Sanremo weather in September

In September, Sanremo sees average daytime highs of 21°C and overnight lows near 19°C, with 60 mm of rain across 6.6 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 20°C by the end. The sky is clear or mostly clear about 52% of the time in September, and the air most often feels humid.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Sanremo's 3rd-clearest and 9th-windiest month. For the whole year in context, see Sanremo's year-round climate.

Daytime high
21°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
60 mm
6.6 wet days
Daylight
12 h 18 min
6:14 AM – 6:32 PM
Cloud cover
42%
3rd clearest
Wind
11 km/h
9th windiest
Solar energy
4.49 kWh/m²
Travel score
7.3
out of 10

Sanremo is chief town of the homonym municipality.

Air quality
Good
PM10 23.1 µg/m³ · 2010

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 23°C in the first days to 20°C by the end.

A typical September day in Sanremo reaches about 21°C in the afternoon and slips back to 19°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 23°C. Set against its neighbours, September runs about 3°C cooler than August and about 3°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12321
22320
32320
42320
52220
62220
72220
82220
92220
102220
112219
122219
132219
142119
152119
162119
172119
182119
192119
202118
212118
222018
232018
242018
252018
262018
272018
282018
292017
302017

Sanremo 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 daysSnow daysDaylight (hours)Travel score
Jan10° / 617.42.19.12.7
Feb10° / 506.6210.22.7
Mar12° / 10°576.71.411.63.6
Apr14° / 12°688.90.513.24.3
May18° / 15°479.3014.55.9
Jun21° / 19°347.2015.27.3
Jul24° / 21°205.4014.98.2
Aug24° / 22°184.8013.88.2
Sep21° / 19°606.6012.37.3
Oct18° / 16°888.40.110.86.1
Nov14° / 12°1149.90.79.54.2
Dec12° / 798.11.88.83.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 30%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17921
27822
37822
47723
57723
67624
77525
87426
97426
107228
117228
127129
137129
147030
157030
166931
176931
186832
196832
206832
216733
226733
236733
246733
256535
266535
276535
286535
296436
306436

Chance of precipitation in September

Any precipitation

Sanremo gets around 60 mm of rain over 6.6 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 22% and peaks near 24% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
119
219
319
420
520
621
721
821
921
1021
1121
1221
1322
1422
1522
1623
1723
1823
1923
2023
2123
2223
2323
2423
2524
2624
2724
2824
2924
3024

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 14% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1101837305
2111938284
3112039263
4122139252
5132240232
6132341221
7142341211
8152341201
9162442190
10162442180
11172442170
12182442160
13192442160
14202441150
15202540140
16212640130
17222739120
18232837110
19242936100
2025303590
2126313480
2227333370
2327343270
2428353160
2528373050
2629383040
2730382930
2831392830
2932392720
3033392710

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512light breeze
2612light breeze
2712light breeze
2812light breeze
2912light breeze
3012light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 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 90 minutes over September. Sunrise moves from 5:57 AM to 6:31 AM, and sunset from 7:00 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:577:00
213.05:586:59
313.05:596:57
412.96:006:55
512.96:016:53
612.86:036:51
712.86:046:49
812.76:056:47
912.76:066:45
1012.66:076:44
1112.66:086:42
1212.56:106:40
1312.56:116:38
1412.46:126:36
1512.36:136:34
1612.36:146:32
1712.26:156:30
1812.26:176:28
1912.16:186:26
2012.16:196:24
2112.06:206:23
2212.06:216:21
2311.96:236:19
2411.96:246:17
2511.86:256:15
2611.86:266:13
2711.76:276:11
2811.76:296:09
2911.66:306:07
3011.66:316:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.49 kWh/m².

For context, solar energy here swings from a low near 1.54 kWh/m² to a high of 6.74 kWh/m² in July across the year — September's 4.49 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.1Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.7Bright
124.7Bright
134.6Bright
144.6Bright
154.5Bright
164.5Bright
174.4Bright
184.4Bright
194.3Bright
204.3Bright
214.2Bright
224.2Bright
234.1Bright
244.0Bright
254.0Bright
264.0Moderate
273.9Moderate
283.9Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Is September a good time to visit Sanremo?

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

7.3
Sightseeing
3rd-best month of the year
4.6
Beach & pool
3rd-best month of the year

September is one of the better times to visit Sanremo for general sightseeing.

What to pack for Sanremo in September

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

In September, Sanremo sees daytime highs around 21°C and nights near 19°C. Little to plan around — just the basics. About 7 days see rain.

Sea temperature near Sanremo in September

The nearest coast averages about 22°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 25°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 7 to Oct 14 — about 4.3 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr15Bracing
May18Cool
Jun21Refreshing
Jul24Refreshing
Aug25Warm
Sep22Refreshing
Oct20Cool
Nov18Cool
Dec16Cool

UV index in Sanremo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sanremo peaks around July 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateVery highVery highHighModerateLowJul 14UV 9Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar5Moderate
Apr7Very high
May7High
Jun8Very high
Jul9Very high
Aug7Very high
Sep5High
Oct4Moderate
Nov2Moderate
Dec1Low

Air quality in Sanremo 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 Sanremo is worst in March — around 16 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 1816 µg/m³Nov 2110 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb14Moderate
Mar16Moderate
Apr15Moderate
May14Moderate
Jun14Moderate
Jul13Moderate
Aug13Moderate
Sep11Good
Oct12Moderate
Nov10Good
Dec11Good
Location & terrain

Where is Sanremo?

Sanremo sits at 43.8°N, 7.8°E, 15 m above sea level, in Italy. The nearest listed city is Ventimiglia, 14 km away.

Topography around Sanremo

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

Within 3 km, the terrain around Sanremo has significant variations in elevation — a maximum elevation change of 477 m around an average of 85 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,618 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,195 m.

The land around Sanremo is covered by water (43%), trees (22%) and artificial surfaces (22%) within 3 km, water (48%) and trees (42%) within 16 km, and trees (46%) and water (36%) within 80 km.

3 km
477 m
16 km
1,618 m
80 km
3,195 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Ventimiglia 14 km · Menton 22 km · Imperia 22 km · Monte Carlo 29 km · Monaco 30 km · Saint-Roch 41 km · Nice 43 km · Albenga 44 km

Italy travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / F / L
230 V · 50 Hz
Prices
≈ 69% of US
price level, 2025
GDP per capita
$43,309
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
97%
of population, 2024
Homicide rate
0.6
per 100k, 2023
Road deaths
5.3
per 100k/yr, 2019
Income group
High
World Bank
English
Moderate
EF EPI 513
Religion
Christian 81%unaffiliated 13%Muslim 5%other 1%

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 Sanremo (43.8173°, 7.7772°, elevation 15 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).