Early September 1 September
74°F
Typical afternoon high
26% historical wet-day frequency
Poland · Countryside
Masovia
in September.
Is September a good time?
Mild days.
Fewer overnight stays than August.
September averages 69°F afternoons, with about 8 rain days. Later September is typically cooler.
- Afternoons
- 69°F
- Rain days
- 8
- Visitor demand
- 89%of August peak
Historical Mazowiecki regionalny regional averages, not a forecast or a measure of queues. Overnight demand compares average stays per day.
Overall match
7.2/10 · scores & prioritiesWhat matters most?
Weather 50% · Crowds 30% · Cost 20%
#5 of 12 months here · Balanced mix
Weather8.6/10Very good
CrowdsPeak seasonvs its own year; overnight stays do not measure queuesFor its size, quieter than most of Europe this month
CostModeratefor Europe; Poland-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 69°F (20°C): light layers; nights around 49°F (9°C): a sweater and a light jacket. About 13 hours of daylight. About 8 rain days in a typical September.
A typical day: temperatures & daylightAfternoons, nights & daylight Show detailsHide details
About 13 hours of daylight.
The sun rises about 06:08 and sets about 18:54 (local time, mid-month). Mornings start around 49°F (9°C); afternoons reach about 69°F (20°C). Expect rain on about 8 days in a typical September.
Typical afternoon
69°F (20°C)
average daily high, 15 recent Septembers
Night low
49°F (9°C)
average daily minimum
Daylight
12h 46m
on the 15th, computed from latitude
Early, middle or late?
Early or late September?
Early September is typically warmer. The afternoon high averages 74°F on the 1st, versus 62°F on the 30th.
Mid September 15 September
70°F
Typical afternoon high
27% historical wet-day frequency
Late September 30 September
62°F
Typical afternoon high
28% historical wet-day frequency
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 |
|---|---|---|---|---|---|---|
| 174° | 274° | 373° | 473° | 573° | ||
| 672° | 772° | 872° | 972° | 1071° | 1171° | 1271° |
| 1370° | 1470° | 1570° | 1669° | 1769° | 1868° | 1968° |
| 2067° | 2167° | 2266° | 2365° | 2465° | 2564° | 2664° |
| 2764° | 2863° | 2963° | 3062° |
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 73°F (23°C) in the first week to 64°F (18°C) in the last. The chance of a wet day runs 25–28%.
Crowds and cost
Visitor season
Will it be busy?
Peak season. September averages 89% of August's overnight stays per day. Fewer overnight stays than August.
Overnight stays across Mazowiecki regionalny do not measure queues, day visitors or congestion at individual sights. For its size, quieter than most of Europe this month.
Hotel price season
Will it be cheaper?
A little above usual. Estimated from national hotel prices and local visitor demand; no measured regional room rate is available.
Fewer overnight stays do not automatically mean cheaper rooms. Check actual quotes for your trip.
Poland as a whole
Below EU average
2024 restaurants and hotels price level: 92 where the EU average is 100. A relative index, not a room rate.
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 62°F (17°C) and 76°F (24°C); in 8 of them they were within 3°F (1.5°C) of the typical 69°F (20°C). Rain days ranged from 3 to 16; half the years had 5–11.
Rain days in each September
Rain days
8
at least 1 mm, typical year; about 11 in a wet year
Mostly sunny days
6 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
23 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 | 69°F | 3 |
| 2012 | 67°F | 6 |
| 2013 | 62°F | 11 |
| 2014 | 69°F | 6 |
| 2015 | 68°F | 11 |
| 2016 | 72°F | 3 |
| 2017 | 65°F | 16 |
| 2018 | 71°F | 7 |
| 2019 | 68°F | 12 |
| 2020 | 70°F | 8 |
| 2021 | 65°F | 8 |
| 2022 | 63°F | 9 |
| 2023 | 76°F | 4 |
| 2024 | 75°F | 5 |
| 2025 | 70°F | 8 |
Checked against official climate averages for Plock-Trzepowo and Siedlce. How we check
Compare dates
August, September
or October?
| Typical conditions | Aug | Sep | Oct |
|---|---|---|---|
| Afternoons | 78°F | 69°F | 57°F |
| Rain days | 8 | 8 | 7 |
| Overnight demand | 100% | 89% | 82% |
August: Warmer afternoons than September. More overnight demand. August guide →
October: Cooler afternoons than September. October guide →
Overnight demand measures accommodation stays, not queues.
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.
May has fewer overnight stays than September, with a similar or higher Weather score.
Your comparison
September or August?
Overnight stays are 100% of the busiest month.
National hotel prices and local visitor demand suggest about usual. No measured regional room rate is available.
Read the August guide →| Typical conditions | September | August |
|---|---|---|
| Afternoons | 69°F | 78°F |
| Nights | 49°F | 56°F |
| Rain days | 8 | 8 |
| Visitor season | Peak season | Peak season |
| Overall / 10 | 7.2 | 7.1 |
| Month rank | #5 | #6 |
Every month, in detail Show detailsHide details
| Month | Overall | Rank | High | Low | Rain days | Weather | Visitor season |
|---|---|---|---|---|---|---|---|
| January | 5.7 | #11 | 35°F | 25°F | 14 | 3.7 | Moderate season |
| February | 6.2 | #9 | 39°F | 25°F | 9 | 4.2 | Moderate season |
| March | 7.1 | #7 | 48°F | 30°F | 8 | 5.6 | Moderate season |
| April | 7.6 | #3 | 59°F | 38°F | 9 | 7.0 | Moderate season |
| May | 7.9 | #1 | 68°F | 46°F | 9 | 8.3 | Busy season |
| June | 7.8 | #2 | 76°F | 54°F | 9 | 9.0 | Busy season |
| July | 7.2 | #4 | 78°F | 57°F | 10 | 8.6 | Peak season |
| August | 7.1 | #6 | 78°F | 56°F | 8 | 8.9 | Peak season |
| September | 7.2 | #5 | 69°F | 49°F | 8 | 8.6 | Peak season |
| October | 6.4 | #8 | 57°F | 41°F | 7 | 6.5 | Busy season |
| November | 5.6 | #12 | 45°F | 34°F | 8 | 4.8 | Busy season |
| December | 5.7 | #10 | 39°F | 29°F | 10 | 4.0 | Busy season |
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.
WarsawPoland · about 10 miles
Balanced Overall 7.8 · Very good weather, 69°F (21°C) · Steady all year · Cost moderate
ŁódźPoland · about 90 miles
Balanced Overall 7.7 · Very good weather, 69°F (21°C) · Steady all year · Cost moderate
SilesiaPoland · about 170 miles
Balanced Overall 7.6 · Very good weather, 69°F (21°C) · Steady all year · Cost moderate
Kraków & Lesser Polandabout 180 miles
Balanced Overall 7.6 · Very good weather, 69°F (20°C) · Steady all year · Cost moderate
Gdańsk & PomeraniaPoland · about 180 miles
Balanced Overall 6.9 · Good weather, 67°F (20°C) · Moderate season · Cost moderate
Elsewhere in Europe
Better September weather than Masovia
Masovia's weather ranks 62 of 117 countryside regions this month. These countryside regions outside Poland have clearly better weather on your dates, nearest first, each compared with Masovia.
Southern MunteniaRomania · about 580 miles
Excellent weather (9.6): 8°F warmer afternoons, 4 fewer rain days, cheaper
Romania's Black Sea coast & Danube DeltaRomania · about 590 miles
Excellent weather (9.6): 9°F warmer afternoons, 5 fewer rain days, quieter for its season (low season), cheaper
Castile and LeónSpain · about 1410 miles
Excellent weather (9.8): 9°F warmer afternoons, 3 fewer rain days, quieter for its season (busy season), cheaper
How we knowSources, regional scope & scoring method Show detailsHide details
It's peak season, 89% of the busiest month and 25% above its average month. That means about 6,100 overnight visitors on a typical September night across the region, 84% of them from Poland itself. Rentals booked through Airbnb, Booking, Expedia and Tripadvisor add up to 680 more: 11 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 Plock-Trzepowo and Siedlce from the national weather service, every month: afternoon highs typically within 1°F (0.4°C), night lows within 1°F (0.4°C). |
| Tourist nights per 1,000 residents per day | 3 |
| Busiest month here | August · 3 |
| Visitors as share of people present | 0.3% |
| Rank among Europe's regions this month | 2nd percentile |
| Domestic share of nights | 84% |
| Platform rental nights per 100 counted nights | 11 |
| Visitor share if every platform night were extra | 0.3% |
| National hotel-price season | Poland historical 2024–2025 index: About usual (+2% vs its average month). Not a local room quote. |
| Population used | 2.2 million |
| Statistical region | PL92 · Mazowiecki regionalny |
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. Full method · this region's data.