sunshine. Weather in December »Updated: Feb 2, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Santarem's coldest month, January, generally records average temperatures ranging from a high of 14°C (57.2°F) to a low of 6.8°C (44.2°F).
The most humid month in Santarem, Portugal, is January, with an average relative humidity of 81%.
Throughout the year, there are 108.1 rainfall days, and 337mm (13.27") of precipitation is accumulated.
With an average of 5.2h of sunshine, January has the least sunshine of the year.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3.
June has the longest days of the year in Santarem, Portugal, with an average of 14h and 54min of daylight.
The months with the highest UV index in Santarem are June through August, with an average maximum UV index of 6.
The months with the least rainfall in Santarem, Portugal, are July and August Rain falls for 2.9 days and accumulates 3mm (0.12") of rain.
July has the most sunshine of the year, with an average of 11.2h of sunshine.
In Santarem, the average highest temperatures are observed in August, with a high of 31°C (87.8°F) and a low of 15.6°C (60.1°F).
With an average relative humidity of 62%, August is the least humid month.
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.
November is the month with the most rainfall in Santarem. Rain falls for 13.9 days and accumulates 53mm (2.09") of precipitation.
The month with the shortest days is December, with an average of 9h and 30min of daylight.
Average temperature
Santarem, Portugal
The warmest month (with the highest average high temperature) is August (31°C).
The month with the lowest average high temperature is January (14°C).
The month with the highest average low temperature is July (15.8°C).
The coldest months (with the lowest average low temperature) are January and February (6.8°C).
Average pressure
Santarem, Portugal
- Average pressure in January:
1022.3mbar - Average pressure in February:
1020.3mbar - Average pressure in March:
1017.8mbar - Average pressure in April:
1015.5mbar - Average pressure in May:
1016.2mbar - Average pressure in June:
1016.8mbar
- Average pressure in July:
1016.5mbar - Average pressure in August:
1016.3mbar - Average pressure in September:
1016.7mbar - Average pressure in October:
1016mbar - Average pressure in November:
1017.4mbar - Average pressure in December:
1022.6mbar
The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.5mbar).
Average wind speed
Santarem, Portugal
- Average wind speed in January:
11.8km/h - Average wind speed in February:
12.9km/h - Average wind speed in March:
13.1km/h - Average wind speed in April:
12km/h - Average wind speed in May:
12.5km/h - Average wind speed in June:
12.6km/h
- Average wind speed in July:
13.2km/h - Average wind speed in August:
12.4km/h - Average wind speed in September:
10.6km/h - Average wind speed in October:
10.6km/h - Average wind speed in November:
11.5km/h - Average wind speed in December:
11.2km/h
The windiest month (with the highest average wind speed) is July (13.2km/h).
The calmest months (with the lowest average wind speed) are September and October (10.6km/h).
Average humidity
Santarem, Portugal
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (62%).
Average rainfall
Santarem, Portugal
The wettest month (with the highest rainfall) is November (53mm).
The driest months (with the least rainfall) are July and August (3mm).
Average rainfall days
Santarem, Portugal
- Average rainfall days in January:
13.3 days - Average rainfall days in February:
9.5 days - Average rainfall days in March:
13 days - Average rainfall days in April:
13.8 days - Average rainfall days in May:
8.3 days - Average rainfall days in June:
5.3 days
- Average rainfall days in July:
2.9 days - Average rainfall days in August:
2.4 days - Average rainfall days in September:
5.7 days - Average rainfall days in October:
9.9 days - Average rainfall days in November:
13.9 days - Average rainfall days in December:
10.1 days
The month with the highest number of rainy days is November (13.9 days).
The month with the least rainy days is August (2.4 days).
Average daylight / Average sunshine
Santarem, Portugal
- Average daylight in January:
9h and 48min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 54min
- Average daylight in July:
14h and 36min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 0min - Average daylight in December:
9h and 30min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
5h and 12min - Average sunshine in February:
7h and 12min - Average sunshine in March:
7h and 36min - Average sunshine in April:
8h and 18min - Average sunshine in May:
10h and 12min - Average sunshine in June:
10h and 48min
- Average sunshine in July:
11h and 12min - Average sunshine in August:
11h and 0min - Average sunshine in September:
9h and 18min - Average sunshine in October:
7h and 0min - Average sunshine in November:
5h and 36min - Average sunshine in December:
5h and 36min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days
Santarem, Portugal
- Average sunshine days in January:
15.9 days - Average sunshine days in February:
17.3 days - Average sunshine days in March:
16.3 days - Average sunshine days in April:
14.6 days - Average sunshine days in May:
21.3 days - Average sunshine days in June:
22.8 days
- Average sunshine days in July:
27.3 days - Average sunshine days in August:
26.9 days - Average sunshine days in September:
23.3 days - Average sunshine days in October:
19.5 days - Average sunshine days in November:
14.6 days - Average sunshine days in December:
19.3 days
The month with the most sunshine days is July (27.3 days).
The months with the least sunshine days are April and November (14.6 days).
Average UV index
Santarem, Portugal
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover
Santarem, Portugal
The month with the most cloud cover is January (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility
Santarem, Portugal
The month with the highest visibility is June (10km).
The months with the lowest visibility are January, February, March, April, May, July, August, September, October, November and December (9km).
