Houston is plagued by poor weather much of the time. On the nights of the observatory open houses, check the open house page around sunset or later to make sure it will not be cancelled due to clouds. If it is raining, or has rained significantly during the afternoon, the observatory will be closed.

Click for Houston, Texas Forecast

Seven-day Houston Forecast
Visible cloud cover for US [daytime only]
IR cloud cover for Texas
0-7 day Meteogram
8-16 day Meteogram