Weather in Sunnyvale, TX
Sunnyvale, Saturday, 8 August, 19:57
Overcast. Feels like 96°. High 101°, low 80°.
Monthly outlook for Sunnyvale, TX: average high 106.4°, average low 81.2°. That is 7.1° above the climate normal for August. Precipitation is expected on 1 day (about 0.1 inches), against a normal of 3 days and 1.2 inches. The warmest day looks like 20 August (111.5°), the coolest 9 August (73.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 104.7° | 93.8° | +6.1° |
| 18 August – 27 August | 109.3° | 93.4° | +8.8° |
| 28 August – 6 September | at normal | 90.5° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Mesquite (3 mi).
0
Sunnyvale, Sunday, 9 August
Mostly clear. High 100°, low 73°.
0
Sunnyvale, Monday, 10 August
Clear. High 104°, low 81°.
0Sunnyvale, Tuesday, 11 August
Clear. High 105°, low 81°.
0Sunnyvale, Wednesday, 12 August
Mostly clear. High 106°, low 81°.
0Sunnyvale, Thursday, 13 August
Overcast. High 106°, low 80°.
0
Sunnyvale, Friday, 14 August
Partly cloudy. High 106°, low 79°.
0Sunnyvale, Saturday, 15 August
Clear. High 106°, low 81°.
0
Sunnyvale, Sunday, 16 August
Light rain. High 107°, low 83°.
0Sunnyvale, Monday, 17 August
Clear. High 107°, low 82°.
0Sunnyvale, Tuesday, 18 August
Clear. High 108°, low 81°.
0Sunnyvale, Wednesday, 19 August
Clear. High 110°, low 84°.
0Sunnyvale, Thursday, 20 August
Clear. High 112°, low 85°.
0Sunnyvale, Friday, 21 August
Clear. High 110°, low 84°.
0Sunnyvale, Saturday, 22 August
Overcast. High 108°, low 81°.
0Sunnyvale, Sunday, 23 August
Clear. High 108°, low 82°.
0.04Sunnyvale, Monday, 24 August
Climate normal for this date — 60-year average.
0.02Sunnyvale, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.05Sunnyvale, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.07
Sunnyvale, Thursday, 27 August
Climate normal for this date — 60-year average.
0.09Sunnyvale, Friday, 28 August
Climate normal for this date — 60-year average.
0.13Sunnyvale, Saturday, 29 August
Climate normal for this date — 60-year average.
0.09Sunnyvale, Sunday, 30 August
Climate normal for this date — 60-year average.
0.1Sunnyvale, Monday, 31 August
Climate normal for this date — 60-year average.
0.13Sunnyvale, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.18Sunnyvale, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.11Sunnyvale, Thursday, 3 September
Climate normal for this date — 60-year average.
0.05Sunnyvale, Friday, 4 September
Climate normal for this date — 60-year average.
0.2Sunnyvale, Saturday, 5 September
Climate normal for this date — 60-year average.
0.11Sunnyvale, Sunday, 6 September
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Sunnyvale, TX are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Sunnyvale, TX since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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