Santarém weather in August

In August, Santarém sees average daytime highs of 30°C and overnight lows near 17°C, with 7 mm of rain across 1.6 wet days and about 13.5 hours of daylight. It is the 1st-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 77% of the time in August, and the air most often feels comfortable.

Daylight stretches from about 14 h 06 min at the start of August to 12 h 54 min by month's end. Set against the rest of the year, August is Santarém's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Santarém's year-round climate.

Daytime high
30°
1st warmest
Overnight low
17°
12th coldest
Rainfall
7 mm
1.6 wet days
Daylight
13 h 30 min
5:52 AM – 7:25 PM
Cloud cover
21%
2nd clearest
Wind
14 km/h
2nd windiest
Solar energy
6.76 kWh/m²
Travel score
6.9
out of 10

Santarém is city seat of Santarém municipality.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical August day in Santarém reaches about 30°C in the afternoon and slips back to 17°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 36°C. Set against its neighbours, August runs on par with July and about 3°C warmer than September.

10°20°30°40°151015202531
Avg high (°C)Avg low (°C)
13017
23017
33017
43017
53017
63017
73017
83017
93017
103017
113017
123017
133017
143017
153017
163017
173017
182917
192917
202917
212917
222917
232917
242917
252917
262917
272917
282917
292917
302917
312917

Santarém weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan14° / 688.99.64.3
Feb15° / 516.910.55.1
Mar18° / 598.111.76.3
Apr20° / 10°588.5136.6
May23° / 13°527.414.17.4
Jun27° / 15°122.714.78.1
Jul29° / 17°4114.57.3
Aug30° / 17°71.613.56.9
Sep27° / 16°334.512.37.6
Oct22° / 13°799.2116.9
Nov17° / 10°809.29.85.7
Dec15° / 778.89.34.5

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 77% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 12% of August, with mostly cloudy or overcast conditions the remaining 11%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1928
2919
3919
4919
5919
6919
7919
8919
99010
109010
119010
129010
139010
149010
159010
169010
179010
188911
198911
208911
218812
228812
238812
248812
258713
268713
278713
288713
298614
308515
318515

Chance of precipitation in August

Any precipitation

Santarém gets around 7 mm of rain over 1.6 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 5% and peaks near 7% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
14
24
35
45
55
65
75
85
95
105
115
125
135
145
155
165
175
185
195
205
215
225
235
245
255
266
276
286
296
306
317

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the comfortable band about 52% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
11858231
21957231
32056231
42154241
52253241
62253241
72352241
82352241
92351251
102351251
112351251
122252251
132250262
142250262
152151262
162151262
172052262
181952272
191953271
201953271
211952281
221952281
231952281
242052271
252052271
262151271
272152261
282251261
292350261
302350261
312450261

Wind in August

Winds average 14 km/h in August.

Across August, daily wind ranges from about 13 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
115light breeze
215light breeze
315light breeze
415light breeze
515light breeze
615light breeze
715light breeze
815light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 14 h 06 min at the start of August to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over August. Sunrise moves from 5:38 AM to 6:06 AM, and sunset from 7:43 PM to 7:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.15:387:43
214.05:397:42
314.05:407:41
414.05:417:40
513.95:427:39
613.95:437:38
713.95:447:37
813.85:457:36
913.85:467:34
1013.85:477:33
1113.75:487:32
1213.75:497:31
1313.75:507:29
1413.65:507:28
1513.65:517:27
1613.55:527:25
1713.55:537:24
1813.55:547:23
1913.45:557:21
2013.45:567:20
2113.45:577:18
2213.35:587:17
2313.35:597:15
2413.26:007:14
2513.26:017:12
2613.26:027:11
2713.16:037:09
2813.16:047:08
2913.06:057:06
3013.06:067:05
3112.96:067:03

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.76 kWh/m².

For context, solar energy here swings from a low near 1.94 kWh/m² to a high of 7.57 kWh/m² in July across the year — August's 6.76 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.3Intense
27.3Intense
37.2Intense
47.2Intense
57.2Intense
67.2Intense
77.1Intense
87.1Intense
97.0Intense
107.0Intense
117.0Intense
126.9Intense
136.9Intense
146.8Intense
156.8Intense
166.8Intense
176.7Intense
186.7Intense
196.7Intense
206.6Intense
216.6Intense
226.5Intense
236.5Intense
246.4Intense
256.4Intense
266.3Intense
276.3Intense
286.3Intense
296.2Intense
306.2Intense
316.1Intense
Planning a trip in August

Is August a good time to visit Santarém?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.9
Sightseeing
5th-best month of the year
9.0
Beach & pool
2nd-best month of the year

August is a reasonable time to visit Santarém for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Santarém in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Santarém sees daytime highs around 30°C and nights near 17°C. Pack light clothes and sun protection.

light clothessun protection

Sea temperature near Santarém in August

The nearest coast averages about 19°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 58 km away) is warmest in August at about 19°C and coldest in February near 14°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

12°14°16°18°20°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshing
Sea temperature (°C)Comfort
Jan15Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May16Cool
Jun18Cool
Jul18Cool
Aug19Cool
Sep19Cool
Oct18Cool
Nov17Cool
Dec15Cool

UV index in Santarém in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Santarém peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 15UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar6High
Apr8Very high
May7Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct5Moderate
Nov2Moderate
Dec2Low
Location & terrain

Where is Santarém?

Santarém sits at 39.2°N, 8.7°W, 130 m above sea level, in Portugal. The nearest listed city is Azambuja, 24 km away.

Topography around Santarém

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santarém.

Within 3 km, the terrain around Santarém has only modest variations in elevation — a maximum elevation change of 115 m around an average of 33 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 167 m; within 80 km, large variations in elevation — a maximum elevation change of 674 m.

The land around Santarém is covered by grassland (29%), cropland (25%) and trees (22%) within 3 km, grassland (42%), cropland (28%) and trees (23%) within 16 km, and grassland (37%) and trees (36%) within 80 km.

3 km
115 m
16 km
167 m
80 km
674 m
treesshrubsgrasslandcroplandartificial surfaceswater
August weather nearby: Azambuja 24 km · Monsanto 25 km · Torres Novas 30 km · Entroncamento 32 km · Vila Franca de Xira 41 km · Caldas da Rainha 43 km · Alcobaça 43 km · Tomar 47 km

Portugal travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E / F
230 V · 50 Hz
Prices
≈ 60% of US
price level, 2025
GDP per capita
$32,082
2025
Happiness
6.0 / 10
World Happiness, 2025
Safe drinking water
95%
of population, 2024
Homicide rate
0.7
per 100k, 2022
Road deaths
8.2
per 100k/yr, 2019
Income group
High
World Bank
English
Very high
EF EPI 612
Religion
Catholic 68%not applicable 13%no religion 12%no response 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Santarém (39.2338°, -8.6862°, elevation 130 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).