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Will it freeze in Union City in the next 7 nights?
No overnight lows at or below 32°F are forecast in Union City during the next 7 nights in the available NWS frost forecast.
Tonight: forecast low 63°F. Above 36°F.
NWS forecast period: Thu, Nov 5, 6:00 PM EST to Fri, Nov 6, 6:00 AM EST.
No nights at or below 36°F in the National Weather Service forecast for the next 7 nights.
- Tonight 63°F Above 36°F · Light Rain Likely then Patchy Fog
- Fri, Nov 6 54°F Above 36°F · Light Rain Likely
- Sat, Nov 7 47°F Above 36°F · Slight Chance Light Rain
- Sun, Nov 8 44°F Above 36°F · Mostly Clear
- Mon, Nov 9 43°F Above 36°F · Mostly Clear
- Tue, Nov 10 45°F Above 36°F · Mostly Clear
- Wed, Nov 11 41°F Above 36°F · Partly Cloudy
Overnight lows from the National Weather Service forecast for this location. This covers the available forecast window, not the first freeze of the whole season. Frost can form above 32°F on clear, calm nights.
Frost and freeze probabilities
Freeze dates shift from year to year. Spring percentages describe the chance of a freeze after the stated date; fall percentages describe the chance of a freeze by that date. The 10% spring date is the cautious one: a later freeze happens about 1 year in 10.
These dates describe historical probabilities, not this year’s forecast or the earliest and latest possible freezes. Different weather stations or probability thresholds can produce different published dates for the same city.
Average first hard freeze in Union City
The median first fall hard-freeze date (28°F) is December 1, from NOAA’s 1991–2020 Climate Normals at New York Cntrl Park Twr. This is the 50% probability date, not a forecast for this year.
| Temperature | Last spring date 90% · 50% · 10% chance of a later freeze | First fall date 10% · 50% · 90% chance of an earlier freeze | Season |
|---|---|---|---|
| 36°F frost possible | Mar 26 · Apr 7 · Apr 20 | Oct 27 · Nov 8 · Nov 23 | 215 days |
| 32°F freeze | Mar 14 · Mar 30 · Apr 9 | Nov 6 · Nov 20 · Dec 6 | 236 days |
| 28°F hard freeze | Mar 5 · Mar 19 · Apr 2 | Nov 15 · Dec 1 · Dec 16 | 257 days |
Average high temperature by month
1991–2020 normals at New York Cntrl Park Twr
Average low temperature by month
Months with lows near or below freezing carry frost risk
Where these frost dates come from
The frost dates for Union City, NJ come from the nearest weather station with freeze statistics in NOAA’s 1991–2020 Climate Normals: New York Cntrl Park Twr (station USW00094728, elevation 130 ft), 3.4 mi from Union City. Local conditions (valleys, hilltops, distance to water, city heat) can shift frost dates by days or weeks. The hardiness zone is from the 2023 USDA Plant Hardiness Zone Map (USDA ARS and Oregon State University PRISM). See our methodology.
Frost dates near Union City
| City | Distance | Last spring frost | First fall frost |
|---|---|---|---|
| Hoboken, NJ | 1.2 mi | Mar 30 | Nov 20 |
| West New York, NJ | 1.9 mi | Mar 30 | Nov 20 |
| Secaucus, NJ | 1.9 mi | Apr 3 | Nov 4 |
| Guttenberg, NJ | 2.5 mi | Mar 30 | Nov 20 |
| Fairview, NJ | 3.7 mi | Mar 30 | Nov 20 |
| Jersey City, NJ | 4.3 mi | Apr 4 | Nov 6 |
| Carlstadt, NJ | 4.3 mi | Apr 3 | Nov 4 |
| East Rutherford, NJ | 4.3 mi | Apr 3 | Nov 4 |
| Cliffside Park, NJ | 4.3 mi | Mar 30 | Nov 20 |
| Ridgefield, NJ | 4.3 mi | Apr 3 | Nov 4 |
Frequently asked questions
When is the last frost in Union City?
On average, the last spring frost (32°F) in Union City is around March 30. In about 1 year in 10 it comes after April 9, and in 9 years in 10 it comes after March 14.
When is the first frost in Union City?
The first fall frost (32°F) usually arrives around November 20. There’s a 10% chance of a freeze by November 6 and a 90% chance by December 6.
Can it frost in Union City after the last frost date?
Yes. Frost can form on clear, calm nights even when the air stays above 32°F. Temperatures of 36°F or lower, cold enough for frost on exposed plants, have a 50% chance of occurring after April 7.
What growing zone is Union City?
Union City is in USDA Plant Hardiness Zone 7b (average annual extreme minimum temperature 5 to 10°F), based on the 2023 USDA map for ZIP code 07087. See growing zones in New Jersey.
More: all New Jersey frost dates · New Jersey growing zones · UV index today in Union City · frost vs. freeze