FPUS64 KBRO 190417 SFTBRO TXZ248>255-351-353>355-451-454-455-191000- Tabular State Forecast for Deep South Texas National Weather Service Brownsville TX 1117 PM CDT Mon May 18 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 Tue 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 81/85 81/84 79/83 78/83 79/82 78/81 77/81 30/20 30/20 10/60 50/30 60/70 60/70 50/50 Port Isabel Mocldy Mocldy Mocldy Mocldy Tstrms Tstrms Tstrms 81/86 81/86 80/85 80/85 80/85 79/85 79/84 30/20 10/20 00/30 40/30 50/50 60/60 40/50 South Padre Island Mocldy Mocldy Mocldy Mocldy Tstrms Tstrms Tstrms 81/84 81/84 81/83 81/84 80/83 80/83 80/82 30/20 10/20 00/30 40/20 50/50 60/60 40/50 ...Rio Grande Valley... Brownsville Mocldy Mocldy Mocldy Mocldy Tstrms Tstrms Tstrms 81/94 81/93 80/91 79/92 80/91 78/90 78/90 30/20 10/20 00/30 40/30 50/50 60/60 40/50 Harlingen Mocldy Mocldy Tstrms Mocldy Tstrms Tstrms Tstrms 79/96 79/94 77/92 76/92 76/90 75/90 74/89 30/20 20/20 00/60 50/30 50/60 60/60 40/50 Raymondville Mocldy Mocldy Tstrms Mocldy Tstrms Tstrms Tstrms 79/96 78/94 76/91 75/91 75/89 74/88 74/88 30/20 30/20 10/70 60/30 60/60 70/70 40/50 Weslaco Mocldy Mocldy Tstrms Mocldy Tstrms Tstrms Tstrms 80/96 79/94 78/91 76/91 76/89 75/89 75/88 30/20 20/20 10/70 60/30 60/60 60/60 40/50 McAllen Mocldy Mocldy Tstrms Mocldy Tstrms Tstrms Tstrms 81/97 80/95 79/92 77/92 77/91 76/90 76/90 30/20 20/20 20/70 60/20 60/60 70/60 50/50 ...Other Deep South Texas Cities... Rio Grande City Mocldy Mocldy Tstrms Mocldy Tstrms Ptcldy Mocldy 79/99 78/95 76/93 74/93 75/91 74/90 74/89 30/20 30/30 50/50 70/20 60/50 70/40 60/40 Falfurrias Mocldy Mocldy Tstrms Mocldy Tstrms Tstrms Tstrms 80/96 77/94 75/90 74/91 75/88 74/87 73/87 30/20 50/30 30/70 60/30 60/80 70/70 50/60 Hebbronville Mocldy Mocldy Tstrms Mocldy Tstrms Tstrms Tstrms 79/95 77/92 74/88 73/88 74/86 73/86 73/85 30/20 40/40 50/70 60/20 60/70 70/50 50/50 Zapata Vryhot Mocldy Tstrms Mocldy Tstrms Ptcldy Mocldy 80/100 79/95 76/92 74/93 75/91 74/90 74/89 20/20 50/40 60/60 70/20 50/50 70/40 60/40 $$