Summary: Under the influence of high pressure, the Houston region will see calm weather this week. We’re going to see some seriously nice conditions before the onshore flow returns by Thursday or so. Unfortunately the weekend will be marred by increasing rain chances. Saturday looks especially wet at this point.

Monday
It’s chilly outside, with lows dropping in the upper 30s to around 40 degrees in Houston this morning. These will be the coldest temperatures of the week, as we’ll see a gradual warming trend heading into the weekend. Skies today will be mostly sunny, with light winds from the northwest, and then the west. Low temperatures tonight will be a bit warmer, generally in the mid-40s in Houston.
Tuesday and Wednesday
These will be a pair of partly sunny days, with highs near 70 degrees, and plenty of dry air. Winds will be light. Lows will drop into the upper 40s for most locations. This will be seriously nice winter weather for Houston.
Thursday and Friday
The pattern will begin to change, slowly, with the return of a more pronounced onshore flow by Thursday. We’ll start to see humidity levels rise some, and winds will be a little more noticeable from the south at about 10 mph. Highs both days will be around 70 degrees, give or take, with partly sunny skies. By Friday night we may only see lows drop into the upper 50s, with a slight chance of rain in response to rising moisture levels.
Saturday and Sunday
In response to an upper-level disturbance we are going to see increasing rain chances from Saturday morning into Sunday morning. The precise contours of this rain are yet unclear, but it’s likely that we’ll see 1 to 3 inches with the best chances during the daytime on Saturday. Highs will be in the upper 60s on Saturday, and then cooler on Sunday in the wake of the cool front, perhaps only 60 degrees. Sunday, probably, will be mostly sunny. Lows on Sunday night will drop to around 40 degrees.

Next week
The start of next week should see the continuation of sunny skies, with days in the 60s and nights in the 40s. All in all, things look fairly mild and dry.
