Jesi weather in September

In September, Jesi sees average daytime highs of 25°C and overnight lows near 16°C, with 67 mm of rain across 8.6 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 27°C in the first days to 23°C by the end. The sky is clear or mostly clear about 49% of the time in September, and the air most often feels comfortable.

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 Jesi's 4th-clearest and 8th-windiest month. For the whole year in context, see Jesi's year-round climate.

Daytime high
25°
4th warmest
Overnight low
16°
9th coldest
Rainfall
67 mm
8.6 wet days
Daylight
12 h 18 min
5:53 AM – 6:10 PM
Cloud cover
43%
4th clearest
Wind
8 km/h
8th windiest
Solar energy
4.44 kWh/m²
Travel score
7.2
out of 10

Jesi is chief town of the homonym municipality.

Air quality
Elevated
PM2.5 17.1 µg/m³ · 2016

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 23°C by the end.

A typical September day in Jesi 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 29°C. Set against its neighbours, September runs about 5°C cooler than August and about 5°C warmer than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12718
22718
32717
42717
52717
62617
72617
82617
92617
102616
112616
122516
132516
142516
152516
162516
172516
182415
192415
202415
212415
222415
232415
242415
252315
262314
272314
282314
292314
302314

How September really feels in Jesi

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.

Jesi 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
Jan10° / 518.71.39.12.1
Feb11° / 568.91.510.22.6
Mar14° / 689.70.711.64.2
Apr17° / 7210.7013.25.5
May22° / 13°6910.3014.56.8
Jun27° / 17°508.1015.26.9
Jul30° / 20°386.3014.96.0
Aug30° / 19°497.6013.86.0
Sep25° / 16°678.6012.37.2
Oct20° / 12°628.7010.86.6
Nov15° / 7510.50.39.54.3
Dec11° / 6910.11.28.82.5

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 19% 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 (%)
17723
27624
37525
47426
57327
67327
77228
87129
97030
106931
116832
126832
136832
146733
156634
166634
176634
186535
196535
206634
216634
226634
236634
246535
256535
266535
276535
286436
296436
306337

Chance of precipitation in September

Any precipitation

Jesi gets around 67 mm of rain over 8.6 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 30% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
129
229
329
429
529
629
729
829
929
1029
1129
1230
1330
1430
1530
1630
1730
1831
1931
2031
2130
2230
2330
2429
2529
2629
2729
2829
2929
3029

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the comfortable band about 34% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
117313913
218313812
319323810
42032389
52133388
62233387
72333386
82433386
92433385
102533375
112633375
122733365
132733354
142833344
152933334
163034324
173234314
183334294
193534284
203634264
213834253
223934233
234135223
244235203
254336192
264436182
274536162
284637152
294737141
304837141

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.

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

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 5:35 AM to 6:09 AM, and sunset from 6:38 PM to 5:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:356:38
213.05:366:36
312.95:386:35
412.95:396:33
512.85:406:31
612.85:416:29
712.75:426:27
812.75:436:25
912.65:446:23
1012.65:466:22
1112.55:476:20
1212.55:486:18
1312.45:496:16
1412.45:506:14
1512.35:516:12
1612.35:536:10
1712.25:546:08
1812.25:556:06
1912.15:566:04
2012.15:576:03
2112.05:586:01
2212.06:005:59
2311.96:015:57
2411.96:025:55
2511.86:035:53
2611.86:045:51
2711.76:055:49
2811.76:075:47
2911.66:085:46
3011.66:095:44

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.44 kWh/m².

For context, solar energy here swings from a low near 1.44 kWh/m² to a high of 6.92 kWh/m² in July across the year — September's 4.44 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.1Bright
35.1Bright
45.0Bright
55.0Bright
64.9Bright
74.9Bright
84.8Bright
94.8Bright
104.7Bright
114.7Bright
124.6Bright
134.5Bright
144.5Bright
154.5Bright
164.4Bright
174.3Bright
184.3Bright
194.3Bright
204.2Bright
214.2Bright
224.1Bright
234.0Bright
244.0Bright
254.0Moderate
263.9Moderate
273.9Moderate
283.8Moderate
293.8Moderate
303.7Moderate
Planning a trip in September

Is September a good time to visit Jesi?

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
6.4
Beach & pool
4th-best month of the year

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

What to pack for Jesi in September

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

In September, Jesi sees daytime highs around 25°C and nights near 16°C. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

Sea temperature near Jesi 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 16 km away) is warmest in August at about 26°C and coldest in March near 11°C.

It's comfortable for a long swim from Jun 2 to Oct 10 — about 4.3 months when the water holds above 20°C.

10°15°20°25°30°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan13Bracing
Feb11Bracing
Mar11Bracing
Apr13Bracing
May18Cool
Jun22Refreshing
Jul25Warm
Aug26Warm
Sep23Refreshing
Oct19Cool
Nov16Cool
Dec14Bracing

UV index in Jesi 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 Jesi peaks around July 16 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 16UV 9Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb3Moderate
Mar5Moderate
Apr6High
May7High
Jun8Very high
Jul9Very high
Aug8Very high
Sep5High
Oct3Moderate
Nov2Low
Dec1Low

Air quality in Jesi 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 Jesi is worst in March — around 22 µg/m³ PM2.5 (moderate), about 1.6× the cleanest month (September, 14 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Jesi's WHO annual average of 17.1 µg/m³.

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMar 1922 µg/m³Sep 1414 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar22Moderate
Apr21Moderate
May18Moderate
Jun18Moderate
Jul15Moderate
Aug15Moderate
Sep14Moderate
Oct16Moderate
Nov14Moderate
Dec14Moderate
Location & terrain

Where is Jesi?

Jesi sits at 43.5°N, 13.2°E, 97 m above sea level, in Italy. The nearest listed city is Falconara Marittima, 17 km away.

Topography around Jesi

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

Within 3 km, the terrain around Jesi has only modest variations in elevation — a maximum elevation change of 147 m around an average of 89 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 645 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,455 m.

The land around Jesi is covered by cropland (43%) and trees (23%) within 3 km, cropland (61%) within 16 km, and trees (34%), water (29%) and cropland (22%) within 80 km.

3 km
147 m
16 km
645 m
80 km
2,455 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Falconara Marittima 17 km · Osimo 20 km · Senigallia 22 km · Ancona 24 km · Macerata 30 km · Fabriano 34 km · Tolentino 35 km · Fano 40 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 Jesi (43.5214°, 13.2437°, elevation 97 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).