Weather in Half Moon Bay, CA
Half Moon Bay, Friday, 30 October, 05:02
Overcast. Feels like 55°. High 68°, low 50°.
Monthly outlook for Half Moon Bay, CA: average high 63.5°, average low 52.7°. That is 0.5° below the climate normal for October. Precipitation is expected on 4 days (about 1.0 inches), against a normal of 3 days and 1.0 inches. The warmest day looks like 3 November (72.7°), the coolest 31 October (45.4°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 30 October – 8 November | 66.8° | 65.6° | +0.7° |
| 9 November – 18 November | 58° | 62.2° | -2.3° |
| 19 November – 28 November | at normal | 59.5° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Belmont (8 mi).
0Half Moon Bay, Saturday, 31 October
Overcast. High 65°, low 45°.
0.07
Half Moon Bay, Sunday, 1 November
Light rain. High 66°, low 53°.
0Half Moon Bay, Monday, 2 November
Overcast. High 70°, low 51°.
0
Half Moon Bay, Tuesday, 3 November
Partly cloudy. High 73°, low 52°.
0.01Half Moon Bay, Wednesday, 4 November
Light rain. High 65°, low 57°.
0Half Moon Bay, Thursday, 5 November
Overcast. High 61°, low 56°.
0
Half Moon Bay, Friday, 6 November
Clear. High 64°, low 55°.
0Half Moon Bay, Saturday, 7 November
Clear. High 68°, low 56°.
0Half Moon Bay, Sunday, 8 November
Overcast. High 69°, low 59°.
0.35Half Moon Bay, Monday, 9 November
Rain. High 60°, low 56°.
0.09Half Moon Bay, Tuesday, 10 November
Light rain. High 57°, low 53°.
0.44Half Moon Bay, Wednesday, 11 November
Rain. High 58°, low 51°.
0.04Half Moon Bay, Thursday, 12 November
Light rain. High 56°, low 52°.
0Half Moon Bay, Friday, 13 November
Clear. High 58°, low 49°.
0Half Moon Bay, Saturday, 14 November
Clear. High 58°, low 48°.
0.07
Half Moon Bay, Sunday, 15 November
Climate normal for this date — 60-year average.
0.11Half Moon Bay, Monday, 16 November
Climate normal for this date — 60-year average.
0.12Half Moon Bay, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.06Half Moon Bay, Wednesday, 18 November
Climate normal for this date — 60-year average.
0.04Half Moon Bay, Thursday, 19 November
Climate normal for this date — 60-year average.
0.1Half Moon Bay, Friday, 20 November
Climate normal for this date — 60-year average.
0.08Half Moon Bay, Saturday, 21 November
Climate normal for this date — 60-year average.
0.08Half Moon Bay, Sunday, 22 November
Climate normal for this date — 60-year average.
0.06Half Moon Bay, Monday, 23 November
Climate normal for this date — 60-year average.
0.08Half Moon Bay, Tuesday, 24 November
Climate normal for this date — 60-year average.
0.06Half Moon Bay, Wednesday, 25 November
Climate normal for this date — 60-year average.
0.08Half Moon Bay, Thursday, 26 November
Climate normal for this date — 60-year average.
0.07Half Moon Bay, Friday, 27 November
Climate normal for this date — 60-year average.
0.11Half Moon Bay, Saturday, 28 November
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 Half Moon Bay, 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 Half Moon Bay, 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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