Weather in Union City, CA
Union City, Tuesday, 20 October, 11:08
Overcast. Feels like 62°. High 68°, low 50°.
Monthly outlook for Union City, CA: average high 72.9°, average low 56.1°. That is 1.9° above the climate normal for October. Precipitation is expected on 2 days (about 0.5 inches), against a normal of 2 days and 0.6 inches. The warmest day looks like 28 October (83°), the coolest 20 October (50.2°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 20 October – 29 October | 74.9° | 70.3° | +2.5° |
| 30 October – 8 November | 69.7° | 67.2° | +1.4° |
| 9 November – 18 November | at normal | 63.4° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Hayward (4 mi).
0.02
Union City, Wednesday, 21 October
Light rain. High 70°, low 53°.
0Union City, Thursday, 22 October
Overcast. High 70°, low 52°.
0
Union City, Friday, 23 October
Clear. High 72°, low 55°.
0Union City, Saturday, 24 October
Clear. High 75°, low 51°.
0Union City, Sunday, 25 October
Clear. High 78°, low 52°.
0Union City, Monday, 26 October
Clear. High 80°, low 59°.
0Union City, Tuesday, 27 October
Overcast. High 80°, low 60°.
0Union City, Wednesday, 28 October
Overcast. High 83°, low 64°.
0Union City, Thursday, 29 October
Overcast. High 72°, low 58°.
0Union City, Friday, 30 October
Overcast. High 71°, low 55°.
0.28Union City, Saturday, 31 October
Rain. High 74°, low 59°.
0.16Union City, Sunday, 1 November
Light rain. High 69°, low 61°.
0Union City, Monday, 2 November
Overcast. High 69°, low 58°.
0Union City, Tuesday, 3 November
Overcast. High 67°, low 56°.
0Union City, Wednesday, 4 November
Clear. High 68°, low 54°.
0.05
Union City, Thursday, 5 November
Climate normal for this date — 60-year average.
0.04Union City, Friday, 6 November
Climate normal for this date — 60-year average.
0.06
Union City, Saturday, 7 November
Climate normal for this date — 60-year average.
0.07Union City, Sunday, 8 November
Climate normal for this date — 60-year average.
0.07Union City, Monday, 9 November
Climate normal for this date — 60-year average.
0.09Union City, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.08Union City, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.06Union City, Thursday, 12 November
Climate normal for this date — 60-year average.
0.13Union City, Friday, 13 November
Climate normal for this date — 60-year average.
0.06Union City, Saturday, 14 November
Climate normal for this date — 60-year average.
0.05Union City, Sunday, 15 November
Climate normal for this date — 60-year average.
0.09Union City, Monday, 16 November
Climate normal for this date — 60-year average.
0.11Union City, Tuesday, 17 November
Climate normal for this date — 60-year average.
0.07Union City, Wednesday, 18 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 Union City, 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 Union City, 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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