Collinsville Weather Forecast

    • 79
    • 98

    Hot

    • 79
    • 100

    Hot

    • 79
    • 101

    Hot

    • 79
    • 102

    Hot

    • 80
    • 102

    Hot

    • 80
    • 102

    Hot

Today 25 Jul Grayson

Mostly sunny. Hot with Highs in the upper 90s. Southwest Winds 5 to 10 Mph. Heat index Values up to 109 in the afternoon.

Tonight 25 Jul Grayson

Mostly clear. Lows in the upper 70s. South Winds 5 to 10 Mph.

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Collinsville Temperature Statistics

July Temperature

Gainesville, Gainesville Municipal Airport (17.4 miles)

  • Lowest 5 July, 2026

    69.8 °F

  • Average July

    83.5 °F

  • Highest 21 July, 2026

    101.7 °F

Climate (2021–2026)

Gainesville, Gainesville Municipal Airport (17.4 miles)

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  • Average Low 2021–2026

    53.7 °F

  • Average 2021–2026

    64.7 °F

  • Average High 2021–2026

    76.6 °F
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