Weather in Half Moon Bay, CA
Half Moon Bay, Friday, 30 October, 20:03
Overcast. Feels like 57°. High 69°, low 53°.
Monthly outlook for Half Moon Bay, CA: average high 64.5°, average low 54.2°. That is 0° below the climate normal for October. Precipitation is expected on 6 days (about 1.9 inches), against a normal of 3 days and 1.0 inches. The warmest day looks like 2 November (69.4°), the coolest 1 November (46.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 30 October – 8 November | 66.1° | 65.6° | +0.3° |
| 9 November – 18 November | 61.7° | 62.2° | -0.3° |
| 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 64°, low 47°.
0.07
Half Moon Bay, Sunday, 1 November
Light rain. High 64°, low 46°.
0Half Moon Bay, Monday, 2 November
Overcast. High 69°, low 51°.
0.11Half Moon Bay, Tuesday, 3 November
Light rain. High 65°, low 53°.
0
Half Moon Bay, Wednesday, 4 November
Clear. High 68°, low 53°.
0Half Moon Bay, Thursday, 5 November
Overcast. High 63°, low 56°.
0.03Half Moon Bay, Friday, 6 November
Light rain. High 64°, low 57°.
0
Half Moon Bay, Saturday, 7 November
Mostly clear. High 68°, low 56°.
0Half Moon Bay, Sunday, 8 November
Overcast. High 68°, low 59°.
0Half Moon Bay, Monday, 9 November
Overcast. High 66°, low 59°.
0.3Half Moon Bay, Tuesday, 10 November
Light rain. High 62°, low 59°.
0.37Half Moon Bay, Wednesday, 11 November
Light rain. High 61°, low 56°.
0Half Moon Bay, Thursday, 12 November
Overcast. High 61°, low 53°.
0.19Half Moon Bay, Friday, 13 November
Rain. High 61°, low 55°.
0.87Half Moon Bay, Saturday, 14 November
Heavy rain. High 58°, low 54°.
0.07Half Moon Bay, Sunday, 15 November
Climate normal for this date — 60-year average.
0.11
Half 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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