Denison, TX 75021 Monthly Weather

Grayson County4:03 PM CDT33.72°N, 96.52°W
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October 2026

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188°/67°3.20 inAvg 81°/61°
288°/66°Avg 80°/60°
3Avg 80°/60°
4Avg 80°/60°
584°/61°Avg 80°/59°
684°/60°Avg 79°/59°
785°/61°Avg 79°/58°
887°/64°Avg 78°/58°
988°/65°Avg 78°/58°
1087°/65°Avg 78°/57°
1187°/65°Avg 77°/57°
1287°/68°Avg 77°/57°
1390°/74°Avg 77°/56°
1487°/73°Avg 76°/56°
1581°/62°Avg 76°/56°
1681°/50°Avg 75°/55°
17Avg 75°/55°
18Avg 75°/54°
19Avg 74°/54°
20Avg 74°/54°
21 Sunny 80°/55°Avg 73°/53°
22 Sunny 82°/57°Avg 73°/53°
23 Mostly Sunny 81°/58°Avg 73°/52°
24 Mostly Sunny 82°/59°Avg 72°/52°
25 Partly Sunny 79°/56°Avg 72°/52°
26 Partly Sunny 77°/57°Avg 71°/51°
27 Partly Sunny 73°/55°Avg 71°/51°
28 Mostly sunny 83°/64°Avg 71°/51°
29 Heavy showers 74°/57°Avg 70°/50°
30 Cloudy 69°/57°Avg 70°/50°
31Avg 69°/50°
Average high86° (normal 78°)
Average low64° (normal 58°)
Warmest / coldest90° / 50°
Precipitation3.20 in (normal 2.04 in to date)
Record high today92° (1927)
Record low today30° (1976)

Observed: Sherman, 11 km away, records since 1897. Normals 1991–2020. Climate data from NOAA's Regional Climate Centers (ACIS); recent days are preliminary. Days ahead: the forecast.

Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Conservative index and reflects what the press published. Terms of use.