Solar Energy Potential in Streator, Illinois
Streator, Illinois, located in the Northern Temperate Zone at latitude 41.1225 and longitude -88.8319, offers varying potential for solar PV energy generation throughout the year. The location experiences significant seasonal fluctuations in solar energy production, which is typical for areas in the mid-latitudes of North America. Solar energy production at this location peaks during summer months, with an average daily output of 6.25kWh per kilowatt of installed capacity. Spring follows as the second most productive season, generating 5.29kWh/day per kW installed. Production decreases considerably during autumn to 3.39kWh/day, and reaches its lowest point in winter with only 2.35kWh/day per kW of installed solar capacity.Seasonal Variations and Optimization
The substantial difference between summer and winter production (nearly a threefold decrease) indicates that this location experiences typical mid-latitude seasonal variations. Summer months (June through August) represent the prime solar generation period, while the December to February period offers significantly reduced production potential. For fixed panel installations in Streator, the ideal tilt angle to maximize year-round solar production is 36 degrees facing South. This angle optimizes the annual solar energy capture by balancing seasonal variations and accounting for the Earth's elliptical orbit.Environmental and Weather Considerations
Several environmental factors could potentially impact solar production in Streator:- Snow accumulation during winter months can temporarily reduce output if panels become covered, requiring occasional clearing or the installation of panels at steeper angles to promote snow sliding
- The region experiences cloudy conditions during parts of the year, particularly in late fall and winter, which coincides with the already lower production seasons
- Occasional severe weather events including thunderstorms and potential tornado activity in spring and summer months may require robust mounting systems
Note: The Northern Temperate Zone extends from 35° latitude North up to 66.5° latitude.
So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 4253 locations across the United States. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.
Link: Solar PV potential in the United States by location
Solar output per kW of installed solar PV by season in Streator
Seasonal solar PV output for Latitude: 41.1225, Longitude: -88.8319 (Streator, United States), based on our analysis of 8760 hourly intervals of solar and meteorological data (one whole year) retrieved for that set of coordinates/location from NASA POWER (The Prediction of Worldwide Energy Resources) API:
 
Ideally tilt fixed solar panels 36° South in Streator, United States
To maximize your solar PV system's energy output in Streator, United States (Lat/Long 41.1225, -88.8319) throughout the year, you should tilt your panels at an angle of 36° South for fixed panel installations.
As the Earth revolves around the Sun each year, the maximum angle of elevation of the Sun varies by +/- 23.45 degrees from its equinox elevation angle for a particular latitude. Finding the exact optimal angle to maximise solar PV production throughout the year can be challenging, but with careful consideration of historical solar energy and meteorological data for a certain location, it can be done precisely.
We use our own calculation, which incorporates NASA solar and meteorological data for the exact Lat/Long coordinates, to determine the ideal tilt angle of a solar panel that will yield maximum annual solar output. We calculate the optimal angle for each day of the year, taking into account its contribution to the yearly total PV potential at that specific location.
Seasonally adjusted solar panel tilt angles for Streator, United States
If you can adjust the tilt angle of your solar PV panels, please refer to the seasonal tilt angles below for optimal solar energy production in Streator, United States. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 36° South tilt angle throughout the year.
| Overall Best Summer Angle | Overall Best Autumn Angle | Overall Best Winter Angle | Overall Best Spring Angle |
|---|---|---|---|
| 25° South in Summer | 45° South in Autumn | 55° South in Winter | 34° South in Spring |
Our recommendations take into account more than just latitude and Earth's position in its elliptical orbit around the Sun. We also incorporate historical solar and meteorological data from NASA's Prediction of Worldwide Energy Resources (POWER) API to assign a weight to each ideal angle for each day based on its historical contribution to overall solar PV potential during a specific season.
This approach allows us to provide much more accurate recommendations than relying solely on latitude, as it considers unique weather conditions in different locations sharing the same latitude worldwide.
Calculate solar panel row spacing in Streator, United States
We've added a feature to calculate minimum solar panel row spacing by location. Enter your panel size and orientation below to get the minimum spacing in Streator, United States.
Our calculation method
- Solar Position:
We determine the Sun's position on the Winter solstice using the location's latitude and solar declination. - Shadow Projection:
We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle. - Minimum Spacing:
We add the shadow length to the horizontal space occupied by tilted panels.
This approach ensures maximum space efficiency while avoiding shading during critical times, as the Winter solstice represents the worst-case scenario for shadow length.
Topography for solar PV around Streator, United States
The topography around Streator, Illinois, is characterized by gently rolling plains typical of the American Midwest. Located in north-central Illinois, Streator sits within a region shaped by ancient glacial activity, which left behind a relatively flat landscape with subtle undulations. The elevation in this area averages approximately 600 feet (183 meters) above sea level, with minimal variation across the surrounding terrain. The Vermilion River flows through Streator, having carved a shallow valley that represents one of the few significant topographical features in the immediate vicinity. This waterway has created some modest bluffs and slopes along its course, but these represent relatively minor deviations in an otherwise predominantly level landscape.
Agricultural Dominance
The land surrounding Streator is predominantly agricultural, with extensive corn and soybean fields stretching across the horizon. This agricultural development has further accentuated the flat nature of the region, as farming practices tend to smooth out minor topographical variations. The open farmland creates unobstructed views in many directions, with few natural barriers interrupting the landscape. Scattered woodlots and riparian vegetation along streams provide occasional relief from the agricultural expanses, but these forested areas are limited in both size and elevation change. Small pockets of prairie remnants may also be found, though these natural ecosystems have been largely converted to agricultural use over the past two centuries.Solar PV Potential Areas
The flat, open nature of the landscape around Streator presents excellent opportunities for large-scale solar photovoltaic development. Several characteristics make specific areas particularly suitable: Former agricultural lands with marginal productivity represent prime candidates for solar conversion. These areas often have the necessary infrastructure access while minimizing the impact on prime farmland. The relatively level terrain reduces grading costs during construction and simplifies the installation of mounting systems. Areas adjacent to existing electrical infrastructure, particularly transmission lines and substations, offer significant advantages for solar development. Several such corridors exist in the region surrounding Streator, providing potential connection points for large-scale projects. The existing road network supports construction access and ongoing maintenance requirements. The subtle south-facing slopes found in some portions of the region provide optimal orientation for solar collection. While the elevation changes are modest, even slight southern exposures can improve energy capture efficiency. These areas are often found along the northern banks of the Vermilion River and its tributaries. Brownfield sites, including former industrial areas or reclaimed mining operations, present opportunities for solar development that repurpose previously disturbed land. This approach avoids impacts on undeveloped natural areas while making productive use of land with limited alternative uses. The Streator area has several such sites resulting from its industrial and mining history. The absence of significant topographical barriers means that shading concerns are minimal throughout much of the region. The primary considerations for site selection relate more to land availability, grid connection possibilities, and local zoning regulations rather than topographical constraints. This creates flexibility in identifying suitable project locations within the broader area.United States solar PV Stats as a country
United States ranks 2nd in the world for cumulative solar PV capacity, with 95,209 total MW's of solar PV installed. This means that 3.40% of United States's total energy as a country comes from solar PV (that's 26th in the world). Each year United States is generating 289 Watts from solar PV per capita (United States ranks 15th in the world for solar PV Watts generated per capita). [source]
Are there incentives for businesses to install solar in United States?
Yes, there are several incentives for businesses wanting to install solar energy in the United States. These include federal tax credits, state and local rebates, net metering policies, and renewable energy certificates (RECs). Additionally, many states have enacted legislation that requires utilities to purchase a certain amount of electricity from renewable sources such as solar.
Do you have more up to date information than this on incentives towards solar PV projects in United States? Please reach out to us and help us keep this information current. Thanks!
Citation Guide
Article Details for Citation
Author: Aaron Robinson
Publisher: profileSOLAR.com
First Published: Thursday 24th of April 2025
Last Updated: Monday 8th of September 2025
Tell Us About Your Work
We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.
Feeling generous?
Share this with your friends!

Compare this location to others worldwide for solar PV potential
The solar PV analyses available on our website, including this one, are offered as a free service to the global community. Our aim is to provide education and aid informed decision-making regarding solar PV installations.
However, please note that these analyses are general guidance and may not meet specific project requirements. For in-depth, tailored forecasts and analysis crucial for feasibility studies or when pursuing maximum ROI from your solar projects, feel free to contact us; we offer comprehensive consulting services expressly for this purpose.
Helping you assess viability of solar PV for your site
Calculate Your Optimal Solar Panel Tilt Angle: A Comprehensive Guide
Enhance your solar panel's performance with our in-depth guide. Determine the best tilt angle using hard data, debunk common misunderstandings, and gain insight into how your specific location affects solar energy production.




