Poggibonsi weather in September

In September, Poggibonsi sees average daytime highs of 25°C and overnight lows near 14°C, with 94 mm of rain across 8.9 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 27°C in the first days to 22°C by the end. The sky is clear or mostly clear about 49% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Poggibonsi's 4th-clearest and 9th-windiest month. For the whole year in context, see Poggibonsi's year-round climate.

Daytime high
25°
4th warmest
Overnight low
14°
9th coldest
Rainfall
94 mm
8.9 wet days
Daylight
12 h 18 min
6:01 AM – 6:19 PM
Cloud cover
44%
4th clearest
Wind
7 km/h
9th windiest
Solar energy
4.31 kWh/m²
Travel score
7.1
out of 10

Poggibonsi is chief town of the homonym municipality.

Air quality
Moderate
PM2.5 11.8 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 27°C in the first days to 22°C by the end.

A typical September day in Poggibonsi reaches about 25°C in the afternoon and slips back to 14°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 28°C. Set against its neighbours, September runs about 5°C cooler than August and about 5°C warmer than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12716
22716
32716
42716
52615
62615
72615
82615
92615
102615
112515
122515
132514
142514
152514
162414
172414
182414
192414
202414
212413
222313
232313
242313
252313
262313
272213
282213
292212
302212

How September really feels in Poggibonsi

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.

Poggibonsi 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 / 608.70.99.11.8
Feb10° / 688.81.110.22.5
Mar14° / 689.30.411.64.2
Apr17° / 7911.4013.25.4
May22° / 11°729.9014.56.7
Jun26° / 15°497.3015.27.4
Jul29° / 18°324.4014.96.7
Aug29° / 18°405.6013.86.5
Sep25° / 14°948.9012.37.1
Oct19° / 10°11211010.86.1
Nov14° / 12312.20.19.53.7
Dec10° / 8510.60.48.82.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% 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 33%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17921
27921
37822
47822
57822
67624
77525
87426
97327
107129
117030
126931
136733
146733
156535
166436
176436
186238
196238
206139
216139
226139
236040
246139
256139
266040
276040
285941
295941
305941

Chance of precipitation in September

Any precipitation

Poggibonsi gets around 94 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 30% and peaks near 34% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
125
226
326
426
527
627
728
828
929
1029
1130
1230
1331
1431
1531
1632
1732
1832
1932
2032
2132
2232
2332
2432
2532
2633
2733
2833
2934
3034

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 (%)
122343311
224353110
32536309
42736297
52837296
62938285
73038275
83039274
93139264
103139264
113139263
123239263
133239253
143338253
153438253
163537253
173637243
183736243
193935233
204035223
214234213
224334213
234433202
244633192
254733182
264833182
274933171
285033161
295133151
305233141

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours 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 84 minutes over September. Sunrise moves from 5:44 AM to 6:17 AM, and sunset from 6:47 PM to 5:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:446:47
213.05:456:45
312.95:466:43
412.95:476:41
512.85:486:39
612.85:496:37
712.75:516:35
812.75:526:34
912.65:536:32
1012.65:546:30
1112.55:556:28
1212.55:566:26
1312.45:576:24
1412.45:596:22
1512.36:006:20
1612.36:016:19
1712.26:026:17
1812.26:036:15
1912.16:046:13
2012.16:066:11
2112.06:076:09
2212.06:086:07
2311.96:096:05
2411.96:106:03
2511.86:116:01
2611.86:136:00
2711.76:145:58
2811.76:155:56
2911.66:165:54
3011.66:175:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.31 kWh/m².

For context, solar energy here swings from a low near 1.37 kWh/m² to a high of 6.86 kWh/m² in July across the year — September's 4.31 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.1Bright
35.0Bright
45.0Bright
54.9Bright
64.8Bright
74.8Bright
84.7Bright
94.7Bright
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
273.6Moderate
283.6Moderate
293.5Moderate
303.5Moderate
Planning a trip in September

Is September a good time to visit Poggibonsi?

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

7.1
Sightseeing
2nd-best month of the year
6.2
Beach & pool
4th-best month of the year

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

What to pack for Poggibonsi in September

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

In September, Poggibonsi sees daytime highs around 25°C and nights near 14°C. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

Sea temperature near Poggibonsi 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 63 km away) is warmest in August at about 25°C and coldest in February near 14°C.

It's comfortable for a long swim from Jun 3 to Oct 22 — about 4.7 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb14Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul24Warm
Aug25Warm
Sep23Refreshing
Oct21Refreshing
Nov18Cool
Dec16Cool

UV index in Poggibonsi 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 Poggibonsi 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 14UV 9Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar5Moderate
Apr6High
May6High
Jun8Very high
Jul9Very high
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Poggibonsi?

Poggibonsi sits at 43.5°N, 11.1°E, 116 m above sea level, in Italy. The nearest listed city is Colle di Val d'Elsa, 6.0 km away.

Topography around Poggibonsi

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

Within 3 km, the terrain around Poggibonsi has only modest variations in elevation — a maximum elevation change of 190 m around an average of 141 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 611 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,923 m.

The land around Poggibonsi is covered by trees (49%) within 3 km, trees (66%) within 16 km, and trees (63%) within 80 km.

3 km
190 m
16 km
611 m
80 km
1,923 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Colle di Val d'Elsa 6.0 km · Siena 22 km · Scandicci 32 km · Empoli 32 km · San Giovanni Valdarno 33 km · San Miniato 33 km · Montevarchi 35 km · San Miniato Basso 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 Poggibonsi (43.4706°, 11.148°, elevation 116 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).