FPUS64 KBRO 191740 SFTBRO TXZ248>255-351-353>355-451-454-455-192200- Tabular State Forecast for Deep South Texas National Weather Service Brownsville TX 1240 PM CDT Tue May 19 2026 ROWS INCLUDE... Daily predominant daytime weather 6AM-6PM Forecast temperatures...early morning low/daytime high Probability of precipitation nighttime 6PM-6AM/daytime 6AM-6PM - indicates temperatures below zero MM indicates missing data FCST FCST FCST FCST FCST FCST FCST Today Wed Thu Fri Sat Sun Mon May 19 May 20 May 21 May 22 May 23 May 24 May 25 ...Lower Texas Coast... Port Mansfield Mocldy Mocldy Tstrms Mocldy Tstrms Tstrms Tstrms /85 80/83 79/83 78/83 78/83 77/83 77/83 /20 30/10 10/50 50/30 60/60 60/60 50/50 Port Isabel Mocldy Mocldy Mocldy Mocldy Tstrms Tstrms Tstrms /86 81/86 80/85 80/85 80/85 79/85 79/85 /20 20/10 10/30 40/30 50/50 60/60 40/50 South Padre Island Mocldy Mocldy Mocldy Mocldy Tstrms Tstrms Tstrms /84 81/84 80/83 81/84 80/83 80/82 79/82 /20 20/10 10/30 40/20 50/50 60/60 40/50 ...Rio Grande Valley... Brownsville Mocldy Mocldy Mocldy Mocldy Tstrms Tstrms Mocldy /94 80/92 80/91 79/92 79/91 78/90 78/90 /20 10/10 10/30 40/30 50/50 60/50 40/40 Harlingen Mocldy Mocldy Mocldy Mocldy Tstrms Tstrms Tstrms /96 78/92 76/92 76/92 77/90 76/90 75/89 /20 20/10 10/40 50/30 50/60 60/60 40/50 Raymondville Mocldy Mocldy Tstrms Mocldy Tstrms Tstrms Tstrms /96 78/92 76/91 75/91 75/89 74/88 74/88 /20 30/20 10/50 60/30 60/60 60/60 40/50 Weslaco Mocldy Mocldy Tstrms Mocldy Tstrms Tstrms Tstrms /96 79/92 77/91 76/91 76/89 75/89 75/88 /20 20/10 10/60 60/30 60/60 60/60 40/50 McAllen Mocldy Mocldy Tstrms Mocldy Tstrms Tstrms Tstrms /97 79/94 78/92 77/92 76/90 75/89 75/89 /20 30/20 20/50 60/20 60/60 60/60 50/50 ...Other Deep South Texas Cities... Rio Grande City Mocldy Mocldy Tstrms Mocldy Mocldy Ptcldy Mocldy /99 77/94 75/93 74/93 75/91 74/90 74/89 /20 40/40 40/50 70/20 60/40 70/40 60/40 Falfurrias Mocldy Mocldy Tstrms Mocldy Tstrms Tstrms Tstrms /96 77/92 75/90 74/91 75/87 74/87 73/87 /20 50/30 30/70 60/30 60/80 70/70 50/60 Hebbronville Mocldy Mocldy Tstrms Mocldy Tstrms Tstrms Tstrms /95 75/90 74/88 73/88 74/86 73/86 73/85 /20 50/30 40/70 60/20 60/70 70/50 50/50 Zapata Vryhot Shwrs Tstrms Mocldy Tstrms Ptcldy Mocldy /100 76/94 75/92 74/93 75/90 74/89 74/89 /20 60/50 50/50 70/20 50/50 70/40 60/40 $$