Is it raining now in Kalisz?
Sunny
24 AugNo upcoming precipitation for the next hour.
Last update: 05:00, 24 Aug 2026
Free to download * Essential from $0.83 * Prices vary by region and promotions.
- App Only
Track up to 20 locations
Home, office, kids' school - all at once, no switching tabs.
- App Only
Alerts for each of them
Get notified 15 minutes before rain - while you can still change your plans.
- App Only
Widgets on your home screen
Live radar without opening the app - on your lock screen or home screen.
Rain in Kalisz: What You Need to Know
Kalisz sits directly on the Prosna River, a 217km Warta tributary that runs straight through the historic center of one of Poland's oldest cities. A live Kalisz rain radar earns its keep in July, the wettest month at around 97mm, when convective storms typical of the Wielkopolska lowlands can push the Prosna up fast enough to matter for districts closest to the water. RainViewer's hyperlocal radar shows that river-adjacent risk building in real time.
The mechanism is a river running through low, flat terrain with a large drainage basin — the Prosna covers roughly 4,925 km² before reaching Kalisz. That combination has produced repeated flooding through the city's history, including the major 1997 Poland floods that affected Kalisz directly on the Prosna. A regional forecast can't say whether a summer cell is settling over the Prosna's upper basin, hours from the city, or building directly over Kalisz itself.
RainViewer draws its Kalisz feed from IMGW, refreshed every 5 minutes, reflecting the newest scan rather than an hours-old forecast. The Wielowieś Klasztorna reservoir, now under construction on the Prosna specifically to prevent future floods on the Prosna and Warta with dedicated protection for Kalisz, shows how seriously the city takes this risk. What the radar reveals and a forecast cannot: whether a cell over the Prosna basin is heading toward Kalisz or dissipating upstream.
Rain by Season in Kalisz
Peak rain season (July)
July is Kalisz's wettest month at around 97mm, driven by convective storms typical of the Wielkopolska lowlands. This is the window when Prosna River levels are most likely to rise quickly through the historic center.
Transition months (spring, autumn)
Rainfall moderates outside the July peak, though the Prosna's large drainage basin means upstream storms can still raise river levels with some delay. The textile and manufacturing districts see steadier conditions here.
Low season (winter)
Winters run cold, January averaging around 3°C. Manufacturing sites like the Calisia piano factory and Big Star jeans factory see their most predictable outdoor logistics conditions of the year.
Why You Need a Rain Radar in Kalisz
Aircraft engine plant workers at WSK-Kalisz and Pratt & Whitney
Kalisz hosts two aircraft engine production plants, WSK-Kalisz and Pratt & Whitney Kalisz, both running precision manufacturing with outdoor logistics on tight schedules. A shift lead checking the radar can time an outdoor transfer around a convective cell.
Residents near the Prosna River historic center
The Prosna has repeatedly flooded Kalisz through its history, including the major 1997 Poland floods, and runs directly through the historic core. Households near the river can check the radar during heavy July storms to see how a cell might affect water levels.
Calisia piano and Big Star jeans factory staff
Both manufacturers rely on steady outdoor shipping schedules, and a summer storm settling over the Warta lowland can slow loading docks at either site. Checking the radar before a shipment window shows whether a cell is passing through or settling in.
Textile industry workers
Kalisz's textile production tradition dates to the 15th century, and much of the sector's logistics still involve outdoor material handling. A radar check before moving goods between sites can help avoid a sudden downpour.
Rail travelers on the Warsaw-Kalisz line
Kalisz railway station, built in 1902, serves both Polregio and PKP Intercity trains on the Warsaw-Kalisz line, with no local airport as an alternative. Checking the radar before a journey shows whether rain is settling over the route.
RainViewer Radar Coverage in Kalisz
RainViewer draws radar data for Poland from the Institute of Meteorology and Water Management (IMGW) via danepubliczne.imgw.pl, updated every 5 minutes. Coverage is comprehensive across the country. Kalisz sits on the Prosna River within the wider Warta basin, so upstream storm systems are visible before they reach the historic center.
Kalisz Rain Radar: Frequently Asked Questions
- Is it raining in Kalisz right now?
A live hyperlocal radar is the fastest way to know, since summer convective storms typical of the Wielkopolska lowlands can turn a dry morning wet within minutes and rain often falls on one side of the Prosna while the other stays dry. RainViewer pulls fresh IMGW scans every 5 minutes, reflecting current conditions rather than an hours-old forecast.
- Should I plan outdoor manufacturing logistics around Kalisz's rain?
Sites like the Calisia piano factory and Big Star jeans factory see the highest chance of storm-related delays during the July convective peak. Checking the radar before a scheduled shipment shows whether a cell is passing through or settling in.
- Does rain affect travel on the Warsaw-Kalisz rail line?
Heavy summer storms can slow both Polregio and PKP Intercity services on the Warsaw-Kalisz line running through Kalisz's 1902-built station. Checking the radar before a trip shows whether rain has settled over the route.
- Does Kalisz flood when it rains?
Yes — the Prosna River has repeatedly flooded Kalisz through its history, including the major 1997 Poland floods, and the city is now building the Wielowieś Klasztorna reservoir upstream specifically to prevent future floods. Residents near the historic center should track the radar closely during heavy July storms.
- When is the best time to visit Kalisz to avoid heavy rain?
Winter is the most predictable stretch, January averaging around 3°C and lower rainfall than the July peak of roughly 97mm. Visitors touring the historic center along the Prosna should watch the radar closely during summer convective storms.
- Why is rain in Kalisz linked so closely to flood risk?
Kalisz sits directly on the Prosna River, which drains a roughly 4,925 km² basin before reaching the city, so heavy rain upstream can raise water levels through the historic center even after local skies clear. That's why the city is building the Wielowieś Klasztorna reservoir upstream for dedicated flood protection.
- Is there a live rain radar for Kalisz?
Yes — RainViewer's hyperlocal radar for Kalisz draws directly from IMGW, refreshing every 5 minutes with new scans instead of a periodic update. Coverage extends across the Prosna and Warta basins, so upstream storm systems are visible before they reach the city.
- Can I get a warning before rain hits the Prosna River in Kalisz?
Yes — RainViewer's rain alerts can be set for a point along the Prosna or near the historic center, notifying residents as a cell approaches instead of checking the map manually. That window matters most during the July peak, when river levels can rise quickly.
Track Rain in Kalisz in Real Time
Residents along the Prosna's historic center and shift leads at the WSK-Kalisz and Pratt & Whitney plants both work on a river with a long flood history, including the major 1997 Poland floods. A convective cell over the Prosna basin can raise water levels in the city long after the rain itself moves on.
A generic forecast says scattered storms for Kalisz this week. RainViewer's live hyperlocal radar shows it's already raining over the Prosna basin upstream while the historic center stays dry — the call a resident makes every time a summer cell builds.
Track rain in Kalisz — free Upgrade to Essential for alerts, forecasts, and full radar history
2-hour forecast in 5-minute slices
See whether a cell over the Prosna basin stays upstream or reaches Kalisz's historic center in the next two hours.
Rain alerts before arrival
Set an alert for the Prosna riverside or a manufacturing site and get notified before rain arrives.
Direction arrows on the map
See whether a cell is tracking in from the southwest toward Kalisz or sliding north along the Warta.
48 hours of radar history
Review the last 48 hours to see how a Prosna basin storm system built before river levels rose.
Multiple locations
Track the Prosna riverside, WSK-Kalisz, and the historic center together.
RainViewer
