Valletta weather in September

In September, Valletta sees average daytime highs of 25°C and overnight lows near 24°C, with 33 mm of rain across 4 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 24°C by the end. The sky is clear or mostly clear about 77% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Valletta's 4th-clearest and 9th-windiest month. For the whole year in context, see Valletta's year-round climate.

Daytime high
25°
3rd warmest
Overnight low
24°
10th coldest
Rainfall
33 mm
4 wet days
Daylight
12 h 12 min
5:50 AM – 6:03 PM
Cloud cover
26%
4th clearest
Wind
18 km/h
9th windiest
Solar energy
5.3 kWh/m²
Travel score
8.4
out of 10

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 24°C by the end.

A typical September day in Valletta reaches about 25°C in the afternoon and slips back to 24°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 27°C. Set against its neighbours, September runs about 2°C cooler than August and about 2°C warmer than October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12625
22625
32625
42625
52625
62625
72625
82624
92624
102624
112624
122624
132524
142524
152524
162524
172524
182524
192524
202523
212523
222523
232523
242523
252423
262423
272423
282423
292423
302423

Valletta weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan15° / 13°549.49.84.7
Feb14° / 13°50810.64.7
Mar15° / 14°325.411.75.4
Apr17° / 15°143.312.96.5
May19° / 18°61.413.98.0
Jun23° / 22°30.414.49.3
Jul26° / 24°00.114.29.5
Aug27° / 25°30.613.49.0
Sep25° / 24°33412.28.4
Oct23° / 21°526.511.17.7
Nov20° / 18°699.310.16.6
Dec17° / 15°729.89.65.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 14%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1937
2937
3928
4928
5919
69010
79010
89010
98911
108911
118911
128812
138812
148713
158713
168614
178614
188515
198416
208416
218317
228218
238119
248119
258119
267921
277921
287921
297723
307723

Chance of precipitation in September

Any precipitation

Valletta gets around 33 mm of rain over 4 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 13% and peaks near 19% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
15
25
36
47
57
68
78
89
910
1010
1111
1211
1312
1413
1513
1614
1715
1815
1916
2017
2117
2217
2318
2418
2518
2619
2719
2819
2919
3019

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 40% of days. Sticky, muggy-or-worse air turns up on roughly 74% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101932498
2011034478
3011135457
4021237446
5021238426
6021339415
7021440395
8021541384
9021542374
10021642364
11021743353
12031743343
13031843333
14031943332
15032043322
16042143312
17042243302
18042342292
19052442282
20052542271
21062642261
22172641241
23172740231
24182840221
25192939211
26193039201
271103138191
281103238181
292103337170
302113437170

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 16 km/h on the calmest days to 19 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1618light breeze
1718light breeze
1818light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 5:38 AM to 6:01 AM, and sunset from 6:26 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:386:26
212.85:396:24
312.75:396:23
412.75:406:21
512.65:416:20
612.65:426:18
712.65:426:17
812.55:436:15
912.55:446:14
1012.55:456:12
1112.45:466:11
1212.45:466:09
1312.35:476:08
1412.35:486:06
1512.35:496:05
1612.25:506:03
1712.25:506:01
1812.15:516:00
1912.15:525:58
2012.15:535:57
2112.05:545:55
2212.05:545:54
2312.05:555:52
2411.95:565:51
2511.95:575:49
2611.85:585:48
2711.85:585:46
2811.85:595:45
2911.76:005:43
3011.76:015:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.3 kWh/m².

For context, solar energy here swings from a low near 2.31 kWh/m² to a high of 7.63 kWh/m² in June across the year — September's 5.3 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Bright
45.9Bright
55.8Bright
65.8Bright
75.7Bright
85.7Bright
95.6Bright
105.6Bright
115.5Bright
125.5Bright
135.4Bright
145.4Bright
155.3Bright
165.3Bright
175.2Bright
185.2Bright
195.1Bright
205.1Bright
215.0Bright
225.0Bright
234.9Bright
244.9Bright
254.8Bright
264.8Bright
274.7Bright
284.7Bright
294.6Bright
304.6Bright
Planning a trip in September

Hazard calendar for Valletta

In seasonPeak

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

Valletta sees seasonal dust haze (April–June), heaviest in April.

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

Is September a good time to visit Valletta?

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

8.4
Sightseeing
4th-best month of the year
7.7
Beach & pool
3rd-best month of the year

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

What to pack for Valletta in September

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

In September, Valletta sees daytime highs around 25°C and nights near 24°C. Worth packing: light clothes and sun protection. About 4 days see rain.

light clothessun protection

Sea temperature near Valletta in September

The nearest coast averages about 26°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 27°C and coldest in March near 15°C.

It's comfortable for a long swim from May 29 to Nov 25 — about 6 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan16Cool
Feb15Cool
Mar15Cool
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep26Warm
Oct24Refreshing
Nov21Refreshing
Dec18Cool

UV index in Valletta in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Valletta peaks around July 13 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighHighVery highHighModerateJul 13UV 10Jan 10UV 2
UV index (midday)Level
Jan2Low
Feb4Moderate
Mar6High
Apr5Moderate
May6High
Jun10Very high
Jul10Very high
Aug9Very high
Sep7Very high
Oct6High
Nov3Moderate
Dec2Moderate

Air quality in Valletta 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 Valletta is worst in March — around 15 µg/m³ PM2.5 (moderate), about 1.8× the cleanest month (July, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 1615 µg/m³Jul 229 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb14Moderate
Mar15Moderate
Apr14Moderate
May12Good
Jun9Good
Jul9Good
Aug9Good
Sep9Good
Oct11Good
Nov10Good
Dec10Good
Location & terrain

Where is Valletta?

Valletta sits at 35.9°N, 14.5°E, 44 m above sea level, in Malta. The nearest listed city is Sliema, 2.0 km away.

St. Julian'sŻabbarQormiBirkirkaraMarsaxlokkMostaMdina

Topography around Valletta

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

Within 3 km, the terrain around Valletta has only modest variations in elevation — a maximum elevation change of 77 m around an average of 16 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 253 m; within 80 km, only modest variations in elevation — a maximum elevation change of 246 m.

The land around Valletta is covered by water (47%) and artificial surfaces (41%) within 3 km, water (71%) within 16 km, and water (96%) within 80 km.

3 km
77 m
16 km
253 m
80 km
246 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Sliema 2.0 km · St. Julian's 3.0 km · Żabbar 3.0 km · Qormi 5.0 km · Birkirkara 5.0 km · Marsaxlokk 7.0 km · Mosta 8.0 km · Mdina 10 km

Malta travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type G
230 V · 50 Hz
Prices
≈ 66% of US
price level, 2025
GDP per capita
$47,907
2025
Happiness
6.4 / 10
World Happiness, 2025
Safe drinking water
100%
of population, 2024
Homicide rate
0.6
per 100k, 2023
Road deaths
4.1
per 100k/yr, 2019
Income group
High
World Bank
Religion
Roman Catholic more than 90%

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 Valletta (35.8997°, 14.5148°, elevation 44 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. 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).