Castelo Branco weather in March

In March, Castelo Branco sees average daytime highs of 18°C and overnight lows near 8°C, with 58 mm of rain across 7.4 wet days and about 11.7 hours of daylight. It is the 8th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 16°C in the first days to 19°C by the end. The sky is clear or mostly clear about 38% of the time in March, and the air most often feels dry.

Daylight stretches from about 11 hours at the start of March to 12 h 18 min by month's end. Set against the rest of the year, March is Castelo Branco's 8th-clearest and 1st-windiest month. For the whole year in context, see Castelo Branco's year-round climate.

Daytime high
18°
8th warmest
Overnight low
4th coldest
Rainfall
58 mm
7.4 wet days
Daylight
11 h 42 min
6:49 AM – 6:30 PM
Cloud cover
53%
8th clearest
Wind
11 km/h
1st windiest
Solar energy
4.38 kWh/m²
Travel score
6.2
out of 10

Castelo Branco is city seat of Castelo Branco municipality.

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

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 16°C in the first days to 19°C by the end.

A typical March day in Castelo Branco reaches about 18°C in the afternoon and slips back to 8°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 23°C. Set against its neighbours, March runs about 3°C warmer than February and about 2°C cooler than April.

10°15°20°25°151015202531
Avg high (°C)Avg low (°C)
1166
2166
3166
4167
5177
6177
7177
8177
9177
10177
11187
12187
13188
14188
15188
16188
17188
18188
19188
20188
21188
22188
23188
24188
25188
26188
27198
28198
29198
30198
31198

How March really feels in Castelo Branco

Once humidity and wind are folded in, March averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

March sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Castelo Branco weather by month

How March compares with the rest of the year at a glance. March is the 8th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan13° / 628.29.53.7
Feb15° / 496.410.44.8
Mar18° / 587.411.76.2
Apr20° / 538.1136.6
May24° / 12°51714.27.5
Jun29° / 15°102.514.87.0
Jul32° / 18°41.314.55.1
Aug32° / 18°61.413.65.2
Sep28° / 16°344.612.37.1
Oct22° / 12°838.910.96.9
Nov16° / 778.39.85.4
Dec13° / 758.39.23.9

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 14% of March, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
24951
34951
44951
54951
65050
75050
85248
95248
105347
115545
125545
135644
145644
155743
165743
175842
185743
195743
205644
215545
225446
235347
245248
255149
265149
274951
284951
294852
304852
314753

Chance of precipitation in March

Any precipitation

Castelo Branco gets around 58 mm of rain over 7.4 wet days in March. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 24% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
123
223
323
423
523
622
722
822
922
1022
1122
1222
1322
1422
1522
1622
1723
1823
1923
2024
2124
2225
2326
2426
2527
2627
2728
2828
2928
3028
3128

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
11000
21000
31000
4991
5991
6991
7991
8991
9991
10991
11991
12991
13991
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991
31991

Wind in March

Winds average 11 km/h in March, the windiest month of the year.

Across March, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
211calm
311calm
411calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in March

DaylightNight

Daylight runs from about 11 hours at the start of March to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 78 minutes over March. Sunrise moves from 7:13 AM to 6:25 AM, and sunset from 6:14 PM to 6:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.07:136:14
211.17:116:15
311.17:106:16
411.17:086:17
511.27:076:18
611.27:056:19
711.37:046:20
811.37:026:21
911.47:016:22
1011.46:596:24
1111.56:576:25
1211.56:566:26
1311.56:546:27
1411.66:536:28
1511.66:516:29
1611.76:496:30
1711.76:486:31
1811.86:466:32
1911.86:446:33
2011.96:436:34
2111.96:416:35
2211.96:396:36
2312.06:386:37
2412.06:366:38
2512.16:356:39
2612.16:336:40
2712.26:316:41
2812.26:306:42
2912.36:286:43
3012.36:266:44
3112.36:256:45

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.38 kWh/m².

For context, solar energy here swings from a low near 1.83 kWh/m² to a high of 7.74 kWh/m² in July across the year — March's 4.38 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
13.7Moderate
23.7Moderate
33.8Moderate
43.8Moderate
53.9Moderate
63.9Moderate
74.0Bright
84.1Bright
94.1Bright
104.2Bright
114.2Bright
124.3Bright
134.3Bright
144.4Bright
154.4Bright
164.5Bright
174.5Bright
184.6Bright
194.6Bright
204.6Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.8Bright
274.8Bright
284.8Bright
294.9Bright
304.9Bright
314.9Bright
Planning a trip in March

Is March a good time to visit Castelo Branco?

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

6.2
Sightseeing
6th-best month of the year
1.9
Beach & pool
8th-best month of the year

March is a reasonable time to visit Castelo Branco for sightseeing.

What to pack for Castelo Branco in March

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

In March, Castelo Branco sees daytime highs around 18°C and nights near 8°C. Worth packing: a warm layer. About 7 days see rain.

a warm layer

UV index in Castelo Branco in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Castelo Branco peaks around July 17 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 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 17UV 9Dec 18UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar6High
Apr7High
May7High
Jun9Very high
Jul9Very high
Aug9Very high
Sep6High
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in Castelo Branco in March

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where March falls, not just the annual average.

Air quality in Castelo Branco is worst in August — around 21 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (November, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateModerateGoodAug 1620 µg/m³Nov 236 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar12Moderate
Apr10Good
May8Good
Jun9Good
Jul12Good
Aug21Moderate
Sep10Good
Oct14Moderate
Nov6Good
Dec7Good
Location & terrain

Where is Castelo Branco?

Castelo Branco sits at 39.8°N, 7.5°W, 371 m above sea level, in Portugal. The nearest listed city is Covilhã, 51 km away.

Topography around Castelo Branco

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

Within 3 km, the terrain around Castelo Branco has only modest variations in elevation — a maximum elevation change of 184 m around an average of 362 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 363 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,974 m.

The land around Castelo Branco is covered by grassland (48%), trees (27%) and artificial surfaces (21%) within 3 km, grassland (49%) and trees (39%) within 16 km, and grassland (50%) and trees (43%) within 80 km.

3 km
184 m
16 km
363 m
80 km
1,974 m
treesshrubsgrasslandcroplandartificial surfaceswater
March weather nearby: Covilhã 51 km · Portalegre 59 km · Guarda 82 km · Tomar 82 km · Sequeira 84 km · Santo António dos Olivais 89 km · Coimbra 90 km · São Paulo de Frades 90 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 Castelo Branco (39.8236°, -7.491°, elevation 371 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).