Montecatini-Terme weather in September

In September, Montecatini-Terme sees average daytime highs of 22°C and overnight lows near 13°C, with 96 mm of rain across 10.5 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 20°C by the end. The sky is clear or mostly clear about 44% 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 Montecatini-Terme's 4th-clearest and 8th-windiest month. For the whole year in context, see Montecatini-Terme's year-round climate.

Daytime high
22°
4th warmest
Overnight low
13°
9th coldest
Rainfall
96 mm
10.5 wet days
Daylight
12 h 18 min
6:02 AM – 6:20 PM
Cloud cover
47%
4th clearest
Wind
6 km/h
8th windiest
Solar energy
4.29 kWh/m²
Travel score
6.7
out of 10

Montecatini-Terme 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 24°C in the first days to 20°C by the end.

A typical September day in Montecatini-Terme reaches about 22°C in the afternoon and slips back to 13°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 26°C. Set against its neighbours, September runs about 4°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12415
22415
32415
42415
52414
62314
72314
82314
92314
102314
112314
122214
132214
142213
152213
162213
172213
182113
192113
202113
212113
222113
232112
242012
252012
262012
272012
282012
292012
301912

How September really feels in Montecatini-Terme

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.

Montecatini-Terme weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan / 9010.22.49.10.8
Feb / 93102.610.21.4
Mar12° / 9611.11.511.63.0
Apr15° / 11013.80.513.24.1
May19° / 11°9213.2014.55.8
Jun23° / 14°7310.8015.26.9
Jul26° / 17°519.7014.97.2
Aug26° / 17°479.1013.87.2
Sep22° / 13°9610.5012.36.7
Oct17° / 10°14612.5010.85.1
Nov11° / 15713.10.99.52.6
Dec / 12711.528.81.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 34%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17822
27723
37723
47624
57624
67525
77426
87327
97327
107129
117030
127030
136832
146733
156634
166535
176436
186337
196238
206139
216040
226040
235941
245941
255842
265743
275644
285644
295545
305347

Chance of precipitation in September

Any precipitation

Montecatini-Terme gets around 96 mm of rain over 10.5 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 36% and peaks near 38% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
134
234
334
434
534
634
734
835
935
1035
1136
1236
1336
1437
1537
1637
1738
1838
1938
2038
2138
2237
2337
2437
2537
2637
2737
2837
2938
3038

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 45% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12536345
22737324
32838304
43039283
53140263
63241252
73342232
83442222
93542211
103642201
113742201
123842191
133941191
144140181
154239181
164438171
174637161
184836161
194935151
205134141
215233141
225432131
235631121
245831110
255930110
266030100
27622990
28622990
29632980
30652870

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 5:45 AM to 6:19 AM, and sunset from 6:48 PM to 5:53 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.15:456:48
213.05:466:47
313.05:476:45
412.95:486:43
512.95:496:41
612.85:516:39
712.85:526:37
812.75:536:35
912.75:546:34
1012.65:556:32
1112.65:566:30
1212.55:586:28
1312.55:596:26
1412.46:006:24
1512.36:016:22
1612.36:026:20
1712.26:036:18
1812.26:056:16
1912.16:066:14
2012.16:076:12
2112.06:086:11
2212.06:096:09
2311.96:116:07
2411.96:126:05
2511.86:136:03
2611.86:146:01
2711.76:155:59
2811.76:175:57
2911.66:185:55
3011.66:195:53

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 1.33 kWh/m² to a high of 6.76 kWh/m² in July across the year — September's 4.29 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.0Bright
35.0Bright
44.9Bright
54.9Bright
64.8Bright
74.8Bright
84.7Bright
94.6Bright
104.6Bright
114.5Bright
124.5Bright
134.4Bright
144.3Bright
154.3Bright
164.2Bright
174.2Bright
184.1Bright
194.0Bright
204.0Moderate
213.9Moderate
223.9Moderate
233.8Moderate
243.8Moderate
253.7Moderate
263.7Moderate
273.6Moderate
283.5Moderate
293.5Moderate
303.4Moderate
Planning a trip in September

Is September a good time to visit Montecatini-Terme?

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

6.7
Sightseeing
4th-best month of the year
4.5
Beach & pool
4th-best month of the year

September is a reasonable time to visit Montecatini-Terme for sightseeing.

What to pack for Montecatini-Terme in September

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

In September, Montecatini-Terme sees daytime highs around 22°C and nights near 13°C. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Montecatini-Terme 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 52 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 1 to Oct 20 — about 4.7 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan14Bracing
Feb13Bracing
Mar14Bracing
Apr15Cool
May18Cool
Jun22Refreshing
Jul25Warm
Aug25Warm
Sep23Refreshing
Oct20Refreshing
Nov18Cool
Dec16Cool

UV index in Montecatini-Terme 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 Montecatini-Terme peaks around July 13 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 13UV 9Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar5Moderate
Apr7High
May6High
Jun8Very high
Jul9Very high
Aug7Very high
Sep5Moderate
Oct3Moderate
Nov2Low
Dec1Low

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

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 1918 µg/m³Sep 1113 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb15Moderate
Mar18Moderate
Apr17Moderate
May16Moderate
Jun15Moderate
Jul13Moderate
Aug14Moderate
Sep13Moderate
Oct14Moderate
Nov13Moderate
Dec14Moderate
Location & terrain

Where is Montecatini-Terme?

Montecatini-Terme sits at 43.9°N, 10.8°E, 29 m above sea level, in Italy. The nearest listed city is Pistoia, 13 km away.

Topography around Montecatini-Terme

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

Within 3 km, the terrain around Montecatini-Terme has significant variations in elevation — a maximum elevation change of 430 m around an average of 66 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,201 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,129 m.

The land around Montecatini-Terme is covered by trees (52%) and artificial surfaces (27%) within 3 km, trees (67%) within 16 km, and trees (62%) within 80 km.

3 km
430 m
16 km
1,201 m
80 km
2,129 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Pistoia 13 km · Capannori 17 km · Fornacelle 22 km · San Miniato Basso 22 km · Montemurlo 22 km · Lucca 22 km · Empoli 23 km · San Miniato 23 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 Montecatini-Terme (43.8815°, 10.7723°, elevation 29 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).