Forlì weather in September

In September, Forlì sees average daytime highs of 26°C and overnight lows near 15°C, with 61 mm of rain across 7.6 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 28°C in the first days to 24°C by the end. The sky is clear or mostly clear about 50% 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 Forlì's 4th-clearest and 7th-windiest month. For the whole year in context, see Forlì's year-round climate.

Daytime high
26°
4th warmest
Overnight low
15°
9th coldest
Rainfall
61 mm
7.6 wet days
Daylight
12 h 18 min
5:57 AM – 6:15 PM
Cloud cover
43%
4th clearest
Wind
8 km/h
7th windiest
Solar energy
4.29 kWh/m²
Travel score
7.2
out of 10
Air quality
Moderate
PM2.5 14.2 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 28°C in the first days to 24°C by the end.

A typical September day in Forlì reaches about 26°C in the afternoon and slips back to 15°C overnight — a 11°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 6°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12917
22817
32817
42817
52817
62816
72716
82716
92716
102716
112716
122716
132616
142615
152615
162615
172615
182515
192515
202515
212514
222514
232514
242414
252414
262414
272414
282414
292413
302313

How September really feels in Forlì

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.

Forlì weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 467.21.29.11.9
Feb11° / 627.41.510.22.8
Mar15° / 598.10.511.64.9
Apr19° / 729.80.113.26.1
May24° / 13°648.9014.57.1
Jun29° / 17°526.6015.36.2
Jul32° / 19°456.30154.9
Aug31° / 19°496.8013.85.2
Sep26° / 15°617.6012.37.2
Oct20° / 11°688.6010.86.6
Nov14° / 8410.10.39.44.1
Dec10° / 669.30.88.72.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% 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 32%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17624
27525
37624
47525
57525
67426
77426
87327
97327
107129
117129
127030
136931
146931
156733
166733
176634
186535
196535
206436
216436
226337
236337
246337
256238
266238
276238
286139
296040
306040

Chance of precipitation in September

Any precipitation

Forlì gets around 61 mm of rain over 7.6 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 26% and peaks near 27% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
127
227
327
427
527
626
726
826
926
1026
1126
1226
1326
1426
1526
1626
1726
1826
1926
2026
2126
2226
2325
2425
2525
2625
2725
2826
2926
3026

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 37% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
124293512
225303411
326313410
42731338
52832337
62833326
72933326
83034325
93034315
103134314
113134304
123234304
133334294
143434284
153534274
163634264
173734254
183834244
194034233
204134223
214334213
224434193
234534183
244634173
254734162
264835152
274935142
285035132
295036131
305136121

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 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
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
258calm
268calm
278calm
288calm
298calm
308calm

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 5:39 AM to 6:14 AM, and sunset from 6:44 PM to 5:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:396:44
213.05:406:42
313.05:426:40
412.95:436:38
512.95:446:36
612.85:456:34
712.85:466:33
812.75:486:31
912.75:496:29
1012.65:506:27
1112.65:516:25
1212.55:526:23
1312.55:546:21
1412.45:556:19
1512.45:566:17
1612.35:576:15
1712.25:586:13
1812.26:006:11
1912.16:016:09
2012.16:026:07
2112.06:036:05
2212.06:046:04
2311.96:066:02
2411.96:076:00
2511.86:085:58
2611.86:095:56
2711.76:105:54
2811.76:125:52
2911.66:135:50
3011.66:145:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.29 kWh/m².

For context, solar energy here swings from a low near 1.29 kWh/m² to a high of 6.77 kWh/m² in July across the year — September's 4.29 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
34.9Bright
44.9Bright
54.8Bright
64.8Bright
74.7Bright
84.7Bright
94.6Bright
104.6Bright
114.5Bright
124.5Bright
134.4Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.1Bright
194.1Bright
204.0Bright
214.0Moderate
223.9Moderate
233.9Moderate
243.8Moderate
253.8Moderate
263.7Moderate
273.7Moderate
283.6Moderate
293.6Moderate
303.5Moderate
Planning a trip in September

Is September a good time to visit Forlì?

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
6.9
Beach & pool
4th-best month of the year

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

What to pack for Forlì in September

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

In September, Forlì sees daytime highs around 26°C and nights near 15°C. Worth packing: light clothes. About 8 days see rain.

light clothes

Sea temperature near Forlì 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 32 km away) is warmest in August at about 26°C and coldest in February near 9°C.

It's comfortable for a long swim from May 27 to Oct 9 — about 4.5 months when the water holds above 20°C.

10°20°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan11Bracing
Feb9Bracing
Mar10Bracing
Apr14Bracing
May19Cool
Jun23Refreshing
Jul25Warm
Aug26Warm
Sep23Refreshing
Oct19Cool
Nov15Cool
Dec13Bracing

UV index in Forlì 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 Forlì peaks around July 15 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 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 15UV 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar5Moderate
Apr7High
May6High
Jun8Very high
Jul9Very high
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Forlì 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 Forlì is worst in March — around 18 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

Seasonal pattern from CAMS reanalysis, scaled to Forlì's WHO annual average of 14.2 µg/m³.

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateModerateMar 1817 µg/m³Sep 1512 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb15Moderate
Mar18Moderate
Apr16Moderate
May15Moderate
Jun15Moderate
Jul13Moderate
Aug13Moderate
Sep12Good
Oct13Moderate
Nov12Moderate
Dec13Moderate
Location & terrain

Where is Forlì?

Forlì sits at 44.2°N, 12.0°E, 34 m above sea level, in Italy. The nearest listed city is Faenza, 15 km away.

Topography around Forlì

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

Within 3 km, the terrain around Forlì has only modest variations in elevation — a maximum elevation change of 28 m around an average of 29 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 498 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,642 m.

The land around Forlì is covered by artificial surfaces (36%), trees (22%) and grassland (21%) within 3 km, cropland (39%), grassland (32%) and trees (20%) within 16 km, and trees (39%) and cropland (25%) within 80 km.

3 km
28 m
16 km
498 m
80 km
1,642 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Faenza 15 km · Cesena 19 km · Lugo 25 km · Ravenna 25 km · Cervia 25 km · Cesenatico 29 km · Imola 30 km · Bellaria-Igea Marina 35 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 Forlì (44.2218°, 12.0414°, elevation 34 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).