Observatory / Weather and Sky Conditions

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

Learn how to read the Clear Sky Chart

Rehoboth, NM


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)


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