Updated final list (except for weather/time of day variations, which still haven't been completely made clear):
1. Rio
2. Daytona / Daytona Night
3. Watkins Glen
4. Brands Hatch / Brands Hatch Rain
5. Indianapolis (new reworked layout)
6. Prague
7. Bathurst
8. Nurburgring / Nurburgring Night / Nurburgring Rain
9. Sebring / Sebring Night / Sebring Rain
10. Road America / Road America Night
11. Road Atlanta
12. Long Beach
13. Top Gear Test Track
14. Yas Marina / Yas Marina Night
15. Airfield Test Course
16. Le Mans / Le Mans Night
17. Laguna Seca
18. Bernese Alps
19. Circuit de Catalunya
20. Circuit de Spa Francorchamps / Spa Francorchamps Night / Spa Francorchamps Rain
21. Silverstone / Silverstone Rain
22. Lime Rock Park
23. Monza
24. Circuit of the Americas
25. Hockenheimring
26. Sonoma
Partial credits to ShamePain.
By the looks of this post, there's a chance of different ToD for all tracks (except full night, which we know is restricted to some of the courses, and possibly dusk/dawn, since it would demand functioning headlights beams from cars as well):
1. Rio
2. Daytona / Daytona Night
3. Watkins Glen
4. Brands Hatch / Brands Hatch Rain
5. Indianapolis (new reworked layout)
6. Prague
7. Bathurst
8. Nurburgring / Nurburgring Night / Nurburgring Rain
9. Sebring / Sebring Night / Sebring Rain
10. Road America / Road America Night
11. Road Atlanta
12. Long Beach
13. Top Gear Test Track
14. Yas Marina / Yas Marina Night
15. Airfield Test Course
16. Le Mans / Le Mans Night
17. Laguna Seca
18. Bernese Alps
19. Circuit de Catalunya
20. Circuit de Spa Francorchamps / Spa Francorchamps Night / Spa Francorchamps Rain
21. Silverstone / Silverstone Rain
22. Lime Rock Park
23. Monza
24. Circuit of the Americas
25. Hockenheimring
26. Sonoma
Partial credits to ShamePain.
By the looks of this post, there's a chance of different ToD for all tracks (except full night, which we know is restricted to some of the courses, and possibly dusk/dawn, since it would demand functioning headlights beams from cars as well):
Rain at different times of day, yes, but no rain at full night, sorry! Let's see what the future brings.