Weather
Before visiting the observatory, be sure to check both the weather and sky conditions. Below you will find both weather reports and detailed information about times for sunrise/set and moonrise/set.
Current weather conditions
Learn how to read the Clear Sky Chart
Grand Rapids, MI
- Clear Sky Chart (Will it be clear tonight?)
- CNN: Grand Rapids, MI
- Michigan Live (Grand Rapids Press)
- National Weather Service
- Weather Underground (current conditions in full detail)
- Calvin College WebCam
- Calvin College Wind Turbine Weather Station
- Local TV forecasts: WOOD TV8 | WWMT TV3 | WZZM TV13 | WXMI TV17
Learn how to read the Clear Sky Chart
Rehoboth, NM
- Clear Sky Chart (Will it be clear tonight?)
- CNN: Gallup, NM
- National Weather Service
- Weather Underground (current conditions in full detail)
- Rehoboth WebCam
- Calvin-Rehoboth Observatory Weather Station
General
- Radar, National Mosaic from NWS
- UM Weather
- Unisys Weather
- US Jet Stream Map
- US Temperature Map
- The Weather Channel
Astronomical calendars (sunrise and sunset times)
Before you visit the observatory, check the astronomical calendars listed below to note sunrise and sunset times.
Please note that when Daylight Savings Time is in effect, add one hour to the time given in the tables above. Daylight Saving Time begins at 2:00 am on the second Sunday in March (at which time clocks are advanced) and end at 2:00 am on the first Sunday in November (at which time clocks are moved back). For the year 2020, DST begins March 8 and ends November 1.
Astronomical calendar for Calvin University Observatory, Michigan (EST)
Astronomical calendar for Rehobeth Observatory, New Mexico (MST)
- Sunrise/sunset and nautical twilight
- Moonrise/moonset
- Nautical twilight