Tortona weather in September

In September, Tortona sees average daytime highs of 25°C and overnight lows near 16°C, with 73 mm of rain across 7.4 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 23°C by the end. The sky is clear or mostly clear about 48% 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 36 min by month's end. Set against the rest of the year, September is Tortona's 3rd-clearest and 7th-windiest month. For the whole year in context, see Tortona's year-round climate.

Daytime high
25°
4th warmest
Overnight low
16°
9th coldest
Rainfall
73 mm
7.4 wet days
Daylight
12 h 18 min
6:10 AM – 6:28 PM
Cloud cover
46%
3rd clearest
Wind
6 km/h
7th windiest
Solar energy
4.03 kWh/m²
Travel score
7.2
out of 10

Tortona 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 28°C in the first days to 23°C by the end.

A typical September day in Tortona reaches about 25°C in the afternoon and slips back to 16°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 30°C. Set against its neighbours, September runs about 5°C cooler than August and about 7°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12818
22818
32818
42818
52818
62717
72717
82717
92717
102717
112617
122616
132616
142616
152616
162516
172516
182516
192515
202415
212415
222415
232415
242415
252315
262314
272314
282314
292314
302214

How September really feels in Tortona

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.

Tortona weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 567.12.791.3
Feb10° / 536.31.610.12.6
Mar15° / 587.20.611.65.0
Apr19° / 7190.113.26.2
May23° / 14°668.6014.67.0
Jun28° / 18°476.8015.36.5
Jul31° / 20°345015.15.2
Aug30° / 20°436.4013.95.4
Sep25° / 16°737.4012.37.2
Oct19° / 11°929.3010.76.0
Nov12° / 11310.10.49.43.3
Dec / 6782.48.71.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 38%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16931
26931
36832
46733
56733
66733
76733
86634
96634
106634
116535
126535
136535
146436
156436
166337
176238
186238
196139
206040
216040
226040
235941
245842
255743
265644
275545
285446
295347
305248

Chance of precipitation in September

Any precipitation

Tortona gets around 73 mm of rain over 7.4 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 26% and peaks near 29% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
122
222
322
422
522
622
722
823
924
1024
1125
1225
1326
1427
1527
1627
1728
1828
1928
2028
2128
2228
2328
2428
2528
2628
2728
2828
2929
3029

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 40% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
127273512
228273411
32928339
43129328
53229318
63230317
73331306
83431305
93531295
103532294
113632294
123732284
133731283
143831273
153931273
164031263
174131253
184231243
194331233
204431222
214532212
224632202
234732192
244733182
254833171
264834171
274934161
284934151
295035141
305035141

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 5:51 AM to 6:27 AM, and sunset from 6:57 PM to 6:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:516:57
213.05:526:55
313.05:546:53
412.95:556:52
512.95:566:50
612.85:576:48
712.85:596:46
812.76:006:44
912.76:016:42
1012.66:026:40
1112.66:036:38
1212.56:056:36
1312.56:066:34
1412.46:076:32
1512.46:086:30
1612.36:106:28
1712.36:116:26
1812.26:126:24
1912.16:136:22
2012.16:156:20
2112.06:166:18
2212.06:176:16
2311.96:186:14
2411.96:206:12
2511.86:216:10
2611.86:226:08
2711.76:236:06
2811.76:256:04
2911.66:266:03
3011.66:276:01

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.03 kWh/m².

For context, solar energy here swings from a low near 1.21 kWh/m² to a high of 6.47 kWh/m² in July across the year — September's 4.03 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.7Bright
44.7Bright
54.6Bright
64.6Bright
74.5Bright
84.5Bright
94.4Bright
104.3Bright
114.3Bright
124.2Bright
134.2Bright
144.1Bright
154.0Bright
164.0Moderate
173.9Moderate
183.9Moderate
193.8Moderate
203.8Moderate
213.7Moderate
223.6Moderate
233.6Moderate
243.5Moderate
253.5Moderate
263.4Moderate
273.4Moderate
283.3Moderate
293.2Moderate
303.2Moderate
Planning a trip in September

Is September a good time to visit Tortona?

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

7.2
Sightseeing
1st-best month of the year
6.6
Beach & pool
4th-best month of the year

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

What to pack for Tortona in September

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

In September, Tortona sees daytime highs around 25°C and nights near 16°C. Worth packing: light clothes. About 7 days see rain.

light clothes

Sea temperature near Tortona in September

The nearest coast averages about 23°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 58 km away) is warmest in August at about 25°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 3 to Oct 19 — about 4.6 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr15Bracing
May18Cool
Jun22Refreshing
Jul24Warm
Aug25Warm
Sep23Refreshing
Oct20Refreshing
Nov18Cool
Dec16Cool

UV index in Tortona 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 Tortona peaks around July 14 at about 8 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 14UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr7High
May6High
Jun8Very high
Jul9Very high
Aug7High
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Tortona 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 Tortona is worst in January — around 26 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateJan 1726 µg/m³Aug 1617 µg/m³
PM2.5 (µg/m³)Level
Jan26Moderate
Feb23Moderate
Mar26Moderate
Apr23Moderate
May20Moderate
Jun21Moderate
Jul18Moderate
Aug17Moderate
Sep18Moderate
Oct20Moderate
Nov20Moderate
Dec22Moderate
Location & terrain

Where is Tortona?

Tortona sits at 44.9°N, 8.9°E, 122 m above sea level, in Italy. The nearest listed city is Voghera, 16 km away.

Topography around Tortona

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

Within 3 km, the terrain around Tortona has only modest variations in elevation — a maximum elevation change of 162 m around an average of 130 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 597 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,776 m.

The land around Tortona is covered by cropland (42%) and artificial surfaces (22%) within 3 km, cropland (59%) within 16 km, and trees (41%) and cropland (34%) within 80 km.

3 km
162 m
16 km
597 m
80 km
1,776 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Voghera 16 km · Novi Ligure 16 km · Alessandria 20 km · Valenza 21 km · Acqui Terme 40 km · Pavia 40 km · Casale Monferrato 42 km · Vigevano 46 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 Tortona (44.8978°, 8.8637°, elevation 122 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).