Early September 1 September
86°F
Typical afternoon high
Italy · City
Rome & Lazio
in September.
Is September a good time?
Warm days.
A steady visitor season.
September averages 81°F afternoons and 76°F seas. Later September is typically cooler.
- Afternoons
- 81°F
- Sea
- 76°F
- Visitor demand
- 86%of July peak
Historical Lazio regional averages, not a forecast or a measure of queues. Overnight demand compares average stays per day. Covers Rome, Tivoli and Ostia; conditions vary within the region.
Overall match
7.4/10 · scores & prioritiesWhat matters most?
Weather 50% · Crowds 30% · Cost 20%
#5 of 12 months here · Balanced mix
Weather8.7/10Very good
CrowdsSteady all yearsimilar all year; overnight stays do not measure queues
CostPriceyfor Europe; Italy-wide price level
Overall combines weather, overnight demand and cost. It does not include sea temperature.
Plan your September
What to expect.
What should I pack?
Afternoons around 81°F (27°C): summer clothes; nights around 62°F (17°C): light layers. About 13 hours of daylight.
Can I swim in September?
The sea averages 76°F. Our swimming guide: warm for swimming. Your comfort will vary. This is open water near the coast, not a beach-specific reading.
Monthly coastal averages from NOAA, 2011–2025. Sea temperature is separate from the weather and Overall scores.
A typical day: temperatures & daylightAfternoons, nights, sea temperature & daylight Show detailsHide details
About 13 hours of daylight.
The sun rises about 06:48 and sets about 19:21 (local time, mid-month). Mornings start around 62°F (17°C); afternoons reach about 81°F (27°C).
Typical afternoon
81°F (27°C)
average daily high, 15 recent Septembers
Night low
62°F (17°C)
average daily minimum
Sea
76°F (25°C)
warm; open water near the coast, NOAA satellite record 2011–2025
Daylight
12h 33m
on the 15th, computed from latitude
Early, middle or late?
Early or late September?
Early September is typically warmer. The afternoon high averages 86°F on the 1st, versus 76°F on the 30th.
Mid September 15 September
82°F
Typical afternoon high
Late September 30 September
76°F
Typical afternoon high
Historical daily averages from 2011–2025, smoothed over two weeks. A seasonal pattern, not a forecast. This does not establish which week has the lowest prices or fewest visitors.
Daily calendar & holiday datesSeptember 2027 · historical weather & dated holidays Show calendarHide calendar
September 2027 calendar
Weather shows historical patterns, not a forecast. Holidays and events use the dates shown for 2027.
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
| 186° | 285° | 385° | 485° | 584° | ||
| 684° | 784° | 883° | 983° | 1083° | 1183° | 1283° |
| 1382° | 1482° | 1582° | 1681° | 1781° | 1880° | 1980° |
| 2080° | 2179° | 2279° | 2379° | 2478° | 2578° | 2677° |
| 2777° | 2877° | 2976° | 3076° |
Afternoon high rain likely (25%+) local school holidays public holiday event
School-holiday dates for September 2027 aren't available in our data yet. A day without a school marker doesn't mean schools are open.
Afternoons cool from about 85°F (29°C) in the first week to 77°F (25°C) in the last.
Crowds, cost and getting there
Visitor season
Will it be busy?
Steady all year. September averages 86% of July's overnight stays per day. Overnight demand varies little across the year.
Overnight stays across Lazio do not measure queues, day visitors or congestion at individual sights.
Hotel price season
Will it be cheaper?
Well above usual. The regional index has no room-rate baseline in euros.
Fewer overnight stays do not automatically mean cheaper rooms. Check actual quotes for your trip.
Italy as a whole
Above EU average
2024 restaurants and hotels price level: 107 where the EU average is 100. A relative index, not a room rate.
Recorded US nonstop flights · 2024
Recorded this month
from New York JFK, Chicago, Washington Dulles and Atlanta and 9 more; 2024 schedule, Eurostat
The hotel-season index is regional (ISTAT, NIC consumer price index for accommodation services (ECOICOP 112), by region); the country price level is national. Neither is a room quote.
Year-to-year variation
How much does September vary?
Across the recorded years
In the 15 years from 2011 to 2025, the month's afternoons averaged between 76°F (24°C) and 85°F (29°C); in 12 of them they were within 3°F (1.5°C) of the typical 81°F (27°C).
Rain days
—
not shown here: our data counts more rain days than the local weather stations here (1.34 times theirs)
Mostly sunny days
12 of 30
cloud cover under 30%
Years with a 95°F+ day
0 of 15
no September in the last 15 years had a day at or above 95°F (35°C)
Good weather days
24 of 30
rated very good or better
See every recorded SeptemberHistorical monthly averages, year by year Show detailsHide details
| Year | Afternoon high | Rain days |
|---|---|---|
| 2011 | 85°F | Unavailable |
| 2012 | 80°F | Unavailable |
| 2013 | 80°F | Unavailable |
| 2014 | 80°F | Unavailable |
| 2015 | 80°F | Unavailable |
| 2016 | 80°F | Unavailable |
| 2017 | 76°F | Unavailable |
| 2018 | 82°F | Unavailable |
| 2019 | 82°F | Unavailable |
| 2020 | 82°F | Unavailable |
| 2021 | 83°F | Unavailable |
| 2022 | 81°F | Unavailable |
| 2023 | 85°F | Unavailable |
| 2024 | 80°F | Unavailable |
| 2025 | 81°F | Unavailable |
Checked against official climate averages for Roma Fiumicino. How we check
Compare dates
August, September
or October?
| Typical conditions | Aug | Sep | Oct |
|---|---|---|---|
| Afternoons | 90°F | 81°F | 72°F |
| Sea | 79°F | 76°F | 72°F |
| Rain days | Unavailable | Unavailable | Unavailable |
| Overnight demand | 86% | 86% | 86% |
August: Warmer afternoons and warmer sea than September. August guide →
October: Cooler afternoons and cooler sea than September. October guide →
Overnight demand measures accommodation stays, not queues. Sea temperatures are monthly coastal averages.
Compare any of the 12 monthsChoose another month and compare it with September Show comparisonHide comparison
Yellow marks the top three months on the Balanced mix. September stays as your reference.
Hotel stays vary little through the year. May has a Weather score at least 1.0 point higher than September.
Your comparison
September or August?
Overnight stays vary little through the year.
Historical regional hotel-price season: about usual. There is no room-rate baseline in euros.
Read the August guide →| Typical conditions | September | August |
|---|---|---|
| Afternoons | 81°F | 90°F |
| Nights | 62°F | 68°F |
| Sea | 76°F | 79°F |
| Rain days | Unavailable | Unavailable |
| Visitor season | Steady all year | Steady all year |
| Overall / 10 | 7.4 | 6.9 |
| Month rank | #5 | #8 |
Every month, in detail Show detailsHide details
| Month | Overall | Rank | High | Low | Sea | Rain days | Weather | Visitor season |
|---|---|---|---|---|---|---|---|---|
| January | 6.6 | #12 | 55°F | 40°F | 60°F | — | 6.2 | Steady all year |
| February | 6.7 | #11 | 57°F | 41°F | 58°F | — | 6.4 | Steady all year |
| March | 7.0 | #7 | 62°F | 44°F | 58°F | — | 7.3 | Steady all year |
| April | 7.7 | #3 | 68°F | 48°F | 60°F | — | 9.0 | Steady all year |
| May | 7.9 | #1 | 74°F | 55°F | 65°F | — | 9.7 | Steady all year |
| June | 7.4 | #4 | 84°F | 63°F | 72°F | — | 8.7 | Steady all year |
| July | 6.8 | #9 | 90°F | 67°F | 78°F | — | 7.4 | Steady all year |
| August | 6.9 | #8 | 90°F | 68°F | 79°F | — | 7.2 | Steady all year |
| September | 7.4 | #5 | 81°F | 62°F | 76°F | — | 8.7 | Steady all year |
| October | 7.8 | #2 | 72°F | 56°F | 72°F | — | 9.5 | Steady all year |
| November | 7.1 | #6 | 63°F | 49°F | 67°F | — | 7.4 | Steady all year |
| December | 6.8 | #10 | 57°F | 42°F | 62°F | — | 6.6 | Steady all year |
Near here
Nearby places in September
Nearby regions, nearest first. Distances are centre to centre, as the crow flies; they are not road distances or journey times.
AbruzzoItaly · about 60 miles
Balanced Overall 8.1 · Excellent weather, 79°F (26°C) · Low season · Cost pricey
UmbriaItaly · about 70 miles
Balanced Overall 7.6 · Excellent weather, 80°F (26°C) · Busy season · Cost pricey
MarcheItaly · about 100 miles
Balanced Overall 8.1 · Excellent weather, 79°F (26°C) · Moderate season · Cost pricey
TuscanyFlorence, Siena · Italy · about 130 miles
Balanced Overall 7.4 · Excellent weather, 79°F (26°C) · Busy season · Cost pricey
Amalfi Coast & NaplesCampania · Italy · about 130 miles
Balanced Overall 7.3 · Excellent weather, 80°F (27°C) · Busy season · Cost pricey
Elsewhere in Europe
Better September weather than Rome & Lazio
Rome & Lazio's weather ranks 23 of 41 city regions this month. These city regions outside Italy have clearly better weather on your dates, nearest first, each compared with Rome & Lazio.
How we knowSources, regional scope & scoring method Show detailsHide details
Hotel stays are steady all year here: this month is 86% of the busiest and 10% above average. That counts overnight stays, not how busy the sights are.The figures cover the whole Lazio region, suburbs included. That means about 171,000 overnight visitors on a typical September night across the region, 25% of them from Italy itself. Rentals booked through Airbnb, Booking, Expedia and Tripadvisor add up to 65,000 more: 38 for every 100 counted above. Some are the same properties counted twice.
| Climate suitability (HCI:Urban, 0–100) | 78 |
| How our weather was checked | Official climate averages for Roma Fiumicino from the national weather service, every month: afternoon highs typically within 2°F (0.9°C), night lows within 3°F (1.6°C). |
| Tourist nights per 1,000 residents per day | 30 |
| Busiest month here | July · 35 |
| Visitors as share of people present | 2.9% |
| Rank among Europe's regions this month | 77th percentile |
| Domestic share of nights | 25% |
| Platform rental nights per 100 counted nights | 38 |
| Visitor share if every platform night were extra | 4.0% |
| Regional hotel-price season | Well above usual (+11% vs this region's average month). Historical index from ISTAT, NIC consumer price index for accommodation services (ECOICOP 112), by region; no euro room-rate baseline. |
| Population used | 5.7 million |
| Statistical region | ITI4 · Lazio |
Crowds: Eurostat nights spent at tourist accommodation, by month and NUTS 2 region, 2024–2025 average. Overnight visitors per night is the month's nights divided by its days; the per-1,000 figure is Eurostat's, against each year's population. Platform rentals: Eurostat nights booked via Airbnb, Booking, Expedia and Tripadvisor, 2024–2025 average, shown separately because some properties are in both counts. Weather: Holiday Climate Index computed from ERA5 reanalysis with daily highs, night lows and rain days corrected from open national weather-service station records, 2011–2025, population-weighted to the region; day-by-day figures are the same data averaged by date. Heat and rain odds are counted across those years. Sunrise and sunset: NOAA solar equations, local time. Prices: Eurostat price level index and HICP, national; the first figure is regional (ISTAT, NIC consumer price index for accommodation services (ECOICOP 112), by region). Full method · this region's data.