Dorchester, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Dorchester, a city in Grayson County, Texas.
Today
99°F
Sunny
Sunny, with a high near 99. Heat index values as high as 100. South wind 5 to 10 mph.
7-day forecast for Dorchester
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 99°F | Sunny | 5 to 10 mph S | 2% |
| Tonight | 76°F | Mostly Clear | 5 to 10 mph SSE | 2% |
| Wednesday | 99°F | Sunny | 5 to 10 mph SSW | 0% |
| Wednesday Night | 78°F | Mostly Clear | 10 mph SSE | 0% |
| Thursday | 98°F | Sunny | 10 mph SSW | 2% |
| Thursday Night | 77°F | Mostly Clear | 10 mph SSE | 2% |
| Friday | 97°F | Sunny | 5 to 10 mph S | 11% |
| Friday Night | 76°F | Mostly Clear | 5 to 10 mph SSE | 11% |
| Saturday | 96°F | Sunny | 5 to 10 mph S | 7% |
| Saturday Night | 76°F | Mostly Clear | 10 mph SSE | 7% |
| Sunday | 96°F | Sunny | 5 to 10 mph S | 4% |
| Sunday Night | 76°F | Mostly Clear | 10 mph SSE | 4% |
| Monday | 96°F | Sunny | 10 to 15 mph S | 3% |
| Monday Night | 77°F | Mostly Clear | 10 mph S | 3% |
Forecast source: National Weather Service (api.weather.gov) for Dorchester (33.531, -96.689). Updated through the day.
Growing snapshot for Dorchester
Last spring frost
Mar 14
First fall frost
Nov 19
Growing season
250 days
Hardiness zone
8a
More local growing data for Dorchester: nearby ZIP 75459 weather · frost dates · planting calendar · Texas frost dates
Nearby towns & communities
Bells
Callisburg
Collinsville
Denison
Gunter
Howe
Knollwood
Lake Kiowa
Pottsboro
Sadler
Sherman
Sherwood Shores
Southmayd
Tioga
Tom Bean
Van Alstyne
Whitesboro
Whitewright
Climate data from the nearest NOAA station, Sherman, Tx (12.3 mi from Dorchester). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.