Dated, weather-based
Tomorrow's forecast
Tomorrow's value is a weather-based estimate for Monday, October 5, 2026: 24.3 kWh from the 10 kWp reference system, with a likely range of 18.1 kWh–28.5 kWh. It changes with the next weather forecast.
Poland · 10 kWp reference system
Tarnów solar forecast and PV yield
Forecast target: . Any “tomorrow” label on this page refers to this dated target.
- Tomorrow's forecast
- 24.3 kWh 10 kWp reference system
- Typical annual output
- 10,783 kWh 10 kWp reference system
- Typical specific yield
- 1,078 kWh/kWp Per year
Monday, October 5, 2026
About 24.3 kWh tomorrow
For a standard 10 kWp south-facing system in Tarnów, GridPassport estimates 24.3 kWh on Monday, October 5, 2026, with a likely range of 18.1-28.5 kWh. The strongest production window is expected at 13:00-17:00 local time.
Updated Oct 4, 2026, 11:01 PM GMT+2 · Automatically refreshed- Likely range
- 18.1-28.5 kWh
- Strongest window
- 13:00-17:00
- Confidence
- medium
How to read and use the data
Tarnów solar forecast: daily weather versus long-term PV yield
The daily and annual figures answer different questions. Use the dated forecast to plan tomorrow, and the PVGIS specific yield to compare locations or estimate a typical year.
Multi-year climate baseline
PVGIS specific yield
Tarnów's PVGIS specific yield is about 1,078 kWh/kWp per year. It is a multi-year climate benchmark, not a prediction for tomorrow or for this calendar year. In the PVGIS profile, July is typically the strongest month and December the weakest.
3, 5 and 10 kWp reference systems
Scale the same assumptions to your system size
SystemTomorrow estimate (likely range)PVGIS typical year
3 kWpTomorrow estimate (likely range)7.3 kWh5.4 kWh–8.6 kWhPVGIS typical year3,235 kWh/year
5 kWpTomorrow estimate (likely range)12.2 kWh9.1 kWh–14.3 kWhPVGIS typical year5,392 kWh/year
10 kWpTomorrow estimate (likely range)24.3 kWh18.1 kWh–28.5 kWhPVGIS typical year10,783 kWh/year
Linear reference scaling only: south-facing, 35° tilt and 14% system losses. It does not resize inverter clipping, shade or local roof constraints.
From forecast to a household plan
Battery, EV, heat pump and flexible loads
Treat the forecast as a gross solar-energy budget before household base load and conversion losses. The numbers support scheduling; they do not guarantee surplus.
Battery
Keep room for the solar window
Use 13:00-17:00 as the first candidate charging window. Battery state of charge, reserve settings and inverter limits still decide how much can be stored.
EV
Compare the charge with the 5 kWp budget
The scaled 5 kWp estimate is 12.2 kWh before household use. Compare the remainder after base load with the planned EV charge and stagger charging if needed.
Heat pump
Shift only flexible thermal demand
If comfort controls allow it, place discretionary hot-water heating or pre-heating inside 13:00-17:00. Never override frost protection, hygiene cycles or manufacturer limits.
Large loads
Avoid stacking appliances
A 3 kWp system scales to about 7.3 kWh for the day before household use. Run flexible loads sequentially during the strongest hours rather than assuming all forecast energy is simultaneous power.
Local questions
Solar forecast FAQ
How much could a 5 kWp solar system produce tomorrow in Tarnów?
Using the same south-facing, 35-degree and 14% loss assumptions, the 5 kWp estimate is 12.2 kWh for Monday, October 5, 2026, with a scaled likely range of 9.1 kWh–14.3 kWh. This is a linear reference-system estimate, not a site survey.
What does 1,078 kWh/kWp mean for Tarnów?
It means the PVGIS multi-year profile produces about 1,078 kWh in a typical year for each installed kWp under the reference assumptions. A 5 kWp system therefore scales to about 5,392 kWh in a typical year before site-specific adjustments.
Is the Tarnów forecast the same as the PVGIS annual estimate?
No. Tomorrow's forecast uses dated weather and an uncertainty band for one day. The PVGIS figure is a multi-year climate-based specific yield used for typical monthly and annual comparisons.
When should a battery, EV or heat pump use solar in Tarnów?
Start with 13:00-17:00, then check household base load, battery headroom, EV energy required and heat-pump safety or comfort constraints. The forecast estimates daily energy, not guaranteed instantaneous surplus.
Typical year
Solar production month by month in Tarnów
A standard 10 kWp system produces about 10,783 kWh in a typical year at this location. Monthly averages show seasonality; they are not a forecast for a specific year.
398Jan
551Feb
917Mar
1126Apr
1242May
1276Jun
1316Jul
1264Aug
1041Sep
813Oct
482Nov
355Dec
Values are kWh per month. Source: European Commission JRC PVGIS.
What makes Tarnów's solar profile different?The typical annual yield is about 1,078 kWh per installed kWp, ranking Tarnów #11 of 40 modelled locations in Poland. That is 2% above the median of the 40 Poland locations in this dataset. July is typically the strongest month and December the weakest; the stronger month produces about 3.7 times as much.
See the 12-month data
MonthMonthly outputDaily averageYear-to-year variation
MonthJanuaryMonthly output398 kWhDaily average12.8 kWh/dayYear-to-year variation±111 kWh
MonthFebruaryMonthly output551 kWhDaily average19.7 kWh/dayYear-to-year variation±99 kWh
MonthMarchMonthly output917 kWhDaily average29.6 kWh/dayYear-to-year variation±186 kWh
MonthAprilMonthly output1,126 kWhDaily average37.5 kWh/dayYear-to-year variation±185 kWh
MonthMayMonthly output1,242 kWhDaily average40.1 kWh/dayYear-to-year variation±181 kWh
MonthJuneMonthly output1,276 kWhDaily average42.5 kWh/dayYear-to-year variation±150 kWh
MonthJulyMonthly output1,316 kWhDaily average42.5 kWh/dayYear-to-year variation±146 kWh
MonthAugustMonthly output1,264 kWhDaily average40.8 kWh/dayYear-to-year variation±110 kWh
MonthSeptemberMonthly output1,041 kWhDaily average34.7 kWh/dayYear-to-year variation±156 kWh
MonthOctoberMonthly output813 kWhDaily average26.2 kWh/dayYear-to-year variation±168 kWh
MonthNovemberMonthly output482 kWhDaily average16.1 kWh/dayYear-to-year variation±76 kWh
MonthDecemberMonthly output355 kWhDaily average11.5 kWh/dayYear-to-year variation±107 kWh
Nearby solar forecasts
Compare Tarnów with nearby cities
Tomorrow, in one email
Get Tarnów's solar forecast by email
Tomorrow's expected production, likely range and strongest hours. One useful email each day.
Method and data
Every city uses a 10 kWp system facing south at 35 degrees with 14% system losses. Tomorrow's figure combines hourly weather with GridPassport's PV production and uncertainty model. The monthly profile uses the European Commission JRC PVGIS multi-year climate series. Roof direction, shade, snow, dirt, inverter clipping and local weather can change real output.
CSV and JSON snapshots are published under CC BY 4.0 with source attribution.