Union City, CA Weather & Climate Normals
What a normal year in Union City actually looks like
On the 30-year record NOAA keeps for Union City, CA, the comfort score comes out to 78/100, mild with real seasons: A solid stretch of comfortable months alongside a noticeable but not extreme summer or winter. Only 9 months a year land in the 55–75°F range this site treats as mild.
How much Union City's weather actually swings
Average temperatures in Union City run from 51°F in Dec up to 68°F in Aug, a 17.2°F seasonal swing, one of the smaller gaps in this dataset.
Union City, month by month
| Month | Avg high | Avg low | Precip | Snow |
|---|---|---|---|---|
| Jan | 59°F | 43°F | 3in | 0in |
| Feb | 61°F | 44°F | 3.17in | 0in |
| Mar | 65°F | 46°F | 2.52in | 0in |
| Apr | 68°F | 48°F | 1.22in | 0in |
| May | 71°F | 52°F | 0.5in | 0in |
| Jun | 75°F | 55°F | 0.16in | 0in |
| Jul | 78°F | 57°F | 0in | 0in |
| Aug | 78°F | 57°F | 0.02in | 0in |
| Sep | 78°F | 56°F | 0.1in | 0in |
| Oct | 73°F | 52°F | 0.69in | 0in |
| Nov | 65°F | 46°F | 1.59in | 0in |
| Dec | 58°F | 43°F | 2.97in | 0in |
If you're timing a visit, most of the year (9 of 12 months) are Union City's mildest stretch; if you're moving there, you should plan around Dec's cold instead.
How wet Union City actually gets
Over a typical year, Union City sees about 15.94in of precipitation a year across roughly 60 days with measurable rain or snow, with 0in of snow a year.
Union City against the rest of the country
Out of 4876 cities scored here, Union City comes in at 148; within CA alone it ranks 148 of 429. Population is about 66,196.
Checking the actual forecast
These figures come from Fremont, CA US, the NOAA station 4.2 miles from Union City, averaged over 30 years, not tomorrow's forecast.
More on how this is worked out
Why this uses the nearest NOAA station · How the comfort score is calculated