Weather in Union City, CA
Union City, Sunday, 18 October, 03:20
Clear. Feels like 56°. High 74°, low 49°.
Monthly outlook for Union City, CA: average high 73.3°, average low 55.7°. That is 1.8° 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 26 October (81.4°), the coolest 19 October (44°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 72.1° | 71.2° | +0.5° |
| 28 October – 6 November | 75.3° | 67.7° | +4.2° |
| 7 November – 16 November | at normal | 64° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Hayward (4 mi).
0
Union City, Monday, 19 October
Partly cloudy. High 68°, low 44°.
0.11
Union City, Tuesday, 20 October
Rain. High 66°, low 52°.
0.43Union City, Wednesday, 21 October
Rain. High 67°, low 54°.
0
Union City, Thursday, 22 October
Overcast. High 65°, low 54°.
0
Union City, Friday, 23 October
Mostly clear. High 68°, low 53°.
0
Union City, Saturday, 24 October
Clear. High 77°, low 56°.
0Union City, Sunday, 25 October
Clear. High 80°, low 59°.
0Union City, Monday, 26 October
Overcast. High 81°, low 60°.
0Union City, Tuesday, 27 October
Overcast. High 75°, low 61°.
0Union City, Wednesday, 28 October
Mostly clear. High 74°, low 56°.
0Union City, Thursday, 29 October
Overcast. High 72°, low 54°.
0Union City, Friday, 30 October
Clear. High 77°, low 56°.
0Union City, Saturday, 31 October
Clear. High 79°, low 59°.
0Union City, Sunday, 1 November
Overcast. High 75°, low 61°.
0Union City, Monday, 2 November
Overcast. High 74°, low 62°.
0.03Union City, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.02Union City, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.05Union 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.
0.06Union 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.
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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