Guarda weather in September

In September, Guarda sees average daytime highs of 24°C and overnight lows near 13°C, with 44 mm of rain across 5.6 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 22°C by the end. The sky is clear or mostly clear about 53% of the time in September, and the air most often feels dry.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Guarda's 4th-clearest and 12th-windiest month. For the whole year in context, see Guarda's year-round climate.

Daytime high
24°
4th warmest
Overnight low
13°
9th coldest
Rainfall
44 mm
5.6 wet days
Daylight
12 h 18 min
6:15 AM – 6:31 PM
Cloud cover
41%
4th clearest
Wind
9 km/h
12th windiest
Solar energy
5.03 kWh/m²
Travel score
7.8
out of 10

Guarda is city seat of Guarda municipality.

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 26°C in the first days to 22°C by the end.

A typical September day in Guarda reaches about 24°C in the afternoon and slips back to 13°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 29°C. Set against its neighbours, September runs about 4°C cooler than August and about 6°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12714
22714
32614
42614
52614
62614
72614
82614
92514
102514
112514
122513
132413
142413
152413
162413
172413
182313
192313
202312
212312
222312
232312
242212
252212
262212
272212
282212
292212
302111

How September really feels in Guarda

Once humidity and wind are folded in, September 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

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

Guarda weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 779.20.89.42.0
Feb11° / 557.50.710.42.9
Mar14° / 648.80.211.74.3
Apr16° / 6710.50135.0
May20° / 10°649.5014.26.4
Jun25° / 13°234.8014.87.9
Jul28° / 15°102.6014.67.4
Aug28° / 15°133.3013.67.4
Sep24° / 13°445.6012.37.8
Oct18° / 10°1059.9010.95.9
Nov13° / 869.90.29.73.5
Dec10° / 859.10.29.22.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18119
28020
38020
47921
57822
67822
77624
87624
97426
107327
117228
127129
137030
146931
156733
166733
176634
186535
196436
206337
216337
226238
236238
246139
256139
266040
276139
286040
296040
305941

Chance of precipitation in September

Any precipitation

Guarda gets around 44 mm of rain over 5.6 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 18% and peaks near 22% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
114
214
314
414
514
614
714
815
915
1016
1116
1217
1317
1418
1518
1619
1719
1820
1920
2021
2121
2222
2322
2422
2522
2622
2722
2822
2922
3022

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 82% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
179201
279201
379201
481190
581190
682180
782180
882180
982180
1082180
1182180
1282180
1382180
1481190
1581190
1681190
1781190
1881190
1982180
2082180
2182180
2282180
2382180
2483170
2583170
2683161
2783161
2884151
2985141
3085141

Wind in September

Winds average 9 km/h in September, the calmest month.

Across September, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 6:00 AM to 6:30 AM, and sunset from 6:57 PM to 6:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.96:006:57
212.96:016:55
312.96:026:54
412.86:036:52
512.86:046:50
612.76:056:49
712.76:066:47
812.66:076:45
912.66:086:43
1012.56:096:42
1112.56:106:40
1212.46:116:38
1312.46:126:37
1412.46:136:35
1512.36:146:33
1612.36:156:31
1712.26:166:30
1812.26:176:28
1912.16:186:26
2012.16:196:24
2112.06:206:23
2212.06:226:21
2311.96:236:19
2411.96:246:17
2511.96:256:16
2611.86:266:14
2711.86:276:12
2811.76:286:10
2911.76:296:09
3011.66:306:07

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.03 kWh/m².

For context, solar energy here swings from a low near 1.7 kWh/m² to a high of 7.63 kWh/m² in July across the year — September's 5.03 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.0Bright
25.9Bright
35.8Bright
45.8Bright
55.7Bright
65.6Bright
75.6Bright
85.5Bright
95.4Bright
105.4Bright
115.3Bright
125.2Bright
135.2Bright
145.1Bright
155.0Bright
165.0Bright
174.9Bright
184.8Bright
194.8Bright
204.7Bright
214.7Bright
224.6Bright
234.6Bright
244.5Bright
254.5Bright
264.4Bright
274.4Bright
284.3Bright
294.3Bright
304.2Bright
Planning a trip in September

Hazard calendar for Guarda

In seasonPeak

None of Guarda's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Guarda's rainy season runs October–May, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Guarda?

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

7.8
Sightseeing
2nd-best month of the year
6.4
Beach & pool
4th-best month of the year

September is one of the better times to visit Guarda for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Guarda in September

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

In September, Guarda sees daytime highs around 24°C and nights near 13°C. Worth packing: light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Guarda in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Guarda peaks around July 17 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 17UV 9Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar6High
Apr7High
May7High
Jun9Very high
Jul10Very high
Aug9Very high
Sep6High
Oct5Moderate
Nov2Moderate
Dec2Low

Air quality in Guarda in September

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Guarda is worst in August — around 40 µg/m³ PM2.5 (poor), about 6.0× the cleanest month (November, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateModerateGoodAug 1736 µg/m³Nov 237 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar13Moderate
Apr10Good
May8Good
Jun10Good
Jul11Good
Aug40Poor
Sep13Moderate
Oct26Moderate
Nov7Good
Dec7Good
Location & terrain

Where is Guarda?

Guarda sits at 40.5°N, 7.3°W, 1,008 m above sea level, in Portugal. The nearest listed city is Sequeira, 4.0 km away.

Topography around Guarda

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

Within 3 km, the terrain around Guarda has significant variations in elevation — a maximum elevation change of 260 m around an average of 891 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 887 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,942 m.

The land around Guarda is covered by grassland (53%) and trees (21%) within 3 km, grassland (62%) and trees (29%) within 16 km, and grassland (56%) and trees (35%) within 80 km.

3 km
260 m
16 km
887 m
80 km
1,942 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Sequeira 4.0 km · Covilhã 35 km · Viseu 56 km · Vila Nova de Foz Côa 61 km · Custoias 63 km · Castelo Branco 82 km · Arouca 93 km · Vila Real 94 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 Guarda (40.5375°, -7.2663°, elevation 1,008 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).