FPUS64 KBRO 201827 SFTBRO TXZ248>255-351-353>355-451-454-455-202200- Tabular State Forecast for Deep South Texas National Weather Service Brownsville TX 127 PM CDT Sun Sep 20 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 Mon Tue Wed Thu Fri Sat Sep 20 Sep 21 Sep 22 Sep 23 Sep 24 Sep 25 Sep 26 ...Lower Texas Coast... Port Mansfield Sunny Sunny Sunny Tstrms Tstrms Ptcldy Ptcldy /89 82/89 82/89 82/88 81/90 81/89 80/89 /10 10/10 10/40 10/60 20/50 30/30 20/30 Port Isabel Sunny Sunny Sunny Tstrms Tstrms Ptcldy Ptcldy /90 82/90 82/90 82/90 82/89 81/88 81/88 /10 00/10 10/30 10/50 20/50 40/40 20/30 South Padre Island Sunny Sunny Sunny Tstrms Tstrms Ptcldy Ptcldy /87 83/87 82/87 83/87 82/86 82/86 82/86 /10 00/10 10/30 10/50 20/50 40/40 20/30 ...Rio Grande Valley... Brownsville Ptcldy Sunny Sunny Tstrms Tstrms Ptcldy Ptcldy /97 80/97 80/95 80/95 80/95 80/95 80/95 /10 00/20 00/40 10/50 10/50 30/40 20/30 Harlingen Vryhot Sunny Sunny Tstrms Ptcldy Ptcldy Ptcldy /100 76/99 75/98 76/98 76/98 76/97 75/97 /00 00/10 00/40 10/50 10/40 20/40 10/30 Raymondville Ptcldy Sunny Sunny Tstrms Ptcldy Ptcldy Ptcldy /99 76/98 75/97 76/96 76/96 76/96 75/97 /00 00/10 10/40 10/50 10/40 10/30 10/30 Weslaco Vryhot Sunny Tstrms Tstrms Tstrms Ptcldy Ptcldy /100 78/99 78/97 78/96 78/96 78/96 77/96 /00 00/20 10/60 10/50 10/50 20/40 10/30 McAllen Vryhot Vryhot Tstrms Tstrms Tstrms Shwrs Ptcldy /103 80/103 79/100 79/98 79/98 79/98 78/99 /00 00/20 10/60 10/50 10/50 20/50 10/30 ...Other Deep South Texas Cities... Rio Grande City Vryhot Vryhot Vryhot Ptcldy Ptcldy Ptcldy Ptcldy /102 78/102 77/100 77/98 77/98 77/98 76/99 /00 00/10 10/40 10/40 20/40 30/40 10/20 Falfurrias Vryhot Vryhot Sunny Ptcldy Ptcldy Ptcldy Ptcldy /100 76/100 75/99 75/99 75/99 75/98 75/99 /00 00/10 00/30 10/30 10/30 10/30 10/20 Hebbronville Ptcldy Sunny Sunny Ptcldy Ptcldy Ptcldy Ptcldy /99 75/99 74/97 74/96 74/96 74/95 74/97 /00 00/10 10/30 00/30 10/30 10/30 00/10 Zapata Vryhot Vryhot Vryhot Vryhot Vryhot Vryhot Vryhot /103 79/105 78/103 78/102 77/101 78/101 77/103 /00 00/00 00/20 10/30 10/30 20/30 10/10 $$