Peak Sun Hours in Tomsk, Tomsk Oblast, Russia
- Solar zone
- Zone 1 (modest)
- Best month
- June (5.8)
- Worst month
- December (0.4)
- Climate
- Polar · -0.3°C
Monthly solar breakdown
| Month | GHI | Clear-sky | DNI | DHI | Temp °C | Humid % |
|---|---|---|---|---|---|---|
| Jan | 0.74 | 0.96 | 2.08 | 0.39 | -20.9 | 98 |
| Feb | 1.65 | 2.08 | 3.15 | 0.86 | -17.5 | 98 |
| Mar | 2.90 | 3.85 | 3.75 | 1.58 | -8.3 | 98 |
| Apr | 4.24 | 5.72 | 4.48 | 2.18 | 0.7 | 85 |
| May | 5.05 | 7.31 | 4.79 | 2.43 | 9.3 | 72 |
| Jun | 5.80 | 7.88 | 5.25 | 2.71 | 16.7 | 74 |
| Jul | 5.32 | 7.27 | 4.52 | 2.62 | 18.4 | 76 |
| Aug | 4.29 | 5.97 | 4.34 | 1.99 | 16.0 | 75 |
| Sep | 2.79 | 4.23 | 3.32 | 1.39 | 9.3 | 77 |
| Oct | 1.39 | 2.43 | 2.01 | 0.81 | 0.7 | 85 |
| Nov | 0.65 | 1.16 | 1.38 | 0.40 | -10.0 | 95 |
| Dec | 0.44 | 0.66 | 1.24 | 0.28 | -18.1 | 99 |
GHI, Clear-sky, DNI, DHI in kWh/m²/day. Data: NASA POWER climatology (long-term monthly averages).
Off-grid calculator
Add appliances
- Add an appliance to size a system.
Sizing
- Daily load
- 0.00 kWh
- Panel wattage
- 0 W
- Panel count (400W modules)
- 0
- Battery bank
- 0.0 kWh
Sizing against worst-month PSH of 0.44 kWh/m²/day, 0.77 system efficiency.
About solar in Tomsk
Tomsk, Russia sits at high latitude — summer days are long, winters are dark, and solar output swings hard by season. Its annual peak sun hours average 2.94 kWh/m²/day, a modest solar resource by global standards.
The strongest month in Tomsk is June (summer) at 5.8 kWh/m²/day, and the weakest is December (winter) at 0.44 kWh/m²/day. When sizing a year-round off-grid system, it's standard practice to design against the December value rather than the annual average — otherwise the battery bank runs low during the darkest weeks.
Given the modest resource, Tomsk installations typically oversize panels or combine solar with another source (grid, generator, hydro) for reliability.
FAQ
- What are the peak sun hours in Tomsk?
- Tomsk averages 2.94 peak sun hours per day annually, ranging from 0.44 in December to 5.8 in June.
- How many solar panels do I need in Tomsk?
- Panel count depends on your daily load. At Tomsk's annual average of 2.94 kWh/m²/day, a 5 kWh/day load needs roughly 6 × 400 W panels. Use the calculator above for your actual load.
- What size battery do I need in Tomsk?
- Sizing against Tomsk's worst month (December, 0.44 kWh/m²/day) with 2 days of autonomy at 80% depth of discharge, a 5 kWh/day load needs about a 12.5 kWh battery bank.
- How does Tomsk's solar resource compare globally?
- Tomsk sits in solar zone 1 out of 5 (where 5 is strongest) at 2.94 kWh/m²/day — modest by global standards. For reference, top-tier desert sites average ~6.5 and high-latitude cities around 2.5 kWh/m²/day.
- Can solar work year-round in Tomsk?
- Not alone. Tomsk's worst month (December) delivers just 0.44 kWh/m²/day — near zero during polar night. Solar handles summer easily (5.8 in June) but winter needs wind, hydro, generator, or grid.
- How do you design solar for Tomsk's long winter?
- Don't try to cover winter with solar — size for summer surplus and pair with another source. Battery banks can't bridge months of near-zero output; realistic polar hybrids combine June solar peak with wind or diesel.
- How does Tomsk's summer peak compare to global averages?
- Tomsk's summer month of June delivers 5.8 kWh/m²/day — surprisingly strong because long daylight hours stack up. Summer output can rival mid-latitude cities, then collapses by December.