| Date | Event | Starts | Ends | Comment |
| 03/15/2008 | Onan Public Night | 7:00 PM | 10:00 PM | This is an all-weather event. |
| 03/29/2008 | Onan Public Night | 7:00 PM | 10:00 PM | This is an all-weather event. |
| 04/12/2008 | Onan Public Night | 7:00 PM | 10:00 PM | This is an all-weather event. |
| 04/26/2008 | Onan Public Night | 7:00 PM | 10:00 PM | This is an all-weather event. |
| 05/09/2008 | Onan Public Night / ASTRONOMY DAY | 7:00 PM | 10:00 PM | This is an all-weather event. |
| 05/10/2008 | Onan Public Night / ASTRONOMY DAY | 7:00 PM | 10:00 PM | This is an all-weather event. |
| 05/24/2008 | Onan Public Night | 7:00 PM | 10:00 PM | This is an all-weather event. |
| 06/07/2008 | Onan Public Night | 07:00 PM | 10:00 PM | This is an all-weather event. |
| 06/21/2008 | Onan Public Night | 07:00 PM | 10:00 PM | This is an all-weather event. |
| 07/12/2008 | Onan Public Night | 07:00 PM | 10:00 PM | This is an all-weather event. |
| 07/26/2008 | Onan Public Night | 07:00 PM | 10:00 PM | This is an all-weather event. |
| 08/01/2008 | REI / Astronomy Magazine: Campout with the Stars | Noon | Dawn | All weather event |
| 08/02/2008 | REI-Astronomy Magazine: Camping with the Stars | 10:00 AM | Dawn | All weather event |
| 08/09/2008 | Onan Public Night | 07:00 PM | 10:00 PM | This is an all-weather event. |
| 08/23/2008 | Onan Public Night | 07:00 PM | 10:00 PM | This is an all-weather event. |
| 09/06/2008 | Onan Public Night | 07:00 PM | 10:00 PM | This is an all-weather event. |
| 09/20/2008 | Onan Public Night | 07:00 PM | 10:00 PM | This is an all-weather event. |
| 10/04/2008 | Onan Public Night | 07:00 PM | 10:00 PM | This is an all-weather event. |
| 10/18/2008 | Onan Public Night | 07:00 PM | 10:00 PM | This is an all-weather event. |
| 11/01/2008 | Onan Public Night | 07:00 PM | 10:00 PM | This is an all-weather event. |
| 11/08/2008 | Onan Public Night | 07:00 PM | 10:00 PM | This is an all-weather event. |
| 11/22/2008 | Onan Public Night | 07:00 PM | 10:00 PM | This is an all-weather event. |
Many Onan Observatory events are "all-weather" events and take place regardless of weather conditions. However, last minute changes are still possible. Check the Society's phone message at 952-467-2426 for event updates and last minute schedule changes and cancellations.