Siderno weather in September

In September, Siderno sees average daytime highs of 24°C and overnight lows near 19°C, with 73 mm of rain across 8.9 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 26°C in the first days to 23°C by the end. The sky is clear or mostly clear about 59% of the time in September, and the air most often feels humid.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Siderno's 4th-clearest and 11th-windiest month. For the whole year in context, see Siderno's year-round climate.

Daytime high
24°
3rd warmest
Overnight low
19°
10th coldest
Rainfall
73 mm
8.9 wet days
Daylight
12 h 12 min
5:42 AM – 5:56 PM
Cloud cover
38%
4th clearest
Wind
8 km/h
11th windiest
Solar energy
4.99 kWh/m²
Travel score
7.5
out of 10

Siderno is chief town of the homonym 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 23°C by the end.

A typical September day in Siderno reaches about 24°C in the afternoon and slips back to 19°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 27°C. Set against its neighbours, September runs about 3°C cooler than August and about 4°C warmer than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12621
22620
32620
42620
52520
62520
72520
82520
92520
102519
112519
122519
132419
142419
152419
162419
172419
182419
192419
202418
212318
222318
232318
242318
252318
262318
272318
282318
292318
302217

Siderno weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan12° / 10012.49.63.1
Feb12° / 8912.210.53.0
Mar14° / 8811.311.74.0
Apr16° / 11°639.9135.2
May20° / 14°336.2147.2
Jun24° / 18°183.514.68.6
Jul27° / 21°112.214.48.7
Aug27° / 21°193.213.58.3
Sep24° / 19°738.912.37.5
Oct21° / 16°10510.7116.5
Nov17° / 12°10911.99.95.2
Dec13° / 11113.49.43.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% 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 25%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18614
28416
38416
48218
58218
68020
77921
87921
97921
107822
117822
127624
137624
147624
157525
167525
177525
187426
197426
207327
217228
227228
237129
247030
257030
266931
276931
286832
296832
306733

Chance of precipitation in September

Any precipitation

Siderno gets around 73 mm of rain over 8.9 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 29% and peaks near 36% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
119
220
321
422
523
624
724
825
925
1026
1126
1227
1327
1428
1529
1629
1730
1831
1932
2032
2133
2233
2334
2434
2534
2634
2735
2835
2935
3036

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 46% of days. Sticky, muggy-or-worse air turns up on roughly 28% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11937512
21939501
321039471
421141451
521242431
621243411
731344390
831445380
931446360
1031547340
1141648330
1241648310
1341749300
1441849290
1541949270
1652050260
1752150240
1852250230
1952351210
2052550200
2162649190
2262749180
2372948160
2473048150
2573147140
2683246140
2783446130
2883545120
2993644110
3093744100

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 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
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
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 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over September. Sunrise moves from 5:28 AM to 5:55 AM, and sunset from 6:21 PM to 5:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:286:21
212.85:296:19
312.85:306:17
412.75:316:16
512.75:326:14
612.75:336:13
712.65:346:11
812.65:356:10
912.55:366:08
1012.55:366:06
1112.55:376:05
1212.45:386:03
1312.45:396:01
1412.35:406:00
1512.35:415:58
1612.25:425:56
1712.25:435:55
1812.25:445:53
1912.15:455:52
2012.15:455:50
2112.05:465:48
2212.05:475:47
2311.95:485:45
2411.95:495:43
2511.95:505:42
2611.85:515:40
2711.85:525:38
2811.75:535:37
2911.75:545:35
3011.75:555:34

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.99 kWh/m².

For context, solar energy here swings from a low near 2.01 kWh/m² to a high of 7.42 kWh/m² in June across the year — September's 4.99 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.8Bright
25.7Bright
35.7Bright
45.6Bright
55.5Bright
65.5Bright
75.4Bright
85.4Bright
95.3Bright
105.3Bright
115.2Bright
125.2Bright
135.1Bright
145.1Bright
155.0Bright
165.0Bright
174.9Bright
184.9Bright
194.8Bright
204.8Bright
214.7Bright
224.7Bright
234.6Bright
244.6Bright
254.5Bright
264.5Bright
274.4Bright
284.4Bright
294.3Bright
304.3Bright
Planning a trip in September

Hazard calendar for Siderno

In seasonPeak

In September, Siderno sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Siderno's rainy season runs September–April, 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 Siderno?

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

7.5
Sightseeing
4th-best month of the year
6.3
Beach & pool
4th-best month of the year

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

What to pack for Siderno in September

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

In September, Siderno sees daytime highs around 24°C and nights near 19°C. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Siderno in September

The nearest coast averages about 25°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 18 km away) is warmest in August at about 27°C and coldest in February near 15°C.

It's comfortable for a long swim from May 28 to Nov 13 — about 5.6 months when the water holds above 20°C.

15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Cool
Feb15Bracing
Mar15Bracing
Apr16Cool
May19Cool
Jun22Refreshing
Jul25Warm
Aug27Warm
Sep25Warm
Oct23Refreshing
Nov20Cool
Dec17Cool

UV index in Siderno 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 Siderno peaks around July 17 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighHighVery highHighModerateLowJul 17UV 10Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5High
Apr5Moderate
May7High
Jun9Very high
Jul10Very high
Aug9Very high
Sep6High
Oct5Moderate
Nov3Moderate
Dec2Low
Location & terrain

Where is Siderno?

Siderno sits at 38.3°N, 16.3°E, 10 m above sea level, in Italy. The nearest listed city is Gioia Tauro, 39 km away.

CatanzaroLamezia TermeSambiase

Topography around Siderno

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

Within 3 km, the terrain around Siderno has only modest variations in elevation — a maximum elevation change of 172 m around an average of 24 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,174 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,931 m.

The land around Siderno is covered by water (43%) and trees (22%) within 3 km, water (44%) and trees (34%) within 16 km, and water (60%) and trees (31%) within 80 km.

3 km
172 m
16 km
1,174 m
80 km
1,931 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Gioia Tauro 39 km · Palmi 40 km · Vibo Valentia 48 km · Reggio Calabria 58 km · Messina 65 km · Catanzaro 73 km · Lamezia Terme 77 km · Sambiase 77 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 Siderno (38.2699°, 16.2961°, elevation 10 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).