Lecco weather in September

In September, Lecco sees average daytime highs of 21°C and overnight lows near 13°C, with 136 mm of rain across 11.3 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 4th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 19°C by the end. The sky is clear or mostly clear about 40% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 h 06 min at the start of September to 11 h 30 min by month's end. Set against the rest of the year, September is Lecco's 4th-clearest and 10th-windiest month. For the whole year in context, see Lecco's year-round climate.

Daytime high
21°
4th warmest
Overnight low
13°
9th coldest
Rainfall
136 mm
11.3 wet days
Daylight
12 h 18 min
6:07 AM – 6:26 PM
Cloud cover
51%
4th clearest
Wind
5 km/h
10th windiest
Solar energy
3.8 kWh/m²
Travel score
6.3
out of 10
Air quality
Moderate
PM2.5 12.8 µg/m³ · 2019

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 19°C by the end.

A typical September day in Lecco reaches about 21°C in the afternoon and slips back to 13°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 25°C. Set against its neighbours, September runs about 5°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12315
22315
32315
42315
52315
62215
72215
82214
92214
102214
112214
122114
132114
142114
152113
162113
172113
182013
192013
202013
212013
222013
232012
241912
251912
261912
271912
281912
291812
301812

How September really feels in Lecco

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.

Lecco weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / -1°587.14.18.90.5
Feb / -0°607.53.9101.3
Mar12° / 799.52.511.63.2
Apr15° / 11313.90.913.34.3
May20° / 11°13116.10.114.75.4
Jun24° / 15°13714.3015.56.2
Jul26° / 17°11313.5015.26.4
Aug25° / 17°12714.1013.96.4
Sep21° / 13°13611.3012.36.3
Oct16° / 14411.50.210.74.6
Nov10° / 14411.21.39.32.3
Dec / 767.93.38.50.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 40%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16733
26733
36733
46733
56733
66733
76634
86535
96535
106436
116436
126337
136337
146238
156139
166040
176040
185941
195941
205842
215743
225743
235644
245545
255446
265347
275347
285347
295149
305050

Chance of precipitation in September

Any precipitation

Lecco gets around 136 mm of rain over 11.3 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 39% and peaks near 41% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
141
240
340
439
539
639
738
838
938
1038
1138
1238
1339
1439
1539
1639
1739
1839
1939
2039
2139
2239
2339
2439
2539
2639
2739
2840
2940
3041

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 51% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13333322
23433302
33634282
43834261
53935241
64135231
74236211
84336201
94437191
104537181
114537170
124637160
134737150
144837140
155037130
165137120
175236120
185336110
195535100
20563590
21583480
22603370
23603370
24623260
25643150
26663040
27663040
28682930
29692830
30702820

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 h 06 min at the start of September to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 96 minutes over September. Sunrise moves from 5:48 AM to 6:25 AM, and sunset from 6:56 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:486:56
213.15:496:54
313.05:516:52
413.05:526:50
512.95:536:48
612.95:546:46
712.85:566:44
812.85:576:42
912.75:586:40
1012.65:596:38
1112.66:016:36
1212.56:026:34
1312.56:036:32
1412.46:056:30
1512.46:066:28
1612.36:076:26
1712.36:086:24
1812.26:106:22
1912.26:116:20
2012.16:126:18
2112.06:146:16
2212.06:156:14
2311.96:166:12
2411.96:186:10
2511.86:196:08
2611.86:206:06
2711.76:216:04
2811.76:236:02
2911.66:246:00
3011.56:255:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.8 kWh/m².

For context, solar energy here swings from a low near 1.28 kWh/m² to a high of 6.07 kWh/m² in July across the year — September's 3.8 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.5Bright
24.5Bright
34.5Bright
44.4Bright
54.3Bright
64.3Bright
74.3Bright
84.2Bright
94.1Bright
104.1Bright
114.0Bright
124.0Moderate
133.9Moderate
143.9Moderate
153.8Moderate
163.8Moderate
173.7Moderate
183.6Moderate
193.6Moderate
203.5Moderate
213.5Moderate
223.4Moderate
233.4Moderate
243.3Moderate
253.3Moderate
263.2Moderate
273.2Moderate
283.1Moderate
293.1Moderate
303.0Moderate
Planning a trip in September

Is September a good time to visit Lecco?

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

6.3
Sightseeing
3rd-best month of the year
3.8
Beach & pool
4th-best month of the year

September is a reasonable time to visit Lecco for sightseeing.

What to pack for Lecco in September

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

In September, Lecco sees daytime highs around 21°C and nights near 13°C. Worth packing: rain gear. About 11 days see rain.

rain gear

UV index in Lecco 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 Lecco peaks around July 16 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 16UV 8Dec 21UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr6High
May7Very high
Jun7Very high
Jul8Very high
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

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

Seasonal pattern from CAMS reanalysis, scaled to Lecco's WHO annual average of 12.8 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodMar 2116 µg/m³Sep 1411 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb13Moderate
Mar16Moderate
Apr15Moderate
May13Moderate
Jun14Moderate
Jul12Moderate
Aug11Good
Sep11Good
Oct11Good
Nov11Good
Dec12Moderate
Location & terrain

Where is Lecco?

Lecco sits at 45.9°N, 9.4°E, 214 m above sea level, in Italy. The nearest listed city is Erba, 14 km away.

Topography around Lecco

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

Within 3 km, the terrain around Lecco has large variations in elevation — a maximum elevation change of 1,140 m around an average of 387 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 2,196 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,901 m.

The land around Lecco is covered by trees (55%) and artificial surfaces (25%) within 3 km, trees (70%) within 16 km, and trees (46%) within 80 km.

3 km
1,140 m
16 km
2,196 m
80 km
3,901 m
treesgrasslandcroplandartificial surfacesbare terrainsnow and icewatermoss and lichen
September weather nearby: Erba 14 km · Giussano 23 km · Carate Brianza 24 km · Cantù 24 km · Mariano Comense 24 km · Como 25 km · Arcore 26 km · Vimercate 27 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 Lecco (45.8559°, 9.397°, elevation 214 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).