Weather in Union City, CA
Union City, Saturday, 17 October, 06:20
Clear. Feels like 58°. High 89°, low 57°.
Monthly outlook for Union City, CA: average high 67.2°, average low 53.8°. That is 1.8° below the climate normal for October. Precipitation is expected on 5 days (about 1.6 inches), against a normal of 2 days and 0.6 inches. The warmest day looks like 17 October (89.3°), the coolest 30 October (48.3°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 17 October – 26 October | 70° | 71.7° | -1° |
| 27 October – 5 November | 62.6° | 68° | -3° |
| 6 November – 15 November | at normal | 64.3° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — Hayward (4 mi).
0
Union City, Sunday, 18 October
Clear. High 75°, low 49°.
0
Union City, Monday, 19 October
Overcast. High 64°, low 56°.
0.02
Union City, Tuesday, 20 October
Light rain. High 64°, low 51°.
0.25Union City, Wednesday, 21 October
Light rain. High 70°, low 53°.
0.04Union City, Thursday, 22 October
Light rain. High 64°, low 57°.
0
Union City, Friday, 23 October
Partly cloudy. High 67°, low 55°.
0Union City, Saturday, 24 October
Overcast. High 68°, low 56°.
0.22Union City, Sunday, 25 October
Rain. High 68°, low 57°.
0Union City, Monday, 26 October
Clear. High 71°, low 53°.
0Union City, Tuesday, 27 October
Overcast. High 67°, low 56°.
0Union City, Wednesday, 28 October
Overcast. High 69°, low 55°.
0.01Union City, Thursday, 29 October
Light rain. High 61°, low 53°.
0Union City, Friday, 30 October
Partly cloudy. High 61°, low 48°.
0.26Union City, Saturday, 31 October
Rain. High 61°, low 51°.
0.84Union City, Sunday, 1 November
Rain. High 56°, low 52°.
0.03
Union City, Monday, 2 November
Climate normal for this date — 60-year average.
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.
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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