Provided NWS Houston-Galveston Office
National Weather forecast for the week of April 20, 2026.
Following a wet weekend, the Houston area is expected to see another round of heavy rainfall early in the week.
According to the National Weather Service Houston-Galveston Office, the greater Houston area can expect scattered showers and thunderstorms Tuesday through Wednesday. There is a “marginal risk” for excessive rainfall with some areas forecast to receive 2 to 3 inches of rain, according to the NWS.
Cody Lindsey, a meteorologist at the Houston-Galveston NWS office, said this week’s round of rainfall comes after some areas experienced more than 4 inches of rain this weekend.
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“Generally, in the Houston Metro area, the highest amount we had recorded was 3.2 miles west of Jacinto City, [where] there was a rainfall total of 4.24 inches,” Lindsey said. “There was some pretty heavy rainfall Saturday afternoon and Saturday night with that system that came across there in the Houston metro area, especially east of I-45,”
Following a dry, warm winter earlier this year, Harris County and much of Texas were considered to be in drought conditions.
At the beginning of April, all of Harris County was considered to be in a moderate drought, according to the U.S. Drought Monitor. However, according to the current drought map, which is updated every Thursday, the percentage of Harris County considered to be in a moderate drought dropped from 100% to 57%.
This week’s drought map, which would include Saturday’s rainfall, has not yet been released.
Lindsey said Saturday’s rain has brought the region closer to its yearly average for this time of year.
“It definitely was helpful at Bush Intercontinental Airport,” Lindsey said. “That brings our total for the month at [Bush] to 4.42 inches. That takes that site above normal now for the month actually. … The yearly total comes up to 12.41 inches now, and that’s getting close to normal. Normal is 12.65 inches.”
It’s a similar story at the William P. Hobby Airport. Lindsey said that the area is now at approximately 1.46 inches above normal for the month. However, Hobby is still behind for the year, as it currently sits at 9.89 inches, several inches behind the 12.73-inch average for this time of year.
Much like this past weekend, Lindsey said Houstonians should be prepared for possible isolated flooding.
“Stay weather aware Tuesday and Wednesday for the potential for some localized flooding and heavy rainfall,” he said. “In case any kind of flood [warnings] are issued, know what to do and how to stay safe.”