Weather in Herndon, CA
Herndon, Saturday, 8 August, 18:03
Clear. Feels like 104°. High 105°, low 68°.
Monthly outlook for Herndon, CA: average high 102.9°, average low 66.7°. That is 3.8° above the climate normal for August. Precipitation is expected on 0 days (about 0.0 inches), against a normal of 0 days and 0.0 inches. The warmest day looks like 10 August (113.1°), the coolest 21 August (61.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 8 August – 17 August | 104.3° | 97° | +4° |
| 18 August – 27 August | 100.6° | 94.5° | +3.4° |
| 28 August – 6 September | at normal | 94.8° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Fresno (8 mi).
0Herndon, Sunday, 9 August
Clear. High 108°, low 74°.
0
Herndon, Monday, 10 August
Overcast. High 113°, low 75°.
0Herndon, Tuesday, 11 August
Overcast. High 110°, low 72°.
0Herndon, Wednesday, 12 August
Overcast. High 105°, low 72°.
0.01
Herndon, Thursday, 13 August
Light rain. High 102°, low 71°.
0Herndon, Friday, 14 August
Overcast. High 99°, low 62°.
0Herndon, Saturday, 15 August
Clear. High 101°, low 63°.
0
Herndon, Sunday, 16 August
Partly cloudy. High 101°, low 62°.
0Herndon, Monday, 17 August
Overcast. High 97°, low 66°.
0Herndon, Tuesday, 18 August
Overcast. High 98°, low 65°.
0Herndon, Wednesday, 19 August
Clear. High 103°, low 66°.
0Herndon, Thursday, 20 August
Partly cloudy. High 99°, low 64°.
0Herndon, Friday, 21 August
Clear. High 102°, low 62°.
0Herndon, Saturday, 22 August
Clear. High 101°, low 63°.
0Herndon, Sunday, 23 August
Clear. High 100°, low 62°.
0
Herndon, Monday, 24 August
Climate normal for this date — 60-year average.
0Herndon, Tuesday, 25 August
Climate normal for this date — 60-year average.
0Herndon, Wednesday, 26 August
Climate normal for this date — 60-year average.
0Herndon, Thursday, 27 August
Climate normal for this date — 60-year average.
0Herndon, Friday, 28 August
Climate normal for this date — 60-year average.
0Herndon, Saturday, 29 August
Climate normal for this date — 60-year average.
0Herndon, Sunday, 30 August
Climate normal for this date — 60-year average.
0Herndon, Monday, 31 August
Climate normal for this date — 60-year average.
0Herndon, Tuesday, 1 September
Climate normal for this date — 60-year average.
0Herndon, Wednesday, 2 September
Climate normal for this date — 60-year average.
0Herndon, Thursday, 3 September
Climate normal for this date — 60-year average.
0.02Herndon, Friday, 4 September
Climate normal for this date — 60-year average.
0.02Herndon, Saturday, 5 September
Climate normal for this date — 60-year average.
0.01Herndon, 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 Herndon, CA 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 Herndon, CA 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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