Hurricanes and Tornadoes That Hit Olmito, TX

The nearest NOAA station with 1991–2020 climate normals is Brownsville, TX, 11 miles southeast of Olmito at 23 feet. August is the warmest, with an average high of 96°F and low of 78°F; January is the coolest, at 73°F and 53°F. September is the wettest at 5.7 inches of precipitation on average and February the driest at 1.0 inches; the year adds up to 26.9 inches over 39 days with at least a tenth of an inch. June to November, the hurricane season months, bring 68% of the year's precipitation (18.4 of 26.9 inches); the other six months are drier. September has brought the most of the 43 tropical systems that passed within 75 miles (14); a normal September there has highs of 92°F and 5.7 inches of precipitation. Highs reach 90°F on about 140 days a year, almost all from March to October. Lows fall below freezing on about 1 nights a year. That 26.9 inches is more than at 88 of the 312 Texas stations used on this site (28%). San Benito, 8 miles northwest, has its own station (Harlingen, TX): 28.3 inches a year, 1.4 more than here, and an August average high of 98°F against 96°F.

Water temperature at the NOAA tide station Port Isabel, TX, 21 miles east, averaged 87°F in September and 62°F in February over 2021–2025. It averaged 80°F or warmer from May to October. Sea level at the Port Isabel tide gauge, 21 miles from Olmito, has risen 1.71 ± 0.06 inches per decade from 1944 to 2025, NOAA's linear trend; at that pace it is 17.1 inches in a hundred years. That is faster than at 108 of the 144 U.S. gauges with a NOAA trend.

Since 1996, the National Weather Service has logged 110 flood, rain, thunderstorm wind and lightning events that began within 10 miles of Olmito: 42 thunderstorm wind reports, 40 flash floods, 15 heavy rain events, 12 floods and 1 lightning strike. None is recorded as killing or injuring anyone; the NWS estimated $31.5 million in property and crop damage. The strongest thunderstorm gust on record here was 86 mph, on September 19, 2002. July has had the most flash floods, 10 of 40. Of the 745 Texas cities on this site with a flash flood on record, 629 have had fewer than Olmito.

Flood insurance policyholders in Olmito's ZIP code 78575 have filed 26 claims with the National Flood Insurance Program since 1980, and were paid $62,000 for buildings and contents, in the dollars of each year. 62% of the claims carry the name of a storm or flood event; the rest have no event name. Of the 433 Texas cities on this site with 10 or more claims, 106 have fewer than Olmito.